HK1109177B - Sewing frame of sewing machine and sewing frame drive mechanism - Google Patents

Description

Sewing frame of sewing machine and sewing frame driving mechanism

Technical Field

The present invention relates to a sewing frame for expanding and holding a material to be sewn in order to embroider the material to be sewn by a sewing machine, and a sewing frame driving mechanism for driving the sewing frame.

Technical Field

Among such sewing frame drive mechanisms, there is a mechanism in which the rear end of a cylindrical frame-shaped sewing frame 880 for stretching and holding a sewing object (not shown) is rotatably supported by a rod frame-shaped support frame 910 which can be displaced in the front-rear direction but cannot be displaced in the left-right direction, as in the conventional sewing frame drive mechanism 900 shown in fig. 58 (japanese patent application laid-open No. 2005-199091).

Further, a technique is known in which a sewing window is formed in a cylindrical sewing frame, a processing cloth is attached to the sewing window through a lining cloth, the sewing frame is moved in the front-rear direction by a frame driving mechanism of an embroidery sewing machine, and the processing cloth is rotated about an axis in the front-rear direction to process an embroidery pattern.

Japanese patent application laid-open No. 2003-326049 discloses a device in which a sewing window long in the front-rear direction is formed in a cylindrical sewing frame, a lining cloth covering the sewing window is held by the sewing frame with a lining cloth pressing member longer than the sewing window, and a tubular processing cloth such as a sock or a wristband is attached to the lining cloth. Similar frames are also described in japanese patent laid-open No. 2004-91974.

In japanese patent application laid-open No. 7-109660, a device is described in which a sewing frame short in the front-rear direction is supported from the inside by a cylindrical inner frame, and the bouncing and deformation of a hat held by the sewing frame are suppressed.

Japanese patent application laid-open No. 2004-49548 discloses a sewing machine in which a cylindrical frame is divided into a pair of front and rear cylindrical elements, a sewing window opened substantially over the entire circumference is formed between the front and rear cylindrical elements, and the length of the sewing window is made to be flexible by adjusting the position of one of the elements in the front-rear direction.

In the case of the structure shown in fig. 58, there is no particular problem in the case where the length L0 extending in the front-rear direction of the sewing frame 880 is sufficiently short as shown in fig. 58, but there is a case where the length L0 is desired to be increased depending on the conditions of the material to be sewn and the like. However, in this case, since the sewing frame 880 is supported only at the rear end thereof in a single column shape, there is a problem that the front end which is not supported hangs down, and therefore, it is practically difficult to make the length L0 of the sewing frame 88 equal to or longer than a certain length.

Therefore, the main object of the present invention is to make the front end of the sewing frame difficult to hang downward.

In the sewing frame of japanese patent application laid-open No. 2003-326049 or japanese patent application laid-open No. 7-109660, since the embroidery range of the processed cloth is determined by the size of the sewing window, when a large embroidery pattern having a long length direction and a large width direction is processed on a long cylindrical processed cloth such as jeans, the sewing window is increased in accordance with the size of the embroidery pattern. However, if the sewing window is enlarged in the conventional tubular frame, it is necessary to reinforce the reduction in the holding force of the processing cloth, and therefore, there is a problem that the processing cloth is attached to the lining cloth by providing the lining cloth (packing paper) on the sewing frame. Further, when a heavy and long sewing product such as jeans and golf bags is processed, since the sewing frame is lengthened, there is a problem that the front end of the cylindrical frame sags due to the weight of the sewing frame and the sewing product, and the processing accuracy of the embroidery pattern is lowered.

Accordingly, an object of the present invention is to provide a sewing frame which can expand an embroidery range without lowering a holding force of a processing cloth, can save a lining cloth, can easily attach the processing cloth, can prevent front drooping of the sewing frame, and can process an embroidery pattern with high accuracy on a long cylindrical processing cloth.

Further, in the sewing frame disclosed in japanese patent application laid-open No. 2003-326049, since only the front and rear ends of the interlining pressing member are held by the sewing frame, if the interlining pressing member is lengthened, the holding force of the interlining is insufficient in the vicinity of the middle of the sewing window, and there is a problem that the interlining is deformed by the impact at the time of needle drop, the processed cloth is loosened and wrinkled, and the processing accuracy of the embroidery pattern is deteriorated.

Therefore, an object of the present invention is to prevent deformation of a lining cloth covering a sewing window in a long sewing frame in which the sewing window is formed long in the front and rear direction on the sewing frame, and to improve the processing accuracy of an embroidery pattern.

Further, according to the sewing frame disclosed in japanese unexamined patent publication No. 2003-326049, since the sewing window is formed in the peripheral wall of the sewing frame, in the case where an embroidery pattern is long in the longitudinal direction of a long tubular processed fabric, for example, sleeves of a jacket or trousers (jeans), it is necessary to replace the entire tubular frame. The cylindrical frame of jp 2004-49548 a can adjust the length of the sewing window, but since the sewing window is largely opened in the circumferential direction of the cylindrical frame, there is a problem that the holding force of the long cylindrical processing cloth is insufficient and is not suitable for practical use, for example, when an embroidery pattern is processed in a slender manner on a part of the long cylindrical processing cloth in the width direction.

Accordingly, an object of the present invention is to provide a sewing frame for embroidery which can accurately process an embroidery pattern having a plurality of patterns in the longitudinal direction and the width direction of a long cylindrical processed cloth.

In addition, in the sewing frame of japanese patent application laid-open nos. 2003-326049 and 2004-91974, since the sewing window is formed in a rectangular shape in addition to the above-described weight problem at the time of sewing the frame, for example, in the case of processing a deformed sewing product in which a part of the boot pants or the like becomes thin, it is necessary to use a sewing frame having a diameter that can be inserted into the thin part (narrow part). However, when a large pattern is formed on a thick portion (wide portion) of a sewn product, the width of the sewing window is insufficient, and therefore, it is necessary to replace the sewing window with a sewing frame having a large width and a large diameter. Therefore, there is a problem that two kinds of bobbin frames must be prepared for one kind of sewn product. Further, since the embroidery range of the tubular processed cloth is curved and stretched in a cylindrical surface of the sewing window, it is difficult to sew a border, a metal decorative sheet, and the like, and the embroidery method is limited.

Accordingly, an object of the present invention is to provide a sewing frame capable of efficiently processing embroidery patterns having different sizes in a narrow width portion and a wide width portion of a long processing cloth by using a light sewing frame. Further, a sewing frame capable of efficiently processing embroidery patterns on a tubular processing cloth by using a light flat-plate-shaped sewing frame and corresponding to various embroidery methods is provided.

Disclosure of Invention

In order to achieve the above-mentioned object, a sewing frame of a sewing machine according to the present invention has supported portions at front and rear ends thereof, which are supported by front and rear frame side portions of a rectangular frame-shaped support frame so as to be laterally displaceable. However, the lateral displacement means that at least a part of the sewing frame can be displaced in the lateral direction, and more specifically, a case where the sewing frame in a flat frame shape can be moved in parallel in the lateral direction, or a case where the upper portion of the sewing frame in a cylindrical frame shape, which extends and holds the object to be sewn in the upper portion, can be displaced in the lateral direction in accordance with the rotation of the frame, and the like can be exemplified. In addition, these cases are also the same in the following description.

The sewing frame driving mechanism of the sewing machine of the invention is provided with a supporting mechanism which can support the front end and the rear end of the sewing frame stretching and holding the sewed object in a manner of moving horizontally on the front frame side part and the rear frame side part of the rectangular frame-shaped supporting frame which moves horizontally but does not move horizontally.

The sewing frame driving mechanism is not particularly limited, but preferably includes a front droop prevention mechanism for preventing the front frame side portion of the support frame from drooping downward with respect to the rear frame side portion. The front sagging prevention mechanism is not particularly limited, but preferably includes left and right projecting portions of the table (located on the left and right of the recessed portion) which project forward relatively by providing the recessed portion recessed rearward from the front edge of the table, and left and right frame side portions of the support frame which are mounted on the left and right projecting portions so as to be displaceable forward and backward. Further, a sliding member for reducing sliding friction is preferably attached between the left and right projecting portions and the left and right frame side portions.

The sewing frame driving mechanism is not particularly limited, but preferably includes a guide mechanism for guiding the forward and backward displacement of the support frame so as not to be laterally displaceable and preventing the support frame from rocking in the lateral direction. The guide mechanism is not particularly limited, but preferably includes both left and right inner end surfaces of a concave portion recessed rearward from the front edge of the table, and guide rollers attached to left and right frame side portions of the support frame and rotatably brought into contact with the inner end surfaces.

The guide mechanism is not particularly limited, but preferably includes a position adjustment mechanism for adjusting the position of the guide roller to the left and right. Preferably, the guide roller is attached to a front portion of a protruding member that fixes the substrate to the support frame and has a front portion protruding into the frame of the support frame, and the position adjustment member is formed by combining a long hole that penetrates a base portion of the protruding member and extends in the left-right direction and a screw that fixes the long hole to the support frame.

The sewing frame driving mechanism is better used under the condition that the front-back length of the sewing frame is more than or equal to 30cm, and is better used under the condition of 50-100 cm. Since the longer the length, the more the necessity of the drive mechanism increases, the reason for setting the upper limit is that it is not practical in the case of being too long.

The material to be sewn is not particularly limited, but various pants such as jeans and twill pants are exemplified.

When the sewing frame is cylindrical, the sewing frame includes a cylindrical inner frame inserted into the inner side of the sewing frame and supported by the rear frame side of the support frame in a non-rotatable manner, a supported portion supported by the front frame side of the support frame is provided at the front end of the inner frame, and an opening having a size allowing a hand of an operator to enter the inner frame is formed at the front end of the inner frame.

The sewing frame driving mechanism supports the front and rear ends of the plurality of sewing frames on the front and rear frame sides of the support frame through the support mechanism, and supports the left and right middle portions of the front frame side of the support frame through the front frame side support mechanism in a manner of being capable of moving forward and backward and not drooping forward.

The front frame side support mechanism is not particularly limited, but preferably includes a support shaft which is provided to be displaceable in the front-rear direction together with the support frame, and which extends in the front-rear direction with its front end supporting the left and right intermediate portions. With such a structure, the front end of the support shaft that directly supports the support frame does not protrude forward beyond the support frame, and therefore the front frame side support mechanism as a whole is less likely to be an obstacle.

The rear end of the support shaft is not particularly limited, but is preferably connected to the right and left intermediate portions of the rear frame side portion of the support frame. With such a structure, the support shaft is more stable.

The front frame edge supporting mechanism includes a supporting frame fixed to the frame of the sewing machine, a supporting shaft capable of being displaced back and forth on the supporting frame, a supporting part capable of supporting the left and right middle parts of the front frame edge at the front end of the supporting shaft, and a vibration-proof member contacting at least the upper surface of the supporting shaft and limiting the vibration of the shaft at the front end of the supporting frame.

The vibration prevention member is not limited to a specific member, but for example, a sliding contact member slidably contacting the support shaft or a rolling member rotatably contacting the support shaft may be used. The sliding contact member or the rolling member may be brought into contact with the upper surface of the support shaft to regulate the vertical vibration of the shaft from one side. Further, the sliding contact member or the rolling member may be brought into contact with the upper and lower surfaces of the support shaft, and the vertical vibration of the shaft may be regulated from both sides.

The front frame side support mechanism may further include a coupling member coupled to a left-right intermediate portion of the front frame side, and a support member that supports the coupling member on a lower side of the support frame so as to be displaceable in the front-rear direction. The support member may be connected to the sewing machine frame, may be provided on the floor surface, or may be supported on both the sewing machine frame and the floor surface. Further, it is preferable that the support member is provided so as to be adjustable in height.

The sewing frame may be in the following various forms.

[A] The sewing frame is a cylinder shape with long front and back directions, and comprises a cylindrical inner frame with long front and back directions inserted into the inner side of the sewing frame, a sewing window which determines the embroidery range of the processing cloth is formed on the sewing frame with long front and back directions, a connecting part connected with a rotary driving mechanism on the supporting frame is arranged at the back end of the sewing frame, a needle hole penetrated by a sewing needle of the embroidery machine is formed on the peripheral wall of the inner frame with long front and back directions, an installation part of a fixed part installed on the supporting frame is arranged at the back end of the inner frame, and a supporting part of the front frame supported on the supporting frame is arranged at the front end of any one of the sewing frame or the inner frame.

[B] The sewing frame is cylindrical, a sewing window for determining the embroidery range of the processing cloth is formed on the sewing frame, a lining cloth pressing component for supporting the processing cloth along the outer surface of the sewing frame through lining cloth covering the sewing window and pressing the lining cloth to the sewing frame is provided, and a pressing component for keeping the front end and the rear end of the lining cloth pressing component on the sewing frame in the front and the rear of the sewing window and pressing the middle part of the lining cloth pressing component to the sewing frame at the middle position of the sewing window in the length direction.

Here, the lining cloth pressing member is not limited to a specific member, and for example, a belt-like member, a rod-like member, a rigid member, an elastic member, or the like having a length substantially equal to that of the sewing frame may be used. The sewing machine may be implemented by providing two left and right lining cloth pressing members on the left and right sides of the sewing frame. In order to easily re-cover the lining cloth, either one of the front and rear ends of the lining cloth pressing member may be fixedly held by the sewing frame, and the other end may be held so as to be openable and closable with respect to the sewing frame.

The pressing member is not limited to a specific member, but for example, a member that presses the lining cloth pressing member against the sewing frame by its own elasticity, a member that presses the lining cloth pressing member against the sewing frame by the attraction force of a magnet, or the like may be used. When the lining cloth is covered again, in order to easily release the pressing force of the lining cloth pressing component, the pressing component can be movably arranged on the sewing frame at the acting position and the non-acting position. Specifically, the pressing member may be rotatably or slidably attached to the sewing frame and disposed at an operating position overlapping the lining cloth pressing member and a non-operating position spaced apart from the lining cloth pressing member. The number of the pressing members is not particularly limited, and may be one or more.

[C] The sewing frame has a base frame mounted on a frame driving device of the embroidery sewing machine and a cloth hanging frame for pasting the long cloth in the front-back direction of the processed cloth, a front side supporting part for supporting the front end part of the cloth hanging frame and a back side supporting part for supporting the back end part of the cloth hanging frame are arranged on the base frame, a sewing window for determining the embroidery range of the processed cloth is formed between the front end part and the back end part of the cloth hanging frame, and a plurality of cloth hanging frames (in a state of being bridged between the front side supporting part and the back side supporting part of the base frame) with different shapes of the sewing window are replaceably mounted on the base frame.

Here, the base frame and the cloth hanging frame preferably have the following configurations.

(a) The base frame has a front element attached to a front portion of the frame driving device and a rear element attached to a rear portion of the frame driving device, the front element is provided with a front support portion for supporting a front end portion of the sheet hanging frame, and the rear element is provided with a rear support portion for supporting a rear end portion of the sheet hanging frame. In this way, the base frame can be attached to the frame driving device in a state of being supported on both sides, and a heavy long cylindrical processed cloth such as pants (jeans) can be supported in a stable posture on a horizontal plane.

(b) Cylindrical surfaces having substantially the same diameter are formed on the front and rear elements of the base frame and the sheet hanging frame, and the overall shape of the sewing frame when the sheet hanging frame is attached to the base frame is cylindrical. There is an advantage that a tubular sewing frame can precisely machine a long and thin embroidery pattern on a long and thin tubular workpiece cloth, for example, a sleeve of trousers or a jacket.

(c) The front element and the rear element of the base frame are connected by the connecting element, the cloth hanging frame is provided with a joint part which is jointed with the connecting element through the left side and the right side of the sewing window, and an opening part which opens the joint part left and right, and the cloth hanging frame is covered on the base frame through the opening part. In this case, the sheet hanging frame can be easily attached to and detached from the base frame, and the weight can be reduced without reducing the rigidity of the sheet hanging frame.

(d) The front side element and the rear side element of the base frame are separated, the cloth hanging frame is formed into a cylinder shape with the whole circumference closed, the front end part of the cloth hanging frame is installed on the front side element of the base frame, and the rear end part of the cloth hanging frame is installed on the rear side element of the base frame. In this case, sufficient rigidity can be secured in the sheet hanging frame, and the sewing window can be largely changed in the circumferential direction of the sheet hanging frame.

[D] The sewing frame is a flat plate shape with a long front-back direction, a sewing window with a long front-back direction for determining (dividing) the embroidery range of the processing cloth and a reinforcing rib extending along the long edge of the sewing window are arranged on the sewing frame, a narrow width part is formed on one side of the front side and the back side of the sewing window, and a wide width part is formed on the opposite side.

In this sewing frame, the following method is preferably employed.

(a) A narrow front portion and a wide rear portion are provided on a sewing frame, a narrow portion of a sewing window is formed in the front portion, and a wide portion of the sewing window is formed in the rear portion.

(b) The reinforcing ribs are arranged on the left and right side edges of the sewing frame in a downward direction, and cloth fixing pieces for fixing the processing cloth are arranged on a part of the reinforcing ribs in an outward protruding manner.

(c) The sewing frame is detachably provided with a positioning clamp, and the positioning clamp is provided with a positioning part aiming at the sewing frame and an opening part for indicating the position of the sewing window from the upper side of the processing cloth.

[E] The sewing frame is a long and thin flat plate shape entering the cylindrical processing cloth, a long and thin sewing window for determining (dividing) the embroidery range of the cylindrical processing cloth is arranged on the sewing frame, and the periphery of the embroidery range of the cylindrical processing cloth is fixed on the upper surface of the sewing frame. The degree of "elongation" is, for example, preferably at least twice as long as the length in the longitudinal direction.

The following exemplary method can be used to fix the periphery of the embroidery range of the tubular processed cloth.

(1) The reinforcing rib is arranged downward at the left and right side edges of the sewing frame, the cloth fixing piece for fixing the processing cloth on a part of the reinforcing rib is arranged in an outward protruding way, and the periphery of the cylindrical processing cloth is fixed on the cloth fixing piece through a spring type open-close type clamp.

(2) The peripheral part of the cylindrical processing cloth is fixed on the sewing frame through the double-sided adhesive tape.

In this sewing frame, the following method is preferably employed.

(a) The sewing frame is detachably provided with a positioning clamp, the positioning clamp is provided with a positioning part aiming at the sewing frame and an opening part for indicating the position of the sewing window from the upper side of the processing cloth.

(b) The sewing frame is divided into a plurality of parts in the width direction or the length direction, and the parts are connected with each other in a position-adjustable manner, so that the sewing window can be stretched in the width direction or the length direction. In this case, the sewing window can be made to be stretchable in accordance with the change in shape between the rectangular shape and the trapezoidal shape.

(c) The sewing machine has a long and thin flat pressing frame for pressing the periphery of the embroidery range of the tubular processing cloth to the sewing frame, and the pressing frame is provided with a transmission window with the shape approximately the same as that of the sewing window of the sewing frame.

Effects of the invention

According to the invention described in claims one to seven, the front and rear ends of the sewing frame are supported by the front and rear frame side portions of the rectangular frame-shaped support frame, so that the front end of the sewing frame is less likely to hang downward (basic effect).

According to the eighth and subsequent inventions, the following effects are obtained in addition to the above-described basic effects.

According to the eighth aspect of the invention, since the opening portion is formed at the front end of the inner frame included in the sewing frame, the worker can easily replace the bobbin of the sewing machine head by reaching out from the opening portion in addition to the above-described basic effects.

According to the ninth and tenth aspects of the invention, the front end of the sewing frame is supported by the support frame, and the left and right intermediate portions of the support frame are supported so as not to hang down forward, whereby the front end of the sewing frame is further made less likely to hang down downward.

According to the eleventh aspect of the invention, the support frame fixed to the sewing machine frame is provided with the vibration preventing member which comes into contact with the support shaft, so that the vibration of the support shaft and the support frame can be suppressed, and the sewn object on the long sewing frame can be processed with high accuracy.

According to the twelfth aspect of the invention, the support member having the coupling member for coupling the support frame is supported from the lower side of the support frame, and thus, a heavy work to be sewn particularly on a long sewing frame can be accurately processed.

According to the thirteenth aspect of the invention, since the long inner frame is inserted into the long sewing frame and the inner frame has a double-inside and outside frame structure for supporting the processing cloth from the inside of the sewing window, the sewing window can be opened to a large extent in the longitudinal direction and the circumferential direction of the sewing frame without lowering the holding force of the processing cloth, and a sufficient embroidery range can be secured for large-pattern processing of the long cylindrical processing cloth, and the cloth hanging operation can be easily performed without using a backing cloth.

According to the fourteenth and fifteenth aspects of the invention, since the pressing member presses the intermediate portion of the lining cloth pressing member against the sewing frame, the holding force of the lining cloth in the vicinity of the middle of the sewing window is strengthened, and the looseness of the lining cloth can be reliably prevented. Therefore, even if the length of the lining cloth pressing member is increased during embroidering of the long cylindrical processing cloth, the processing cloth can be accurately held along the outer peripheral surface of the sewing frame to accurately process the embroidery pattern by preventing the deformation of the lining cloth.

According to the sixteenth aspect of the invention, since the base frame supports the sheet hanging frame at both front and rear end portions, the sewing window can be formed long over substantially the entire length of the sheet hanging frame. In addition, since the cloth hanging frame is replaceably attached to the base frame, the shape and the opening area of the sewing window can be accurately selected in accordance with the pattern of the embroidery pattern. Therefore, the embroidery pattern can be processed with high precision in the longitudinal direction and the width direction of the long cylindrical processing cloth in a plurality of patterns.

According to the seventeenth aspect of the present invention, since the sewing window is formed long in the front-rear direction on the flat-plate-shaped sewing frame, the weight of the sewing frame as a whole can be reduced as compared with the case of the cylinder frame when embroidering long-length cloth, and this is advantageous in terms of high-speed processing of an embroidery pattern. In addition, since the reinforcing rib is provided along the longitudinal edge of the sewing window, the deformation of the sewing frame can be prevented by the reinforcing rib, and the processing cloth can be accurately supported in the horizontal plane. Further, since the narrow width portion and the wide width portion are formed in the front and rear of the sewing window, when a special-shaped sewn product such as boots is processed, it is not necessary to replace the frame, and embroidery patterns having different sizes can be efficiently processed on different portions of the processed cloth by one sewing frame.

According to the eighteenth aspect of the invention, since the elongated sewing window is formed in the elongated flat-plate-shaped sewing frame, the embroidery range of the tubular processed cloth can be spread out flatly over the sewing window, and therefore, the embroidery method can be applied regardless of the embroidery method. In addition, when embroidering a tubular work cloth, the weight of the entire flat frame can be reduced as compared with the case of a tubular frame, which is advantageous in high-speed processing of an embroidery pattern.

Further, according to the nineteenth invention, the operator can easily match the position where sewing starts with the needle drop hole according to the contour of the opening of the positioning jig.

In addition, according to the twentieth aspect of the present invention, it is possible to apply one flat frame to cylindrical processed cloths having different thicknesses and embroidery ranges, and it is possible to secure the maximum embroidery range. Further, according to the twenty-first invention, in the case of processing a special-shaped sewn product such as booties by one flat frame, it is possible to cope without replacing the frame.

In addition, according to the twenty-second aspect of the invention, since the strength can be provided to any one of the sewing frame and the pressing frame, the structure on the side that affects the embroidery area can be simplified. Therefore, the present invention can be applied more easily to long tubular fabrics such as pants and arms.

Drawings

FIG. 1 is a plan view showing a multi-head sewing machine according to embodiment 1.

Fig. 2 is a perspective view showing the sewing frame of the embodiment.

Fig. 3 is a side cross-sectional view showing the sewing frame and its periphery of the embodiment.

Fig. 4 is a guide mechanism according to this embodiment, and (a) is a plan view, (b) is a front view, and (c) is a plan view showing a table.

FIG. 5 is a plan view showing a multi-head sewing machine according to embodiment 2.

Fig. 6 is a perspective view showing the sewing frame of the embodiment.

Fig. 7 is a side cross-sectional view showing the sewing frame and its periphery of the embodiment.

FIG. 8 is a perspective view showing a sewing frame of example 3.

Fig. 9 is a plan view showing a distal end portion of the sewing frame of the embodiment.

Fig. 10 is a sectional view of the sewing frame of the embodiment as seen from the X-X line of fig. 9.

Fig. 11 is a sectional view showing a front end supporting structure of the sewing frame of the embodiment.

Fig. 12 is a sectional view showing a rear end support structure of the sewing frame of the embodiment.

FIG. 13 is a plan view showing a sewing frame driving mechanism and its periphery in example 4.

Fig. 14 is a side view showing the rear frame support mechanism and its periphery according to example 4.

Fig. 15 is a side view showing the rear frame support mechanism, the front frame side support mechanism, and the periphery thereof according to example 4.

FIG. 16 is a plan view showing a multi-head sewing machine according to embodiment 5.

FIG. 17 is a plan view showing a multi-head sewing machine according to embodiment 6.

Fig. 18 is a sectional view taken along line XVIII-XVIII in fig. 17 showing the upper support mechanism of the sewing frame drive mechanism in embodiment 6.

Fig. 19 is a side view showing a modification of the upper support mechanism of embodiment 6.

FIG. 20 is a sectional view taken along line XX-XX in FIG. 17 showing the lower supporting mechanism of the sewing frame driving mechanism in example 6.

Fig. 21 is a front view of the main part of the lower support mechanism in example 6, as viewed from the line XXI-XXI in fig. 20.

Fig. 22 is a plan view showing the embroidery machine according to embodiment 7.

Fig. 23 is an exploded perspective view of a sewing frame according to example 7.

Fig. 24 is a sectional view showing a supporting structure of a rear end portion of the sewing frame of example 7.

Fig. 25 is a sectional view showing a supporting structure of a front end portion of a sewing frame of example 7.

FIG. 26 is a longitudinal sectional view of the sewing frame of example 7.

Fig. 27 is a sectional view showing another example of the supporting structure of the front end portion of the sewing frame according to example 7.

FIG. 28 is a plan view showing an embroidery sewing machine according to embodiment 8.

Fig. 29 is a perspective view showing a sewing frame of example 8.

FIG. 30 is a side view showing a sewing frame according to example 8.

FIG. 31 is a front view showing a sewing frame of example 8.

Fig. 32 is a sectional view showing the procedure for holding the interlining in the sewing frame of example 8.

FIG. 33 is a side view showing a sewing frame of example 9.

FIG. 34 is a cross-sectional view taken along line XXXIV-XXXIV of FIG. 33.

FIG. 35 is a plan view showing the embroidery sewing machine according to embodiment 10.

Fig. 36 is a perspective view of the sewing frame of embodiment 10.

FIG. 37 is a sectional view of the sewing frame of the embodiment 10.

FIG. 38 is a plan view of the sewing frame of this embodiment 10.

Fig. 39 is a perspective view showing a cloth hanging frame of the sewing frame of example 10.

Fig. 40 is a plan view showing another cloth hanging frame according to example 10.

FIG. 41 is a perspective view of a sewing frame of example 11.

Fig. 42 is a perspective view showing a cloth hanging frame of the sewing frame of example 11.

FIG. 43 is a perspective view showing a sewing frame of example 12.

FIG. 44 is a plan view showing an embroidery sewing machine according to embodiment 13.

FIG. 45 is a cross-sectional view of the XLV-XLV line of FIG. 44.

Fig. 46 is a perspective view showing a sewing frame of example 13.

FIG. 47 is a plan view of the sewing frame of this example 13.

FIG. 48 is a cross-sectional view of XLVIII-XLVIII lines of FIG. 47.

Fig. 49 is a plan view illustrating a procedure of attaching a long cylindrical processed cloth to a sewing frame of example 13.

FIG. 50 is a plan view of the embroidery sewing machine to which the sewing frame of example 14 is attached.

FIG. 51 is a sectional view taken along the line LI-LI of FIG. 50.

Fig. 52 is a perspective view showing a sewing frame of example 14.

FIG. 53 is a plan view of the sewing frame of example 14.

Fig. 54 is a sectional view taken along the LIV-LIV line of fig. 53.

Fig. 55 is a plan view of modification 1 of example 14.

Fig. 56 is a plan view of modification 2 of example 14.

Fig. 57 shows a modification 3 of example 14, in which (a) is a plan view and (b) is a side view.

Fig. 58 is a plan view showing a sewing frame and a driving mechanism thereof according to a conventional example.

Detailed Description

[ example 1 ]

In the embodiment 1 shown in fig. 1 to 4, the multi-head sewing machine 1 includes a table 6 having a recess 6h recessed from the front to the rear in the center of the left and right sides, a plurality of sewing heads (not shown) arranged in parallel in the left and right directions above the recess 6h, a bed 7 arranged in parallel at a needle drop point P of the sewing heads, a sewing frame 8 between the sewing heads and the bed 7 for stretching and holding a workpiece (not shown), a sewing frame driving mechanism 10 for supporting the sewing frame 8 so as to be displaceable in the front-rear left-right plane direction, a front-rear driving device 51 for driving the sewing frame 8 in the front-rear direction, and a left-right driving device 52 for driving the upper part of the sewing frame 8 in the left-right direction, and the sewing frame 8 stretches and holds the workpiece by rotating the sewing frame 8. These components are directly or indirectly attached to a sewing machine frame 1f serving as a base of the multi-head sewing machine 1.

Each bed 7 is provided so as to protrude from the sewing machine frame 1f on the rear side of or below the recessed portion 6h into or below the recessed portion 6h, and an inner frame 9 inserted inside the sewing frame 8 is inserted into the bed 7. The inner frame 9 is a tubular frame having both ends open, and the rear end is supported in a non-rotatable manner on a rear frame edge 11a of a support frame 11 provided in the sewing frame drive mechanism 10. A slit hole 9h is formed in an upper portion of the inner frame 9 to be elongated in the front-rear direction, and a needle drop point P on the bed 7 is always exposed when the inner frame 9 is displaced in the front-rear direction through the slit hole. The inner frame 9 can be displaced forward and backward together with the sewing frame 8.

The sewing frame 8 is a bottomed tubular frame having an end face 8e at the tip, and is externally fitted to the inner frame 9 so as to be slidable in the circumferential direction. A sewing window 8h for extending and holding a material to be sewn (not shown) between a sewing machine bed (not shown) and a needle drop point P is provided through an upper portion of the sewing frame 8. Further, a stem 8b as a supported portion for rotatably supporting the front frame side portion 11b of the support frame 11 is provided at the front end of the sewing frame 8 so as to protrude forward from the center portion of the end surface 8e, and an engaging portion 8a as a supported portion for rotatably supporting the rear frame side portion 11a is provided at the rear end portion. The length L1 of the sewing frame 8 in the front-rear direction when installed in the multi-head sewing machine 1 is 70-80 cm without including the shaft 8 b.

The sewing frame driving mechanism 10 includes a rectangular frame-shaped support frame 11 for supporting a plurality of sets of sewing frames 8 and inner frames 9 in parallel in the frame, a rear end support mechanism 12 for rotatably connecting and supporting the rear end of the sewing frame 8 to the rear frame edge 11a of the support frame 11, a front end support mechanism 17 for rotatably connecting and supporting the front end of the sewing frame 8 to the front frame edge 11b of the support frame 11, an engaging mechanism 22 for engaging the rear frame edge 11a of the support frame 11 to the bed 7 so as to be movable forward and backward, a front droop preventing mechanism 32 for preventing the front frame edge 11b of the support frame 11 from drooping downward with respect to the rear frame edge 11a, and a guide mechanism 42 for guiding the forward and backward displacement of the support frame 11 so as not to be movable leftward and rightward so as to prevent leftward and rightward swinging.

Since the rear frame side portion 11a of the support frame 11 is supported by the front-rear driving device 51 so as to be drivable forward and rearward, the rear frame side portion 11a functions as a driving frame for driving the sewing frame 8 forward and rearward. Further, a left-right driving device 52 is provided on the rear frame side portion 11 a. On the other hand, the front frame side portion 11b and the left and right frame side portions 11c and 11d of the support frame 11 function as a front end support frame for supporting the front end of the sewing frame 8. The front frame side 11b is connected to the front ends of the left and right frame sides 11c and 11d via a connecting portion 11x so as to be replaceable.

The rear end support mechanism 12 includes a vertical plate 13 hanging downward from the rear frame side portion 11a, a circular drive ring 14 supporting the base end (engaging portion 8a) of the sewing frame 8, and a plurality of support rollers 15 rotatably sandwiching the drive ring 14 from the outer peripheral side thereof. The vertical plate 13 has a shaft hole (not shown) for inserting the base 7 through the center portion, and supports the rear end of the inner frame 9 on the outer side thereof in a non-rotatable manner. On the other hand, the front end support mechanism 17 includes a stem 8b provided at the front end of the sewing frame 8, and a support portion 18 projecting downward from the front frame side portion 11b and rotatably supporting the stem 8 b.

The engaging mechanism 22 has an upper engaging portion 23 formed on the upper portion of the base 7 and its periphery, and a lower engaging portion 26 formed on the lower portion of the base 7 and its periphery. The upper engaging portion 23 includes an upper guide groove 24 recessed in an upper portion of the housing 7 in a longitudinally elongated manner, and a guided member 25 attached to the rear frame edge portion 11a and engaged with the upper guide groove 24 so as to be displaceable in the forward and backward directions. On the other hand, the lower engaging portion 26 includes a lower guide groove 27 recessed in a lower portion of the housing 7 in a longitudinally elongated manner, and a guided member 28 attached to the vertical plate 13 of the rear end support mechanism 12 and engaged with the lower guide groove 27 so as to be displaceable in the forward and backward directions.

The front droop prevention mechanism 32 includes left and right projecting portions 33 of the table 6 which are recessed in the table 6 to project forward relatively and located on the left and right of the recess 6h, felt 34 as a sliding member which is attached to the left and right projecting portions 33 in a longitudinally elongated manner along the recess 6h and which reduces sliding friction, and left and right frame side portions 11c and 11d of the support frame 11 which are placed on the felt 34.

The guide mechanism 42 includes guide surfaces 43 formed on both left and right end surfaces of the recess 6h and extending in the front-rear direction, a protruding member 44 having a base fixed to the support frame 11 and a front portion protruding into the support frame 11, and guide rollers 45 supported on the front portion of the protruding member 44 and rollably contacting the guide surfaces 43. Accordingly, in the guide mechanism 42, the guide rollers 45 come into contact with the guide surfaces 43 facing each other, thereby preventing the support frame 11 from being laterally skewed or displaced.

The projecting member 44 has a base portion 44a attached to the upper surface of the support frame 11, and a curved portion 44c formed at an intermediate position between the base portion 44a and the front portion 44b so as to curve downward from the base portion 44a side toward the front portion 44b side and to match the height level of the front portion 44b with the lower height level of the upper surface of the support frame 11. The guide roller 45 is rotatably supported by a rotary shaft 45x projecting downward from the lower surface of the front portion 44b of the projecting member 44. In addition, the number of the guide rollers 45 and the projecting members 44 supporting them is one on each of the right and left sides in this embodiment 1.

The guide mechanism 42 includes a position adjustment mechanism 46 for adjusting the position of the guide roller 45 to the left and right, and the position adjustment mechanism 46 includes a long hole 47 extending to the left and right through a base portion 44a of the protruding member 44, and a screw 48 for fixing the long hole 47 to the left and right frame side portions 11c and 11 d.

The plurality of front-rear driving devices 51 are provided above the rear frame side portion 11a in a longitudinally elongated manner, and support the rear frame side portion 11a so as to be drivable from above in the front-rear direction. The left-right driving device 52 is provided on the rear frame side portion 11a in a laterally elongated manner, and rotates all the sewing frames 8 by rotating the driving ring 14.

According to embodiment 1, the front and rear ends of the sewing frame 8 are supported by the front and rear frame side portions 11b and 11a of the support frame 11, whereby the sewing frame 8 can be made less likely to shift vertically and horizontally with respect to the support frame 11. Further, the support frame 11 supporting the sewing frame 8 can be made less likely to hang downward by providing the front hanging prevention mechanism 32, and the support frame 11 can be made less likely to shift to the left and right by providing the guide mechanism 42. Therefore, the sewing frame 8 is less likely to be displaced in the vertical and horizontal directions with respect to the support frame 11, and the support frame 11 is less likely to hang downward and is less likely to be displaced in the horizontal directions, whereby the sewing frame 8 is less likely to hang downward and is less likely to be displaced in the horizontal directions. Accordingly, the quality of the sewn article can be improved.

Further, since the guide mechanism 42 guides the displacement of the support frame 11 along the inner surface of the recess 6h of the table 6, a dedicated guide rail or the like is not required, and therefore, the structure is simplified and the cost is reduced. Further, since the sewing frame 8 is supported by two points, the sewing frame 8 can be made compact.

In addition, the number of the guide roller 45 and the protruding member 44 supporting it may be increased to three, four, or the like, instead of one on both sides to two in total.

Instead of providing the end face 8e and the stem 8b at the front end of the sewing frame 8 and rotatably supporting the stem 8b, the stem may be non-rotatably supported by providing an end face and the same stem at the front end of the inner frame 9, and the front end of the sewing frame 8 may be rotatably supported by the inner frame 9.

[ example 2 ]

In example 2 shown in fig. 5 to 7, a sewing frame 68 having a length L2 in the front-rear direction of 70 to 80cm in the flat frame shape is attached instead of the cylindrical sewing frame 8, and a rear end support mechanism 72 and a front end support mechanism 77 for the flat frame are provided instead of the rear end support mechanism 12 and the front end support mechanism 17 for the cylinder frame, which is accompanied therewith, different from example 1. Since the other structures are substantially the same as those of embodiment 1, the description of embodiment 1 will be applied.

The front end support mechanism 77 is replaced by removing the front frame side portion 11b by operating the connecting portion 11x and attaching the front frame side portion 71b having the front end support mechanism 77 instead.

The rear end support mechanism 72 includes a rear end portion 68a of the sewing frame 68 as a supported portion supported by the rear frame side portion 11a so as to be laterally displaceable, and a rear end support member 73 connecting the rear end portion 68a to the left and right driving device 52 and supporting the same so as to be laterally drivable.

The front end support mechanism 77 includes a front end portion 68b of the sewing frame 68 as a supported portion supported by the front frame side portion 71b so as to be laterally displaceable, and a front end support portion 78 projecting rearward from the front frame side portion 11b, and a front end support member 79 having a rear end portion attached to the front end portion 68b of the sewing frame 68, and holding the rear end portion of the front end support portion 78 in a vertically slidable manner at the front end portion, and a felt 80 for reducing sliding friction is attached between the rear end portion of the front end support portion 78 and the front end portion of the front end support member 79 holding the front end support portion 78 therebetween.

According to embodiment 2, the flat frame-shaped sewing frame 68 can be supported instead of the cylinder frame only by replacing a part of the sewing frame driving mechanism 10 of embodiment 1. Thus, as in example 1, the front drooping of the sewing frame 68 can be reliably prevented.

[ example 3 ]

In embodiment 3 shown in fig. 8 to 12, a supported portion supported by the support frame 11 is provided at the front end of the inner frame 9 of the sewing frame 8, which is different from embodiment 1. A needle cylinder 2 is built in the front end of the sewing machine bed 7, and a bobbin 3 around which a lower thread is wound is accommodated inside the needle cylinder 2.

The sewing frame 8 is formed in a long cylindrical shape with both front and rear ends open (see fig. 8). A ring 8b supported by the rollers 81 of the inner frame 9 is fixed to the inner periphery of the front end of the sewing frame 8.

A cup-shaped mounting member 9a is provided at the rear end of the inner frame 9 and is fixedly supported by the vertical plate 13 of the rear end support mechanism 12 by a screw 85 (see fig. 12). An end plate 9b is fixed to the front end of the inner frame 9 so as to face the ring 8b from the front (see fig. 11).

A pair of left and right rollers 81 engaging with the inner peripheral edge of the ring 8b are provided on the upper portion of the end plate 9b, and the front end of the sewing frame 8 is rotatably supported around the cylindrical axis of the inner frame 9 by the rollers 81. Between the pair of rollers 81, a bracket 82 as a supported portion on the front end side of the sewing frame 8 is attached to the end plate 9b so as to project forward in parallel with the cylindrical axis of the inner frame 9. Then, an opening 83 having a size such that a hand of a worker enters the inner frame 9 is formed in the end plate 9b below the bracket 82.

The bracket 82 is attached at its base end to the end plate 9b by a bolt 84 (see fig. 12), and is supported at its tip end by a front frame side portion 11b of the support frame 11 by a stay 86. The front frame side 11b has a nut 87 at the mounting position of the sewing frame 8, and the stay 86 is mounted to the front frame side 11b by a bolt 88 with a handle screwed to the nut 87. A U-shaped groove 90 that engages with the positioning projection 89 of the front frame side portion 11b is formed at the upper end of the stay 86, and ribs 91 are formed on both the front and rear surfaces of the stay 86.

A support piece 92 is provided at the lower end of the support 86 so as to project rearward, and a plate spring 93 for pressing the front end of the bracket 82 against the support piece 92 is attached to the upper surface of the support piece 92. A through hole 94 having a width substantially equal to that of the leaf spring 93 is formed in the front end portion of the bracket 82, and the bracket 82 is supported by the support 86 at a predetermined position in the left-right direction by the engagement of the through hole 94 and the bent portion 93a of the leaf spring 93. Further, a plurality of cushioning materials 95 are bonded to the end plate 9b of the inner frame 9 on the surface facing the ring 8b of the sewing frame 8.

According to the sewing frame 8 of embodiment 3, since the supported portion provided at the front end of the inner frame 9 is supported by the support frame 11, the front drooping of the sewing frame 8 can be reliably prevented, as in embodiment 1. Further, as in example 1, since the inner frame 9 covers the sewing window 8h of the sewing frame 8 from the inside and supports the object to be sewn through the cylindrical surface extremely close to the cylindrical surface of the sewing frame 8, the sewing window 8h can be opened widely, and a large embroidery pattern can be processed with high accuracy over a wide range of the object to be sewn such as twill pants. Further, since the opening 83 is formed at the front end of the inner frame 9, there is an advantage that, when replacing the bobbin, the worker can easily attach and detach the bobbin 3 to and from the cylinder 2 to and from the sewing machine bed 7 by inserting his hand into the inner frame 9 through the opening 83 (see arrow in fig. 11) while the sewing frame 8 is retracted.

[ example 4 ]

Embodiment 4 shown in fig. 13 to 15 is different from embodiment 1 in that the left and right intermediate portions of the front frame side portion can be supported by the front frame side portion support mechanism so as to be displaced forward and backward without sagging forward. Since the other structures are substantially the same as those of embodiment 1, the description of embodiment 1 will be applied.

The plurality of front-rear driving devices 51 are arranged in parallel in the left-right direction, and each front-rear driving device 51 includes a support frame 51f extending in the front-rear direction, a support rail 51a provided on the support frame 51f and extending in the front-rear direction, and a rear frame connecting member 51b connecting the rear frame edge portion 11a to be displaceable in the longitudinal direction of the support rail 22 and supported by the support rail 22.

The front frame side support mechanism 120 is provided with the front-rear drive device 51 extending further forward in front and in front of the front-rear drive device 51 positioned at the center of the left and right, and the rear portion of the front frame side support mechanism 120 overlaps with the front portion of the front-rear drive device 51. More specifically, the front frame side support mechanism 120 includes a support frame 122 having a support frame 51f provided so as to extend further forward, a support rail 121 having a support rail 51a provided on the support frame 122 so as to extend further forward, a front frame side support member 131 having a left and right substantially central portion at a front end thereof for supporting the front frame side 11b, a support shaft 123 having a rear end connected to the left and right substantially central portion of the rear frame side 11a via a rear frame connecting member 51b, and a front frame support member 128 having a front and rear intermediate portion of the support shaft 123 connected to the support rail 121 so as to be displaceable in a longitudinal direction of the support rail 121.

The front-rear driving device 51 drives the support frame 11 forward and backward by driving the rear frame coupling member 51b and the front frame support member 128 forward and backward. The left-right driving device 52 is provided on the rear frame side portion 11a, and is configured to rotationally drive the sewing frame 8 by rotationally driving the driving ring 14 of the rear end support mechanism 12.

According to embodiment 4, since the rear frame side portion 11a and the left and right frame side portions 11c and 11d of the support frame 11 are supported by the front-rear driving device 51 and the front droop preventing mechanism (left and right frame supporting mechanism) 32 so as to be displaceable in the front-rear direction, and the front frame side portion 11b is supported by the front frame side portion supporting mechanism 120 so as to be displaceable in the front-rear direction, when the front ends of the support frame 11 and the left and right projecting portions 33 project more forward than they do, as shown in fig. 13, the front frame side portion 11b is made difficult to droop downward with respect to the rear frame side portion 11a, and therefore, the front end of the sewing frame 8 supported by the support frame 11 is also made difficult to droop downward with respect to the rear end. Therefore, the sewing frame 8 is smoothly driven, and the quality of the sewed object is excellent. In addition, according to the above configuration, since the front end of the support shaft 123 that directly supports the front frame side portion 11b does not protrude forward from the front frame side portion 11b, the front frame side portion support mechanism 120 has good accommodation performance as a whole and is less likely to cause an obstacle.

When the number of the sewing machine heads 4 is increased, the number of the front frame side support mechanisms 120 may be increased.

[ example 5 ]

In example 5 shown in fig. 16, a flat plate-like sewing frame 68 similar to that of example 2 is attached, and a rear end support mechanism 72 and a front end support mechanism 77 are provided, which is different from example 4. Since the other structures are substantially the same as those of embodiment 4, the description of embodiment 4 will be applied. Also in embodiment 5, the front drooping of the sewing frame 68 can be reliably prevented.

[ example 6 ]

In example 6 shown in fig. 17 to 21, the sewing frames of the number larger than that of example 4 and the support frames 11 longer in the left and right direction than that of example 4 are provided, and since the plurality of sewing frames 8 are supported without sagging forward, one lower front frame side support mechanism is provided in addition to the two upper front frame side support mechanisms. Since the other structures are substantially the same as those of embodiment 4, the description of embodiment 4 will be applied.

The upper front frame side support mechanism 120 has substantially the same configuration as that of the front frame side support mechanism of embodiment 4, and the support frame 122 and the support frame 51f are formed to be long in the front-rear direction, and the rear end is attached to the rear cross member 104 of the sewing machine frame 1f via the bracket 105, and the middle portion is attached to the front cross member 106 via the bracket 107. A switch box 124 is provided on the front end of the support frame 122, and a start/stop switch 125 and an emergency stop switch 126 of the multi-head sewing machine 1 are provided on the front. In addition, the switches 125, 126 are provided at positions that can be reached by the hands of the operator standing in front of the sewing machine 103 when the support frame 11 is displaced to the forefront.

The belt 112 of the front-rear drive device 51 and the support rails 51a and 121 are provided between the front and rear ends of the support frame 122, and the rear end of the support frame 122 supports the shaft 114 for rotating a drive pulley (not shown) of the belt 112. A front frame side support member 131 is provided at the front end of the support shaft 123, and the left and right intermediate portions of the front frame side 11b of the support frame 11 are supported by the member 131.

A vibration isolator 132 made of a hard resin block is attached to the lower surface of the distal end of the support frame 122 so as to be in sliding contact with the upper surface of the support shaft 123. Then, the support shaft 123 is displaced forward and backward integrally with the support frame 11 in accordance with the rotation of the belt 112, and the vibration isolator 132 restricts and guides the vibration of the support shaft 123 from above, thereby holding the shaft 123 in a horizontal plane. Therefore, according to the upper front frame side support mechanism 120, the support frame 11 can be prevented from drooping forward by the support frame 122 and the support shaft 123, and the vibration of the support frame 11 can be suppressed by the vibration isolator 132, whereby the sewing object can be embroidered on the long sewing frame 8 with high accuracy.

Further, as the vibration isolator, a rolling member shown in fig. 19 may be used instead of the sliding contact member shown in fig. 18. The vibration isolator 133 shown in fig. 19(a) has a bracket 134 on the front end surface of the support frame 122, and a roller 135 is supported on the bracket 134, and the roller 135 rolls in contact with the upper surface of the support shaft 123, thereby restricting the vibration of the support shaft 123 from above. The vibration isolator 136 shown in fig. 19(b) is configured such that a pair of upper and lower rollers 138 and 139 are provided on a bracket 137, and the rollers 138 and 139 are configured to restrict vibration of the support shaft 123 from both the upper and lower sides in a state where the support shaft 123 is sandwiched therebetween.

On the other hand, as shown in fig. 20 and 21, the lower front frame side support mechanism 141 includes a front frame connecting member 142 connected to the front frame side 11b of the support frame 11, a support member 143 on the lower side of the support frame 11 for supporting the front frame connecting member 142 so as to be movable forward and backward, a stand frame 144 for supporting the support member 143 on the floor, and a connecting frame 145 for connecting the stand frame 144 to the leg 108 of the sewing machine frame 1 f. The front frame connecting member 142 has a pair of upper and lower blocks 146 and 147 that fixedly hold the front frame side portion 11b, and the blocks 146 and 147 are detachably coupled by bolts 148.

The support member 143 has a rail 149 that is long in the front-rear direction inside the channel steel opened on the upper surface thereof, and a lower block 147 of the front frame coupling member 142 is coupled to a slider 150 supported on the rail 149 by a bolt 151. The gantry frame 144 has a pair of front and rear screw-type adjusting members 152 for adjusting the height of the support member 143 on the horizontal frame 144a at the upper end, and has the same height adjusting member 153 and damping pad 154 at the lower end. The connecting frame 145 is fixed at its rear end to the foot 108 of the sewing machine frame 1f, and at its front end detachably connected to the bed frame 144 via a connecting member 155. Therefore, according to the configuration of the lower front frame side support mechanism 141, the front frame side 11b of the support frame 11 can be supported without sagging forward by the support member 143 provided on the lower side of the front frame side 11b of the support frame 11, and the vertical vibration of the front frame side 11b can be suppressed by the connecting member 142, whereby a heavy object to be sewn such as jeans attached to the long sewing frame 8 can be embroidered with high accuracy.

[ example 7 ]

Example 7 shown in fig. 22 to 26 has a sewing frame substantially the same as that of example 1. The cylindrical sewing frame 8 includes a cylindrical inner frame 9 having a diameter slightly larger than and slightly smaller than that of the sewing frame 8, and the inner frame 9 is inserted into the inside of the sewing frame 8 to be configured double inside and outside. The sewing frame 8 has a front cylindrical element 8c whose front end is closed, a rear cylindrical element 8d whose front and rear ends are opened, a connecting element 8f for connecting the two elements, and a sewing window 8h for defining an embroidery range of the processing cloth W.

The sewing window 8h is formed to have the same length as the connecting element 8f and to open in a wide range except for the circumferential direction of the element 8 f. A stem 8b supported by the front frame side portion 11b of the support frame 11 is provided to protrude from the front end surface of the front cylindrical element 8c, and a coupling portion 8a coupled to the rotary drive mechanism 52a is provided at the rear end of the rear cylindrical element 8 d. Further, a bracket as a support portion 18 is attached to the front frame edge portion 11b of the support frame 11, and a bearing 20 that supports the stem 8b is provided on the bracket.

The inner frame 9 is configured such that a short pipe 9b is connected to the rear end of a long pipe 9a having substantially the same length as the sewing frame 8, and a narrow hole 9h through which a sewing needle (needle of an embroidery sewing machine) 5 of the embroidery machine 1 penetrates is formed in the circumferential wall of the long pipe 9a so as to extend in the front-rear direction at substantially the same length as the sewing window 8 h. On the other hand, an end plate 9c (see fig. 26) as a mounting portion is fixed to the rear end of the short tube 9b, and the rear end of the inner frame 9 is mounted to the vertical plate (mounting board) 13 of the rotation driving mechanism 52a of the left-right driving device 52 by a screw 28 inserted through a screw insertion hole 9d of the end plate 9 c. The vertical plate 13 is a fixed portion fixed to the support frame 11, and moves only in the front-rear direction integrally with the support frame 11 without rotating.

According to the sewing frame with the structure, the following effects can be obtained.

(1) Since the sewing frame 8 and the inner frame 9 are formed long in the front-rear direction together and the inner frame 9 is inserted into the inside of the sewing frame 8 with a slight gap, the tubular frame can be formed into a double-frame structure with a long front-rear direction and an inner-outer direction.

(2) In this double frame structure, the inner frame 9 covers the sewing window 8h of the sewing frame 8 from the inside, and supports the processing cloth W by the cylindrical surface extremely close to the cylindrical surface of the sewing frame 8.

(3) Therefore, the sewing window 8h can be widely opened in the longitudinal direction and the circumferential direction of the sewing frame 8 without lowering the holding force of the processed cloth W, and a sufficient embroidery range for large pattern processing of the long cylindrical processed cloth W such as jeans can be secured.

(4) In addition, since the inner frame 9 covers the entire area of the sewing window 8h from the inside, the troublesome work of attaching the interlining can be omitted, and the processing efficiency can be improved.

(5) Since the lining cloth is not required and a member for holding the lining cloth on the sewing frame 8 is not required, the whole of the tubular frame can be simply and inexpensively constituted by a small number of parts.

(6) Since both the front and rear ends of the sewing frame 8 are supported by the support frame 11 via the stem 8b and the engaging portion (coupling portion) 8a, the front drooping of the sewing frame 8 can be reliably prevented, and embroidery patterns can be processed with high precision over a wide range even in heavy long tubular sewn products such as jeans and golf bags.

The structure in which the front end of the sewing frame 8 is supported by the support frame 11 is not limited to the embodiment shown in fig. 25, and may be configured as shown in fig. 27. Here, the front end surface of the sewing frame 8 is open, the support piece 35 is provided to protrude from the front end surface of the inner frame 9, and the support frame 18 of the support frame 11 is provided with a receiving metal 36 for receiving the support piece 35. If necessary, a soft material may be attached between the front end portions of the inner frame 9 and the sewing frame 8.

[ example 8 ]

In example 8 shown in fig. 28 to 32, the following difference is that the cylindrical sewing frame 8 supports the processing cloth W along the cylindrical surface of the sewing frame 8 by the interlining cloth 160 covering the sewing window 8h, and the sewing frame 8 is provided with an interlining cloth pressing member 166 and a pressing member 176 thereof, as compared with example 1. Since the other structures are substantially the same as those of embodiment 1, the description of embodiment 1 will be applied.

The interlining fabric 160 is made of a relatively rigid material such as thick paper or nonwoven fabric that can maintain the shape of the processed fabric W.

A pair of left and right belt-shaped pieces 161 are fixed to the outer peripheral surface of the sewing frame 8 so as to extend along the longitudinal edge of the sewing window 8h, and a support member 162 is provided between the both belt-shaped pieces 161. The support member 162 is formed in an arch shape, and can support the lining cloth 160 in the same cylindrical surface as the sewing frame 8, and is attached to a screw hole 165 of the strip-shaped piece 161 by a screw 164 via an attachment portion 163 so that the position in the front-rear direction can be selected. Then, the interlining pressing member 166 is disposed under the left and right strip-shaped pieces 161, the interlining 160 is pressed against the sewing frame 8 by the interlining pressing member 166, and the interlining 160 is prevented from being loosened by the strip-shaped pieces 161 (see fig. 32 b).

As shown in fig. 30 and 31, the lining cloth pressing member 166 is formed of a steel strip plate, is longer than the sewing window 8h, and has a mounting piece 168 at the rear end and a hooking piece 171 at the front end. The attachment piece 168 is attached to a flange portion 170 of the sewing frame 8 by a screw 169, and the rear end of the lining cloth pressing member 166 is fixedly held by the sewing frame 8. The hook piece 171 is elastically hooked to the front end cutout 172 of the sewing frame 8, and openably holds the front end of the lining cloth pressing member 166 with respect to the sewing frame 8. At a plurality of positions in the longitudinal direction of the lining cloth pressing member 166, claws 174 are formed by notches 173, and in a state where the front end of the lining cloth pressing member 166 is closed by the hooking piece 171, the claws 174 bite into the lining cloth 160 to firmly hold the lining cloth 160 to the sewing frame 8.

A pressing member 176 is provided below the left and right cloth presser members 166 at a longitudinally intermediate position of the sewing window 8 h. The pressing member 176 is formed in a short booklet shape by a plate spring, has a base end pivotally attached to the sewing frame 8 by a screw 177 and a nut 178, and has a pressing portion 179 formed at a leading end thereof so as to bend and press an intermediate portion of the lining cloth pressing member 166 toward the sewing frame 8. Then, by the operation of the operator, the pressing member 176 is rotated in the front-rear direction to an operating position (solid line position shown in fig. 30) where the pressing portion 179 overlaps the outer surface of the patch pressing member 166, and to an inactive position (broken line position shown in fig. 30) where the pressing portion 179 is spaced downward from the patch pressing member 166.

In the sewing frame 8 configured as described above, when an embroidery pattern is to be processed on a long tubular processing cloth W such as jeans, first, as shown in fig. 32(a), the pressing member 176 is turned to the inactive position, the interlining pressing member 166 is opened, and the interlining cloth 160 is covered on the sewing window 8 h. Next, as shown in fig. 32(b), the lining cloth pressing member 166 is closed, and the lining cloth 160 is sandwiched between the lining cloth pressing member 166 and the sewing frame 8. Then, the pressing member 176 is rotated to the operating position, and the pressing portion 179 presses the intermediate portion of the lining cloth pressing member 166 against the sewing frame 8, thereby elastically deforming the lining cloth pressing member 166 and causing the claws 174 to bite into the lining cloth 160. Thus, the lining cloth 160 can be firmly held by the sewing frame 8 by the elastic force of the pressing member 176 at the intermediate position in the longitudinal direction of the sewing window 8 h.

Next, the processing cloth W is covered on the interlining cloth 160, the processing cloth W and the interlining cloth 160 are fastened to the sewing frame 8 together with the interlining cloth pressing member 166 by a binding band 180 (see fig. 30), and the remaining portion of the processing cloth W is held by a clip (not shown) by a protruding strip 181 (see fig. 31) provided so as to protrude from the lower surface of the sewing frame 8. Then, the sewing frame 8 is attached to the support frame 11, and the embroidery sewing machine 1 is started to process the embroidery pattern long in the longitudinal direction on the processing cloth W. At this time, since the lining cloth 160 is firmly held by the pressing member 176 on the sewing frame 8, there is no possibility that the lining cloth 160 is deformed by an impact at the time of needle drop. Therefore, the embroidery pattern can be accurately processed by holding the processing cloth W in a regular cylindrical shape by the interlining cloth 160.

Further, for example, the present invention may be modified and embodied as appropriate as described below.

(a) The lining cloth pressing member 166 shown in fig. 29 is formed long in the front-rear direction by the rod member.

(b) The lining cloth pressing member 166 is held on the sewing frame 8 by a rear end shaft so as to be rotatable in the left-right direction or in the up-down direction.

(c) The front end of the lining cloth pressing member 166 is fixedly held by the sewing frame 8, and the rear end of the lining cloth pressing member 166 is held so as to be openable with respect to the sewing frame 8.

(d) Within the range of the length of the sewing window 8h, two or three pressing members 176 shown in fig. 29 are provided.

[ example 9 ]

Embodiment 9 shown in fig. 33 and 34 is different from embodiment 8 in the constitution of the sewing frame 8. The sewing frame 8 has three sewing windows 8h1, 8h2, 8h3 and three reinforcing walls 8w1, 8w2, 8w3 in the cylindrical peripheral wall so as to extend long in the front-rear direction. The first sewing window 8h1 is formed to have substantially the same size as the sewing window 8h of example 8, and the second and third sewing windows 8h2, 8h3 are formed to be bilaterally symmetrical with respect to each other with a smaller area than the first sewing window 8h 1. The same lining cloth pressing member 166 as in example 8 is added to the first reinforcing wall 8w1 and the second reinforcing wall 8w2, and the pressing member 176 pressing the intermediate portion of the lining cloth pressing member 166 is rotatably supported by the support piece 8p of the third reinforcing wall 8w 3.

According to the configuration of embodiment 9, since the three sewing windows 8h1, 8h2, 8h3 and the same number of reinforcing walls 8w1, 8w2, 8w3 are formed in the sewing frame 8, the sewing frame 8 can be made lightweight without reducing the strength in the long sewing frame 41. Further, since the three sewing windows 8h1, 8h2, and 8h3 are formed as a large opening portion in the circumferential direction of the sewing frame 8 as a whole, the embroidery range of the sewing frame 8 can be greatly expanded by selectively estimating the sewing windows 8h1, 8h2, and 8h3 at the sewing position of the embroidery sewing machine 1 by the rotary drive mechanism 52 a. Therefore, there is an advantage that it is possible to easily form an embroidery pattern long in the longitudinal direction at each position in the circumferential direction of jeans and the like without newly hanging the processed cloth W.

[ example 10 ]

In example 10 shown in fig. 35 to 40, a tubular sewing frame 8 has a base frame 8m and a cloth stretching frame 182, and a plurality of cloth stretching frames 182 having different sewing window shapes are replaceably attached to the base frame 8m, which is different from example 1. Since the other structures are substantially the same as those of embodiment 1, the description of embodiment 1 will be applied.

As shown in fig. 36, 37, and 38, the sewing frame 8 has a base frame 8m attached to the sewing frame driving device 10, and a cloth stretching frame 182 that sticks a long cylindrical processed cloth W and is long in the front-rear direction, and is formed in a cylindrical shape as a whole. The base frame 8m is formed in a cylindrical shape slightly longer than the cloth stretching frame 182 by a sheet metal, and has a front element 8c whose front end is closed, a rear element 8d whose front and rear ends are opened, a connecting element 8f connecting the front element 8c and the rear element 8d, and an opening 8i having a length equal to that of the connecting element 8 f.

A shaft 8b is provided to protrude from the front end surface of the front element 8c, and a front support portion 8j that supports the front end portion 182a of the cloth stretching frame 182 is provided to the peripheral wall of the front element 8 c. The flange 170 is fixed to the rear element 8d, an engagement portion (attachment portion) 8a attached to the rotation drive mechanism 52a is provided on the rear surface of the flange 170, and a rear support portion 8k that supports the rear end portion 182b of the cloth stretching frame 182 is provided on the front surface of the flange 170.

The cloth stretching frame 182 is formed in a semi-cylindrical shape by a sheet metal, and has a sewing window 182h for specifying an embroidery range of the processing cloth W, joining portions 182c on both left and right sides of the sewing window 182h to be joined to the coupling elements 8f of the base frame 8m, and an opening portion 182d on a lower side of the sewing window 182h for opening the joining portions 182c left and right in a cylindrical surface having a diameter substantially equal to that of the base frame 8 m. Then, the cloth stretching frame 182 is detachably attached to the base frame 8m by a plurality of screws 183 (see fig. 38) while covering the base frame 8m through the opening part 182 d.

A plurality of cloth stretching frames 182 having different shapes of sewing windows 182h are prepared on the sewing frame 8. The cloth stretching frame 182A shown in fig. 38 has a rectangular sewing window 182Ah which is wide in the width direction and straight in the length direction of a long cylindrical processed cloth W such as pants (jeans are shown by way of example). The cloth stretching frames 182B and 182C shown in fig. 39(a) and (B) have arcuate sewing windows 182Bh and 182Ch that are narrow in the width direction and curved in the length direction. The cloth stretching frame 182D shown in fig. 40(a) and (b) has a wave-shaped sewing window 182Dh narrow in the width direction and meandering in the body length direction.

The sewing windows 182Ah to 182Dh each extend long between the front end 182A and the rear end 182b of the cloth stretching frames 182A to 182D so as to be able to process embroidery patterns that are continuous in the longitudinal direction of the processed cloth W. Then, the cloth stretching frames 182A to 182D are replaceably attached to the base frame 8m in a state where the front and rear end portions 182A and 182b are hung on the front and rear supporting portions 8j and 8k of the base frame 8 m. The processing cloth W is held by the belt 184 (see fig. 38) on the sewing frame 8, and the remaining portion of the processing cloth W is held and fixed by a cloth holder 185 (see fig. 37) provided to protrude from the lower surface of the base frame 8 m.

Therefore, according to the sewing frame 8 for embroidery in example 10, the following operational effects can be obtained.

(1) Since the front element 8c and the rear element 8d of the base frame 8m support the cloth stretching frame 182 via the front and rear end portions 182a, 182b, the sewing window 182h can be formed long over substantially the entire length of the cloth stretching frame 182. Therefore, the embroidery pattern continuous in the longitudinal direction can be efficiently processed in one step without newly sticking the processing cloth W.

(2) Since the cloth stretching frame 182 is replaceably attached to the base frame 8m, the shape of the sewing window 182h can be selected in accordance with the embroidery pattern. Therefore, for example, a large embroidery pattern having the largest length and width can be processed using the cloth stretching frame 182A shown in fig. 38, a narrow arcuate embroidery pattern can be processed using the cloth stretching frames 182B and 182C shown in fig. 39(a) and (B), a wavy embroidery pattern can be processed using the cloth stretching frame 182D shown in fig. 40(a) (a small embroidery pattern is embedded, and a large embroidery pattern can be seen as a whole), or a wavy embroidery pattern having opposite sides can be processed by reversing the same cloth stretching frame 182D back and forth as shown in fig. 40B.

(3) Since the size of the sewing window 182h can be selected according to the embroidery pattern, the processing cloth W can be covered on the sewing window 182h with a suitable opening area, thereby preventing the processing cloth W from deforming and loosening during sewing and improving the processing precision of the embroidery pattern.

(4) The change of the embroidery pattern can be coped with by replacing the single cloth stretching frame 182, and it is not necessary to prepare several kinds of sewing frames, and the management of accessories of the embroidery sewing machine 1 becomes easy.

(5) Since the open portion 182d is provided in the cloth stretching frame 182, it is possible to easily attach the cloth stretching frame 182 to the base frame 8m by replacing only the cloth stretching frame 182 in a state where the base frame 8m is attached to the sewing frame driving device 10.

(6) In the case of a cloth to be processed which is easy to slip, the material of the cloth stretching frame 182 may be selected according to the material and kind of the cloth to be processed W, for example, by using the cloth stretching frame 182 having the anti-slip surface, or by using the thick cloth stretching frame 182 in the case of a heavy cloth to be processed.

(7) The base frame 8m is made of a thick steel plate (see fig. 37), or the cloth stretching frame 182 is made of a thin steel plate, a resin plate, or the like, and a material corresponding to the load can be selected, thereby securing the rigidity of the entire sewing frame 8 and achieving weight reduction.

[ example 11 ]

In example 11 shown in fig. 41 and 42, the structure of the base frame 8m of the sewing frame 8 and the shape of the cloth stretching frame 182 are different from those of example 10. As shown in fig. 41, the base frame 8m has a front element 8c attached to a front portion (a bracket as the support portion 17) of the sewing frame driving device 10 and a rear element 8d attached to a rear portion (a rotation driving mechanism 52a) of the sewing frame driving device 10 in a separated state. A front side supporting portion 8j that supports the front end portion 182a of the cloth stretching frame 182 is provided on the front side element 8c, and a rear side supporting portion 8k that supports the rear end portion 182b of the cloth stretching frame 182 is provided on the rear side element 8 d.

The cloth stretching frame 182 is formed in a cylindrical shape closed over the entire circumference, and has a sewing window 182h for defining an embroidery range of the processing cloth W in a cylindrical surface having substantially the same diameter as the base frame 8 m. The front end 182a of the cloth stretching frame 182 is inserted into the front-side supporting portion 8j of the base frame 8m, and the rear end 182b is inserted into the rear-side supporting portion 8 k. As illustrated in fig. 42(a) and (B), sewing windows 182Ah and 182Bh having different shapes are formed in the cloth stretching frames 182A and 182B, and the cloth stretching frames 182A and 182B are attached to the front and rear support portions 8j and 8k of the base frame 8m in a replaceable manner while both front and rear end portions 182A and 182B are hooked on the front and rear support portions 8j and 8 k.

Therefore, according to the sewing frame 8 for embroidery in example 11, the following operational effects can be obtained.

(8) Since the cloth stretching frame 182 is formed in a cylindrical shape closed over the entire circumference, the rigidity can be improved, and the entire length of the heavy long cylindrical processed cloth can be accurately supported in the horizontal plane.

(9) The sewing window 182h can be largely changed in the circumferential direction of the cloth stretching frame 182, and for example, an embroidery pattern of a spiral pattern can be processed.

[ example 12 ]

In example 12 shown in fig. 43, the sewing frame 68 has a flat base frame 68m attached to the sewing frame driving device and a flat cloth stretching frame 183 to which a long cylindrical processed cloth is attached, and the whole is formed into a flat frame shape. The base frame 68m has a front end 68b attached to a front portion of the frame driving device and a rear end 68a attached to a rear portion of the frame driving device. In the case of the sewing frame 68 having a flat frame shape, the frame driving device is provided with a mechanism for linearly driving the base frame 68m in the left-right direction, instead of the rotation driving mechanism 52a shown in fig. 35. In this embodiment, the base frame 68m is formed to have a shape conforming to the leg shape of jeans and to be tapered with a plate.

The front end portion 68b is provided with a front support portion 68j that supports the front end portion 183a of the cloth stretching frame 183, and the rear end portion 68a is provided with a rear support portion 68k that supports the rear end portion 183 b. A sewing window 183h for defining an embroidery range of the processed cloth is formed in the cloth stretching frame 183 so as to extend between the front end 183a and the rear end 183 b. Then, the plurality of cloth stretching frames 183(183A, 183B) having the sewing windows 183h (183Ah, 183Bh) of different shapes are attached to the base frame 68m in a replaceable manner in a state where the front and rear end portions 183A, 183B are hung on the front and rear supporting portions 68j, 68k of the base frame 68 m. Therefore, according to the sewing frame 68 having a flat frame shape, it is possible to process an embroidery pattern with high accuracy even in a long direction and a width direction of a long cylindrical processing cloth having a plurality of patterns.

[ example 13 ]

Example 13 shown in fig. 44 to 49 is different from example 2 in the structure of the sewing frame 68 made of a flat steel plate. Since the other structures are substantially the same as those of embodiment 2, the description of embodiment 2 will be applied.

The sewing frame 68 is formed with a narrow front portion 68e, a wide rear portion 68f, and a tapered intermediate portion 68 g. A coupling portion 68b for coupling the slide plate 79 is provided at the front end of the front portion 68e, and a coupling portion 68a coupled to the rear end support member 73 is provided at the rear end of the rear portion 68 f. In the region other than the coupling portion 68b and the coupling portion 68a, a sewing window 69 is formed long in the front-rear direction in the sewing frame 68. The sewing window 69 has a narrow width portion 69a included in the front portion 68e of the sewing frame 68, a wide width portion 69b included in the rear portion 68f, and a tapered portion 69c included in the middle portion 68g, and the embroidery range of the long tubular workpiece cloth W (see fig. 49) is defined by the respective portions 69a, 69b, and 69 c.

As shown in fig. 48, reinforcing ribs 187 are provided on both left and right side edges of the sewing frame 68 so as to extend along the longitudinal edges of the sewing window 69. The reinforcing rib 187 is formed by a pair of an outer rib 188 bent downward at both left and right side edges of the sewing frame 68 and an inner rib 189 welded to an inner surface of the outer rib 188. At the lower edge of the outer rib 188, a plurality of upper cloth retainers 190 are bent outward, and at the upper end of the inner rib 189, an inclined portion 191 is provided which comes into contact with the lower surface of the sewing frame 68. A plurality of lower cloth holders 192 (193 in fig. 45 indicates a welded portion) facing the upper cloth holder 190 are welded to the lower outer surface of the inner rib 189, and the work cloth W is fixed to the upper and lower cloth holders 190, 192 by clips 194. Further, a pair of left and right vertical ribs 195 are welded to the upper surface of the front end connecting portion 68b of the sewing frame 68. Further, a soft material 186 for preventing metal contact with the cylindrical housing 7 may be attached to the lower surface of the sewing frame 68.

As shown in fig. 46 to 48, the sewing frame 68 is detachably covered with an aligning jig 201 for aligning the processing cloth W with a needle drop hole P (sewing position) at the front end of the cylindrical bed 7. The positioning jig 201 is formed of a flat steel plate or a plastic plate into a substantially rectangular shape, and includes a pair of left and right lateral determining portions 202 and 203 for positioning the positioning jig 201 in the width direction of the sewing frame 68, and a pair of front and rear longitudinal determining portions 204 and 205 for positioning the positioning jig 201 in the longitudinal direction of the sewing frame 68. The lateral determining portions 202 and 203 are bent relatively downward from the outside at the outer side rib 188 of the sewing frame 68, the longitudinal determining portion 204 at the front end is bent relatively upward from the rear side at the longitudinal rib 195 of the sewing frame 68, and the longitudinal determining portion 205 at the rear end is bent relatively upward from the front side at the reinforcement fitting 206 on the rear end support member 73. Further, the positioning jig 201 is formed with an opening 207 that indicates the position of the sewing window 69 to the operator from above the processing cloth W, and is elongated in the front-rear direction in a shape similar to the sewing window 69 and that reduces the size of the sewing window 69. Further, the lateral determining portions 202 and 203 are provided with a scale 209 for positioning around the opening 207 by bending the handle 208 outward.

In the sewing frame 68 configured as described above, when an embroidery pattern is to be processed on a long tubular processing cloth W such as jeans, first, as shown in fig. 49(a), the positioning jig 201 is detached from the sewing frame 68, a thick interlining cloth (not shown) is covered on the sewing window 69, the processing cloth W is inserted into the sewing frame 68 from the tip end side, and the sewing window 69 is covered in a state of being overlapped with the interlining cloth. Next, the positioning jig 201 covers the sewing frame 68 (see fig. 47) from the upper surface of the processing cloth W, and positions the processing cloth W in the front, rear, left, and right directions by the horizontal determining portions 202 and 203 and the vertical determining portions 204 and 205, so that the sewing start position of the processing cloth W is aligned with the needle drop hole P. At this time, although the needle drop hole P is hidden by the processing cloth W and cannot be seen, the operator can easily align the sewing start position with the needle drop hole P based on the contour of the opening 207 of the jig 201 and the scale 209. Fig. 49(a) shows a state in which the narrow portion Wa of the processing cloth W (the hem of the pants) is aligned with the narrow portion 69a of the sewing window 69.

Next, as shown in fig. 48, the processing cloth W is stretched over the sewing window 69, and both right and left side portions of the processing cloth W are fixed to the upper and lower cloth fixing members 190, 192 of the reinforcing rib 187 by the clips 194. Then, the positioning jig 201 is detached from the sewing frame 68, the rear end coupling portion 68a of the sewing frame 68 is coupled to the rear end support member 73 of the sewing frame drive mechanism by a screw (not shown) or the like, and the front end coupling portion 68b of the sewing frame 68 is supported by the front end support portion 78 of the support frame 11 by the front end support member (slide plate) 79 (see fig. 44). Then, the embroidery sewing machine 1 is started to drive the sewing frame 68 in the front-rear-left-right direction, and an embroidery pattern of a relatively small pattern is processed on the narrow width portion Wa of the processing cloth W. At this time, since the sewing frame 68 is reinforced by the reinforcing ribs 187 of the inner and outer pairs, there is no possibility that the sewing frame 68 is deformed by its own weight or an impact at the time of needle drop. Therefore, the long tubular workpiece cloth W can be held accurately in the horizontal plane by the sewing frame 68, and the embroidery pattern can be processed with high accuracy.

On the other hand, as shown in fig. 49 b, when an embroidery pattern is to be formed on the wide width portion Wb (the waist portion of jeans) of the long tubular workpiece cloth W, the wide width portion Wb is covered on the wide width portion 69b of the sewing frame 69, the sewing start position of the workpiece cloth W is aligned with the needle drop hole P, the left and right side portions of the workpiece cloth W are fixed to the cloth holders 190, 192 by the clips 194, and then the embroidery sewing machine 1 is started to form an embroidery pattern of a relatively large pattern on the wide width portion Wb. In this way, when processing a special-shaped sewn product such as booties, it is possible to efficiently process embroidery patterns having different sizes in the narrow width portion Wa and the wide width portion Wb of the processed cloth W using one type of sewing frame 68 without replacing the frame. Further, the entire length of the sewing window 69 can be effectively used, and the embroidery pattern long in the longitudinal direction can be easily processed without having to hang the processing cloth W on the sewing frame 68 again.

Example 13 can also be modified and embodied as appropriate, for example, as described below.

(1) The sewing frame 68 is used for embroidering relatively short tubular processing cloth such as T-shirts and pillow cases.

(2) The sewing frame 68 is used for embroidering a flat article such as a bath towel or a mask.

(3) In the case where there is no narrow width processed cloth that can be fixed by the clip 194, the cloth is attached to the sewing frame 68 at a plurality of positions around the sewing window 69 by the double-faced adhesive.

(4) The sewing frame 68 is formed in a rectangular shape that is long in the front-rear direction so that the respective portions in the front-rear direction have the same width.

(5) The narrow width portion 69a of the sewing window 69 is formed at the rear side portion of the sewing frame 68, and the wide width portion 69b of the sewing window 69 is formed at the front side portion of the sewing frame 68.

[ example 14 ]

In example 14 shown in fig. 50 to 54, the periphery of the embroidery range of the tubular processed cloth is fixed to the upper surface of the flat sewing frame.

The sewing frame 68 made of flat steel plate has a length in the longitudinal direction of, for example, 60 to 100cm, and a length in the short direction of, for example, 12 to 25 cm. A coupling portion 68b for coupling the front end support member (sliding plate) 79 is provided at the front end of the sewing frame 68, and a coupling portion 68a for coupling the rear end support member 73 is provided at the rear end. In the sewing frame 68, a sewing window 69 is formed in a longitudinal direction in a slender shape in a region other than the coupling portion 68b and the coupling portion 68a, and the embroidery range of the long cylindrical processed cloth W (see fig. 54) is defined by the sewing window 69.

As shown in fig. 54, reinforcing ribs 187 are provided on both left and right side edges of the sewing frame 68 so as to extend along the longitudinal edges of the sewing window 69. The reinforcing rib 187 is formed by a pair of an outer rib 188 bent downward at both left and right side edges of the sewing frame 68 and an inner rib 189 welded to an inner surface of the outer rib 188. A plurality of cloth retainers 190 are formed at the lower edge of the outer rib 188 so as to be bent outward, and an inclined portion 191 that comes into contact with the lower surface of the sewing frame 68 is provided at the upper end of the inner rib 189. The processing cloth W is fixed to the cloth holder 190 by a spring openable and closable clamp 194. A pair of left and right vertical ribs 195 are welded to the upper surface of the distal end connecting portion 68b of the sewing frame 68. Further, a soft material 186 for preventing metal contact with the cylindrical housing 7 may be attached to the lower surface of the sewing frame 68.

As shown in fig. 52 to 54, the sewing frame 68 is detachably covered with an aligning jig 201 for aligning the cloth W to be processed with a needle drop hole P (sewing position) at the front end of the cylindrical bed 7. The jig 201 is formed of a flat steel plate or a plastic plate into a substantially rectangular shape, and has a pair of left and right lateral determining portions 202 and 203 for positioning the jig 201 in the width direction of the sewing frame 68. The lateral determining portions 202 and 203 are bent downward from the outside relatively at the reinforcing rib 187 of the sewing frame 68, and an opening 207 for indicating the position of the sewing window 69 from the upper side of the processed cloth W to the operator is formed in the jig 201 to be elongated in the front-rear direction in a shape similar to the sewing window 69 and narrowing the sewing window 69. Further, around the opening 207, a scale 209 for alignment is provided.

In the sewing frame 68 configured as described above, when an embroidery pattern is to be processed on a long tubular work cloth W such as pants (for example, jeans), first, the positioning jig 201 is detached from the sewing frame 68 (a thick lining cloth (not shown) is covered on the sewing window 69 as necessary), and the tubular work cloth W is inserted into the sewing frame 68 from the distal end side to cover the sewing window 69. Next, the positioning jig 201 is positioned to the reinforcing rib 187 by the horizontal determining portions 202 and 203 while covering the sewing frame 68 (see fig. 53) from the upper surface of the processing cloth W, and the sewing start position of the processing cloth W is aligned with the needle drop hole P. At this time, although the needle drop hole P is hidden until the cylindrical processed cloth W is not seen, the operator can easily align the sewing start position with the needle drop hole P according to the contour of the opening 207 of the jig 201 and the scale 209.

Next, as shown in fig. 54, the embroidery area of the tubular processed cloth W is extended flat on the sewing window 69, and the peripheral portions (left and right side portions in this example) of the embroidery area of the tubular processed cloth W are fixed to the cloth holder 190 of the reinforcing rib 187 by the clip 194. Then, the positioning jig 201 is detached from the sewing frame 68, the rear end coupling portion 68a of the sewing frame 68 is coupled to the rear end support member 73 of the X drive frame 10 by a screw (not shown) or the like, and the front end coupling portion 68b of the sewing frame 68 is supported by the front end support portion 78 of the support frame 11 by the front end support member (slide plate) 79 (see fig. 50). Then, the embroidery sewing machine 1 is started to drive the sewing frame 68 in the front-rear-left-right direction, and the embroidery pattern is processed in the embroidery range of the tubular processed cloth W. At this time, since the sewing frame 68 is reinforced by the reinforcing ribs 187 of the inner and outer pairs, there is no possibility that the sewing frame 68 is deformed by its own weight or an impact at the time of needle drop. Therefore, the long tubular workpiece cloth W can be held accurately in the horizontal plane by the sewing frame 68, and the embroidery pattern can be processed with high accuracy.

[ modification 1 ]

In modification 1 of example 14 shown in fig. 55, the sewing frame 68 is divided into a pair of end portions 68p, 68q and a connecting portion 68r between the end portions 68p, 68q in the width direction, and the pair of end portions 68p, 68q and the connecting portion 68r are connected to each other with the position thereof adjustable by the screw 204, so that the sewing window 69 can be extended and contracted in the width direction in a rectangular state as in (a) or the sewing window 69 can be extended and contracted with a change in shape between a rectangle and a trapezoid as in (b). In this example, the sewing frame 68 is further divided into a pair of end portions 68u and 68v in the longitudinal direction and a connecting portion 68w having an L-shaped cross section, for example, between the end portions, and the pair of end portions 68u and 68v and the connecting portion 68w are connected to each other with the position thereof adjustable by the screw 204, whereby the sewing window 69 can be extended and contracted in the longitudinal direction.

According to this example, it is possible to apply the present invention to a cylindrical processed cloth having a wide embroidery range and a different embroidery range by using one sewing frame 68, and to secure the maximum embroidery range. Further, since the sewing window can be made to expand and contract with the change in shape between the rectangular shape and the trapezoidal shape, when a special-shaped sewn product such as boots is processed by one sewing frame 68, it is possible to cope with this without replacing the frame.

[ modification 2 ]

A modification 2 of example 14 shown in fig. 56 differs from the example in that the sewing frame 68 has a narrow front portion 68e, a wide rear portion 68f, and a tapered intermediate portion 68g, the narrow portion 69a of the sewing window 69 is formed at the front portion 68e, the wide portion 69b is formed at the rear portion 68f, and the tapered intermediate portion 69c is formed at the intermediate portion 68 g. The sewing frame 68 is divided into two in the width direction to form a pair of end portions 68p and 68q and a coupling portion 68r between the end portions 68p and 68q, and the pair of end portions 68p and 68q and the coupling portion 68r are connected to each other with the position thereof adjustable by a screw 204, whereby the sewing window 69 can be extended and contracted in the width direction.

According to this example, when an embroidery pattern is processed on a narrow width portion (for example, a hem of booties) of the tubular processed cloth W, the narrow width portion 69a can be hooked with the embroidery pattern, and when an embroidery pattern is processed on a wide width portion (for example, a waist portion of pants) of the tubular processed cloth W, the wide width portion 69b can be hooked with the embroidery pattern. Accordingly, when a special-shaped sewn product such as booties is to be processed, embroidery patterns of different sizes can be efficiently processed on the narrow width portion and the wide width portion of the processed cloth using one sewing frame 68 without replacing the frame. Further, as in modification 1, the effect of expansion and contraction of the sewing window 69 can be obtained.

[ modification 3 ]

The sewing frame 68 of the modification 3 of the embodiment 14 shown in fig. 57 has a long and thin flat-plate-shaped pressing frame 211 for pressing not only the sewing frame 68 but also the surrounding portion of the embroidery range of the tubular processed cloth against the sewing frame 68, and the pressing frame 211 is provided with a transmission window 212 substantially similar to the sewing window 69 of the sewing frame 68. In this example, the sewing frame 68 has a simple structure having a single-weight (corresponding to 188) reinforcing rib 187 and an outward cloth holder 190, and the pressing frame 211 also has a simple structure having an upward reinforcing rib 213 and an outward cloth holder 214. The tubular processing cloth covers the sewing frame 68, the periphery of the embroidery range of the tubular processing cloth is pressed against the sewing frame 68 by the pressing frame 211, and the two cloth holders 190, 214 are caught and fixed by the clip 194.

According to this embodiment, since either one of the sewing frame 68 and the pressing frame 211 can be made to have strength, the structure on the side that affects the embroidery area can be made extremely simple. Therefore, the cloth can be more easily used for long cylindrical processed cloths such as pants and arms.

Example 14 can be appropriately modified and embodied as described below, for example.

(1) The sewing frame 68 is used for embroidering relatively short tubular processing cloth such as T-shirts and pillow cases.

(2) The sewing frame 68 is used for embroidering a flat article such as a bath towel or a mask.

(3) In the case where there is no narrow width processed cloth that can be fixed by the clips 194, the cloth is attached to the sewing frame 68 at a plurality of positions around the sewing window 69 by the double-faced adhesive.

Claims (19)

1. A sewing frame driving mechanism of a sewing machine is characterized in that a front frame side part and a rear frame side part of a rectangular frame-shaped supporting frame which moves forwards and backwards but does not move leftwards and rightwards are provided with a supporting mechanism which is used for supporting the front end and the rear end of the sewing frame which stretches and holds a sewed object and can move leftwards and rightwards relative to the front frame side part along with the driving of the sewing frame,

a front droop prevention mechanism for preventing the front frame edge part of the supporting frame from drooping downwards relative to the back frame edge part,

the front droop prevention mechanism comprises a left and right protruding parts of the workbench protruding forwards relatively by a concave part recessed backwards from the front side of the workbench, and left and right frame side parts of the support frame which can be placed on the left and right protruding parts in a front-back displacement manner.

2. The sewing frame driving mechanism of a sewing machine according to claim 1, further comprising a guide mechanism for guiding the forward and backward displacement of the support frame without lateral displacement and preventing lateral rocking.

3. The sewing frame driving mechanism of claim 2, wherein the guide mechanism has left and right inner end surfaces of a recess recessed rearward from a front edge of the table, and guide rollers attached to left and right frame side portions of the support frame and rotatably contacting the inner end surfaces.

4. The sewing frame driving mechanism of a sewing machine according to claim 3, wherein the guide mechanism has a position adjusting mechanism for adjusting the position of the guide roller to the left and right.

5. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame is cylindrical, the sewing frame comprises a cylindrical inner frame inserted into the inner side of the sewing frame and supported on the side part of the rear frame of the supporting frame in a non-rotatable manner, a supported part supported on the side part of the front frame of the supporting frame is arranged at the front end of the inner frame, and an opening part with the size that the hand of an operator enters the inner frame is arranged at the front end of the inner frame.

6. The sewing frame driving mechanism of claim 1, wherein the front and rear ends of the plurality of sewing frames are supported by the front and rear frame side portions of the support frame by the support mechanism, and a left and right intermediate portion of the front frame side portion of the support frame is supported by the front frame side portion support mechanism so as to be displaceable in the front-rear direction and not to sag forward.

7. The sewing frame driving mechanism of claim 6, wherein the front frame side supporting mechanism includes a supporting shaft which is provided to be movable forward and backward together with the supporting frame, supports a left and right intermediate portion of the front frame side at a front end thereof, and extends forward and backward.

8. The sewing frame driving mechanism of claim 6, wherein the front frame side supporting mechanism comprises a supporting frame fixed to the sewing machine frame, and a supporting shaft provided to the supporting frame so as to be movable forward and backward, wherein a supporting portion for supporting a left and right intermediate portion of the front frame side is provided at a front end of the supporting shaft, and a vibration preventing member for restricting vibration of the supporting shaft by contacting at least an upper surface of the supporting shaft is provided at the front end of the supporting frame.

9. The sewing frame driving mechanism of claim 6, wherein the support mechanism comprises a connecting member connected to a left and right middle portion of the support frame, and a support member for supporting the connecting member on a lower side of the support frame so as to be movable in the front-rear direction.

10. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame is a cylinder shape long in the front-back direction, and comprises a cylinder inner frame inserted into the inner side of the sewing frame, a sewing window for determining the embroidery range of the processing cloth is formed on the sewing frame in the front-back direction, a connecting part connected with a rotary driving mechanism on the supporting frame is arranged at the rear end of the sewing frame, a needle hole penetrated by a sewing needle of the embroidery machine is formed on the inner frame in the front-back direction, an installation part of a fixed part installed on the supporting frame is arranged at the rear end of the inner frame, and a supporting part of the front frame supported on the supporting frame is arranged at the front end of any one of the sewing frame or the inner frame.

11. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame is cylindrical, a sewing window for determining the embroidery range of the processing cloth is formed on the sewing frame, the lining cloth pressing component is used for supporting the processing cloth along the outer surface of the sewing frame through the lining cloth covered on the sewing window and pressing the lining cloth to the sewing frame, and the lining cloth pressing component is provided with a pressing component which is used for keeping the front end and the rear end of the lining cloth pressing component on the sewing frame in the front and the rear of the sewing window and pressing the middle part of the lining cloth pressing component to the sewing frame at the middle position of the sewing window in the length direction.

12. The sewing frame driving mechanism of a sewing machine according to claim 11,

the lining cloth pressing member is fixed to the sewing frame at one end and is held at the other end so as to be openable with respect to the sewing frame, and the pressing member is attached to the sewing frame and is movable between a position overlapping the lining cloth pressing member and a position spaced apart from the lining cloth pressing member.

13. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame comprises a base frame mounted on a frame driving device of a sewing machine, and a cloth hanging frame long in the front-back direction for pasting the processed cloth, wherein a front side supporting part for supporting the front end part of the cloth hanging frame and a rear side supporting part for supporting the rear end part of the cloth hanging frame are arranged on the base frame, a sewing window for determining the embroidery range of the processed cloth is formed between the front end part and the rear end part of the cloth hanging frame, and a plurality of cloth hanging frames with different sewing window shapes are replaceably mounted on the base frame.

14. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame is a flat plate shape with a long front-back direction, a sewing window with a long front-back direction for dividing the embroidery range of the processing cloth and a reinforcing rib extending along the long edge of the sewing window are arranged on the sewing frame, a narrow width part is formed on one side of the front side and the back side of the sewing window, and a wide width part is formed on the opposite side.

15. The sewing frame driving mechanism of a sewing machine according to claim 1,

the sewing frame has a front and a rear ends, and a support part supported by the front and rear frame side parts of the rectangular frame-shaped support frame in a manner of being capable of being displaced in the left and right directions relative to the front and rear frame side parts in accordance with the driving of the sewing frame,

the sewing frame is a long and thin flat plate entering the cylindrical processing cloth, a long and thin sewing window for dividing the embroidery range of the cylindrical processing cloth is arranged on the sewing frame, and the periphery of the embroidery range of the cylindrical processing cloth is fixed on the upper surface of the sewing frame.

16. The sewing frame driving mechanism of a sewing machine according to claim 15, wherein the sewing frame is detachably provided with a positioning jig, and the positioning jig is provided with a positioning portion for the sewing frame and an opening portion for indicating a position of the sewing window from an upper side of the processing cloth.

17. The sewing frame driving mechanism of a sewing machine according to claim 15, wherein the sewing frame is divided into a plurality of parts in the width direction or the longitudinal direction, and the parts are connected to each other with a position adjustable, so that the sewing window can be extended and contracted in the width direction or the longitudinal direction.

18. The sewing frame driving mechanism of a sewing machine according to claim 17, wherein the sewing window is capable of extending and contracting in accordance with a change in shape between a rectangular shape and a trapezoidal shape.

19. The sewing frame driving mechanism of a sewing machine according to claim 15, comprising an elongated flat plate-like pressing frame for pressing a peripheral portion of an embroidery range of the tubular workpiece cloth against the sewing frame, wherein the pressing frame is provided with a through window having substantially the same shape as a sewing window of the sewing frame.