JP2004049548A - Sewing machine upholstery - Google Patents

Abstract

In a device for attaching a cylindrical work cloth using a cylindrical frame, a sewing range in a circumferential direction of the cylindrical frame is extended.
A cylindrical frame is divided into a pair of front and rear cylindrical elements, and a rear cylindrical element is connected to a frame driving mechanism of an embroidery sewing machine. And drive in the circumferential direction. The cylindrical elements 25 and 26 are connected to each other by a rigid member 27 at an interval in the front and rear, and an opening 28 is formed in an intermediate portion of the cylindrical frame 19 so as to open circumferentially at an angle excluding the rigid member 27. The front-side cylindrical element 25 is attached to the rigid member 27 so as to be position-adjustable in the front-rear direction. The distance between the cylindrical elements 25 and 26 is changed to change the length of the opening 28 in the front-rear direction. The cylindrical work cloth W is put on the opening 28 and held on the cylindrical elements 25 and 26 by two front and rear surface fastener belts 33.
[Selection diagram] Fig. 3

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an upholstery device for a sewing machine mainly used for sewing a cylindrical work cloth.
[0002]
[Prior art]
2. Description of the Related Art Cylindrical frames have been widely used for sewing cylindrical work cloths such as socks and wristbands. International Publication No. WO 00/53836 proposes an upholstery device for an embroidery sewing machine having a cylindrical frame. As shown in FIG. 12, in this conventional apparatus, a sewing window 52 is formed in an upper half portion of a peripheral wall of a cylindrical frame 51, a cylindrical work cloth is put on the sewing window 52, and the sewing window 52 is held by a cloth holding frame 53. Are driven outside the cylinder bed in the front-rear direction and the circumferential direction, and an embroidery pattern can be processed using a part of the opening range of the sewing window 52.
[0003]
[Problems to be solved by the invention]
However, according to the conventional cloth upholstery, since the sewing window 52 is formed on the peripheral wall of the cylindrical frame 51, in order to secure the rigidity of the cylindrical frame 51, the circumferential opening angle of the sewing window 52 must be 180 degrees. ° or less. For this reason, the sewing range in the circumferential direction of the cylindrical frame 51 is reduced, and the operation of the sewing machine is interrupted when the embroidery pattern is processed on the opposite surface of the cylindrical work cloth or in a wide range exceeding half a circumference. As a result, there is a problem that the work cloth needs to be re-tensioned, and the sewing efficiency is reduced.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a sewing machine upholstery device capable of expanding a sewing range in a circumferential direction of a cylindrical frame.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the upholstering device of the present invention includes a cylindrical frame driven in the front-rear direction and the circumferential direction outside the cylinder bed, and divides the cylindrical frame into a plurality of cylindrical elements. The cylindrical elements are connected by a rigid member at an interval in the front and back, and an open part that opens in the circumferential direction at an angle excluding the rigid member is formed in the middle part of the cylindrical frame, and a work cloth is attached to the cylindrical element before and after the open part. And a cloth holding member for holding the cloth.
[0006]
Here, the cylindrical element is not limited to a specific material as long as it has rigidity capable of preventing its own deformation, but is preferably formed by processing a metal plate. The number of cylindrical elements is not particularly limited, and may be two, three, or more. The front-rear interval of the cylindrical elements may be fixed at a constant interval, but is preferably adjustable according to the size of the embroidery pattern, the type of the work cloth, and the like. In this case, for example, at least one cylindrical element may be attached to the rigid member so that the position can be adjusted in the front-rear direction. In addition, a plurality of cylindrical elements may be connected by a rigid member that can expand and contract in the front-rear direction. In either configuration, the longitudinal length of the opening can be changed by adjusting the longitudinal distance between the cylindrical elements.
[0007]
The open portion is a portion that exposes the seam forming portion of the cylinder bed from the cylindrical frame, and the number thereof is not particularly limited. For example, one open portion may be formed by dividing the cylindrical frame into two. Alternatively, the cylindrical frame may be divided into three to form two open portions. According to this configuration, since the opening is formed between the adjacent cylindrical elements, the opening angle in the circumferential direction is equal to or more than half the circumference (for example, 200 ° or more), and is close to the entire circumference (for example, to 350 °). ) Can be expanded.
[0008]
The rigid member is not limited to a specific material and shape as long as it has rigidity capable of connecting cylindrical elements without twisting or axial displacement. However, from the viewpoint of increasing the opening angle of the opening, it is preferable to use a metal bar or a narrow thick plate (thickness greater than the thickness of the cylindrical frame). The number of cylindrical elements is not particularly limited, but is preferably one or two. In the two cases, they may be close to each other or may be far apart.
[0009]
The cloth holding member is not limited to a specific member. For example, a metal or resin plate or bar, a rubber band, a cloth belt, a surface fastener belt, or the like can be used. A flexible belt is preferable because it is easy to handle and does not easily cause a pressing mark. Further, a hook-and-loop fastener belt having both open ends is preferable in that the work cloth can be held with one touch without loosening.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is embodied in an embroidery sewing machine will be described with reference to the drawings. As shown in FIGS. 1 and 2, a head 1 and a cylinder bed 2 are installed vertically on a machine frame (not shown) of the embroidery sewing machine, a needle 3 is attached to a lower end of the head 1, and a front end of the cylinder bed 2 is provided. The hook 4 and the needle plate 11 are provided in the section. A Y-direction moving body 5 is supported on the upper surface of the cylinder bed 2, and a substrate 6 is vertically coupled to the moving body 5. On the front side of the substrate 6, three rollers 8 for supporting the drive ring 7 are arranged, and on the back side of the substrate 6, a pair of left and right guide rollers 10 which engage with the lower groove 9 of the cylinder bed 2 are provided. I have.
[0011]
An X-direction moving body 13 is supported on the Y-direction moving body 5 via a rail 12, and pulleys 14 are provided on both left and right ends of the moving body 13. A wire rope 15 is stretched around the pulley 14 in a state of being loosened by a spring 16, and an intermediate portion of the rope 15 is wound around the drive ring 7. The Y-direction moving body 5 and the X-direction moving body 13 are connected to a sewing frame driving device (not shown) of the embroidery sewing machine, and the drive ring 7 is moved by the Y-direction moving body 5 via the substrate 6 in the axial direction of the cylinder bed 2 (front and rear directions). ), And the drive ring 7 is reciprocated about the axis of the cylinder bed 2 by the X-direction moving body 13 via the wire rope 15.
[0012]
At the time of sewing a cylindrical work cloth such as a sock or a wristband, the cylindrical frame 19 of the upholstering device 18 is inserted outside the cylinder bed 2 and attached to the drive ring 7 at the attachment portion 19a at the rear end. A locking piece 20 and a flange 21 are protrudingly provided on the outer periphery of the mounting portion 19a (see FIG. 3), and a lever 22 that engages with the locking piece 20 and a spring 23 that elastically contacts the flange 21 are provided on the drive ring 7. Are provided. Then, the cylindrical frame 19 is loosely coupled to the drive ring 7 by a lever 22 via a spring 23, and is driven integrally with the drive ring 7 outside the cylinder bed 2 in the front-rear direction and the circumferential direction. The seam is formed on the cylindrical work cloth attached to the cylindrical frame 19 in cooperation with the above.
[0013]
As shown in FIGS. 3 to 6, the cylindrical frame 19 is divided into two front and rear cylindrical elements 25 and 26. The front cylindrical element 25 is formed in a ring shape shorter than the rear cylindrical element 26, and the rear cylindrical element 26 is attached to the drive ring 7 at an attachment portion 19a. The two cylindrical elements 25 and 26 are connected by a rigid member 27 at an interval in the front and rear. Thus, an opening 28 for exposing the needle plate 11 is formed at an intermediate portion of the cylindrical frame 19 so as to open in the circumferential direction at an angle excluding the rigid member 27. In this embodiment, the opening angle θ of the opening 28 (see FIG. 6) is about 345 °. One narrow metal bar is used for the rigid member 27.
[0014]
The rigid member 27 is provided so as to extend in the front-rear direction at the lowermost portion outside the cylindrical elements 25 and 26, and has a plurality of screw holes 30 formed in the longitudinal direction. The rear cylindrical element 26 is attached to a fixed position of the rigid member 27 by screws 31 which are screwed into two rear screw holes 30. The front cylindrical element 25 is attached to the rigid member 27 so as to be adjustable in the front-rear direction by two screws 32 selectively screwed into the front plurality of screw holes 30. By adjusting the mounting position of the front cylindrical element 25, the distance between the front and rear cylindrical elements 25 and 26 is changed, and the length of the opening 28 in the front and rear direction is determined by the size of the embroidery pattern and the type of the cylindrical work cloth W. And so on.
[0015]
The cylindrical work cloth W is attached to the outer surfaces of the front and rear cylindrical elements 25 and 26 while covering the open portion 28. The upholstering device 18 is equipped with two hook-and-loop fastener belts 33 each having an open end as a flexible belt, and the work cloth W is held by the cylindrical elements 25 and 26 before and after the opening 28 by the belt 33. . In addition, the cylindrical work cloth W may be stuck alone, or may be stuck on the back side with a thick core material made of a nonwoven fabric or the like superposed thereon. As the surface fastener belt 33, a belt provided with a surface fastener on the entire front and back surfaces, a belt provided with a surface fastener only at both ends, a belt base material woven with a rubber thread, and the like can be used.
[0016]
According to the upholstering device 18 configured as described above, since the cylindrical frame 19 is divided into two and the front and rear cylindrical elements 25 and 26 are connected by the rigid member 27, the rigidity of the cylindrical frame 19 is reduced. Instead, the opening 28 can be opened at a large angle in the circumferential direction to extend the sewing range of the cylindrical frame 19 in the circumferential direction. For this reason, even when the embroidery pattern is processed on the opposite surface of the cylindrical work cloth W or is processed in a wide range exceeding half a circumference, it is not necessary to re-stretch the work cloth W, and the sewing efficiency is improved. Further, by adjusting the mounting position of the front cylindrical element 25, the flat area of the opening 28 can be kept to a minimum, the depression of the work cloth W can be prevented, and the sewing accuracy can be improved.
[0017]
The present invention is not limited to the above-described embodiment, and each part of the cylindrical frame 19 can be modified and embodied as follows. In the following modified examples, the same or similar members as those of the above embodiment are denoted by the same reference numerals in the drawings, and detailed description will be omitted.
[0018]
In the first modified example shown in FIG. 7, the front and rear cylindrical elements 25 and 26 are connected by a rigid member 35 which can expand and contract in the front and rear direction. The rigid member 35 is composed of a convex piece 36 to which the front cylindrical element 25 is attached, a concave piece 37 to which the rear cylindrical element 26 is attached, and a plurality of screws 38 that connect the two elastically. I have. Then, by adjusting the entire length of the rigid member 35, the distance between the front and rear cylindrical elements 25 and 26 is changed, so that the length of the opening 28 in the front and rear direction can be changed.
[0019]
In the second modification shown in FIG. 8, sewing windows 40 and 41 are formed on the peripheral walls of the front and rear cylindrical elements 25 and 26, respectively. Then, one open portion 28 and two sewing windows 40 and 41 are selectively used so that embroidery patterns can be processed at three places of the cylindrical work cloth. In this case, since the rigidity of the cylindrical frame 19 is ensured by the rigid member 27, the sewing windows 40 and 41 can be formed at a large opening angle of half a circumference or more as necessary.
[0020]
In the third modification shown in FIG. 9, the cylindrical frame 19 is divided into three cylindrical elements 25, 26, 43. Each cylindrical element 25, 26, 43 is connected by a rigid member 27 at an interval in the front and back, and two open portions 28 are formed in an intermediate portion of the cylindrical frame 19. The front cylindrical element 25 and the intermediate cylindrical element 43 are both attached to the rigid member 27 so as to be adjustable in the front-rear direction, and by changing the relative distance between the three cylindrical elements 25, 26, 43, the two open portions 28 are formed. The length in the front-rear direction can be changed.
[0021]
In the fourth modification shown in FIG. 10, the front and rear cylindrical elements 25 and 26 are connected by two rigid members 27 approaching each other. According to this configuration, the opening angle of the opening 28 is somewhat reduced, but the two rigid members 27 reliably prevent the front and rear cylindrical elements 25 and 26 from being twisted, and provide the cylindrical frame 19 with higher rigidity. Can be. The two rigid members 27 may be largely separated from each other when the sewing area is divided into two.
[0022]
In the fifth modification shown in FIG. 11, the front and rear cylindrical elements 25 and 26 are connected to each other by a rigid member 27 extending inside the front and rear cylindrical elements. According to this configuration, in order to avoid interference between the rigid member 27 and the cylinder bed, it is necessary to form the rigid member 27 to be somewhat thin or to limit the rotation angle of the cylindrical frame 19. Since the cloth does not hit the rigid member 27, there is an advantage that the work cloth hardly has a tension mark.
[0023]
【The invention's effect】
As described in detail above, according to the sewing machine upholstering device of the present invention, the cylindrical frame is divided into a plurality of cylindrical elements, and each cylindrical element is connected with a rigid member at an interval in front and rear, so that the cylindrical There is an excellent effect that the sewing range in the circumferential direction of the frame can be expanded.
[Brief description of the drawings]
FIG. 1 is a side view of a main part of an embroidery sewing machine showing an embodiment of a cloth upholstery according to the present invention.
FIG. 2 is a front view showing a frame drive mechanism of the embroidery sewing machine.
FIG. 3 is a perspective view showing a cylindrical frame of the upholstery device.
FIG. 4 is a side view of the cylindrical frame.
FIG. 5 is a plan view of a cylindrical frame.
FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;
FIG. 7 is an exploded perspective view showing a first modification of the cylindrical frame.
FIG. 8 is a perspective view showing a second modification of the cylindrical frame.
FIG. 9 is a perspective view showing a third modification of the cylindrical frame.
FIG. 10 is a perspective view showing a fourth modification of the cylindrical frame.
FIG. 11 is a perspective view showing a fifth modification of the cylindrical frame.
FIG. 12 is a perspective view showing a conventional upholstery device.
[Explanation of symbols]
2 Cylinder bed 3 Needle 4 Hook 7 Drive ring 11 Needle plate 18 Clothing device 19 Cylindrical frame 25 Front cylindrical element 26 Rear cylindrical element 27 Rigid member 28 Opening section 33 Surface fastener belt 35 Rigid member 43 Intermediate cylindrical element W Processing cloth

Claims (4)

A cylindrical frame that is driven in the front-rear direction and circumferential direction outside the cylinder bed, divides the cylindrical frame into a plurality of cylindrical elements, and connects each cylindrical element with a rigid member at intervals in the front-rear direction; Sewing machine cloth, characterized in that an opening part which opens in the circumferential direction at an angle excluding the rigid member is formed in an intermediate part of the frame, and a cloth holding member which holds the work cloth on the cylindrical element before and after the opening part is provided. Tensioning device. 2. The upholstery machine according to claim 1, wherein at least one cylindrical element is mounted on the rigid member so as to be adjustable in the front-rear direction. 2. The upholstery device for a sewing machine according to claim 1, wherein a plurality of cylindrical elements are connected by a rigid member that is extendable and contractible in the front-rear direction. The sewing machine upholstering apparatus according to claim 1, 2 or 3, wherein a soft belt is used as the cloth holding member.

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