TWI729090B - Sewing machine - Google Patents

Abstract

An object of the present invention is to provide a sewing machine which allows a defect in which a position of an edge of clothing fabric after a cut is partially displaced from a seam to be suppressed more easily and reliably than before. A sewing machine includes a fabric presser 5 adapted to hold clothing fabric to be sewn, from above, in which the fabric presser 5 includes: a fabric presser body 51 located above a fabric feeding path, a needle location hole 53 configured to penetrate the fabric presser body 51 in an up and down direction and adapted to allow needles moving up and down for sewing to pass, a cutting unit 7 located closer to a source side than the needle location hole 53 in a fabric feeding direction, and adapted to cut at least one end of the clothing fabric sent into the fabric presser 5 and form an edge along the fabric feeding direction on the cut end, and a fabric guide 8 fixed to the fabric presser body 51 between the needle location hole 53 and the cutting unit 7 and equipped with a guide plane 821 adapted to guide the edge of the clothing fabric to below the needle location hole 53 after a cut made by the cutting unit 7, and the fabric guide 8 is configured to be movable relative to the fabric presser body 51 in a direction intersecting the guide plane 821.

Description

Sewing machine

The present invention relates to a sewing machine provided with a cutting section that cuts a fabric before sewing.

The grey fabric press is equipped with a cutting part, for example, the cutting part cuts the ends of the sequentially sent grey fabrics, where the grey fabrics form an edge, and the ends of the grey fabric are overlapped so that one of the two edges is formed It is located above and the other is located below, and the overlapped part is fed below the needle drop hole provided in the grey fabric presser and then stitched. Therefore, for example, there are sewing machines that can form sewing products with cylindrical parts. For example, the sewing machine described in Japanese Patent Publication No. 59-34457.

The cutting part is provided with a fixed blade fixed to the main body of the grey fabric press, and a movable blade which can be approached and separated from the fixed blade. Each blade has a peak at the tip. When the movable blade is close to the fixed blade, the blades of each blade can be overlapped and cut off the grey fabric like scissors.

However, as shown in Figure 9, there will be (Especially when sewing the upper grey cloth KU located above), the seam S sewn at the end edge KUe has a problem of partial deviation and formation of a defective part X. The state shown in the figure is a defective portion X showing a state where the edge KUe of the upper fabric KU partially protrudes from the seam S. On the other hand, there is also a state where the edge KUe of the upper grey fabric KU is partially recessed with respect to the seam S. Once these conditions occur, the appearance of the sewn product will be poor. In response to the problem, by changing the position of each blade relative to the main body of the gray fabric presser, the offset adjustment of the cutting position of the gray fabric (upper gray fabric KU and lower gray fabric KL) in the horizontal direction (left and right direction) (for example, the applicant’s " FD-62DRY Instruction Manual”).

However, this adjustment is complicated because the positions of the fixed blade and the movable blade must be adjusted separately. In addition, due to the expansion and contraction of the cut grey fabric, the end edge position of the grey fabric will shift when it reaches the bottom of the pinhole. Therefore, the above-mentioned problems cannot be reliably suppressed.

Therefore, in view of the above-mentioned problems, the present invention provides a sewing machine that can more simply and reliably suppress the deviation of the edge of the cut grey fabric from the seam and other problems than before.

The sewing machine of the present invention has a gray fabric press for pressing the gray fabric before sewing from above, and the gray fabric press includes: a gray fabric press main body positioned above the gray cloth conveying path; and penetrates the vertical direction of the gray fabric press main body for sewing And the needle drop hole for the needle to move up and down; the needle drop hole is located on the conveying source side of the gray cloth conveying direction, and at least one end of the gray cloth fed into the gray cloth press piece is cut to form the edge along the gray cloth conveying direction The cutting part at the one end; and having the main body of the grey fabric holder fixed between the needle drop hole and the cutting part, and the grey fabric after the cutting part is cut, abuts against each other in a state of overlapping each other during sewing. The end edge of the upper grey fabric is used to guide the grey fabric toward the guide surface of the guide surface below the needle drop hole. The grey cloth guide can face the direction intersecting the guide surface with respect to the main body of the grey fabric press. mobile.

According to this structure, it is possible to guide the cut grey cloth by the cut section with the grey cloth guide, and send it to the bottom of the needle drop hole of the grey cloth press. In addition, the grey cloth guide moves toward the body of the grey cloth holder, and the guiding position of the grey cloth can be changed to a direction intersecting the guiding surface. Therefore, only by moving the grey cloth guide, the edge of the cut grey cloth can be aligned with the sewing position, and the adjustment is simple.

In addition, the above-mentioned guiding surface may be a flat surface along the conveying direction of the grey cloth.

According to this structure, the grey cloth sent below the pinhole can be surely guided along the guide surface of the plane.

In addition, the aforementioned grey cloth guide may be fixed to the aforementioned grey cloth holder body by a coupling means, and the aforementioned coupling means can perform operations for fixing and releasing the fixing from above.

According to this structure, the operator (operator of the sewing machine, etc.) can operate the coupling means from above, and can easily adjust the position of the cloth guide relative to the main body of the cloth presser at any time.

As described above, the present invention can more simply and reliably suppress the problem of deviation between the edge of the cut grey fabric and the seam portion than before.

2‧‧‧Arm

3‧‧‧Frame

4‧‧‧Pressure bar

5‧‧‧Grey cloth pressed parts

6‧‧‧Needle plate

7‧‧‧Cutting Department

8‧‧‧Grey cloth guide

9‧‧‧Grey Fabric Induction Department

51‧‧‧Gray cloth press body

52L‧‧‧Left presser foot

52R‧‧‧Right presser foot

53‧‧‧Pinhole

54‧‧‧Guide Space Department

55‧‧‧Guide groove

71‧‧‧Fixed blade

72‧‧‧Moving Blade

81‧‧‧Support

82‧‧‧Guide groove protrusion

83‧‧‧Screw

92‧‧‧Left guide

93‧‧‧Right guide

511‧‧‧Support

821‧‧‧Induction surface

8M‧‧‧Cross direction with the induction surface

Figure 1 is a perspective view showing the sewing machine of this embodiment.

Fig. 2 is a perspective view of the cloth presser of the sewing machine of this embodiment as viewed from the front and above.

Fig. 3 is a perspective view of the cloth pressing member in the sewing machine of the present embodiment viewed from the front and upward together with other members (lower guides) positioned in front of the cloth pressing member.

Fig. 4 is a perspective view showing the cloth presser of the sewing machine of this embodiment viewed from the front and bottom.

Fig. 5 is a perspective view of the sewing machine according to the present embodiment, showing a state where the pressing plate is removed with the cloth pressing member, as viewed from the lower front.

Fig. 6A is a schematic view showing a longitudinal section showing the state that the grey fabric is cut and fell down from the front to the rear (from the conveying source side in the conveying direction of the cloth to the conveying side).

Fig. 6B is a schematic view showing a longitudinal section showing the state that the grey fabric is cut and fell down from the front to the rear (from the conveying source side in the conveying direction of the cloth to the conveying side).

Fig. 6C is a schematic diagram showing a longitudinal section showing the state that the grey fabric is cut and fell down from the front to the back (from the conveying source side to the conveying side in the conveying direction of the cloth).

Fig. 6D is a schematic view showing a longitudinal section showing the state that the grey fabric is cut and fell down from the front to the rear (from the conveying source side to the conveying side in the conveying direction of the cloth).

Fig. 6E is a schematic view showing a longitudinal section showing the state that the grey fabric is cut and fell down from the front to the rear (from the conveying source side to the conveying side in the conveying direction of the cloth).

Fig. 7A shows a front view (a figure shown in front) of a modification of the grey cloth guide (upper grey cloth guide).

Figure 7B shows a bottom view of a modified example of the grey cloth guide (upper grey cloth guide).

Figure 7C shows a front view of another modified example of the grey cloth guide (upper grey cloth guide).

FIG. 7D shows a bottom view of another modified example of the grey cloth guide (upper grey cloth guide).

Fig. 8A is a front view showing a modified example of the grey cloth guide (upper grey cloth guide) together with a part of the grey cloth press.

Figure 8B is a front view showing a modified example of the grey cloth guide (upper grey cloth guide) together with a part of the grey cloth press.

Figure 8C is a front view showing a modified example of the grey cloth guide (upper grey cloth guide) together with a part of the grey cloth press.

Figure 9 is a schematic plan view showing a state where the end edge of the upper fabric is offset from the stitched seam portion and a problem occurs with the sewing start side as the upper side and the sewing end side as the lower side.

Next, an embodiment of the present invention will be described. In the following, the expression regarding the front-to-rear direction is the direction toward the worker (operator) who performs sewing as the front, and the direction away from the worker as the rear. In addition, the performance of up, down, left, and right is shown in the direction when the above-mentioned operator looks at the sewing machine. Regarding the expression of inside and outside, the center side in the left-right direction is the inside, and the opposite side is the outside. In addition, there are also places where the conveying direction of the grey cloth is used based on the direction. The conveying source side of the gray cloth conveying direction is the front side, and the conveying side is the rear side.

The sewing machine 1 of this embodiment is a let-off bar type flat chain stitch sewing machine. One example of this sewing machine 1 is used for sewing sleeves or body parts of sportswear, and trousers of underwear. As shown in Fig. 1, the sewing machine 1 is provided with a machine arm 2 extending in one direction on the upper part of the frame. The lower part of the frame is provided with a cylindrical base 3 extending in a direction different from the arm 2 in the front-rear direction. The front end of the arm 2 is bent at a substantially right angle, and faces the upper surface of the front end of the base 3. The arm 2 supports a pressing rod 4 extending downward. The pressing rod 4 is configured to be movable up and down. The support portion 511 (refer to FIG. 2) of the grey cloth presser is inserted through the lower end of the press rod 4, whereby the grey cloth presser 5 is installed.

The grey fabric presser 5 is a member that presses the grey fabrics KL and KU (see Fig. 6A to Fig. 6E) before sewing from above. The grey cloth presser 5 abuts against the needle plate 6 located on the upper surface of the machine base 3 as the press rod 4 descends. The respective grey fabrics KL and KU are clamped between the descending grey fabric presser 5 and the needle plate 6. In this state, the grey fabrics KL and KU are transported from the front to the back by a transport mechanism (not shown) that moves back and forth on the needle plate 6 on one side, and is moved up and down by a plurality of needles that pass through the needle drop hole 53 (Not shown, and the trajectory NL of the four needles moving up and down is indicated by a two-dot dashed line in Fig. 6E).

The grey cloth presser 5 mainly includes: the grey cloth presser main body 51, drop Pinhole 52, cutting part 7, grey cloth guide (upper grey cloth guide) 8.

The main body 51 of the cloth presser is located above the cloth conveying path from the front to the rear on the needle plate 6. The front part of the grey cloth presser body 51 is divided into two left and right strands, and two pressers (left presser foot 52L and right presser foot 52R) are formed parallel to each other and extend forward.

In addition, in the gray fabric presser main body 51 at a position corresponding to the needle below, the gray fabric presser main body 51 is penetrated in the vertical direction, and an oblong needle drop hole 53 extending in the left-right direction in plan view is formed.

The gray cloth as the object to be sewn (in this embodiment, it is two pieces of the lower gray cloth KL and the upper gray cloth KU, but for example, when sewing into a cylindrical shape, one gray cloth can be used to sew the two end edges of the gray cloth). Fig. 6A shows the setting in a state where the part including the end edges of the respective grey fabrics KL and KU is sandwiched between the left and right presser feet 52L, 52R and the needle plate 6. In addition, it is fed under the needle drop hole 53 by a conveying mechanism, and sewing is performed by a plurality of needles arranged side by side in the left-right direction.

The cutting part 7 is located on the front side (the conveying side of the conveying direction of the gray cloth) in the main body 51 of the gray cloth press member 51, and cuts at least one end of the gray cloth KL, KU fed into the gray cloth press member 5, and moves along the gray cloth The end edge in the conveying direction is newly formed at this end. The cutting part 7 of this embodiment cuts the opposite ends of the grey fabrics KL and KU fed into the grey fabric presser 5, and re-forms the edges along the conveying direction of the grey fabrics on the opposite ends of the grey fabrics KL and KU, respectively. . However, this is only one example, and the cutting part 7 is not limited to the aspect in which two pieces of grey fabrics KL and KU are cut. For example, the cutting part 7 may cut only one piece of upper grey fabric KU. The cutting part 7 has a fixed blade 71 and a movable Moving blade 72. As shown in Figs. 2 and 4, a fixed blade 71 is fixed to the left presser foot 52L. In addition, the movable blade 72 is held outside the right presser foot 52R. The movable blade 72 transmits driving force from the blade drive arm 73 (see FIG. 1) and moves back and forth in the left-right direction 7M. Between the left and right presser feet 52L and 52R is a guide space 54 that forms a front opening. In the middle of the guide space 54 in the front-rear direction, the fixed blade 71 and the movable blade 72 are positioned such that the blades face each other. Each of the grey fabrics KL and KU has the part close to the edge upright as shown in FIG. 6A, and is introduced into the guide space 54 in a state of overlapping on the needle plate 6. As shown in Fig. 6B, when each grey cloth KL and KU is clamped between the fixed blade 71 and the movable blade 72 and moves, by the overlap of the fixed blade 71 and the movable blade 72, they will be more than the respective blades 71, 72. Cut the part protruding upward. In addition, sewing is provided to the remaining portion below the blades 71 and 72.

As shown in Fig. 4, the front part of the grey fabric press body 51 is located behind the fixed blade 71 and the movable blade 72, and is formed with a guide groove 55 closed at the top and open at the bottom and front and rear. The inner surface of the guide groove 55 is curved, and as shown in FIG. 5, the width dimension (the dimension in the left-right direction) decreases toward the rear side and is connected to the needle drop hole 53. As shown in Fig. 6C to Fig. 6E, move along the respective grey fabrics KL and KU whose end edges are trimmed by the cutting part 7, so that the respective grey fabrics KL and KU fall horizontally, and the part including the end edge of the lower grey fabric KL is The part including the end edge of the upper grey cloth KU forms a belt-like overlapped state. In this state, the respective grey fabrics KL and KU are fed under the needle drop hole 53.

Below the main body 51 of the grey cloth press, as shown in Figure 4, Across the rear from the front ends of the left and right presser feet 52L, 52R, two presser plates 56L, 56R are attached to the left and right, respectively. As shown in Figs. 6A to 6E, the lower surface of the left pressing plate 56L abuts on the lower grey cloth KL, and the lower surface of the right pressing plate 56R abuts on the upper grey cloth KU. A part of each pressing plate 56L, 56R protrudes below the guide space 54 and the guide groove 55. For example, the left pressing plate 56L is provided with a protrusion 56La as shown in FIG. 4. As shown in FIGS. 6B to 6D, the protruding portion 56La is positioned above the lower gray fabric KL passing through the gray fabric presser 5, and can cause the lower gray fabric KL to fall close to the needle plate 6. As described above, each grey fabric KL, KU is shown in Figure 6A and Figure 6B by means of the above-mentioned protruding shape of each pressing plate 56L, 56R. The lower grey fabric KL can be positioned as shown in Figures 6C to 6E. Below, and the upper grey fabric KU is positioned above, the respective grey fabrics KL and KR are laid down.

In addition, in the cloth presser 5, the pre-cutting cloth guiding portion 9 is positioned forward of the cutting portion 7. As shown in FIG. 3, the pre-cut grey fabric guide portion 9 includes a lower guide 91, a left guide 92, and a right guide 93. The lower guide 91 fixes the front part to the machine base 3, and the rear part becomes a flat shape extending in the front-rear direction. A part of the front end side of the front part of the lower guide 91 is located in the guide space 54. In addition, the left guide 92 is fixed to the left presser foot 52L and protrudes from the guide space 54. In addition, the right guide 93 is fixed to the right presser foot 52R and protrudes from the guide space 54. With the pre-cutting grey fabric guide 9 constructed as described above, as shown in Figure 6A, the lower grey fabric KL and the upper grey fabric KU can be introduced along the left and right sides of the lower guide 91 sandwiched between the grey fabrics KL and KD. The guide space 54 can smoothly cut the grey fabrics KL and KU by means of the cutting part 7.

The upper cloth guide 8 as the cloth guide of the present invention is fixed to the cloth holder main body 51 between the needle drop hole 53 and the cutting portion 7 (this embodiment is the left presser foot of a part of the cloth holder main body 51). 52L). The upper cloth guide 8 has a guide surface 821 that guides the end edges of the respective cloths KL and KU after the cutting of the cutting portion 7 to the lower side of the needle drop hole 53.

As shown in Figure 5, the upper grey cloth guide 8 is L-shaped when viewed from the bottom, and has a plate-shaped support portion 81 extending in the left-right direction, and a plate-shaped support portion 81 extending rearward from the inner end of the support portion 81 Guide groove protrusion 82. In addition, the upper cloth guide 8 of the present embodiment is shown in FIG. 6C and FIG. 6D, and when viewed from the front and rear, the support portion 81 and the guide groove protrusion 82 are also in an L-shape in which the support portion 81 and the guide groove protrusion portion 82 are orthogonal to each other. The support part 81 is embedded in the groove part formed in the left presser foot 52L so that the lower surface and the lower surface of the left presser foot 52L may become the same surface. In addition, it is not limited to the same surface, and the lower surface of the support portion 81 may be positioned above the lower surface of the left presser foot 52L (as shown in Figure 5, when viewed from below, the support portion 81 is in a retracted state). The support part 81 has the width direction constant in the front-rear direction, and is slidable with respect to the groove part of the left presser foot 52L.

The upper cloth guide 8 is fixed to the main body 51 of the cloth pressing member by a screw 83 which is a coupling means. The supporting portion 81 has a screw hole formed with an internal thread, and a screw 83 penetrating the left presser foot 52L is locked into the screw hole. The upper cloth guide 8 can be moved in a direction 8M (left and right direction in this embodiment) intersecting the guiding surface 821 with respect to the cloth presser body 51 in a state where the screw 83 is loosened, and is fixed to the cloth in a state where the screw 83 is locked.压件 Main body 51. Since it can be moved as described above, the main body 51 of the cloth presser Among them, the through holes through which the screw 83 penetrates the upper and lower sides are long holes (not shown) extending in the left-right direction.

The guide groove protrusion 82 is positioned in the guide groove 55 from the rear of the self-cutting part 7 to the front of the needle drop hole 53. Since the guide groove 55 is gradually reduced in height from the front to the rear, the guide groove protrusion 82 also cooperates with this. As shown in Figure 5, it is roughly triangular when viewed from the side with the height gradually reduced from the front to the rear. shape. The inner surface of the guide groove protrusion 82 is the guide surface 821, which is a plane along the conveying direction of the grey cloth. The guide surface 821 can move in the direction 8M (left-right direction) orthogonal to the guide surface 821 by the sliding of the support portion 81 with respect to the left presser foot 52L. As shown in Fig. 6D and Fig. 6E, the leading surface 821 abuts on the upper grey fabric KU and cuts the edge produced by the cutting part 7. The end edge of the upper gray fabric KU cut by the fixed blade 71 and the movable blade 72 of the cutting portion 7 moves while moving along the flat guiding surface 821, and the end edge of the upper gray fabric KU is guided to the pinhole without being offset. 53 Perform sewing. As described above, by making the end edge of the upper grey cloth KU sent below the pin drop hole 53 along the flat guiding surface 821, the upper grey cloth KU can be reliably guided. In addition, as shown in FIG. 5, the rearmost end of the guiding surface 821 is located at a close position which is only slightly separated from the pin drop hole 53. Therefore, the guiding surface 821 can be sewn while maintaining the positioning state of the end edge of the upper fabric KU in the left-right direction. Thereby, the position of the end edge of the upper gray cloth KU positioned by the gray cloth guide 8 is unlikely to be deviated after leaving the guiding surface 821.

Fig. 6A to Fig. 6E roughly show the state changes of the respective grey fabrics KL and KU of the grey fabric presser 5. Hereinafter, the procedure of the grey fabric conveying will be described. Fig. 6A shows a position further forward than the cutting portion 7 of the guide space portion 54; Fig. 6B shows a position of the cutting portion 7; Fig. 6C shows a position further behind the cutting portion 7 of the guide space portion 54; and Fig. 6D shows The position near the front end of the guide groove 55, and the sixth (e) indicates the position near the rear end of the guide groove 55.

The lower gray cloth KL and the upper gray cloth KU are overlapped by a predetermined width from the end edge (the end edge before being cut by the cutting portion 7) by an operator or the like as shown in Fig. 6A. In each of the grey fabrics KL and KU, the overlapped thick parts are introduced into the guide space 54 in a state where they are erected on the needle plate 6. The lower grey cloth KL and the upper grey cloth KU introduced into the guide space 54 are as shown in Figure 6B, reaching the position between the fixed blade 71 and the movable blade 72 of the cutting part 7, and a new one is formed by the cutting of the blades 71 and 72. The edge is then sent to the rear as shown in Figure 6C and Figure 6D.

During the transfer of the respective grey fabrics KL and KU as described above, the lower grey fabric KL pressed by the left presser foot 52L is pressed downward by the protrusion 56La of the left presser plate 56L protruding into the guide space portion 54 along the upper surface of the needle plate 6. Fall down. On the other hand, the upper grey cloth KU pressed by the right pressing plate 56R falls down along the inner surface of the guide groove 55, overlaps the upper portion of the lower grey cloth KL on the needle plate 6, and is sent below the needle drop hole 53 in this state.

In this embodiment, the cloth presser 5 includes an upper cloth guide 8. Therefore, as shown in FIG. 6E, the end edge of the upper cloth KU formed by the cutting portion 7 abuts on the guiding surface 821 of the upper cloth guide 8 to complete the lodging of the upper cloth KU. And sew in this state. Thereby, the problem of the deviation between the edge of the cut grey fabric and a part of the seam can be reliably suppressed.

According to the grey cloth presser 5 of this embodiment constructed as described above, the upper grey cloth guide 8 can induce the grey cloth (especially the upper grey cloth KU) cut by the cutting portion 7 and fall down, and send it to the grey cloth presser 5 Drop below the pinhole 53. In addition, the movement of the upper grey cloth guide 8 relative to the grey cloth holder main body 51 can change the guiding position of the upper grey cloth KU to a direction that intersects the guiding surface 821. Therefore, only the upper cloth guide 8 is moved to make the sewing position coincide with the end edge of the upper cloth KU, which can be easily adjusted.

And, for example, even if the upper cloth guide 8 is slid to the left boundary, the edge of the upper cloth KU is still recessed with respect to the seam formed in the sewn product, there is a combination of the conventional fixed blade 71 and It is necessary to adjust the position of the movable blade 72 with respect to the main body 51 of the grey cloth holder. On the contrary, when the end edge of the upper grey cloth KU is protruding from the seam of the sewn product, the upper grey cloth guide 8 can be individually adjusted. Therefore, compared with the situation where the adjustment can be performed separately, since only the screw 83 is loosened to make the upper cloth guide 8 slide, the adjustment can be extremely simple compared with the conventional one.

However, the problem that the edge of the upper grey fabric KU after cutting is partly offset from the seam can be presumed to occur at the left-right position of the edge of the upper grey fabric KU after the cutting of the grey fabrics KL and KU at the cutting section 7. Tremor, or caused by the extension of part of the upper grey fabric KU. There are differences in flexibility and stretchability depending on the type of fabric. Therefore, it can be understood that the above-mentioned problem is caused by, for example, changing the type of fabric KU used for sewing. When using the cloth presser 5 of the present embodiment, it is extremely advantageous to respond to the case where the cloth type is changed as described above and can be sewn.

In addition, as a design treatment of the sewn product, even when the end edge of the upper gray fabric KU extends or sinks with respect to the seam, it can be easily performed by sliding the upper gray cloth guide 8 to expand the types of sewing. Extremely advantageous.

In addition, the screw 83 of the coupling means can perform fixing and releasing operations (locking operation and loosening operation) from above. Therefore, once the cloth presser 5 is removed from the sewing machine 1, even if it does not move from the needle plate 6, the operator only needs to operate the screw 83 from above with a screwdriver or the like, and the upper cloth guide 8 can be moved relative to the main body of the cloth presser at any time. 51 position adjustment.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the scope not departing from the gist of the present invention.

For example, the shape viewed from the bottom surface of the grey cloth guide is not limited to the L-shape as the upper grey cloth guide 8 of the above-mentioned embodiment is not limited to the L-shape, and it may be provided with a guide surface 821 and a support portion 81 for movably supporting the guide surface 821. In addition, even with the L-shape, the positional relationship of the guide groove protrusion 82 with respect to the support portion 81 in the front and rear direction is opposite to that of the upper fabric guide 8 of the above-mentioned embodiment, and the guide groove protrusion 82 may be from the inside of the support portion 81 A shape with a square end extending forward (see Figures 7A and 7B). In addition, for example, it may be T-shaped (see FIGS. 7C and 7D) or rectangular. In addition, the guide surface 821 is not limited to the flat surface as in the above-mentioned embodiment, and may be a curved surface. Alternatively, the bottom surface of the groove formed in the grey cloth guide may be provided as the guiding surface 821.

In addition, the front view and rear view of the grey cloth guide are also the same as the upper grey cloth guide 8 of the above-mentioned embodiment, which is not limited to the L-shape, for example For example, it can be horizontal and rectangular.

In the upper cloth guide 8 of the above embodiment, although the support portion 81 and the guide groove protrusion 82 are orthogonal, they may cross at an acute angle as shown in FIG. 8A. It can also cross at an obtuse angle as shown in Figure 8B. Moreover, although the guide groove protrusion 82 of the above-mentioned embodiment is a flat plate shape, it may be a curved plate shape as shown in FIG. 8C.

In addition, the movable direction of the grey cloth guide is that the upper grey cloth guide 8 of the above-mentioned embodiment is not limited to be movable in the direction orthogonal to the guiding surface 821 (left and right direction), and may be moved in an oblique direction relative to the guiding surface 821. .

In addition, the coupling means for fixing the cloth guide to the cloth holder main body 51 is not limited to the screw 83 of the above-mentioned embodiment. For example, a jig, etc., can use various means without penetrating means that can be fixed.

5‧‧‧Grey cloth pressed parts

7‧‧‧Cutting Department

8M‧‧‧Intersection direction with induced surface

9‧‧‧Grey Fabric Induction Department

51‧‧‧Gray cloth press body

52L‧‧‧Left presser foot

52R‧‧‧Right presser foot

53‧‧‧Pinhole

54‧‧‧Guide Space Department

55‧‧‧Guide groove

71‧‧‧Fixed blade

72‧‧‧Moving Blade

81‧‧‧Support

82‧‧‧Guide groove protrusion

83‧‧‧Screw

92‧‧‧Left guide

93‧‧‧Right guide

511‧‧‧Support

821‧‧‧Induction surface

Claims (3)

A sewing machine is provided with a gray fabric presser that presses a gray fabric before sewing from above. The gray fabric presser includes: a main body of the gray fabric presser located above the conveying path of the gray fabric; The sewing is carried out so that the needles that move up and down pass; the cutting part is located on the conveying source side of the gray cloth conveying direction than the needle drop hole, and at least one end of the gray cloth fed into the gray cloth press is cut to form the edge along the conveying direction On the one end; and the grey cloth guide, having the grey cloth holder body fixed between the needle drop hole and the cutting portion, and the grey cloth after the cutting portion is cut, abutting in a state of overlapping each other during sewing By becoming the edge of the upper grey cloth, the grey cloth is guided toward the guide surface below the needle drop hole, and the grey cloth guide can move relative to the grey cloth holder body in a direction intersecting the guide surface. Such as the sewing machine described in the first item of the scope of patent application, wherein the above-mentioned guiding surface is a flat surface along the conveying direction of the grey cloth. For example, the sewing machine described in item 1 or item 2 of the scope of patent application, wherein the gray cloth guide is fixed to the main body of the gray cloth press by a coupling means, The above-mentioned coupling means can be used for fixing and releasing the fixing from above.

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