JP2018130518A - Fabric holding device for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric holding device for sewing machine, which can mechanically perform an assisting function by a left hand of a sewing operator, and which can execute proper and favorable hem sewing by avoiding application of a surplus load on a sewing place due to positional deviation and twist and avoiding occurrence of unevenness in fabric feeding speed irrespective of a skill level of the sewing operator.SOLUTION: A fabric holding device H is attached to a sewing machine M including a needle plate 2, a needle 1 and a fabric pressing metal 4 movable up/down. At a position further on an upstream side in a sewing advance direction Y than a needle location part of the needle plate 2 and separated laterally outward from a sewing machine body 20 in a direction substantially orthogonal to the sewing advance direction Y, a fabric holding tool 6 capable of holding another end portion Wb side of a fabric is provided by being supported by a fixing frame 8. The fabric holding tool 6 can drive and rotate around a specific shaft center or can drive and move in the sewing advance direction while being synchronized and interlocked with a sewing operation of one end portion Wa of the fabric.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fabric gripping device attached to various sewing machines. Specifically, for example, a two-needle type horizontal cylindrical double chain stitch sewing machine is used to hem-sew the entire hem of a round fabric such as a T-shirt to prevent fraying, or a single skirt, not a ring. Open the fabric of the material and fold the hem in half and sew the hem, or use the edge stitching machine, the entire circumference of the overlapped part of one end of the round fabric, or one skirt instead of a ring The present invention relates to a fabric gripping apparatus suitable for a case where a fabric of a material is opened and a hem is folded in half to sew the hem. Hereinafter, in the present specification, each of the above-mentioned stitches is expressed as a hem stitch.

  For example, as shown in FIG. 8, when a hem sewing of a round fabric W such as a T-shirt is performed using a double chain stitch sewing machine M, conventionally, a sewing manufacturer has a hem portion Wa on one end side with a right hand. While guiding to the sewing part S of the sewing machine M and guiding the feed, the other end part Wb of the circular fabric W is bundled with the left hand and lifted slightly above the hem part Wa to hold it, so that the hem sewing progresses. In addition, the hem stitching is assisted by turning the other end Wb on the left hand side in the direction indicated by the arrow.

  In addition, as shown in FIG. 9, when a hem is folded in half and a hem is sewn in a state where a skirt is not ring-shaped but a single piece of fabric W is opened using a double chain stitch sewing machine M, The sewing manufacturer holds the hem part Wa at one end with the right hand and guides the feed by guiding it to the sewing part S of the sewing machine M, while moving the other end part Wb of the fabric W slightly above the hem part Wa with the left hand. The hem stitching was assisted by grasping lightly in a lifted manner and feeding and guiding the other end portion Wb on the left hand side in the direction indicated by the arrow in accordance with the progress of the hem stitching.

  As described above, conventionally, the sewing manufacturer has the fabric other end portion Wb opposite to the hem portion Wa, which is the sewing location of the fabric W, with the left hand and lifts slightly upward from the hem portion Wa. Assist the sewing with both hands so that the load due to the weight of the fabric W or the twist of the middle portion of the fabric is not applied to the hem portion Wa by turning the other end portion Wb as the hem sewing progresses. As a result, the skirt portion Wa is prevented from being displaced to the left from the sewing portion S of the sewing machine M, the intermediate portion of the fabric W being twisted, and further being not fed at an appropriate speed in the sewing progress direction. Appropriate and good hem sewing.

  However, as described above, in order to perform the left hand work (assist function) to prevent the displacement of the sewing location and the twist of the fabric, or to maintain the fabric feed speed in the sewing progress direction at a uniform speed, Sewing manufacturers themselves have to master a very high level of skill, and in the case of sewing manufacturers with a low level of proficiency, the hem part is displaced with respect to the sewing part of the sewing machine during hem sewing, and the middle part of the fabric is twisted. In addition, it is difficult to assist the cloth feeding speed in the sewing progress direction so as not to vary, and there is a problem that appropriate and good hem sewing cannot be executed.

  The present invention has been made in view of the above circumstances, and can perform the assist function by the sewing manufacturer's left hand mechanically, regardless of the level of proficiency of the sewing manufacturer. It is an object of the present invention to provide a cloth holding device for a sewing machine capable of performing proper and good hem sewing while avoiding applying an excessive load and causing variations in the cloth feeding speed.

  In order to achieve the above object, a cloth gripping device for a sewing machine according to the present invention includes a needle plate that sets one end of the cloth and guides feeding in a predetermined sewing progress direction, and a needle drop portion formed on the needle plate. A cloth gripping device attached to a sewing machine having a needle configured to move up and down so as to pass through and a cloth presser that can be moved up and down, on the upstream side in the sewing progress direction from the needle drop portion In addition, a cloth end gripping tool capable of gripping the other end side of the cloth is supported by a fixed frame at a position spaced laterally outward from the sewing machine main body in a direction substantially orthogonal to the sewing progress direction. The cloth end gripping tool is configured to be capable of being driven to rotate around a specific axis or driven to move in the sewing progress direction in synchronization with the sewing operation of one end of the cloth.

  According to the cloth gripping device for a sewing machine according to the present invention having the above-described features, for example, a skirt of a round fabric such as a T-shirt or a skirt fabric of one sheet is opened and the skirt is folded in half. When sewing hems, use the right hand of the sewing manufacturer to set one end of the fabric to be sewn on the needle plate, while the other end of the fabric is held by the fabric end gripper to start sewing. Previously, it is possible to hold the other end of the fabric at a position upstream of the needle drop portion in the sewing progress direction and spaced laterally outward from the sewing machine main body. In addition, as the sewing machine starts operating, the cloth end gripping tool gripped at the other end of the cloth is driven and moved around a specific axis in the direction of driving rotation or sewing in synchronization with the sewing operation of the one end of the cloth. By doing this, it is possible to avoid as much as possible that extra load due to fabric weight or twisting of the middle part of the fabric is applied to the hem portion that becomes the sewing location during a predetermined sewing operation, or that the fabric feed speed varies. is there. That is, the work (assist function) of the left hand of the sewing manufacturer can be mechanically performed with the cloth edge gripping tool. Therefore, regardless of the level of proficiency of the sewing manufacturer, it is possible to avoid excessive load due to misalignment or torsion at the sewing location of the fabric, or to generate variations in the fabric feed speed as much as possible, and to ensure proper and good hem sewing. There is an effect that can be executed.

  In the cloth gripping device for a sewing machine according to the present invention, as an application target sewing machine, an overlapping portion formed by folding back one end portion of the cloth is set, and the feeding of the overlapping portion in the sewing progress direction is guided. A sewing machine for hem sewing provided with the needle plate, the needle, and the presser foot, and an overlapping portion formed by folding one end portion of a round fabric, and setting the overlapping portion in the sewing progress direction The needle plate for guiding the feed of the needle, a plurality of needles arranged in parallel in a direction substantially orthogonal to the sewing progress direction, and one side portion in the parallel direction of the plurality of needles holding a looper thread A looper capable of moving back and forth in a direction substantially perpendicular to the sewing progress direction across the other side portion and capturing a plurality of needle thread loops formed by the plurality of needles under the needle plate during the advancement operation; The round fabric is prepared by sewing operation. A double chain stitch sewing machine configured to form a double chain stitch on the entire circumference of the overlapped portion of the end portion, or an overlapped portion formed by folding one end of a round fabric is set. The needle plate for guiding the feeding of the overlapped portion in the sewing progress direction, and the needle configured to move up and down so as to hold the needle thread and pass the needle drop portion formed on the needle plate And a looper that holds a looper thread, and is an edge stitch machine that is configured to form stitches of edge stitches on the entire circumference of the overlapping portion of the one end of the round fabric cloth by a sewing operation. There may be.

A double chain stitch sewing machine configured to form a double chain stitch on the entire circumference of the overlapping portion of one end of the round fabric, and an edge on the entire periphery of the overlapping portion of the one end of the round fabric. In the case where a round fabric sewing edge sewing machine configured to form an over stitch stitch is applied, the fabric end gripper can be driven and rotated around a vertical or substantially vertical axis. It is preferable to be configured.
In this case, the other end of the fabric gripped by the fabric end gripper during sewing to form the seam around the entire circumference of the overlapped portion of one end of the round fabric is rotated for the entire circumference sewing of the one end of the fabric. It can be rotated according to the movement, and the load applied to the sewing location can be more reliably reduced by twisting of both ends of the fabric.

In the cloth holding device for a sewing machine according to the present invention, it is preferable that the cloth edge holding tool is composed of a pair of holding pieces that can be driven and opened via a cylinder.
In this case, the other end of the fabric can be securely gripped by a pair of gripping pieces that are driven open and closed. For example, when the other end of the fabric is simply held in a hooked state. In comparison, the desired assist function by the fabric edge gripper can be achieved reliably and stably.

Further, in the cloth gripping device for a sewing machine according to the present invention, the cloth edge gripper is driven to rotate less than one rotation around the axis in synchronization with the sewing operation of the sewing machine, and the other end of the cloth is It is preferable that the origin is automatically returned by rotating in the opposite direction in conjunction with the rise of the fabric presser foot after release of gripping.
In this case, an extra load is applied to the sewing portion of the fabric by rotating the fabric end gripping tool that grips the other end of the fabric to a rotation less than one rotation around a specific axis in synchronization with the sewing operation of the sewing machine. It is not necessary to squeeze the fabric due to excessive rotation, and after the sewing operation, the fabric end gripper after releasing the other end of the fabric is automatically interlocked with the rise of the fabric presser foot. It is possible to return to the state before the start of sewing (origin return), and preparation for the next sewing can be made quickly.

Furthermore, in the cloth gripping device for a sewing machine according to the present invention, it is preferable that the cloth gripping tool is supported so that its position can be adjusted in the vertical direction and the direction substantially perpendicular to the sewing progressing direction with respect to the fixed frame.
In this case, the position of the fabric end gripper is approximately orthogonal to the vertical direction and the sewing progress direction according to the size of the fabric to be sewn, particularly the length dimension from one end of the fabric to the other end, the fabric form, and the weight. By adjusting the position in the sewing direction, regardless of the size, form, and weight of the fabric, the other end of the fabric is gripped so that no extra load is applied to the sewing location at one end. The sewing work can be assisted accurately.

1 is an overall perspective view of a two-needle type horizontal cylindrical double chain stitch sewing machine according to an embodiment of the present invention and a cloth gripping device attached to the sewing machine. It is a whole front view of a sewing machine same as the above and a cloth grasping and feeding device. It is a whole top view of a sewing machine same as the above and a cloth grasping and feeding device. It is a whole left side view of a sewing machine same as the above and a cloth grasping and feeding device. It is arrow A figure of FIG. FIG. 3 is a B view of FIG. 2. It is a whole perspective view which shows the cloth holding state at the time of hem sewing of a round cloth. It is a whole perspective view explaining the assist state of the cloth edge part at the time of hem sewing of the conventional round thing cloth. It is a whole perspective view explaining the assist state of the cloth edge part at the time of hem sewing of the conventional opening cloth.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall perspective view of a two-needle type horizontal cylindrical double chain stitch sewing machine and a cloth holding device attached to the sewing machine according to an embodiment of the present invention, and FIGS. FIG. 5 is an overall front view, an overall plan view, and an overall left side view of the feeder, FIG. 5 is an arrow A view of FIG. 3, and FIG. 6 is an arrow B view of FIG.

  In the two-needle type horizontal cylindrical double chain stitch sewing machine M, a sewing machine arm part 21 and a sewing machine bed part 22 extend substantially parallel to each other from the upper and lower parts of the sewing machine body 20 toward the left side. . Inside the sewing machine arm portion 21, a needle driving mechanism that reciprocates up and down two needles 1, 1 (see FIG. 2) arranged in parallel in a direction substantially orthogonal to the sewing machine main shaft and the sewing progress direction Y. The presser foot 4 and the presser foot raising / lowering drive mechanism for driving the presser foot 4 up and down and the power transmission mechanism to each of these drive mechanisms are incorporated, but these drive mechanisms and power transmission mechanisms are well known. The illustration and detailed description are omitted.

  A needle plate 2 having a needle drop portion that forms a needle drop position is fixed to the upper surface portion of the sewing bed portion 22, and the needle plate 2 is located on the needle plate 2 below the needle plate 2. The fabric lower feed dog 5 that intermittently forcibly transports the fabric W set in the sewing progress direction Y, and holds the looper thread, and advances and retreats in the left-right direction substantially perpendicular to the up-and-down double motion path of the needle 1 A looper that captures two needle thread loops formed under the needle plate 2 by the needles 1 and 1 during the advance operation, a thread trimming device, and the like are incorporated. Here, since the configuration and operation of the looper, the thread trimming device, and the looper advance / retreat operation mechanism are well known, illustration and detailed description thereof are omitted.

  The two-needle type double chain stitch sewing machine M configured as described above is accompanied by a cloth gripping device H that is separate from the sewing machine M. The cloth gripping device H is separated from the sewing machine body 20 to the left lateral outer side in a direction substantially orthogonal to the sewing progress direction Y on the upstream side in the sewing progress direction Y from the needle drop portion of the needle plate 2 in the sewing machine M. The fabric end gripping tool 6 that can be gripped on the other end side opposite to one end of the fabric W that is arranged at the position and is sewn by the sewing machine M, and the fabric end gripping tool 6 about the vertical vertical axis. It has a stepping motor 7 for driving and rotating, and a fixed frame 9 for fixing and supporting a horizontal base 8 on which the dough edge gripping tool 6 and the stepping motor 7 are mounted in a vertical position relationship.

  As shown in FIGS. 5 and 6, the dough end gripping tool 6 is swung around a horizontal axis through the expansion and contraction of a plate-shaped fixed gripping piece 6 </ b> A and an air cylinder (not shown). The movable gripping piece 6B can be freely opened and closed with respect to the fixed gripping piece 6A. The fabric end gripping tool 6 composed of a pair of gripping pieces 6A and 6B receives a sewing end signal from the sewing machine M and switches the solenoid valve for controlling the supply of air to the air cylinder in one direction to contract the air cylinder. As a result, the movable gripping piece 6B is driven and opened with respect to the fixed gripping piece 6A to release the grip of the fabric end, and the operating piece 15a of the limit switch 15 attached to the horizontal base 8 is pushed and operated. By switching the electromagnetic valve in the reverse direction and extending the air cylinder, the movable gripping piece 6B is driven and closed with respect to the fixed gripping piece 6A to grip the end of the fabric.

  The cloth edge gripping tool 6 is rotated around the vertical vertical axis in the state shown in FIG. 6 so as to be synchronized with the sewing operation of the sewing machine M by the driving rotation of the stepping motor 7 which starts the operation upon receiving an operation start signal of the sewing machine M. It is rotated in the direction of arrow R. The drive rotation of the dough end gripping tool 6 around the axis is set to 1 rotation (360 degrees) or less.

  Further, a switch push cam 10 that rotates integrally with the fabric end gripping tool 6 around the axial center in the vertical direction is fixed to the output shaft of the stepping motor 7 and directly below the horizontal base 8. And the cloth end gripping tool 6 causes the cloth end gripping tool 6 to grip the cloth end before starting sewing at a position corresponding to the rotation locus of the tip of the switch push cam 10, that is, the cloth end gripping tool. 6 is provided with a switch operating piece 11a of a limit switch 11 for stopping the operation of the stepping motor 7. With the above-described configuration, the fabric end gripping tool 6 is moved in the opposite direction, that is, the arrow L in FIG. 6 by the reverse rotation of the stepping motor 7 interlocked with the lifting of the fabric presser foot 4 after releasing the gripping of the fabric end. The reverse rotation of the stepping motor 7 is stopped when the switch push cam 10 comes into contact with the switch operating piece 11a and the limit switch 11 is pushed by the rotation. The dough end gripping tool 6 is configured to automatically return to the origin.

Further, a slide frame 14 that can be slidably moved and fixed in the sewing progress direction Y of the sewing machine M through a long hole 12 and a fixture 13 is provided at the distal end portion of the fixed frame 9. A horizontal base 8 is fixedly supported. Although not shown, the fixed frame 9 is configured to be movable and fixed in a vertical direction and a direction X substantially perpendicular to the sewing progress direction Y. With such a configuration, the cloth edge gripping tool 6 is supported so that its position can be adjusted with respect to the fixed frame 9 in the vertical direction, the sewing progress direction Y, and the direction X substantially perpendicular to the sewing progress direction Y.
By adopting such a configuration, the position of the fabric end gripping tool is changed in the vertical direction and in accordance with the size of the fabric to be sewn, in particular, the length dimension from one end of the fabric to the other end, the fabric form, weight, etc. Regardless of the size, form, and weight of the fabric to be sewn by adjusting the position in the direction substantially perpendicular to the sewing progress direction, the other end of the fabric is subjected to an extra load on the sewing portion at one end. The sewing operation can be assisted by holding the sewing machine in a state where it is not applied.

  Next, using the two-needle type horizontal cylindrical double chain stitch sewing machine M and the fabric gripping device H according to the present embodiment configured as described above, a round fabric W such as a hem of a T-shirt is used. The sewing operation for performing the hem sewing will be described with reference to FIG.

  First, the fabric presser 4 is driven up and the fabric end gripping tool 6 of the fabric gripping device H is driven and released so that the pair of gripping pieces 6A and 6B are in the origin position and the round fabric W After setting the fabric portion (sewing portion) Wa, which is overlapped by folding the fabric edge to the fabric back side, at one end side hem portion, the presser foot 4 is driven down while the circular object is The other end portion Wb of the fabric W is inserted between the pair of gripping pieces 6A and 6B of the fabric end gripping tool 6 in the fabric gripping device H, and the operating piece 15a of the limit switch 15 is manually pushed to operate the air. The movable gripping piece 6B is driven and opened with respect to the fixed gripping piece 6A by the extension operation of the cylinder to grip the other end portion Wb of the round cloth W.

  In this state, by starting the rotation operation of the horizontal cylindrical double chain stitch sewing machine M, the sewing portion Wa of the round fabric W is applied to the lower surface feed dog 5 which acts on the lower surface of the sewing portion Wa and the upper surface. A series of sewing operations such as the upward and downward movements of the left and right needles 1 and 1 accompanying the rotational operation of the sewing machine M, the forward and backward movement of the looper, etc. By the operation, hem stitching for forming double chain stitches on the entire circumference of the sewing portion (overlapping fabric portion) Wa of the round fabric W is performed.

  At the time of hem sewing as described above, the fabric end gripping tool 6 that grips the other end portion Wb of the round fabric W is driven and rotated by the stepping motor 7 that operates in synchronization with the sewing operation of the fabric one end hem portion Wa. Is rotated in the direction of arrow R in FIG. 6 about the vertical vertical axis. Due to the rotation of the cloth edge gripping tool 6, an extra load is applied to the hem part Wa, which becomes a sewing part during a predetermined sewing operation, due to the weight of the cloth, the twist of the cloth middle part, or the like. It is possible to avoid the occurrence of variations in the dough feeding speed. As a result, the cloth edge gripping tool 6 of the cloth gripping apparatus H mechanically performs the left hand work (assist function) of the sewing manufacturer at the time of the same sewing as in the prior art. Regardless of this, it is possible to perform proper and good hem sewing without applying an extra load due to displacement or twisting to the sewing location of the round fabric W, and without causing variations in the fabric feed speed.

  When the predetermined hem stitching in which a double chain stitch is formed on the entire circumference of the one end portion Wa of the round fabric W is completed and the thread cutting by the thread trimming device is completed, the fabric edge gripper The pair of gripping pieces 6A and 6B are driven and opened to release the grip of the other end portion Wb of the round fabric W, and the fabric presser 4 is driven up. In this state, the hem sewing is completed. It is possible to reset the round fabric W from the sewing machine M.

  Then, the stepping motor 7 reversely rotates in conjunction with the rising of the fabric presser foot 4 and the fabric end gripping tool 6 rotates in the direction of the arrow L in FIG. The switch pushing cam 10 that rotates in contact with the switch actuating piece 11a pushes the limit switch 11, whereby the reverse rotation of the stepping motor 7 is stopped and the dough end gripping tool 6 becomes a pair of gripping pieces 6A. , 6B is automatically returned to the original position in the opened state and stopped, and preparation for the next sewing is quickly prepared.

  In the above-described embodiment, the other end portion Wb of the round fabric W is gripped by the fabric end gripping tool 6, and the fabric end gripping tool 6 and the gripped fabric other end portion Wb are synchronized with the sewing operation. By turning it around the vertical vertical axis, an extra load is applied to the hem portion Wa that becomes the sewing location due to the weight of the fabric or the twist of the middle portion of the fabric. Although the description has been made with the assist function that does not cause variations in the fabric feed speed, other than this, for example, as shown in FIG. When the hem portion Wa is folded in half and the hem is sewn with the single fabric W open, the other end portion Wb of the fabric W is slightly lifted above the sewing portion Wa on one end side. Fabric edge Is gripped jig 6, of course it may be exhibited assist function of heme sewing by guide sends the cloth end gripper 6 in accordance with the progress of the heme sewing sewing traveling direction.

  Further, the sewing machine to which the fabric edge gripping device of the present invention is attached is not limited to the above-described multi-needle type horizontal cylindrical double chain stitch sewing machine, and the edge sewing is performed on the entire circumference of the overlapping portion on one end side of the circular fabric. The sewing machine may be an edge stitch sewing machine that forms the seam.

  In the above-described embodiment, the grip release operation of the cloth edge gripping tool 6 is automatically performed in response to a sewing end signal from the sewing machine M. However, the grip release operation is performed by pushing the push button. You may comprise.

  Further, in the above embodiment, the fabric end gripping tool 6 is described as being composed of the fixed gripping piece 6A and the movable gripping piece 6B that can be driven and opened with respect to the fixed gripping piece 6A. The gripping pieces may be opened and closed by swinging each other or may be of a pair of springs.

DESCRIPTION OF SYMBOLS 1 Needle 2 Needle plate 4 Material presser 5 Raw underground feed dog 6 Material edge gripping tool 6A, 6B A pair of gripping pieces 7 Material end gripping tool driving rotation stepping motor 8 Fixed frame M Double chain stitch sewing machine H Material gripping Device W Sewing fabric (round fabric)
Wa Sewing part on one end side Wb Other end part Y Sewing direction

Claims (7)

A needle plate which sets one end of the fabric and guides feeding in a predetermined sewing progress direction, a needle configured to move up and down so as to pass a needle drop portion formed on the needle plate, and a fabric presser capable of moving up and down A cloth holding device attached to a sewing machine with gold,
A fabric end gripper that can grip the other end side of the fabric at a position that is upstream of the needle drop portion in the sewing progress direction and spaced apart from the sewing machine body in a direction substantially perpendicular to the sewing progress direction. Is supported by a fixed frame,
This cloth edge gripper is configured to be capable of being driven to rotate around a specific axis or driven to move in the direction of sewing in synchronization with the sewing operation of one end of the cloth. apparatus. The sewing machine sets the overlapping portion formed by folding back one end portion of the cloth and guides the feeding of the overlapping portion in the sewing progress direction, the needle, the presser foot, The sewing machine cloth gripping apparatus according to claim 1, wherein the sewing machine is a hem-sewing sewing machine. The sewing machine sets an overlapped portion formed by folding one end of a circular fabric and guides the feed of the overlapped portion in the sewing progress direction, and substantially orthogonal to the sewing progress direction A plurality of needles arranged in parallel in the direction to be held, and a direction substantially perpendicular to the sewing progress direction between the one side portion and the other side portion in the parallel direction of the plurality of needles holding a looper thread A looper that captures a plurality of needle thread loops formed under the needle plate by the plurality of needles during the advancing operation, and the entire circumference of the overlapped portion of the one end of the round fabric by sewing operation A double chain stitch sewing machine configured to form a double chain stitch seam, and
The cloth holding device for a sewing machine according to claim 1, wherein the cloth edge holding tool is configured to be driven and rotated about a vertical or substantially vertical axis. The sewing machine holds the needle thread and the needle plate for setting the overlapping portion formed by folding one end of the round fabric and guiding the feeding of the overlapping portion in the sewing progress direction. The needle plate includes a needle configured to be movable up and down so as to pass through a needle drop portion formed on the needle plate, and a looper that holds a looper thread. An edge stitch sewing machine configured to form an edge stitch seam; and
The cloth holding device for a sewing machine according to claim 1, wherein the cloth edge holding tool is configured to be driven and rotated about a vertical or substantially vertical axis. The cloth holding device for a sewing machine according to any one of claims 1 to 4, wherein the cloth edge holding tool includes a pair of holding pieces that can be driven and opened via a cylinder. The cloth end gripping tool is driven to rotate about one rotation or less around the axis in synchronization with the sewing operation of the sewing machine, and interlocked with the rise of the cloth presser foot after releasing the grip of the other end of the cloth. The sewing machine cloth gripping device according to any one of claims 1 to 4, wherein the sewing machine is configured to automatically return to the origin by rotating in a direction opposite to the above. The cloth end gripping tool is supported so as to be position-adjustable in a vertical direction and a direction substantially orthogonal to a sewing progress direction with respect to the fixed frame, respectively. The sewing machine cloth gripping device according to the description.

Images