JP2010075381A - Device for feeding loop material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent twist of a part of a loop material between its part which is sewn on a sewn product body and its part which is held by a clamping means during cloth feeding movements of a sewing machine and thereby to sew belt loops in a uniform shape and of high quality by the sewing machine. <P>SOLUTION: A control means 17 controls driving of a Y-direction moving means 12, a Z-direction moving means 13 or the like so that the clamping means 3 may move in the direction in which the part of the loop material 20 between its part which is held by the clamping means 3 and its part which is pressed by a pressure foot 23 loosens after the sewn product body 21 and the loop material 20 are pressed by the pressure foot 23 of the sewing machine 2 and before the sewing machine 2 sews the loop material 20 on the sewn product body 21 as it feeds the sewn product body 21 in accordance with the shape to be sewn. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a loop material supply device that supplies a loop material to a sewing position of a sewing machine that sews a loop material constituting a belt loop to a sewn product body.

  Conventionally, for example, a long loop constituting a belt loop in order to form a belt loop for inserting a belt through various sewing bodies such as a waist part of a pant or a skirt, and a waist part or a sleeve part of a coat. A sewing machine is used to sew a material to a sewn product body, and a loop material supply device that supplies a long loop material to a sewing position of the sewing machine is used (see, for example, Patent Document 1).

  Such a loop material supply device has a clamping means for holding the loop material, and a loop material is sewn at a sewing position of the sewing machine while holding a predetermined portion of the loop material by the clamping means. The clamping means is moved so as to retract the non-sewn portion of the material from the sewing position.

  For example, when the loop material is sewn to the sewn product main body with a linear wire rod type sewing shape, the loop material supply device described above includes a holding means in a state where the vicinity of one end portion in the longitudinal direction of the loop material is clamped. Move one end of the material so that it is located at the sewing position of the sewing machine. When the presser of the sewing machine is lowered and one end of the loop material is pressed, the loop material supply device moves in a direction away from the sewing position and waits in a state where the loop material is clamped.

  In this state, the sewing machine conveys the sewing product by the cloth conveying means in the width direction of the loop material in accordance with the wire rod type sewing shape so that the sewing portion of the loop material and the sewing product body is located at the sewing position of the sewing machine. While performing the cloth feed operation, the sewing needle is moved up and down to sew the loop material onto the sewing product body. In addition, when loop material is sewn to the sewing product body using a zigzag zigzag type sewing shape, the sewing machine conveys the sewing material body in a zigzag manner in the longitudinal direction of the loop material by the cloth conveying means. While performing the operation, the loop material is sewn to the sewing product body.

  When the sewing operation by the sewing machine is completed, the loop material supply device moves the clamping means for clamping the loop material so that the next sewing location in the loop material is located at the sewing position.

JP 2007-117770 A

  However, according to the conventional loop material supply device as described above, when the loop material is sewn to the sewn product main body by the sewing machine, the sewn product main body is conveyed according to the sewing shape by the cloth conveying means. It is made to wait in the state which stopped the clamping means which clamped. Therefore, when the part of the loop material sewn on the sewn product body moves together with the sewn product body by the cloth feeding operation of the sewing machine during the sewn operation, the part nipped by the clamping means remains in the nipped position. In some cases, the loop material is twisted between the two portions. In particular, when loop material with a long width is sewn to the sewing product body, the distance that the sewing material body and loop material are moved by the cloth feed operation is long, so the loop pulled by the part sewn on the sewing product body In some cases, the holding position of the material held by the holding means is shifted. If the sewing operation of the loop material is continued in such a state, the predetermined sewing portion of the loop material cannot be arranged at the sewing position of the sewing machine, and as a result, the intended belt loop shape is obtained. There has been a problem that the loop material cannot be sewn, and the shape of each belt loop becomes non-uniform, which may result in poor sewing.

  Further, in a state where the loop material is twisted as described above, the loop material supply device moves the clamping means so that the next sewing portion of the loop material is located at the needle drop point, so that one end portion of the loop material is moved to Z. When bent into a shape, the loop material cannot be stacked on top and bottom, and there is a problem that a so-called dog-ear with one protruding may occur.

  The present invention has been made in view of these points, and during the cloth feeding operation of the sewing machine, a twist occurs between a portion of the loop material sewn to the sewn product main body and a portion clamped by the clamping means. Accordingly, an object of the present invention is to provide a loop material supply device that can sew a belt loop with a uniform shape and high quality by a sewing machine.

  In order to achieve the above object, a feature of the loop material supply device according to the first aspect of the present invention is that the loop material constituting the belt loop is sandwiched by means for clamping, and each sewing point of the loop material is attached to the sewing product body. In the loop material supply device of the belt loop sewing machine, the control means includes the sewing means, comprising: a moving means for moving the clamping means to supply the belt means; and a control means for controlling at least the driving of the moving means. After the sewing machine main body and the loop material are pressed by the presser of the sewing machine, before the sewing machine sews the loop material to the sewing product main body while conveying the sewing machine main body according to the sewing shape, The moving means is moved so as to move the holding means in a direction in which the gap between the holding part by the holding means and the holding part by the presser in the loop material is loosened. There is a point to control the motion.

  According to the first aspect of the present invention, the control means performs sewing with the sewing machine after the loop material and the sewing product main body are pressed by the press and the loop material is held by the holding means. Before, the clamping means can be moved in a direction in which the gap between the clamping part of the loop member by the clamping means and the pressing part by the presser is loosened. As a result, when the loop material is sewn to the sewing product main body by the sewing machine, when the loop material is held by the holding means and the sewing material main body and the loop material are held while being held down by the presser, the holding portion and the holding portion of the loop material are held. Since the slack has occurred between the portions, it is possible to reliably prevent the twist from occurring between the sandwiching portion and the pressing portion in the loop material. Thereby, it can also prevent that the shift | offset | difference generate | occur | produces in the clamping position of the loop material in a clamping means.

  The loop material supply device according to a second aspect of the present invention is characterized in that in the loop material supply device according to the first aspect, the control means is provided between the clamping portion and the pressing portion of the loop material. The driving of the moving means is controlled so that the clamping means is lowered in the direction of loosening.

  According to the second aspect of the present invention, the control means performs sewing with the sewing machine after the loop material and the sewing product main body are pressed by the press and the loop material is held by the holding means. Before, the clamping means can be moved down in the direction in which the gap between the clamping part by the clamping means and the pressing part by the presser in the loop material is loosened. As a result, when the loop material is sewn to the sewing product main body by the sewing machine, when the loop material is held by the holding means and the sewing material main body and the loop material are held while being held down by the presser, the holding portion and the holding portion of the loop material are held. Since the slack has occurred between the portions, it is possible to reliably prevent the twist from occurring between the sandwiching portion and the pressing portion in the loop material. Thereby, it can also prevent that the shift | offset | difference generate | occur | produces in the clamping position of the loop material in a clamping means.

  As described above, according to the loop material supply device of the present invention, pulling or twisting occurs between the clamping portion of the loop material by the clamping means and the pressing portion by the cloth / loop pressing, or by the clamping means. It is possible to prevent a shift of the holding position of the loop material. As a result, the loop material supply device according to the present invention can sew the loop material into the intended belt loop shape, and can reliably prevent the occurrence of so-called dog ears. By supplying the material to the sewing machine, it is possible to sew the belt loop with a uniform shape and high quality by the sewing machine.

  Hereinafter, an embodiment of a loop material supply device according to the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing a loop material supply device according to the present embodiment and a sewing machine for sewing the loop material supplied by the loop material supply device to a sewn product body, and FIG. 2 is a loop material supply of FIG. It is a block diagram which shows the structure of an apparatus.

  As shown in FIG. 1, the loop material supply device 1 according to the present embodiment includes a clamping means 3 that clamps the loop material 20 in order to supply the loop material 20 constituting the belt loop to the sewing machine 2. The sewing machine 2 also has a cloth conveying means 30 for moving the sewn product main body 21.

  As shown in FIG. 3, the clamping means 3 includes a first clamping member 5 that abuts on the upper surface of the loop member 20 and a second clamping member 6 that abuts on the lower surface of the loop member 20. The loop member 20 is sandwiched by bringing the second sandwiching member 6 close thereto.

  An air cylinder 9 is attached to the clamping means 3 as a driving means for driving the first clamping member 5 and the second clamping member 6 in a direction in which they are in contact with and away from each other. The cylinder body 9a of the air cylinder 9 is attached to the first clamping member 5. The tip of the cylinder rod 9b of the air cylinder 9 is on the upper surface of the frame member 7 to which one end of the second clamping member 6 is fixed. It is attached. And the control means 17 provided with CPU which controls the drive of each part of the loop material supply apparatus 1 and the sewing machine 2 drives the cylinder rod 9b, and makes both the clamping means 3 and 4 contact and separate, The loop material 20 Is to be held and released.

  The connecting table 8 connected to the frame member 7 is supported by a support table 15 disposed on the opposite side of the holding means 3 from the side facing the sewing machine 2, and the holding means 3 is connected via the connecting table 8. The support base 15 is supported so as to be movable in the vertical direction.

  A fork member 25 having a pair of support portions 25a arranged in parallel to the sandwiching means 3 is provided on the side of the sandwiching means 3, and both the support portions 25a are orthogonal to the axial direction of the sandwiching means 3. Are arranged in parallel in the direction. A base portion of the fork member 25 is rotatably supported by the fork mounting base 27. The fork member 25 includes a rotation driving means 28a for rotating the fork member 25 via the fork mount 27 and an X direction driving means for reciprocating the fork member 25 in the X direction independently of the clamping means 3. 28b. A guide shaft 29 having an axial direction extending in the X direction is inserted into the fork mounting base 27 on the side of the rotation driving means 28 a and the X direction driving means 28 b, and the fork member 25 is guided by the guide shaft 29 while being guided by the X It is designed to reciprocate in the direction.

  The rotation drive means 28 a and the X direction drive means 28 b connected to the fork member 25 via the fork mounting base 27 and the guide shaft 29 are integrally supported by the connection base 8. Thereby, the support base 15 supports the fork member 25 and the clamping means 3 integrally through the connection base 8.

  Further, as shown in FIG. 4, the loop material supply device 1 moves the clamping means 3 in the same X direction as the width direction orthogonal to the longitudinal direction of the loop material 20 held by the clamping means 3. The moving means 11, the Y direction moving means 12 for moving the clamping means 3 in the same Y direction as the longitudinal direction of the loop member 20 arranged at the sewing position of the sewing machine 2, and the Z direction for moving the clamping means 3 in the vertical direction And moving means 13. Thereby, the control means 17 supplies the loop material 20 to the sewing position in the sewing machine 2 or drives the non-sewn portion of the loop material 20 away from the sewing position by driving the moving means 11, 12, 13. The clamping means 3 is moved.

  The Y-direction moving means 12 has an endless annular Y-direction transport belt 12a. The Y-direction transport belt 12a includes a drive pulley 12b disposed at the same height position with a predetermined gap in the Y direction. It is stretched around the driven pulley 12c. The drive pulley 12b is fixed to the pulley side gear 12d, and the pulley side gear 12d is meshed with a motor side gear 12g fixed to a motor shaft (not shown) of the Y-direction drive motor 12e. The drive pulley 12b rotates in both forward and reverse directions by driving the Y-direction drive motor 12e, so that the Y-direction conveyor belt 12a rotates in both forward and reverse directions along the Y direction. It has become.

  The drive pulley 12b is pivotally supported by a first support base 12h on which a Y-direction drive motor 12e is mounted, and the driven pulley 12c is pivotally supported by a second support base 12i, and the first support base 12h and the second support base 12h are supported. Both the bases 12 i are fixed to the base 16 of the loop material supply device 1.

  Above the Y direction moving means 12, an X direction moving means 11 is provided so as to straddle the Y direction conveying belt 12a. The X-direction moving means 11 has an endless annular X-direction transport belt 11a, and the X-direction transport belt 11a has a driving pulley 11b and a driven pulley 11c arranged at the same height with a predetermined gap therebetween. It is stretched over. The drive pulley 11b is fixed to a pulley-side gear (not shown), and the pulley-side gear is meshed with a motor-side gear fixed to a motor shaft (not shown) of the X-direction drive motor 11d. The drive pulley 11b is rotated in both forward and reverse directions by driving of the X-direction drive motor 11d, whereby the X-direction transport belt 11a is rotated in both forward and reverse directions along the X direction. It has become.

  The drive pulley 11b is pivotally supported by a first support base 11e on which an X-direction drive motor 11d is mounted, and the driven pulley 11c is pivotally supported by a second support base 11f. The second support base 11f extends to the side of the X-direction transport belt 11a and is connected to the first support base 11e. The second support base 11f is provided below the X-direction moving means 11 and has a predetermined gap between each other in the Y direction. Are mounted on a pair of guide rails 11g arranged in parallel with each other.

  Further, a part of the second support base 11f that extends to the side of the X-direction transport belt 11a is fixed to a part of the Y-direction transport belt 12a. The Y-direction conveyance belt 12a of the drive motor 12e can move in the Y direction as a unit while being guided by both guide rails 11g.

  Further, a support base 15 that supports the clamping means 3 and the fork member 25 is fixed to the X-direction transport belt 11a via a connecting member 19, and the support base 15 has an axial direction arranged in the X direction. The guide rods 11h whose parts are respectively supported by the first support base 11e and the second support base 11f are inserted. The support 15 is reciprocated in the X direction while being guided by the guide rod 11h by the rotation of the X-direction transport belt 11a. Thus, the control means 17 drives the X-direction drive motor 11d and rotates the X-direction transport belt 11a, thereby moving the clamping means 3 and the fork member 25 connected to the X-direction transport belt 11a in the X direction. It is like that. Further, the control means 17 drives the Y-direction drive motor 12e and rotates the Y-direction conveyor belt 12a to move the X-direction moving means connected to the Y-direction conveyor belt 12a in the Y-direction. The fork member 25 is moved in the Y direction via the support base 15.

  Then, the control means 17 drives the X-direction moving means 11 so that the clamping means 3 is brought into contact with and separated from the sewing machine 2 so as to supply the loop material 20 from the supply source of the loop material 20 to the sewing position of the sewing machine 2. To move to.

  Further, the control means 17 drives the Y-direction moving means 12 so that the loop material 20 is sewn on the sewn product main body 21 so as to have a predetermined belt loop shape. The clamping means 3 is moved in a direction to supply the sewing portion to the sewing position of the sewing machine 2.

  Furthermore, the Z-direction moving means 13 includes a Z-direction drive cylinder (not shown), and the tip of a cylinder rod (not shown) in the Z-direction drive cylinder has a support base 15 that supports the clamping means 3 and the fork member 25. Are connected to a connecting base 8 which is pivotally supported so as to be movable in the vertical direction. And the control means 17 moves the clamping means 3 to an up-down direction by moving the connection stand 8 to an up-down direction by the expansion-contraction operation | movement of the cylinder rod of the Z direction moving means 13. FIG.

  Further, the control unit 17 includes a storage unit 18 that stores a program of each operation of the loop material supply apparatus 1 and the like.

  Based on the program stored in the storage means 18, the control means 17 drives the moving means 11, 12, 13 to move the clamping means 3 so as to supply the sewing portion of the loop material 20 to the sewing position of the sewing machine 2. It is supposed to be.

  Subsequently, the loop member 20 is sewn in a zigzag type sewing shape so that one end 20a as shown in FIG. 5 is bent in a Z shape and the other end 20b is bent in a U shape by the sewing machine 2. The case of sewing on the object body 21 will be described with reference to FIGS. In the flowchart shown in FIG. 7, steps (ST1) to (ST10) show the operation of the clamping means 3 and the fork member 25, and steps (ST11) to (ST18) show the cloth conveying means 30, the presser 23, and the sewing machine. Shows the sewing operation. Further, the steps arranged next to (ST1) to (ST10) and (ST11) to (ST18) mean that they are performed simultaneously.

  First, the control means 17 drives the X-direction moving means 11 to hold the vicinity of one end 20a in the longitudinal direction of the loop member 20 as shown in FIGS. 6A and 7. 3 is moved so that the one end 20a of the loop member 20 is located at the sewing position of the sewing machine 2 (ST1).

  Subsequently, when the presser 23 of the sewing machine 2 is lowered and the one end 20a of the loop member 20 is pressed by the presser 23 (ST11), the control means 17 moves the Y-direction moving means as shown in FIG. 6 (b). 12 and the Z-direction moving means 13 are driven, and the holding means 3 is separated from the sewing position. During this time, the holding position of the loop material 20 by the holding means 3 is changed from one end portion 20a of the loop material 20 to the vicinity of the other end portion 20b. Move (ST2).

  Subsequently, the control means 17 drives the Z-direction drive cylinder 13a of the Z-direction movement means 13 to move the connecting base 8 downward, so that the clamping means 3 is moved as shown in FIG. The clamping means 3 is moved downward so as to approach the pressing portion pressed by the pressing member 23 in the loop material 20 (ST3). As a result, it is possible to cause looseness between the holding portion by the holding means 3 and the holding portion by the presser 23 in the loop member 20.

  In this manner, sewing with the sewing machine 2 is started in a state where the loop member 20 is loosened between the clamping portion and the pressing portion (first sewing). The sewing machine 2 moves the sewing needle up and down and moves, for example, a staggered position from the reference position at which sewing is started on the mounting table 31 on which the sewing product main body 21 serving as the cloth conveying means 30 for conveying the sewing product main body 21 is placed. The sewing machine main body is moved by moving the loop member 20 such as the heel type or the wire hook type in accordance with an arbitrary sewing shape to be sewn to the sewing machine main body 21 and simultaneously moving the presser 23 in the same manner as the mounting table 31. 21 is conveyed (ST12). And the sewing machine 2 moves so that the mounting base 31 and the presser 23 may be returned to the reference position after the one end 20a of the loop member 20 is sewn to the sewn product main body 21.

  Next, when the sewing of the one end portion 20a of the loop material 20 by the sewing machine 2 is finished (first sewing), the sewing machine 2 raises the presser 23 and then the loop material 20 as shown in FIG. The sewing product main body 21 to which the loop material 20 is sewn is placed so that the vicinity of the one end portion 20a that is the center side in the longitudinal direction of the loop material 20 is located at the sewing position of the sewing machine 2 slightly from the one end portion 20a of the sewing machine 2. It is conveyed by 31 (ST13). At this time, the control means 17 of the loop material supply apparatus 1 drives the Y-direction moving means 11, and the loop material supply apparatus 1 moves the holding means 3 holding the other end 20b to the right (FIG. 6C). (In the direction of arrow B shown in FIG. 6), it is moved beyond the seam (first seam) by the first sewing (FIG. 6C). Thereby, the loop member 20 is folded back in a U shape so as to cover the first seam (ST4).

  Subsequently, when the presser 23 of the sewing machine 2 is lowered and the loop material 20 is pressed by the presser 23 (ST14), the control means 17 lowers the clamping means 3 on the mounting table 31 of the sewing machine 2, and the loop material 20 Is stacked on the sewn product main body 21 (ST5). Further, as shown in FIG. 6E, the control means 17 controls the driving of the Y-direction drive motor 12e of the Y-direction moving means 11 to convey the Y-direction conveyance belt 11a, thereby looping the holding means 3 in a loop. The material 20 moves in the Y direction so as to approach the clamping part and the pressing part (ST6). As a result, it is possible to cause looseness between the holding portion by the holding means 3 and the holding portion by the presser 23 in the loop member 20.

  In this way, the sewing machine 2 moves the sewing needle up and down again and sews the loop material 20 to the sewn product main body 21 in a state in which the looseness is generated between the clamping portion and the pressing portion of the loop material 20. The mounting base 31 is moved in accordance with the sewing shape to be attached, the presser 23 is similarly moved, and the sewing material body 21 is conveyed to sew the loop material 20 to the sewing material body 21 (second sewing) ( ST15). Then, after sewing the loop material 20 on the sewn product main body 21, the sewing machine 2 moves so as to return the mounting table 31 and the presser 23 to the reference position.

  When the second sewing is completed, the sewing machine 2 raises the presser 23 and places the sewn product main body 21 on which the loop material 20 is sewn so that the vicinity of the other end 20b of the loop material 20 is located at the sewing position. It is conveyed by the table 31 (ST16). At this time, the control means 17 of the loop material supply apparatus 1 controls the driving of the Y-direction moving means 11 and the Z-direction moving means 13, and the clamping means 3 is again at one end 20a as shown in FIG. 6 (f). In the upper left direction (the direction of arrow C shown in FIG. 6E). Thereby, the loop member 20 is folded back so as to cover the second seam, and the one end 20a is bent into a Z shape (ST7). At the same time, the holding position of the loop member 20 by the holding means 3 moves to the other end 20 b of the loop member 20.

  Then, as shown in FIG. 6 (f), the control means 17 is driven in the X direction so that the two support portions 25a of the fork member 25 are positioned so as to sandwich the loop member 20 up and down by the drive of the X direction drive means 28b. After the movement, the fork member 25 is rotated by the rotation driving means 28a so that the other end 20b of the loop member 20 is bent in a U shape as shown in FIG. 6G (ST8). At this time, the clamping of the other end 20b of the loop member 20 by the clamping means 3 is released.

  Then, as shown in FIG. 6 (h), the control means 17 drives the X-direction drive means 28b to extract the fork member 25 from the loop material 20 (ST9). Subsequently, the sewing machine 2 moves down the presser 23 and presses the other end 20b of the loop member 20 (ST17), and then moves according to the sewing shape for sewing the mounting table 31 and moves the presser 23. Sewing is performed by sewing the loop material 20 to the sewn product main body 21 while transporting the sewn product main body 21 (third sewing) (ST18). During this sewing operation, the control means 17 moves the clamping means 3 to a position where the loop material 20 is clamped by driving the X-direction moving means 11 and the Y-direction moving means 12 in preparation for the next feeding operation of the loop material 20. (ST10).

  Next, the operation of this embodiment will be described.

  According to the present embodiment, the control means 17 of the loop material supply apparatus 1 is in a state where the loop material 20 is clamped by the clamping means 3 after the loop material 20 and the sewn product main body 21 are pressed by the presser 23. Thus, before the sewing by the sewing machine 2 is performed, the clamping means 3 can be moved in a direction in which the gap between the clamping means 3 by the clamping means 3 and the pressing part by the presser 23 in the loop material 20 is loosened. Thus, when the loop material 20 is sewn to the sewn product main body 21 by the sewing machine 2, when the sewn product main body 21 and the loop material 20 are held by the presser 23 while being transported while being held by the clamping means 3. Since the looseness is generated between the sandwiched portion and the pressing portion of the loop material 20, the twist is generated between the sandwiched portion of the loop material 20 and the portion sewn to the sewn product main body 21. It can be surely prevented. Thereby, it can also prevent that the shift | offset | difference generate | occur | produces in the clamping position of the loop material in a clamping means.

  Therefore, the loop material supply device 1 prevents torsion between the clamping portion by the clamping means 3 and the pressing portion by the presser 23 in the loop material 20, and prevents the deviation of the holding position of the loop material 20 by the clamping means 3. By doing so, the loop material 20 can be sewn into the intended belt loop shape, and the occurrence of so-called dog ears can be reliably prevented. Thus, by supplying the loop material 20 to the sewing machine 2 by the loop material supply device 1, the belt loop can be sewn with a uniform shape and high quality by the sewing machine 2.

  In addition, this invention is not limited to the said embodiment, A various change is possible as needed.

The perspective view which shows one Embodiment of the loop material supply apparatus which concerns on this invention, and the sewing machine which sews the loop material supplied by this loop material supply apparatus to a sewing-body main body. The block diagram which shows the structure of the loop material supply apparatus shown in FIG. The side view which shows the clamping means in the loop material supply apparatus of FIG. The expansion perspective view which shows the loop material supply apparatus of FIG. The perspective view which shows an example of the belt loop sewn by the loop material supplied by the loop material supply apparatus of FIG. (A)-(h) is a schematic side view which shows each supply process of the loop material in the loop material supply apparatus of FIG. The flowchart which shows the process of sewing a loop material on a sewing-body main body with a sewing machine, supplying a loop material with the loop material supply apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loop material supply apparatus 2 Sewing machine 3 Clamping means 7 Frame member 11 X direction moving means 11aX direction conveyance belt 11d X direction drive motor 12 Y direction movement means 12a Y direction conveyance belt 12e Y direction drive motor 13 Z direction movement means 13a Z direction Drive cylinder 17 Control means 18 Storage means 20 Loop material 21 Sewing material body 25 Fork member

Claims (2)

Clamping means for clamping the loop material constituting the belt loop;
Moving means for moving the clamping means to supply each sewing location of the loop material to the sewing product body;
In a loop material supply device for a belt loop sewing machine provided with at least control means for controlling driving of the moving means,
The control means includes the sewing material main body and the loop material after being pressed by the sewing machine, and the sewing machine is configured to convey the loop material while sewing the sewing material main body according to a sewing shape. Before the sewing is performed, the driving of the moving means is controlled so that the clamping means is moved in a direction in which the gap between the clamping part by the clamping means and the pressing part by the presser in the loop material is loosened. Loop material supply device.   The said control means controls the drive of the said movement means so that the said clamping means may be lowered | hung in the direction where the gap between the said clamping part and the said holding | suppressing part in the said loop material loosens. Loop material supply device.