JP2010035982A - Loop material supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a loop material supply device preventing the occurrence of creases in a sewn product body on which a loop material is sewn, and preventing the occurrence of sewing defect when the loop material is sewn on the sewn product body by surely supplying the loop material to an intended position. <P>SOLUTION: Clamping means 3 includes clamping pressure change means 12 for changing the clamping pressure to clamp the loop material 20. Control means 17 controls to set clamping pressure in the clamping pressure change means 12 according to the respective supply steps of supplying the loop material 20 to a belt loop sewing machine 2. When the loop material 20 is moved and sewn, the clamping pressure is set to put the loop clamping position at least in the movable state and in the unmovable state by the control means 17. <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 clamping the loop material, and the loop material is sewn at the sewing position of the sewing machine while holding a predetermined portion of the loop material with a constant clamping pressure by the clamping means. The clamping means is moved so as to be arranged or to retract the non-sewn portion of the loop material from the sewing position.

  The process in the case of sewing the loop material 20 to the sewn product main body 21 so that the one end 20a is bent in a Z shape and the other end 20b is bent in a U shape as shown in FIG. (A) to (h). First, the loop material supply device described above moves the clamping means 3 in a state where the vicinity of one end 20a in the longitudinal direction of the loop material 20 is clamped so that the one end 20a of the loop material 20 is located at the sewing position of the sewing machine ( FIG. 12 (a)). During this movement, it is necessary that the loop clamping position of the clamping means 3 in the loop material 20 does not move so that the supply position of the loop material 20 does not shift.

  When the presser 23 of the sewing machine is lowered and the one end portion 20a of the loop material 20 is pressed, the loop material supply device moves the clamping means 3 in the upper left direction of the one end portion 20a (direction of arrow A in FIG. 12 (b)). To separate from the sewing position. In accordance with this movement, the loop member 20 is slid with respect to the sandwiching means 3, so that the loop sandwiching position of the sandwiching means 3 in the loop member 20 is changed from the vicinity of one end 20a of the loop member to the vicinity of the other end 20b. Moving. (FIG. 12 (b)) In this state, the sewing machine sews one end 20a of the loop member 20 to the sewn product body 21 (first sewing). During the first sewing, the sewn product main body 21 and the presser 23 move in the seam forming direction, but the clamping means 3 cannot move in the same direction. Therefore, the loop member 20 held by the clamping means 3 is sewn. In order to prevent the sewn product main body 21 from wrinkling by pulling the main body 21, the loop material 20 appropriately slides with respect to the clamping means 3, and the loop clamping position of the clamping means 3 in the loop material 20 moves, so that the loop The material 20 needs to move together with the sewn product main body 21.

  After the first sewing, the loop material supply device raises the presser 23 and moves the holding means 3 holding the other end portion 20b in the right direction (the direction of arrow B in FIG. The first seam is moved beyond the first seam (FIG. 12C). Thereby, the loop member 20 is folded back so as to cover the first seam. Even during this movement, the loop material 20 slightly slides with respect to the clamping means 3 to move the loop clamping position, so that the one end 20a sewn along with the movement of the loop material 20 pulls the sewn product main body 21 and sews. It is necessary to prevent the object body 21 from being wrinkled.

  Next, the sewing machine lowers the clamping means 3 and puts the loop material 20 on the sewn product main body 21. Further, the presser 23 is lowered on the upper surface in the vicinity of the one end portion 20a of the loop material 20, and after the loop material 20 is pressed, the second sewing is performed, thereby the vicinity of the first seam (the first seam in FIG. 12D). A second seam is formed on the right side of the first seam (FIG. 12D). Then, after raising the presser 23 again, the clamping means 3 moves again in the upper left direction of the one end portion 20a (the direction of arrow C in FIG. 12 (e)) (FIG. 12 (e)). Thereby, the loop member 20 is folded back so as to cover the second seam, and the one end portion 20a is bent in a Z shape. Even during this movement, the loop material 20 slightly slides with respect to the clamping means 3 to move the loop clamping position, so that the one end 20a sewn along with the movement of the loop material 20 pulls the sewn product main body 21 and sews. It is necessary to prevent the object body 21 from being wrinkled.

  Subsequently, the sewing machine sandwiches the vicinity of the other end portion 20b of the right loop member 20 sandwiched by the sandwiching means 3 by the pair of support portions 25a provided in the fork member 25 (FIG. 12 (f)). The fork member 25 is rotated so that the other end is bent in a U shape (FIG. 12G). When the clamping means 3 clamps the loop material 20 when the fork member 25 rotates, the loop material 20 may be loosened or the loop material 20 may come off the clamping means 3. Immediately before the end of the rotation of the fork member 25, the loop member 20 slides with respect to the clamping means 3 and is released from the clamping means 3 (FIG. 12 (g)). At this time, if the clamping pressure of the clamping means 3 on the loop material 20 is too strong, the loop material may not be released.

  The sewing machine extracts the fork member 25 from the vicinity of the other end portion 20b of the loop member 20, and presses the vicinity of the other end portion 20b of the loop member 20 with the presser 23 so that the loop member 20 is sewn. 21 is sewn (third sewing) (FIG. 12 (h)).

JP 2007-117770 A

  As described above, in each supply process of supplying the loop material 20 to the sewing machine, the loop clamping position of the clamping means 2 in the loop material 20 needs to move when the loop material 20 is moved and sewn in each supply process. Sometimes it is necessary not to move. Further, when the fork member 25 rotates while holding the loop member 20, it is necessary for the holding means 3 to maintain the holding of the loop member 20 at the initial stage of the rotation, but immediately before the end of the rotation of the fork member 25. The loop material 20 needs to be released from the clamping means 3.

  Here, whether or not the loop clamping position of the clamping means 3 in the loop material 20 moves and whether the clamping means 3 keeps or releases the loop material 20 clamps the loop material 20. Although it is determined by the clamping pressure, which is a pressure, in the conventional loop material supply device, the clamping pressure of the clamping means 3 is constant, and thus the optimum clamping pressure in each of the above-described supply processes cannot be provided.

  For this reason, if the clamping pressure with respect to the loop material 20 of the clamping means 3 is weak during the sewing operation of the sewing machine for sewing the loop material 20 to the sewing product main body 21, the clamping of the loop material 20 by the clamping means 3 is released. Had the problem of fear.

  On the other hand, when the clamping pressure on the loop material 20 by the clamping means 3 is strong, the sewn product main body 21 to which the loop material 20 is sewn is pulled when moving the loop clamping position in a state where the loop material 20 is clamped by the clamping means 3. , Had the problem of wrinkling.

  Further, when the fork member 25 rotates in order to bend the other end 20b of the loop member 20 into a U shape, immediately after the fork member 25 starts rotating, the clamping pressure by the clamping means 3 is not strong. In some cases, the holding of the loop member 20 by the holding means 3 is released, and the other end portion 20b of the loop member 20 cannot be bent into a U shape. On the other hand, if the clamping pressure by the clamping means 3 is not weak immediately before the end of the rotation of the fork member 25, the loop member 20 does not come off from the clamping means 3, and the fork member 25 cannot be rotated reliably, or The loop material 20 entangled with the fork member 25 has a problem that the sewn product main body 21 is pulled.

  Further, when the thickness of the loop member 20 and the strength of the material are different, the optimum holding pressure is also different, and there is a problem that the loop member 20 cannot be reliably supplied with the set holding pressure.

  As a result, there is a problem that wrinkles may occur in the sewn product main body 21 to which the loop material 20 is sewn, or the loop material 20 cannot be sewn at the intended position, resulting in poor sewing. Was.

  The present invention has been made in view of these points, and can prevent wrinkles from occurring in the sewn product body to which the loop material is sewn, and by reliably supplying the loop material to the intended position, It is an object of the present invention to provide a loop material supply device capable of preventing the occurrence of poor sewing when a loop material is sewn to a sewn product body.

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 a loop material supply device for a belt loop sewing machine comprising: moving means for moving the holding means to move the belt; and control means for controlling at least the holding means and the moving means. A clamping pressure changing means for changing a clamping pressure for clamping the loop material is provided, and the control means further applies the clamping pressure to the clamping pressure changing means in accordance with each supply step of supplying the loop material to the belt loop sewing machine. The point is to perform control to set the.
Since the control for setting the clamping pressure in the clamping pressure changing means is performed according to each supply process of supply, it is possible to provide an optimal clamping pressure in each of the supply processes. Thereby, the loop material supply device can prevent the holding of the loop material by the holding means during the sewing operation of the sewing machine, and in particular, when using a loop material made of a strong material. It is possible to prevent the loop material from coming loose from being pinched by the pinching means and being loosened. At the same time, when moving the loop clamping position by the clamping means while holding the loop material by the clamping means, the loop material can smoothly slide with respect to the clamping means, so that the loop material pulls the sewn product main body. Can be prevented.

  The loop material supply device according to claim 2 is characterized in that, in the loop material supply device according to claim 1, when the loop material is moved and sewn, the clamping in the loop material is performed. The loop clamping position held by the means is that the clamping pressure by the control means can be set to at least a movable state and a non-movable state.

  According to the second aspect of the present invention, the loop material supply device can reliably prevent the loop material from being pinched by the pinching means during the sewing operation of the sewing machine, and is particularly strong. In the case of using a loop material made of a material, it is possible to prevent the loop material from coming loose from being pinched by the pinching means and being loosened. At the same time, when moving the loop clamping position by the clamping means while holding the loop material by the clamping means, the loop material can smoothly slide with respect to the clamping means. Wrinkles can be reliably prevented.

  A feature of the loop material supply device according to the invention described in claim 3 is that, in the loop material supply device according to claim 1 or 2, when the loop material is moved and sewn, the loop material supply device In a state where the loop clamping position of the material is movable, the control means can further set the clamping pressure so that the movement speed and the movement amount of the loop material relative to the clamping means can be adjusted. .

  According to the third aspect of the present invention, the loop material supply device can more reliably prevent the loop material from being held by the holding means during the sewing operation of the sewing machine. When a loop material made of a strong material is used, it is possible to prevent the loop material from coming loose from being pinched by the pinching means. At the same time, when moving the loop clamping position by the clamping means while holding the loop material by the clamping means, the loop material can smoothly slide with respect to the clamping means. Wrinkles can be more reliably prevented.

  Further, the loop material supply device according to the invention described in claim 4 is characterized in that the pair of fork members provided in the loop material supply device according to any one of claims 1 to 3 is provided. In the step of bending the end portion of the loop material and removing the end portion from the clamping means by sandwiching the end portion of the loop material by a support portion and rotating the fork member, the control means includes: The clamping pressure of the clamping means immediately before the end of the rotation of the fork member is controlled so as to be weaker than the clamping pressure of the clamping means when the both support portions clamp the loop material.

  According to the fourth aspect of the present invention, by reducing the clamping pressure immediately before the end of the rotation of the fork member as compared with the clamping pressure of the clamping means when both support parts clamp the loop material, the loop material Can be easily removed from the clamping means. Also, by making the holding pressure when both support parts hold the loop material stronger than the holding pressure just before the end of the rotation of the fork member, it is possible to prevent the loop material from loosening or coming off from the holding means. Can do. As a result, the loop material supply device can reliably supply the loop material to the intended position, so that the sewing machine prevents the occurrence of poor sewing when the loop material is sewn to the body of the sewing product, resulting in high quality. Loop material can be sewn to the sewing body.

  Furthermore, the characteristics of the loop material supply device according to the invention described in claim 5 are set according to each of the supply processes in the loop material supply device according to each invention of claim 1 or claim 4. It is in the point provided with the memory | storage means in which the said clamping pressure value was memorize | stored.

  According to the invention described in claim 5, according to each supply process, the loop material is clamped by the clamping means with the clamping pressure stored in the storage means, so that the loop material by the clamping means optimum for each supply process is obtained. Can be provided.

  The loop material supply device according to claim 6 is characterized in that, in the loop material supply device according to claim 5, the value of the clamping pressure stored in the storage means can be input. The operation means is provided.

  According to the sixth aspect of the present invention, the clamping pressure stored in the storage means can be changed to an arbitrary pressure value by operating the operating means. As a result, the operator can change the clamping pressure value in consideration of various conditions such as the material of the loop material, for example, so that the loop clamping position in the loop material can be moved more smoothly to pull the sewn product main body. It is possible to reliably prevent the slipping and to prevent the loop material from slacking, and to supply the loop material to the intended position more reliably.

  Further, the loop material supply device according to the invention described in claim 7 is characterized in that in the loop material supply device according to claim 5 or 6, the thickness of the loop material clamped by the clamping means. Detecting means for detecting a length dimension, and the control means calculates the value of the clamping pressure stored in the storage means in consideration of the thickness dimension of the loop material detected by the detecting means. In this point, the clamping pressure value is corrected.

  According to the seventh aspect of the present invention, the detecting means detects the thickness dimension of the loop material that is clamped by the clamping means, and takes into account the detected thickness dimension of the clamping pressure stored in the storage means. It is possible to correct the optimum clamping pressure calculated in the above. As a result, when the loop material is moved by the clamping means while the loop material is being clamped by the clamping means, the loop material can smoothly slide with respect to the clamping means, so that the sewn body to which the loop material is sewn is pulled. It is possible to reliably prevent the loop material from being loosened, and to prevent the loop material from slackening, so that the loop material can be more reliably supplied to the intended position.

  Furthermore, the loop material supply device according to the invention described in claim 8 is characterized in that in the loop material supply device according to claims 1 to 7, the clamping pressure changing means is an electropneumatic regulator. There is a point.

  According to the eighth aspect of the invention, by using the electropneumatic regulator as the clamping pressure changing means, the clamping pressure on the loop material by the clamping means can be reliably changed according to each supply process.

  The loop material supply device according to the invention described in claim 9 is characterized in that, in the loop material supply device according to claims 1 to 7, the clamping pressure changing means has a set pressure fixed. Further, it is a pneumatic circuit in which a plurality of pressure reducing valves are incorporated.

  According to the ninth aspect of the present invention, by using the pneumatic circuit as the clamping pressure changing means, the clamping pressure on the loop material by the clamping means can be reliably changed according to each supply process.

  As described above, according to the loop material supply device of the present invention, the loop material smoothly slides with respect to the clamping means when the loop material is moved by the clamping means while the loop material is being clamped by the clamping means. Therefore, it is possible to prevent the loop material from pulling and wrinkling the sewn product main body. Further, since the loop material supply device can prevent the loop material from slackening, the loop material can be reliably supplied to the intended position. As a result, in the sewing machine that is supplied with the loop material by the loop material supply device, it is possible to prevent the occurrence of poor sewing when the loop material is sewn to the sewn product body, and the high-quality loop material is sewn to the sewn product body. Can be attached.

  Hereinafter, an embodiment of a loop material supply device according to the present invention will be described with reference to FIGS. Here, the same components as those of the conventional loop material supply device will be described using the same reference numerals.

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

  As shown in FIGS. 1 and 2, the loop material supply device 1 according to the present embodiment has a clamping means 3 for clamping the loop material 20 in order to supply the loop material 20 constituting the belt loop to the sewing machine 2. ing.

  The clamping means 3 includes a first clamping member 5 that abuts on the upper surface of the loop material 20 and a second clamping member 6 that abuts on the lower surface of the loop material 20, and the loop is formed by the first clamping member 5 and the second clamping member 6. The material 20 is clamped. The first clamping member 5 includes a support portion 5a formed in a flat plate shape, a pressing portion 5b formed to project downward in the direction of the second sandwiching member 6 at the distal end portion of the support portion 5a, and the support portion 5a. It has a mounting portion 5c erected on the other end portion, and the side surface is formed in an L shape. An auxiliary member 5d is attached to the upper surface of the support portion 5a by a fixing screw 5e, and the distal end portion of the auxiliary member 5d is located on the distal end side of the pressing portion 5b and protrudes in the direction of the second clamping member 6. Thus, the loop member 20 is pressed together with the pressing portion 5b. And the auxiliary member 5d is attached so that a front-end | tip part can extend in the direction which protrudes from the front end side of the press part 5b.

  The 2nd clamping member 6 is comprised by flat form, and is arrange | positioned so that the press part 5b in the 1st clamping member 5 and the lower surface of the front-end | tip part of the auxiliary member 5d may be opposed, and the one end part 6a of the 2nd clamping member 6 Is fixed to a flat frame member 7 disposed below the first clamping member 5.

  An air cylinder 9 is attached to the clamping means 3 as a driving means for driving the first clamping means 5 and the second clamping means 6 in a direction in which the first clamping means 5 and the second clamping means 6 are brought into contact with and away from each other. The tip of the cylinder rod 9 b of the air cylinder 9 is attached to the upper surface of the frame member 7.

  As shown in FIG. 3, the air cylinder 9 is connected to a pneumatic circuit 11 for supplying pressure to the air cylinder 9. The pneumatic circuit 11 includes an electropneumatic regulator 12 that can adjust the pressure supplied to the air cylinder 9 by an electrical signal, a three-way valve 13 that selects the moving direction of the cylinder rod 9b, and a source pressure from an air supply source. A three-way valve 13 and a pressure reducing valve 15 for supplying the pressure to the electropneumatic regulator 12 are provided.

  In the air cylinder 9, the first clamping member 5 moves in the direction of the second clamping member 6 and clamps the loop member 20, as shown in FIG. 2, with the cylinder rod 9 b pulled into the cylinder body 9 a. It is like that. At this time, the control means 17 that controls the driving of each part of the loop material supply device 1 such as the pressure reducing valve 15, the electropneumatic regulator 12, the three-way valve 13, and each moving mechanism controls the electropneumatic regulator 12 to control the air. The air supply pressure to the cylinder 9 can be adjusted, and the clamping pressure for the loop member 20 by the clamping means 3 can be set.

  Furthermore, when the loop member 20 is moved and sewn, the control means 17 is in a state where the loop holding position is movable, and further adjusts the moving speed and the moving amount of the loop member 20 with respect to the holding means 3. The clamping pressure can be set in

  Further, the loop material supply device 1 supplies a sewing part of the loop material 20 to the sewing position of the sewing machine 2 or a moving mechanism that moves the clamping means 3 so as to retract a non-sewn part of the loop material 20 from the sewing position. 16. As shown in FIG. 5, the loop material supply device 1 has a direction along the seam formed when the loop member 20 is sewn to the sewn product main body 21 as the moving mechanism 16 (D in FIG. 6). A lateral movement mechanism 16b (16) that moves in the direction of vertical movement, a vertical movement mechanism 16a (16) that moves the clamping means 3 in a direction perpendicular to the seam (E in FIG. 6), and the clamping means 3 with respect to the sewing product body. And a vertical movement mechanism 16c (16) that moves in the vertical direction.

  Further, the control means 17 of the loop material supply apparatus 1 includes a storage means 18 for storing 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 each moving mechanism 16 so as to move the clamping means 3 so as to supply the sewing location in the loop material 20 to the sewing position of the sewing machine 2. It has become. Further, when the sewing operation by the sewing machine 2 is started, the control means 17 moves the loop holding position by the holding means 3 while holding the loop material 20 by the holding means 3, or both ends 20a, 20b of the loop material 20. The holding mechanism 3 is moved by driving the moving mechanism 16 so as to supply each sewing location of the loop material 20 so that the sewing material is bent into a desired shape.

  Then, the control means 17 supplies each sewing location of the loop material 20 clamped by the clamping means 3 to the sewing position in the sewing machine 2 so that the loop material 20 is sewn to the sewn product main body 21 in a predetermined shape. The air supply pressure to the air cylinder 9 is adjusted by controlling the electropneumatic regulator 12 as the clamping pressure changing means for changing the clamping pressure of the clamping means 3, and the clamping pressure by the both clamping members 5 and 6 is controlled. It is like that. In the present embodiment, when the loop member 20 is moved and sewn, the holding pressure by the control means 17 is set so that the loop holding position in the loop member 20 is at least movable and unmovable. It is possible. Further, in this embodiment, the control means 17 moves the clamping means 3 when moving the clamping means 3 so that the clamping pressure on the loop material 20 by the clamping means 3 moves so that the loop clamping position by the clamping means 3 moves. Control is performed so that the clamping pressure from the start to immediately before the movement stop becomes weaker than the clamping pressure during the movement stop of the clamping means 3 from immediately before the clamping means 3 stops moving.

  Subsequently, the loop material 20 is sewn to the sewing machine 2 in such a shape that the one end portion 20a is bent in a Z shape and the other end portion 20b is bent in a U shape as described in the background art by the loop material supply device 1. A description will be given using a case where the loop material 20 is sewn to the sewing product body 21 by the sewing machine 2 (see FIGS. 11 and 12A to 12H).

  First, the loop material supply device 1 drives each moving mechanism 16 in the control means 17, so that the holding means 3 in the state of holding the vicinity of the one end portion 20 a in the longitudinal direction of the loop material 20 is changed to one end of the loop material 20. The part 20a moves so as to be located at the sewing position of the sewing machine. At this time, as shown in FIG. 7, the control means 17 adjusts the air supply pressure to the air cylinder 9 by controlling the electropneumatic regulator 12, and the clamping means for the loop material 20 by the clamping means 3 is held by the clamping means. 3 is controlled to a predetermined pressure value at which the loop clamping position cannot be moved (in the present embodiment, this predetermined pressure value is referred to as a reference pressure value).

  When the sewing machine presser 23 is lowered and the one end 20a of the loop member 20 is pressed, the control means 17 controls the electropneumatic regulator 12 to adjust the air supply pressure to the air cylinder 9, and the clamping pressure is reduced. Control is performed so that the loop clamping position by the clamping means 3 becomes a movable pressure value that is weaker than the reference pressure value (in this embodiment, this pressure value is referred to as a weak pressure value). In a state where the clamping pressure by the clamping means 3 is a low pressure value, the control means 17 moves the clamping means 3 in the upper left direction of the one end portion 20a (the direction of arrow A in FIG. 8B). In accordance with this movement, the loop member 20 is slid with respect to the holding unit 3, so that the loop holding position of the holding unit 3 in the loop member 20 is changed from the vicinity of one end 20 a of the loop member 20 to the vicinity of the other end 20 b. Move to.

  Subsequently, the control means 17 immediately before the movement of the clamping means 3 stops, the clamping pressure is higher than the weak pressure value and weaker than the reference pressure value (in this embodiment, this pressure value is set to the medium pressure value). Control). In this state, the sewing machine 2 sews one end 20a of the loop member 20 to the sewn product main body 21 (first sewing). The control means 17 maintains the clamping pressure by the clamping means 3 at the intermediate pressure value during the first sewing. During the first sewing, the sewn product main body 21 and the presser 23 move in the seam forming direction, but the loop member 20 held by the holding means 3 that cannot move in the same direction has a holding pressure of medium pressure value. In a state, it slips moderately with respect to the clamping means 3, and the loop clamping position changes.

  After the first sewing, the loop material supply device 1 raises the presser 23, and the vicinity of the end portion 20 a that is the center side in the length direction of the loop material 20 is slightly longer than the one end portion 20 a of the loop material 20. The sewn product main body 21 to which the loop material 20 is sewn is conveyed so as to be located at the sewing position. At this time, the control means 17 of the loop material supply device 1 controls the clamping pressure to be a weak pressure value, and the clamping means 3 that clamps the other end 20b is connected to the first sewing stitch (the first stitch). ). Thereby, the loop member 20 is folded back so as to cover the first seam. During the movement of the clamping means 3, the loop material 20 slightly slides with respect to the clamping means 3, so that the loop clamping position moves toward the end portion side of the one end portion 20 a.

  Furthermore, the control means 17 controls the clamping pressure of the clamping means 3 to be an intermediate pressure value immediately before the movement of the clamping means 3 is stopped, and then lowers the clamping means 3 so that the loop material 20 is sewn. Overlay the main body 21. Further, the presser 23 is lowered on the upper surface in the vicinity of the one end portion 20a of the loop member 20 to press the loop member 20, and the second sewing is performed to form the second seam in the vicinity of the first seam. During the sewing operation in which the sewing machine 2 presses the vicinity of the one end portion 20a of the loop member 20 with the presser 23 and sews it on the sewn product main body 21, the control means 17 maintains the clamping pressure by the clamping means 3 at a medium pressure value. . During the second sewing, similarly to the first sewing, the loop clamping position where the clamping means 3 clamps the loop material 20 changes.

  Subsequently, after the second sewing, the sewing machine 2 raises the presser 23 again, and then the sewing product main body to 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. 21 is conveyed. Further, the control means 17 of the loop material supply device 1 controls the clamping pressure so as to be a weak pressure value, and then moves the clamping means 3 to fold the loop material 20 so as to cover the second seam. The part 20a is bent in a Z shape. Also during this movement, the loop material 20 slightly slides with respect to the holding means 3 to move the loop holding position.

  Then, the control means 17 controls the clamping pressure of the clamping means 3 to be an intermediate pressure value immediately before the movement of the clamping means 3 stops, and then stops the movement of the clamping means 3. Furthermore, the control means 17 moves the fork member 25 including a pair of support portions 25 a arranged in parallel in the axial direction in the width direction of the loop material 20, and both support portions 25 a are positioned on both planes of the loop material 20. Thus, immediately before the loop member 20 is sandwiched, control is performed so that the sandwiching pressure becomes the reference pressure value.

  Thereafter, the control means 17 rotates the fork member 25 so that the other end portion of the loop member 20 is bent in a U shape while the clamping pressure of the clamping means 3 is at the reference pressure value. Immediately before the end of the rotation, the clamping pressure of the clamping means 3 is controlled to become a weak pressure value. At this time, the loop member 20 slides with respect to the clamping means 3 and is released from the clamping means 3.

  The sewing machine 2 pulls out the fork member 25 from the vicinity of the other end portion 20b of the loop member 20, and presses the vicinity of the other end portion 20b of the loop member 20 with the presser 23 to sew the loop member 20 to the sewing product. The main body 21 is sewn (third sewing). During the third sewing operation, the control means 17 moves the clamping means 3 to a position where the loop material 20 is clamped by driving each moving mechanism 16 in order to prepare for the next feeding operation of the loop material 20.

  The reference pressure value, the weak pressure value, and the intermediate pressure value are set to optimum pressure values corresponding to each supply process of the loop material 20 obtained in advance by experiments or the like, and are stored in the storage unit 18. Then, as described above, the control means 17 adjusts the air supply pressure to the air cylinder 9 by controlling the electropneumatic regulator 12 by the clamping pressure stored in the storage means 18 according to each supply process. Thus, the loop member 20 can be clamped by the clamping means 3.

  Further, the loop material supply apparatus 1 has an operation means 27 for inputting an operation instruction of each part of the loop material supply apparatus 1 to the control means 17, and this operation means 27 is a display means for displaying information related to the operation. 28 and input means 29 are provided. The operation means 27 can input an instruction to change the clamping pressure stored in the storage means 18 to the control means 17 by the operation of the operator.

  Further, the loop material supply device 1 is provided with a detecting means 30 for detecting the thickness dimension of the loop material 20 held by the holding means 3, and the control means 17 receives the loop input from the detecting means 30. In consideration of the thickness dimension of the material 20, the clamping pressure stored in the storage means 18 can be corrected.

  Next, the operation of this embodiment will be described.

  According to the present embodiment, the electropneumatic regulator 12 (clamping pressure) according to a command from the control unit 17 in accordance with each supply process of supplying each sewing location of the loop material 20 clamped by the clamping unit 3 to the sewing position in the sewing machine 2. By setting the clamping pressure in the changing means), the clamping pressure by the both clamping members 5 and 6 can be controlled, so that the optimum clamping pressure can be provided in each of the supply steps. Thereby, the loop material supply device 1 can prevent the holding of the loop material 20 by the holding means 3 during the sewing operation of the sewing machine 2, and can prevent the loop material 20 from being loosened. When using 20, it can prevent that the loop material 20 remove | deviates from being clamped by the clamping means 3, and loosens. At the same time, when the loop member 20 is moved by the holding means 3 while moving the loop holding position of the holding member 3, the loop member 20 slides with respect to the holding member 3, so that the loop member 20 pulls the sewing product main body 21. , It can be prevented from wrinkling.

  Therefore, the loop material 20 can be reliably supplied to the intended position by preventing the loop material 20 from loosening during the sewing of the loop material 20. As a result, in the sewing machine 2 to which the loop material 20 is supplied by the loop material supply device 1, the occurrence of poor sewing when the loop material 20 is sewn to the sewn product main body 21 can be prevented, and the high-quality loop material 20 can be prevented. Can be sewn to the sewn product main body 21.

  Further, in the loop material supply device 1, the holding pressure by the control means 17 can be set so that the loop holding position by the holding means 3 is at least movable and non-movable. It is possible to more smoothly move the loop clamping position due to the above, and it is possible to reliably prevent the loop material 20 from being loosened while the loop material 20 is sewn.

  Furthermore, the loop material supply device 1 is in a state where the loop clamping position can be moved when the loop material 20 is moved and sewn by the control means 17, and the moving speed of the loop material 20 relative to the clamping means 3 is By setting the clamping pressure so as to adjust the movement amount, it is possible to provide the optimum clamping pressure in each supply process for supplying the loop material 20. The loop clamping position by the clamping means 3 can be moved more smoothly, and the loop material 20 can be securely clamped during the sewing of the loop material 20 to prevent the loop material 20 from loosening more reliably.

  Furthermore, the loop material 20 is easily removed from the clamping means 3 by making the clamping pressure immediately before the end of the rotation of the fork member 25 weaker than the clamping pressure when the both support portions 25a clamp the loop material 20. Can do. Further, by making the holding pressure when both the support portions 25a hold the loop material 20 stronger than the holding pressure immediately before the end of the rotation of the fork member 25, the loop material loosens during the sewing of the loop material 20, It is possible to prevent the pinch means 3 from coming off. As a result, the loop material supply device 1 can reliably supply the loop material 20 to the intended position. Therefore, the sewing machine 1 can generate a sewing failure when the loop material 20 is sewn to the sewn product main body 21. Therefore, the high-quality loop material 20 can be sewn to the sewn product main body 21.

  Further, since the optimum clamping pressure corresponding to each supply process of the loop material 20 by the loop material supply apparatus 1 is stored in the storage unit 18, the loop material supply apparatus 1 stores the optimum holding pressure according to each supply process. By holding the loop member 20 by the holding means 3 with the holding pressure stored in the means 18, the optimum holding condition of the loop member by the holding means can be provided for each process.

  Furthermore, in the loop material supply apparatus 1, the clamping pressure stored in the storage unit 18 can be changed to an arbitrary pressure value by operating the operation unit 27. As a result, the operator can change the clamping pressure in consideration of various conditions such as the material of the loop material 20, for example, so that the loop clamping position by the clamping means 3 can be moved more smoothly and the sewing product body 21. It is possible to reliably prevent the wrinkle from occurring and to prevent the loop material 20 from being bent during the sewing of the loop material 20 and to supply the loop material 20 to the intended position more reliably.

  Further, the loop material supply device 1 detects the thickness dimension of the loop material 20 sandwiched by the sandwiching means 3 by the detecting means 30 and considers the thickness dimension in which the sandwiching pressure stored in the storage means 18 is detected. Thus, the optimum clamping pressure calculated in this way is corrected. Thereby, the loop material supply device 1 can move the loop clamping position by the clamping means 3 more smoothly and reliably prevent the sewn product main body 21 from being pulled, and the loop material 20 can be looped while the loop material 20 is being sewn. It is possible to prevent the material 20 from being bent and supply the loop material 20 to the intended position more reliably.

  Next, a second embodiment according to the present invention will be described with reference to FIGS. Here, the second embodiment will be described using the same reference numerals, omitting the detailed description of the same configuration as the first embodiment described above.

  FIG. 8 is a perspective view showing the clamping means 3 in the loop material supply apparatus 1 according to the second embodiment. As shown in FIG. 8, the clamping means 3 is a first clamping that abuts on the upper surface of the loop material 20. The loop member 20 is sandwiched between the member 31 and the second sandwiching member 32 that contacts the lower surface of the loop member 20. The first clamping member 31 has a support part 31a formed in a flat plate shape, and a first pressing part 31b formed to protrude in the direction of the second clamping member 32 at the tip of the support part 31a. The second clamping member 32 includes a second pressing portion 32a disposed to face the first pressing portion 31b, and a frame portion formed to extend from one end portion of the second pressing portion 32a to the support portion 31a. The side surface shape provided with 32b and the attaching part 32c standingly arranged by the flame | frame part 32b is formed in T shape.

  Two support shafts 33 are attached to the frame portion 32b of the second clamping member 32 so as to face the support portion 31a of the first clamping member 31 so as to protrude in the direction of the support portion 31a. A through hole through which both support shafts 33 are inserted is formed at a position facing both support shafts 33 in the support portion 31 a of 31. The first clamping member 31 is movable along the both support shafts 33 in a direction in which the first clamping member 31 contacts and separates from the second clamping member 32.

  A first spring 36 is interposed between the support portion 31 a of the first clamping member 31 and the frame portion 32 b of the second clamping member 32, and the first spring 36 is the first clamping member 31. The first pressing portion 31b biases the first clamping member 31 in a direction away from the second pressing portion 32a of the second clamping member 32.

  A stepping motor 37 is attached to the attachment portion 32c as a driving means for driving the first clamping member 31 in a direction in which the first clamping member 31 is in contact with and away from the second clamping member 32. A cam 39 disposed on the motor shaft 37 a of the stepping motor 37 via the second spring 38 is attached above the first clamping member 31.

  When the second spring 38 is in a free length state in which the second spring 38 is not pressed by the cam 39, the clamping means 3 positions the first pressing portion 31b in a direction away from the second pressing portion 32a by the bias of the first spring 36. It has become. Then, the clamping means 3 is driven by the rotation of the stepping motor 37, the cam 39 is rotated, and is urged by the second spring 38 compressed by the cam 39. As shown in FIG. The spring 36 moves in the direction of the second holding member 32 along the both support shafts 33 against the bias of the spring 36. Even when the first pressing portion 31b is in contact with the second pressing portion 32a, the amount by which the cam 39 compresses the second spring 38 changes depending on the rotational phase of the stepping motor 37, and the first pressing portion 31b becomes the second pressing portion. Since the force for biasing 32a changes, the clamping pressure of the clamping means 3 on the loop member 20 can be changed by controlling the rotational phase of the stepping motor 37.

  Further, the control means 17 adjusts the air supply pressure to the air cylinder 9 by controlling the electropneumatic regulator 12 that changes the clamping pressure of the clamping means 3 in each supply process, and the both clamping members 5 and 6 are used. The clamping pressure is controlled. In the present embodiment, the control means 17 starts the movement of the clamping means 3 when moving the clamping means 3 so that the clamping pressure on the loop material 20 by the clamping means 3 moves so that the loop clamping position by the clamping means 3 moves. Control is performed so that the clamping pressure immediately before the stop of movement becomes weaker than the clamping pressure during the stop of movement of the clamping means 3 immediately before the clamping means 3 stops moving.

  Next, the operation of this embodiment will be described.

  Also in the second embodiment, the stepping motor 37 is rotationally driven by a command from the control means 17 in accordance with each supply process of supplying each sewing location of the loop material 20 held by the holding means 3 to the sewing position in the sewing machine 2. By setting the clamping pressure on the second spring 38, the clamping pressure by the both clamping members 5 and 6 can be controlled, so that the optimum clamping pressure can be provided in each of the supply steps. Thereby, the loop material supply device 1 can prevent the holding of the loop material 20 by the holding means 3 during the sewing operation of the sewing machine 2, and can prevent the loop material 20 from being loosened. When 20 is used, it is possible to prevent the loop member 20 from being loosened by being held by the holding means 3 during the sewing of the loop member 20. At the same time, when the loop member 20 is moved by the holding means 3 while moving the loop holding position of the holding member 3, the loop member 20 slides with respect to the holding member 3, so that the loop member 20 pulls the sewing product main body 21. Wrinkles can be prevented.

  Therefore, the loop material 20 can be reliably supplied to the intended position by preventing the loop material 20 from loosening during the sewing of the loop material 20. As a result, in the sewing machine 2 to which the loop material 20 is supplied by the loop material supply device 1, the occurrence of poor sewing when the loop material 20 is sewn to the sewn product main body 21 can be prevented, and the high-quality loop material 20 can be prevented. Can be sewn to the sewn product main body 21.

  Next, a third embodiment according to the present invention will be described with reference to FIG. Here, configurations similar to those in the first and second embodiments will be described using the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIG. 10, the loop material supply device 1 according to the third embodiment is connected to an air pressure circuit 11 for supplying air to the air cylinder 9, and the air pressure circuit 11 is an electric signal. A plurality of pressure-reducing valves 41 capable of adjusting the air supply pressure supplied to the air cylinder 9. Each pressure reducing valve 41 needs the same number as the required number of air supply pressures. In the present embodiment, the number of air supply pressures that are set to the reference pressure value, the intermediate pressure value, and the low pressure value is required. Therefore, the three pressure reducing valves 41 are provided, the set pressure value of the first pressure reducing valve 41a (41) is the reference pressure value, the set pressure value of the second pressure reducing valve 41b (41) is the medium pressure value, and the third pressure reducing valve The set pressure value of 41c (41) is set to be fixed to a weak pressure value.

  The pneumatic circuit 11 has a first electromagnetic valve 42a (42) for selecting the moving direction of the cylinder rod 9b, and further, the air cylinder 9 is operated by the first pressure reducing valve 41a via the first electromagnetic valve 42a. A medium pressure value or a low pressure value air is supplied to the air cylinder 9 by the second pressure reducing valve 41b or the third pressure reducing valve 41c through the second electromagnetic valve 42b for supplying air at a reference pressure value to the first pressure reducing valve 41a. It has the 3rd solenoid valve 42c to supply.

  The control means 17 controls the switching of each pressure reducing valve 41 with respect to the second electromagnetic valve 42b or the third electromagnetic valve 42c, thereby adjusting the air supply pressure to the air cylinder 9 and clamping the loop material 20 by the clamping means 3. The pressure is set. That is, the control means 17 switches the second electromagnetic valve 42b to the high pressure first pressure reducing valve 41a and controls the first electromagnetic valve 42a, thereby pulling the cylinder rod 9b into the cylinder body 9a and holding the holding means 3 Thus, the loop member 20 is clamped by the reference pressure value. The control means 17 further switches the second electromagnetic valve 42b or the third electromagnetic valve 42c to the medium pressure second pressure reducing valve 41b or the low pressure third pressure reducing valve 41c after the loop member 20 is clamped. By controlling the electromagnetic valve 42a, the clamping pressure of the clamping means 3 is adjusted to an intermediate pressure value or a weak pressure value.

  Also according to the third embodiment, each of the sewing parts of the loop material 20 clamped by the clamping means 3 is clamped by each pressure reducing valve 41 according to a command from the control means 17 in accordance with each supply process of supplying the sewing position to the sewing position in the sewing machine 2 By switching the pressure, the clamping pressure by the both clamping members 5 and 6 can be controlled, so that the optimum clamping pressure can be provided in each of the supply steps. Thereby, the loop material supply device 1 can prevent the holding of the loop material 20 by the holding means 3 during the sewing operation of the sewing machine 2, and can prevent the loop material 20 from being loosened. When 20 is used, it is possible to prevent the loop member 20 from being loosened by being held by the holding means 3 during the sewing of the loop member 20. At the same time, when the loop member 20 is moved by the holding means 3 while moving the loop holding position of the holding member 3, the loop member 20 slides with respect to the holding member 3, so that the loop member 20 pulls the sewing product main body 21. , It can be prevented from wrinkling.

  Therefore, the loop material 20 can be reliably supplied to the intended position by preventing the loop material 20 from loosening during the sewing of the loop material 20. As a result, in the sewing machine 2 to which the loop material 20 is supplied by the loop material supply device 1, the occurrence of poor sewing when the loop material 20 is sewn to the sewn product main body 21 can be prevented, and the high-quality loop material 20 can be prevented. Can be sewn to the sewn product main body 21.

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

  For example, in this embodiment, the clamping pressure corresponding to each supply process is described using three levels of a reference pressure value, a weak pressure value, and an intermediate pressure value. However, the present invention is not limited to this. Absent.

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 perspective view which shows the clamping means in the loop material supply apparatus shown in FIG. Pneumatic circuit diagram for driving both clamping members of the clamping means shown in FIG. The perspective view which shows the state which both the clamping members in the clamping means shown in FIG. 2 moved to the direction which mutually spaces apart. The top view which shows the principal part of the loop material supply apparatus and sewing machine of FIG. The block diagram which shows the loop material supply apparatus of FIG. The graph which shows the clamping pressure in each supply process in the loop material supply apparatus of FIG. The perspective view which shows other embodiment of the clamping means in the loop material supply apparatus which concerns on this invention The perspective view which shows the state which the both clamping members in the clamping means shown in FIG. 8 moved to the direction which adjoins mutually. Pneumatic circuit diagram showing another embodiment of the pneumatic circuit including the clamping pressure changing means in the loop material supply device according to the present invention. The perspective view which shows an example of the sewing shape of the loop material supplied by the loop material supply apparatus (A)-(h) is a schematic side view which shows each supply process of the loop material in the conventional loop material supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loop material supply apparatus 2 Sewing machine 3 Clamping means 5 1st clamping member 5a Support part 5b Pressing part 5c Mounting part 5d Auxiliary member 5e Fixing screw 6 2nd clamping member 7 Frame member 9 Air cylinder 9a Cylinder body 9b Cylinder rod 12 Electropneumatic Regulator (Clamping pressure changing means)
Reference Signs List 17 Control means 18 Storage means 20 Loop material 21 Sewing product body 25 Fork member 27 Operation means 28 Display means 29 Input means 30 Detection means

Claims (9)

Clamping means for clamping the loop material constituting the belt loop;
Moving means for moving the clamping means to move each sewing location of the loop material relative to the sewing product body;
In a loop material supply device for a belt loop stitching sewing machine comprising at least control means for controlling the clamping means and the moving means,
The clamping means comprises clamping pressure changing means for changing the clamping pressure for clamping the loop material,
The control means further performs control for setting the clamping pressure in the clamping pressure changing means in accordance with each supply step of supplying a loop material to the belt loop sewing machine.   When the loop material is moved and sewn, the holding pressure by the control means is set so that the loop holding position of the loop material held by the holding means is at least movable and unmovable. The loop material supply device according to claim 1, wherein the loop material supply device can be set.   When the loop material is moved and sewn, the control means can further adjust the moving speed and amount of movement of the loop material relative to the clamping means in a state where the loop clamping position in the loop material is movable. The loop material supply device according to claim 1, wherein the clamping pressure can be set as described above.   Steps of clamping the end of the loop material by a pair of support portions provided in the fork member, and bending the end of the loop material and removing the end from the clamping means by rotating the fork member The control means is configured such that the clamping pressure of the clamping means immediately before the end of the rotation of the fork member is weaker than the clamping pressure of the clamping means when the two support portions sandwich the loop material. The loop material supply device according to any one of claims 1 to 3, wherein the loop material supply device is controlled.   The loop material supply device according to any one of claims 1 to 4, further comprising storage means for storing the value of the clamping pressure set in accordance with each of the supply steps.   6. The loop material supply device according to claim 5, further comprising an operation unit capable of inputting a value of the clamping pressure stored in the storage unit. A detecting means for detecting a thickness dimension of the loop material held by the holding means;
The control means corrects the clamping pressure value stored in the storage means to the clamping pressure value calculated in consideration of the thickness dimension of the loop material detected by the detection means. The loop material supply device according to claim 5 or 6, wherein the loop material supply device is characterized in that:   The loop material supply device according to any one of claims 1 to 7, wherein the clamping pressure changing means is an electropneumatic regulator.   The loop material supply device according to any one of claims 1 to 7, wherein the clamping pressure changing means is a pneumatic circuit in which a plurality of pressure reducing valves having a fixed set pressure are incorporated.

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