JP2006314584A - Cloth holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cloth holder permitting efficient buttoning by means of proper inseam in a buttoning sewing machine. <P>SOLUTION: The cloth holder 80 is used in the buttoning sewing machine 1 for buttoning by stitching on the inseam. The double-folded cloth W or double-layered cloth is held at the distal end of the holder, and the distal end part of the double-folded cloth or double-layered cloth held by the holder is disposed in close proximity on a passing line of the vertical motion of a sewing needle 5 in the sewing. The cloth holder comprises a cloth clasping part 801 and a cloth catching corner part 802. The cloth clasping part 801 is disposed at the distal end for clasping a bent part WA of one of the clothes constituting the double-folded cloth or double-layered cloth bent in a chevron shape at a buttoning position A. The cloth catching corner parts 802, projecting in the direction of the distal end, are disposed on both sides of the cloth clasping part 801. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cloth holder, and more particularly, to a cloth holder provided in a button sewing machine that performs button attachment by rake sewing.

  Conventionally, a button sewing machine that performs button attachment by rake sewing is known. Such a button-attached sewing machine is provided with a cloth holder (tang) 180 as shown in FIG. 6, and the cloth holder 180 is inserted into the folded portion of the folded fabric, The buttons are sewn.

In addition, there are cases where the button sewing machine is used for buttoning a double-folded fabric or a double-layered fabric, but when attaching a button for a double-folded fabric or a double-layered fabric, the button is sewn only to the first fabric, You may want to keep the seam out of the fabric.
In such a case, conventionally, as shown in FIG. 7, two folded fabrics W (or two overlapping fabrics) are folded back while being overlapped, and the fabric holder 180 is inserted into the folded portion WB, as shown in FIG. ), The position of the fabric and the sewing needle is adjusted so that the sewing needle 5a passes only the fabric outside the folded portion WB, and the button is sewn to the folded portion WB.

  However, in the cloth holder 180 described above, the needle drop position of the sewing needle may change due to the needle swinging during sewing. For these reasons, when it is desired to pass the sewing needle only to the outer fabric that is folded back and sew the button only to the first piece of fabric, both the sewing needles as shown in FIG. Buttons are sewn through 5b and the stitches come out also on the second cloth, or conversely, as shown in FIG. 8 (c), the buttons are sewn through the position where the sewing needle 5c does not pierce the cloth at all. There was a problem that could not be attached.

Conventionally, as a cloth holder provided in a button-attached sewing machine that performs button attachment by rake sewing, there is also one described in Patent Document 1. The cloth holder provided in the sewing machine with a button described in Patent Document 1 has a structure in which a cloth is sandwiched by cloth sandwiching portions composed of upper and lower clamping plates, and a folded fabric is sandwiched between the upper and lower clamping plates. By inserting and pinching, the holding force of the cloth becomes stronger than that of the cloth holder described above, and the position of the cloth is difficult to shift.
Japanese Utility Model Publication No. 5-91570

  However, even when the cloth holder described in Patent Document 1 is used, when holding the folded fabric, the cloth is inserted and held to the innermost part of the holding portion to hold the cloth. If the fabric is held by being inserted without being inserted all the way into the back, there arises a problem that the sewing needle as described above does not pierce the fabric.

  If the fabric is thin or weak, the force will be too strong when the fabric is pushed into the nipping part, causing wrinkles at the tip of the fabric. There is a possibility that a problem of sewing will occur, and in this respect as well, the cloth holder described in Patent Document 1 has not yet solved the problem.

  An object of the present invention is to provide a cloth holder capable of satisfactorily performing button attachment by rake sewing in a button attachment sewing machine.

In order to solve the above problems, the invention according to claim 1 is used in a button sewing machine for performing button attachment by rake sewing,
In a cloth holder that holds a double-folded fabric or a double-layered fabric at the tip, and places the held end of the double-folded fabric or the double-layered fabric close to the passing line of the vertical movement of the sewing needle during sewing,
A cloth holding portion that is provided at the tip portion and holds a folded portion in which only one of the fabrics constituting the double-folded fabric or the double-layered fabric is folded at the button mounting position;
A cloth hooking corner provided on both sides of the cloth clamping part and protruding in the tip direction;
It is characterized by having.

In this way, according to the first aspect of the present invention, the cloth hooks provided on both sides of the cloth holding portion of the cloth holder when the button is attached to the double-folded cloth or the double-layered cloth with the button sewing machine. By arranging the fabric so that it is hooked at the corner, the fabric is folded back at the corner where the fabric is hooked and pulled to the back side of the fabric holding portion. It can be sandwiched and held after being inserted to the holding position. Thereby, the button attachment position of the cloth can be reliably arranged on the passing line of the vertical movement of the sewing needle during sewing.
In addition, when the bi-folded fabric or the double-layered fabric is clamped by the fabric clamping unit, the folded portion where only one of the fabrics constituting the bi-folded fabric or the double-layered fabric is folded at the button mounting position is clamped. Therefore, when you want to sew a button on only one of the fabrics that make up a double-folded fabric or a double-layered fabric, even if the position of the fabric for scooping is shifted due to the sewing needle swinging, There is no need to sew the second piece of fabric. This ensures that the button can be sewn only on one piece of fabric.

The invention according to claim 2 is the cloth holder according to claim 1,
The cloth hooking corner portion is further characterized by a shape that rises substantially upward in the vertical movement direction of the sewing needle.

  As described above, according to the second aspect of the present invention, since the cloth hooking corner has a shape that rises substantially upward in the vertical movement direction of the sewing needle, the cloth is hooked on the cloth hooking corner. It becomes easier, and the fabric can be clamped and held after being inserted to the back side of the clamping portion, that is, an appropriate holding position.

The invention according to claim 3 is the cloth holder according to claim 1 or 2,
The cloth hooking corner portion further protrudes outward.

  In this way, according to the invention described in claim 3, since the cloth hooking corner portion protrudes further outward, the cloth is held on the back side of the holding portion while the cloth hooking corner portion pulls the cloth outward. That is, it can be inserted and held to an appropriate holding position, and the fabric can be easily inserted into the holding portion.

  According to the present invention, it is possible to satisfactorily perform button attachment by rake sewing in a button attachment sewing machine.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
The button-attaching sewing machine 1 automatically sews buttons on a cloth by the cooperation of a sewing needle that moves up and down and a looper. Since the formation of the seam by the operation of the looper and the sewing needle is a known technique, a detailed technique is omitted.

As shown in FIG. 1, the buttoned sewing machine 1 includes a bed portion 2 in which a looper (not shown) is built in a front end portion, a vertical trunk portion 3 erected from the rear end portion of the bed portion 2, and a vertical trunk portion 3. The arm part 4 extended so that it may become parallel with the bed part 2 from the upper part of this, and the control apparatus 9 which controls the buttoned sewing machine 1 whole are provided. In the following description, the front-rear direction and the up-down direction of the buttoned sewing machine 1 are as shown in FIG. 1, and are defined as the Y-axis direction and the Z-axis direction, respectively. A direction perpendicular to the paper surface of FIG. 1 is a left-right direction (X-axis direction).
Further, the button sewing machine 1 can perform various button sewings by independently transporting the button B, the fabric W and the like independently. Hereinafter, various mechanisms for transporting buttons and the like will be described in detail.

  A needle bar 6 having a sewing needle 5 is provided at the distal end of the arm portion 4 so as to extend downward. Further, inside the arm portion 4, a needle bar up / down mechanism 11 that moves the sewing needle 5 up and down by moving the needle bar 6 up and down, and swings the needle bar 6 left and right to swing the sewing needle 5 left and right. A needle bar swing mechanism 15 is provided. Accordingly, the needle bar 6 can swing the sewing needle 5 at the lower end thereof along the X-axis direction (left-right direction) while moving up and down.

  As shown in FIG. 1, the needle bar up-and-down mechanism 11 has a needle bar up-and-down motor 12 for moving the needle bar 6 up and down, and this needle bar up-and-down motor 12 passes through a crank mechanism (not shown). 6 is connected. The needle bar up / down motor 12 is provided with an encoder 13 for detecting a driving state such as a rotation angle and a driving speed. The needle bar up / down motor 12 and the encoder 13 are electrically connected to the control device 9. That is, the control device 9 controls the needle bar up / down motor 12 based on the driving state input from the encoder 13.

  The needle bar swinging mechanism 15 has a needle bar swinging motor 16, and when this needle bar swinging motor 16 is driven, the needle bar support is swingable around the Y-axis direction (front-rear direction). The needle bar 6 is swung left and right by swinging a material (not shown) left and right. As shown in FIG. 1, the needle bar swing motor 16 is electrically connected to the control device 9, and is driven in conjunction with the needle bar vertical motor 12 based on the control of the control device 9. Yes.

In addition, the button sewing machine 1 is provided with a button adjustment mechanism 20 that adjusts the buttons so as to be in a predetermined state on the moving path of the sewing needle 5.
The button adjustment mechanism 20 includes a button holding arm 21 that is supported in a suspended manner at an intermediate lower portion of the arm portion 4 and that has a tip portion extended to the vicinity of the vertical movement path of the sewing needle 5. The button holding arm 21 is moved along the Y-axis direction (front-rear direction) with respect to the arm unit 4 by the front-rear movement motor 22, and is Z-axis direction (up-down direction) with respect to the arm unit 4 by the vertical movement motor 23. ) To move along.

  Further, the button holding arm 21 is provided with a button holding mechanism (not shown) for holding the button B so that the button B can be switched between a horizontal state and a vertical state, and the button holding mechanism holds the button B held. A button rotation cylinder 25 for switching between a horizontal state and a vertical state is provided. When the button B is in the horizontal state, rake sewing or solid stitching is performed, and when the button B is in the standing state, root winding sewing is performed. The button holding mechanism includes a left / right linear motor 24 for positioning the button B by moving the button B along the X-axis direction (left / right direction) with respect to the button holding arm 21. The button B can be positioned at an arbitrary position in the X-axis direction by the control of the linear motor 24 for left / right movement.

  Each drive source (the forward / backward movement motor 22, the up / down movement motor 23, the left / right movement linear motor 24, and the button rotation cylinder 25) provided in the button adjustment mechanism 20 is electrically connected to the control device 9 as shown in FIG. And is controlled by the control device 9.

The upper surface of the bed portion 2 is a mounting table on which the cloth W, which is a sewing object, is placed and placed when performing normal button sewing (so-called solid stitching) that is not rake stitching.
Further, the bed portion 2 is provided with a fabric holding mechanism 70 that holds the fabric W at the leading end thereof and feeds the fabric W in the Y-axis direction (front-rear direction) using the feed motor 71 as a drive source.

  On the other hand, a rear end portion of the cylinder base 72 extending in the front-rear direction is fixed to the lower portion of the bed portion 2. A tongue support 73 formed in an arc shape is attached to the front end of the cylinder base 72 so as to be rotatable about an axis in the X-axis direction (left-right direction). A tongue 80 as a cloth holder for holding the fabric W at the time of rake stitching or root winding sewing is fixed to the distal end portion of the tongue support portion 73.

A tongue cylinder 81 for driving the tongue 80 is installed at the center of the cylinder base 72 so as to be rotatable about an axis in the X-axis direction (left-right direction).
And the cloth holding part (illustration omitted) which clamps and hold | maintains the cloth W with the tongue 80 is provided in the front-end | tip part of the bed part 2. As shown in FIG. The fabric holding part has two spring clamping parts, and each spring clamping part is composed of two plate springs facing each other in the vertical direction.

  In the fabric holding mechanism 70 described above, the tongue 80 is raised and lowered together with the tongue support portion 73 by the power of the tongue cylinder 81. Further, the tongue 80 is integrally moved together with the fabric W by the power of the feed motor 71 so as to move in the front-rear direction (that is, the fabric feed direction). As shown in FIG. 1, the feed motor 71 and the tongue cylinder 81 are electrically connected to the control device 9 and are controlled by the control device 9.

  The tongue 80 is mounted on the front end portion of the bed portion 2 with the front end portion facing rearward, and is formed so that the fabric W is folded and attached to the front end portion of the tongue 80. ing. The distal end portion of the tongue 80 can be brought into and out of contact with the vertical movement path of the sewing needle 5 by the rotation of the base end portion thereof, and can approach or be separated from the passing line of the sewing needle 5 in the vertical direction. Can be done. Further, when the cloth W is folded back at the front end portion of the tongue 80 and is turned to the vertical movement path side of the sewing needle 5, the front end of the folded cloth W coincides with the vertical movement path of the sewing needle 5. Thus, the amount of rotation is regulated by a contact member (not shown), and when the operator holds the fabric W and rotates the tongue 80 toward the sewing needle 5, the leading end of the fabric W is automatically positioned. It has come to be.

  Further, the tongue 80 is rotated by using the tongue cylinder 81 as a drive source, and a tongue sensor for detecting the approach when the tip of the tongue 80 is brought close to the vertical movement path of the sewing needle 5 is provided on the mounting table. The tongue cylinder 81 is drawn to the use position where the tip end of the tongue 80 is closest to the vertical movement path of the sewing needle 5 by the output of. When the tongue 80 moves to the use position, a leaf spring is provided at the front end portion of the mounting table as a fabric holding portion that holds and holds the fabric W set at the front end portion of the tongue 80 together with the tongue 80. The tongue cylinder 81 is automatically turned OFF when the sewing is completed, and the tongue 80 is tilted forward and returned to the original standby position.

  As shown in FIGS. 2 and 3, the front end of the tongue 80 is provided with two cloth holding portions 801 for holding the cloth, and each of the cloth holding portions 801 includes two leaf springs that are vertically opposed to each other. It is configured. By inserting and interposing the fabric into the fabric clamping unit 801, the fabric can be easily and reliably held.

  Further, on both outer sides of the two cloth sandwiching portions 801 of the tongue 80, cloth hooking corner portions 802 protruding in the tongue tip direction are provided. Further, the cloth hooking corner portion 802 of the present embodiment has a shape that rises substantially upward in the vertical movement direction of the sewing needle, and additionally projects outward. It is desirable that the both ends of the cloth hooking corners 802 protrude to the farthest part (the deepest side) of the cloth clamping part 801 and farther away (the rear side in FIG. 1). When the cloth hook corner 802 has the shape as described above, the cloth is easily hooked on the cloth hook corner. When the fabric hook corner 802 is arranged so as to hook the fabric, as shown in FIG. 5, the fabric is folded back at the cloth hook corner 802 and pulled to the outside and the back side of the cloth holding portion 801. Can be clamped and held after being inserted to the back side of the cloth clamping portion 801, that is, an appropriate holding position. Thereby, the button attachment position of the cloth can be reliably arranged on the passing line of the vertical movement of the sewing needle during sewing. In the description of the tongue 80, all the words indicating the direction are premised on the case where the tongue 80 is in the use position (the tip is closest to the vertical movement path of the sewing needle).

In the present embodiment, the cloth holding portion 801 and the cloth hooking corner portion 802 are formed by bending a single sheet metal. In addition, a U-shaped notch 803 is formed between the two cloth clamping portions 801, and when the button W is sewn to the fabric W by rake stitching, the notch 803 is connected to the tip of the tongue 80. The structure avoids interference with the sewing needle 5.
The mounting table and the tongue 80 described above are supported by the rear main body of the bed 2 so as to be movable in the Y-axis direction (front-rear direction), and can be moved and positioned by the feed motor 71.

  Further, when the tongue 80 of the present invention holds the double-folded fabric W (or two-layered fabric) as shown in FIG. 4 (a) for buttoning by rake sewing, as shown in FIG. 4 (b). The folded portion WA is formed by folding only one of the fabrics constituting the folded fabric W (or the double-layered fabric) at the button attachment position A. And as shown in FIG. 5, the said bending part WA is inserted in the cloth clamping part 801, and is clamped. By doing in this way, when it is desired to sew a button on only one of the fabrics constituting the double-folded fabric W (or two-layered fabric), the position of the fabric to be scooped due to the sewing needle 5 swinging or the like is Even if it is slightly shifted, the second piece of fabric will not be sewn. This ensures that the button can be sewn only on one piece of fabric.

  Next, the control device 9 will be described. As shown in FIG. 1, the control device 9 has a basic configuration of an arithmetic processing device having a CPU 91, a RAM 92, a ROM 93, and a system bus connecting them. As described above, the control device 9 includes the needle bar up / down motor 12, the encoder 13, the needle bar swing motor 16, the forward / backward movement motor 22, the vertical movement motor 23, the left / right movement linear motor 24, the button rotary cylinder 25, The feed motor 71 and the tongue cylinder 81 are electrically connected, and further, for example, a display device 94 for displaying an image such as a liquid crystal display, an input device 95 for inputting various instructions for sewing, and an instruction for starting sewing The operation pedal 96 used is electrically connected. In addition to the above, the control device 9 is connected to each drive unit of the buttoned sewing machine 1 and the like.

  Based on various instructions from the input device 95 and the operation pedal 96, the control device 9 controls various drive units according to a control program and control data written in the ROM 93.

  The input device 95 is, for example, a touch panel provided on the display surface of the display device 94. The input device 95 detects that the display surface of the display device 94 has been touched and outputs a message to that effect to the CPU 91.

The button-equipped sewing machine 1 having the above configuration moves the button B in the X-axis direction by driving the left-right movement linear motor 24 and moves in the Y-axis direction by driving the front-rear movement motor 22. The Z-axis direction can be performed by driving the vertical movement motor 23. That is, the button holding arm 21 holding the button B can be positioned relative to the vertical movement path of the sewing needle 5 by the cooperation of the forward / backward movement motor 22 and the left / right movement linear motor 24.
Further, the fabric W can be moved in the Y-axis direction by driving the feed motor 71. In addition, the needle drop position of the sewing needle 5 can be positioned in the X-axis direction by driving a needle bar swing motor 16 that swings the needle bar 6 in the X-axis direction. That is, the needle bar swing motor 16 and the feed motor 71 cooperate to position the fabric W relative to the vertical movement path of the sewing needle 5.
That is, the needle bar swing motor 16, the forward / backward movement motor 22, the left / right movement linear motor 24 and the feed motor 71 cooperate to hold the button B and the tongue 80 held by the button holding arm 21. The needle drop position of the sewing needle 5 is relatively positioned with respect to the fabric W. The feed motor 71 also functions as a moving means for retracting the tongue 80 from the sewing needle 5.

  Next, rake stitching by the button-equipped sewing machine 1 provided with the cloth holder (tang) 80 of the present embodiment will be described in detail.

First, only one of the fabrics constituting the double-folded fabric W as shown in FIG. 4 (a) is mountain-folded at the button attachment position A to form a bent portion WA as shown in FIG. 4 (b). To do.
Next, as shown in FIG. 5, the operator places the cloth W on the two cloth hook corners 802 of the cloth holder 80. Then, the fabric W is inserted to the back side of the two fabric clamping portions 801 and clamped. Thereafter, the fabric W together with the tongue 80 is held by the spring clamping portion of the fabric holding portion (not shown) of the fabric holding mechanism 70.

  When the fabric W is set in the fabric holding portion, the button B held by the button holding mechanism is moved to a predetermined position by the button adjustment mechanism (the forward / backward movement motor 22 and the left / right movement linear motor 24) 10 and also the fabric. W is also moved to a predetermined position by the cloth holding mechanism (feed motor 71) 70. That is, the fabric holding mechanism 70 moves the fabric W so that the notch 803 is positioned directly below the sewing needle 5, and the button adjustment mechanism 10 is positioned directly below the sewing needle 5 (on the passing line of the vertical movement). Move button B to. Thereby, the preparation for rake sewing is completed.

Next, the needle bar swing mechanism 15 positions the sewing needle 5 immediately above the button hole. The cloth holding mechanism 70 reciprocates the cloth W back and forth while maintaining the relative positional relationship between the button B and the cloth W while the needle bar up / down motor 12 moves the sewing needle 5 up and down together with the needle bar 6. While moving, the back-and-forth moving motor 22 reciprocates the button B back and forth. As a result, the sewing needle 5 drops alternately in the two button holes, and scoop sewing is performed.
When the rake sewing is completed, the thread cutting mechanism cuts the upper thread once, raises the button B, and thereafter, the root winding sewing is performed. A detailed description of the neckline sewing will be omitted.

As described above, according to the cloth holder of the present embodiment, when buttoning by rake stitching is performed on a double-folded cloth or a double-layered cloth with a button sewing machine, the cloth holder is provided on both sides of the cloth holding portion in the cloth holder. By arranging the fabric to be hooked on the cloth hook corner, the cloth is folded back at the cloth hook corner and pulled to the back side of the cloth holding portion, so that the fabric can be easily and reliably connected to the back side of the cloth holding portion, that is, It can be sandwiched and held after being inserted to an appropriate holding position. Thereby, the button attachment position of the cloth can be reliably arranged on the passing line of the vertical movement of the sewing needle during sewing.
In addition, when the bi-folded fabric or the double-layered fabric is clamped by the fabric clamping unit, the folded portion where only one of the fabrics constituting the bi-folded fabric or the double-layered fabric is folded at the button mounting position is clamped. Therefore, when you want to sew a button on only one of the fabrics that make up a double-folded fabric or a double-layered fabric, even if the position of the fabric for scooping is shifted due to the sewing needle swinging, There is no need to sew the second piece of fabric. This ensures that the button can be sewn only on one piece of fabric.

  Further, in this embodiment, the cloth hooking corner has a shape that rises substantially upward in the vertical movement direction of the sewing needle, so that the cloth can be more easily hooked to the cloth hooking corner and more reliably. Can be sandwiched and held after being inserted to the back side of the sandwiching portion, that is, an appropriate holding position.

  Furthermore, in this embodiment, since the cloth hooking corner portion protrudes further outward, the cloth is pulled to the outer side at the cloth hooking corner portion, while the cloth is pulled to the back side of the holding portion, that is, to an appropriate holding position. It can be inserted and pinched, and the fabric can be easily inserted into the pinching portion.

  As a result, according to the cloth holder of the present embodiment, it is possible to satisfactorily perform buttoning by scoop sewing in the buttoning sewing machine.

  Of course, the present invention is not limited to the above-described embodiment and can be modified as appropriate.

It is explanatory drawing showing schematic structure of a button sewing machine provided with the cloth holder which concerns on this invention. It is a perspective view showing the cloth holder which concerns on this invention. It is a top view showing a part of cloth holder of Drawing 2. It is a figure showing the mode of the cloth clamped by the cloth holder at the time of rake sewing. It is a perspective view showing the state where the cloth holder clamped the cloth at the time of rake sewing. It is a perspective view showing the conventional cloth holder. It is a perspective view showing the state where the cloth holder of Drawing 6 held cloth. It is explanatory drawing showing the passing position of the sewing needle at the time of scooping using the cloth holder of FIG. 6, (a) is a side view showing the normal passing position of the sewing needle, (b) It is a side view showing the case where the malfunction which a sewing needle sews to the 2nd cloth has arisen, (c) represents the case where the malfunction which the sewing needle passes through the position which does not pierce the cloth at all occurs It is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine with button 2 Bed part 4 Arm part 5 Sewing needle 6 Needle bar 9 Control device 11 Needle bar vertical mechanism 12 Needle bar vertical motor 13 Encoder 15 Needle bar swing mechanism 16 Needle bar swing motor 20 Button adjustment mechanism 21 Button holding Arm 22 Motor for moving back and forth 23 Motor for moving up and down 24 Linear motor for moving left and right 25 Button rotation cylinder 70 Cloth holding mechanism 71 Feed motor 80 Tang (cloth holder)
81 Tongue cylinder 801 Cloth clamping part 802 Cloth hook corner 803 Notch B Button W Cloth (Folded cloth)
WA bent part A Button mounting position

Claims (3)

Used for button sewing machines that perform button attachment by rake sewing,
In a cloth holder that holds a double-folded fabric or a double-layered fabric at the tip, and places the held end of the double-folded fabric or the double-layered fabric close to the passing line of the vertical movement of the sewing needle during sewing,
A cloth holding portion that is provided at the tip portion and holds a folded portion in which only one of the fabrics constituting the double-folded fabric or the double-layered fabric is folded at the button mounting position;
A cloth hooking corner provided on both sides of the cloth clamping part and protruding in the tip direction;
A cloth holder characterized by comprising.   The cloth holder according to claim 1, wherein the cloth hooking corner portion further has a shape that rises substantially upward in the vertical movement direction of the sewing needle.   The cloth holder according to claim 1 or 2, wherein the cloth hooking corner part further protrudes outward.

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