JP5305273B2 - Button attaching method and its sewing machine - Google Patents

Abstract

The method involves shifting front button and sewing thread holders (4) to removing position of mounting plate (6) for button sewing. The holders are reversed so that buttons are set in vertical position. The thread is wound around button sewing thread by repeated movements of needles (3) that penetrate intermediate position of sewing thread between front button and thread holder. The yarn wound around peripheral portion of front button is cut. The holders are returned to original position so that buttons are set in horizontal position and thread holder is moved backward. An independent claim is included for button sewing machine.

Description

  The present invention mainly sews a front button such as a flat button on the surface side of the fabric such as men's and women's clothing, and sews a force button on the back side of the fabric, and further, between the front button and the fabric. The present invention relates to a buttoning method for performing root winding sewing by winding a root winding thread around a button sewing thread positioned in the sewing machine, and a sewing machine therefor.

  Using a sewing machine to sew the front button and sew the force button to reinforce the sewing, and the root winding sewing to further secure the button, Set the front button and force button held in the button holder horizontally or in a substantially horizontal position at the specified button attachment position, and set the fabric at the needle drop position between both buttons. In this state, the button hole of both buttons A button attaching process in which both buttons are sewn to the fabric at the same time by moving both button holders independently in a horizontal two-dimensional direction so as to be sequentially positioned at the needle entry position, and after this button attaching process, both buttons The fabric edge so that the fabric edge on the fabric edge side is not in the way of the needle drop. Two steps such neck wrapping sewing step of winding the base-winding yarn around a button sewing thread becomes horizontal or substantially horizontal posture folded state on the opposite side is required and the needle drop position.

  When the above two processes are performed separately using a sewing machine dedicated to button attachment and a sewing machine dedicated to root winding, it is necessary to use two (two types) dedicated sewing machines, so the equipment cost is low. In addition to increasing the number of sewing machines, it is not only necessary to secure a large sewing space for installing (co-arranging) two sewing machines. After removing from the sewing machine, it must be set to the sewing machine side for the root winding and the root winding sewing must be performed. There is a problem of lack of sex.

2. Description of the Related Art Conventionally, a button sewing machine configured so that the above-described two processes, that is, a buttoning process and a root winding process can be performed by one (a kind) sewing machine has already been proposed (see, for example, Patent Document 1).
The conventional button-attached sewing machine disclosed in Patent Document 1 has a cloth with a force button after buttoning is completed at the front end of a cloth holding member that holds the cloth to which the front button is sewn in a folded state. A cloth holding means with a force button that can be held in a state where the end portion is folded back on the side opposite to the needle drop position is attached, and the cloth holding means with a force button is attached to the needle drop position at the tip of the cloth holding member. The position can be switched between a retracted position away from the position and a root winding sewing position near the needle drop position at the tip of the fabric holding member.
In such a conventional button sewing machine, the button holding step is performed by retracting the cloth holding means with force button away from the needle drop position at the tip of the cloth holding member, and then holding the cloth with force button. By switching the means close to the needle drop position at the tip of the fabric holding member, the buttoning step and the root winding sewing step can be performed using a single sewing machine, such as performing the root winding sewing step.

  Japanese Patent No. 4198023

However, in the conventional buttoned sewing machine disclosed in Patent Document 1, it is necessary to manually switch the position of the force button-equipped fabric holding means in the buttoning process and the root winding sewing process. In particular, when the buttoning process is completed and the process proceeds to the next root winding sewing process, the cloth with the force button is once removed from the cloth holding member, and then the position of the cloth holding means with the force button is switched. A large amount of manual work (manufacturer) at the time of transition from the buttoning process to the root winding sewing process, such as re-setting (changing) the cloth with the force button on the cloth holding means with the force button whose position has been switched. It takes time and effort.
Accordingly, although the buttoning process and the root winding sewing process can be performed using a single sewing machine, the above-described large and cumbersome work is required when switching between the two processes. There was a problem that the working efficiency could not be improved sufficiently.

  The present invention has been made in view of the above-mentioned circumstances. In addition to being able to perform a buttoning step and a root winding sewing step using a single sewing machine, both steps can be performed continuously without requiring manual operation. It is an object of the present invention to provide a buttoning method and a sewing machine that can achieve a remarkable improvement in workability and work efficiency, and that can perform root winding sewing reliably and stably without mistakes.

  In order to achieve the above object, a buttoning method according to the present invention includes a front button held by a front button holder and a force button held by a force button holder, with a predetermined buttoning position via both button holders. Set the horizontal or substantially horizontal posture on the mounting plate and set the cloth at the needle drop position between the buttons, and the button holes of the front button and the force button are sequentially positioned at the needle drop position. A button attaching step for simultaneously sewing both buttons to the fabric while moving both button holders independently with respect to the needle drop position, and a sewing thread holder having a thread engaging portion at the front end on the front button side. The front button is moved by advancing and moving along the fabric surface of the sewing thread, and by engaging the button sewing thread positioned between the front button and the fabric with the tip thread engaging portion of the sewing thread holder. The front button and the fabric are held by the rudder and the sewing thread holder, and the force button holder is retracted from the mounting plate while the cut end portion of the button sewing thread cut after the force button is sewn is cut. A sewing button holding step, a holder position separating step for moving the front button holder and the sewing thread holder holding the front button and the cloth to a position separated from the mounting plate, and a front button holder and A button reversing step for reversing the sewing thread holder so that both buttons are in a vertical or substantially vertical posture, and a fabric end that hangs downward from the button sewing position by the reversal is folded to the opposite side to the front button side, and The front button holder and the sewing thread holder that have been moved to the separated position are moved back on the mounting plate to generate Subsequent to the reverse button returning step of further folding the end, the first winding operation of the root winding and the first winding operation of the root winding for dropping needles at both positions of the button sewing thread located between the front button and the sewing thread holder. The root winding thread is wound around the button sewing thread by the multiple needle operation of the root winding which repeats the second and third needle movements of the button sewing thread alternately on both sides of the button sewing thread a plurality of times. At least after the second winding operation of the root winding sewing process in the root winding sewing process and the root winding sewing process, in a state of being connected to the root winding thread supplied by the first winding operation of the root winding from the surface side of the button hole of the front button A thread cutting step of cutting a thread wound around a part of the front button, and the front button holder and the sewing thread holder are reversed so that the front button and the force button are in a horizontal or substantially horizontal posture. And a reverse reversing step in which the sewing thread holder is moved backward, and these steps are sequentially performed.

  In order to achieve the same object as described above, the button-attached sewing machine according to the present invention includes a front button holder that holds the front button in a state that can be reversed between a horizontal or substantially horizontal posture and a vertical or substantially vertical posture; A force button holder that holds the force button in a horizontal or substantially horizontal position, a placement plate that is installed at a predetermined button attachment position and can support the force button holder, and the front button holder and the force button holder are placed horizontally. Or two button holder moving means for moving each separately along a substantially horizontal plane, and setting the front button and the force button in a horizontal or substantially horizontal posture via the both button holders on the button mounting plate, and When the fabric is set at the needle drop position between the two buttons, the two button holders are moved so that the button holes of these buttons are sequentially positioned at the needle drop position. By independently controlling the movement of the step with respect to the needle entry position, the front button and the force button are sewn to the fabric at the same time, and both buttons are reversed to a vertical or substantially vertical posture so that they are between the front button and the fabric. Root winding first needle operation for dropping the needle stitches between the two sides of the button sewing thread that has been stretched, and second root winding that causes the button sewing yarns to be alternately dropped across the button sewing thread after the first needle winding operation. A button-attached sewing machine configured to perform root winding sewing for winding a root winding thread around a button sewing thread by a root winding multiple needle operation that repeats the third needle operation a plurality of times, After the force button is sewn on the fabric, it can be moved forward along the fabric surface on the front button side, and the button button and fabric can be held by engaging the button sewing thread spanned between the front button and the fabric. Sewing Move the thread holder, the sewing thread holder, and the front button holder to a position away from the mounting plate with the cut end portion of the button sewing thread that has been cut after the force button is sewn cut. Reverse the front button holder and sewing thread holder so that both buttons are in a vertical or substantially vertical position at a spaced position, and the reverse button button and sewing thread holder are returned and moved back onto the mounting plate. The mechanism is wound around a part of the peripheral portion of the front button in a state of being connected to the root winding thread supplied by the first winding operation of the root winding from the surface side of the button hole of the front button at least after the second winding operation of the root winding. A thread cutting tool that cuts the thread to be cut, and an end of the fabric that hangs downward from the button sewing position by reversing the buttons to the vertical or substantially vertical posture. Further, when returning to the mounting plate described above, it is characterized in that it comprises fabric end part folding means that folds to the side opposite to the front button side.

According to the button attaching method and the sewing machine according to the present invention having the above-described characteristic configuration, the front button and the force button set in a horizontal or substantially horizontal position on the mounting plate via the button holders with respect to the needle drop position. By independently controlling the movement, the front button and the force button are sewn simultaneously on the fabric set at the needle entry position between the two buttons regardless of the number of button holes and the hole pitch of both buttons. Can be buttoned. After the button is attached, the front button and the cloth are held by the front button holder and the sewing thread holder by engaging the thread engaging portion of the sewing thread holder with the button sewing thread between the front button and the cloth. The front button holder and the sewing thread holder) are moved to a position separated from the mounting plate, and the front button holder and the sewing thread holder are reversed so that both buttons are in a vertical or substantially vertical posture at the separated position, and are reversed. By moving the rear button holder and sewing thread holder back onto the mounting plate, the end of the cloth that hangs downward from the button sewing position is folded to the opposite side of the front button, and the end of the cloth is a needle. It is possible to perform predetermined root winding sewing so as not to obstruct the fall.
In addition, the cut end portion of the button sewing thread cut after the force button is sewn can be moved to the separated position while keeping the cut state without being wiped off the upper side of the needle drop position by a wiper or the like. By reversing and returning and shifting to the root winding sewing, it is possible to give tensile resistance to the root winding thread supplied at the time of the first needle winding operation, and to move the root winding thread in the vertical movement path of the needle or It can be held in a nearby position. As a result, even in the case of the first stitch operation of the root stitch of space stitching where the needle cannot be dropped on the fabric, the needle thread loop can be normally formed without the thread coming out of the thread hole of the needle. The looper can reliably capture the yarn loop. Therefore, predetermined root winding sewing can be performed reliably and stably without mistakes.
Further, in order to ensure the first winding operation of the root winding, the thread wound around a part of the peripheral portion of the front button is cut after the second winding needle operation, so that it remains on the button hole surface side of the front button. The sewing part can easily pull out and remove the thread portion at any time after the root winding sewing, thereby eliminating the deterioration of the appearance due to the remaining thread.

  As described above, by providing a process or mechanism for reciprocating the front button holder and the sewing thread holder between the position on the placement plate and the position separated from each other, the button attaching process and the subsequent root winding sewing process are performed as a single unit. In addition to being able to perform using the sewing machine of this type, when shifting to the root winding stitching process after the buttoning process, it requires laborious work such as manually changing or reattaching the cloth that has been buttoned. Therefore, the buttoning process and the root winding sewing process can be performed continuously, and the root winding sewing can be performed reliably and stably. Thereby, it is possible to remarkably improve the workability and work efficiency of the button attachment including the sewing of the force button and the root winding, and it is possible to achieve the improvement of the productivity of the buttoned clothes.

  In the buttoning method according to the present invention, the yarn cutting step may be performed after the second operation of the root winding, but is preferably performed after the third operation of the root winding (Claim 2). In this case, the thread wound around a part of the peripheral part of the front button is cut after the third needle operation of the root winding with a stable sewing condition such as thread tightening, so that the root winding itself can be stabilized and also the thread cutting can be performed. It can be ensured.

  Further, in the button attaching method according to the present invention, the holder position separation movement step moves the front button and the fabric held by the front button holder and the sewing thread holder substantially horizontally from the mounting plate toward the sewing work position. And a step of moving the table button holder and the sewing thread holder reversed after the button reversing step of reversing both buttons at the horizontally moved sewing work position from the sewing work position to the upper position thereof, and In the reverse button returning step, the table button holder and the sewing thread holder that have been moved upward are moved substantially horizontally from the position above the sewing work position to the position above the mounting plate, and then lowered from the position onto the mounting plate. The procedure (Claim 3) or the holder position separation movement process is a table button holder and a sewing thread. The front button and the cloth held by the rudder are moved upward from the mounting plate to the upper position of the mounting plate, and the reverse button return step is moved upward to the upper position of the mounting plate. And a step of lowering the dough end portion after the reversing step at that position from the upper position of the mounting plate onto the mounting plate while folding the fabric end portion to the side opposite to the front button side (claim) Any of Item 4) may be adopted.

  Further, in the button sewing machine according to the present invention, as the root winding sewing switching mechanism, the sewing thread holder and the front button holder are moved substantially horizontally from the above-mentioned placing plate toward the sewing work position and reversed. Thereafter, the sewing machine is moved upward from the sewing work position to the upper position of the sewing work position, and the inverted button button holder and sewing thread holder are returned from the upper position of the sewing work position to the upper position of the mounting plate substantially horizontally. It is possible to easily realize the button attaching method by the procedure as in the former by using the one that is configured to move downward from the position onto the mounting plate after being moved (Claim 6). Further, as the root winding sewing switching mechanism, the sewing thread holder and the front button holder are moved upward from the mounting plate to the upper position of the mounting plate and reversed. After that, it is possible to easily realize the button attaching method according to the latter procedure by using the one configured to move downward from the upper position of the mounting plate onto the mounting plate (Claim 8). Is possible.

  Further, in the button sewing machine according to the present invention, when both buttons are inverted to the vertical or substantially vertical posture, the end of the cloth that hangs downward from the button sewing position is placed on the side opposite to the front button side before the root winding sewing. As the cloth folding means for folding, when the table button holder and the sewing thread holder after reversing are moved back approximately horizontally from the upper position of the sewing work position to the upper position of the mounting plate, the edge portion of the cloth is brought into contact with the mounting plate. Thus, the means for folding the fabric end to the side opposite to the front button side (Claim 7), or the front button holder and the sewing thread holder after being inverted are moved downward from the upper position of the mounting plate onto the mounting plate. Any means may be used to push the fabric end portion into the side opposite to the front button side before folding, and in particular, means for folding by bringing the fabric end portion into contact with the placing plate. Take It is preferable to. In this case, for example, it is not necessary to install a forced pushing mechanism such as air blowing, the structure is simple, and it is not necessary to provide a special process for folding the edge of the fabric, so that the efficiency of buttoning work is reduced. Can be further improved.

  Furthermore, in the button sewing machine according to the present invention, the thread cutting tool can be moved forward and backward linearly along the position near the back surface of the front button holder, moved forward before the first winding operation of the root winding, It is preferable that the yarn is pulled and cut into pieces by a backward movement after the second winding operation of the root winding.

1 is a schematic overall perspective view of a sewing machine with a button according to the present invention. It is a disassembled expansion perspective view of the force button holder in the sewing machine with a button concerning the present invention. FIG. 5 is an enlarged perspective view showing a front button holder, its driving mechanism, a thread cutting tool, its driving mechanism, and a reversing mechanism in the button sewing machine according to the present invention. FIG. 3 is an enlarged perspective view showing a sewing thread holder and its movement drive mechanism in the button sewing machine according to the present invention. It is a partially cutaway enlarged perspective view showing a root winding sewing switching mechanism in a button sewing machine according to the present invention. It is an enlarged side view of the partial cross section explaining one operation state of a root winding sewing switching mechanism same as the above. It is an expanded side view of the partial cross section explaining the other operation state of a root winding sewing switching mechanism same as the above. (A)-(f) is an expansion schematic front view of the principal part explaining the state from a setting process to a raise process among examples of a buttoning procedure. (G)-(l) is an expansion schematic front view of the principal part explaining the state from an inversion button return process to a post-processing process among examples of a buttoning procedure. (M) is the expansion schematic front view of the principal part explaining the cutting thread removal state after an example of a buttoning procedure is complete | finished. It is a top view of the state of FIG.9 (h). FIG. 10 is a plan view of the state of FIG. FIG. 10 is a plan view of the state of FIG. (A)-(f) is an expansion schematic front view of the principal part explaining the state from a setting process to a raise process among other examples of a buttoning procedure. (G)-(k) is an enlarged schematic front view of the main part explaining the state from the reverse button return process to the post-processing process among other examples of the buttoning procedure, and (l) is the buttoning procedure. It is an expansion schematic front view of the principal part explaining the cutting thread removal state after another example is complete | finished.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic overall perspective view of a button sewing machine according to the present invention. 2 to 5 are perspective views showing the configuration of the main parts of the sewing machine with buttons according to the present invention.

  As shown in FIG. 1, the buttoned sewing machine 1 includes a needle 3 that reciprocates up and down at a fixed position via a lifting drive mechanism provided in a sewing machine arm 2, a front button holder 4 that holds a front button B, A force button holder 5 for holding the force button P, a placing plate 6 on which the force button holder 5 can be placed and supported, a sewing thread holder (see FIG. 3) 7, a thread cutting tool 50 (see FIG. 3), a root A winding sewing switching mechanism 8 and a fabric presser 9 are provided.

  The force button holder 5 is fixed to a distal end portion of a swing arm 12 that can rotate and swing around the axis of the horizontal shaft 11 by contraction and extension of the cylinder 10. As shown in FIG. 2, a pair of left and right holding members 13 and 13 for holding the force button P elastically from both sides in the radial direction are provided on the upper surface of the distal end portion of the force button holder 5 in the rotational and swinging direction. The pair of auxiliary spring members 14 and 14 for assisting the holding force of the force button P by the pair of holding members 13 and 13 and the force button P are sandwiched and held between the force button holder 5 and the cloth is formed on the upper surface. A button receiving plate 15 capable of setting W is attached.

The force button holder 5 holds the force button P on the pair of hugging members 13 and 13 and the button receiving plate 15 at the front end portion by the rotational swing around the axis of the horizontal shaft 11 accompanying the contraction and extension of the cylinder 10. Thus, it is configured to be switchable between a position where it is placed and supported on the placement board 6 and a position retracted from the placement board 6 to the front side of the sewing machine, that is, the sewing work side after the button is attached. .
Needle drop holes 5a and 15a are formed at the distal ends of the force button holder 5 and the button receiving plate 15, and the needle drop holes 6a are also formed in the mounting plate 6 corresponding to these. The needle drop holes 5a and 15a on the side of the force button holder 5 are opened at their tips so as to allow the force button holder 5 to come out from the button sewing thread N1 described later when the force button holder 5 is switched to the retracted position and swung after the button is attached. Has been.

  The horizontal shaft 11 and the mounting plate 6 are spanned and fixed across a pair of left and right force button holder arms 27 and 27. The pair of left and right force button holder arms 27 and 27 are movable frames (known in the art) that can be driven and moved in the front-rear and left-right directions (Y1-Y2 direction and X1-X2 direction) orthogonal to each other in a horizontal plane via two stepping motors. Therefore, the force button holder 5 and the mounting plate 6 are configured to be capable of driving and moving in the front-rear and left-right directions via the movable frame.

  As shown in FIG. 3, the front button holder 4 includes a holder body 16C, a pair of movable holding members 16A and 16B that hold the front button B from both radial sides, and a pair of movable holding members 16A and 16B. An air cylinder 17 that switches between a state in which the front button B is clamped and a state in which the front button B is released by linearly reciprocatingly sliding is provided. The holder body 16C of the front button holder 4 includes the sewing thread holder 7 and the air cylinder 17 An air cylinder 18 for driving and moving the sewing thread holder 7 is attached.

  The front button holder 4 is supported at the lower end portion of the button holder arm 19 so as to be rotatable about a horizontal axis, and the front button B is connected to the front button B via the connecting rods 21 and 22 by the expansion and contraction of the air cylinder 20. It is configured to be switchable between a state in which it is held in a horizontal or substantially horizontal posture and a state in which it is reversed to a vertical or substantially vertical posture.

  As shown in FIG. 4, the sewing thread holder 7 is fixed to the tip of a holder mounting member 24 that is penetrated and supported by the sewing thread holder base 23 so as to be movable in the horizontal direction. A sewing thread engaging portion 7 a is formed at the tip of the sewing thread holder 7. The sewing thread holder base 23 is fixedly supported on the holder main body 16C of the front button holder 4 via an attachment piece 25 and a screw 26. The other end of the holder mounting member 24 is fixed to the tip of the movable rod 18a of the air cylinder 18, and the sewing thread holder 7 moves forward and backward in the direction of the arrow y1-y2 by the contraction and extension of the air cylinder 18, and the engagement The joint portion 7a is configured to be switchable between a state in which the joint portion 7a is engaged with the button sewing thread N1 (see FIG. 8) after being attached to the button and a state in which it is detached from the button sewing thread N1.

  The yarn cutting tool 50 is formed in a hook shape as shown in FIG. The hook-shaped thread cutting tool 50 is a movable member 52 supported by a cutting tool main body 51 fixedly supported on a side surface of the holder main body 16C of the front button holder 4 via a screw 56 so as to be slidable in the horizontal direction. The arm plate member 53 extending to the sewing thread holder 7 side from the distal end portion is fixed to the distal end portion. The movable member 52 is fixed to the distal end of the movable rod 54 a of the air cylinder 54 supported by the cutting tool main body 51. The thread cutting tool 50 can be advanced and retracted in the direction of the arrow y3-y4 along the position near the back surface of the front button holder 4 by the expansion and contraction of the air cylinder 54. 3 is moved forward to a position close to one movable clamping member 16A, and after the third winding needle operation described later, as shown by the solid line in FIG. 3, toward the other movable clamping member 16B side. By moving backward, the yarn (described later) wound around a part of the peripheral portion of the front button B is drawn and shredded.

As shown in FIG. 5, the button holder arm 19 is fixedly supported by a button holder arm base 28. Between the button holder arm base 28 and the button holder arm base guide mounting base 29 disposed below the button holder arm base 28, there is provided a button holder arm base ascending / descending drive mechanism which is one of the components of the root winding sewing switching mechanism 8. It has been. The button holder arm base guide mounting base 29 is a movable table 30 that can be driven and controlled in the front-rear and left-right directions (Y1-Y2 direction and X1-X2 direction) orthogonal to each other in a horizontal plane via two stepping motors. As a result, the front button holder 4 and the sewing thread holder 7 are controlled to move in the front / rear and left / right directions independently of the force button holder 5 and the placing plate 6 via the movable table 30. It is configured to be possible.
In addition, since the drive movement mechanism of the movable table 30 and its control mechanism are well-known, detailed description and illustration are abbreviate | omitted.

The root winding sewing switching mechanism 8 is configured as follows.
That is, as shown in FIG. 5, the button holder arm base 28 has a plurality (four in the drawing) of rod-shaped guides 31 with respect to the button holder arm base guide mounting base 29 fixed on the movable table 30. Through the vertical direction Z1-Z2. An air cylinder 32 is fixedly supported on the upper surface of the button holder arm base 28, and a lower end portion of the movable rod 33 in the air cylinder 32 is screwed and fixed to a screw hole 34 formed in the button holder arm base 28. .

  The upper end portion of the bolt 35 fixed to the button holder arm base guide mounting base 29 and erected upward is brought into contact with the button holder arm base 28 to restrict the ascending position of the button holder arm base 28. A nut-like upper limit stopper 36 is screwed through a lock nut 37 and a washer 38 so that the position can be adjusted up and down. Further, the button holder arm base 28 has a lower limit stopper 40 for restricting the lowering position of the button holder arm base 28 by contacting a stopper contact 39 fixed to the button holder arm base guide mounting base 29, and a lock nut 41. It is provided so that the position can be adjusted up and down via the.

  In each of the above components, the air cylinder 32 is operated to extend and retract the movable rod 33, whereby the button holder arm base 28 is moved to the lower limit position where the lower limit stopper 40 abuts against the stopper 39 as shown in FIG. 7 and a button holder arm base that can be switched between a state where the button holder arm base 28 is raised to an upper limit position where the button holder arm base 28 abuts against the upper limit stopper 36, as shown in FIG. An elevating drive mechanism is configured, and the above-mentioned neckline sewing is performed by a combination of the button holder arm base elevating drive mechanism, the drive moving mechanism and control mechanism of the movable table 30, and the reverse switching mechanism of the front button holder 4. A switching mechanism 8 is configured.

  The cloth presser 9 is brought into contact with the upper surface of the cloth W set on the button receiving plate 15 of the force button holder 5 from the diagonally upper side through the cylinder 42, thereby causing excessive movement and bending of the cloth W. Is to prevent.

Next, the first button attaching procedure (operation) by the button attaching sewing machine 1 configured as described above is shown in FIGS. 8 (a) to 8 (f), FIGS. 9 (g) to (l) and FIGS. 13 will be described in detail in the following order.
1. Setting process: As shown in FIG. 8A, the front button B held by the front button holder 4 and the force button P held by the force button holder 5 are placed via the button holders 4 and 5. A predetermined buttoning position on the plate 6, that is, a position on the needle drop hole 6 a is set in a horizontal posture, and the fabric W is set on the force button P, and the fabric presser 9 is placed on the upper surface of the set fabric W The dough W is brought into contact with the cloth to hold the cloth W in a predetermined position.
In this setting step, the button holder arm base 28 is lowered to the lower limit position as shown in FIG. 6, and the front button holder 4 holds the front button B in a horizontal or substantially horizontal posture. It is switched to the state to do.

  2. Buttoning process: The front and rear button holders 4 and 5 are moved back and forth so that the button hole of the front button B and the button hole of the force button P are sequentially positioned at the needle drop position via the movable table 30 and a movable frame (not shown). As shown in FIG. 8B, the needle 3 is reciprocated up and down with respect to the needle drop hole while independently controlling movement in the left and right directions (Y1-Y2 direction and X1-X2 direction). Buttons B and P are sewn simultaneously on the front and back surfaces of the fabric W. Then, after the force button P is sewn, the sewing thread N on the side connected to the needle 3 is cut into a relatively long one and a short one at the lower portion of the mounting plate 6. The shorter one is the thread end portion Nf at the end of buttoning of the front button B and the force button P.

  3. Sewing button holding step: As shown in FIG. 8 (c), the sewing thread holder 7 advances and moves in the direction of arrow y1 shown in FIG. The thread engaging portion 7a of the holder 7 is engaged with the button sewing thread N1 positioned between the front button B and the fabric W. Thus, the front button B and the fabric W are held by the front button holder 4 and the sewing thread holder 7. Thereafter, the force button holder 5 is sewn on the front side of the sewing machine (operator) from the position where it is placed and supported on the placing plate 6 by the rotational swing around the axis of the horizontal shaft 11 as the cylinder 10 contracts and extends. The cloth presser 9 is retracted to a position diagonally upward from the cloth W.

  4). Holder position separation movement process: As shown in FIG. 8D, the front button holder 4 and the sewing thread are moved by moving the front button holder 4 and the sewing thread holder 7 forward (Y2 direction) via the movable table 30. The front button B, the force button P, and the cloth W held by the holder 7 are horizontally moved from the placement plate 6 toward the position away from the operator. As described above, even when the front button B, the force button P, and the fabric W are moved to the position away from the placement plate 6 toward the operator side, the sewing thread cut after the front button B and the force button P are sewn. N long and short cut end portions Ne and Nf of N are kept cut.

  5. Button reversing step: By causing the air cylinder 20 to contract, the front button holder 4 and the sewing thread holder 7 that have been moved to the operator-side separation position are rotated about the horizontal axis, as shown in FIG. In addition, the front button B and the force button P are inverted so as to have a vertical or substantially vertical posture. Along with this reversal, the fabric end portion We on the fabric edge side of the button attachment portion is in a state of hanging downward.

  6). Ascending step: After the button reversing step, the front button holder arm base 28 is raised to the upper limit position shown in FIG. As the front button holder arm base 28 is raised, the reversed front button holder 4 and sewing thread holder 7 are moved upward (Z1 direction) through the button holder arm 19 as shown in FIG. 8 (f). Is done.

7). Reverse button return step: The front button holder 4 and the sewing thread holder 7 that have been moved upward are moved horizontally through the movable table 30 in the rear direction (Y1 direction), as shown in FIG. 4 and the sewing thread holder 7 are moved back to the upper position of the placing plate 6. At this time, the fabric end portion We hanging downward from the button attachment portion is brought into contact with the placing plate 6, whereby the fabric end portion We is bent to the force button P side opposite to the front button B side.
As described above, the fabric end portion We is brought into contact with the placing plate 6 during the horizontal movement in the rear direction (Y1 direction) of the front button holder 4 and the sewing thread holder 7, and the fabric end portion We is moved to the force button P side. In order to bend reliably, the upper limit position of the front button holder arm base 28 is adjusted and set in advance according to the hanging length of the fabric end portion We hanging downward from the button attachment point.

  8). Lowering step: By causing the air cylinder 32 to contract, the front button holder arm base 28 is lowered to the lower limit position shown in FIG. As the front button holder arm base 28 is lowered, the front button holder 4 and the sewing thread holder 7 reversed through the button holder arm 19 are moved downward (Z2 direction) as shown in FIG. 9 (h). Then, the folded fabric end portion We is further folded until it is in a substantially horizontal posture on the placing plate 6. Immediately after folding of the fabric end portion We shown in FIG. 9 (h), the air cylinder 54 is extended so that the yarn cutting tool 50 is moved through the movable member 52 and the arm plate member 53 as shown in FIG. Then, the front button holder 4 is linearly slid in the direction of the arrow y3 along the vicinity of the back surface of the front button holder 4 and moved forward to a position close to one movable clamping member 16A of the front button holder 4. Further, the cut end portion Ne of the sewing thread N cut after the force button P is sewn is not pulled up above the placing plate 6 by a wiper or the like, for example, and the cloth end portion We that is folded with the main body portion of the cloth W. It is kept in a state located between.

  9. Neck winding sewing process: The front button holder 4 and the sewing thread holder 7 are reciprocated at predetermined pitches in the front-rear Y1-Y2 direction and the left-right X1-X2 direction via the movable table 30, thereby FIG. 9 (i). As shown in FIG. 12, the first winding operation of the needle winding for dropping the needle 3 to the center portion of the button sewing thread N1 located between the front button B and the sewing thread holder 7, and the button following the first winding operation of the root winding. The root winding thread N2 is wound around the button sewing thread N1 and is sewed by repeating the operation of the second needle winding needle 3 and the third needle that drop the needle 3 alternately on both sides of the sewing thread N1 a plurality of times.

  Here, without cutting off the cut end portion Ne of the button sewing thread N cut after the force button P is sewn to the upper side of the needle drop position with a wiper or the like, the cut-off portion is kept in a state of being cut, and the root winding sewing is performed. By shifting to, a tension resistance is given to the root winding sewing thread N supplied at the time of the first root winding needle operation, and the root winding sewing thread N supplied by the first root winding needle operation is changed to the needle 3. It is held at a position near or above the vertical movement path. As a result, even in the case of the first needle operation of the root stitch of space stitching in which the needle 3 cannot be dropped on the fabric W itself, the needle thread loop can be normally formed without the thread coming out of the thread hole of the needle. A looper (not shown) can reliably capture the needle thread loop. Therefore, predetermined root winding sewing can be performed reliably and stably without mistakes.

  10. Thread cutting process: In the root winding process, after the third needle operation of the root winding, the air cylinder 54 is contracted, whereby the thread cutting tool 50 is moved through the movable member 52 and the arm plate member 53 as shown in FIG. As shown in FIG. 13 and FIG. 13, it is slid linearly in the direction of the arrow y4 along the vicinity of the back surface of the front button holder 4 and moved backward to a position near the other movable clamping member 16B of the front button holder 4. . As a result, the thread portion Na wound around a part of the peripheral portion of the front button B in the state where it is connected to the root winding sewing thread N supplied from the surface side of the button hole of the front button B by the first winding operation of the root winding. Disconnected. Of the cut yarn portion Na, the yarn portion Na1 connected to the sewing thread N side is wound into the root wound yarn N2 with the repeated root winding operation after the root winding third needle operation.

  11. Post-processing step: After the root winding sewing step, the front button holder arm base 28 is raised to the upper limit position shown in FIG. 7 by extending the air cylinder 32. As the front button holder arm base 28 is raised, the front button holder 4, the sewing thread holder 7 and the fabric W are moved upward (Z1 direction) through the button holder arm 19 as shown in FIG. Is done. Subsequently, by extending the air cylinder 20 at this raised position, the front button holder 4 and the sewing thread holder 7 are rotated in the opposite directions around the horizontal axis, and the front button B and the force button P are moved horizontally. Alternatively, it is reversed and returned to a substantially horizontal posture. Finally, the sewing thread holder 7 is retracted and moved in the direction of the arrow y2 shown in FIG. 4 along the upper surface of the fabric W by the extension operation of the air cylinder 18, and the pair of movable buttons of the front button holder 4 is moved via the air cylinder 17. The holding of the front button B is released by linearly driving and sliding the holding members 16A and 16B, and as shown in FIG. 9 (l), a predetermined button attached with a force button P and a root winding stitch is applied. To complete.

  Then, after the completion of the first buttoning procedure (operation) described in the above 1 to 11, as shown in FIG. 10 (m), the front button of the yarn portion Na cut by the yarn cutting tool 50 is displayed. The thread portion Na2 remaining on the button hole side of B can be easily pulled upward and removed manually by a sewing manufacturer or the like, so that an unnecessary finish can be eliminated and a good-looking finish can be obtained.

  By automatically and continuously performing each step of the first buttoning procedure (operation) described in 1 to 11 above, buttoning of both the front button B and the force button P and subsequent root winding sewing Can be carried out using a single sewing machine, and when shifting to the root winding sewing process after the buttoning process, it is troublesome to manually replace or reattach the cloth W that has been buttoned. Therefore, it is possible to achieve a significant improvement in workability and work efficiency of predetermined button attachment.

  Further, after the button reversing step, the reversed front button holder 4 and sewing thread holder 7 are once moved upward in the upward direction (Z1 direction) as shown in FIG. In the reverse button returning process in which the sewing thread holder 7 is moved back to the upper position of the placing plate 6, as shown in FIG. 9G, the fabric end portion We that hangs downward from the buttoning position is placed on the placing plate 6. It is possible to bend the cloth end portion We to the force button P side opposite to the front button B side. Therefore, it is not necessary to install a special mechanism for folding the fabric end portion We so as not to disturb the needle drop during the next root winding sewing process, for example, air blowing and a retractable folding tool, and the configuration is simple. It is easy to plan.

  In addition, the cut end portion Ne of the button sewing thread N that has been cut after the force button P is sewn is not wiped away from the upper side of the needle drop position by a wiper or the like, and the root sewing is performed while maintaining the cut state. , The tension resistance can be applied to the root winding sewing thread N supplied at the time of the first winding operation of the root winding, and the root winding sewing thread N is moved to the vertical movement path of the needle 3 or a position near it. Can be held in. As a result, even in the first stitch operation of the root stitch of space stitch where the needle 3 cannot be dropped directly onto the fabric W, the needle thread loop can be normally formed without the thread coming out of the thread hole of the needle. The looper can reliably capture the needle thread loop. Therefore, predetermined root winding sewing can be performed reliably and stably without mistakes.

Next, the second buttoning procedure (operation) by the buttoned sewing machine 1 configured as described above is performed in the order of steps based on FIGS. 14 (a) to (f) and FIGS. 15 (g) to (k). explain in detail.
1. Setting step: exactly the same as 1 in the case of the first button attaching procedure, as shown in FIG. 14A, held in the front button B and the force button holder 5 held in the front button holder 4 The force button P is set in a horizontal position at a predetermined button attachment position on the mounting plate 6, that is, a position on the needle drop hole 6a, through the button holders 4 and 5, and the cloth is placed on the force button P. W is set, and the fabric presser 9 is brought into contact with the upper surface of the set fabric W to hold the fabric W in a predetermined position.
In this setting step, the button holder arm base 28 is lowered to the lower limit position as shown in FIG. 6, and the front button holder 4 holds the front button B in a horizontal or substantially horizontal posture. It is in the state to do.

  2. Button attaching step: exactly the same as 2 in the first button attaching procedure (operation), and the button holders 4 and 5 are attached to the buttons of the front button B via the movable table 30 and the movable frame (not shown). The needle 3 is moved with respect to the needle drop hole while independently controlling the movement in the front-rear and left-right directions (Y1-Y2 direction and X1-X2 direction) so that the hole and the button hole of the force button P are sequentially positioned at the needle drop position. By reciprocating up and down, both buttons B and P are sewn simultaneously on the front and back surfaces of the fabric W as shown in FIG. Then, after the force button P is sewn, the sewing thread N on the side connected to the needle 3 is cut into a relatively long one and a short one at the lower portion of the mounting plate 6. The shorter one is the thread end portion Nf at the end of buttoning of the front button B and the force button P.

  3. Sewing button holding step: exactly the same as 3 in the case of the first buttoning procedure (operation), and as shown in FIG. The thread engaging portion 7a of the sewing thread holder 7 is engaged with the button sewing thread N1 located between the front button B and the fabric W by moving forward in the direction of the arrow y1 shown in FIG. Thus, the front button B and the fabric W are held by the front button holder 4 and the sewing thread holder 7. After that, the force button holder 5 is sewn on the front side of the sewing machine (operator) from the position where it is placed and supported on the placing plate 6 by the rotational swing around the axis of the horizontal shaft 11 as the cylinder 10 contracts and extends. ) Side, and the material presser 9 is retracted to a position diagonally away from the material W.

  4). Holder position separation movement step: By extending the air cylinder 32, the front button holder arm base 28 is raised to the upper limit position shown in FIG. As the front button holder arm base 28 is raised, the front button holder 4 and the sewing thread holder 7 are lifted upward (in the Z1 direction) via the button holder arm 19, and loaded as shown in FIG. 14 (d). It is moved away to a position immediately above the mounting plate 6. In this way, even when the front button B, the force button P, and the fabric W are raised upward, the cut end portions Ne and Nf of the sewing thread N cut after the front button B and the force button P are sewn are cut. It is kept as it is.

  5. Button reversing step: By causing the air cylinder 20 to contract, the front button holder 4 and the sewing thread holder 7 that have been moved to the position immediately above the placing plate 6 are rotated about the horizontal axis, and FIG. ), The front button B and the force button P are inverted so as to have a vertical or substantially vertical posture. Along with this reversal, the fabric end portion We on the fabric edge side of the button attachment portion is in a state of hanging downward.

  6). Folding step of the fabric end: As shown by the arrow in FIG. 14 (f), the fabric end is pushed by blowing air from the front button B side toward the fabric end We hanging downward by reversal. The part We is bent to the side opposite to the front button B side.

  7). Reverse button return step: By retracting the air cylinder 32, the front button holder arm base 28 is lowered to the lower limit position shown in FIG. As the front button holder arm base 28 is lowered, the inverted front button holder 4 and sewing thread holder 7 are lowered downward (Z2 direction) through the button holder arm 19 as shown in FIG. The fabric end portion We which is moved and bent is folded on the placing plate 6 so as to be in a substantially horizontal posture. Immediately after folding of the fabric end portion We shown in FIG. 15 (g), the air cylinder 54 is extended so that the yarn cutting tool 50 is moved through the movable member 52 and the arm plate member 53 as shown in FIG. Then, the front button holder 4 is linearly slid in the direction of the arrow y3 along the vicinity of the back surface of the front button holder 4 and moved forward to a position close to one movable clamping member 16A of the front button holder 4. Further, the cut end portion Ne of the sewing thread N cut after the force button P is sewn is not pulled up above the placing plate 6 by a wiper or the like, for example, and the cloth end portion We that is folded with the main body portion of the cloth W. It is kept in a state located between.

  8). Neck winding sewing process: exactly the same as 9 in the first buttoning procedure (operation), and the front button holder 4 and the sewing thread holder 7 are moved in the front-rear Y1-Y2 direction and left-right X1- through the movable table 30. By reciprocating at a preset pitch in the X2 direction, as shown in FIG. 15 (h) and FIG. 12, the needle 3 is placed at the center of the button sewing thread N1 located between the front button B and the sewing thread holder 7. The root winding first needle operation for dropping the needle winding and the root winding second needle and third needle operation for dropping the needle 3 alternately on both sides of the button sewing thread N1 after the root winding first needle operation are performed a plurality of times. By repeating, the root thread N2 is wound around the button sewing thread N1 and sewed.

  Also in the root winding sewing step, the cut end portion Ne of the button sewing thread N cut after the force button P is sewn is removed by using a wiper or the like above the needle drop position, as in the case of the first buttoning procedure described above. By keeping the state of being cut and shifting to the root winding sewing without being removed, the root winding sewing thread N supplied at the time of the first winding of the root winding is given a tensile resistance, The root winding sewing thread N supplied by the root winding first needle operation is held in the vertical movement path of the needle 3 or a position near it. As a result, even in the first stitch operation of the root stitch of space stitch where the needle 3 cannot be dropped on the fabric W itself, the needle thread loop can be normally formed without the thread coming out of the thread hole of the needle. The looper can reliably capture the needle thread loop. Therefore, predetermined root winding sewing can be performed reliably and stably without mistakes.

  9. Yarn cutting step: In the root winding step, after the third needle operation of the root winding, the air cylinder 54 is contracted, whereby the yarn cutting tool 50 is moved through the movable member 52 and the arm plate member 53 as shown in FIG. As shown in FIG. 13 and FIG. 13, it is slid linearly in the direction of the arrow y4 along the vicinity of the back surface of the front button holder 4 and moved backward to a position near the other movable clamping member 16B of the front button holder 4. . As a result, the thread portion Na wound around a part of the peripheral portion of the front button B in the state where it is connected to the root winding sewing thread N supplied from the surface side of the button hole of the front button B by the first winding operation of the root winding. Disconnected. Of the cut yarn portion Na, the yarn portion Na1 connected to the sewing thread N side is wound into the root wound yarn N2 with the repeated root winding operation after the root winding third needle operation.

  10. Post-processing step: exactly the same as 11 in the first buttoning procedure (moving), and after the root winding sewing step, the air cylinder 32 is extended to move the front button holder arm base 28, The position is raised to the upper limit position shown in FIG. As the front button holder arm base 28 is raised, the front button holder 4, the sewing thread holder 7 and the fabric W are moved upward (Z1 direction) through the button holder arm 19 as shown in FIG. Is done. Subsequently, in this raised position, the front button holder 4 and the sewing thread holder 7 are rotated in the opposite directions around the horizontal axis by extending the air cylinder 20, as shown in FIG. The front button B and the force button P are returned to the horizontal or substantially horizontal posture and reversed. Finally, the sewing thread holder 7 is retracted and moved in the direction of the arrow y2 shown in FIG. 4 along the upper surface of the fabric W by the extension operation of the air cylinder 18, and the pair of movable buttons of the front button holder 4 is moved via the air cylinder 17. The holding of the front button B is released by driving and sliding the holding members 16A and 16B linearly, and the predetermined button attachment with the force button P and the root winding sewing is completed.

  Then, after completion of the second buttoning procedure (operation) described in 1 to 10 above, as shown in FIG. 15 (l), the front button of the yarn portion Na cut by the yarn cutting tool 50 is displayed. The thread portion Na2 remaining on the button hole side of B can be easily pulled upward and removed manually by a sewing manufacturer or the like, and an undesired thread residue can be eliminated to obtain a good-looking finish.

  In the case of the second buttoning procedure (operation) described in 1 to 10 above, as with the case of the first buttoning procedure, buttoning of both the front button B and the force button P and subsequent root winding are performed. In addition to being able to perform sewing with a single sewing machine, when shifting to the root winding sewing process after the buttoning process, the cloth W that has been buttoned is manually replaced or reattached, etc. No complicated work is required, and a significant improvement in workability and work efficiency of predetermined button attachment can be achieved.

  In addition, as in the case of the first buttoning procedure, the cut end portion Ne of the button sewing thread N that has been cut after the sewing of the force button P can be removed to the upper side of the needle drop position with a wiper or the like. By keeping the state of being cut and shifting to the root winding sewing, it is possible to give a tensile resistance to the root winding sewing thread N supplied at the time of the first winding of the root winding, and the root winding sewing thread N The needle 3 can be firmly held in the vertical movement path or a position near the path. As a result, even in the first stitch operation of the root stitch of space stitch where the needle 3 cannot be dropped directly onto the fabric W, the needle thread loop can be normally formed without the thread coming out of the thread hole of the needle. The looper can reliably capture the needle thread loop. Therefore, predetermined root winding sewing can be performed reliably and stably without mistakes.

  Furthermore, when the second buttoning procedure is adopted, after the buttoning step, the front button holder 4 and the sewing thread holder 7 are moved upward to the upper position of the placing plate 6 as shown in FIG. Since the button reversing step can be performed at the raised position, the step of reciprocating the front button holder 4 and the sewing thread holder 7 in the horizontal direction can be omitted, and the buttoning work efficiency can be further improved.

  In the second buttoning procedure, air is most preferably used as the folding means for bending the fabric end portion We. However, a driving pusher may be used, or a rod-shaped member held by the operator's hand. You may make it fold by pushing.

  In the first and second buttoning procedures described above, the thread cutting process is performed after the third winding operation of the root winding where the sewing tone is stable, such as thread tightening, but the present invention is not limited to this. The thread may be cut after the second needle operation.

  In the button sewing machine according to the present invention, in the above embodiment, as the thread cutting tool 50, the front button holder 4 can linearly advance and retreat along the vicinity of the back surface, and the thread portion Na is pulled and shredded by retreating movement. Although the hook-shaped thread cutting tool 50 configured to cut is used, the present invention is not limited to this. For example, a hook-shaped thread cutting tool that can be opened and closed may be used.

  Furthermore, in the above-described embodiment, in the case of the first buttoning procedure and the second buttoning procedure, as shown in FIG. 10 (m) and FIG. The thread portion Na2 remaining on the button hole side of the front button B is described as being manually removed by a sewing manufacturer or the like. However, this thread portion Na2 removal process is also mechanical, Of course, it may be configured to perform automatically.

DESCRIPTION OF SYMBOLS 1 Button attaching sewing machine 4 Front button holder 5 Force button holder 6 Mounting plate 7 Sewing thread holder 8 Neck winding sewing change mechanism 30 Movable table (button holder moving means)
50 Thread cutting tool B Front button P Power button W Fabric We Fabric end N Sewing thread Ne, Nf Thread cut end N1 Button sewing thread N2 Neck thread

Claims (10)

The front button held by the front button holder and the force button held by the force button holder are set horizontally or substantially horizontally on the mounting plate at a predetermined button attachment position via both button holders. A setting process for setting the fabric at the needle drop position between the buttons;
A buttoning step for simultaneously sewing both buttons to the fabric while moving both button holders independently with respect to the needle drop position so that each button hole of the front button and the force button is sequentially positioned at the needle drop position;
A sewing thread holder having a thread engaging portion formed at the tip is moved forward along the fabric surface on the front button side, and is positioned between the front button and the fabric at the tip thread engaging portion of the sewing thread holder. By engaging the button sewing thread, the front button and the cloth are held by the front button holder and the sewing thread holder, and the cut end portion of the button sewing thread cut after the force button is sewn is cut. A sewing button holding process for retracting the force button holder from the mounting plate;
A holder position separation moving step of moving the front button holder and the sewing thread holder holding the front button and the fabric to a position separated from the mounting plate,
A button reversing step of reversing the front button holder and the sewing thread holder so that both buttons are in a vertical or substantially vertical posture at the spaced positions;
The fabric end that hangs downward from the button sewing position due to the inversion is bent to the side opposite to the front button side, and the front button holder and the sewing thread holder that have been moved to the separated position are moved back onto the mounting plate. Reversing button return process to further fold the fabric edge,
The first winding operation of the needle winding to drop the needle thread at the position between both sides of the button sewing thread located between the front button and the sewing thread holder, and alternating between the both sides of the button sewing thread after the first winding operation of the root winding. A root winding sewing step of wrapping and sewing a root winding thread around a button sewing thread by a root winding multi-needle operation that repeats the second and third needle movements to cause needle dropping to a plurality of times;
At least after the root winding second needle operation in the root winding sewing step, the peripheral portion of the front button is connected to the root winding thread supplied by the root winding first needle operation from the surface side of the button hole of the front button. A yarn cutting step of cutting a yarn wound around a part;
A reverse reversing step in which the front button holder and the sewing thread holder are reversed and reversed so that the front button and the force button are in a horizontal or substantially horizontal posture, and the sewing thread holder is moved backward.
A buttoning method characterized by sequentially performing each of these steps.   The buttoning method according to claim 1, wherein the yarn cutting step is performed after the third winding needle operation.   The holder position separation movement step includes a step of moving the front button and the fabric held by the front button holder and the sewing thread holder substantially horizontally from the mounting plate to the sewing work position, and the horizontally moved sewing work. And a step of moving the front button holder and the sewing thread holder which are reversed after the button reversing step for reversing both buttons at the position from the sewing manufacturer position to the upper position thereof, and the reversing button returning step is a lifting movement. 2. The step of moving the front button holder and the sewing thread holder, which are substantially horizontally moved from the upper position of the sewing manufacturer position to the upper position of the mounting plate, and then moved downward from the position onto the mounting plate. 2. The button attaching method according to 2.   The holder position separation movement step is a step of moving the front button and the cloth held by the front button holder and the sewing thread holder upward from the placement plate to the upper position of the placement plate, and the reverse button In the returning process, the material is moved upward to the upper position of the mounting plate, and the fabric end after the reversing process at that position is folded by the folding means to the side opposite to the front button side, and placed from the upper position of the mounting plate. The buttoning method according to claim 1, wherein the buttoning method is a step of moving downward on the plate. A front button holder that holds the front button in a state that can be reversed between a horizontal or substantially horizontal posture and a vertical or substantially vertical posture, a force button holder that holds the force button in a horizontal or substantially horizontal posture, and a predetermined button attachment position. A mounting plate installed and capable of mounting and supporting the force button holder; and two button holder moving means for moving the front button holder and the force button holder separately along a horizontal or substantially horizontal plane, With the front button and force button set horizontally or substantially horizontally on the mounting plate via the button holders, and the fabric set at the needle drop position between the buttons, each button of these buttons By controlling the movement of the two button holder moving means independently of the needle drop position so that the holes are sequentially positioned at the needle drop position, the front button and force The first winding operation of the root winding that sews the tongue to the fabric at the same time and reverses both buttons in a vertical or substantially vertical posture so that the needle is dropped at the position between both sides of the button sewing thread spanned between the front button and the fabric. Following the first winding operation of the root winding, the button sewing thread is operated by the multiple winding operation of the root winding which repeats the second winding and the third needle operation of the button sewing thread alternately on both sides of the button sewing thread a plurality of times. A buttoned sewing machine configured to perform a root winding sewing around a neck thread,
After the front button and the force button are sewed on the fabric, the front button and the fabric are moved forward along the fabric surface on the front button side and engaged with the button sewing thread spanned between the front button and the fabric. The sewing thread holder that can hold the sewing thread, and the sewing thread holder and the front button holder are moved to a position away from the mounting plate with the cut end portion of the button sewing thread cut after the force button is sewn cut. Then, the front button holder and the sewing thread holder are reversed so that both buttons are in a vertical or substantially vertical posture at the separated position, and the inverted front button holder and the sewing thread holder are moved back on the mounting plate. The root winding supplied by the root winding first needle operation from the surface side of the button hole of the front button at least after the root winding second needle operation and the root winding sewing switching mechanism A thread cutting tool that cuts a thread wound around a part of the peripheral part of the front button in a state connected to the button, and a fabric end that hangs downward from the button sewing position by reversing the buttons to the vertical or substantially vertical posture. A button-attached sewing machine comprising: a cloth end folding means that folds to the opposite side to the front button side when returning to the mounting plate.   The root winding sewing switching mechanism is configured to move the sewing thread holder and the front button holder forward from the placement plate toward the sewing work position in a substantially horizontal direction and to reverse the sewing work position from the sewing work position to the sewing work position. The table button holder and the sewing thread holder after being inverted are moved back from the upper position of the sewing work position to the upper position of the above-mentioned mounting plate substantially horizontally and then moved from the position to the mounting plate. The buttoned sewing machine according to claim 5, wherein the sewing machine is configured to move downward.   The cloth edge folding means contacts the cloth edge with the placing plate when the table button holder and the sewing thread holder after reversing are moved back from the upper position of the sewing work position to the upper position of the placing plate substantially horizontally. The button-attached sewing machine according to claim 6, wherein the sewing machine is a means for folding the fabric end portion to the side opposite to the front button side.   The root winding sewing switching mechanism moves the sewing thread holder and the front button holder upward from the mounting plate to the upper position of the mounting plate and reverses them, and then from the upper position of the mounting plate to the upper position of the mounting plate. 6. The buttoned sewing machine according to claim 5, wherein the sewing machine is configured to move downward.   The cloth edge folding means displays the cloth edge hanging downward from the button sewing position before the table button holder and sewing thread holder after reversing are moved downward from the upper position of the placing board onto the placing board. 9. The button-attached sewing machine according to claim 8, wherein the button-attached sewing machine is a means that is pushed into the opposite side of the button side and folded.   The thread cutting tool can be moved forward and backward linearly along a position near the back surface of the front button holder, moved forward before the root winding first needle operation, and moved backward and forward after the root winding second needle operation. The button-attached sewing machine according to any one of claims 5 to 9, wherein the sewing machine is configured to pull and cut the thread.

Images