KR20080000510A - Button sewing machine - Google Patents

Abstract

A button sewing machine is provided to simplify the entire structure, thereby achieving a decreased size, a reduced weight, and a low-cost, by using a movable-stationary switch unit, and to improve an operation efficiency by sewing button automatically and continuously. A cloth holder(10) is inserted into bifold cloth to hold the cloth. A button holder(5) holds a button while a needle penetrates a hole of the button. A movable table(22) moves the button holder frontward, backward, rightward, and leftward. A movable-stationary switch unit is switched between a first state, where the cloth holder is in a stationary state to stop the rightward and backward movement of the cloth holder, and a second state, where the cloth holder is not in the stationary state to move the cloth holder and the button holder frontward, backward, rightward, and leftward, during a button sewing operation. The movable-stationary switch unit includes a position adjustment unit, wherein the position adjustment unit adjusts the stationary position of the cloth holder in right and left directions within a predetermined range when the movable-stationary switch unit is in the fist state.

Description

Button month sewing machine {BUTTON SEWING MACHINE}

1 is a schematic perspective view of the main portion of a button-tail sewing machine according to the present invention.

2 is an exploded perspective view of the main portion.

3 is an exploded enlarged perspective view of the main portion illustrating the configuration of the position adjusting mechanism assembled to the movable-floating switching mechanism of the cloth holder.

Fig. 4 is an enlarged perspective view of the main portion showing the state where the cloth holder is released from position fixing.

It is an enlarged perspective view of the main part which showed the state which fixed the cloth holder.

FIG. 6 is an enlarged side view of a main portion showing a state corresponding to FIG. 4. FIG.

FIG. 7 is an enlarged side view of a main portion showing a state corresponding to FIG. 5. FIG.

It is a top view of the principal part for demonstrating the button-dal sewing state.

It is a front view of the principal part for demonstrating a button-dal sewing state.

10 is an explanatory view of a root winding sewing position.

11 is a perspective view of the main portion in which the button month has been shown.

12 is a front view of a main portion for explaining a button month sewing state by a conventional general button month sewing machine.

It is explanatory drawing of the root winding sewing position after button month sewing shown in FIG.

It is a front view of the principal part explaining the state after completion | finish of root winding shown in FIG.

The present invention relates to a button month sewing machine used in sewing a button on various sewing products, such as a front button of a lady's dress or a vest, a button for a pocket, a button for a back pocket of a pants, and the like. Specifically, the button month is configured to allow the button thread to be sewn to the fabric by passing the sewing thread through each hole of the button by the vertical reciprocating motion of the needle interlocked with the sewing machine spindle.

As described in Japanese Patent Application Laid-open No. Hei 7-49076, a button-button sewing machine of this kind is basically a needle plate having a needle drop hole through which a needle moves up and down, and a cloth folded twice. A cloth holder for inserting and holding the cloth, a button holder for holding the button in a posture with a needle penetrating the hole, and each hole of the button held therein dropping the needle of the needle plate. The movable table which drives to move in the two-dimensional direction (front-back, left-right direction) orthogonal to each other in a horizontal plane is provided so that it may match with a hole. In the conventional general button month sewing machine having such a basic configuration, when the button month is sewn, each hole of the button held in the button holder through the movable table and the cloth holder and the button holder is connected to the needle drop hole of the needle plate. In order to coincide with each other, the button moon is sewn to the fabric by driving the movement in one body in the front, rear, and left and right directions perpendicular to each other in the horizontal plane.

However, since the relative positional relationship between the button and the cloth at the time of sewing the button month is always the same in the above-described conventional button sewing machine, as shown in FIG. 12, the hole pitch d1 on the left and right sides of the button 50 is shown. ) And the sewing pitch d2 to the cloth 51 are the same, so that the left and right button lugs are so-called parallel stitches in which the threads LN and RN are parallel to each other. In the case of such parallel stitching, when a very soft cloth is to be sewn, the fabric part between the left and right buttoned yarns LN and RN is weeping or sewing wrinkles are generated, resulting in poor texture.

In particular, after sewing the button moon, the left and right button moons between the cloth 51 and the button 50 in the order shown by A to N with O of FIG. 13 as the first needle stitches of the threads LN and RN. Rooting thread when the needles are alternately dropped on both sides to make rooting sewing (which may be hand sewing or machine sewing) to reinforce the buttons LN and RN by the rooting thread BN. As shown in Fig. 14, the fastening force of (BN) causes the fabric portions between the left and right buttoned yarns LN and RN to be pulled from the left and right to weep or large sewing folds x to generate sewing quality. There is a problem that causes a decrease.

As the button month sewing machine is intended to improve the quality of the sewing by eliminating the weeping or sewing wrinkles, etc. between the left and right button moon, the button holder, as described in the prior art Patent No. 2711024 The front and rear, right and left orthogonal to the first movable table and the fabric holder in the horizontal and horizontal directions so as to be aligned with each other in the horizontal plane so as to coincide with the needle drop hole of the needle plate, the holes held therein 2nd movable table which drive-drives in a direction, respectively is provided separately, and the movement pitch of these 1st and 2nd movable table is independently controllable, and a button is pushed through a 1st movable table at the time of button sewing. The cloth is moved left and right by an amount corresponding to the left and right hole pitches (d1 in FIG. 12), and the cloth is cut through the second movable table. By moving the left and right by an amount smaller than the right and left hole pitch (d2 <d1 in Fig. 12), the left and right button moons are threaded into a V-shape to eliminate the occurrence of sewing wrinkles, etc. It has been suggested that it be configured.

According to the conventional button moon sewing machine proposed in the above Patent No. 2711024, there is a problem that the conventional general button moon disclosed in Japanese Patent Laid-Open No. 7-49076 and the like has a sewing machine, that is, a button moon to a soft cloth. During sewing, the left and right button moons are interwoven with thread between the yarns or the fabric wrinkles are deteriorated due to the occurrence of sewing wrinkles, especially when the roots are sewn. The part can be pulled from the left and right to cry, and large sewing wrinkles can be generated on the fabric, thereby reducing the sewing quality.

On the other hand, in order to be able to improve the sewing quality in this way, the front and rear, left and right directions in which the first movable table and the cloth holder which drive the button holders in the front and rear or right and left directions orthogonal to each other in the horizontal plane are orthogonal to each other in the horizontal plane. In addition to separately installing the second movable table for driving and moving, the control function capable of independently controlling the first and second movable tables so that the left and right movement amounts of the first and second movable tables are different from each other is provided. It is also necessary that the button moon is very complicated structure of the entire sewing machine, and the size and weight of the sewing machine is inevitably increased. In addition, there is a problem that the vibration and noise when the two movable tables are driven to move is also large, which is undesirable in terms of working environment.

The present invention has been made in view of the above-described conditions, and the overall structure is simple, and the size, weight, and cost of the device can be reduced, and the occurrence of sewing wrinkles and the like can be prevented even when a soft cloth is used for sewing. It is an object of the present invention to provide a button sewing machine which can perform button sewing with high sewing quality irrespective of the type or thickness of the thread.

In order to achieve the above object, the button- month sewing machine according to the present invention includes a needle for sewing the button-month sewing on the cloth by passing the sewing thread through each hole of the button by the vertical reciprocating motion interlocked with the sewing machine spindle; A needle plate having a needle drop hole for moving up and down, a cloth holder inserted in the middle of the double-folded cloth to hold the cloth, and a button moon for penetrating the button through the hole in the posture. A button holder, a movable table for driving the button holder in the front, rear, left and right directions orthogonal to each other in a horizontal plane so that each hole of the button held therein coincides with the needle dropping hole of the needle plate; The cloth holder is fixed to a predetermined position to stop the first and second movements of the cloth holder, and the cloth holder is fixed and held. And a button moon having a movable-floating switching mechanism of the cloth holder which can be switched to a second state for moving the cloth holder together with the button holder in the front-rear, left-right direction, and the movable-floating switching mechanism is movable. And a positioning mechanism capable of adjusting the fixed holding position of the cloth holder in the horizontal direction in a predetermined range when the floating switching mechanism is in the first state.

According to the present invention having the above-described feature configuration, when the button month is sewn, the movable-floating switching mechanism of the cloth holder is fixed and held at a predetermined position so that the movement of the cloth holder in the left and right directions is stopped. By moving only the button holders in the left and right directions by the amount corresponding to the right and left hole pitches, the button holders on the left and right sides can be threaded in a V shape instead of parallel to each other, and soft cloth Even in the case of sewing, the deterioration of the texture due to the occurrence of crushing of the fabric portion between the yarns, sewing wrinkles, or the like can be prevented. In addition, when the movable-floating switching mechanism is in the first state described above, the button moon using the fixed holding position in the left and right directions of the cloth holder can be adjusted according to the type and thickness of the thread, and by the adjustment Both button buttons on the left and right sides can concentrate on one point of the fabric, thereby avoiding the problem that the thread breaks or overlaps, causing the fabric to bulge locally. Therefore, button sewing with high sewing quality can always be performed irrespective of the softness of the fabric to be sewn and the type and thickness of the thread.

In addition, it is possible to switch between a first state in which the cloth holder is fixedly held at a predetermined position and a second state in which the position is released. In this first state, the fixing holding position of the cloth holder is adjustable within a predetermined range in the horizontal direction. In addition to installing the movable-floating switching mechanism of the fabric holder in which the positioning mechanism is assembled, two movable tables and two movable tables for driving the button holder and the cloth holder separately to achieve the V-shaped driving The conventional button moon disclosed in Japanese Patent No. 2711024, which has a control function for controlling independently, makes the overall structure simpler, smaller, lighter, and lower in cost than the sewing machine. The noise is also very low and the button moon can improve the working environment during sewing.

In addition, the button holder which switches the movable-float switching mechanism of a cloth holder, and puts a thread of right and left buttons in a V shape, and keeps this movable-floating switching mechanism movable, ie, a cloth holder and a button holder, said Conventionally parallel button according to the conventional movement of the same amount of drive movement in the front, rear, left and right directions perpendicular to each other in the horizontal plane so that each hole of the button held in the button holder through the movable table coincides with the needle drop hole of the needle plate. It is also possible to switch to the moon, so that one sewing machine can be used for a plurality of sewing buttons.

In the button month sewing machine according to the present invention, as the movable-float switching mechanism, as described in claim 2, the cloth holder is moved away from the needle plate and in a position to keep the fabric in double folding and double folding. Pivotally supported freely around a horizontal axis and a coaxial center for slidably holding the base portion of the cloth holder rocking arm for driving rocking over a position for conveying and fixing the retained fabric onto the needle plate and fixing it, An approximately L-shaped crank link having an engaging click portion at both ends thereof, and an engaging click portion at both ends when the crank link is swung around the shaft center with the cloth holder positioned at a predetermined position with respect to the needle plate. Two engaging members provided on the movable table side and the fixed portion side to be engaged; And a first actuator configured to oscillate the crank link so that the engaging click portions at both ends thereof are alternatively engaged with the two engaged members, and the position adjusting mechanism assembled to the movable-floating switching mechanism is in the first state. The engagement member holder fixed to the side of the fixing member so as to slide freely the one engagement member to which the engagement click portion of the crank link is engaged within a predetermined range in the horizontal direction in the one direction, and the engagement member holder with respect to the engagement member holder. It is preferable that it is comprised by the 2nd actuator which drives the sliding member of the to-be-engaged member to a left-right direction.

By using the movable-floating switching mechanism having such a configuration, the overall structure can be reduced in size, weight, and cost, and the timing for switching the movable-floating is programmed in advance in the first actuator, and the type and thickness of the thread in the second actuator. In response to this, by programming the sliding amount and the sliding timing of one of the engagement members in the left and right directions in advance, it is possible to reliably and continuously perform the high sewing quality button attachment as described above. Promotion can be achieved.

In addition, as described in claim 3, in the movable-floating switching mechanism, one of the blood by the second actuator is provided by providing a stopper capable of adjusting the sliding range in the left and right directions of the one engaging member in the engaged member holder. By adjusting the sliding range in the left and right direction of the engaging member, the V-shaped buttons on the left and right sides of the button avoid the problem of the thread breaking due to the concentration of all the threads on the cloth or the local convexity of the cloth due to the overlapping of the threads. The shape can be secured.

In addition, the present invention, as described in claim 4, when the movable-floating switching mechanism is provided with a sewing machine for sewing the root wound by alternately dropping needles on both sides of the thread alternately between the cloth and the button Not only can the moon and the root of the button reinforce the thread in succession, but also the tightening force of the root winding thread eliminates the occurrence of sewing wrinkles that occur in the fabric between the left and right button moons. The improvement of can be reliably achieved.

In addition, the present invention is not limited to that the movable-floating switching mechanism is provided with a root winding sewing machine as described in claim 4, and the button moon is provided with a dedicated sewing machine as described in claim 5. It may be present.

Other effects will be apparent from the description of the following examples.

1 is a schematic perspective view of the main part of a button-down sewing machine according to the present invention, Figure 2 is an exploded perspective view of the main part, in Figures 1 and 2, 1 is a needle, the sewing machine installed in the sewing machine arm (2) It reciprocates up and down in conjunction with the main shaft (not shown). 3 is a cloth guide, in which the needle plate 4 (see FIGS. 6 and 7) having a needle drop hole through which the needle 1 passes up and down is fixed to the lower side of the cloth guide 3. It is. 5 is a button holder, which is configured to elastically retain the four-hole button 6 (see FIGS. 8 and 11) from both sides of the periphery thereof, and is connected to the connecting rods 8 and 9 by extension and contraction of the cylinder 7. Through the button moon sewing posture and rooting sewing posture rotation is freely configured.

10 is a cloth holder, which doubles the fabric 11 (see FIG. 6) to sew the button 6 and is inserted in the middle of the folded fabric 11 to hold the cloth 11 fixed. It is. The cloth holder 10 extends around the shaft center of the horizontal shaft 15 through the connecting rods 13 and 14, the horizontal shaft 15, the connecting arm 16 and the connecting shaft 17 by the contracting extension of the cylinder 12. It is rotatable and is fixed to the cloth holder rocking arm 18 held on the horizontal axis 15 so as to be slidable in the axial direction thereof through an attachment part 19, and by extension and contraction of the cylinder 12. A position where the cloth holder 10 is kept away from the needle plate 4 by rotating the cloth holder 10 around the axis of the horizontal axis 15 to hold the cloth 11 in a double fold, and the retained double layer The folded fabric 11 is transferred to the needle plate 4 and placed on the upper surface of the cloth guide 3 so as to be switchable over a fixed position.

In Fig. 1, 20 is a cloth press, and the cloth press 20 is a cylinder 21 on the upper surface of the double-folded cloth 11 which is placed on the cloth guide 3 by the cloth holder 10. It is to prevent twisting of this cloth 11 by contacting obliquely upward through ().

22 is a movable table, and this movable table 22 is comprised so that drive movement is possible in the front-back Y-Y direction and the left-right X-X direction orthogonal to each other in a horizontal plane through two stepping motors and a timing belt which are not shown in figure. A pair of left and right cloth holder arms 23 and 24 are fixed to the left and right sides of the movable table 22, and the attachment pieces 25 are interposed between the middle portions of the left and right pair of cloth holder arms 23 and 24. The cloth guide 3 is fixedly connected through 26, and the horizontal axis 15 is hypothesized and fixed between the lower ends of the left and right pair of cloth holder arms 23 and 24.

27 is a button holder arm, the button holder arm 27 is supported by the movable table 22 via an arm joint 28, so that the button holder arm 27 and the button holder 5 are supported by the movable table. Through 22, it is comprised so that driving movement is integrally possible in the front-back YY direction and the left-right XX direction. 29 is a cloth holder adjustment plate, which is provided along the outside of the cloth holder arm 23 on the left side, and its lower end is freely attached to the circumference of the horizontal axis 15. 30 is fixed to the connecting table 14 as an axial arm stopper, and is bent to be able to abut on the upper side of the middle portion of the cloth holder adjusting plate 29.

In the base portion of the cloth holder rocking arm 18, as shown in Figs. 2 and 4 to 7, a cutout groove 31 is formed, and in the cutout groove 31, engaging click portions 32a are engaged at both ends. , The bent portion of the approximately L-shaped crank link 32 having the shape 32b is fitted in, and pivotally supported freely around the axis of the horizontal axis 15. In addition, between the left and right pair of cloth holder arms 23 and 24, another horizontal axis 33 is fixed to be in parallel with the horizontal axis 15, and is located in the middle of the horizontal axis 33 and behind it. The crank link is formed in the sewing machine frame 34 when the crank link 32 is swung around the axis of the horizontal axis 15 with the cloth holder 10 positioned at a predetermined position with respect to the needle plate 4. (32) The pair of left and right collar members 35a and the two forked positioning members 36a are formed such that the engaging click portions 32a and 32b at both ends form the engaging portions 35 and 36 to be alternatively engaged. Attached.

In addition, the cloth holder rocking arm 18 is fixedly held by a cylinder (first actuator) 38 which is operated up and down through a cylinder mounting table 37, and the tip of the operating rod 38a of the cylinder 38 is fixed. The crank link 32 is pivotally supported via a connecting piece 39 and a connecting pin 40. In addition, the engaging portion 36 is penetrated in the front-rear direction to allow movement in the front-rear Y-Y direction of the engaging click portion 32b engaged therewith.

According to each of the above structures, the crank link 32 is swung around the axis of the horizontal axis 15 in accordance with the expansion and contraction operation of the cylinder 38, and the engagement click portion 32b of one of the crank links 32 is bifurcated. By engaging the genuine engaging portion 36, as shown in Figs. 5 and 7, the cloth holder 10 is held in a predetermined position to stop only the left and right movement of the cloth holder 10 in the first state. And engagement of the engagement click portion 32a on the other side of the crank link 32 with the engagement portion 35 of the pair of left and right collar members 35a, as shown in FIGS. 4 and 6. The movable-floating of the cloth holder which can be switched to the second state in which the position holder 10 is released and the cloth holder 10 is moved to the front, rear, left and right directions together with the button holder 5 through the movable table 22. The switching mechanism is configured.

In the movable-floating switching mechanism of the cloth holder, the fixed holding position of the cloth holder 10 can be adjusted within a predetermined range in the left and right directions when the mechanism is in the first state shown in FIGS. 5 and 7. Position adjustment mechanism 41 is assembled. This position adjustment mechanism 41 has a bipartite engagement member 36a which forms one engagement portion 36a to which one engagement click portion 32b of the crank link 32 is engaged in the left and right direction. It slides and fixes in a fixed range, and is comprised as follows.

3 is an exploded enlarged perspective view of the main portion explaining the structure of the position adjustment mechanism 41, and the downward opening U-shaped engaged member holder 43 fixed to the lower surface of the sewing machine frame 34 through the fixing screw 42. As shown in FIG. The two pins 44 extend across and fixed to each other across the left and right side plates, and the holes 45 formed in the left and right opposing plate portions of the engaging member 36a are inserted through the two pins 44. In this way, the engagement member 36a is freely supported in the left and right direction within a predetermined range defined between the left and right side plates of the engagement member holder 43. On the outside of either of the left and right sides of the engaged member holder 43, an air cylinder (second actuator) 47 held by the support 48 fixed to the lower surface of the sewing machine frame 34 via a fixing screw 46 is provided. It arrange | positions, The said extension | stretching operation rod 47a of this air cylinder 47 is connected and fixed to the said engagement member 36a through the hole 43a formed in the one side plate of the engagement member holder 43, and the said In accordance with the expansion and contraction operation of the air cylinder 47, the engagement member 36a and the engagement portion 36 are configured to be drive-slidable within the predetermined range in the horizontal direction.

In addition, a screw hole 49 is formed in the side plate on the other side of the engaging member holder 43, and a bolt stopper 50 whose tip is in contact with the outer surface of the engaging member 36a. Is screwed in, and the bolt-shaped stopper 50 is withdrawn from the engaged member holder 43 and fixed through the nut 51 so that the sliding range in the left and right direction of the engaged member 36a can be adjusted. Consists of.

In addition, between the left and right pairs of cloth holder arms 23 and 24, a shaft 52 parallel to this in addition to the horizontal axis 15 is stretched and fixed, and the posture is maintained on the two axes 15 and 52. A cloth press fitting stand 53 is provided, and the cylinder 21 for cloth press fittings 20 is fixedly held through an attachment plate 54 at the upper end of the cloth press fitting stand 53.

Next, a button month sewing operation by the button month sewing machine configured as described above will be described.

First, the four-hole button 6 is elastically held by the button holder 5 by operation of a cylinder (not shown) or by operation of a manual lever, and then the button holder 5 is extended by the extension of the cylinder 7. It is set as a button posture sewing posture, fold the cloth 11 in the cloth holder (10).

Subsequently, the double-folded cloth 11 held by the cloth holder 10 is held by pressing the pedal (not shown) to extend the cylinder 12 and rotating the cloth holder 10 around the axis of the horizontal axis 15. Is conveyed onto the needle plate 4 and placed on the upper surface of the cloth guide 3 so as to be brought into contact with the upper surface of the cloth 11 in which the cloth presses 20 are folded twice by the extension of the cylinder 21. To prevent the fabric 11 from twisting. At this time, the crank link 32 is oscillated around the axis of the horizontal axis 15 by the extension operation of the cylinder 38, and one engagement click portion 32b of the crank link 32 is engaged. 5 and 7, the cloth holder 10 is fixedly held at a predetermined position of the sewing machine frame 34 so that the movement of the cloth holder 10 in the left and right XX directions is stopped. In the first state.

In this first state, the sewing machine is operated to move the button holder 5 and the cloth holder 10 through the movable table 22 to the pitch d2 of the right and rear holes 6Rf and 6Rr of the four holes of the button 6. By reciprocating in the front-rear YY direction by a distance corresponding to), as shown in FIG. Button month sewing is done.

Subsequently, the button month for the left front and rear holes 6Lf and 6Lr among the four holes of the button 6 is shifted to sewing. At this time, the engagement click portion 32b of one of the crank links 32 is, 5 and 7, the mesh holder 10 is held in engagement with the engaged portion 36, and thus the cloth holder 10 is fixedly held at a predetermined position of the sewing machine frame 34 so that the cloth holder 10 is held. The movement in the right and left XX directions remains stationary.

In this state, the sewing machine is operated to move only the button holder 5 through the movable table 22 to the left and right XX directions by a distance corresponding to the left and right hole pitch d1 among the four holes of the button 6, and then start the sewing machine. The button holder 5 and the cloth holder 11 are reciprocated in the front-rear YY direction by a distance corresponding to the pitch d2 of the left front and rear holes 6Lf and 6Lr via the table 22, thereby as shown in FIG. As described above, the button month sewing is performed on the front and rear holes 6Lf and 6Lr on the left side of the button 6 at a predetermined number of times of impregnation by the button month thread LN.

As described above, only the button holder 5 is left and right in the first state in which the cloth holder 10 is fixed at a predetermined position and the movement of the cloth holder 10 in the left and right XX directions is stopped when the button moon is sewn. Left and right button moons (RN, LN) by moving in the left and right XX directions by the amount corresponding to the hole pitch (d1), and then driving the two front and rear holes (6Rf, 6Rr, 6Lf, and 6Lr) in turn. 9, the cloth 11 can be embedded in a V-shape as shown in FIG. 9, thereby deteriorating the texture due to the occurrence of sewing wrinkles, even when the soft cloth 11 is to be sewn. A high-quality button moon can be sewed without letting you do it.

When the button moon in the first state is sewn, the cylinder 47 of the position adjusting mechanism 41 is stretched and operated according to the type and thickness of the button moon seals RN and LN. The two interlocking engagement members 36a forming one engagement portion 36 to which one engagement click portion 32b of (32) is engaged are slid left and right along the two pins 44 to be avoided. By adjusting the position of the engaging portion 36, and thus the fixed holding position in the left and right directions of the cloth holder 10, the button-left yarns LN and RN on both sides are not concentrated at one point of the cloth 11. As shown in Fig. 9, the fabric 11 is dropped into portions of the fabric 11 slightly separated from each other, and is driven into a substantially V-shape in a state where a gap d of about 3.5 mm is secured between the ends of both chambers LN and RN. It is possible. Therefore, the button-ends of the yarns LN and RN are driven to concentrate on one point of the cloth 11, and as a result, thread breakage occurs or the threads overlap each other, so that the portion of the cloth 11 is locally attached. It is possible to avoid the occurrence of convex problems and to perform high quality button delivery regardless of the type or thickness of the button month yarns RN and LN.

Further, in the positioning mechanism 41, the bolted stopper 50 is pulled out with respect to the engaged member holder 43 and fixed through the nut 51 to engage the engaged member 36a and the engaged portion 36. By controlling the sliding range in the left and right directions of the c), the size of the gap d between the ends of the two yarns LN and RN is also arbitrarily adjusted, so that the button month is described regardless of the type or thickness of the yarns RN and LN. While avoiding the occurrence of such a problem, it is possible to secure a button month having a good texture when the soft cloth is to be sewn by the V-shaped stitching.

After the above button month sewing is completed, the cylinder 7 is contracted, the button holder 5 is rotated through the connecting rods 8 and 9 to switch to the root winding sewing position, and by the contracting operation of the cylinder 38 The crank link 32 is oscillated around the axis center of the horizontal axis 15 so that one engagement click portion 32a of the crank link 32 is engaged with the engaged portion 35, and accordingly FIGS. 4 and 6. As shown in the drawing, the cloth holder 10 is switched to the second state in which the cloth holder 10 is integrally movable in the front-back YY direction and the left-right XX direction together with the button holder 5 via the movable table 22.

In this second state, the movable table 22 is moved to the root winding sewing position O of the first needle stitch shown in FIG. 10 in accordance with the operation signal output from the microcomputer unit, not shown, and the needle 1 is subsequently operated. The button holder 5 and the cloth holder 10 reciprocate at a predetermined pitch in the front-back YY direction and the left-right XX direction through the movable table 22 in synchronization with the vertical reciprocation of Left and right button moons between the cloth 11 and the button 6 alternately drop the needles 1 on both sides of the threads RN and LN in the order shown, and the left and right buttons by the rooting thread BN. Rooting sewing is performed in which the moon reinforces the yarns RN and LN.

Then, the left and right buttoned yarns RN and LN reinforced by the rooting sewing are roughly V-shaped with respect to the cloth 11, so that the left and right buttoned yarns are threaded between the yarns RN and LN. 11) does not exist, there is no occurrence of sewing wrinkles due to the pulling of the cloth 11 portion of the site where the button 6 is attached even if the rooting thread BN is tightened firmly, as shown in FIG. As described above, a button month having high sewing quality can be sewn.

In addition, in the said embodiment, the button month thread RN for the right hole 6Rf, 6Rr of the 4-hole button 6 cloths the button month thread LN for the hole 6Lf, 6Lr of the left side. Although the operation | movement at the time of putting into V shape with respect to (11) was demonstrated, even the same 4-hole button 6 makes one engagement click part 32a of the crank link 32 mesh with the to-be-engaged part 35. FIG. 4 and 6, the cloth holder 10 is always movable with the button holder 5 through the movable table 22 in the front-back YY direction and the left-right XX direction as shown in FIG. 4 and FIG. By inserting 6Rf and 6Rr and holes 6Lf and 6Lr on the left side, it is also possible to use the left and right button moons to make parallel stitches as shown in FIG.

In the case where the two-hole button is to be sewn, the two holes are set in the front-rear direction to sew, and as shown in FIGS. 4 and 6, one engagement click portion 32a of the crank link 32 is sewn. ) Is engaged with the engaged portion 35 so that the cloth holder 10 can always move with the button holder 5 through the movable table 22 in the front-back YY direction and the left-right XX direction, or the crank link 32. The two-hole button can be used to engage the engagement clicking portion 32b on the other side of the engagement portion with the engaged portion 36 so that the cloth holder 10 can be moved together with the button holder 5 in the forward and backward YY directions. It is possible to sew on (11).

In addition, in the above embodiment, it has been described that the button moon can be continuously sewing and root winding sewing with a single sewing machine, but can also be applied to the button moon dedicated sewing machine. Also in this case, the button month for the soft cloth can prevent the occurrence of sewing wrinkles and the like, thereby achieving an effect of improving the sewing quality.

Furthermore, in the present invention, the movable-floating switching mechanism of the cloth holder is not limited to the one described in detail in the above embodiment, that is, the cloth holder 10 is fixedly held at a predetermined position and the cloth holder ( 10) and the state in which the movement of the cloth holder 10 is stopped and the cloth holder 10 can be switched to the state of moving the cloth holder 10 forward, backward, left and right together with the button holder 5. Any configuration may be sufficient.

Furthermore, the position adjusting mechanism 41 which is assembled to the movable-floating switching mechanism of the cloth holder is not limited to that having the configuration described in detail in the above embodiment, that is, the engagement to form the engaged portion 36. Any configuration may be used as long as the member 36a can be positioned in the horizontal direction. In addition, it is not limited to the sewing machine frame 34 which hold | maintains the to-be-engaged member holder 43 of this position adjustment mechanism 41, Any may be sufficient as the fixing part attached to a sewing machine.

According to the present invention having the above-described feature configuration, when the button month is sewn, the movable-floating switching mechanism of the cloth holder is fixed and held at a predetermined position so that the movement of the cloth holder in the left and right directions is stopped. By moving only the button holders in the left and right directions by the amount corresponding to the right and left hole pitches, the button holders on the left and right sides can be threaded in a V shape instead of parallel to each other, and soft cloth Even in the case of sewing, the deterioration of the texture due to the occurrence of crushing of the fabric portion between the yarns, sewing wrinkles, or the like can be prevented. In addition, when the movable-floating switching mechanism is in the first state described above, the button moon using the fixed holding position in the left and right directions of the cloth holder can be adjusted according to the type and thickness of the thread, and by the adjustment Both button buttons on the left and right sides can concentrate on one point of the fabric, thereby avoiding the problem that the thread breaks or overlaps, causing the fabric to bulge locally. Therefore, button sewing with high sewing quality can always be performed irrespective of the softness of the fabric to be sewn and the type and thickness of the thread.

In addition, it is possible to switch between a first state in which the cloth holder is fixedly held at a predetermined position and a second state in which the position is released. In this first state, the fixing holding position of the cloth holder is adjustable within a predetermined range in the horizontal direction. In addition to installing the movable-floating switching mechanism of the fabric holder in which the positioning mechanism is assembled, two movable tables and two movable tables for driving the button holder and the cloth holder separately to achieve the V-shaped driving The conventional button moon disclosed in Japanese Patent No. 2711024, which is equipped with a control function for controlling independently, can simplify the overall structure of the sewing machine compared to the sewing machine, thereby making it possible to reduce the size of the sewing machine, to reduce the weight, and to reduce the cost. The noise is also very low and the button moon can improve the working environment during sewing.

In addition, the button holder which switches the movable-floating switching mechanism of the cloth holder and puts the thread of right and left buttons in a V shape, and the movable-floating switching mechanism is operated, that is, the cloth holder and the button holder are operated as mentioned above. The conventional buttoning of the parallelism according to the conventional drive of the same amount of drive movement in the front, rear, left and right directions perpendicular to each other in the horizontal plane so that each hole of the button held in the button holder through the table coincides with the needle drop hole of the needle plate. It is also possible to switch to use, thereby achieving the effect that one sewing machine can be used for a plurality of sewing buttons.

In the button month sewing machine according to the present invention, as the movable-float switching mechanism, as described in claim 2, the cloth holder is moved away from the needle plate and in a position to keep the fabric in double folding and double folding. Pivotally freely pivoted around a horizontal axis and a coaxial center for slidably retaining the base portion of the cloth holder rocking arm for driving rocking over a position to convey and hold the retained fabric onto the needle plate to fix it; An approximately L-shaped crank link having an engaging click portion at both ends thereof, and an engaging click portion at both ends when the crank link is swung around the shaft center with the cloth holder positioned at a predetermined position with respect to the needle plate. Two engaging members provided on the movable table side and the fixed portion side to be engaged; And a first actuator configured to oscillate the crank link so that the engaging click portions at both ends thereof are alternatively engaged with the two engaged members, and the position adjusting mechanism assembled to the movable-floating switching mechanism is in the first state. The engagement member holder fixed to the side of the fixing member so as to slide freely the one engagement member to which the engagement click portion of the crank link is engaged within a predetermined range in the horizontal direction in the one direction, and the engagement member holder with respect to the engagement member holder. It is preferable that it is comprised by the 2nd actuator which drives the sliding member of the to-be-engaged member to a left-right direction.

By using the movable-floating switching mechanism having such a configuration, it is possible to realize miniaturization, light weight, and low cost of the entire structure, and to program the switching timing of the movable-floating in advance to the first actuator, and the type and thickness of the yarn to the second actuator. In response to this, by programming the sliding amount and the sliding timing of one of the engagement members in the left and right directions in advance, it is possible to reliably and continuously perform the high sewing quality button attachment as described above. Promotion can be achieved.

In addition, as described in claim 3, in the movable-floating switching mechanism, one of the blood by one of the second actuators is provided in the engaged member holder by providing a stopper capable of adjusting the sliding range in the left and right directions of the one engaged member. By adjusting the sliding range in the left and right direction of the engaging member, the V-shaped buttons on the left and right sides of the button avoid the problem of the thread breaking due to the concentration of all the threads on the cloth or the local convexity of the cloth due to the overlapping of the threads. The shape can be secured.

In addition, the present invention, as described in claim 4, when the movable-floating switching mechanism is provided with a sewing machine for sewing the root wound by alternately dropping needles on both sides of the thread alternately between the cloth and the button Not only can the moon and the root of the button reinforce the thread in succession, but also the tightening force of the root winding thread eliminates the occurrence of sewing wrinkles that occur in the fabric between the left and right button moons. The improvement of can be reliably achieved.

In addition, the present invention is not limited to that the movable-floating switching mechanism is provided with a root winding sewing machine as described in claim 4, and the button moon is provided with a dedicated sewing machine as described in claim 5. It may be present.

Claims (6)

A needle plate having a needle thread through which the sewing thread is passed through each hole of the button by sewing up and down the reciprocating motion of the sewing machine spindle, and the button is sewn on the fabric, and a needle plate having a needle drop hole through which the needle moves up and down. The cloth holder which is inserted in the middle of a cloth to hold this cloth, the button holder which keeps the said button in the posture which a needle penetrates into the hole, and each hole of the button which kept this button holder in this A movable table which is driven to move back and forth or right and left orthogonal to each other in a horizontal plane so as to coincide with the needle drop hole of the needle plate, and when the button is sewn, the cloth holder is fixedly held at a predetermined position to move left and right in the cloth holder The first state to stop the operation and the fixed holding of the cloth holder to release the cloth holder together with the button holder in the front, rear, left and right directions. The button sewing machine as months and a floating switching mechanism, - the operation of the cloth holder can be switched to the second state such that The movable-floating switching mechanism is incorporated with a position adjusting mechanism capable of adjusting the fixed holding position of the cloth holder in the horizontal direction in a predetermined range when the movable-floating switching mechanism is in the first state. Button month sewing machine. 2. The movable-floating switching mechanism according to claim 1, wherein the movable-floating switching mechanism transports and places the cloth held in the double folding on the needle plate and the position where the cloth holder is separated from the needle plate to hold the cloth in the double folding. An approximately L-shaped crank pivotally supported freely around a horizontal axis and a coaxial center for holding the base portion of the cloth holder rocking arm to slidably move in the left and right directions for fixing the drive position over the fixed position, and having engaging portions at both ends thereof. A link and two provided on the movable table side and the fixing portion side such that the engaging click portions at both ends are alternatively engaged when the crank link is swung around the shaft center with the cloth holder positioned at a predetermined position with respect to the needle plate. Two engagement members and an engaging click portion at both ends of the crank link The position adjusting mechanism, which is composed of a first actuator which is pivotally driven to be engaged with two engaged members, and which is assembled to the movable-floating switching mechanism, has one engaging click portion of the crank link in the first state. Driven sliding member to be engaged with the engaged member holder fixed to the side of the engaging portion and the engaged member in the horizontal direction so as to freely support the engaged member on the side to be engaged within a predetermined range in the horizontal direction. Button sewing machine, characterized in that consisting of a second actuator to. The button month sewing machine according to claim 2, wherein the engaging member holder is provided with a stopper capable of adjusting a sliding range in the left and right directions of the one engaging member. The button according to claim 1 or 2, wherein the movable-float switching mechanism is provided with a sewing machine for sewing up the roots by alternately dropping the needles on both sides of the thread alternately between the cloth and the buttons. Moon sewing machine. The button month sewing machine according to claim 1 or 2, wherein the movable-floating switching mechanism is provided with a button month dedicated sewing machine. 3. The first actuator according to claim 2, wherein a timing for switching the movable-floating of the cloth holder by an alternative engagement with the two engaged portions of the crank link is preprogrammed, and the second actuator has a pre-programmed timing. A button month sewing machine characterized in that the sliding amount and the sliding timing of the engagement member in the left and right directions are programmed in advance.

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