JP4935179B2 - Sewing machine with buttons - Google Patents

Description

  The present invention relates to a button sewing machine used when sewing buttons on various sewing products such as a men's / women's clothing upper garment, a vest front button, an inner pocket button, a pants pocket button, and the like. More specifically, the present invention relates to a button-attached sewing machine that performs sewing with a button on a cloth by passing a needle that reciprocates up and down in conjunction with the main shaft of the sewing machine through each hole of the button.

  This type of sewing machine with a button basically includes a needle plate having a needle drop hole through which a needle moves up and down, a cloth holder inserted between two folded cloths to hold the cloth, and a button. A button holder that holds a button attachment posture in which a needle penetrates the hole, and two-dimensional orthogonal to each other in a horizontal plane so that each hole of the button holding the button holder matches the needle drop hole of the needle plate And a movable table that is driven to move in the direction (front-rear / left-right direction). In a conventional general button-attached sewing machine having such a basic configuration, when sewing a button, the hole of the button held by the button holder is connected to the cloth holder and the button holder via the movable table. It is configured to be sewn with a button on the cloth by integrally driving and moving in the front and rear and right and left directions orthogonal to each other in the horizontal plane so as to match the needle drop hole of the plate (see, for example, Patent Document 1).

  However, in the conventional general button sewing machine described above, since the relative positional relationship between the button and the cloth is always the same during button sewing, as shown in FIG. That is, so-called parallel sewing is performed in which the sewing pitch d2 to the fabric 51 is equal and the left and right button attaching threads LN and RN are positioned in parallel. In the case of such parallel stitching, when a very soft fabric is to be sewn, the fabric portion between the left and right button attaching threads LN and RN rises and sewing wrinkles occur, resulting in poor texture.

  In particular, after sewing with buttons, the needles are alternately dropped on both sides of the left and right buttoning threads LN and RN between the fabric 51 and the button 50 as indicated by A to N with O in FIG. 12 as the first stitch. When performing root winding sewing that reinforces the buttoning threads LN, RN with the root winding thread BN (which may be hand-sewn or machine sewing), as shown in FIG. There is a problem that the cloth portion between the buttoning threads LN and RN is drawn from the left and right to generate a large sewing heel x, resulting in deterioration of the quality of the sewing product.

  As a button-attached sewing machine that eliminates the occurrence of such sewing wrinkles and improves the quality of the sewing product, conventionally, the button holder is held in a horizontal plane so that each hole of the button held by the button holder matches the needle drop hole of the needle plate. A first movable table for driving and moving in the front-rear and left-right directions orthogonal to each other and a second movable table for driving and moving the dough holder in the front-rear and left-right directions orthogonal to each other in a horizontal plane are provided separately. The movement pitch of the second movable table can be controlled independently, and when sewing with a button, the button is moved left and right through the first movable table by an amount corresponding to the left and right hole pitch, while the cloth is the second movable table. The left and right buttoning threads are sewn into a V shape by moving the button to the left and right by an amount smaller than the left and right hole pitch of the button, eliminating the occurrence of sewing wrinkles. Texture, which is configured to allow good button sewing sewing quality has been proposed (e.g., see Patent Document 2).

  Japanese Patent Publication No. 7-49076   Japanese Patent No. 2711024

  According to the conventional buttoned sewing machine proposed in Patent Document 2, the problem of the conventional buttoned sewing machine shown in Patent Document 1, that is, the cloth between the left and right buttoning threads when sewing a button on a soft cloth. Although it is possible to eliminate the problem that the texture is deteriorated due to swells and sewing wrinkles, especially when the root winding sewing is performed, large sewing wrinkles are generated on the fabric and the quality of the sewing product is deteriorated. Includes a first movable table for driving and moving the button holder in the front / rear / left / right directions orthogonal to each other in a horizontal plane and a second movable table for driving / moving the dough holder in the front / rear / left / right directions orthogonal to each other in the horizontal plane. Not only has to be provided separately, but also a controller that can be independently controlled to move the first and second movable tables by different amounts. A need also to have a button sewing machine overall structure is very complicated, and, size, and weight reduction, inevitably be much sewing cost is increased. In addition, there is a problem that vibration and noise when the two movable tables are driven and moved are large, which is not preferable from the viewpoint of the working environment.

  The present invention has been made in view of the above-described circumstances, and the overall structure is simple, and it is easy to reduce the size, weight, and cost. An object of the present invention is to provide a button-attached sewing machine that can perform button attachment with high sewing product quality without having to do so.

In order to achieve the above object, a button-attached sewing machine according to the present invention is a button-attached sewing machine that performs sewing with a button on a cloth by passing a needle that reciprocates up and down in conjunction with the main spindle of the machine through each hole of the button. A needle plate having a needle drop hole through which the needle passes up and down, a fabric holder inserted in the middle of the folded fabric and holding the fabric, and a buttoning posture in which the needle penetrates the button through the hole A button holder that holds the button holder, and a movable table that is driven and moved in the front-rear and left-right directions orthogonal to each other in a horizontal plane so that each hole of the button held by the button holder matches a needle drop hole of the needle plate , when button sewing sewing organism to release the position fixing state before Symbol dough holder for stopping horizontal movement of the stationary holding to dough holders the fabric holder to a predetermined position footing And a movable-immovable switching mechanism switchable dough holder and the state of moving in the longitudinal and lateral with the button holder and loaders,
The movable / non-moving switching mechanism includes a position where the cloth holder is moved away from the needle plate to hold the cloth in half and a position where the cloth held in half is transported and fixed on the needle plate. The base part of the fabric holder swinging arm for driving and swinging is pivotally supported about a horizontal axis coaxially with the horizontal axis for slidably holding in the left-right direction, and engaging claws at both ends thereof When the crank link is swung around the axis while the dough holder is positioned at a predetermined position with respect to the needle plate, the engaging claws at both ends are Two engaged portions provided on the movable table side and the sewing machine frame side so as to be alternatively engaged, and the engagement claw portions on both ends of the crank link are alternatively engaged. An actuator that swings and drives to engage It is characterized in that it is al configured.

  According to the present invention having the above-described characteristic configuration, when sewing with a button, the cloth holder is fixedly held at a predetermined position, and the movement of the cloth holder in the left-right direction is stopped. This is the case where the left and right buttoning threads can be sewn in a V shape by moving the left and right direction by an amount corresponding to However, it is possible to perform buttoning with a high quality of the sewing product without causing deterioration of the texture due to the occurrence of sewing wrinkles or the like. In addition, since it is only necessary to provide a cloth holder movable / non-moving switching mechanism for switching the cloth holder between a state in which the cloth holder is fixed and held in a predetermined position and a state in which the position is released, a button for achieving V-shaped sewing. Compared to the conventional buttoned sewing machine shown in Patent Document 2 provided with two movable tables for driving and moving the holder and the fabric holder separately and a control function for independently controlling the two movable tables, The overall structure is very simple, and the overall sewing machine can be reduced in size, weight and cost, and there is very little vibration and noise, making it possible to improve the work environment when sewing with buttons. .

In addition, by switching the movable / movable switching mechanism of the fabric holder and sewing the left and right button attaching threads in a V shape, the movable / immovable switching mechanism remains movable, that is, the fabric holder and the button holder are As usual by driving and moving the same amount integrally in the front and rear and left and right directions orthogonal to each other in the horizontal plane so that each hole of the button held in the button holder via the movable table matches the needle drop hole of the needle plate It is also possible to switch to the parallel sewing buttoning, and one sewing machine can be used for buttoning a plurality of sewing forms .

In particular, said the movable-immovable switching mechanism in button sewing machine according to the present invention, the position and the needle plate fabric held in folio to hold the fabric holder folded in two fabric away from said needle plate The base of the fabric holder swinging arm for driving and swinging to the position where it is transported upward and placed and fixed is pivotally supported around the horizontal axis and the coaxial axis so as to be slidable in the left-right direction. And a substantially L-shaped crank link having engaging claw portions at both ends thereof, and the crank link is swung around the axis while the fabric holder is positioned at a predetermined position with respect to the needle plate. Two engaged parts provided on the movable table side and the sewing machine frame side so that the engaging claws at both ends are selectively engaged when moved, and the crank link is engaged at both ends. Claw part is alternatively two engaged By using those composed of a actuator for driving swing to engage the miniaturization of the entire structure, light weight, it is possible to realize cost reduction, the switching timing of the pre-movable-immovable actuator program By doing so, it is possible to achieve an increase in work efficiency by automatically and continuously performing buttoning with high quality of the sewing product .

According to the present invention, in the sewing machine according to claim 2 , the movable / non-movable switching mechanism is configured to sew a root winding by alternately dropping needles on both sides of the button attaching thread between the cloth and the button. If equipped, not only can the buttoning and the root winding to reinforce the buttoning thread be performed continuously, but also the sewing that occurs in the fabric part between the left and right buttoning threads due to the tightening force of the root winding thread. It is possible to surely improve the quality of the sewing product without wrinkles.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a main part of a sewing machine with a button according to the present invention. FIG. 2 is an exploded perspective view of the main part. In FIGS. 1 and 2, 1 is a needle provided in a sewing machine arm 2. It reciprocates up and down in conjunction with a sewing machine spindle (not shown). Reference numeral 3 denotes a fabric guide. A needle plate 4 (see FIGS. 5 and 6) having a needle drop hole through which the needle 1 passes up and down is arranged and fixed in close contact with the fabric guide 3 below. . Reference numeral 5 denotes a button holder, which is configured to elastically hold the four-hole button 6 (see FIGS. 7 and 10) from both sides of the peripheral portion thereof. Via the button, it is configured to be able to rotate and switch between a buttoned sewing posture and a root winding sewing posture.

  A fabric holder 10 is formed so that the fabric 11 (see FIG. 5) for sewing the button 6 is folded in half and inserted in the middle of the folded fabric 11 so as to fix and hold the fabric 11. This dough holder 10 can be rotated about the axis of the horizontal shaft 15 via the connecting rods 13 and 14, the horizontal shaft 15, the connecting arm 16 and the connecting shaft 17 by contraction and extension of the cylinder 12. The fabric holder 10 is fixed to a fabric holder swinging arm 18 slidably held on the horizontal shaft 15 in the axial direction through an attachment part 19, and the fabric holder 10 is attached to the horizontal shaft 15 by expansion and contraction of the cylinder 12. By rotating and swinging around the axis, the cloth holder 10 is moved away from the needle plate 4 to hold the cloth 11 in half, and the held half-folded cloth 11 is conveyed onto the needle plate 4. Thus, it is configured to be switchable over a position where it is placed and fixed on the upper surface of the dough guide 3.

  In FIG. 1, reference numeral 20 denotes a fabric presser, and this fabric presser 20 is brought into contact with the upper surface of the double-folded fabric 11 placed on the fabric guide 3 by the fabric holder 10 through a cylinder 21 from above and obliquely. This prevents the fabric 11 from being bent.

  Reference numeral 22 denotes a movable table. The movable table 22 is configured to be movable in the front-rear YY direction and the left-right XX direction orthogonal to each other in a horizontal plane via two stepping motors and a timing belt (not shown). . A pair of left and right fabric holder arms 23 and 24 are fixed to the left and right sides of the movable table 22, and the fabric guide is provided between the middle portions of the pair of left and right fabric holder arms 23 and 24 via attachment pieces 25 and 26. 3 is fixedly connected, and the horizontal shaft 15 is stretched and fixed between the lower ends of the pair of left and right fabric holder arms 23 and 24.

  Reference numeral 27 denotes a button holder arm, and this button holder arm 27 is supported by the movable table 22 via an arm joint 28, whereby the button holder arm 27 and the button holder 5 are connected to the front and rear Y through the movable table 22. It is configured to be able to drive and move integrally in the −Y direction and the left and right XX directions. A fabric holder adjusting plate 29 is provided along the outside of the left fabric holder arm 23, and a lower end portion of the fabric holder adjustment plate 29 is swingably attached around the horizontal shaft 15. A shaft arm stopper 30 is fixed to the connecting rod 14 and is bent so as to be able to contact the upper side of the intermediate portion of the dough holder adjusting plate 29.

  As shown in FIGS. 2 and 3 to 6, a cut groove 31 is formed in the base portion of the fabric holder swinging arm 18, and the engagement claw portions 32 a, A bent portion of a substantially L-shaped crank link 32 having 32 b is fitted, and is pivotally supported around the axis of the horizontal shaft 15. Further, another horizontal shaft 33 is stretched between the pair of left and right fabric holder arms 23 and 24 in parallel with the horizontal shaft 15, and a sewing machine located at an intermediate portion of the horizontal shaft 33 and the rear thereof. When the crank link 32 is swung around the axis of the horizontal shaft 15 with the fabric holder 10 positioned at a predetermined position with respect to the needle plate 4, the frame 34 is provided at both ends of the crank link 32. The pair of left and right collar members 35a and positioning member 36a are fixed so as to form engaged portions 35 and 36 with which the engaging claws 32a and 32b selectively engage. Further, a cylinder (actuator) 38 that moves up and down is fixedly held on the fabric holder swinging arm 18 via a cylinder mount 37, and a connecting piece 39 and a connecting pin 40 are provided at the tip of an operating rod 38a of the cylinder 38. The crank link 32 is pivotally connected through the support. The engaged portion 36 penetrates in the front-rear direction so as to allow movement of the engaging claw portion 32b engaged therewith in the front-rear Y-Y direction.

  With the above-described configuration, the crank link 32 is swung around the axis of the horizontal shaft 15 in accordance with the expansion / contraction operation of the cylinder 38, and one engagement claw portion 32b of the crank link 32 is engaged with the engaged portion 36. 4 and 6, the cloth holder 10 is fixedly held at a predetermined position, and only the movement of the cloth holder 10 in the left-right direction is stopped, and the other engagement of the crank link 32 is performed. By engaging the claw portion 32a with the engaged portion 35, as shown in FIGS. 3 and 5, the position fixing of the fabric holder 10 is released and the fabric holder 10 is moved to the button holder via the movable table 22. 5, a movable / non-movable switching mechanism for the fabric holder that can be switched to a state of moving in the front / rear / left / right direction.

Next, a button attaching operation by the button attaching sewing machine configured as described above will be described.
First, the four-hole button 6 is elastically held by the button holder 5 by operating a cylinder (not shown) or by operating a manual lever, and then the button holder 5 is put into a buttoned sewing posture by extension of the cylinder 7. At the same time, the fabric 11 is folded in the fabric holder 10 and set.

  Next, when the pedal 12 (not shown) is depressed, the cylinder 12 is extended and the fabric holder 10 is rotated about the axis of the horizontal shaft 15 to swing the folded fabric 11 held by the fabric holder 10. The material is conveyed onto the plate 4 and placed and fixed on the upper surface of the fabric guide 3, and the fabric presser 20 is brought into contact with the upper surface of the folded fabric 11 by extension of the cylinder 21 to prevent the fabric 11 from being bent. At this time, the crank link 32 is swung around the axis of the horizontal shaft 15 by the extension operation of the cylinder 38, and one engaging claw portion 32b of the crank link 32 is engaged with the engaged portion 36. As a result, as shown in FIGS. 4 and 6, the cloth holder 10 is fixedly held at a predetermined position of the sewing machine frame 34, and the movement of the cloth holder 10 in the left and right XX directions is stopped. Yes.

  When the sewing machine is operated in this state, the button holder 5 and the fabric holder 10 are moved forward and backward by a distance corresponding to the pitch d2 of the right front and rear holes 6Rf and 6Rr among the four holes of the button 6 via the movable table 22. By reciprocating in the direction, as shown in FIG. 7, button-attached sewing is performed with the number of stitches set in advance by the button-attaching thread RN with respect to the front and rear holes 6Rf, 6Rr on the right side of the button 6.

  Subsequently, of the four holes of the button 6, the left front and rear holes 6Lf, 6Lr are shifted to button sewing. At this time as well, one of the engaging claws 32b of the crank link 32 is shown in FIGS. 6, the cloth holder 10 is fixedly held at a predetermined position of the sewing machine frame 34 in the left and right XX directions of the cloth holder 10. The movement of is still stopped.

  In this state, the sewing machine is operated to move only the button holder 5 through the movable table 22 in 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. As shown in FIG. 7, the button holder 5 and the fabric holder 10 are reciprocated in the front-rear Y-Y direction by a distance corresponding to the pitch d2 of the left front-rear holes 6Lf, 6Lr. Button attachment sewing is performed on the front and rear holes 6Lf and 6Lr with the number of stitches set in advance by the button attachment thread LN.

  As described above, at the time of sewing with a button, the cloth holder 10 is fixedly held at a predetermined position, and the movement of the cloth holder 10 in the left and right XX directions is stopped, and only the button holder 5 is moved to the left and right hole pitches. The right and left buttoning threads RN and LN are attached to the fabric 11 by moving the left and right front and rear holes 6Rf, 6Rr and 6Lf, 6Lr sequentially by an amount corresponding to d1 in the left-right XX direction. As shown in FIG. 8, it is possible to sew in a V-shape, and this may cause a deterioration in the texture due to the occurrence of a sewing wrinkle even when a soft fabric 11 is a sewing object. High-quality button sewing can be performed.

  After the above button sewing is completed, the cylinder 7 is contracted and the button holder 5 is rotated via the connecting rods 8 and 9 to be switched to the root winding sewing posture. It is swung around the axis of the horizontal shaft 15 and one engaging claw portion 32a of the crank link 32 is engaged with the engaged portion 35. As a result, as shown in FIGS. 10 is switched through the movable table 22 together with the button holder 5 so as to be movable in the front-rear Y-Y direction and the left-right XX direction.

  In this state, the movable table 22 is moved to the root winding sewing position O of the first needle shown in FIG. 9 based on the operation signal output from the microcomputer unit (not shown), and then the needle 1 is moved up and down. The button holder 5 and the fabric holder 10 are synchronously reciprocated at predetermined pitches in the front-rear YY direction and the left-right XX direction via the movable table 22 in synchronism with each other in FIGS. As shown in the figure, a neck winding sewing is performed by dropping the needle 1 alternately on both sides of the right and left button attaching threads RN and LN between the fabric 11 and the button 6 and reinforcing the right and left button attaching threads RN and LN with the root winding thread BN. Is done.

  The right and left buttoning threads RN and LN reinforced by the root winding sewing are sewn in a V shape with respect to the cloth 11, and the cloth 11 does not exist between the right and left buttoning threads RN and LN. Even when the root winding thread BN is tightened strongly, there is no occurrence of sewing wrinkles due to the cloth 11 being sewn on the button 6, and as shown in FIG. It can be performed.

  In the above embodiment, the button attaching thread RN for the right holes 6Rf, 6Rr and the button attaching thread LN for the left holes 6Lf, 6Lr of the four hole buttons 6 are sewn in a V shape with respect to the fabric 11. Although the operation when attaching is described, even with the same four-hole button 6, one engagement claw portion 32a of the crank link 32 is engaged with the engaged portion 35, as shown in FIGS. As described above, the right hole 6Rf, 6Rr is also moved to the left hole 6Lf while the fabric holder 10 is always movable with the button holder 5 through the movable table 22 in the front-rear YY direction and the left-right XX direction. By sewing 6Lr as well, the right and left button attaching threads RN and LN can be used as parallel sewing as shown in FIG.

  When the two-hole button is to be sewn, the two holes are set in the front-rear direction and sewn. Therefore, as shown in FIG. 3 and FIG. A state in which the claw portion 32a is engaged with the engaged portion 35 and the fabric holder 10 can always be moved together with the button holder 5 via the movable table 22 in the front-rear YY direction and the left-right XX direction, or the crank Even if the other engaging claw portion 32b of the link 32 is engaged with the engaged portion 36 and the fabric holder 10 is used together with the button holder 5 so as to be movable in the front-rear Y-Y direction, the two-hole button is used. It can be sewn to the fabric 11.

  Further, in the above embodiment, it has been described that it is configured so that button sewing and root winding sewing can be performed continuously with one sewing machine, but it may be applied to a sewing machine dedicated to button attachment. However, it is possible to prevent the occurrence of sewing wrinkles and the like when buttons are attached to a soft fabric, and to improve the quality of the sewing product.

  Further, the movable / non-movable switching mechanism of the fabric holder in the present invention is not limited to the one described in detail in the above embodiment. In short, the fabric holder 10 is fixed and held at a predetermined position. What is possible is to switch between a state in which the movement of the fabric holder 10 is stopped and a state in which the position of the fabric holder 10 is released and the fabric holder 10 is moved together with the button holder 5 in the front-rear and left-right directions. It may be a configuration.

It is a schematic perspective view of the principal part of the sewing machine with a button concerning the present invention. It is a disassembled perspective view of the principal part. It is an expansion perspective view of the principal part which shows the state which canceled the position fixing of the fabric holder. It is an expansion perspective view of the principal part which shows the state which fixed the position of the cloth holder. It is an enlarged side view of the principal part which shows the state corresponding to FIG. It is an enlarged side view of the principal part which shows the state corresponding to FIG. It is a top view of the principal part for demonstrating a button attachment sewing state. It is a front view of the principal part for demonstrating a buttoned sewing state. It is explanatory drawing of a root winding sewing position. It is a perspective view of the principal part which shows a buttoning completion state. It is a front view of the principal part for demonstrating the buttoned sewing state by the conventional general buttoned sewing machine. It is explanatory drawing of the root winding sewing position after button sewing shown in FIG. It is a front view of the principal part explaining the state after completion of the root winding shown in FIG.

1 Needle 4 Needle plate 5 Button holder 6 Button 6Lf, 6Lr, 6Rf, 6Rr Button hole 10 Fabric holder 11 Fabric 15 Horizontal shaft 18 Fabric holder swing arm 22 Movable table 32 Crank links 32a, 32b Engaging claw 34 Sewing frame 35 , 36 Engaged part 38 Cylinder (actuator)
LN, RN Button thread BN Neck winding thread

Claims (2)

A button-attached sewing machine that performs sewing with a button attached to the cloth by passing needles that reciprocate up and down in conjunction with the main shaft of the sewing machine through each hole of the button
A needle plate having a needle drop hole through which the needle passes up and down, a fabric holder inserted in the middle of the folded fabric and holding the fabric, and a buttoned posture in which the needle penetrates the button through the hole A button holder for holding, and a movable table for driving and moving in the front-rear and left-right directions perpendicular to each other in a horizontal plane so that each hole of the button holding the button holder matches the needle drop hole of the needle plate ; when button sewing sewing, before and after the dough holders to release the position fixing state before Symbol dough holder for stopping horizontal movement of the stationary holding to dough holders the fabric holder to a predetermined position together with the button holder It is equipped with a fabric holder movable / non-movable switching mechanism that can be switched to a state of moving in the left-right direction ,
The movable / non-moving switching mechanism includes a position where the cloth holder is moved away from the needle plate to hold the cloth in half and a position where the cloth held in half is transported and fixed on the needle plate. The base part of the fabric holder swinging arm for driving and swinging is pivotally supported about a horizontal axis coaxially with the horizontal axis for slidably holding in the left-right direction, and engaging claws at both ends thereof When the crank link is swung around the axis while the dough holder is positioned at a predetermined position with respect to the needle plate, the engaging claws at both ends are Two engaged portions provided on the movable table side and the sewing machine frame side so as to be alternatively engaged, and the engagement claw portions on both ends of the crank link are alternatively engaged. An actuator that swings and drives to engage Button sewing machine, characterized in that it is al configured. The button-attached sewing machine according to claim 1, wherein the movable / non-movable switching mechanism is provided in a sewing machine that alternately drops needles on both sides of a button-attaching thread extending between a cloth and a button and performs root winding sewing.

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