JP2017038723A - Holding mechanism of buttonhole sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding mechanism of a buttonhole sewing machine.SOLUTION: A holding mechanism of a buttonhole sewing machine comprises a support device, lower cloth presser devices, a lift stand, a lift device, and upper cloth presser devices. The support device comprises: a cloth rack in which cut areas are formed; and a movement rack linked with a first driving source. Each lower cloth presser device is arranged below the cloth rack and comprises a lower unit which is aligned with the position of each cut area, and which is linked with a second driving source. The lift device is attached between the lift stand and the support device. Each upper cloth presser device is attached to the lift stand and is provided with an upper unit which is aligned with each lower cloth presser device, and which is linked with a third driving source. The upper unit is combined with the lower unit to form holding means. The upper and lower cloth presser devices are linked with the independent driving sources and are made to hold and fix cloth at the height position of a feed plate. After the feed plate is separated, the cloth is moved to the height position of the cloth rack, so that the displacement of the held cloth due to the influence of the friction of the feed plate is avoided, thereby improving the accuracy of buttonhole sewing.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a buttonhole sewing machine that performs buttonhole sewing of clothing, and more particularly to a pinhole sewing machine that employs cloth pressing and clamping simultaneously at the top and bottom and can automatically sew a plurality of buttonholes.

  A buttonhole sewing machine is a process in which a cloth is repeatedly pressed by a plurality of upper and lower pressing devices in the process of forming buttonholes in clothing, and operations such as pressing, transmitting and releasing are performed. With the buttonhole sewing machine, perform buttonhole sewing.

  A fixed horizontal holding plate is provided on the lower part of the upper and lower presser of a general buttonhole sewing machine, and a rotary presser plate is provided on the upper part, and the presser plate is pivotally positioned by a rotating shaft, In addition, a spring is provided between the pressing plate and the rotating shaft, and the pressing plate can selectively receive the pressing of the piston rod of the cylinder, and performs the pressing operation by combining the horizontal holding plate by the vibration of the rotating shaft. . Further, when it is not necessary to perform pressing, the piston rod of the cylinder recovers upward, and the pressing plate recovers to an initial position by the action of a leaf spring, causing the vertical pressing device to release the cloth.

  Referring to FIG. 1, another known buttonhole sewing machine vertical presser is provided with a horizontal presser plate 10 on the upper portion, a cylinder 11 above the presser plate 10, and the cylinder The piston rod 12 of the eleven is directly connected and fixed to the pressing plate 10, and the pressing plate 10 holds the horizontal state in the driving of the cylinder 11, performs vertical movement, and combines the horizontal fixed holding plate 13. .

  When it is necessary to hold the cloth, the cloth is fed by the feed plate 14 between the pressing plate 10 and the holding plate 13, and the pressing plate 10 is lowered vertically while maintaining the horizontal state. The cloth is held between the pressing plate 10 and the holding plate 13 by the opening of the feed plate 14 and then the feed plate 14 can perform a return operation. Further, when it is necessary to open the cloth, the pressing plate 10 rises vertically while maintaining the horizontal state, is detached from the holding plate 13 and opens the cloth.

  However, the design of the rotary or horizontal holding plate is such that when the cloth is mounted on the upper and lower holding device by the feed plate, a gap larger than the thickness of the feed plate is generated between the fabric and the holding plate, and the feed plate becomes the holding plate and the holding plate. However, when the presser plate is moved and pressed downward, the cloth is still stretched and displaced due to the friction of the feed plate, causing an error in the position of the button hole.

China Patent Notice CN102304824B Chinese Patent Publication No. CN102358997A

  The object of the present invention is to design a holding mechanism in which independent driving sources are interlocked with the upper and lower cloth presser devices, to fix the cloth at the height position of the feed plate, and to apply the cloth after the feed plate is separated. It is to move to the height position of the rack, to avoid the phenomenon that the conventional holding and fixing cloth is pulled and displaced in the opening of the feed plate, and to effectively improve the accuracy of buttonhole sewing.

  In order to achieve the above object, the buttonhole sewing machine clamping mechanism according to the present invention is used to clamp a cloth to be placed and transmitted on a feed plate, and performs a movement process necessary for subsequent sewing in conjunction with the cloth. The clamping mechanism includes a support device, a plurality of lower cloth pressing devices, a lifting stand, at least one lifting device, and an upper cloth pressing device.

  The support device includes a cloth holding plate and a movable rack connected to the cloth holding plate, the cloth holding plate is provided with a plurality of cuts arranged at intervals, and the movable rack serves as an action of the first drive source. In response, the linear movement in the horizontal direction can be performed.

  Each of the plurality of lower cloth pressing devices is located below the cloth holding plate, and each lower cloth pressing device has a lower unit aligned with the position of the cut edge, and the lower unit is Further, the linear movement in the vertical direction can be selectively performed under the action of the second drive source. The second drive source moves between the first height position aligned with the feed plate plane and the second height position aligned with the cloth holding plate plane in conjunction with the lower unit.

  The elevating stand is located above the support device, and the elevating device is attached between the support device and the elevating stand, and is selectively interlocked with the elevating stand to perform vertical vertical displacement. it can.

  Each of the plurality of upper cloth pressing devices is attached to the lifting stand, and each upper cloth pressing device is aligned with one of the plurality of lower cloth pressing devices, and is clamped in accordance with the lower unit. An upper unit forming means is provided, and the upper unit can selectively perform vibration displacement under the action of the third drive source.

  After the feed plate has placed and positioned the cloth, the feed plate is moved from a standby position to a processing position located between the lower cloth pressing device and the upper cloth pressing device, and the cloth is moved to the processing position. The lower plate and the upper unit are jointly held and fixed, and the feed plate returns to the initial standby position.

  In a preferred embodiment, the lower unit has a lower pressing plate, and a connector attached between the lower pressing plate and the second drive source, and the lower pressing plate is a pressing portion parallel to the cut surface. And an assembly portion to be assembled with the connector, and an inclined portion is provided between the pressing portion and the assembly portion.

  The upper unit has a fixing portion attached to the lifting stand, the fixing portion is pivotally attached to the pressing arm by a shaft member, one end of the pressing arm is assembled with an upper pressing plate, and the other end is Adjacent to the third drive source, the shaft member is assembled with an end portion of a torsion spring, and the other end of the torsion spring is used to abut one of the pressing arm or the upper pressing plate. .

  The pressing arm is further provided with an adjusting screw that contacts the lifting stand.

  In a possible embodiment, the third drive source is provided with a pressing cylinder, and the shaft member of the pressing cylinder can move between a contracted position and an extended position, and when the shaft member is in the contracted position, The upper unit receives the action of the torsion spring and maintains the pressed position. When the shaft member is in the extended position, the upper unit is held in the raised position upon contact with the shaft member. The

  An advantage of the present invention is that the lower cloth presser device includes a lower unit and a second driving source, and the lower unit can selectively perform linear movement in the vertical direction. Raise the unit in advance, let the lower unit and the upper unit perform the cloth clamping work at the altitude position of the feed plate, and after the feed plate leaves, move the lower unit to the altitude position of the fabric rack. The upper unit is to lower the cloth synchronously by the action of the torsion spring and to effectively improve the accuracy and yield of buttonhole sewing without causing any displacement phenomenon.

It is sectional drawing of the conventional buttonhole sewing machine clamping mechanism. It is a side view of the buttonhole sewing machine base of the present invention. It is a side view which shows the buttonhole sewing machine of the buttonhole sewing machine base of this invention, a clamping mechanism, and a feed plate. It is a three-dimensional view of the clamping mechanism of the present invention. It is an exploded view of the clamping mechanism of FIG. FIG. 6 is an exploded view of the lower cloth presser of FIG. 5. FIG. 6 is an exploded view of the upper cloth presser device of FIG. 5. FIG. 6 is a cross-sectional view of the upper cloth presser device of FIG. 5. It is sectional drawing of the standby state of the up-and-down side fabric pressing device of this invention. It is sectional drawing which puts a cloth on the feed plate of this invention, and enters between the upper and lower cloth pressing devices. It is sectional drawing with which the upper and lower side fabric pressing device of this invention clamps a cloth in 1st height position. It is sectional drawing which the feed plate of this invention opens | releases cloth and leaves | separates from between the upper and lower side cloth pressing devices. It is sectional drawing with which the upper-lower cloth holding | suppressing apparatus of this invention descend | falls cloth to the 2nd height position. It is explanatory drawing in which the clamping mechanism of this invention clamps cloth and performs horizontal linear movement. It is sectional drawing which the pinching mechanism of this invention open | releases cloth and recovers to a standby state.

  In order that the structure, use and features of the present invention will be more clearly recognized and understood in detail, examples will be given and described in detail below with reference to the drawings.

  2 and 3, the sewing apparatus of the present invention has a buttonhole sewing machine 2, a clamping mechanism 3, and a feed mechanism 4, and the buttonhole sewing machine 2 and the feed mechanism 4 are respectively Arranged in two opposite directions of the clamping mechanism 3, of which the buttonhole sewing machine 2 is attached to a vertical arrangement position along the X-axis direction of the clamping mechanism 3, and the feeding mechanism 4 is The feed plate 40 is installed in parallel to the side position of the mechanism 3 and can be displaced in the Y-axis direction toward the clamping mechanism 3, and is arranged at a plurality of intervals on the feed plate 40 edge. And a suction hole 42 for sucking and localizing a plurality of cloths 5 (see FIG. 10).

  As shown in FIGS. 4 and 5, the clamping mechanism 3 of the present invention includes a support device 30, a plurality of lower cloth pressing devices 31, at least one lifting device 32, a lifting stand 33, and an upper cloth pressing device. 34.

  The support device 30 of the present invention has a cloth holding plate 301 having a height lower than that of the feed plate 40 and a movable rack 302 connected to the bottom of the cloth holding plate 301, and connecting portions on both side bottoms of the movable rack 302. 303, and the connecting portion 303 is further connected to a first driving source (not shown), and the receiving first driving source can selectively perform horizontal X-axis direction linear movement. Among them, the cloth holding plate 301 is provided with a plurality of cut openings 304 arranged at intervals, and a plurality of first attachment portions 305 are formed at positions of the movable rack 302 with respect to the cut openings 304, and both side end portions are further provided. A second attachment portion is formed respectively.

  As shown in FIGS. 5 and 6, the plurality of lower cloth pressers 31 of the present invention are all disposed below the cloth holding plate 301 of the support device 30, and each of the first attachment portions of the movable rack 302. As shown in FIG. 6, the lower cloth presser 31 has a lower unit 311 aligned with the position of the cut end 304 and a second drive source 312 that is assembled to the first attachment portion 305. The second driving source 312 can selectively perform linear movement in the vertical Z-axis direction.

  Among them, the lower unit 311 includes a lower pressing plate 313 and a connector 314 attached between the lower pressing plate 313 and the second drive source 312, and the lower pressing plate 313 includes the cut end 304. A pressing portion 315 parallel to the connector 314 and an assembly portion 316 assembled to the connector 314, and an inclined portion 317 is formed between the pressing portion 315 and the assembly portion 316. The second driving source 312 is provided in a pressing cylinder 318. The pressing cylinder 318 is linked to the lower unit 311 and is aligned with the plane of the feed plate 40. It moves vertically between the position and the second altitude position aligned with the plane of the cloth holding plate 301.

  The lifting device 32 according to the present invention is attached to the second mounting portions 306 on both sides of the movable rack 302, and each of the lifting devices 32 has a lifting cylinder 321 assembled to the second mounting portion 306, and Reference numeral 321 has two lifting shafts 322 extending along the vertical Z-axis direction, and a connecting member 323 is connected to the end of the lifting shaft 322.

  The lifting stand 33 of the present invention is disposed above the support device 30 and forms a third mounting portion 331 at the center of the lifting stand 33, and further forms a fourth mounting portion 332 at two ends. The two fourth attachment portions 332 are respectively connected to the connection members 323 of the lifting device 32, and the lifting device 32 is selectively interlocked with the lifting stand 33 via the support device 30 and the lifting stand 33. The displacement in the vertical Z-axis direction can be performed.

  As shown in FIGS. 5 and 7, the plurality of upper cloth pressing devices 34 of the present invention are all attached to the third mounting portion 331 of the lifting stand 33, and each upper cloth pressing device 34 includes a plurality of upper cloth pressing devices 34. Aligned with one of the lower cloth pressing devices 31, the upper cloth pressing device 34 has an upper unit 341 in which the lower unit 311 together forms a gripping means, and the upper unit 341 includes Furthermore, the vibration displacement can be selectively performed under the action of the third drive source 342.

  The upper unit 341 has a fixing portion 343 attached to the third attachment portion 331, the fixing portion 343 is pivotally attached to the pressing arm 345 by the shaft member 344, and the upper pressing plate 346 is attached to one end of the pressing arm 345. The other end is adjacent to the third drive source 342, the shaft member 344 has an opening 347 and is assembled with the end of the torsion spring 348, and the other end of the torsion spring 348 is It is used to contact either one of the arm 345 or the upper holding plate 346. Further, the pressing arm 345 further includes an adjusting screw 349 that abuts on the lifting stand 33, thereby adjusting a gap between the upper pressing plate 346 and the holding plate 301.

  As shown in FIG. 8, in a possible embodiment, the third driving source 342 is provided as a pressing cylinder 342a, and the pressing cylinder 342a can reciprocate between a retracted position and an extended position. When the shaft 342b is in the retracted position, the upper unit 341 receives the action of the torsion spring 348 so that the upper pressing plate 346 has a pressing position 35 that contacts the lower unit 311. When the shaft 342b is in the extended position, the upper unit 341 receives the contact of the shaft 342b and holds the upper pressing plate 346 in the raised position 36.

  As shown in FIG. 9, when the clamping mechanism 3 of the present invention is in an unused standby state, the pressure cylinder 318 of the second drive source 312 is in a contracted state, and the upper part of the lower pressing plate 313 is The pressing cylinder 342a of the third drive source 342 and the lifting cylinder 321 of the lifting device 32 are both in an extended state, and the upper pressing plate 346 is held at the raised position 36 so as to be aligned with the planar height of the cloth holding plate 301. Let

  As shown in FIG. 10, when the clamping mechanism 3 of the present invention is used, the feed plate 40 first stably adsorbs the cloth 5 through the intake holes 42, and then moves the feed plate 40 from the standby position in the Y-axis direction. Is moved between the lower pressing plate 313 and the upper pressing plate 346 and moved to the concave groove 41 of the feed plate 40, and presents a machining position in a state where it is substantially aligned with the cut end 304 of the cloth holding plate 301. Let

  Referring to FIG. 11, after that, the pressure cylinder 318 of the second drive source 312 is changed from the contracted state to the expanded state, and the second altitude position where the upper part of the lower pressing plate 313 is aligned with the feed plate 40. To rise. At the same time, the pressing cylinder 342a of the third drive source 342 is changed from the extended state to the contracted state, whereby the torsion spring 348 uses the shaft member 344 as a fulcrum, and the pressing arm 345 and the upper pressing plate 346. The upper presser plate 346 and the lower presser plate 313 jointly hold the fabric 5 and position it in conjunction with each other and vibrate downward until it contacts the fabric 5 at the same time.

  As shown in FIG. 12, the feed plate 40 moves along the reverse direction of the Y-axis after opening the cloth 5 through the intake holes 42, and returns the feed plate 40 to the initial standby position.

  As shown in FIG. 13, subsequently, the pressure cylinder 318 of the second drive source 312 and the lift cylinder 321 of the lift device 32 change from the expanded state to the contracted state, and the pressing cylinder 342 a of the third drive source 342 changes. Still keeps contracted. At this time, the upper part of the lower presser plate 313 is lowered to a plane height aligned with the cloth holding plate 301, and the upper presser plate 346 receives the downward interlock of the elevating stand 33, and the lower presser plate 346 and The lowering plate 313 is processed at the same time as the lowering plate 313 is processed in synchronism, and at the same time, the upper pressing plate 346 stably holds the cloth and is displaced downward.

  As shown in FIG. 14, the upper presser plate 346 of the upper presser device 34 and the lower fabric presser plate 313 of the lower fabric presser device 31 are positioned at the first height position of the fabric holding plate 301 and 5, the clamping mechanism 3 receives the action of the first drive source, moves the movable rack 302 along the plane X-axis direction, and the buttonhole sewing machine 2 performs the subsequent sewing work. Make it easy.

  As shown in FIG. 15, finally, the clamping mechanism 3 completes the sewing work, and the pressing cylinder 342a of the third driving source 342 and the lifting cylinder 321 of the lifting stand 33 simultaneously change from the contracted state to the extended state. At this time, the upper presser plate 346 releases the cloth by performing an operation process in which the third driving source 342 and the lifting / lowering stand 33 are interlocked and simultaneously vibrates vertically upward and upward. Then, the clamping mechanism 3 is returned to the standby state, and the cloth 5 slides down into the collecting device (not shown) along the slope formed by the cloth holding plate 301.

  In the present invention, the preferred embodiments have been disclosed as described above, but these are not intended to limit the present invention in any way, and anyone who is familiar with the technology can make an equivalent scope without departing from the spirit and scope of the present invention. Of course, various fluctuations and hydration colors can be added.

[Conventional technology]
10 Holding plate 11 Cylinder 12 Piston rod 13 Holding plate 14 Feed plate [Invention]
2 Buttonhole sewing machine 3 Holding mechanism 30 Support device 301 Cloth holding plate 302 Moving rack 303 Connection portion 304 Cut end 305 First attachment portion 306 Second attachment portion 31 Lower cloth presser device 311 Lower unit 312 Second drive source 313 Below Side pressing plate 314 Connector 315 Pressing portion 316 Assembly portion 317 Inclining portion 318 Pressure cylinder 32 Lifting device 321 Lifting cylinder 322 Lifting shaft 323 Connection member 33 Lifting stand 331 Third mounting portion 332 Fourth mounting portion 34 Upper cloth pressing device 341 Upper side Unit 342 Third drive source 342a Press cylinder 342b Shaft 343 Fixed portion 344 Shaft member 345 Press arm 346 Upper presser plate 347 Opening hole 348 Torsion spring 349 Adjustment screw 35 Pressing position 36 Lifting position 4 Feed mechanism 40 Feed plate 41 Groove 42 Intake Hole 5 cloth

Claims (7)

A pinhole sewing machine clamping mechanism that is used to clamp a cloth that is moved by a feed plate and performs the movement necessary for sewing in conjunction with the cloth, the clamping mechanism comprising:
A cloth holding plate and a movable rack connected to the cloth holding plate, wherein the cloth holding plate is provided with a plurality of cut edges arranged at intervals, and the movable rack is horizontally received by the action of the first drive source. A support device capable of selectively performing linear movement of directions;
The lower unit is disposed below the cloth holding plate and aligned with the cut end, and the lower unit selectively performs linear movement in the vertical direction under the action of the second drive source. A plurality of lower cloth pressers capable of
An elevating stand disposed above the support device;
At least one elevating stand attached between the support device and the elevating stand and capable of performing vertical vertical displacement by selectively interlocking the elevating stand;
The upper unit is attached to the elevating stand and has an upper unit that forms a clamping means by aligning the lower unit at a position aligned with each lower cloth presser, and the upper unit receives the action of the third drive source. A plurality of upper cloth pressers that can selectively perform vibration displacement,
A mechanism for pinching a buttonhole sewing machine including   After the feed plate places and positions the cloth, the feed plate moves from a standby position to a processing position between the lower cloth pressing device and the upper cloth pressing device, and the lower side of the cloth is moved to the processing position. 2. A buttonhole sewing machine clamping mechanism according to claim 1, wherein the holding mechanism is jointly fixed by the unit and the upper unit, and the feed plate is then returned to the initial standby position.   2. The second drive source interlocks the lower unit to move between a first height position aligned with the plane of the feed plate and a second height position aligned with the plane of the cloth holding plate. A mechanism for pinching a buttonhole sewing machine as described in 1.   The button-hole sewing machine clamping mechanism according to claim 1, wherein the lower unit includes a lower pressing plate and a connector attached between the lower pressing plate and the second drive source.   The buttonhole sewing machine clamping mechanism according to claim 4, wherein the lower pressing plate includes a pressing portion parallel to the cut end and an assembly portion assembled with the connector.   The upper unit has a fixing part attached to the lifting stand, the fixing part pivotally attaches a pressing arm by a shaft member, one end of the pressing arm is assembled with an upper pressing plate, and the other end is 2. The buttonhole sewing machine clamping mechanism according to claim 1, wherein the shaft member is assembled with an end portion of a torsion spring adjacent to the third drive source.   The mechanism for pinching a buttonhole sewing machine according to claim 6, wherein the pressing arm is further provided with an adjusting screw that comes into contact with the elevating stand.

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