TWI499702B - Keyhole closure buttonhole device - Google Patents

Description

Keyhole machine buttonhole device

The invention relates to a buttonhole machine for making a buttonhole on a sewing object, in particular to an adjustable position of the hammer and the cutter to change the length of the buttonhole, and lifting the cutting position above the needle plate surface. Round head keyhole sewing machine.

Referring to FIG. 1, a buttonhole cutting device for a known round buttonhole machine has a blade device 20 disposed on a substrate and cooperates with a cutting block 21, and the cutting block 21 is driven by a drive. The rod 22 is driven to generate a vertical movement relative to the device of the blade 20. The stepping motor 23 is driven by a screw 24 to change the horizontal position, and the relative position of the cutting block 21 and the blade 20 is adjusted, so that the buttonhole machine can be cut at one time. Button holes of different lengths are completed under motion.

Referring to FIG. 2, the blade device 20 is designed with a horizontal adjustment structure for adjusting the parallelism between the blade 201 and the cutting block 21. The horizontal adjustment structure has a support plate 202, and one end of the support plate 202 passes at least one ball. The support pin 203 is supported, and the first fixing screw 204 passes through the support pin 203, and the other end of the support plate 202 is inserted through the second fixing screw 205 to the bottom adjustment semi-spherical support screw 206. Thus, the height relationship with the second fixing screw 205 can be changed by the rotation of the supporting screw 206 to adjust the level of the supporting plate 202.

However, although the front buttonhole machine has the function of adjusting the length of the buttonhole and the parallelism between the blade and the cutting block, the missing feature is that when the cutting block and the blade are cut in mutual displacement, when the cutting block moves downward Pushing on the fabric, the fabric will fall into contact with the cutter in the gap between the two needle plates, but because the gap between the two needle plates and the cutting block is not large, if the position of the cutting block is directly changed, The cutting is cut, which often causes the cloth to be caught in the gap between the two needle plates, thereby reducing the production efficiency and product yield of the buttonhole of the buttonhole machine.

The main object of the present invention is to provide that all the knife lifting mechanism is installed in the buttonhole hole device of the buttonhole machine, so that the cloth is placed on the buttonhole machine, and when the cutting is performed, the lower knife will be lifted up and pushed against the cloth to prevent the traditional lock. When the hammer is lowered, the gap between the hammer and the needle plate is too small and the cloth is caught.

A secondary object of the present invention is to provide a level adjustment device between the fabric lifting mechanism and the cutter, which can still perform the parallelism between the cutter and the hammer without additionally increasing the overall volume of the buttonhole device. Adjustment, effectively simplifying the number of components and the volume of the adjustment device.

In order to achieve the above object, the keyhole machine of the present invention is provided with a front end and a base, and a support post is disposed between the front end and the base, the front end of the vehicle is provided with a needle bar which can reciprocate upwardly and downwardly, and the base is provided with a a feeding table in which the horizontal coordinate is displaced in the X and Y directions, and a buttonhole device is disposed behind the needle bar. The buttonhole device has an upper unit assembled at the front position and a position mounted on the base. Lower unit.

The present invention is characterized in that the lower unit is provided with a cutter that cooperates with the upper unit, and the cutter is mounted on all the turrets and is displaced by a lifting device in a vertical Z-axis direction, and the lifting device The cutter is driven upward and pushed up against a cloth, so that a partial section of the cloth is upwardly convex to form a cutting action portion, so that the cloth cutting position of the entire buttonhole machine is raised above the needle board surface.

The lifting device of the present invention comprises: a pedestal, a driving assembly, a displacement member and a connecting rod, wherein the pedestal has a first supporting shaft and a second supporting shaft, and a Between the pedestal and the cutting table is provided The elastic elements are connected to each other.

The driving assembly is coupled to the first shaft end and drives the first shaft to pivot. The driving assembly is provided with a pneumatic cylinder, and the front end of the pneumatic cylinder is pivotally connected to the swing arm by a connecting member, and then The swing arm is sleeved with the first support shaft, so that the pneumatic cylinder can simultaneously drive the first support shaft to reciprocate when the telescopic displacement is generated.

The displacement member is eccentrically pivotally disposed on the first fulcrum, and has an eccentric cam pivoted on the first fulcrum and a displacement block that is wrapped around the eccentric cam, and the eccentric cam and the displacement block are subjected to the above The first axis drives a high and low level difference in the vertical direction.

One end of the connecting rod base is pivotally disposed on the second supporting shaft, and the other end end assembles the cutting table, and the cutting table is adjacent to the displacement member, wherein the connecting rod table is formed into a fork structure, and The cutter table is clamped and fixed by the fork structure.

Furthermore, the cutter table is provided with a cutter plate for facilitating replacement of the cutter; and the cutter table is an upper cutter table connected to the cutter and an upper cutter table The lower cutter table is formed between the lifting devices, wherein the cutter blade is disposed on the upper cutter table, and the lower cutter table is locked by the fork structure.

In addition, there is a level adjusting device between the cutter table and the link table for adjusting the levelness of the cutter, wherein the cutter table has an elongated slot, and the link table The corresponding position is provided with an eccentric pin penetrating into the elongated slot, and when the eccentric pin is pivoted, the cutter table is driven to perform upper and lower yaw.

In summary, the advantage of the present invention is that the lower unit of the buttonhole buttonhole device has a fabric lifting mechanism, so that the cloth is placed on the buttonhole machine, and the lower cutter will be lifted by the driving component when cutting. Pushing on the fabric, so that the cutting position of the buttonhole is raised above the needle plate surface, and then the upper unit is lowered to work together to form a buttonhole, which can prevent the gap between the hammer and the needle plate when the traditional buttonhole machine is lowered. When the cloth is too small and the cloth is caught, the cutting efficiency of the entire button hole is greatly increased.

In addition, the present invention passes between the connecting rod table and the cutter seat through the rotation cooperation between the elongated slot and the eccentric pin, so that the cutter seat pivots at one end to drive the cutter yaw, without additional cutting buttons In the case of the overall volume of the hole device, the level adjustment between the cutter and the hammer can still be performed, which effectively simplifies the number of components and the occupied volume of the adjusting device.

(known)

20‧‧‧ Blade device

201‧‧‧blade

202‧‧‧support plate

203‧‧‧Support pins

204‧‧‧First fixing screw

205‧‧‧Second fixing screw

206‧‧‧Support screw joints

21‧‧‧Cutting block

22‧‧‧ drive rod

23‧‧‧Stepper motor

24‧‧‧ screw

(this invention)

30‧‧‧ front

31‧‧‧Base

32‧‧‧ pillar

33‧‧‧Upper axis

34‧‧‧ needle stick

35‧‧‧ needle

36‧‧‧Feeding table

37‧‧‧

38‧‧‧ needle board

40‧‧‧lower unit

41‧‧‧Cutter

42‧‧‧Cutter table

421‧‧‧Upper knife table

422‧‧‧Under cutting table

423‧‧‧cutting knife

424‧‧‧ screws

425‧‧‧Long slot

43‧‧‧Lifting device

44‧‧‧ pedestal

441‧‧‧first shaft

442‧‧‧second shaft

45‧‧‧Drive components

451‧‧‧ pneumatic cylinder

452‧‧ ‧ pin

453‧‧‧Support board

454‧‧‧Links

455‧‧ ‧ pin

456‧‧‧ swing arm

46‧‧‧ displacement parts

461‧‧‧Eccentric cam

462‧‧‧displacement block

463‧‧‧ screws

47‧‧‧ linkage table

471‧‧‧fork structure

472‧‧‧ shaft parts

473‧‧‧ screws

474‧‧‧Eccentric pin

48‧‧‧Flexible components

50‧‧‧Upper unit

51‧‧‧ hammer

52‧‧‧ drive

53‧‧‧Adjustment device

531‧‧‧ Positioning block

532‧‧‧Sliding seat

533‧‧‧Cam mechanism

534‧‧‧Adjustment wheel

60‧‧‧ cloth

61‧‧‧cutting department

62‧‧‧ gap

1 is a schematic view of a known keyhole machine using a stepping motor to drive the displacement of the cutting block; FIG. 2 is a partial enlarged view of the horizontal adjustment structure of FIG. 1; and FIG. 3 is a side perspective view of the keyhole machine of the present invention. 4 is a perspective view of the inner buttonhole device of the keyhole machine of the present invention; FIG. 5 is another perspective view of the lower unit of the buttonhole device of FIG. 4; and FIG. 6 is a broken view of the lower unit of FIG. Fig. 7 is an exploded view of the lower unit of Fig. 5; Fig. 8 is a schematic view showing a level adjusting device between the lifting device and the cutter holder of the present invention; and Fig. 9 is a view of the upper unit adjusting device of the present invention a perspective view; FIG. 10 is a schematic view showing the buttonhole of the buttonhole machine of the present invention; 11 is a schematic perspective view of a conventional buttonhole machine needle plate; FIG. 12 is a schematic view of a conventional buttonhole machine cutting a buttonhole; and FIG. 13 is a schematic view showing a relative position of a needle plate, a cutter and a hammer according to FIG. Fig. 14 is a schematic view showing the keyhole punching machine of the present invention punched in a conventional manner; and Fig. 15 is a schematic view showing the relative positions of the needle plate, the cutter and the hammer in Fig. 14.

In order to further clarify and understand the structure, the use and the features of the present invention, the preferred embodiment is described in detail with reference to the following drawings:

Referring to FIG. 3, the keyhole machine of the present invention mainly comprises a front portion 30, a base 31 portion and a pillar 32 portion, wherein the front head 30 has an upper shaft 33, and one end of the upper shaft 33 is driven by a drive. a motor (not shown) rotates, and the other end is provided with a needle bar 34 that can reciprocate upwardly and downwardly, and a needle 35 is disposed at a front end of the needle bar 34; and a feeding table 36 is disposed on the upper surface of the base 31. The feeding table 36 is displaceable in the X and Y axis directions of the horizontal coordinate, and the feeding table 36 is provided with two pressing plates 37, and each of the loading plates 37 is respectively provided with a needle plate 38.

Please refer to FIG. 4 and FIG. 5, in addition to the above, the needle bar 34 is further provided with a set of buttonhole device, the buttonhole device is a lower unit 40 and a lower unit. 40 is composed of an upper unit 50 that cooperates.

The lower unit 40 of the present invention is provided with a cutter 41 which cooperates with the upper unit 50, and the cutter 41 is mounted on all the turrets 42 and is displaced by a lifting device 43 in the vertical Z-axis direction. The cutter 41 is displaced upward and pushed against a fabric 60 (refer to FIG. 10), so that a partial section of the fabric 60 is upwardly convex to form a cutting action portion 61, so that the cloth 60 of the entire buttonhole machine can be cut. The cut position is raised above the needle plate 38.

Referring to FIGS. 6 to 7, the cutter table 42 of the present invention is composed of an upper cutter table 421 connected to the cutter 41 and a lower cutter table 422 mounted to the upper cutter table 421. The upper cutter table 421 is provided with a cutter plate 423 for fixing the cutter 41, and is assembled and fixed by the at least one screw 424 in cooperation with the lower cutter table 422.

The lifting device 43 of the present invention is installed inside the base 31, and is mainly composed of a seat 44, a driving assembly 45, a displacement member 46 and a link block 47. Wherein, the pedestal 44 of the present invention has a first support shaft 441 at one end and a second support shaft 442 at the other end, and the drive assembly 45 and the displacement member 46 are pivotally connected by the first support shaft 441, and The second support shaft 442 is pivotally connected to the link base 47.

In addition, the driving assembly 45 is provided with a pneumatic cylinder 451. One end of the pneumatic cylinder 451 is fixed by a supporting plate 453 which is mounted on the inside of the base 31 by a pin 452, and a connecting member 454 is assembled at the other end and can be selectively extended and contracted. In the above-mentioned connecting member 454, a swing arm 456 is pivoted by a pin 455, and the swing arm 456 is sleeved on the end of the first support shaft 441 to drive the first support shaft 441 to pivot. The first support shaft 441 can be reciprocally pivoted by the telescopic displacement generated by the pneumatic cylinder 451 during operation.

Furthermore, the displacement member 46 of the present invention has an eccentric cam 461 pivoted on the first support shaft 441 and a displacement block 462 that is wrapped around the eccentric cam 461. The eccentric cam 461 is a screw. 463 is fixed in the center of the first supporting shaft 441, and the displacement block 462 has a square structure. When the first supporting shaft 441 is pivoted, the eccentric cam 461 will rotate synchronously and drive the displacement block 462 in the vertical direction. Produce a high and low level difference.

Finally, one end of the connecting rod table 47 of the present invention is pivotally disposed on the second supporting shaft 442, and the other end is configured as a fork structure 471. The cutting block 42 is clamped by the fork structure 471 and matched with a shaft. 472 and a screw 473 lock the lower cutter table 422 so that the bottom of the lower cutter table 422 can be adjacent to the displacement block 462. When the pneumatic cylinder 451 is actuated, the cutter 41 swings up and down around the second support shaft 442 attached to the pedestal 44.

The lower cutter table 422 and the pedestal 44 are connected to each other by an elastic member 48. Therefore, the up-and-down gap of all the components combined between the cutter table 42 and the pedestal 44 can be eliminated to ensure the cutter 41 is subjected to the direction. When the impact force is under, there will be no slight jump. In a possible embodiment, the elastic member 48 is configured as a tension spring.

Please refer to FIG. 7 and FIG. 8. In addition, the lower cutting blade 422 is provided with an elongated slot 425 between the shaft 472 and the through hole of the screw 473, and the connecting rod 47 is connected. An eccentric pin 474 is inserted at a position corresponding to the elongated slot 425, so that a horizontal adjustment device can be formed through the elongated slot 425 and the eccentric pin 474. When the user needs to perform the horizontality of the cutter 41. In the adjustment, the screw 473 is first loosened, and then the eccentric pin 474 located inside the elongated slot 425 is rotated, and the lower cutter table 422 is displaced by the upper and lower yaws of the shaft 472. Finally, when the horizontal adjustment of the cutter 41 is completed, the screw 473 is locked and fixed.

Referring to FIG. 4 again, the upper unit 50 of the present invention includes a hammer 51, a driving device 52 for driving the hammer 51 to be displaced in a vertical direction, and driving the hammer 51 to descendly contact the cutter 41; The hammer 51 generates an adjustment means 53 for shifting in the Y direction, whereby the relative position between the hammer 51 and the cutter 41 is changed.

Referring to FIG. 9, in a preferred embodiment, the adjusting device 53 of the present invention is provided with a positioning block 531, and the positioning block 531 is assembled with a sliding seat 532 which is relatively slippery, and the bottom of the sliding seat 532 is assembled. The above-mentioned hammer 51 is assembled with each other; in addition, the sliding seat 532 is further assembled with a cam mechanism 533, and the cam mechanism 533 is connected to an adjusting wheel 534, thereby allowing the user to operate the above When the adjusting wheel 534 is adjusted, the sliding seat 532 is relatively displaced between the positioning block 531 by the cam mechanism 533. Therefore, when the adjustment wheel 534 is adjusted to rotate in the direction of the arrow A, the slide base 532 is moved in the direction of the arrow B (the same as the Y-axis direction in Fig. 3).

Referring to FIG. 10 again, regarding the operation mode of the entire buttonhole machine, the length of the buttonhole is pre-inputted in the controller program, and the position of the hammer 51 is changed by rotating the adjusting wheel 534 until the above The hammer 51 is moved to the set length, and the cutting operation can be performed. When the start of the cutting operation is started, the pneumatic cylinder 451 of the lower unit 40 will be started first, and the cutter 41 is lifted upward. Then, the driving device 52 of the upper unit 50 is also activated to drive the hammer. 51 is vertically lowered until the hammer 51 and the cutter 41 are in contact with each other, and an opening is formed in the fabric 60; finally, a complete buttonhole is formed around the slit.

The present invention will raise the cutter 41 when punching, which is different from the conventional buttonhole device of the conventional round buttonhole machine. Please refer to the conventional unmodified hammer position shown in Figs. 11 to 13 for punching. Method (fixed length of punching), wherein the relevant reference numerals are used to compare the difference between the present invention and the conventional buttonhole machine, so the same structural portions are given the same reference numerals.

Usually, at the time of sewing, in order to prevent the cutter 41 from hitting the cloth 60, the cutter 41 is placed at a position lower than the needle plate 38. In the punching operation, the hammer 51 descends in the direction of the arrow K. When the hammer 51 contacts the upper surface of the cloth 60, the fabric 60 is pressed down until the bottom surface of the hammer 51 comes into contact with the cutter 41, and on the cloth 60. An opening is formed at which point the cloth 60 will be pushed into the gap 62 between the periphery of the hammer 51 and the needle plate 38. Since the rounded portion of the cutter 41 is substantially aligned with the edge of the hammer 51, this situation does not have much problem.

Please refer to FIG. 14 and FIG. 15, however, if the hammer 51 is designed with a displaceable structure to change the relative position of the hammer 51 and the cutter 41 (the length of the punching is variable), it is still in accordance with the foregoing When the hole method is directly operated, when the hammer 51 is moved to the rear side, it can be found that the gap 62 between the two needle plates 38 and the hammer 51 is very narrow, since the cutter 41 is fixed at a position lower than the needle plate 38, Therefore, when the hammer 51 is lowered in the direction of the arrow M on the cloth 60 to perform the punching operation, the cloth 60 is sandwiched between the hammer 51 and the gap 62 between the two needle plates 38, making the punching operation difficult.

Therefore, as shown in FIG. 10, the punching operation of the present invention is performed by the pneumatic cylinder 451 to lift the top knife 60 first before the hammer 51 is lowered. Then, the hammer 51 is further moved to the top. Since the direction of the arrow N is lowered, since the plane of action between the cloth 60 and the cutter 41 is higher than the top surface of the needle plate 38, there is no possibility that the gap 62 is too small to cause an obstacle to the punching operation, and the punching can be smoothly performed. action.

The above embodiments are intended to be illustrative only, and are not intended to limit the scope of the present invention. It is included in the scope of the following patent application.

30‧‧‧ front

31‧‧‧Base

32‧‧‧ pillar

33‧‧‧Upper axis

34‧‧‧ needle stick

35‧‧‧ needle

36‧‧‧Feeding table

37‧‧‧

38‧‧‧ needle board

40‧‧‧lower unit

41‧‧‧Cutter

42‧‧‧Cutter table

421‧‧‧Upper knife table

422‧‧‧Under cutting table

423‧‧‧cutting knife

43‧‧‧Lifting device

44‧‧‧ pedestal

441‧‧‧first shaft

45‧‧‧Drive components

451‧‧‧ pneumatic cylinder

453‧‧‧Support board

454‧‧‧Links

456‧‧‧ swing arm

47‧‧‧ linkage table

50‧‧‧Upper unit

51‧‧‧ hammer

52‧‧‧ drive

53‧‧‧Adjustment device

531‧‧‧ Positioning block

532‧‧‧Sliding seat

533‧‧‧Cam mechanism

534‧‧‧Adjustment wheel

Claims (9)

The invention relates to a keyhole machine for cutting a buttonhole device, which is provided with a front end and a base, and a support post is arranged between the front end and the base, the front end of the vehicle head is provided with a needle bar which can be reciprocated upwards and downwards, and the base is provided with a horizontally a feeding table in which the coordinates of the coordinates of the X and Y axes are displaced, and a buttonhole device is disposed behind the needle bar. The buttonhole device has an upper unit assembled at the front position and a lower position mounted on the base a side unit, wherein the lower unit is provided with a cutter that cooperates with the upper unit, and the cutter is mounted on all the turrets, wherein the cutter table is displaced by a lifting device in a vertical Z-axis direction. . According to the first aspect of the invention, the above-mentioned lifting device drives the cutter upward and pushes against a cloth, so that a partial section of the cloth is upwardly convex to form a cutting action portion. The keyhole locking device according to the first aspect of the invention, wherein the lifting device comprises: a pedestal having a first fulcrum and a second fulcrum; and a driving assembly coupled to the first fulcrum The end portion drives the first fulcrum to pivot; a displacement member is eccentrically disposed on the first fulcrum and is driven by the first fulcrum to generate a height difference in a vertical direction; and a link table, One end is pivotally disposed on the second support shaft, and the other end is assembled with the cutter table, and the cutter table is adjacently contacted with the displacement member. According to the third aspect of the patent application, the buttonhole device of the buttonhole machine is provided, wherein the driving component is provided with a pneumatic cylinder, and the front end of the pneumatic cylinder is pivotally connected to a swing arm by a connecting member, and then the pendulum is The arm sleeve is provided with the first fulcrum, so that the pneumatic cylinder can simultaneously drive the first fulcrum to reciprocate when generating a telescopic displacement. According to the third aspect of the invention, the keyhole locking button hole device, wherein the displacement member has an eccentric cam pivoted on the first fulcrum and a displacement block that is wrapped around the eccentric cam. According to the third aspect of the invention, the keyhole locking button hole device of the invention is characterized in that the connecting rod table is provided with a fork structure to clamp and fix the cutter table. According to the third aspect of the patent application, the keyhole locking device of the buttonhole machine has a level adjusting device between the cutter table and the link table for adjusting the level of the cutter. According to the seventh aspect of the invention, the button cutter has a long slot, and the corresponding position of the link is provided with an eccentric pin penetrating into the elongated slot. When the eccentric pin is pivoted, the cutter table is driven to perform upper and lower yaw. According to the third aspect of the patent application, the keyhole locking device of the buttonhole machine is further provided with an elastic member connected to each other between the pedestal and the cutter table.