TWI509124B - A keyhole with hammer adjustment mechanism - Google Patents

Description

Buttonhole machine with hammer adjustment mechanism

The invention relates to a buttonhole machine for making button holes on a sewing object, in particular to a buttonhole machine capable of cutting button holes of different lengths by adjusting the relative positions of the hammer and the cutter without replacing the parts. .

Referring to FIG. 1A and FIG. 1B, a known buttonhole buttonhole device has a fixing block 11 at one end of the shaft member 10 moving up and down, and a pneumatic cylinder 12 and a built-in block 11 are embedded therein. The sliding mechanism 13 of the pneumatic cylinder 12 is linked so that the sliding mechanism 13 can automatically slide in the Y-axis direction, and the lower end of the sliding mechanism 13 fixes a hammer 14.

When the keyhole machine punches the cloth, the hammer 14 is first moved laterally to the right to the position a1, and the hammer 14 is lowered together with the lower cutter 15 to open the buttonhole 16 on the fabric. When the length L2 of the buttonhole 16 is larger than the hammer length L1, the hammer 14 is moved to the left a2 position, and the hammer 14 is lowered again on the fabric to increase the opening length of the previous buttonhole 16. However, if the length of the two openings is still shorter than the required length L2 of the buttonhole 16, the feed table will be moved in the direction of the arrow a, and then lowered again for the third punching to achieve the desired length of the buttonhole 16.

Although the keyhole machine can punch the length of different button holes without replacing the parts, if the length of the button hole is too long, the hammer must be repeatedly dropped two or three times, so the whole production is performed. The buttonholes have a long working time and cannot be operated quickly.

Referring to FIG. 2, another buttonhole cutting device for a known keyhole machine has a blade 20 disposed on a substrate and cooperates with a cutting block 21, and the cutting block 21 receives a The driving rod 22 is driven to move relative to the vertical direction of the blade 20, and is also combined with a horizontal sliding plate 23 having a guiding rod 24, and the guiding rod 24 is fixedly fixed in a sliding support 26 on a supporting plate 25, and The support plate 25 is mounted on a wall surface of a column 27 for mounting a stepping motor 28, and the stepping motor 28 is connected to the horizontal slider 23 by a screw 29 as a driving member, so that the stepping step can be adjusted. The motor 28 causes the horizontal slide plate 23 to drive the cutting block 21 to change the horizontal position, so that the buttonhole machine can complete the button holes of different lengths under the one-time cutting action.

However, the lack of such a keyhole machine is that the overall driving mechanism that drives the horizontal movement of the cutting block is bulky and has a large number of components. In addition, it occupies most of the operation space between the front and the base, which not only causes manufacturing costs. The rise also caused operational inconvenience.

The main object of the present invention is to provide a keyhole machine with a hammer adjustment mechanism, which can reduce the occupation of the overall mechanism space by simplifying the design of the adjustment device, and the adjustment device is adapted to the adjustment of the automatic and manual mechanisms, and can be used for different use states. Take the best design.

In order to achieve the above object, the hammer adjusting mechanism of the buttonhole device of the keyhole machine of the present invention is provided with a front end and a base, and a support post is arranged between the front end and the base, and the front end is provided with a needle bar capable of reciprocating up and down. The base is provided with a feeding table which is displaceable along the X and Y axes of the horizontal coordinate, and the button bar is provided with a buttonhole device, and the buttonhole device has an upper unit assembled at the position of the front head. And a lower unit mounted at the base position.

The upper unit is provided with a hammer that cooperates with the lower unit, and the hammer is displaced by a driving device in a vertical Z-axis direction, and the hammer is further driven by a adjusting device in a horizontal Y-axis direction. Displacement; wherein the adjusting device has a positioning block mounted on the driving device, and the sliding block is connected to the hammer by the positioning block. The sliding seat is driven by a driving source to perform displacement of the lateral Y-axis, and a sliding slot and a sliding rail are coupled to each other by the sliding seat and the positioning block.

The invention is characterized in that the driving source is mounted on a bracket connected to the positioning block, the sliding seat has a screw hole, and the screw hole and the driving source are combined with each other by a screw, and the axial direction of the screw is parallel to the above The sliding seat is rotated relative to the positioning block in the Y-axis direction, and the screw is rotated by the driving source to relatively displace the screw hole of the sliding seat and the screw. The driving source may be a stepping motor or a manual adjusting wheel.

In order to achieve the above object, the manual adjusting wheel and the positioning block of the present invention have a fixing member for limiting the axial displacement of the screw, and the adjusting device is further provided with a indicating device, and the indicating device is provided with a scale on one side of the positioning block. And an index fixed to the sliding seat and directed to the above scale.

In summary, the invention is characterized in that the number of components of the adjusting device is less than that of the conventional buttonhole machine, the occupation of the overall mechanism space is reduced, and the manufacturing cost of the entire buttonhole machine can be reduced; and the adjusting device of the invention is applied to the automatic and manual mechanism. Adjustments can be optimally designed for different usage states.

[study]

10‧‧‧ shaft parts

11‧‧‧Fixed blocks

12‧‧‧ pneumatic cylinder

13‧‧‧Sliding mechanism

14‧‧‧ hammer

15‧‧‧Cutter

16‧‧‧ buttonhole

20‧‧‧blade

21‧‧‧Cutting block

22‧‧‧ drive rod

23‧‧‧ horizontal skateboard

24‧‧‧guides

25‧‧‧Support board

26‧‧‧Sliding support

27‧‧‧ Column

28‧‧‧Stepper motor

29‧‧‧ 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‧‧‧Upper unit

41‧‧‧ hammer

42‧‧‧ drive

421‧‧‧ drive cylinder

422‧‧‧First shaft

423‧‧‧ Telescopic rod

424‧‧‧Connected wrist

425‧‧‧second shaft

426‧‧‧ Third shaft

427‧‧‧Up and down axis

428‧‧‧Guide

43‧‧‧ adjustment device

431‧‧‧ Positioning block

431a‧‧ ‧ chute

431b‧‧‧ bracket

431c‧‧‧through hole

432‧‧‧Sliding seat

432a‧‧‧rails

432b‧‧‧ hammer plate

432c‧‧‧ screw hole

433‧‧‧ drive source

434‧‧‧ screw

434a‧‧‧ positioning ring

435‧‧‧stepper motor

436‧‧‧Manual adjustment wheel

437‧‧‧Fixed parts

437a‧‧‧ openings

438‧‧‧ indicating device

438a‧‧‧scale

438b‧‧ indicators

50‧‧‧lower unit

51‧‧‧Cutter

1A is a schematic view of a single key cutting operation of a known keyhole machine; FIG. 1B is a plan view of a known buttonhole sewing machine button hole; FIG. 2 is a known keyhole machine using a stepping motor to drive a cutting block shift Figure 3 is a side perspective view of the keyhole machine of the present invention; Figure 4 is a partial cross-sectional view of the upper unit of the buttonhole device of Figure 3; Figure 5 is a perspective view of the automatic adjustment device of the present invention; Figure 6 is a cross-sectional view of the manual adjustment device of the present invention; and Figure 7 is a perspective view of the manual adjustment device of the present invention.

For a more detailed and detailed understanding and understanding of the structure, the use and the features of the present invention, the preferred embodiments are described in detail with reference to the drawings as follows: Referring to FIG. 3, the lock of the present invention is shown. The eye machine 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 rotated by a driving motor (not shown), and the other end is rotated. A needle bar 34 for reciprocating motion is provided, and a needle 35 is disposed at a front end of the needle bar 34. A feeding table is disposed on the upper surface of the base 31 so as to be displaceable in the X-axis and Y-axis directions of the horizontal coordinate 36, and the feeding table 36 is provided with two pressing plates 37, and each of the pressing plates 37 is provided with a needle plate 38.

In addition, the needle bar 34 is further provided with a set of buttonhole device, and the buttonhole device is composed of an upper unit 40 and a lower unit 50 that cooperates with the upper unit 40. The upper unit 40 has a hammer 41 at the position of the front end 30, and the lower unit 50 has a cutter 51 located below the hammer 41, and the hammer 41 is driven by a driving device 42. The vertical Z-axis direction produces a reciprocating displacement, so that the hammer 41 can be brought into contact with the cutter 51 of the lower unit 50 during the downward movement.

The hammer 41 and the driving device 42 are connected to each other by an adjusting device 43 so that the hammer 41 can be driven by the adjusting device 43 to generate displacement in the horizontal Y-axis direction, thereby adjusting the hammer 41 and cutting. The relative position between the knives 51 to change the length of the cut buttonhole.

In the preferred embodiment of the present invention, the driving device 42 of the present invention is provided with a driving cylinder 421 for driving. The driving cylinder 421 can be configured as a pneumatic cylinder, and one end of the driving cylinder 421 is used. A first support shaft 422 is assembled and fixed to the base 31, and the other end is coupled to a connecting wrist 424 via a telescopic rod 423. The connecting wrist 424 has a second support shaft 425 fixed to the front end 30, and The second shaft 425 is free to rotate centrally, and the other end is connected to a vertical shaft 427 by a third shaft 426. The upper and lower shafts 427 are sleeved with the guides 428 fixed to the front end 30 to restrict the vertical displacement of the vertical shaft 427 in the up and down directions.

As shown in FIG. 4 and FIG. 5, the adjusting device 43 of the present invention is provided with a positioning block 431 mounted on the bottom end of the upper and lower shafts 427, and a sliding seat 432 connected to the hammer 41 is movably assembled by the positioning block 431. The sliding seat 432 is further driven by a driving source 433 to generate a lateral Y-axis displacement.

The bottom of the positioning block 431 has a sliding slot 431a, and the top of the sliding base 432 is provided with a sliding rail 432a that engages with the sliding slot 431a. The side surface is further provided with a hammer pressing plate 432b for facilitating replacement of the hammer 41. The slide rail 432a extends outwardly from the sliding slot 431a by a partial length, and has a screw hole 432c formed along the Y-axis direction at one end, and the screw hole 432c and the screw 434 are screw-fitted to each other. The other end is connected to a driving source 433 formed by a stepping motor 435, wherein the stepping motor 435 is located behind the positioning block 431 such that the axial direction of the screw 434 is parallel to the sliding seat 432 with respect to the positioning block. The lateral Y-axis direction of the 431 actuation.

When the driving device 42 drives the positioning block 431, the sliding seat 432, and the hammer 41 to simultaneously move up and down, the driving source 433 also follows the positioning block 431 to simultaneously perform up and down displacement.

As shown in the figure, one end of the positioning block 431 has a bracket 431b interposed between the stepping motor 435 and the sliding seat 432. The bracket 431b has a through hole 431c corresponding to the screw hole 432c, and the above-mentioned vehicle head 30 is located. The external driving source 433 is fixed to the bracket 431b, and one end of the screw 434 is connected to the stepping motor 435, and the other end is inserted through the through hole 431c and screwed into the screw hole 432c, and is driven by the stepping motor 435. The screw 434 rotates and converts the rotational motion into a linear motion via the screw hole 432c of the slide base 432, so that the slide base 432 can be relatively displaced in the lateral Y-axis direction.

Referring to FIG. 6 and FIG. 7 , the driving source 433 of the adjusting device 43 of the present invention may also be configured as a manual adjusting wheel 436 . The difference from the stepping motor 435 embodiment is that the manual adjusting wheel 436 and the positioning block 431 are A fixing member 437 is disposed at one end of the bracket 431b. The fixing member 437 is provided with an opening 437a through which the screw 434 is inserted. The screw 434 is connected at one end to the manual adjusting wheel 436, and the other end is connected to the manual adjusting wheel 436c. The opening 437a is screwed to the screw hole 432c. The outer circumference side of the screw 434 is provided with a positioning ring 434a. The positioning ring 434a is interposed between the bracket 431b and the fixing member 437, and is sandwiched by the fixing member 437 and the bracket 431b. In turn, the axial displacement of the screw 434 is limited. The rest of the sliding seat 432 and the screw hole 432c are the same as the above-described stepping motor 435 embodiment, and will not be described herein.

In this embodiment, the adjusting device 43 is further provided with a pointing device 438. The indicating device 438 has a scale 438a on the side of the positioning block 431, and is fixed on the same side of the sliding seat 432 corresponding to the scale 438. An indicator 438b, the indicator 438b is used to point to the scale 438a, which is convenient for the user to read.

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.

41‧‧‧ hammer

43‧‧‧ adjustment device

431‧‧‧ Positioning block

431a‧‧ ‧ chute

431b‧‧‧ bracket

432‧‧‧Sliding seat

432a‧‧‧rails

432b‧‧‧ hammer plate

433‧‧‧ drive source

434‧‧‧ screw

435‧‧‧stepper motor

Claims (6)

A keyhole machine with a hammer adjustment mechanism, comprising a front end and a base, and a support pillar is arranged between the front end and the base, wherein the front end of the vehicle head is provided with a needle bar which can reciprocate upwardly and downwardly, and the base body is provided with a a feeding table in which the X and Y axes of the horizontal coordinate 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 position mounted on the base. The lower unit is provided with a hammer that cooperates with the lower unit, and the hammer is displaced by a driving device in a vertical Z-axis direction, and the hammer is further driven by an adjusting device. Displacement of the Y-axis direction, wherein the adjusting device has a positioning block mounted on the driving device, and the sliding block is connected to the hammer by the positioning block, and the sliding seat is driven by a driving source. The displacement of the lateral Y-axis is characterized in that: the sliding seat has a screw hole, and the screw hole and the driving source are connected to each other by a screw The axial direction of the screw is parallel to the lateral Y-axis direction of the sliding seat relative to the positioning block, and the screw is rotated by the driving source, and the rotary motion is converted into the positioning block and the sliding seat via the screw hole of the sliding seat. The linear motion between them causes the relative displacement between the screw holes of the sliding seat and the screw. A keyhole machine having a hammer adjusting mechanism according to the first aspect of the invention, wherein the positioning block has a bracket perpendicular to the axial direction of the screw, and the driving source is mounted on the bracket. The buttonhole machine having a hammer adjusting mechanism according to the second aspect of the invention, wherein the driving source is a stepping motor. The keyhole machine with a hammer adjustment mechanism according to the second aspect of the invention, wherein the drive source is a manual adjustment wheel. The keyhole machine with a hammer adjustment mechanism according to the fourth aspect of the invention, wherein the manual adjustment wheel and the positioning block have a fixing member, and the fixing member has an opening through which the screw is inserted, and the above The outer peripheral side of the screw has a positioning ring that is sandwiched by the fixing member and the bracket. The buttonhole machine with a hammer adjustment mechanism according to claim 4, wherein the adjustment device is further provided with a pointing device.