JPH0720177U - Sewing machine clamp device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a clamp device for a sewing machine that can reliably prevent rattling of a cloth placing plate to be sewn. [Structure] A cloth feed table provided on a bed of a sewing machine so as to be movable in XY directions, a cassette type cloth holding plate for holding a cloth to be sewn, and a cassette type cloth holding plate are detachably supported on the cloth feeding table. In the clamp device of the sewing machine having the support means, the support means is provided with a first engaging portion 32 that is vertically movable with respect to the cloth feed table 4, and a second engagement portion provided on the cloth feed table.
And the third engaging portions 40 and 46, and the driving means capable of horizontally reciprocating the third engaging portion provided on the cloth feed base, and the cassette type cloth holding plate 38 is the first. A first engaged portion that is vertically disengageable from the engaging portion, and first and second engageable portions that are horizontally disengageable from the second and third engaging portions. And a clamp device for a sewing machine, which has a third engaged portion 48, 50, 52.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clamp device for a sewing machine.

[0002]

[Prior art]

 A sewing machine having a cloth feed table provided on the bed of the sewing machine so as to be movable in the XY directions, a cassette type cloth holding plate, and a supporting means for detachably supporting the cassette type cloth holding plate on the cloth feeding table; Clamping devices are known in the art.

If the supporting means of the clamp device of the sewing machine does not reliably support the cassette type cloth holding plate, the cassette type cloth holding plate is loosened, the quality of the sewn product is deteriorated, or the sewing becomes impossible. Therefore, in Japanese Utility Model Publication No. 63-21257, two engaging portions between the cloth feed base and the cassette type cloth holding plate are provided to support the cassette type cloth holding plate at two points, and one of the engaging parts is also provided. Discloses a combination of a rod with a conical tip and a groove.

When this clamp device is used, the rattling of the cassette type cloth holding plate is reduced in the case of a normal sewing object, and a satisfactory sewing product quality can be obtained.

[0005]

[Problems to be solved by the device]

 However, when the clamp device is used for sewing a long tubular workpiece such as a slacks front stitch, the following problems occur.

Since the cassette-type cloth holding plate on which the long tubular workpiece is placed has an elongated shape, the load on the tip end side of the cassette-type cloth holding plate is only supported by two points on the cloth feed base. Therefore, it is still easy to get backlash. This tendency becomes remarkable especially when it is used for sewing work in which a large load is applied to the tip end side of the cassette type cloth holding plate.

Further, even in the case of ordinary sewing work other than the sewing work of the long tubular workpiece, it is desired to further reduce rattling in order to improve the quality of the sewn product.

Therefore, an object of the present invention is to provide a sewing machine clamp device which can more reliably prevent the cassette type cloth holding plate from rattling.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, according to the present invention, a cloth feed table provided on the bed of the sewing machine so as to be movable in the XY directions, a cassette type cloth holding plate for holding the cloth to be sewn, and the above cassette type. In a clamp device for a sewing machine, which includes a support means for detachably supporting a cloth holding plate on the cloth feed table, the support means includes a first engaging portion that is vertically movable with respect to the cloth feed table, The cassette type has second and third engaging portions provided on the cloth feed base, and drive means capable of horizontally reciprocating the third engaging portion provided on the cloth feed base. The cloth holding plate is horizontally engageable and disengageable with the first engaged portion, which is vertically disengageable from the first engaging portion, and the second and third engaging portions. A crump device for a sewing machine is provided, which has first, second and third engaged parts which can be fitted together. It is.

The second and third engaged portions are spaced apart from each other in one direction, and the first engaged portion extends from the second and third engaged portions in the one direction. It is preferable that they are spaced apart in a direction orthogonal to each other.

When the drive means is inoperative, the distance between the second and third engaging portions is narrower than the distance between the second and third engaged portions, and the cassette-type cloth holding plate is supported by the supporting means. The second and third engaged portions are supported by moving the third engaged portion by operating the driving means to widen the distance between the second and third engaging portions. It is preferable to engage the part.

[0012]

When supporting the sewing placing plate on the cloth feed table, the first, second and third engaging portions are engaged with the first, second and third engaging portions, respectively. Since it is supported at three points, it is possible to reliably prevent rattling of the mounting plate to be sewn.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described based on the embodiments shown in the drawings.

FIG. 1 is a perspective view of an embodiment in which the sewing machine clamp device of the present invention is applied to a slacks standup clamp device, FIG. 2 is a top view of the cassette holding plate of the embodiment of FIG. 1, and FIG. It is a perspective view of the principal part of the Example of FIG.

In these drawings, a cloth feed table 4 is provided on the bed 2 of the sewing machine so as to be movable in the XY directions, and a holding frame 6 is fixed to the cloth feed table 4. The presser frame 6 is provided with first and second presser vertical cylinders 8 and 10, and the first presser upper and lower cylinders 8 can move the first presser 14 up and down via a joint member 12. The second presser vertical cylinder 10 can move the second presser 20 up and down via the joint member 18. These joint members 12 and 18 are guided by guide members 22 and 24 fixed to the holding frame 6, respectively. Reference numeral 26 is a throat plate auxiliary cover provided in front of the bed 2.

A cassette holding plate 28 is provided on the left side of the pressing frame 6 so as to be vertically movable by a first cassette cylinder 30. A hole (first engaging portion) 32 is formed near the tip of the cassette holding plate 28. A cassette fixing plate 34 is fixed to the right of the presser frame 6. A second cassette cylinder (driving means) 36 is fixed to the cassette fixing plate 34. A positioning cassette (cassette type cloth holding plate) 38 is arranged below the first and second pressers 14 and 20 after the cloth to be sewn is clamped, and is detachably supported by the cloth feed base 4. .

As shown in FIG. 2, two notches 39 and 42 are formed in the cassette fixing plate 34 on the left and right sides of the second cassette cylinder 36, and the notch 39 (42 Engaging portion) 40 is formed. The rod 36A of the second cassette cylinder 36 is provided in the direction of the notch 42 on the left side, and the engaging piece 44 is fixed to the tip thereof. A semicircular cutout portion (third engagement portion) 46 is formed at the tip of the engagement piece 44. When the second cassette cylinder 36 operates, the engagement piece 44 moves horizontally leftward.

As shown in FIG. 3, the positioning cassette 38 is formed with a holding shaft (first engaged portion) 48 which is engageable with the first engaging portion 32 at the center in the longitudinal direction. On the other hand, a pin (second engaged portion) 50 engageable with the second engaging portion 40 and a pin (third engaged portion) 52 engageable with the third engaging portion 46. Are projected respectively. The second engaged portion 50 and the third engaged portion 52 are arranged apart from each other in the front-rear direction (Y direction) of the sewing machine, and the first engaged portion 48 is the second engaged portion. 50 and the third engaged portion 52 are arranged apart from each other in the left-right direction (X direction) of the sewing machine.

The positioning cassette 38 is also provided with a plurality of toggle clamps 56 for clamping the cloth to be sewn. Further, a positioning guide 58 for positioning the cloth to be sewn and a needle of a sewing machine (not shown) move up and down. A needle drop portion 60 that can penetrate therethrough is formed.

When the distance between the second engaged portion 50 and the third engaged portion 52 of the positioning cassette 38 is W, the distance between the second engaging portion 40 and the third engaging portion 46 is Distance D (see FIG. 2) is smaller than W when the second cassette cylinder 36 is inactive.

To set the product to be sewn using the clamp device having the above-described configuration, first, the line 66 of the front portion 64 of the product (slacks) 62 shown in FIG. 4 is positioned. The front portion 64 is placed on the positioning cassette 38 according to the guide 58, and is fixed to the positioning cassette 38 by the toggle clamp 56.

The positioning cassette 38 is moved below the first and second pressers 14, 20 as shown by the arrow A in FIG. At this time, since the hem portion of the slacks 62 hangs downward from the throat plate auxiliary cover 26, a large load is applied to the positioning cassette 38.

After moving the positioning cassette 38 to the lower side of the presser 14, the second cassette cylinder 36 is operated so that the third engaging portion 46 moves to the left in FIG. 2 together with the third engaged portion 52. The second engaged portion 50 is moved and brought into contact with the second engaging portion 40. Therefore, the positioning cassette 38 is supported at the three points of the first, second and third engaged parts 48, 50 and 52.

Next, the first cassette cylinder 30 is operated to engage the first engaging portion 32 and the first engaged portion 48, so that the positioning cassette 38 is temporarily fixed to the cloth feed table 4. At this time, the second engaged portion 50 is brought into contact with or close to the edge portion 34A of the cassette fixing plate 34, and the third engaged portion 52 and the third engaging portion 46 are arranged. Placed in contact or close proximity.

After supporting the positioning cassette 38, the first and second presser vertical cylinders 8, 10 are simultaneously operated to lower the first and second pressers 14, 20 and press the slacks 62. At this time, the fabric held by the pressers 14 and 20 is the upper part of the slacks 62 in FIG. 4, and the upper edge 67 and the lower part 58 have different material thicknesses, but the two pressers Use of 14 and 20 makes it possible to reliably hold.

After the slacks 62 are pressed by the first and second pressers 14 and 20, the cloth feed table 4 is moved in the XY directions by the XY moving means (not shown), and the needle of the sewing machine is moved up and down. Sew along the stitch line 70 of the upright portion 64.

Since the positioning cassette 38 for the long tubular workpiece as in the present embodiment has an elongated shape, a large load is applied to the positioning cassette 38 as described above, and especially the tip end portion thereof is subjected to a large load. Since a load is applied, rattling easily occurs due to the force and vibration in the direction C in FIG. However, since the clamping device of the present invention supports the positioning cassette 38 on the cloth feed table 4 to be sewn at three points, rattling is surely reduced.

Although the clamp device of the present invention has been described based on the embodiment shown in the drawings, the present invention is not limited to this embodiment and various modifications can be made.

For example, although the semicircular cutouts 40 and 46 are shown as the second and third engagement portions, the second and third engaged portions 50 and 52 such as V-shaped cutout portions are shown. Any shape may be used as long as it can securely hold.

Further, the second engaged portion 50 and the third engaged portion 52 are arranged apart from each other in the front-rear direction (Y direction) of the sewing machine, and the first engaged portion 48 is the second engaged portion. Although an example is shown in which the engaged portion 50 and the third engaged portion 52 are arranged apart from each other in the left-right direction (X direction) of the sewing machine, on the contrary, the second engaged The joint portion 50 and the third engaged portion 52 are arranged apart from each other in the left-right direction (X direction) of the sewing machine, and the first engaged portion 48 is separated from the second engaged portion 50 and the third engaged portion. It may be arranged to be separated from the engaged portion 52 in the front-rear direction (Y direction) of the sewing machine. In this case, it is necessary to change the arrangement of the first, second and third engaging portions 32, 40 and 46 in the same manner.

Further, the embodiment in which the clamp device of the sewing machine of the present invention is applied to the clamp device for slacks standup has been described, but the present invention is not limited to this and can be applied to any sewing work.

[0032]

[Effect of device]

 According to the present invention, there is provided a sewing machine clamp device capable of reliably preventing rattling of a cassette type cloth holding plate.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment in which the clamp device for a sewing machine according to the present invention is applied to a clamp device for slacks erection.

FIG. 2 is a top view of the cassette holding plate of the embodiment of FIG.

FIG. 3 is a perspective view of a main part of the embodiment of FIG.

FIG. 4 is a front view of a product to be sewn which is clamped by the clamping device of the embodiment of FIG.

[Explanation of symbols]

 2 bed 4 cloth feed base 4 cloth feed base for sewing 6 presser frame 8 first presser vertical cylinder 10 second presser vertical cylinder 12,18 joint member 14 first presser 20 second presser 22,24 guide member 26 Needle plate auxiliary cover 28 Cassette holding plate 30 First cassette cylinder 32 Hole (first engaging portion) 34 Cassette fixing plate 34A Edge portion 36 Second cassette cylinder (driving means) 36A Rod 38 Positioning cassette (cassette type cloth) Holding plate) 39, 42 Notch portion 40 Notch portion (second engaging portion) 44 Engaging piece 46 Semicircular notch portion (third engaging portion) 48 Holding shaft (first engaged portion) 50 Pin (second engaged portion) 52 Pin (third engaged portion) 56 Toggle clamp 58 Positioning guide 60 Needle drop portion 62 Sewn product (slacks) 64 Standing portion 66 In 70 stitch line

Claims (3)

[Scope of utility model registration request] 1. A cloth feed table provided on a bed of a sewing machine so as to be movable in XY directions, a cassette type cloth holding plate for holding a cloth to be sewn, and the cassette type cloth holding plate attached to and detached from the cloth feeding table. In a clamp device of a sewing machine having a supporting means for supporting freely, the supporting means includes a first engaging portion provided to be movable up and down with respect to the cloth feed table, Third
And a drive means capable of horizontally reciprocating the third engaging portion provided on the cloth feed base, and the cassette-type cloth holding plate is provided with the first engaging portion. A first engaged portion that can be engaged and disengaged in the vertical direction, and second and third
A clamping device for a sewing machine, comprising: first, second, and third engaged portions that are engageable with and disengageable from the engaging portion in the horizontal direction. 2. The second and third engaged portions are spaced apart in one direction, and the first engaged portion is separated from the second and third engaged portions in the one direction. 2. The clamp device for a sewing machine according to claim 1, wherein the clamp device is spaced apart in a direction orthogonal to the. 3. When the drive means is inoperative, the distance between the second and third engaging portions is narrower than the distance between the second and third engaged portions, and the cassette-type cloth is supported by the supporting means. When the holding plate is supported, the third engaged portion is moved by the operation of the driving means to widen the interval between the second and third engaging portions, and thus the second and third engaged portions are moved. The clamp device for a sewing machine according to claim 1 or 2, wherein the clamp device is engaged with an engaging portion.