JPS5945396B2 - Cloth decurling device for sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a can decurling device for a sewing machine that guides the can to a sewing machine sewing section after removing curls generated on the edge of the can before sewing the can.

Conventionally, in order to make a large quantity of sleeves such as sweaters knitted with wool, a single piece of knitted fabric is folded back, both ends are overlapped, and the ends are sewn with a sewing machine.

However, due to the nature of the knitted material, the ends always curl to the back side of the knitted material.

Conventionally, the curls were pressed down by hand to stretch and flatten them before being guided to the sewing section of the sewing machine.

As a result, the degree of curl removal becomes uneven and the knitted fabric is stretched excessively, making it difficult to form good seams and reducing work efficiency.

This invention was made to eliminate such conventional drawbacks, and provides a can curl removal device for a sewing machine that can completely remove curls from cans and also remove curls from various types of cans. is to provide.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, reference numerals 1 and 2 refer to a pair of decurling bodies, 4,
Reference numeral 5 denotes an inclined part formed at the tip of the curl remover 1, 2, which is inclined in a direction away from the can edge Wa from the front to the front in the feeding direction of the city W (see Fig. 2) and away from the can edge Wa. .

6 and 7 are front end portions 4a of the inclined portion 4°5 in the cloth feeding direction;
5a is a convex portion that intersects horizontally with the can feeding direction in front of the inclined portions 4, 5 in the can feeding direction and projects in a direction away from the can edges Wa, Wa; 8, 9 are rear end portions of the inclined portions 4, 5; 4b,
A reverse slope portion formed symmetrically with the slope portions 5, 5 above with respect to a line parallel to the can feeding direction passing through 5b.

The edges of the inclined parts 4, 5 and convex parts 6, 7 are covered with cloth W, W, respectively.
slope T inclined in the direction of the curl.

T is formed.

Reference numeral 10 denotes a receiving plate which is disposed between the curl removing bodies 1 and 2 and whose middle part is rotatably supported on the curl removing body 1 so as to be able to come into contact with and separate from the tips of both curl removing bodies, and the curl removing body is attached to the tip of the receiving plate. Convex portion 11 that is one size larger than convex portions 6 and 7 of 1 and 2 and inclined portion 1
2 and a reverse slope portion 13.

Reference numeral 14 and 15 denote a first elastic body that has an elastic force that always presses the tip of the curl remover 2 toward the receiving plate 10 and the tip of the receiver plate 10 toward the curl remover 1, and is connected to the curl remover 2 and the receiver. The plate 10 is interposed between the receiving plate 10 and the curl remover 1.

16 is a cylindrical body supported on a support rod 18 as a machine frame fixed to the bed surface 17 so that the lower end opening 16a is located above the rear end of the curl removal body 2; 18 is the upper end opening of the planar body 16; A hollow pressure adjusting screw screwed into the portion 16b, 19 a shaft rod loosely fitted into the hollow portion 18a of the pressure adjusting screw 18 and the joint 16, 20 a presser fixed to the lower end of the shaft rod 19, and a curl It acts to rotate the removing body 2 against the first elastic body.

21 is a second elastic body that is interposed between the upper end of the suppressor 20 and the lower end of the pressure adjustment screw 18 and always acts in a direction to press the suppressor 20 above the curl removal body 2; 18
An elastic body 21 that acts on the presser 20 by rotating the
The zero elastic force can be varied, thereby making it possible to adjust the clamping pressure with which the curl removers 1, 2 and the receiving plate 10 clamp the cloths W, W.

This elastic force is weaker than the elastic force of the first elastic bodies 14 and 15, and therefore the suppressor 20 is raised by the restoring force of the first elastic bodies 14 and 15 of the curl removing body 2 and positioned at a predetermined height. are doing.

Reference numeral 22 denotes a stopper rotatably supported on a support 23 fixed on the bed 17, the tip 22a contacts the upper end of the shaft 19, and the rear end 22b is operated manually (for example, in conjunction with presser foot lifting lever operation). ) to rotate the stopper 22 counterclockwise in the figure.

Next, the operation of this invention will be described.

First, from the state shown in FIG. 3, when the lever 24 is actuated upward, the stopper 22 rotates counterclockwise and presses the upper end of the shaft rod 19, causing the pusher 20 to descend as shown in FIG.
The curl removing body 2 is rotated clockwise about the shaft 3 against the elastic body 14.

Along with this, the receiving plate 10 also rotates clockwise against the elastic body 15, and the tips of the curl removing bodies 1, 2 and the receiving plate 10 move to the fourth position.
As shown in the figure, the can W is opened wide enough to allow W to be easily guided between these two pieces. The cans W are polymerized with their curls K facing downward.

Then, while flattening the curls K of the upper cloth W, the can edge is aligned with the sloped part 5 and the reverse sloped part 9 of the curl removing body 2.
At the same time, the lower ff1W is also guided between the curl remover 2 and the receiving plate 10 so that the curls K are flattened, and the can edge Wa is guided between the inclined part 4 of the curl remover 1 and the reversely inclined part. 8, and guide it between the receiving plate 10 and the curl remover 1 so that it comes to the intersection of the numbers 8 and 8 (see FIG. 2).

Then, when the operation of the shield 24 is released, the suppressor 20 is
The counterclockwise rotation of the receiving plate 10 and curl remover 2 due to the restoring force of the elastic bodies 14 and 15 causes them to move upward, and the shaft 19 also rises, as shown in FIG. are returned to their original positions, and in this state, iw and w are clamped by the elastic force of the elastic bodies 14 and 15.

Then, due to the thickness of SW and W, curl removal bodies 1 and 2 are removed.
There may be cases where it is desired to set the optimal curl removal state by changing the clamping pressure of gradually increases and becomes stronger than the elastic force of the first elastic body 14.15, and finally the suppressor 20 moves the curl remover 1 and the receiving plate 10 slightly clockwise against the first elastic body 14.15. As the curl remover rotates, the clamping pressure acting on the tips of the curl removers 1 and 2 decreases.

Moreover, if the pressure adjustment screw 18 is rotated in the opposite direction, the second elastic body 2
1 first expands and its elastic force gradually weakens, so that the receiving plate 10 and the curl remover 2 rotate counterclockwise due to the elastic force of the first elastic body 14, 15, and the curl remover 1 , 2 increases.

After adjusting the clamping pressure of the curl removers 1 and 2 to the optimum state using the pressure adjustment screw 18 according to the thickness of the cans IW and W and the type of can base, when the sewing machine is started, first the can W is It is sent in the direction of arrow Y.

In the following description, the effects occurring on the upper can W and the lower can W are the same, so a description of the lower f5W will be omitted.

The can W is fed, and the curl K generated at the end of the can is removed by the curl remover 2.
When approaching the convex part 7 of the needle, since the convex part 7 has a needle face T inclined in the direction of curling, the needle smoothly slides onto the convex part 7 when curling.

Since the tip of the convex part 7 extends in front of the inclined part 5 in the can feeding direction, one part of the large curl is pushed out and curled as it passes over the convex part 7 as shown in Fig. 2. 1 part decreases.

Here, since the convex part 7 and the receiving plate 10 are configured to contact only at the lower surface of the convex part 7, the clamping pressure of the can W between the receiving plate 10 and the curl removal plate 2 is the strongest at the convex part 7. .

Therefore, a force is applied to the can W passing under the convex portion 7 to draw the city W between the inclined portions 5 and 12 formed on the curl removal plate 2 and the receiving plate 10.

For curls in which 1 is reduced for large curls and 2 for small curls, the curl gradually decreases by passing over the slope part 5, and finally reaches the rear end 5b of the slope part 5 to the reverse slope part 9. The curl remover 2 and the receiving plate 1 are guided while being regulated.
The curl K is completely removed and the can edge Wa is pressed flat.

The can edge Wa, which has become flat in this manner, is guided to the sewing section below the presser foot 25, where a stitch is formed by the needle N.

As described above, according to the present invention, the convex portion first removes the larger curls, then the inclined portion gradually removes the smaller curls, and finally the curl remover and the receiver. Curls are removed by the clamping pressure between the cans and the seams, resulting in a sewn product with beautiful seams. Moreover, there is no need to manually flatten the curls on the cans.
This has the effect of greatly improving workability and uniformly removing curls.

In addition, the clamping pressure of the curl removal plate can be set to the optimum curl removal state depending on the thickness of the can or the type of fabric, so it is possible to remove curls from cans of all types or thickness. This has the effect of widening the range of use.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of the present invention, FIG. 2 is a partial plan view showing how the invention is used, and FIGS. 3 and 4 are partially sectional front views showing how the invention is used. 1.2... Curling removal body, 4, 5... Inclined part, 6°7... Convex part, 10... Receiving plate, 14.15... First
Elastic body, 18... Pressure adjustment screw, 20... Presser, 21
...Second elastic body.

Claims (1)

[Scope of Claims] 1. In a sewing machine that sews a curled part of a workpiece with a curled edge along the curled edge, the sewing machine sews the curled part of a workpiece with a curled edge along the curled edge, and the sewing machine moves away from the edge of the fabric from the front toward the front in the feed direction of the workpiece. An inclined part that is inclined in the direction of the can, and an end force on the front side of the inclined part of the can in the can feeding direction. Two sheets, each of which has a convex portion, an inclined portion, and a slope formed on the edge of the convex portion and inclined from one of the edges toward the west in the direction of the curl of the can, which are arranged opposite each other vertically. The curl remover is made of a flat plate, and the middle part of the upper plate is rotatably supported by the middle part of the lower plate so that the leading end can be moved toward and away from the presser foot. , a receiving plate which is disposed between both the curl removing bodies and whose intermediate portion is rotatably supported on the lower curl removing body so that the tip comes into contact with and separates from the tip of both the curl removing bodies; an elastic body that is interposed between the receiving plates and acts so that both the curl removing bodies and the tip of the receiving plate come into contact with each other, and an upper elastic body that rotates the curl removing body against the first elastic body. A presser facing the rear end and supported in a reciprocating manner on the machine frame, a pressure regulating screw screwed into the machine frame so as to be rotatable vertically, and a pressure regulating screw interposed between the pressure regulating screw and the presser regulating the pressure. A second elastic body having elasticity that rotates the upper curl removal body against the first elastic body in relation to the rotation of the screw. A curl removal device for a sewing machine.