JPS5830058Y2 - Support device for sewn workpieces - Google Patents

Description

[Detailed description of the invention] This invention is a support device for seam allowance workpieces, especially in sewing machine operations where multiple workpieces are overlapped and sewn together. The present invention relates to an improvement in a workpiece support device that holds cloth layers in a stacked manner and applies tension to resist the cloth feed of a sewing machine.

Various technical means are already known for devices for imparting tension to seam allowance workpieces of this type.

By the way, examples of such prior art include those that use a weight as a tensioning means and those that use power control means using pneumatic pressure or an electric motor, but in both cases, the equipment is large and the installation cost is high. It takes a lot of

The purpose of the present invention is to solve this problem by providing the same tensioning effect using a device that is much simpler than those of the prior art.

To explain with reference to the figure, a workpiece cloth 4, which is sewn with a needle 2 of a sewing machine 1 and which has a certain continuous sewing length, such as pants, is guided by a guide 3 and is sewn by a sewing machine cloth feed mechanism (not shown). is sent to the left in the figure.

Means is provided on the right side of the table 16 for clamping the end of the workpiece cloth 4 and applying tension in a direction against cloth feeding.

That is, the clamper 5, which clamps the end of the workpiece cloth 4 with elasticity, returns to the winder 8 via the stopper 6 by the string 9.
is combined with

The winder 8 elastically winds the string 9 and applies an acting force to pull the clamper 5. When the workpiece cloth 4 is moved to the left by the sewing machine cloth feed, the clamper 5 uses the pullback elasticity of the winder 8 to force the workpiece cloth to be pulled. Add tension to 4.

Then, as the relative advances and the clamper 5 approaches the guide 3,
The knob 5a of the clamper 5 abuts against a release stopper 10 mounted near the guide 3, and the clamper 5 releases the workpiece cloth 4 from being clamped.

The return stopper 6 supported by the screw 7 on the table 16 is
This is a stopper that sets the return position when the clamper 5 releases the cloth end and returns to the right by the pullback elasticity of the winder 8, making it easy to set the start of work with the next new workpiece cloth.

Describing the details of the winder 8 with reference to FIGS. 2 and 3, the end of the bracket 19, which is attached like a so-called shako vise, is bent by tightening the heir 18 on the table 16, and the screw 13 is inserted into the end of the bracket 19. The shaft 11 is fixed by
A bobbin 17 is rotatably supported on the top.

The string 9 is wound around the circumferential groove 17 a of the bobbin 17 with its end fixed, and the spring 15 is inserted into a recess 17 b formed on one side of the string and closed by the cover 12 .
It accommodates.

The snap 1 supported on the shaft 11 within the recess 17b
4 prevents the bobbin 17 from being removed, and the spring 1
Reference numeral 5 is a spring-shaped one, and each winding end is supported on the bobbin-side inner circumferential surface in the recess 17b and the shaft 11, and the direction of elasticity is oriented so as to rotate the bobbin 17 clockwise as shown in FIG. Set.

The above structure is used, and its usage is to set the sewing machine 1 to the initial sewing start position of the workpiece cloth 4 as usual, then puncture the first needle to prevent the cloth 4 from shifting as necessary, and then is clamped by clamper 5.

At this time, the clamper 5 is in a state where the string 9 is pulled out against the restoring rotational force of the winder 8, and the workpiece cloth 4 is given tension by the biasing force of the spring 15.

Then, when the sewing machine 1 is operated, the workpiece cloth 4 is sent to the left in FIG. 1, and the string 9 is pulled out from the winder 8.

By touching the knob 5a of the clamper 5 against the release stopper 10 near the end of the hemline to release the clamping of the cloth end, the clamper 5 is returned by the restoring force of the spring 15 and is pulled back until it abuts against the stopper 6.

While the clamper 5 grips the fabric 4 to be processed, tension is applied by spring force, and since the ends of the stitches are clamped in a state where multiple pieces of fabric are overlapped, the clamper 5 holds the fabric 4 to be processed. ,
Provides the effect of suppressing vertical cloth displacement.

In addition, in the above, the strength of the tension imparting action of the winder 8 on the workpiece cloth 4 can be adjusted; that is, by loosening the screw 18, gripping the bobbin 17, and rotating it to either side. This can be achieved by tightening the screw 13 at the required restoring force.

As shown in the above, the present invention is extremely convenient in practical use because it has an extremely simple device-like configuration and can achieve the same effect as a similar tensioning device using a complicated device.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a sewing machine implementing the proposed device;
The figure is a partially sectional plan view of the main part, and FIG. 3 is a partially sectional front view of the main part. 1: sewing machine, 2: needle, 4: workpiece cloth, 5: clamper, 5
a: Clamper knob, 6: Return stopper, 8: Winder, 9: String, 10: Release stopper, 11: Shaft, 13:
(Set) Screw, 14: Clip, 15: (Spring)
Spring, 16: table, 17: bobbin, 17a: circumferential groove, 17b: recess, 18: legitimate child, 19 nib bracket.

Claims (1)

[Scope of utility model registration request] The sewing or terminal end of the workpiece cloth to be sewn by the sewing machine is clamped by a clamper, and an urging force in a direction that opposes the cloth feed of the sewing machine is transmitted to the clamper via a string to apply tension to the workpiece cloth. In the support device for the seam allowance workpiece to be provided, the bobbin is pivotally supported by a shaft that is fixedly supported on a bracket that is attached to the table of the sewing machine, and the bobbin is mounted in a recess formed on one side of the bobbin. A spring-like spring is housed by fixing both winding ends to the inner circumferential surface and the shaft, and one end of the string is fixed and wound to the outer circumferential groove of the bobbin, and the spring is fixed to the clamper. A supporting device characterized in that it imparts tension to the fabric to be processed by transmitting the restoring elasticity of the fabric.