JPS5846793Y2 - Fabric guide device in blind stitch sewing machine - Google Patents

Description

[Detailed description of the invention] This invention mainly relates to a cloth guide device in a blindstitch sewing machine.

With conventional blind stitch sewing machines, for example, skirts,
When hemming the hem of pants, etc., the fabric tends to be fed unevenly, resulting in untidy and uneven stitches.

As a means to prevent these problems, a binder (fabric guiding device) has been proposed that slides and guides the folded portion of the sewing material while maintaining the width of the folded portion.

This binder has the effect of stabilizing the hem hem work by ensuring a constant width at the folded part, but in the case of bag-shaped items, the first sewn part is integrated, so that part is bound by the binder. For example, there was a problem in that the binder got caught in the binder and the work could not be carried out unless it was removed from the binder, leaving about 10 cm of space at the seam between the beginning and the end of sewing, for example.

This idea was made in view of the above circumstances, and its purpose is to be able to sew in one step, without being affected by the seam starting point, even when sewing the seam, such as when sewing hems. It is an object of the present invention to provide a cloth guiding device that can be easily removed and automatically removed from the object to be sewn when sewing is finished.

Hereinafter, details will be explained based on drawings showing an embodiment of this invention.

In the figure, reference numeral 1 denotes a binder body, and this binder body 1 has a first guide groove 3 formed inside a thin plate material 2 such as a metal plate folded into a U-shape, and an outside of this first guide groove 3. A mounting piece 4 protrudes from the bottom 3a in the opposite direction to the first guide groove 3, and a mounting piece 4 extends along one side wall of the first guide groove 3 (the upper outer wall surface in the illustration and in the attached state) in the direction of the opening 3b. It is set as the structure which each has the support piece 5 protrudingly provided in the.

Further, in the illustrated example, the mounting piece 4 is attached to a bracket 7 by screws 6, and this bracket 7 is attached to a predetermined position corresponding to the sewing machine needle and cloth feeding device of the sewing machine body (not shown). It will be done.

A rotating binder 9 is rotatably attached to the support piece 5 of the binder body 1 via a fulcrum screw 8.

This rotating binder 9 has a second guide groove 11 formed inside a thin plate material 10 such as a metal plate by folding it back into a U-shape;
The inner bottom 11 a of the second guide groove 11 faces the inner bottom 3C of the first guide groove 3, and the pivot member 12 is rotatably attached to the support piece 5 by the fulcrum screw 8.
It is said that it has the structure which has each.

Further, as shown in the figure, a support piece 5 of the binder main body 1 is provided.
A spring mounting shaft 13.14 is provided at an appropriate position on the swinging member 12 of the swinging binder 9, and a spring 15 is stretched around the spring mounting shaft 13.14. Guide groove 3 and second guide groove 11
are positioned so as to face each other, and this position is maintained by being biased by a spring 15 in the direction of arrow A.

Furthermore, when the rotating binder 9 is rotated in the direction indicated by the arrow against the biasing force of the spring 15, it will not cross the dead center (i.e., the point where the spring mounting shaft 13, 14 and the fulcrum screw 8 are in a straight line). As a result, as shown in FIG. 3, the first guide groove 3 and the second guide groove 11 are separated in opposite directions, and this position is maintained by being urged by the spring 15 in the direction of the arrow.

In the illustrated embodiment, when in the state shown in FIG. 2, portions A of the thin plates 2 and 10 come into contact to restrict rotation in the direction of arrow A, and the state shown in FIG. The structure is such that the rotation in the direction of the arrow is limited by the contact (becomes a free length) of the wires of the spring 15 when the spring 15 is in the position shown in FIG. Good too.

In addition, in the illustrated example, as shown in FIG. 3, the thin plate material 2,
Projecting pieces 2a and 10a are formed in a part of the thin plate material 1.
The projecting piece 10a of the thin plate 10 is formed to be large so as to fit along the outer wall of the first guide groove 3, and The projecting piece 2a may be formed long and wide so as to come into contact with the inner bottom 11a of the second guide groove 11.

In addition, the reference numeral 21 is the object to be sewn, and 21a is the edge portion (remaining portion at the beginning of sewing) thereof.

The operation of this device configured as described above will be explained below.

First, the rotating binder 9 is rotated in the direction of the arrow to bring it into the state shown in FIG.
1 is inserted into the first guide groove 3 and brought into contact with the inner bottom portion 3C, and the rotating binder 9 is inserted between the folded portions of the hem of the article to be sewn 21.

By this operation, the workpiece 21 is moved as shown by the chain line in FIG.
will be set correctly.

The workpiece 21 correctly set in this manner is movable in the cloth feeding direction (including the opposite direction), but movement is restricted in the width direction and the vertical direction.

Therefore, it is possible to set the sewing object 21 correctly and to move it accurately without having to make any special adjustments to the folded part of the hem of the sewing object 21.

Once this set is complete, start the sewing machine.

The article to be sewn 21 is moved in the cloth feeding direction by the cloth feeding device while maintaining the width of the folded portion of the hem by the cloth guiding device of the present invention, and then a predetermined blind stitch is performed by the sewing machine needle.

FIG. 4 shows the state during blind stitching, in which the workpiece 9I21 is moved in circulation from the bottom to the top in the figure, and the blind stitch is performed by a sewing machine needle (not shown) provided near the top of the binder main body 10 in the figure. is in progress.

In this figure, the already sewn product (extra part at the beginning of sewing) 21a of the workpiece 21 has circulated and returned to the vicinity of the binder body 1, and the already sewn product (extra part at the beginning of sewing) 21a and The remaining part 21b which is being sewn is left unsewn.

Blind stitching continues from this state, and the sewing material e721
The already sewn product (remaining part at the beginning of sewing) 21a is attached to the rotating binder 9
When it abuts against the thin plate material 10, the surface edge made portion 21H pushes the thin plate material 10, and the rotating binder 9 is rotated in the direction of the arrow about the fulcrum screw 8 against the biasing force of the spring 15. That's why.

Then, the rotating binder 9 is automatically rotated to the position shown by the chain line by the spring 15 and the edge sewing part 21a, and is removed from the folded part of the sewing material e721, and hem hem hem sewing continues.

By the way, after the face edge forming part 21a abuts against the rotating binder 9, there is no member to restrict leftward movement of the sewing material e721, but as shown in FIG. The part that is attached is integrated by sewing, and by slightly pushing it against the inner bottom 3C of the first guide groove 3,
Continue with the remaining part (approximately 10 cm as mentioned above)
can be sewn accurately in one step.

When one round of sewing is completed, the workpiece 21 is taken out from the first guide groove 3 and is ready for the next operation.

As described in detail above, this invention improves the efficiency of sewing work because it can be sewn in one step without being affected by the hem hem stitching, etc., and the first guide groove The second guide groove restricts movement in directions other than the cloth feeding direction to enable accurate cloth feeding, provides a good finish, and has excellent effects such as simple operation and component configuration.

[Brief Description of the Drawings] Fig. 1 is a front view showing an embodiment of this invention, Fig. 2 is a perspective view thereof, Fig. 3 is a perspective view showing the rotating binder in an open state, and Fig. 4 is a front view showing an embodiment of the invention. It is a perspective view explaining an example of use. 1...Binder body, 3...First guide groove, 9...Swivel binder, 11...Second guide groove, 15...・Spring, 21...
...Sewn object, 21a...Face edge sewing part.

Claims (1)

[Scope of utility model registration request] A binder body having a first guide groove in which the leading end of the workpiece is slidably guided; and a binder body that is rotatably attached to the binder body in the feeding direction of the workpiece and that slides and guides the folded part of the workpiece. The present invention is characterized by comprising a rotating binder having a second guide groove formed therein, and a spring regulating the rotation of the rotating binder and assisting the rotation of the rotating binder by pressing the already sewn portion of the workpiece. Fabric guide device for blind stitch sewing machines.