JPS6317424Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an attachment that is detachable from a sewing machine and that applies tension when sewing a cylindrical object.

[Conventional technology]

Conventionally, when sewing a cylindrical object using a lockstitch sewing machine, an overlock sewing machine, etc., the cylindrical object was repeatedly pulled and sewn by hand, and then pulled and sewn again.

In some cases, there are fully automated dedicated machines integrated with sewing machines, such as the one disclosed in Japanese Patent Publication No. 55-46755, in which rollers that apply tension to a cylindrical object are moved vertically. Slide it
A means for applying tension and a means for releasing it are provided.

[Problem to be solved]

However, with the above-mentioned dedicated machines, there are problems that the equipment is complicated and costs a lot of money, and that it is difficult to meet the demands for high-mix, low-volume production. Furthermore, since it cannot be easily attached to and removed from an existing sewing machine, there is also the problem that a dedicated sewing machine is required.

Therefore, it can be detached from existing sewing machines and can economically meet the demands of high-mix, low-volume production.
In other words, a manual tensioning device has been long awaited.

However, since there is no such manual tensioning device, the above-mentioned manual work is performed, but manual work requires a great deal of effort and concentration, resulting in great fatigue. There is a problem with that.

Furthermore, if the above-mentioned pulling force is uneven, the thread will break or the stitching will be bent, and when the tension is released, the wrinkles will be uneven and the finish will be poor, so it is necessary to have a high level of skill to do this work. The problem is that it requires

The tension setting device disclosed in Japanese Patent Publication No. 55-46755 mentioned above has problems in that it tends to come off when setting a cylindrical object and that it tends to meander during sewing operations.

[Means for solving problems]

The present invention was devised in view of the above-mentioned problems. After setting a cylindrical object to be sewn onto a plurality of rollers provided on a sewing machine, the rollers are separated and the cylindrical object In a tensioning device for applying tension to a cylindrical object when it is attached to a cylindrical object, a measure is taken in which at least one of the plurality of rollers is a tapered roller with a thick tip.

[Effect]

In the present invention, after the cylindrical object to be sewn is set on a plurality of rollers provided on a sewing machine, the rollers are separated to apply tension to the cylindrical object. In the current tensioning device, at least one of the plurality of rollers is a tapered roller with a thick tip.

Therefore, when setting a cylindrical object, first
If you hang it on the taper roller and then hang it on another roller, the tapered roller has a thick end on the front side, so the cylindrical object will not fall off.

In addition, since conventional rollers are straight rollers, during sewing work, the cylindrical object meandered as it rotated, gradually coming off the tip of the roller, and eventually falling off. According to the present invention, meandering is regulated by the tapered roller having a thick tip, so that it does not come off the roller.

In this manner, in the tensioning device for attaching a cylindrical object according to the present invention, the positional shift of the cylindrical object is controlled by the thick tapered roller both when setting the cylindrical object and during sewing work. Because it is done,
It doesn't come off the roller.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tensioning device for sewing tubular objects according to the present invention will be described in detail below with reference to the drawings.

Fig. 1 is a perspective view of an embodiment in which a tensioning device according to the present invention is attached to a sewing machine, Fig. 2 is a front view of the tensioning device according to the present invention, and Fig. 3 is a bottom plan view of the same.
FIGS. 4 and 5 are explanatory diagrams of the locked recess and the locking release means.

In Figures 1, 2, 3 and 4,
At the back of the sewing machine table 1, attach the base mounting bolt 5.
The base 19 is fixed by the nut 5', and there is a notch in a part of the mounting hole of the base 19.
It can be easily attached and detached by simply tightening or loosening the bolt 5 and nut 5'. A guide case 6 and a guide 6' are fixed in parallel to the center of a base 19, and a slide base 18 moves back and forth within the guide case 6 and guide 6'.

A rear roller adjusting plate 14 and a lower roller adjusting plate 15 are fixed to the base 19.

There is an oblong roller adjustment groove 16' in the center of both adjustment plates, and the rear roller 3 and lower roller 4 attached to this groove can change their positions, and the roller attachment nut 2 can be adjusted at an appropriate position.
It is fixed at 1,21'. When setting a cylindrical object on such a sewing machine, the cylindrical object is first hung on the lower roller 4 and then hung on the front roller 2 and rear roller 3, so that the cylindrical object is placed on the lower roller 4.
The lower roller 4 is a tapered roller with a thick tip to prevent it from falling out. This prevents the cylindrical object from coming off toward the front during sewing work, but if the tapered roller is oriented in only one direction, the cylindrical object will be biased toward the roller adjustment plates 13, 14, and 15. The front roller 2 is made into a tapered roller to prevent the cylindrical object from being biased or meandering.

The mounting structure of each roller is the same for the front roller 2, rear roller 3, and lower roller 4, so to explain the lower roller 4, bearings 23 and 23' are fitted into both ends of the lower roller 4, Therein, the roller shafts 20 are respectively passed through the roller adjustment grooves 16' in the roller adjustment plate 15 and secured in position with roller mounting nuts 21'. At one end of the slide table 18,
The front roller adjustment plate 13 is connected to the front roller adjustment bolt 2
It is attached via 2.

There is an oblong roller adjustment groove 16' in the center of the front roller adjustment plate 13, which allows the height of the front roller 2 to be adjusted perpendicular to the slide base 18, or
The front roller adjustment bolt 22 can be used as a fulcrum to fix the front roller at different angles.

Below, means for applying tension to, holding, and releasing tension on the cylindrical object to be sewn will be explained.

As shown in FIG. 4, a slit 31 is provided at a predetermined position on the side edge of the slide base 18, and the lever 25, which can move up and down using the pin 26 as a fulcrum, is guided so that its protrusion is inserted into the slit 31. It is attached to case 6.

Further, the lever 25 is supported by a lever guide 30, and the lever guide 30 is fixed to the guide case 6 by a lever guide set screw 29.

The lever 25 and the base 19 are subjected to tensile force by a spring 27 and press against the slide base 18. Only when the protruding piece of the lever 25 is inserted into the slit 31, the slide base 18 is not pressed, so that tension is applied and maintained.

A chain 28 is suspended from the other end of the lever 25 and is connected to a foot pedal (not shown) under the sewing machine table. By stepping on the foot pedal, the lever 25 is moved by the tensile force of the spring 27. The slit 31 is pushed down against the
The protruding piece of the lever 25 that was inserted into the lever 25 comes off,
The tension on the slide table 18 is released.

In addition to the above, instead of the plurality of slits 31 provided on the side edges of the slide table 18 described above, as shown in FIG. Lever 2
5, install the piston pin 3 in the guide case 6.
2 may be provided so as to be elastically biased upward by a spring 34.

In this case, during sewing work, the slide table 1
8 to the rear to shorten the distance between the rollers, first hang the cylindrical object on the lower roller 4, then hang it on the front roller 2 and rear roller 3, and then set the cylindrical object on the rollers. Slide the slide table 18 forward and insert the tip of the piston pin 32 into the stop hole 36 of the slide table 18 at a position where a predetermined tension is applied when sewing.
and hold this tension.

When the sewing operation is completed, the piston pin 32 is moved against the elastic biasing force of the spring 34.
is pushed down by a driving means such as an electromagnetic solenoid or an electromagnet, and the tip of the piston pin 32 is removed from the stop hole 36. As a result, the slide base 18 becomes slidable, and the tension applied to the material to be sewn is released. It will be lifted.

In this way, sewing operations can be performed continuously.

Furthermore, cylindrical objects of various sizes can be set using the following method, and sewing operations can be performed continuously and smoothly.

First, when sewing the rubber knitting of the cuffs of a small cylindrical object, such as a child's training shirt, a sewing machine tube cover with a roller, which is already under application for utility model registration, is used. In Fig. 1, tension is applied by the cylinder covers C and C', and frictional resistance is reduced by the rotation of the rollers to perform sewing smoothly.

Next, when sewing a larger cylindrical object, the front roller 2 is attached to the front roller adjusting plate 13 in advance.
Using the front roller adjustment bolt 22 as a fulcrum, the front roller adjustment plate 13 is fixed at a slight inclination, and a cylindrical object is placed over the front roller 2 and the cylinder cover roller C. stand 18
Slide it to apply the specified tension and hold it to sew. At this time, since the front roller 2 is a tapered roller and the lower roller 4 is a tapered roller with a thick tip, the cylindrical object does not meander, and the work is smooth and the finish is good.

Next, when sewing a larger cylindrical object, the front roller 2 and rear roller 3 are covered with the cylindrical object and set.

When sewing a cylindrical object of the largest size, the front roller 2, the rear roller 3, and the lower roller 4 are covered with the cylindrical object to be sewn and set. At this time, since a tapered roller was used as the lower roller 4, when the cylindrical object was first placed on the lower roller 4 and pulled to cover the front roller 2 and the rear roller 3, the cylindrical object fell off. can be prevented.

Here, the lower roller 4 is a tapered roller with a thick tip, but any roller may be a tapered roller with a thick tip. In any case, if the first roller applied when setting the cylindrical object is a tapered roller with a thick tip, this effect can be obtained.

In this way, sewing operations on cylindrical objects of various sizes can be carried out continuously and smoothly.

As described above, according to the tensioning device for sewing cylindrical objects according to the present invention, since the base is provided with means for attaching and detaching from the sewing machine, the tensioning device according to the present invention can be easily attached to a conventional sewing machine. It is removable and has the advantage that cylindrical objects can be easily sewn using a conventional sewing machine.

Furthermore, since one of the rollers is mounted on a slide base that is horizontally slidable with respect to the base, the spacing between the rollers can be expanded and contracted, making it possible to easily set and remove cylindrical objects. It is ideal for processing a wide variety of cylindrical objects of various diameters in small quantities.

Further, the slide base is provided with a locking recess, and the base is provided with a locking rod that is elastically biased upwardly by a spring and can freely move in and out of the locking recess. When it slides, the locking rod enters the locking recess, thereby stopping the movement of the slide table and holding the cylindrical object with the desired tension. There is no need for this process, and the finish is also good.

Further, since a lock release means is provided that pushes down the lock rod against the elastic biasing force, the tension can be released at any time by the lock release means when the cylindrical object is removed. be.

In addition, since no power sources such as springs or electric cylinders are required whether the tension is being applied or released, the running cost of operating the tensioning device can be reduced, resulting in energy savings. .

In addition, since the base is equipped with a means for attaching and detaching the tensioning device to a sewing machine, the tensioning device can be easily attached and detached from a conventional sewing machine, making it possible to sew cylindrical objects using an existing sewing machine. Since the tensioning device is not equipped with a driving means, it has the effect of making the tensioning device inexpensive.

Therefore, it is possible to realize a manual tensioning device at a low cost, which is detachable from an existing sewing machine and can easily meet the demands for high-mix, low-volume production.

〔effect〕

As described above, according to the tensioning device for attaching cylindrical objects according to the present invention, after setting the cylindrical objects to be sewn on the plurality of rollers provided on the sewing machine, the rollers are separated from each other. In the tensioning device for applying tension to the cylindrical object when the cylindrical object is attached, at least one of the plurality of rollers is a tapered roller with a thick tip, so that the cylindrical object can be applied to the tensioning device of the sewing machine. Both when setting and during sewing work, the tapered roller with a thick tip prevents the cylindrical object from meandering and comes off the roller, making sewing the cylindrical object extremely comfortable, reliable, and smooth. This has the effect of being able to do this.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment in which a tensioning device according to the present invention is attached to a sewing machine, Fig. 2 is a front view of the tensioning device according to the present invention, and Fig. 3 is a bottom plan view of the same.
FIGS. 4 and 5 are explanatory diagrams of the locked recess and the locking release means. A... Sewing machine, C, C'... Tube cover roller,
1... Sewing machine table, 2... Front roller, 3...
...Rear roller, 4...Lower roller, 5...Base mounting bolt, 5'...Base mounting nut, 6
...Guide case, 6'...Guide, 18...Slide stand, 19...Base, 25...Lever, 26
...Pin, 27...Spring, 28...Chain, 3
1...Slit, 32...Piston pin, 34...
...Spring, 36...Slide base hole.

Claims (1)

[Scope of utility model registration request] A tensioning device for applying tension to the cylindrical object by setting the cylindrical object to be sewn onto a plurality of rollers provided on a sewing machine, and then separating the rollers to apply tension to the cylindrical object, A tensioning device for when a cylindrical object is attached, characterized in that at least one of the plurality of rollers is a tapered roller with a thick tip.