JP2565768Y2 - Tension rollers for hosiery sewing machines - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension roller for a hosiery sewing machine used for a swinging sewing machine drive section of a sewing machine such as a pantyhose.

[0002]

2. Description of the Related Art A pantyhose in which a panty portion and a stocking portion are integrated is generally manufactured as follows. That is, first, using a stocking knitting machine, two cylindrical bodies in which a portion corresponding to a panty portion and a portion corresponding to a toe portion are thick are knitted. Next, after a portion corresponding to the toe portion of the tubular body is sewn using a machine such as a toe closer, two tubular bodies are overlapped, and the two tubular bodies are stacked using a line closer or the like shown in FIG.
The cloths inside the overlapped tubular body 1 are cut and sewn. Then, a rubber band is sewn to the upper end opening of the sewn semi-finished product to form a waist rubber portion, and a pantyhose can be obtained.

The operation of the line closer will be described in more detail. First, the pantyhose 1 is inserted into the clamp 15 of the line closer at the position A.
Next, at the positions B to C, the inserted pantyhose 1 is automatically cut by scissors along the broken line P. Then, the clamp 15 is opened while moving from the position C to the position D, and at the position from D to E, the swinging machine 5 swings as shown by arrows R and T to cut the cut portion (curve P). Suture. In the drawing, reference numeral 6 denotes a swing center axis of the swing sewing machine 5 when swinging in the direction of the arrow R. The drive section of the oscillating sewing machine 5 is usually configured as shown in FIG. That is, the swing sewing machine 5 is mounted on the turntable 2 via the sewing machine mounting base 7, and the motor 3 is fixed below the turntable 2, and the V-belt 4
Through the swinging sewing machine 5. A tension roller 9 is attached to the lower surface of the sewing machine mount 7 via a tension roller bracket 8 so as to contact the rear surface of the V-belt 4. A constant tension is applied to the V belt 4 by the tension roller 9,
The rotation is transmitted from the motor 3 to the swing sewing machine 5 with high accuracy. The swinging machine 5 is driven by swinging the sewing machine mount 7 as shown by arrows R and T (the swinging means is not shown).
In the figure, reference numeral 10 denotes an oscillating sewing machine 5 for oscillating in the direction of arrow T.
Is the swing center axis.

[0004]

However, in the above structure, the motor 3 is fixed, but the swinging sewing machine 5 swings along the suturing line. Moves, and the V-belt 4 moves accordingly. If the driving is continued in such a state, the V-belt 4 is twisted or the corner of the V-belt 4 continues to rotate while being in contact with the surface of the tension roller 9 as shown in FIG. Will wear out. Furthermore, the V-belt 4 is too close to the tension roller bracket 8 side and comes into contact with it, so that the V-belt 4 is worn out and must be replaced in a short time. Further, when the V-belt 4 is worn, the tension changes, and the rotation of the motor cannot be transmitted to the swinging sewing machine 5 accurately, so that the rotation speed of the sewing machine 5 varies. As a result, a problem arises in that the seams are not constant and the quality is reduced.

The present invention has been made in view of such circumstances, and a tension roller for a hosiery sewing machine capable of producing a hosiery such as a pantyhose with stable quality while suppressing wear of the V-belt. The purpose is to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, a tension roller for a hosiery sewing machine according to the present invention is a tension roller used for a swinging sewing machine driving part of a hosiery sewing machine, wherein both ends of the tension roller are used. From the center to the central part.

[0007]

In other words, the tension roller for the hosiery sewing machine of the present invention is formed in a substantially drum shape with a gradually decreasing diameter from both ends toward the center. For this reason, when this tension roller is incorporated in a conventional sewing machine, the V-belt surface does not always contact the roller surface uniformly and does not wear in a short time. Further, since the V-belt does not cause extreme wear, the rotation speed of the sewing machine driven via the V-belt is stabilized.

Next, the present invention will be described in detail based on embodiments.

[0009]

FIG. 1 is a perspective view showing an embodiment of a tension roller for a hosiery sewing machine according to the present invention. The tension roller 10 has a gradually decreasing diameter from both ends toward the center and has a substantially drum shape as a whole.

The ratio of the largest diameter A at both ends of the tension roller 10 to the smallest diameter B at the center is determined by the tension roller 1
A: B = 20: 16 to 20:19, depending on the length of 0
Is preferably set in the range. That is, the largest diameter A
If the ratio between the maximum diameter B and the minimum diameter B is too large, the contact portion between the V belt and the tension roller is biased toward the center, and the durability of the tension roller itself decreases. If the ratio is too small, it is difficult to swing the V-belt in a stable state because the shape is similar to that of the conventional tension roller.

Therefore, the tension roller 10
When the sewing machine 5 is incorporated into a conventional sewing machine as shown in FIG. 2, the tension roller 10 is formed in a substantially drum shape.
Moves in a state in which the back surface of the roller contacts the outer peripheral surface of the tension roller 10 uniformly. Therefore, as shown in FIG.
Only the rear corner of the belt 4 abuts on the tension roller 10 and only a part of the belt 4 is not worn. In addition, it is possible to suppress a variation in the rotation speed of the sewing machine 5 due to the wear of the V-belt 4.

In the above embodiment, a low friction member such as a fluororesin is applied to the surface of the tension roller 10 to impart lubricity to the surface, thereby further reducing the degree of wear of the V-belt 4. be able to.

The tension roller 10 can be used not only for a hosiery sewing machine but also for a tension roller of various driving units in which an object to be driven swings.

[0014]

As described above, the tension roller for a hosiery sewing machine according to the present invention is formed in a substantially drum shape with a gradually decreasing diameter from both ends toward the center. For this reason,
When this tension roller is incorporated into a conventional sewing machine,
The back surface of the belt does not evenly contact the roller surface and wear in a short time. Therefore, the durability of the V-belt is improved. Further, since the V-belt does not cause extreme wear, the rotation speed of the sewing machine is stabilized. Therefore, the socks can be stitched stably, and a high-quality one can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a tension roller for a hosiery sewing machine of the present invention.

FIG. 2 is an explanatory view of a conventional method of manufacturing pantyhose.

FIG. 3 is a perspective view of a conventional pantyhose sewing machine.

FIG. 4 is a perspective view showing a conventional tension roller for a pantyhose sewing machine;

[Explanation of symbols]

 10 tension roller

Claims (1)

(57) [Scope of request for utility model registration] 1. A tension roller for use in a swinging sewing machine drive unit of a hosiery sewing machine, wherein the tension roller is formed in a substantially drum-like shape with a gradually decreasing diameter from both ends toward a center. Tension roller for hosiery sewing machines.