JPH0639657Y2 - Sewing machine needle changer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a device used for replacing a sewing machine needle of a sewing machine.

[0002]

2. Description of the Related Art Conventionally, tweezers having a tweezers structure have been used as a sewing machine needle changing device. Then, in the state where the sewing machine needle is picked up by the sewing machine needle exchanging device, the sewing machine needle is detached from the needle fixing portion of the sewing machine rod of the sewing machine or attached to the needle fixing portion. However, with such a configuration, the support of the sewing machine needle becomes unstable because the fingertip must continue to hold the sewing machine needle replacement device during the replacement operation of the sewing machine needle, and the sewing machine needle drops accidentally during replacement. However, there is a problem in that the cloth is misaligned and hits the cloth during sewing to damage the cloth.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and a purpose thereof is to allow a sewing machine needle to be replaced in a stable state, which is advantageous in terms of cost. To provide a needle changing device.

[0004]

The sewing machine needle exchanging device according to claim 1 of the present invention, which has been proposed to achieve the above object, has a male rod portion formed at the tip of a supporting rod and an engaging cylinder body. A female thread portion is formed on the inner peripheral surface of the sewing machine, and a sewing machine needle insertion hole that penetrates the cylinder wall surface of the engagement cylinder is formed in a direction orthogonal to the cylinder axis direction of the engagement cylinder, and the male screw part of the support rod is engaged. The sewing machine needle is screwed into the female thread portion of the coupling cylinder, and is formed by frictionally engaging the sewing machine needle inserted through the sewing machine needle insertion hole of the engagement cylinder with the tip of the support rod and the inner peripheral wall surface of the engagement cylinder. It is characterized by that.

[0005]

According to the sewing machine needle exchanging device according to claim 1,
A male screw portion is formed at the tip of the support rod, a female screw portion is formed on the inner peripheral surface of the engagement cylinder, and the cylinder wall surface of the engagement cylinder is penetrated in a direction orthogonal to the cylinder axis direction of the engagement cylinder. A sewing machine needle insertion hole is formed, the male thread of the support rod is screwed into the female thread of the engagement cylinder, and the sewing machine needle inserted in the sewing machine needle insertion hole of the engagement cylinder is engaged with the tip of the support rod. Since it is configured to be frictionally engaged with the inner peripheral wall surface of the cylindrical body, the sewing machine needle is inserted into the sewing machine needle insertion hole of the engagement cylindrical body, and then the male thread portion of the support rod is screwed to move the sewing machine needle. Once frictionally engaged, the engagement state will not loosen unless the support rod is reversed, and therefore the work of attaching the sewing machine needle to the sewing machine can be performed in a stable state, and the sewing machine needle during replacement work It is possible to prevent accidental falling out of the car. Conversely, when removing a deteriorated sewing machine needle from the sewing machine, if the support rod of the sewing machine needle replacement device is reversed and the male thread of the support rod is screwed back, the tip of the support rod separates from the sewing machine needle and the friction engagement The combined state is released. Then, the sewing machine needle exchanging device is moved downward so that the sewing machine needle is pulled out from the sewing machine needle insertion hole of the engagement cylinder of the sewing machine needle exchanging device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. The sewing machine needle exchanging device A is configured by attaching an engaging cylinder body 2 to the tip of a supporting rod 1. A male screw portion 11 is formed at the tip of the support rod 1, and a grip portion 12 is attached to the base end portion of the support rod 1. A female screw portion 21 is formed on the inner peripheral surface of the engagement cylinder 2, and a pair of sewing machine needle insertion holes 22 and 23 are formed in the cylinder wall surface in a direction orthogonal to the cylinder axis direction of the engagement cylinder 2. It is installed throughout.

The male screw portion 11 of the support rod 1 is screwed into the female screw portion 21 of the engagement cylinder 2 so that the male screw portion 11 of the support rod 1 can be screwed forward and backward. Therefore,
The sewing machine needle B is inserted into the sewing machine needle insertion holes 22 and 23 of the engaging cylinder body 2, and the male screw portion 11 of the support rod 1 is screwed to support the support rod 1.
The sewing needle B can be frictionally engaged between the tip of the sewing machine and the inner peripheral wall surface of the engagement cylinder 1. Once the sewing machine needle B is frictionally engaged, the engagement state does not loosen unless the support rod 1 is reversed.

Using the sewing machine needle exchanging device A constructed as described above, the sewing machine needle C is attached to the sewing machine rod C1 of the sewing machine C.
In the case of attaching the sewing machine, the sewing machine needle B is brought into the lower part of the sewing machine rod C1 of the sewing machine C while the sewing machine needle B is frictionally engaged as described above, and the base end portion of the sewing machine needle B is fixed to the needle fixing portion of the sewing machine rod C1. Fix at C2. Next, the support rod 1 of the sewing machine needle exchanging instrument A is reversed to separate the tip of the supporting rod 1 from the sewing machine needle B to release the engagement state, and then the sewing machine needle exchanging instrument A is moved downward to move the sewing machine. The needle B is pulled out from the sewing machine needle insertion holes 22 and 23 of the engagement cylinder 2.

On the contrary, when the sewing machine needle B is removed from the sewing machine rod C1, the operation reverse to the above operation is performed to engage the sewing machine needle B fixed to the sewing machine rod C1 with the sewing machine needle exchanging instrument A,
After that, while the sewing machine needle B is supported by the support rod 1 of the sewing machine needle changing instrument A, the sewing machine needle B is moved to the sewing machine rod C of the sewing machine C.
It is released from the first needle fixing portion C2.

[0010]

As is apparent from the above description, according to the sewing machine needle exchanging device of the present invention, the sewing needle is frictionally engaged by screwing the male thread portion of the support rod into the female thread portion of the engaging cylinder. Therefore, unless the screw is forcibly loosened, the sewing machine needle will not be displaced or fall out of the sewing machine needle exchanging device, and the sewing machine needle replacement operation can be performed in a stable state. Further, by reducing the outer diameters of the support rod and the engagement cylinder, even in an industrial sewing machine in which a plurality of sewing machine needles are arranged in a row, the sewing machine needles can be replaced without being disturbed by the adjacent sewing machine needles. Can be easy. Further, it is advantageous in terms of manufacturing cost.

[0011]

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a sewing machine needle exchanging device of the present invention.

FIG. 2 is an enlarged sectional view taken along line XX of FIG.

FIG. 3 is a perspective view showing a changing operation of the sewing needle using the sewing needle changing device of the present invention.

[Explanation of symbols]

 A sewing machine needle replacement device 1 support rod 2 engaging cylinder 11 male screw part 2 engaging cylinder 21 female screw part 22 sewing machine needle insertion hole 23 sewing machine needle insertion hole

Claims (1)

[Scope of utility model registration request] 1. A male threaded portion is formed at the tip of the support rod, a female threaded portion is formed on the inner peripheral surface of the engagement cylinder, and the engagement cylinder is formed in a direction orthogonal to the cylinder axis direction of the engagement cylinder. A sewing machine needle insertion hole penetrating the cylinder wall is formed, and the male thread portion of the support rod is screwed into the female thread portion of the engagement cylinder body, and the sewing machine needle inserted into the sewing machine needle insertion hole of the engagement cylinder body is supported. A sewing machine needle exchanging device characterized by being frictionally engaged between the tip of the and the inner peripheral wall surface of the engagement cylinder.