JPS6241736Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cloth gripping device for sewing work, and more particularly to a device for separating cloth from a needle in a cloth gripping device that uses a needle to grip the cloth.

The applicant filed a patent application for the "cloth gripping device" on the same date. In this patent application, a curved needle was used as the cloth gripping means. In this case, the fabric is scooped up very efficiently by the curved needle. However, when the fabric was to be pulled away from the needle, the fabric was released by simply allowing the needle to escape into the needle storage box. With such means, there is no device for actively removing the needle from the fabric, and therefore, depending on the fabric, an accident may occur in which a portion of the fabric is drawn into the box together with the needle. This type of accident occurs whether the needle is straight or curved. Therefore, the present invention provides a device for actively separating cloth from a needle of a needle-based cloth gripping device.

In particular, the present invention relates to an improvement of the cloth-cutting needle storage box disclosed in the above-mentioned patent application. In the above-mentioned patent application, a box 72 having a structure as shown in FIG. 3 is disclosed as a box housing a cloth hooking needle 84. In such a box 72, the hand 84 moves toward the box 72 as the rotating shaft 56 rotates counterclockwise.
If the needle 84 gets into the box 72, there is a risk that part of the fabric will get into the box 72 along with the needle 84.

For this reason, in the present invention, as shown in FIGS. 1 and 2, the box 72 is provided with an air blowing function.

FIG. 1 shows a cloth cutting needle storage box 10 of the present invention. This box 10 consists of a front wall plate 12, a rear wall plate 14, side plates 16, 16, a top plate 18, and a bottom plate 20. . A rotating shaft 56 to which rotational force is applied by a predetermined rotating means is received between the side plates 16, 16. A needle holder 76 to which a cloth cutting needle 84 is attached is fixed to the rotating shaft 56. As the rotating shaft 56 swings and rotates, the needle 84 moves in and out of the needle groove 92 of the bottom plate 20 of the box 10 to hook and grip the cloth.
I'm freeing the cloth.

The front wall plate 12 of the present invention is provided with an air passage 22 extending in the direction of the rotation axis 56. Further, the air passage 22 is provided with a plurality of air blowing passages 24 communicating with each other to blow out air to the lower surface of the front wall plate 12. Furthermore, the air passage 22 is provided with means 26 for feeding high pressure air into the passage 22 from a predetermined high pressure air source when necessary.

In the present invention, after the rotating shaft 56 rotates clockwise to cause the needle 84 to hook the cloth and perform a predetermined operation, the rotating shaft 56 rotates counterclockwise to pull the cloth from the needle. Upon rotation, the needle 84 moves into the box 10 through the needle groove 92. At this time, a sensor or timing device, known per se, is actuated to feed high pressure air into the air channel 22.
The air that has entered the air passage 22 is then blown out from the blow-off passage 24 to the bottom of the box. At this time, the air pushes the cloth caught on the needle 84 downward into the box. Therefore, even if the fabric is completely separated from the needle and the needle 84 moves into the box, the needle will not simultaneously suck the fabric into the box 10. The number and direction of the blowing passages, the strength of the blowing air, etc. can be appropriately selected depending on the work content.

This device works equally well whether the cloth cutting needle is a straight needle or a curved needle.

In the above embodiment, the air blowing passage is connected to the front wall plate 1.
Although it is provided only on the front wall plate 2, it is obvious that the present invention is not limited thereto, and that it can be provided on the other plates 14 and 16, or in combination with the front wall plate.

Furthermore, in the above description, the air blowing passage is box 1.
In addition to this, an air passage may be provided in the top plate 18 of the box 10, and the needle groove 92 may be used as an air blowing hole. In this case, since the air pushes out the cloth along the length of the needle, the cloth discharge efficiency is good.

In this way, the present invention uses high-pressure air to actively separate the fabric from the needle before the needle enters the box, so there is no risk of the needle sucking the fabric into the box, increasing the efficiency of fabric gripping work. increases.

Experiments have shown that the present invention is particularly effective when thin cloth is gripped by a cloth gripping device using a curved needle.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a box showing an example of the device of the present invention, Fig. 2 is a view taken along the - arrow in Fig. 1, and Fig. 3 is a view similar to Fig. 1 without the device of the present invention. FIG. 6 is a diagram showing a state in which the needle is in the box. Explanation of symbols, 10...Fabric break needle storage box,
12... Front wall plate, 22... Air passage, 24... Air blowing passage, 84... Cloth cutting needle, 92... Needle groove.

Claims (1)

[Scope of utility model registration request] A fabric gripping device using a needle has an air blowing means for releasing high-pressure air to the fabric in order to actively press downward and separate the fabric caught on the needle when separating the fabric from the needle. A cloth separating device for separating cloth from a needle.