JPS5937986A - Needle stop tool of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a needle stopper of this type for attaching one or more needles, as shown in FIG. This needle stopper consists of a needle holder 1 and a tightening screw 2 screwed into the needle holder.The needle is installed by inserting the needle 5 into the gap 4 between the needle bar 3 and the needle holder 1, and then tightening the screw. This is done by screwing in the screw 2 and compressing the needle circumferential surface by the wedge action of the tightening part 6 at the tip, or if the tightening part is biased towards either the left or right side of the needle. , the pattern needle hits one side, and the needles on both sides can only be stopped at the same time. Therefore, the wedge action of the tightening part would cause the buttons on both sides to become wedged, which would require considerable precision in the machining of the screw holes.

If the tightening portion is formed separately from the tightening screw, the machining accuracy of the screw hole can be considerably relaxed. This is because even if the tightening screw is slightly deviated from the feeding section, the needle can be stopped by pushing the tightening screw through the joint by screwing in the tightening screw.

However, even in this case, the following problems still existed. This is because the tightening part becomes unstable and even if the dispensing part is supported from below to prevent it from falling off, it tends to tilt and there is a risk that the needle cannot be tightened.

If the guide allows movement in only one direction to prevent the tightening part from becoming unstable, precision will be required in the machining of the guide.

A first object of the present invention is to solve the above-mentioned problems caused by separating the tightening part.

According to the invention, this object is achieved by providing a spacer with a clamping part, whose upper part is slidably supported on the needle bar toward the needle mounting surface.

Another feature of the present invention is that in order to position the needle in the vertical direction, the spacer is provided with a stepped portion that joins the upper end surface of the needle, thereby providing a needle stopper for a sewing machine having such features. This is the second purpose.

In the past, a step was generally formed in the needle groove of the needle bar to position the needle in the vertical direction. Since the scratches had to be formed in the needle groove, the needle attachment part of the needle bar had a complicated shape, and the machining was troublesome. If a spacer is used as in the present invention and the spacer is provided at a stepped portion, there is no need to provide a stepped portion on the needle bar and processing is easy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A side groove 12 cut into a uniform shape at the lower end of 1 has a needle 1 on the bottom surface of the groove.
It has a width that allows three or two needles to be inserted side by side, and is surrounded by a needle holder 16 that fits into the needle bar 11 and is secured by a set screw 15, into which a spacer and needles 13 (to be described later) are inserted. A void is formed between the holes.

The spacer 17 is rotatably and slidably supported in the upper part by a pin Ig at the tip of a stepped screw 18 screwed into the needle bar 11, and is tilted about the pin Ig as a fulcrum within the range of the above-mentioned gap and rotates toward the bottom of the needle groove. It looks like a vine that moves forward and backward, -
On the side, there is a circular hook-shaped fastener (-1 part 1) that protrudes toward the bottom of the needle groove.
9 is provided, and above it is a convex portion 2 for positioning the upper end of the needle to be attached and for vertically positioning the pattern needle.
0 is formed.

The protrusions 20 may be provided corresponding to the respective needles to be attached, or alternatively, as shown in FIG. 2, only the protrusions are formed for the right needle, and the left needle is positioned by the pin 18'. Good too. On the other hand, the needle holder 16 is provided with a screw hole 22 that communicates with the needle groove, into which a screw hole 22 is screwed, and when the screw is screwed in, the spacer 17 is pushed in at its protruding end. It is now possible to

The needles are attached by inserting the needles while placing their flat parts against the bottoms of the needle grooves until they touch the convex parts 20, and then screwing in the tightening screws 23.

That is, the spacer 17 is pushed in by screwing in the tightening screw, and the needles 13 on both sides are simultaneously fixed by the wedge action of the tightening portion 19. When screwing in the tightening screw, even if the tip of the tightening part is biased toward one of the needles, once it comes into contact with the pattern needle, it can tilt around the spacer 17 or pin 18' as a fulcrum as described above, so the arc-shaped needle It moves guided by the curve and reaches the middle position between the two hands. Therefore, even if the tip of the tightening portion is initially biased toward one needle, by screwing in the tightening screw, it will be located at an intermediate position, and both needles will be securely fixed.

The above is an example of installing a double needle. - When installing a wooden nail, there is only a slight play in the lateral direction of the spacer, and the inclination is limited to that range, so that the tightening part is separated from the needle. Since there is no problem, it can be carried out without any problems.

When installing three needles, use the protrusion 8 as shown in Figure 1.
It is a good idea to provide

It is desirable that the spacer can be tilted as described above (this is because even if the pin 18' is out of position, the spacer will tilt and hang at the tip of the tightening part or between the left and right needles). If the device can slide, it is possible to achieve the object of the present invention without tilting.

In the one shown in FIG. 5, instead of forming a conical tightening portion on one side of the spacer 31, a vertically long wedge-shaped tightening portion 32 is formed that is directed toward the tip or the middle position of the needle. The needle is held by wire contact, and the needle can be held securely.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional needle stopper, Figs. 2 to 5 show a needle stopper according to the present invention, Fig. 2 is a partially sectional front view, and Fig. 3 is a longitudinal section. Top view, Figure 4 is A-A in Figure 2
A line sectional view, and FIG. 5 is a longitudinal sectional view of a modified form. 110 Needle bar 12... Needle groove 13... Needle 16-... Needle holder 170 Spacer 18... Step screw 19... Tightening part 20... Step part 220 Screw hole 23... Tightening screw 31.
・Spacer 32nd Association, Tightening Department Patent Attorney Akira Sato - Figure 1 Figure 2 Figure 3 Figure 5

Claims (1)

[Scope of Claims] (1) A plurality of needles 13 are arranged side by side and are fitted and attached to the lower end of a needle bar in which a needle groove 12 of a temple width is cut, forming a gap between them and the needle bar 11. , and a needle holder 16 having a screw hole 22 facing toward the bottom of the needle groove, and a tightening screw screwed into the screw hole 22.
A spacer 17.31 that loosely fits into the above-mentioned cavity, is supported by the needle bar at the upper part so as to be movable toward the bottom of the needle groove, and has a tightening part 19.32 having a wedge-shaped cross section on the negative side of the bottom of the needle groove. The needle inserted into the spacer is pressed by the tightening part on the spacer side that is pushed out by screwing in the tightening screw, and the needle is inserted into the spacer wedge 4.
The spacer 17 is rotatably and slidably supported on a pin 18' that protrudes from the needle bar at the upper part, and the tightening part 19 has a conical shape. Claim 1(8)
Claim 1'fA in which the tightening part has a vertically long wedge shape
Needle stopper (4) of the sewing machine described above: A plurality of needles 13 are arranged side by side, and are fitted and attached to the lower end of the needle bar in which a needle groove 12 of a temple width is cut, and a gap is formed between the needle bar 11 and the needle bar 11. A needle holder 16 is formed with a threaded hole 22 facing the bottom of the needle groove, and a tightening screw is screwed into the threaded hole 22. A clamping part 19.32 with a box-shaped cross section is provided protruding from the bottom side of the needle groove on one side, and the upper end of the needle is engaged for vertical positioning of the needle. Stepped portion 20
The needle, which is inserted into the cavity and positioned in the vertical direction by the stepped part, is crimped by the spacer-side tightening part that is pushed out by screwing in the blinking screw. , a sewing machine needle stopper that is fixed by its wedge action.