JPS6020387Y2 - Horizontal hook with needle guide piece - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a horizontal hook with a needle guide piece, in which a needle guide piece is provided on the thread ring catcher of the outer hook.

Prior Art Generally, when sewing thick materials with a sewing machine, the needle tends to bend, and as a result, the tip of the needle comes into contact with the lid, causing the needle to break.

Purpose The present invention was devised in order to eliminate the above-mentioned drawbacks, and the needle guide piece is attached to a thread ring catcher movably attached to the outer hook body of a horizontal hook that rotates around a vertical axis. By providing this, it is possible to prevent the needle and the lid from coming into contact with each other and eliminate needle breakage.

Example Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes an outer hook that rotates completely around a hook shaft 2 that is vertically supported on a sewing machine frame (not shown). A well-known thread ring catching operation is performed in cooperation with an inner hook (not shown) whose movement is restricted and which remains stationary even when the outer hook 1 rotates.

The outer hook 1 is divided into an outer hook main body 3 and a thread ring catcher 4, and a counterbore 5 is formed on the bottom surface of the outer hook main body 3, and a screw hole 5 is formed on the bottom surface of the outer hook main body 3.
a and a pin hole 5b are provided.

The thread ring catcher 44 is provided with a hook tip 6 at the counterclockwise end of a lace surface 4a that is equal to the lace surface 1a of the outer hook body 3, and the flange portion 4b is provided with a flange portion 4b similar to the flange portion 3a of the outer hook body 3. It is formed.

Reference numeral 7 denotes a mounting part for attaching to the outer hook body 3, which has an arc-shaped elongated hole 7a in the center and a pin 8 that can extend downwardly at one end. 5b so that the thread ring catcher 4 can rotate around the pin 8.

That is, the thread ring catcher 4 is fixed to the screw hole 5a of the outer hook body 3 through the elongated hole 7a by the screw 9, which is an example of a fastening element, but by loosening the screw, the outer diameter of the screw 9 and the elongated hole are fixed. The thread ring catcher 4 can rotate with respect to the outer hook body 3 by the difference in length from the length of the hook 7a, and the hook tip 6 can move in the radial direction of the outer hook body 3. 10 The distance from the right side surface, that is, the needle-to-hook clearance a, can be adjusted.

Reference numeral 11 denotes a needle guide piece formed upright on the other end extension surface of the attachment portion 7 of the thread ring catcher 4, and the front side surface 11a of the needle guide piece 11 and the outer hook body 3
The distance from the circular center of the hook is slightly larger than that of the hook tip 6, that is, the distance between the right side of the needle 10 and the needle guide piece 11 in FIG.
If b is the distance from the front side surface 11a of the hook, the upper surface 11b is below the hook tip 6 and the needle 10 is at its lowest point as shown in the third figure, so that b is slightly larger than the needle-to- hook gap a. The left end surface 11c is located below the bottom surface of the stopper 10a, and the left end surface 11c is located forward of the hook tip 6 in the rotational direction, that is, in the counterclockwise direction.

Function The present invention is constructed as described above, and its function will be explained.

To explain how to adjust the needle/hook clearance a, loosen the screw 9 and rotate the thread ring catcher 4 around the pin 8. This changes the position of the hook tip 6 from the side of the needle 10, and the needle/hook The pot clearance a can be changed.

The needle/hook clearance a is normally set to about 0.051rrIIL.

Finally, the adjustment is completed by tightening the screw 9.

Next, to explain the function of the needle guide piece 11, which is the main purpose of the present invention, FIG. 3 shows the relationship between the needle 10, the hook tip 6, and the needle guide piece 11 when the needle 10 is at its lowest point. When sewing thick materials, if the needle 10 does not have the needle guide piece 11, it may bend as shown by the dotted line in the figure, and when the needle 10 is lowered, the needle tip 10b may come into contact with the hook tip 6, causing the needle to break. According to the present invention, the bending of the needle 10 is corrected by the needle guide piece 11 as shown by the chain line in the figure, and then the lid tip 6 and the needle 10 intersect, so that the needle tip 10b is aligned with the hook tip 6. There will be no contact.

Effects As described above, in this invention, the outer hook is divided into two parts and the thread ring catcher is movable relative to the outer hook body, so the gap between the hook tip and the needle can be adjusted as desired. I can do it.

Moreover, the adjustment is easy and requires only loosening one screw and slightly moving the thread ring catcher.

In addition, a needle guide piece is disposed on the thread ring catcher below the tip of the hook and forward in the direction of rotation, and is arranged so that the distance from the circular center of the outer hook body is approximately equal to the tip of the hook. During sewing, the bending of the needle near the lowest point of the needle is corrected by the needle guide piece, and then the needle and hook tip intersect, so there is no risk of the needle breaking due to contact between the needle tip and the hook tip.

Furthermore, since the thread ring catcher is removable from the outer hook body, only the thread ring catcher can be made of strong steel, etc., and the outer hook main body can be made of aluminum alloy or synthetic resin. This is an extremely useful idea in practice, as it can reduce the weight and cost of the horizontal pot.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a perspective view of the outer hook, Fig. 2 is an exploded perspective view of the outer hook body and thread ring catcher, and Fig. 3 is a perspective view of the needle, the hook tip, and the hook. It is an explanatory view showing the relationship with a needle guide piece. In the figure, 1 is an outer hook, 3 is an outer hook body, 4 is a thread ring catcher, 6 is a hook tip, and 11 is a needle guide piece.

Claims (1)

[Scope of utility model registration request] A cylindrical outer pot body that rotates around a vertical axis,
In a horizontal hook of a sewing machine, the sewing machine has a thread ring catcher formed with a hook tip provided on the main body, and a thread wheel catcher is provided on the bottom surface of the outer hook body so that the hook tip can be adjusted in the radial direction of the outer hook body. 1. A needle guide piece horizontal hook, characterized in that the thread ring catcher is provided with a guide piece that is integrated with the needle tip.