JPS61170488A - Bobbin thread feed mechanism 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 [Technical Field 1] The present invention provides a bobbin thread feeding thread 8 for a lockstitch forming sewing machine particularly suitable for industrial production. It's about ellipses.

[Prior art 1] The bobbin thread of a lockstitch-forming sewing machine is made by winding the bobbin thread in advance from old rice onto a bobbin, placing the bobbin in a bobbin case, and then fitting it into the inner hook to increase the effectiveness of the bobbin thread in creating the stitches of the sewing machine. However, the amount of bobbin thread that can be wound onto the bobbin is very small, and when used for industrial production, the bobbin must be replaced many times a day, and the bobbin thread has to be replaced many times a day. The thread tension was located at the bottom of the sewing machine, making it difficult to adjust and causing great inconvenience.

[Objective of the Invention 1 The present invention has been made in view of the above-mentioned points, and its object is to replace the lower thread at the upper part of the sewing machine at 3 tc when the bobbin thread no longer needs to be replaced. To provide an adjustable bobbin thread feeding mechanism for a lockstitch forming sewing machine.

[Disclosure of the Invention 1 Hereinafter, the configuration of the present invention will be explained with reference to illustrated embodiments.
As shown in the attached drawing, the lower rotary transfer 1 of the lockstitch forming sewing machine
The bobbin thread follows the thread feeding pipe 2 fitted into the central cavity of the bobbin case, and is supplied through the thread feeding port 4 provided in the inner pot shaft and the thread feeding port 6 in the bobbin case. It is something.

In this way, in the present invention, a hole is made in the lower rotating shaft 1 of the sewing machine to provide a central cavity, and the bobbin thread is supplied through the yarn feeding pipe 2 inserted into the central cavity to be attached to the bobbin. This is an innovative mechanism in which the bobbin thread is fed to the α-contact bobbin case 5 without winding the bobbin thread. Therefore, in the present invention, the bobbin thread is fed through the thread feeding pipe. It is possible to supply the bobbin thread from the top of the sewing machine through the thread, and it is also possible to adjust the tension of the bobbin thread at the top of the sewing machine.

The bobbin thread feeding mechanism shown in the accompanying drawings is configured as follows. The lower rotary wheel of the lockstitch forming sewing machine is cut in the middle, and a hole is made so that the center of the lower rotary shaft 1 closer to the rotary hook 8 is hollow. A yarn feeding pipe 2 is inserted into the hollow lower rotating shaft 1. The bobbin holder of the inner pot 3 has a yarn feeder opening 4 in the sleeve.

A yarn feeder 6 is opened in the shaft of the bobbin case 5. The cut lower rotating shaft 1 is connected to the main rotating wheel via a gear. The bobbin yarn is supplied from the hole 7 of the yarn feed pipe 2, passes through the yarn feed port 4 of the inner hook 3, and is fed through the yarn feed port 6 of the bobbin case 5. In this case, it goes without saying that the bobbin thread tension can be adjusted at the top of the sewing machine.

This invention eliminates the need to replace the bobbin thread and allows the thread tension to be easily adjusted, making it a sewing machine particularly suitable for industrial production, improving efficiency by shortening time and reducing costs. Also, sewing 8! In response to machine automation and robotization,
Bobbin thread exchange has been a major hindrance, but this is a mechanism that can easily be improved.

Sewing machines that use this lockstitch seam formation include straight stitch machines, straight #i double row stitch machines, heathered stitch zigzag machines, lockstitch double row zigzag machines, lockstitch squeezing machines, button hole sewing machines, bar tacking machines, etc. It has a wide range of uses and is a sewing machine mechanism that will revolutionize the sewing industry in the future.

E Effects of the Invention 1 As described above, the present invention is characterized in that the bobbin thread passes through the thread supply pipe that is pumped into the central hollow part of the single rotation wheel of the lockstitch forming sewing machine, and the thread supply pipe that is opened in the inner hook shaft. Since the bobbin thread is supplied through the thread opening and the thread feeding port of the bobbin case, it is possible to supply the bobbin thread from the top of the sewing machine through the thread feeding pipe, and it is possible to It has the unique effect of eliminating the need for replacement and making it possible to adjust the tension of the bobbin thread at the top of the sewing machine, making it particularly suitable for industrial production sewing machines.

[Brief explanation of the drawing]

The accompanying drawing is a sectional view of a bobbin yarn feeding mechanism according to an embodiment of the present invention. 1 is the lower rotating shaft, 2 is the bobbin thread feeder pipe, 3 is the inner hook, 4 is the inner hook thread feeder, 5 is the bobbin case, 6 is the bobbin case thread feeder, 7 is the bobbin thread feeder, and 8 is the rotary hook. be.

Claims (1)

[Claims] (1) The bobbin thread passes through the thread feeding pipe fitted into the central hollow part of the lower rotating shaft of the lockstitch forming sewing machine, passes through the thread feeding port opened in the inner hook shaft and the thread feeding port of the bobbin case, and then passes through the A bobbin thread feeding mechanism for a lockstitch forming sewing machine, characterized in that thread is supplied.