KR920000680Y1 - Automatic sewing thread cutter for sewing machine - Google Patents

Abstract

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Description

Automatic thread trimmer for sewing machine

1 is an installation state of the present invention.

2 is a perspective view of main parts of the present invention.

3 is a front view of the main part of the present invention.

4 is an explanatory view of the operation of the minimum progress state according to the use of the present invention.

5 is an operation explanatory diagram of the minimum progression state according to the use of the present invention.

6 is an explanatory view of the operation of the minimum progress state in accordance with the use of the present invention.

* Explanation of symbols for the main parts of the drawings

1: Cases 2, 3, 4: Vertical, horizontal movement, variable lever operating lever

2a, 3a, 4a: Rollers 2b, 3b, 4b: Link

5: Moving port 5a, 5b, 5c: vertical, horizontal movement, variable blade operation inclined rail

6: wire 7: vertical movement port

8: horizontal movement hole 9: variable blade operation piece

11: cutting blade combiner 12: fixed blade

13: variable blade 14: request

15: shaft 16: variable blade operating shaft

17: return spring

The present invention relates to an automatic trimming machine for a sewing machine in which a cutting blade connected to a lever and a link mechanism is moved to a predetermined position by a wire pulling operation, and the cutting operation of the thread is automatically performed. An improved design of -19014.

Prior to filing 88-19014, in addition to the essential components such as the levers and links for the vertical movement of the cutting edge, horizontal movement, and automatic movement of the cutting edge, there are too many parts for blocking and guiding them, respectively. It is very complicated, it is not easy to manufacture and repair, and many points of failure are pointed out, and the cutting blade is installed in the case cover to be pulled out of the case during use, so if the user does not accurately predict the position, He was injured and contained the risk of a safety accident.

Therefore, the present invention has been made in view of this point, and the configuration for the vertical and horizontal movement of the cutting blade and the operation of the variable blade and the connection configuration for supporting the guide is more simplified, the cutting blade is located outside the case It is intended to provide an automatic trimmer that can be installed and repaired as easily as possible, greatly reduces the incidence of failures, and can eliminate safety accidents in advance.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

On the central axis (1 ') of the inner side of the case (1), the vertical pivoting lever (2), the horizontal pivoting lever (3), and the variable blade pivoting lever (4) are combined in three stages, each of which is rotated. One end of the lever is connected with the rollers 2a, 3a, and 4a, and the other end is connected with the links 2b, 3b, and 4b.

The rollers 2a, 3a, and 4a correspond to the long, medium and short vertical moving slope rails 5a, the horizontal moving slope rails 5b, and the variable blade automatic tilt rails 5c, respectively. The inclined rails protrude downward from the bottom of the movable tool 5 which is moved forward and backward on the guide 20 by the wire 6.

Vertical shifting holes 7 and horizontal shifting holes 8 are respectively connected to the links 2b and 3b by being fitted into the guides 10 and 10 ', and the variable blade operating piece 9 is connected to the link 4b. ) Is connected, the guide (10 ') of the horizontal port (8) is fixed to the lower vertical port (7). On one side of the horizontal movable opening (8) is a cutting blade coupling tool 11 is formed bent and the fixed blade 12 exposed to the outside of the side of the case through the request (14) concave in the lower case 1 is the shaft tube (15) Fixed together, the variable blade operating piece 9 and the variable blade 13 are installed at both ends of the variable blade operating shaft 16 inserted into the shaft tube 15.

Each of the moving members is shot as return springs 17, and the outer ear 6 is installed in the tube 6 'and connected to a separate clutch mechanism (not shown).

The present invention configured as described above covers the cover 18 to the case 1 as shown in FIG. 1 and is installed on the side of the sewing machine 19, and the wire 6 is connected to a separate clutch mechanism to be pulled at the foot position of the sewing thread. It is used after installation so that the operation can be made. When the wire 6 is pulled, the cutting blade coupling tool 11 is moved vertically or horizontally, or the cutting operation by the rotation of the variable blade 13 is sequentially performed. do.

That is, as shown in FIG. 4, when the wire 6 is pulled, the movable tool 5 connected thereto is moved to one side on the guide 17, and the vertically moving slant rails 5a of the long, middle and short lengths protrude downward on the bottom surface thereof. The rollers of the respective rotating levers are sequentially connected to the variable blade operating inclined rail 5c, and the rollers 2a of the vertically moving rotary lever 2 correspond to the lower vertically moving rails 5a. Since the pivot lever rotates in one direction from the center axis 1 ', this pivot movement causes the horizontal shift hole 8 to move downward by operating the vertical shift hole 7 connected to the link 2b. The fixed blade 12 and the variable blade 13 of the lower cutting blade coupling sphere 11 formed to be bent at one side thereof is made to move vertically to protrude under the case (1), in which case the shaft tube (15) Of the cutting edge coupling 11 as it exits within the request 14 in the lower part of the case 1. Horizontal movement is possible. At the same time as the vertical movement ends, as shown in FIG. 5, the roller 3a of the horizontal rotation lever 3 corresponds to the horizontal movement inclination rail 5b of the intermediate length, and is pushed downward, thereby being rotated downward. As the shaft 1 'is rotated, the horizontal moving hole 8 connected to the link 3b is moved horizontally, and thus, the horizontal movement of the cutting blade coupler 11 is performed. As the roller 4a of the variable blade actuating pivot lever 4 corresponds to the variable blade actuating inclined rail 5c of short length, the pivot lever 4 is also rotated from the central axis 1 'as the link 4b. As the variable blade operating piece (9) connected by the shaft rotates about the shaft tube (15), the variable blade (13) connected to the variable blade operating shaft (16) is rotated on the side of the fixed blade (12). It will work.

As described above, the vertical, horizontal, and cutting operations of the three stages by pulling the wires 6 are continuously performed in sequence. Therefore, the fixed blade 12 and the variable blade 13 are moved to the cutting position of the sewing thread to finish the yarn. Or other sewing materials can be refused.

Meanwhile, when the pulling force of the wire 6 is removed, the cutting blade coupler 11 is reversely horizontally and vertically moved by the respective return springs 17 and is automatically returned to its original state.

Therefore, the present invention can automatically cut the sewing thread or narrow sewing materials without using separate scissors and hands without having to stop the sewing machine during sewing, which can greatly improve sewing efficiency and simplify the installation of each component. It is easy to manufacture and repair, and at the same time, there is little failure rate, and the cutting blade is exposed to the outside of the case so that the location of the user can be identified, thereby preventing the risk of safety accident.

Claims (1)

On the central axis (1 ') of the inner side of the case (1), the vertical pivoting lever (2), the horizontal pivoting lever (3), and the variable blade pivoting lever (4) are combined in three stages, each of which is rotated. Rollers (2a), (3a), (4a) and links (2b), (3b), and (4b) are connected at both ends of the lever, and each roller has long, middle, and short vertical, horizontal and variable blades. Corresponding to the operation inclined rails (5a), (5b), (5c), the two inclined rails are projected downward on the bottom surface of the movable port (5), which is moved forward and backward by the wire (6), the link (2b), (3b) and (4b) are respectively connected to the vertical mover (7), the horizontal mover (8) and the variable blade operating piece (9), the cutting blade coupler (11) on one side of the horizontal mover (8) Is bent to form a fixed blade 12 exposed to the outside of the side of the case through the request 14 arranged in the lower part of the case (1) is fixed to the shaft tube 15, the variable blade operating shaft inserted into the shaft tube (15) Variable blade operating piece 9 and variable blade 13 at both ends of ) Is installed, and each moving member is a sewing machine automatic trimmer (絲 絶) having a configuration that is shot as a return spring (17).