WO2020242122A1

WO2020242122A1 - Rotary shuttle for sewing machine

Info

Publication number: WO2020242122A1
Application number: PCT/KR2020/006614
Authority: WO
Inventors: 이하
Original assignee: 이하
Priority date: 2019-05-29
Filing date: 2020-05-21
Publication date: 2020-12-03
Also published as: US20220220650A1; CN113906177A; KR102110940B1

Abstract

The present invention relates to a rotary shuttle for a sewing machine, wherein a shuttle tension spring having a lower thread separation-prevention end for facilitating threading the lower thread (A) supplied from the center is coupled to the outer circumferential edge of a lower thread case (30).

Description

Revolving Bookshelf for Sewing Machine

The present invention relates to a rotating bobbin case for a sewing machine, and more particularly, by providing a bobbin case with a lower thread take-out path so that the lower thread released from the center can be easily installed, an administrator with a large number of sewing machines can easily manage the sewing machine. It relates to a revolving booklet for a sewing machine that can.

In general, a rotating bobbin case is provided with an outer bobbin case, an inner bobbin case that is seated and rotated in the outer bobbin case, and a bobbin case. In addition, the outer bobbin case is rotated by being coupled to a rotation shaft at the bottom, and the inner bobbin case is installed to be relatively rotatable to the outer bobbin case.

The bobbin case is detachably mounted to cover the front part of the inner bobbin case, and the bobbin with the lower thread wound therein is accommodated or the lower thread wound in a cylindrical shape is directly accommodated in the bobbin case and mounted on the inner bobbin case of the sewing machine. On the other hand, it is common to regulate the rotation of the inner bobbin by a bobbin stop member installed on the needle plate.

As a related art, Korean Patent Registration No. 10-1010835 (registration date January 18, 2011) discloses a'revolving booklet of a sewing machine'.

In the prior art, the outer drum case rotates in one direction from the bottom of the needle plate 5 installed on the bed 1 and has a hook tip extending in the rotation direction on a part of the outer circumference, and It has an inner bobbin case and a bobbin case that are rotatably installed, and forms an inclined surface for thread slipping inclined toward the front surface of the bobbin case on an outer circumferential portion of the outer bobbin case continuous to a base of the tip of the hook, and the outer bobbin case As the rotating bookcase 10 of the sewing machine, the upper thread loop grabbed by the tip of the hook by rotation of the thread slides the inclined surface for slipping and passes through the front surface of the bobbin case,

A radius of the outer bobbin case of the forming portion of the thread slipping inclined surface is larger than a radius of the outer bobbin case at a portion where the forming part of the thread sliding inclined surface faces the rotation axis of the outer bobbin case.

And, a thread movement inclined surface inclined in the same direction as the thread sliding inclined surface is installed on a portion of the thread sliding inclined surface opposite to the hook tip,

An angle of inclination of the inclined surface for thread movement with respect to the rotational axis of the outer drum housing is greater than an inclination angle of the inclined surface for thread sliding with respect to the rotational axis.

However, the above-described prior art is provided with a separate mounting shaft inside the inner bobbin case to which the bobbin case is mounted, so that the amount of bobbin thread wound around the bobbin is reduced compared to the bobbin thread wound without a bobbin. There was a problem that had to be replaced frequently.

In addition, the prior art described above has a problem in that it is difficult to take out the lower thread from the bobbin to the upper portion of the needle plate 5 and take a lot of time to replace the lower thread.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to mount the lower thread drawn from the center to the lower thread case, and then with the lower thread drawing hole in the lower thread case so that it can be easily withdrawn to the upper plate of the sewing machine. A performance passage is formed, and a lower thread hanger end bent inward is provided at one end of the book shell, thereby providing a rotating bookshelf for a sewing machine that facilitates management of the lower thread that is replaced in large quantities.

The rotation book case for a sewing machine according to the present invention for achieving the above object includes a hook body that rotates by being coupled to a lower surface of a drive shaft, and an inner circumference of the hook body to rotate in a direction opposite to the hook body when the drive shaft is rotated. A lower thread base coupled to the upper end of the main wall and provided with a concave groove in a downward direction, and a lower thread case surrounding the upper and side portions of the lower thread which is inserted into the lower thread base so that the upper part is exposed, and is drawn out from the center,

The lower thread case includes a protrusion protruding by a spring elastic force so as to be fitted into the groove, one end is coupled to a kiln coupling hole formed in the protrusion, and a kiln holder for transferring the protrusion inward when the other end is raised and lowered, and the stone When both sides of the jaw are inserted and supported by spring elastic force, protrusions are provided on the upper surface, and the lower thread is coupled to a cylindrical case body with an open lower surface to fit the lower thread, and is coupled to one side of the outer periphery of the case body to withdraw the lower thread It is made of a book shell with a lower thread hook end curved inward at one end to be guided,

A lower thread concave groove is provided at one end of the protrusion retracting portion so as to be guided when the lower thread is withdrawn.

The lower thread case is provided with a lower thread withdrawal hole penetrating the center of the case body and the protrusion and the hook holder to facilitate the withdrawal of the lower thread, and the protrusion and the case body have a draw-out communication passage cut so that the lower thread withdrawal hole communicates with the outer part. It characterized in that it is provided.

The book shell is provided with a case fixing portion extending from the lower thread hanger end and coupled to the outer circumference of the case body, and an elastic insertion portion extending from the case fixing portion and being in close contact with the outer circumference of the lower thread case with an elastic force, and the The elastic insertion portion is characterized in that it is provided with a lower thread separation preventing end bent inward to prevent separation of the lower thread.

The lower thread separation prevention end is formed with an upper prevention end bent from the top and a lower prevention end bent from the bottom so that the lower thread is drawn out from the center of the end, and the case body has a hole through which the lower thread separation prevention end is concaved inward. It characterized in that the mouth groove is provided.

A lower thread hanger is provided on one side of the upper surface of the case body, which is rotated in a spiral shape so that the lower thread is concave and withdrawn from the center.

As described above, the effect of the rotating bookcase for a sewing machine according to the present invention is as follows.

First, the case body forming the lower thread case is provided with a lower thread take-out hole penetrating the center of the protrusion and the hook so that the lower thread is withdrawn, and a draw-out passage communicating with the lower thread take-out hole, so that the lower thread drawn from the center can be easily withdrawn Can,

Second, the lower thread concave groove is provided at the protrusion inlet so that the lower thread drawn through the withdrawal passage is seated on the upper surface of the case body, thereby stably guiding the lower thread when the lower thread is withdrawn to prevent entanglement of the lower thread,

Third, a lower thread hanger end bent inward is provided at one end of the book shell, and a lower thread separation prevention end is provided at the other end, so that the lower thread drawn through the lower thread concave groove can be more easily withdrawn to the upper plate of the sewing machine. There,

Fourth, by providing a lower thread hanger formed in the shape of a pig tail in the case body constituting the lower thread case, there is an effect of stably withdrawing the lower thread by maintaining a constant tension of the lower thread and preventing malfunction.

1 is a view for explaining a rotating bookcase of a sewing machine of the prior art,

Figure 2 is an exploded perspective view of a rotating bookcase for a sewing machine according to the present invention,

3 is a diagram illustrating a book shell according to the present invention,

4 is a view showing a plane and side surfaces of a lower thread case according to the present invention,

5 is a view for explaining a state in which the lower thread is withdrawn from the lower thread case according to the present invention.

Hereinafter, referring to the accompanying drawings, a detailed description of the rotating bookshelf for a sewing machine according to the present invention is as follows.

Rotating bookshelf for a sewing machine according to the present invention, as shown in Figs. 2 to 5, the drive shaft is coupled to the lower surface of the hook body 10, which rotates, and when the drive shaft is rotated, the hook body 10 faces The lower thread base 20, which is coupled to the inner periphery of the hook body 10 so as to rotate in a direction, and has a recessed groove 21 recessed downwardly at the upper end of the main wall, and an upper part inside the lower thread base 20 It consists of a lower thread case (30) surrounding the upper and side portions of the lower thread (A) inserted to be exposed and drawn out from the center.

That is, the lower thread (A) is withdrawn from the center, so that a larger amount of the lower thread (A) is wound than that provided with a separate bobbin.

In addition, the lower thread case 30 has a protrusion 31 protruding with a spring elastic force so as to be fitted into the groove 21, and one end is coupled to the kiln coupling hole 31a formed in the protrusion 31, and the other end A hook holder 32 for transporting the protrusion 31 in the inward direction when the protrusion 31 is raised and lower, and a protrusion inlet 33a is provided on the upper surface so that both sides of the protrusion 31 are inserted and supported by a spring elastic force. A cylindrical case body (33) with an open bottom surface so that the lower thread (A) is inserted, and a lower thread bent inward at one end to be guided when the lower thread (A) is drawn out by being coupled to one side of the outer periphery of the case body (33) It consists of a book shell (34) with a hook end (34a) is formed.

When the kiln holder 32 is lifted, the protrusion 31 is concave inward and can be fitted into the groove 21, and when the kiln holder 32 is placed, the protrusion 31 is externally concaved by a spring elastic force. It protrudes into and is caught in the upper inner end of the groove (21).

A lower thread concave groove (33a') is provided at one end of the protrusion inlet (33a) so as to be guided when the lower thread (A) is withdrawn, so that the lower thread (A) is located on the upper surface of the case body (33). It will be withdrawn stably through wealth.

On the other hand, the lower thread case 30 is provided with a lower thread withdrawal hole 30a penetrating through the center of the case body 33 and the protrusion 31 and the hook 32 so that the lower thread A can be easily withdrawn. , The protrusion 31 and the case body 33 are provided with a pull-out passage passage 30b cut so that the lower thread withdrawal hole 30a communicates with the outer portion, so that the lower thread A is of the hook holder 32. The lower thread concave groove (33a') is concave and withdrawn through the lower portion.

The book shell 34 extends from the lower thread hanger end 34a and is coupled to the outer periphery of the case body 33 and extends from the case fixing part 34b to the lower thread case An elastic insertion portion (34c) that is in close contact with the outer periphery of (30) is provided, and the elastic insertion portion (34c) has a lower thread separation prevention end (341) bent inward to prevent separation of the lower thread (A). It is equipped with. The lower thread (A) is drawn out in a concave state between the book shell 34 and the case body 33 by lifting the lower thread separation preventing end 341 of the book shell 34.

Here, the lower thread separation prevention end 341 has an upper prevention end 341 ′ bent from an upper portion and a lower prevention end 341 ″ bent from the lower portion so that the lower thread A is drawn out from the center of the end thereof, and the The case body 33 is provided with a prevention end concave groove 33c through which the lower thread separation prevention end 341 is concaved inward, so that the lower thread A is provided with an upper prevention end 341 ′ and a lower prevention end 341 It is drawn out through the space between ").

On the other hand, on one side of the upper surface of the case body 33, the lower thread A is rotated in a spiral shape so that the lower thread A is concave and withdrawn in the center and an extended lower thread hanger 33b is provided, so that the hook body 10 rotates rapidly Even if it does, it prevents the upper thread and the lower thread (A) from tangling with each other.

Looking at the operation of the rotating bookcase for a sewing machine according to the present invention made of the above configuration is as follows.

The rotating bobbin for a sewing machine of the present invention is accommodated in the lower thread case 30 inserted into the lower thread base 20 so that the lower thread A is wound without a bobbin and supplied from the center, as shown in FIGS. 2 to 5. do. The lower thread base 20 is seated inside the hook body 10 so as to rotate in a direction opposite to the hook body 10.

In addition, the lower thread (A) uses the central axis of the bobbin (not shown) and the space of the upper and lower plates as a winding space, and is wound more than when there is a bobbin, and when a large number of sewing machines are operated, maintenance cost is reduced.

In addition, the upper surface of the lower thread case 30 is provided with a lower thread withdrawal hole 30a in the center, and a withdrawal passage 30b cut so that the lower thread withdrawal hole 30a communicates with the side, so that the lower thread ( The withdrawal of A) becomes easy.

That is, the lower thread (A) withdrawn from the center is concave between the lower surface of the hook 32 and the upper surface of the protrusion 31 through the lower thread drawing hole 30a and the drawing hole communication path 30b to the side. Will be withdrawn. And, the lower thread (A) is drawn out to the book shell 34 through the lower thread concave groove (33a') of the protrusion inlet (33a).

In addition, the book shell 34 is bolted to the outer periphery of the side of the case body 33 through the case fixing part 34b, and the lower thread A is an elastic insertion part ( It is withdrawn to the top through 34c). At this time, an end portion of the elastic insertion portion 34c is provided with an inwardly bent lower thread separation preventing end 341, thereby preventing separation of the lower thread A.

The lower thread (A) concave between the book shell 34 and the case body 33 passes through the lower thread separation prevention end 341 and is pulled out to the upper plate of the sewing machine. It is pulled out to the upper plate through the process and the installation of the lower thread (A) is completed.

In this way, the rotating bookcase of the present invention is the lower thread take-out hole (30a) and the lead-out passage (30b), the lower thread recessed groove (33a'), the lower thread hook end (34a) to facilitate the installation of the lower thread (A) supplied from the center. ) And the lower thread separation prevention end 341 and the lower thread hanger 33b, it can be quickly installed, so that when applied to a sewing machine equipped in a large amount, it can be efficiently managed with less manpower, thereby improving productivity.

The present invention is not limited to the specific preferred embodiments described above, and any person of ordinary skill in the technical field to which the present invention pertains without departing from the gist of the present invention claimed in the claims can implement various modifications. Of course, such changes will fall within the scope of the description of the claims.

*Explanation of sign

10: hook body 20: lower thread base

21: groove 30: lower thread case

30a: lower thread withdrawal hole 30b: withdrawal passage

31: Doljo 31a: Kiln coupling hole

32: hooker

33: case body 33a: stone fitting

33a': lower thread concave groove 33b: lower thread hanger

33c: Prevention end concave groove

34: book shell

34a: lower thread hanger 34b: case fixing unit

34c: elastic insertion part 341: lower thread separation prevention end

341': upper prevention end 341": lower prevention end

A: Lower thread

Claims

The hook body 10 is coupled to the lower surface of the drive shaft and rotates, and the hook body 10 is coupled to the inner periphery of the hook body 10 so as to rotate in a direction opposite to the hook body 10 when the drive shaft is rotated. The lower thread base 20 provided with the concave groove 21 in the direction, and the lower thread case surrounding the upper and side portions of the lower thread A that is inserted into the inner side of the lower thread base 20 so that the upper part is exposed and drawn out from the center ( 30),

The lower thread case 30 has a protrusion 31 protruding with a spring elastic force so as to be fitted into the groove 21, and one end is coupled to a kiln coupling hole 31a formed in the protrusion 31, and the other end is elevated. When the protrusion 31 is transported in the inward direction, a kiln holder 32, and both sides of the protrusion 31 are inserted and a protrusion inlet 33a is provided on the upper surface to be supported by a spring elastic force, and the lower thread ( A cylindrical case body 33 with an open bottom surface so that A) is inserted, and a lower thread hook end that is coupled to one side of the outer periphery of the case body 33 and bent inward at one end to be guided when the lower thread A is withdrawn. (34a) consists of the formed book shell (34),

Rotating bookshelf for a sewing machine, characterized in that at one end of the protrusion inlet (33a) is provided with a lower thread concave groove (33a') concave inward to guide when the lower thread (A) is withdrawn.
The method of claim 1,

The lower thread case 30 is provided with a lower thread take-out hole 30a penetrating the center of the case body 33, the protrusion 31, and the hook holder 32 so that the lower thread A can be easily withdrawn, and the Rotating bookshelf for a sewing machine, characterized in that the protrusion 31 and the case body 33 are provided with a pull-out passage (30b) cut so that the lower thread withdrawal hole (30a) communicates with the outer portion.
The method of claim 1,

The book shell 34 extends from the lower thread hanger end 34a and is coupled to the outer periphery of the case body 33 and extends from the case fixing part 34b to the lower thread case An elastic insertion portion (34c) that is in close contact with an elastic force is provided on the outer periphery of (30),

The elastic insertion portion (34c), characterized in that the lower thread separation prevention end (341) bent inward to prevent the separation of the lower thread (A) is provided for a sewing machine rotating book case.
The method of claim 3,

The lower thread separation prevention end 341 has an upper prevention end 341 ′ bent from an upper portion and a lower prevention end 341 ″ bent from a lower portion so that the lower thread A is drawn out from the center of the end thereof,

The case body (33), characterized in that the lower thread separation prevention end (341) is provided with a through-hole prevention end concave groove (33c) so as to be concave inwardly.
The method of claim 1,

One side of the upper surface of the case body (33), characterized in that the lower thread (A) is rotated in a spiral shape so that it is concave and drawn out to the center portion, and an extended lower thread hanger (33b) is provided.