Rotary Bookcase for Sewing Machine
technical field
[One]
The present invention relates to a rotary drum case for a sewing machine, and more particularly, a lower thread take-out path is provided in the bobbin case so that the lower thread unscrewed from the central part can be easily mounted, so that a manager with a large number of sewing machines installed can easily manage the sewing machine It is about a rotary drum case for a sewing machine that can do it.
background
[2]
In general, the revolving bookcase includes an outer bobbin case, an inner bobbin case that is seated on the outer bobbin case and rotates, and a bobbin case. And, the outer bobbin case is rotated by being coupled to the rotation shaft at the lower portion, and the inner bobbin case is rotatably installed relative to the outer bobbin case.
[3]
And, 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 the cylindrical shape is directly accommodated in the bobbin case and mounted on the inner bobbin case of the sewing machine. On the other hand, rotation of the inner bobbin case is generally regulated by a bobbin case stop member installed on the needle plate.
[4]
As a related prior art, Korean Patent Registration No. 10-1010835 (registration date January 18, 2011) discloses a 'revolving bookcase of a sewing machine'.
[5]
In the prior art, the outer bobbin case rotates in one direction below the needle plate 5 installed in the bed 1 and has a hook tip extending in the rotational direction on a part of the outer periphery, and the front part of the outer bobbin case An inner bobbin case and a bobbin case that are rotatably installed, and an inclined surface for thread sliding that is inclined toward the front surface of the bobbin case is formed on an outer periphery of the outer bobbin case continuous to the base of the tip of the hook, and the outer bobbin case As a rotary bookcase (10) of a sewing machine, the upper thread loop held by the tip of the hook slides on the inclined surface for thread slip and passes through the front surface of the bobbin case by the rotation of
[6]
It is characterized in that the radius of the outer bobbin case of the portion where the inclined surface for thread sliding is formed is larger than the radius of the outer bobbin case of the portion where the forming portion of the inclined surface for yarn sliding faces with respect to the rotation axis of the outer bobbin case.
[7]
And, on a portion of the inclined surface for thread sliding on the side opposite to the tip of the hook, an inclined surface for thread movement that is inclined in the same direction as the inclined surface for thread sliding is provided;
[8]
An inclination angle of the yarn movement inclined surface with respect to the rotation axis of the outer bobbin case is larger than an inclination angle of the yarn sliding inclined surface with respect to the rotation axis.
[9]
However, in the prior art, as a separate mounting shaft on which the bobbin case is mounted is provided inside the inner bobbin, the amount of lower thread wound around the bobbin is reduced compared to the lower thread wound without the bobbin, and in a sewing machine operated in large quantities, the lower thread is used. There was a problem with frequent replacement.
[10]
In addition, the prior art has a problem in that it is difficult to take out the lower thread from the bobbin until the lower thread is pulled out to the upper part of the needle plate 5, so that it takes a lot of time to replace the lower thread.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[11]
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 out from the center to the lower thread case and then to easily withdraw the lower thread to the upper plate of the sewing machine. An object of the present invention is to provide a rotary drum case for a sewing machine in which a performance passage is formed and a lower thread holder end bent inwardly is provided at one end of the bobbin, so that it is easy to manage the lower thread that is replaced in large quantity.
means of solving the problem
[12]
The rotary book case for a sewing machine according to the present invention for achieving the above object includes a hook body in which a drive shaft is coupled to a lower surface and rotates, and an inner periphery of the hook body so as to rotate in a direction opposite to the hook body when the drive shaft is rotated. A lower thread base coupled to the main wall and having a recess recessed in the downward direction at the upper end of the main wall, and a lower thread case which is inserted so that the upper part is exposed inside the lower thread base and surrounds the upper part and the side part of the lower thread drawn out from the center,
[13]
The lower thread case includes a protrusion protruding by a spring elastic force to fit into the groove, one end coupled to a hook coupling hole formed in the protrusion, and a hook holder for transporting the protrusion inward when the other end is raised and lowered, and the stone; A protrusion inlet is provided on the upper surface so that both sides of the jaw are inserted and supported by a spring elastic force, and a cylindrical case body with an open lower surface for fitting the lower thread is coupled to one of the outer periphery of the case body to withdraw the lower thread. It is made of a bokkakji with a lower thread hanging end bent inwardly at one end to guide it,
[14]
A lower thread concave groove recessed inwardly to be guided when the lower thread is drawn out is provided at one end of the protrusion lead-in part.
[15]
The lower thread case is provided with a lower thread take-out hole penetrating the center of the case body and the protrusion and the pedestal so that the lower thread can be easily drawn out. It is characterized in that it is provided.
[16]
The bookcase is provided with a case fixing part extending from the lower thread hanging end and coupled to the outer periphery of the case body, and an elastic inserting part extending from the case fixing part and in close contact with the outer periphery of the lower thread case with elastic force, the It is characterized in that the elastic insertion part is provided with a lower thread separation preventing end bent inward to prevent the lower thread from being separated.
[17]
The lower thread separation preventing end has an upper preventing end bent at the top and a lower preventing end bent at the bottom so that the lower thread is drawn out from the center of the end, and the case body has a through-hole preventing end so that the lower thread separation preventing end is recessed inward. It is characterized in that the mouth groove is provided.
[18]
On one side of the upper surface of the case body, it is characterized in that the lower thread holder is provided with an extended lower thread holder that rotates in a spiral shape so that the lower thread is drawn in and out of the central portion.
Effects of the Invention
[19]
As described above, the effect of the rotary drum case for a sewing machine according to the present invention is as follows.
[20]
First, the case body forming the lower thread case is provided with a lower thread draw-out hole penetrating the center of the protrusion and the pedestal so that the lower thread is drawn out, and a pull-out performance passage communicating with the lower thread draw-out hole, so that the lower thread drawn out from the center can be easily drawn out. can,
[21]
Second, a lower thread concave groove is provided in the protrusion inlet so that the lower thread drawn out through the pull-out performance passage is seated on the upper surface of the case body, thereby stably guiding the lower thread when the lower thread is drawn out to prevent tangling of the lower thread,
[22]
Third, the lower thread hanging end bent inwardly at one end of the booklet is provided, and the lower thread separation preventing end is provided at the other end, so that the lower thread drawn out through the lower thread concave groove can be more easily withdrawn to the upper plate of the sewing machine. there is,
[23]
Fourth, since the lower thread holder formed in the shape of a pig's tail is provided in the case body constituting the lower thread case, the tension of the lower thread is constantly maintained and the lower thread can be stably drawn out by preventing malfunction.
Brief description of the drawing
[24]
1 is a view for explaining a rotary book case of a sewing machine of the prior art,
[25]
2 is an exploded perspective view of a rotary drum case for a sewing machine according to the present invention;
[26]
3 is a view for explaining the booklet according to the present invention,
[27]
4 is a view showing a plane and a side surface of the lower thread case according to the present invention,
[28]
5 is a view for explaining a state in which the lower thread is drawn out from the lower thread case according to the present invention.
Best mode for carrying out the invention
[29]
Hereinafter, a rotary bookcase for a sewing machine according to the present invention will be described in detail with reference to the accompanying drawings.
[30]
The rotary drum case for a sewing machine according to the present invention, as shown in FIGS. 2 to 5 , includes a hook body 10 having a drive shaft coupled to a lower surface to rotate, and the hook body 10 when the drive shaft is rotated. The lower thread base 20 is coupled to the inner periphery of the hook body 10 so as to rotate in the specified direction and provided with a recess 21 recessed in the lower direction at the upper end of the main wall, and the upper part is located inside the lower thread base 20. It consists of a lower thread case 30 which is inserted so as to be exposed and surrounds the upper part and the side part of the lower thread A, which is drawn out from the center.
[31]
That is, the lower thread A is drawn out from the center, and a larger amount of the lower thread A is wound than that provided with a separate bobbin.
[32]
In addition, the lower thread case 30 has a protrusion 31 protruding by spring elastic force to fit into the groove 21, and one end is coupled to a hook coupling hole 31a formed in the protrusion 31, and the other end A pedestal (32) for transporting the protrusion (31) in the inward direction when lifting and lowering, and a protrusion inlet (33a) are 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 so that the lower thread A is inserted, and a lower thread coupled to one side of the outer periphery of the case body 33 and curved inward at one end to guide the lower thread A when the lower thread is drawn out. The hook end (34a) is formed of a bukdakji (34).
[33]
When the pedestal holder 32 is lifted, the protrusion 31 is recessed inward and can be fitted into the groove 21, and when the pedestal holder 32 is released, the protrusion 31 is concave to the outside by spring elastic force. It protrudes to be caught in the upper inner end of the groove (21).
[34]
A lower thread indentation groove (33a') recessed inwardly to be guided when the lower thread (A) is drawn out is provided at one end of the protrusion inlet portion (33a), so that the lower thread (A) is connected to the upper surface of the case body (33). It will be withdrawn stably through wealth.
[35]
On the other hand, the lower thread case 30 is provided with a lower thread withdrawing hole 30a penetrating the center of the case body 33, the protrusion 31, and the hanger 32 so that the lower thread A can be easily drawn out. , The protrusion 31 and the case body 33 are provided with a lead-out performance passage 30b cut out so that the lower thread take-out hole 30a communicates with the outer side, so that the lower thread A is connected to the pedestal (32). It passes through the lower part and is recessed into the lower thread concave groove (33a') to be withdrawn.
[36]
The bookcase 34 includes a case fixing part 34b extending from the lower thread hanging end 34a and coupled to the outer periphery of the case body 33, and extending 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, and the lower thread separation prevention end 341 is bent inward to prevent the lower thread A from leaving the elastic insertion portion 34c. this is provided The lower thread (A) is drawn out in a concave state between the bobbin (34) and the case body (33) by lifting the lower thread separation preventing end (341) of the bobbin (34).
[37]
Here, the lower thread separation preventing end 341 has an upper preventing end 341 ′ bent at the upper portion and a lower preventing lower end 341 ″ bent at the lower portion so that the lower thread A is drawn out from the center of the end, and the The case body 33 is provided with a prevention end recessed groove 33c through which the lower thread separation prevention end 341 is recessed inward, so that the lower thread A has an upper preventing end 341 ′ and a lower preventing end 341 . It is drawn out through the space between ").
[38]
On the other hand, on one side of the upper surface of the case body 33, the lower thread holder 33b rotates in a helical shape so that the lower thread A is recessed into the central portion and withdrawn, and an extended lower thread holder 33b is provided, so that the hook body 10 rotates rapidly. Even so, the upper thread and the lower thread (A) are prevented from being tangled with each other.
[39]
[40]
The operation of the rotary drum case for a sewing machine according to the present invention having the configuration as described above is as follows.
[41]
As shown in FIGS. 2 to 5, the rotary drum case 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 and supplied from the center without a bobbin. 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 .
[42]
In addition, the lower thread (A) is wound more than a case in which there is a bobbin by using the space of the central axis and the upper and lower plates of the bobbin (not shown) as a winding space, thereby reducing maintenance costs when operating a large number of sewing machines.
[43]
In addition, a lower thread take-out hole 30a is penetrated in the center of the upper surface of the lower thread case 30, and a draw-out performance passage 30b cut so that the lower thread take-out hole 30a communicates with the side is provided, so that the lower thread ( The withdrawal of A) becomes easy.
[44]
That is, the lower thread (A) drawn out from the center passes through the lower thread take-out hole (30a) and the outgoing performance passage (30b), and is recessed between the lower surface of the pedestal (32) and the upper surface of the protrusion (31) to the side. will be withdrawn Then, the lower thread (A) is drawn out to the booklet 34 through the lower thread concave groove (33a') of the protrusion inlet (33a).
[45]
And, the booklet 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 ( 34c) is withdrawn to the upper part. At this time, the lower thread separation prevention end 341 bent inwardly is provided at the end of the elastic insertion part 34c, thereby preventing the lower thread A from being separated.
[46]
The lower thread (A) recessed between the booklet (34) and the case body (33) passes through the lower thread separation prevention end (341) to maintain tension when drawn out to the upper plate of the sewing machine (33b). It is drawn out to the upper plate through the , and the installation of the lower thread (A) is completed.
[47]
As described above, in the rotary drum case of the present invention, the lower thread take-out hole 30a, the lead-out performance passage 30b, the lower thread concave groove 33a', and the lower thread hanger end 34a so as to facilitate the installation of the lower thread A supplied from the center. ) and the lower thread separation prevention end 341 and lower thread hanger 33b, it can be installed quickly, so that when applied to a sewing machine equipped with a large amount, it can be efficiently managed with a small number of manpower, thereby improving productivity.
[48]
The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone with ordinary skill in the art to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, such modifications are intended to be within the scope of the claims.
[49]
[50]
* Explanation of symbols
[51]
10: hook body 20: lower thread base
[52]
21: groove 30: lower thread case
[53]
30a: lower thread take-out hole 30b: take-out performance passage
[54]
31: doljo 31a: kiln joiner
[55]
32: gama catch
[56]
33: case body 33a: stone join in
[57]
33a': lower thread concave groove 33b: lower thread hanger
[58]
33c: prevention short recessed groove
[59]
34: bookworm
[60]
34a: lower thread hanging end 34b: case fixing part
[61]
34c: elastic insertion part 341: lower thread separation prevention end
[62]
341': upper barrier end 341": lower barrier end
[63]
A: lower thread
Claims
[Claim 1]
The drive shaft is coupled to the lower surface of the hook body 10 to rotate, and the hook body 10 is coupled to the inner periphery of the hook body 10 to rotate in a direction opposite to the hook body 10 when the drive shaft is rotated and is coupled to the upper end of the peripheral wall. A lower thread base 20 having a recess 21 recessed in the direction, and a lower thread case surrounding the upper part and the side of the lower thread A, which is inserted so that the upper part is exposed inside the lower thread base 20 and drawn out from the center ( 30), and one end of the lower thread case 30 is coupled to a protrusion 31 protruding by a spring elastic force to fit into the recess 21, and a hook coupling hole 31a formed in the protrusion 31. and a pedestal (32) for transporting the protrusion (31) in the inward direction when the other end is raised and lowered, and a protrusion inlet (33a) on the upper surface portion so that both sides of the protrusion (31) are inserted and supported by spring elastic force. It is provided with a cylindrical case body 33 having an open lower surface so that the lower thread (A) is fitted, and is coupled to one side of the outer periphery of the case body (33) at one end so as to be guided when the lower thread (A) is drawn out. It is made of a bookcase 34 having a lower thread hanging end 34a bent inward, and at one end of the protrusion lead-in part 33a, a lower thread concave groove 33a recessed inward to guide the lower thread A when withdrawing it. ') is a rotary drum case for a sewing machine, characterized in that it is provided.
[Claim 2]
The lower thread withdrawal hole (30a) of claim 1, wherein the lower thread case (30) has a lower thread draw-out hole (30a) passing through the center of the case body (33), the protrusion (31), and the hanger (32) so that the lower thread (A) can be easily drawn out. ) is provided, and in the protrusion 31 and the case body 33, a draw-out performance passage 30b cut so that the lower thread take-out hole 30a communicates with the outside is provided.
[Claim 3]
The case fixing part (34b) according to claim 1, wherein the booklet (34) extends from the lower thread hanging end (34a) and is coupled to the outer periphery of the case body (33), and the case fixing part (34b) An elastic insert portion 34c extending from the outer periphery of the lower thread case 30 is provided with elastic force, and the elastic insert portion 34c has a lower thread bent inward to prevent separation of the lower thread A. A rotary drum case for a sewing machine, characterized in that provided with a departure prevention end (341).
[Claim 4]
According to claim 3, wherein the lower thread separation prevention end (341) has an upper preventing end (341') ​​bent at the top and a lower preventing end (341") bent at the bottom so that the lower thread A is drawn out from the center of the end. It is formed, and the case body (33) has a revolving drum case for a sewing machine, characterized in that the lower thread separation prevention end (341) is provided with an indentation groove (33c) with a through-hole to be concave inward.
[Claim 5]
The sewing machine according to claim 1, wherein an extended lower thread holder (33b) is provided on one side of the upper surface of the case body (33) so that the lower thread (A) is indented and drawn out in a helical shape. revolving book.