CN115087771B - Internal rotation type sewing device comprising crescent hooks - Google Patents
Internal rotation type sewing device comprising crescent hooks Download PDFInfo
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- CN115087771B CN115087771B CN202180013500.7A CN202180013500A CN115087771B CN 115087771 B CN115087771 B CN 115087771B CN 202180013500 A CN202180013500 A CN 202180013500A CN 115087771 B CN115087771 B CN 115087771B
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- hook
- hook body
- transmission
- lower thread
- type sewing
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- 238000009958 sewing Methods 0.000 title claims abstract description 79
- 230000005540 biological transmission Effects 0.000 claims abstract description 93
- 238000000926 separation method Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 10
- 230000004308 accommodation Effects 0.000 abstract description 6
- 238000013459 approach Methods 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
- D05B57/143—Vertical axis type
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The internal rotation type sewing device comprising a crescent hook comprises: a housing part having a hollow cylindrical shape with one side open; a gear part disposed at an open side and an opposite side of the housing part, for receiving rotation power from the driving shaft to rotate; a transmission unit which is housed in the housing unit and receives rotational power from the gear unit to rotate; and a hook body portion including a loop hook for hanging an upper thread, which is accommodated in the housing portion, and which is located closer to an opening side of the housing portion than the transmission portion, and which receives rotational power from the transmission portion to rotate, wherein the inner rotating type sewing device including the crescent hook is characterized in that a lower thread accommodation space is formed in the hook body portion along the same direction as an opening direction of the housing portion, such that a lower thread accommodated in the lower thread accommodation space is discharged from between the hook body portion and the transmission portion and is hung on the upper thread.
Description
Technical Field
The present invention relates to an internal rotation type sewing device including a crescent hook, and more particularly, to an internal rotation type sewing device including a crescent hook, which can prevent a thread from being entangled by maintaining tension of the thread fed to a sewing article, thereby preventing a sewing failure.
Background
As a sewing machine, the sewing machine can be used for quickly and easily manufacturing other sewn articles such as clothes, bags, shoes and the like in a mechanical sewing mode.
However, in the sewing work, the work of moving the sewn article, sewing along the thread, adjusting the sewing machine, or the like is finally completed by the operator of the sewing machine, and therefore, the efficiency of the sewing work depends on the efficiency of the sewing machine.
The basic principle of the sewing machine is that a lower thread is provided and an upper thread is pulled, so that a stitch (stitch) is formed on a sewn article by knitting the lower thread and the upper thread by a mechanical action, so that, in particular, a sewing machine lower thread supply device, which may be called a heart of the sewing machine, is provided, and a lower thread setting amount of the sewing machine is the most important factor for determining a sewing work continuity, and thus a sewing efficiency is also dependent thereon, and thus, many efforts have been made to increase a lower thread winding amount of the sewing machine.
However, according to the understanding of the ergonomics, the size of the transverse, longitudinal and height of the modern sewing machine has gradually been developed to be the optimal state in which the sewing work can be performed, and in the technical field of the present invention, the application of deformation to the basic structure of the sewing machine is hesitant, so there is a limit in developing the lower thread feeding device of the sewing machine as a part thereof.
Fig. 1 is a view showing a prior art lower thread supply device of a sewing machine, and fig. 2 is an exploded view of fig. 1.
As shown in fig. 1 and 2, a conventional sewing machine lower thread supply device 1 is a device that is coupled to a drive shaft D provided at a lower side portion of a sewing machine, receives power from the drive shaft D to rotate, and supplies lower thread.
The sewing machine lower thread supplying apparatus 1 has a cylindrical shape, and a plane thereof is circular and has a relatively large diameter compared to a height, so that a capacity of accommodating lower thread of the sewing machine lower thread supplying apparatus 1 can be greatly increased.
The lower thread feeding device 1 for a sewing machine includes a housing 10, a gear 20, a cover 30, a transmission 40, a hook body 50, and a housing 60.
The housing 10 has a cylindrical shape, and has an accommodation space formed therein, and is open on one side, and accommodates the rotation gear 23, the rotation gear cover 33, the transmission unit 40, the hook body 50, and the like in the accommodation space through the open side.
One side of the gear part 20 is connected to a driving shaft D of the sewing machine, receives rotational power from the rotating driving shaft D and transmits the rotational force to the transmission part 40 through engagement with gear teeth.
Such a gear portion 10 rotates the transmission portion 40 by the power received from the drive shaft D, and the rotation force of the transmission portion 40 rotates the hook body portion 50 as the transmission portion 40 is connected to the hook body portion 50.
The gear portion 20 as described above includes a transmission gear portion 21, and a rotation gear 23.
The cover portion 30 is used to fix the gear portion 20 to the housing portion 10 so that the gear portion 20 can be rotatably placed in the housing portion 10.
A plurality of fixing holes penetrating from one surface to the other surface are formed in the cover portion 30, and the cover portion 30 can be coupled to the housing portion 10 by inserting the fixing means F into the fixing holes.
Such a cover portion 30 includes a transmission gear cover portion 31, a rotation gear cover portion 33.
Fig. 3 is a view showing a transmission part in the lower thread supplying apparatus of the sewing machine of fig. 2.
The transmission unit 40 rotates in synchronization with the rotation gear 23 with the rotation shaft of the rotation gear 23 as the rotation center.
The transmission part 40 is formed obliquely in the housing space of the housing part 10, and pushes a part of the hook body part 50 to transmit power.
Fig. 4 is a view showing a hook body portion in the lower thread supplying apparatus of the sewing machine of fig. 2.
The hook body 50 is rotated by receiving rotational power from the transmission part 40, has a cylindrical shape with one side opened, forms a lower thread receiving space inside to store a lower thread, and forms a recess part which cuts a predetermined area along the inner center direction from the outside of the hook body 50 so that a needle which catches the upper thread to fall down cannot interfere with the hook body, and naturally unwinds from the hook body 50 if the upper thread and the lower thread which are hung on the hook body 50 and rotated are wound.
Fig. 5 is a view showing a state in which a separation space is formed between a transmission part and a hook body part in the lower thread supplying apparatus of the sewing machine of fig. 2.
As the driving part 40 is formed obliquely, the more the driving part 40 approaches the upper side part, the larger the separation space from the hook body part 50 may be.
In contrast, as the transmission part 40 approaches the lower side part, it is in close contact with the hook body part 50 in such a manner that a separate space is not formed, and thus, the transmission part 40 can rotate the hook body part 50 by pushing the lower side part of the hook body part 50.
The hook 51 of the hook body portion 50 is ring-shaped for hanging the upper wire U, and the tip of the hook 51 may be biased toward the transmission portion 40 side.
The rotation plate 41 of the transmission part 40 may be inclined by an angle θ, and the transmission part 40 and the hook body part 50 form the widest separation space E in the upper side of the lower thread supplying apparatus 1.
Since the partition space E communicates with the upper thread inlet and outlet of the housing part 10, the needle which hooks the upper thread to move downward passes through the upper thread inlet and outlet of the housing part 10 to enter the partition space E, and in this case, the hook 51 hooks the upper thread and rotates.
The housing portion 60 is for covering the open side of the hook body portion 50, and has an outer edge shape complementary to the planar shape of the lower thread receiving space of the hook body portion 50.
The case portion 60 is coupled to the hook body portion 50 to prevent the yarn ball placed in the yarn receiving space of the hook body portion 50 from being separated to the outside.
Wherein reference numeral 62 denotes a lower thread discharging hole formed at the center of the housing part 60, which causes the lower thread to be discharged from the lower thread receiving space of the hook body part 50.
Fig. 6 to 10 are views schematically showing a state in which a lower thread is supplied from the lower thread supply device of the sewing machine of fig. 1.
As shown in fig. 6 to 10, when the hook body portion 50 rotates, as the lower thread L accommodated in the lower thread accommodating space of the hook body portion 50 is discharged through the lower thread discharge hole 62 formed at the center of the housing portion 60, there is a problem in that the length of the lower thread L hung on the needle N is unstable, and the tension of the lower thread L cannot be maintained.
In particular, in the case of fig. 6, there is a problem in that the tension applied to the lower thread L is excessively large, and in the case of fig. 7, the lower thread L should be stable and in a straightened state, however, the lower thread L is entangled by the hooks hung on the hook main body portion 50, and thus there is a problem in that the sewing is not qualified.
In the case of fig. 9, when the upper thread U is pulled up, the loose portion of the lower thread L is pulled up together with the upper thread U, and thus, a problem of defective sewing occurs.
Prior art literature
Patent literature
Patent document 1: KR 10-2019-0105315A
Disclosure of Invention
Technical problem
The object of the present invention is to provide an internal rotation type sewing device including a crescent hook, which can prevent a thread from being entangled by maintaining tension of the thread supplied to a sewing object, thereby preventing unqualified sewing.
Solution to the problem
In order to achieve the above object, the present invention provides an internal rotation type sewing device including a crescent hook, comprising: a housing part having a hollow cylindrical shape with one side open; a gear part disposed at an open side and an opposite side of the housing part, for receiving rotation power from the driving shaft to rotate; a transmission unit which is housed in the housing unit and receives rotational power from the gear unit to rotate; and a hook body portion including a loop hook for hanging an upper thread, which is accommodated in the housing portion, and which is located closer to an opening side of the housing portion than the transmission portion, and which receives rotational power from the transmission portion to rotate, wherein the inner rotating type sewing device including the crescent hook is characterized in that a lower thread accommodation space is formed in the hook body portion along the same direction as an opening direction of the housing portion, such that a lower thread accommodated in the lower thread accommodation space is discharged from between the hook body portion and the transmission portion and is hung on the upper thread.
In this case, the hook body portion is preferably formed in a cylindrical shape, a recess is formed to be cut from the outside toward the inside center, a hook is formed at one end of the recess, and the distal end of the hook is preferably biased toward the transmission portion side.
And a lower line guide plate is formed at the center of the inner peripheral surface of the concave part, and takes the shape of a plate for guiding the lower line accommodated in the lower line accommodating space between the hook body part and the transmission part.
The lower thread guide plate may be disposed at the center of the inner circumferential surface of the recess, and may have a lower thread discharge hole formed therein to allow a lower thread to pass therethrough.
In the hook body portion, a convex portion is formed in a convex shape at a central portion between a surface of the lower wire receiving space and an opposite surface, and an edge of the convex portion is flat and a plurality of pin receiving holes are formed therethrough.
In the transmission portion, a center portion of a surface facing the hook body portion is a concave recess corresponding to the convex portion of the hook body portion, an edge of the recess is flat, and a plurality of transmission pins corresponding to the plurality of pin receiving holes are formed so as to protrude therefrom, so that rotational power is transmitted to the hook body portion.
The transmission part is arranged in the housing part in an inclined way, and pushes a part of the hook body part to transmit power.
On the other hand, preferably, the gear portion includes: the transmission gear is connected with the driving shaft for rotation; and a rotation gear engaged with the transmission gear and rotated, wherein the transmission unit rotates in synchronization with the rotation gear with a rotation shaft of the rotation gear as a rotation center.
A predetermined separation space is formed between the hook of the hook body and the transmission portion.
In this case, the above-mentioned divided space is used for accommodating a needle which is hooked up to move up and down.
The transmission part is arranged in the housing part in an inclined manner so as to be separated from the hook body part as approaching the upper side part of the internal rotation type sewing device comprising the crescent hook, and a separation space is formed between the transmission part and the hook body part of the upper side part of the internal rotation type sewing device comprising the crescent hook.
The housing portion includes: the bottom is used for placing the transmission part; and a rim portion formed to protrude along an outer edge of the bottom portion at a predetermined height, the rim portion including an upper line inlet and outlet, the rim portion being cut out at a predetermined area to communicate with a space between the transmission portion and the hook body portion.
The detailed description and the accompanying drawings include specific details of other embodiments.
The advantages and/or features of the present invention and the method of accomplishing the same may be apparent from the following various embodiments which are described in detail herein with reference to the accompanying drawings.
However, the present invention is not limited to the structures of the embodiments disclosed below, but may be implemented by different embodiments, and the embodiments disclosed in the present specification complete the disclosure of the present invention and are provided only for fully understanding the scope of the present invention by those skilled in the art to which the present invention pertains, and therefore, it should be understood that the scope of the present invention should be defined based on the scope of the claimed invention.
ADVANTAGEOUS EFFECTS OF INVENTION
The present invention has the following effects that the lower thread accommodating space is formed in the hook body along the same direction as the opening direction of the shell, so that the lower thread accommodated in the lower thread accommodating space is discharged from the position between the hook body and the transmission part and hung on the upper thread, and the lower thread can be prevented from generating winding phenomenon by maintaining the tension of the lower thread supplied to the sewed article.
Moreover, the unqualified sewing caused by unstable tension of the lower thread can be avoided.
Drawings
Fig. 1 is a view showing a prior art lower thread supply device of a sewing machine.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a view showing a transmission part in the lower thread supplying apparatus of the sewing machine of fig. 2.
Fig. 4 is a view showing a hook body portion in the lower thread supplying apparatus of the sewing machine of fig. 2.
Fig. 5 is a view showing a state in which a separation space is formed between a driving part and a hook body part in the lower thread supplying apparatus of the sewing machine of fig. 2.
Fig. 6 to 10 are views schematically showing a state in which a lower thread is supplied from the lower thread supply device of the sewing machine of fig. 1.
Fig. 11 is a view showing an internal rotation type sewing device including a crescent hook of the present invention.
Fig. 12 is an exploded view of fig. 11.
Fig. 13 is a view showing a hook body portion and a driving portion in the internal rotation type sewing device including a crescent hook of fig. 12.
Fig. 14 is a view showing a state in which the hook body portion and the transmission portion of fig. 13 are viewed from opposite directions.
Fig. 15 to 19 are views schematically showing a state in which a lower thread is supplied from the internal rotation type sewing device including the crescent hook of fig. 11.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the course of describing the present invention in detail, the terms or words used in the present specification should not be interpreted in a meaning limited to general or dictionary, the inventors of the present invention can properly define concepts of various terms in order to describe their own invention in an optimal manner, and it should be understood that such terms or words should be interpreted in a meaning and concept conforming to the technical ideas of the present invention.
That is, the terms used in the present specification are used only for illustrating the preferred embodiments of the present invention, and there is no intention to specifically limit the contents of the present invention, and such terms should be construed as terms defined in consideration of the various possibilities of the present invention.
Also, in the present specification, unless clearly defined otherwise, the expression in the singular may include the expression in the plural, and similarly, even if expressed in the plural, it is to be understood that it includes the singular.
Throughout this specification, when a certain structural element is expressed as "including" other structural element, it may mean that any other structural element may be included, unless there is a specific contrary description, and it is not excluded.
Further, when it is indicated that a certain component is "present in" or "connected to" another component, it is understood that the certain component may be directly connected to or in contact with the other component, or may be separated from the other component by a predetermined distance, and in the case of being separated by a predetermined distance, a third component or a third unit for fixing or connecting the corresponding component to the other component may be also present, and the description of such a third component or third unit may be omitted.
Conversely, when a structural element is expressed as being "directly connected" or "directly coupled" to another structural element, it is to be understood that there is no third structural element or third unit in the middle.
Similarly, other expressions such as "between", "directly between", "adjacent to", "directly adjacent to" and the like for describing the relationship between the respective structural elements should be interpreted in the same manner.
In the present specification, terms such as "one surface", "another surface", "one side", "another side", "first" and "second" used for one component are used only for clearly distinguishing one component from other components, and such terms should be understood in a sense that the terms do not limit the corresponding components.
Also, in the present specification, the terms such as "upper", "lower", "left", "right", etc. merely denote relative positions of the respective structural elements with respect to the respective drawings, and such terms should not be construed in a sense of indicating absolute positions unless an absolute position is specified for the positions thereof.
Also, it should be understood that in the description of the present invention, terms such as ",".
In the present specification, in the process of assigning reference numerals to the respective components of the respective drawings, even if the same components are shown in different drawings, the same reference numerals are assigned as much as possible to the same components, that is, the same reference numerals are used for the same components throughout the present specification.
In the present specification, in order to fully and clearly convey the idea of the invention or to facilitate explanation, dimensions, positions, coupling relations, and the like of respective constituent elements constituting the invention in the drawings may be partially enlarged or reduced or omitted, and thus, their specific columns or dimensions may be inaccurate.
In the following description of the present invention, structures that may unnecessarily obscure the gist of the present invention will be omitted, and detailed descriptions related to known techniques including the prior art may be omitted, for example.
Fig. 11 is a view showing an internal rotation type sewing device including a crescent hook of the present invention, and fig. 12 is an exploded view of fig. 11.
The internal rotation type sewing device including the crescent hook of the present invention is combined with a driving shaft D provided at a lower side portion of the sewing machine, receives power from the driving shaft D to rotate, and simultaneously provides a lower thread, which includes a housing portion 100, a gear portion 200, a driving portion 300, and a hook body portion 400.
The housing portion 100 has a hollow cylindrical shape with one side open, and accommodates the transmission portion 300, the hook body portion 400, and the like through the open side.
Although such a housing part 100 may provide a space capable of accommodating the rotating drive shaft D, it is preferable that the housing part 100 should be formed such that a rotational force cannot be directly transmitted to the housing part 100 even in the case where the drive shaft D rotates, and the housing part 100 may include the bottom part 110 and the rim part 120.
The bottom 110 has a substantially circular plate shape, and has a surface formed on the other surface of the housing 100 opposite to the open side thereof for supporting a plurality of members (e.g., the transmission portion 300, the hook body portion 400, etc.) housed in the housing 100.
A plurality of holes are formed in the bottom 110 to accommodate a transmission gear 210, a rotation gear 220, and the like, which will be described below.
The rim 120 may be formed to protrude along the outer edge of the bottom 110 at a predetermined height, and the rim 120 may form an inner space of the case 100 to prevent a plurality of components accommodated in the inner space from being separated to the outside.
The rim 120 includes the upper thread inlet/outlet 122, and is cut in a predetermined area to communicate with the partition space E between the transmission unit 300 and the hook body 400.
Although the shape of the upper line inlet/outlet 122 is not limited to a specific concept, a rectangular shape is preferable.
As the needle N having the upper thread hung thereon can enter the inner space of the housing part 100, the hook H of the hook body part 400 coupled to the housing part 100 and rotated can be hung and rotated through the upper thread inlet and outlet 122 formed in the above-described manner.
The gear portion 200 is placed on the open side and the opposite side of the housing portion 100, and receives rotational power from the drive shaft D to rotate.
That is, one side of the gear part 200 is connected to the driving shaft D of the sewing machine, receives rotational power from the rotating driving shaft D, and transmits the rotational force to the transmission part 300 through engagement with gear teeth.
The gear part 200 rotates a transmission part 300 described below by power received from the driving shaft D, the transmission part 300 is connected to the hook body part 400, and the rotation force of the transmission part 300 rotates the hook body part 400.
The gear portion 200 includes a transmission gear 210 and a rotation gear 220.
The transmission gear 210 is directly connected to the driving shaft D, rotates together by the rotation of the driving shaft D, and transmits power to the rotation gear 220.
The rotation gear 220 is engaged with the transmission gear 210 to rotate, and receives the rotation force supplied to the transmission gear 210 by the rotation of the drive shaft D.
As described above, since the structures of the case portion 100 and the gear portion 200 are similar to or identical to those disclosed in patent application No. 10-2018-0025712 invented and applied by the present inventor, a more detailed description will be omitted.
On the other hand, the transmission unit 300 is housed in the case unit 100, receives rotational power from the gear unit 200, rotates, and rotates in synchronization with the rotation gear 220 with the rotation shaft of the rotation gear 220 as the rotation center. The transmission part 300 will be described in detail with reference to fig. 13 and 14.
The hook body 400 is accommodated in the housing 100, and is located closer to the open side of the housing 100 than the transmission 300, and is rotated by receiving rotational power from the transmission 300, and includes an annular hook H for hanging an upper wire.
The hook body 400 will be described in detail with reference to fig. 13 and 14.
Fig. 13 is a view showing a hook body portion and a driving portion in the internal rotation type sewing device including a crescent hook of fig. 12, and fig. 14 is a view showing a state in which the hook body portion and the driving portion of fig. 13 are viewed from opposite directions.
The hook body 400 is rotated by receiving rotational power from the transmission unit 300, has a cylindrical shape with one side opened, and forms a lower thread accommodating space 410 along the same direction as the opening direction of the housing 100.
As described above, the lower thread received in the lower thread receiving space 410 can be discharged from between the hook body part 400 and the transmission part 300 and hung on the upper thread.
The hook body 400 is formed with a recess 420 formed in a cylindrical shape so as to cut a predetermined area from the outside toward the inside center so that a needle caught by an upper thread cannot interfere with the hook body 400, and when the upper thread and the lower thread hung on the hook body 400 and rotated are wound, they are naturally unwound from the hook body 400.
The planar shape of the hook body portion 400 may be U-shaped due to the above-described recess 420.
Preferably, an annular hook H is formed at one end of the recess 420, and the end of the hook H is biased toward the transmission part 300 side.
As described above, the overall shape of the hook body 400 is a crescent shape, and thus may be also referred to as a "crescent hook".
On the other hand, a lower line guide plate P is formed in a plate shape at the center of the inner circumferential surface of the recess 420 for guiding the lower line received in the lower line receiving space 410 between the hook body part 400 and the driving part 300.
The lower thread guide plate P is disposed longitudinally at the center of the inner circumferential surface of the recess 420, and a lower thread discharge hole G through which a lower thread passes is formed in the lower thread guide plate P.
The reference numeral S, which is not described, denotes a fixing slider for fixing a bobbin case (not shown) to the lower thread receiving space 410 of the hook body 400.
In the hook body 400, a convex portion 430 is formed in a convex shape at a central portion between the opposite surface and the surface of the lower wire housing space 410, and a plurality of pin housing holes 440 are formed to penetrate the edge of the convex portion 430 in a flat shape.
The pin receiving hole 440 is a hole penetrating from one surface of the hook body 400 to the other surface, and receives the driving pin 330 formed in the driving part 300.
Although the shape of the pin receiving hole 440 is not limited based on a specific concept, the driving pin 330 is preferably hemispherical in shape and the pin receiving hole 440 is preferably circular in shape in order to simplify the receiving.
Further, since the positions and the number of the pin receiving holes 440 should be considered in consideration of the structure in which the pin receiving holes 440 are coupled to the driving pin 330, it is preferable that a plurality of pin receiving holes are formed at positions corresponding to the hook body 400 of the driving pin 330.
On the other hand, a predetermined space E is formed between the hook H of the hook body 400 and the transmission part 300, and in this case, the space E accommodates a needle which hooks up and down.
In the upper side portion of the internal rotation type sewing device including the crescent hook, the transmission part 300 forms the widest separation space E with the hook body part 400.
Since the above-mentioned partitioned space E communicates with the upper thread inlet and outlet 122 of the housing part 100, the needle hooking the upper thread to move downward enters the above-mentioned partitioned space E through the upper thread inlet and outlet 122 of the housing part 100, and in this case, the hook H hooks the upper thread and rotates.
The transmission part 300 rotates in synchronization with the rotation gear 220 with the rotation shaft of the rotation gear 220 as a rotation center, and is formed inside the housing part 100 to be inclined, so that power can be transmitted by pushing a part of the hook body part 400.
As the transmission part 300 is formed obliquely in this way, the space separating the hook body 400 increases as the transmission part 300 approaches the upper side, whereas the transmission part 300 comes into close contact with the hook body 400 as the transmission part approaches the lower side so that the space E is not formed.
This can be regarded as the transmission part 300 rotating the hook body part 400 by pushing the lower side part of the hook body part 400.
In the transmission portion 300, the center portion of the surface facing the hook body portion 400 is a concave recess 310 corresponding to the convex portion 430 of the hook body portion 400.
The edge of the recess 310 is flat, and a plurality of driving pins 330 corresponding to the pin receiving holes 440 are protruded to transmit rotation power to the hook body 400.
As described above, the driving pin 330 should preferably have a hemispherical shape, but may be formed in other shapes.
Also, this may be considered to include various embodiments in which the spacing between the plurality of drive pins 330 may or may not be constantly set.
As described above, it is preferable that the driving pins 330 may push the lower side of the hook body part 400 to rotate the hook body part 400, and in order to simplify transmission of the rotational force, the interval between the adjacent driving pins 330 may be formed to be narrower at the lower side of the driving part 300 than at the upper side of the driving part 300.
Fig. 15 to 19 are views schematically showing a state in which a lower thread is supplied from the internal rotation type sewing device including the crescent hook of fig. 11.
In the case where the lower thread L is supplied to the sewn article, it is particularly important to determine the sewing quality by stably maintaining the tension of the lower thread L.
Since the separation space E between the transmission part 300 and the hook body part 400 is in communication with the upper thread inlet and outlet 122 of the housing part 100, the needle N hooking the upper thread U to move downward enters the separation space E through the upper thread inlet and outlet 122 of the housing part 100, and in this case, the hook H hooks the upper thread U and rotates.
As shown in fig. 15 to 19, as the lower thread L stored in the lower thread storing space 410 of the hook body 400 is discharged from between the hook body 400 and the transmission part 300 and is caught by the upper thread U, the lower thread L is prevented from being wound by maintaining the tension of the lower thread L supplied to the sewn article, and thus, the sewing failure due to the unstable tension of the lower thread L can be prevented.
Although the preferred embodiments of the present invention have been described above by way of some examples, this is merely an example of various embodiments described in "detailed description" of the invention, and those skilled in the art to which the present invention pertains can implement the present invention by making various modifications from the above description, and therefore should be understood to be capable of implementing the equivalent embodiments of the present invention.
Moreover, since the present invention can be realized by other embodiments, the present invention is not limited to the above description, and the disclosure for the present invention is complete only to provide a full understanding of the scope of the present invention to those of ordinary skill in the art, and therefore, it is to be understood that the scope of the present invention should be defined based on the scope of the claimed invention.
Description of the reference numerals
100: housing part
110: bottom part
120: edge portion
122: go up line access & exit
200: gear part
210: transmission gear
220: rotary gear
300: transmission part
310: concave part
330: transmission pin
400: hook body part
410: lower line accommodating space
420: recess portion
430: convex part
440: pin receiving hole
U: wire feeding
L: offline
N: needle
E: separating space
D: driving shaft
H: hook
P: lower line guide plate
G: lower line discharge hole
S: spool shell fixed sliding sheet
Claims (10)
1. An internal rotation type sewing device comprising a crescent hook, comprising:
a housing part having a hollow cylindrical shape with one side open;
a gear part disposed at an open side and an opposite side of the housing part, receiving rotational power from a driving shaft to rotate;
a transmission unit which is housed in the housing unit and which receives rotational power from the gear unit to rotate; and
a hook body part comprising an annular hook for hanging an upper wire, which is accommodated in the shell part and is closer to the open side of the shell part than the transmission part, receives rotary power from the transmission part to rotate,
the internal rotation type sewing device comprising the crescent hook is characterized in that,
a lower thread receiving space is formed in the hook body portion along the same direction as the opening direction of the housing portion,
so that the lower thread accommodated in the lower thread accommodating space is discharged from the position between the hook body part and the transmission part and hung on the upper thread, the lower thread is prevented from winding by maintaining the tension of the lower thread supplied to the sewed article,
the hook body part is in a cylindrical shape, a concave part is formed by cutting from the outer side to the inner side in the center direction, a hook is formed at one end of the concave part, the tail end of the hook is biased to the transmission part side,
a lower line guide plate is formed at the center of the inner circumferential surface of the recess part, and takes a shape of a plate for guiding the lower line received in the lower line receiving space between the hook body part and the transmission part.
2. The internal rotation type sewing apparatus including a crescent moon hook according to claim 1, wherein the lower thread guide plate is longitudinally arranged at the center of the inner circumferential surface of the recess, and a lower thread discharge hole through which a lower thread passes is formed at the lower thread guide plate.
3. The internal rotation type sewing apparatus including a crescent moon hook according to claim 1, wherein a convex portion having a convex shape is formed in a central portion between a face and an opposite face of the lower thread receiving space in the hook body portion, an edge of the convex portion has a flat shape, and a plurality of pin receiving holes are formed therethrough.
4. The internal rotation type sewing device including a crescent hook according to claim 3, wherein in the transmission portion, a central portion of a face facing the hook body portion is a concave-shaped recess corresponding to a convex portion of the hook body portion, an edge of the recess is flat-shaped, and a plurality of transmission pins corresponding to the plurality of pin receiving holes are formed protruding to transmit rotational power to the hook body portion.
5. The internal rotation type sewing apparatus including a crescent moon hook according to claim 4, wherein the transmission part is disposed obliquely inside the housing part, pushing a part of the hook body part to transmit power.
6. An internal rotation type sewing apparatus including a crescent moon according to claim 1, wherein,
the gear portion includes:
the transmission gear is connected with the driving shaft for rotation; and
a rotating gear engaged with the transmission gear for rotation,
the transmission unit rotates in synchronization with the rotation gear with the rotation shaft of the rotation gear as a rotation center.
7. The internal rotation type sewing apparatus including a crescent moon hook according to claim 1, wherein a prescribed separation space is formed between the hook and the transmission part.
8. The internal rotation type sewing apparatus including a crescent moon hook according to claim 7, wherein the partition space is for accommodating a needle hooked to move up and down.
9. The internal rotation type sewing device including a crescent moon according to any one of claims 1 to 8, wherein the transmission part is disposed obliquely inside the housing part in such a manner as to be spaced apart from the hook body part as approaching an upper side part of the internal rotation type sewing device including a crescent moon, and a separation space is formed between the transmission part and the hook body part of the upper side part of the internal rotation type sewing device including a crescent moon.
10. The internal rotation type sewing apparatus including a crescent moon according to claim 9, wherein,
the housing portion includes:
the bottom is used for placing the transmission part; and
a rim portion formed to protrude along an outer edge of the bottom portion at a predetermined height,
the edge portion includes an upper line inlet and outlet, and is opened in a predetermined area to communicate with a space between the transmission portion and the hook body portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2020-0063844 | 2020-05-27 | ||
| KR1020200063844A KR102276467B1 (en) | 2020-05-27 | 2020-05-27 | Internal rotating sewing apparatus with crescent hook |
| PCT/KR2021/095062 WO2021242084A1 (en) | 2020-05-27 | 2021-05-26 | Internally rotatable sewing device including crescent hook |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115087771A CN115087771A (en) | 2022-09-20 |
| CN115087771B true CN115087771B (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180013500.7A Active CN115087771B (en) | 2020-05-27 | 2021-05-26 | Internal rotation type sewing device comprising crescent hooks |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7473995B2 (en) |
| KR (1) | KR102276467B1 (en) |
| CN (1) | CN115087771B (en) |
| WO (1) | WO2021242084A1 (en) |
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- 2021-05-26 JP JP2022536666A patent/JP7473995B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2021242084A1 (en) | 2021-12-02 |
| JP7473995B2 (en) | 2024-04-24 |
| JP2023509353A (en) | 2023-03-08 |
| CN115087771A (en) | 2022-09-20 |
| KR102276467B1 (en) | 2021-08-11 |
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