KR200492574Y1 - Bobbin holding device - Google Patents

Abstract

The present invention intends to provide a bobbin fixing device (1) in which mounting and detachment of the bobbin (B) wound with the filament (P) is extremely easy, and the present invention is to provide a rotating shaft (2) to which the bobbin (B) is coupled. ) Is elastically supported to wrap around the rotation shaft (2) with a predetermined distance back and forth on the outer circumferential surface of the circumferential surface, and has elasticity so that when the bobbin (B) is coupled to the rotation shaft (2), it is pressed between the rotation shaft (2) and the bobbin (B). A plurality of O-rings (3) and the O-ring (3) is coupled to the front of the outer peripheral surface of the rotating shaft (2), the O-ring (3) is formed to be rolled a predetermined distance forward and backward transfer groove (4), and the outer peripheral surface of the rotating shaft (2) O-ring (3) is coupled to the rear, the rear transfer groove (5) is formed so that the O-ring (3) is rolled a predetermined distance back and forth, and a gap formed protruding to be divided between the front transfer groove (4) and the rear transfer groove (5) It is characterized by including a holder (6), and according to this design, it is extremely easy to mount and remove the bobbin (B) from the rotation shaft (2), thereby enhancing the convenience of use, and the bobbin when rotating the rotation shaft (2). (B) does not slip, maximizes operational reliability, prevents frequent breakdowns through a simple structure and simple production, prolongs the life of the product, reduces manufacturing costs, and increases production. There is.

Description

Bobbin holding device

The present design is for a bobbin fixing device, and if this is described in more detail, the bobbin with a filament wound can be mounted and removed very easily, while the bobbin is arbitrarily separated to prevent damage by falling, and the bobbin rotates at will. It relates to a bobbin fixing device that prevents the filament wound around the bobbin from unwinding arbitrarily.

In general, various fine threads such as filaments (hereinafter collectively referred to as filaments) are wound on a bobbin and stored and transported, and the filament is unwound and supplied to the place of use while it is wound around the bobbin.At this time, the bobbin wound with the filament is rotated. It was installed on a) shaft or a support shaft to unwind or rewind the filament from the bobbin.

As for the fixing device of the conventional bobbin, as published in Korean Utility Model 2010 No. 1109 (published on February 2, 2010) or 2013 Patent Publication No. 26848 (published on March 14, 2013), A hole-dang device has been developed to fix the branch pipe (= bobbin) by the expanded tube by injecting air into the inside of the mounting base shaft and supplying it to the outer edge of the mounting base shaft to expand the tube. As in Patent Publication No. 4,605, 2018 (published on May 8, 2018), a tube-type bobbin fixing device in which an elastic housing is coupled to the outside of the main body housing has been previously applied, and such a tube-type bobbin fixing device is air The tube was inflated to fix the outer bobbin.It takes time to inject and remove air, such as when the bobbin is assembled or when the filament wound around the bobbin is unwound and removed for replacement. It is not supported, and has a number of problems, such as an increase in manufacturing cost or equipment cost because the fixing device itself is complicated or an auxiliary device for supplying air is required because an internal opening and closing means and an air injection device must be provided.

In addition, as published in Korean Patent Application Publication No. 95194 (published on August 28, 2012), the shaft fixing member of the rotating shaft is inserted into the exposed groove of the bobbin and fixed after combining the bobbin part to the rotating shaft instead of injecting air. Technology was developed, and the technology of fixing the bobbin to the rotating shaft with a fixing part made of a shaft fixing member and an exposed groove is an air compressor for supplying air compared to the tube-type fixing device. There was an effect of slightly reducing the equipment cost because an air hose supplying the bobbin was not required, but the technology of fixing the bobbin to the rotating shaft by such a fixing part cannot use the bobbin that was previously used, and a new exposed groove of the fixing part is formed. Since the bobbin is provided and the shaft fixing member of the fixing part must also be provided with a rotating shaft installed at the tip, the manufacturing cost is also high and it is difficult to apply it to bobbins of various sizes or shapes.

KR 20-2010-0001109 U 2. 2. KR 10-2013-0026884 A 2013. 3. 14. KR 10-2018-0046059 A May 8, 2018 KR 10-2012-0095194 A August 28, 2012

In the present design, a new technology has been created to solve the problems of the prior art. The present design makes it extremely easy to mount and remove the bobbin with a filament wound around the rotating shaft, while the slip between the rotating shaft and the bobbin during rotation ( It was completed with the task to be solved in the design to provide a bobbin fixing device that can minimize slip).

In addition to this, the overall configuration is remarkably simplified, and thus production can be made quickly, so that the production volume can be significantly improved, there is no residual breakdown due to the simple structure, and only one part can be replaced simply during long-term use. It can be done as an assignment.

In addition, although not described separately, other purposes within the scope that can be inferred in consideration of the specific contents and claims and drawings for implementing the following design, which describes in detail the bobbin fixing device of the present design, It is included in the task.

As a specific means for solving the problems of the above design, in the present design, a bobbin fixing device is configured, and the bobbin fixing device of the present design is provided with a rotation shaft penetrating through a hollow formed in the center of the bobbin where the filament is wound, It is coupled to be elastically supported so as to wrap around the rotation shaft at a predetermined distance back and forth on the outer circumferential surface of the rotation shaft, and a plurality of O-rings having elasticity are provided so as to be pressed between the rotation shaft and the bobbin when the bobbin is coupled to the rotation shaft, and in front of the outer circumferential surface of the rotation shaft When the O-ring is combined and the bobbin is removed, the O-ring is inserted inward from the outer circumferential surface of the rotating shaft so that the pressurized O-ring is rolled over a predetermined distance before and after the bobbin. When the O-ring is detached, the pressurized O-ring is inserted inward from the outer circumferential surface of the rotating shaft so that it can be rolled a predetermined distance, and a rear transfer groove formed continuously for a certain period is provided, and it protrudes outward between the front transfer groove and the rear transfer groove to transfer forward. It is characterized in that it is formed so as to partition the groove and the rear transfer groove, characterized in that the O-ring coupled to the front transfer groove and the O-ring coupled to the rear transfer groove is provided with a spacing retainer configured to maintain a predetermined distance.

In the present invention, the front and rear lengths of the front transfer grooves may be formed to be longer than the front and rear lengths of the rear transfer grooves. In addition, the front transfer grooves and the rear transfer grooves are spaced between the front transfer grooves and the rear transfer grooves. It is characterized in that it is characterized in that it is characterized in that it is characterized in that it is characterized in that it is further provided with an intermediate conveying groove formed continuously for a certain period while being separated from each of the conveying grooves, and being inserted into the inner side of the rotating shaft so that the O-rings are combined to allow the pressurized O-rings to roll over a predetermined distance before and after the bobbin. I can.

The present invention is formed in any one or two or more of the front transfer groove, rear transfer groove, and intermediate transfer groove so that the rear side diameter is smaller than the front side diameter so as to be inclined from the front to the rear side, and when the O-ring is located on the front side, the outer peripheral surface of the rotation shaft It protrudes more and protrudes relatively less than the outer circumferential surface of the rotating shaft when it is located on the rear side, and when the bobbin is coupled to the rotating shaft, the O-ring is smoothly transferred to the rear, and the degree of protrusion is small at the rear end, so it is pressed by the inner surface of the bobbin. It may be characterized in that it is configured to prevent deformation and breakage of the O-ring when the degree is reduced so that the O-ring can no longer be transferred to the rear side because it is caught on the outer side of the rotation shaft or the gap maintaining unit.

In addition, when the bobbin is combined with a rotating shaft at any one of the front transfer groove, rear transfer groove, and intermediate transfer groove, or at the rear end of two or more, the O-ring, which is pressed and rolled backward, minimizes the area in contact with the surface of the O-ring during rolling. It is configured to be configured to prevent the deformation and damage of the O-ring when it is caught on the outer side of the rotation shaft or the space retainer and can no longer be transferred to the rear, it may be characterized in that it is further provided with slip induction irregularities.

According to the specific means for solving the above-described problem, the bobbin fixing device of the present invention has an O-ring configured to be pressurized to be interposed between the rotating shaft and the bobbin, respectively, in the front and rear of the rotating shaft, and the flow formed so that the O-ring moves back and forth when the bobbin is detached. The groove is included so that the bobbin is elastically supported by the rotation shaft by O-rings before and after the rotation shaft, so that the bobbin can be mounted and removed from the rotation shaft so that it is extremely easy to use, and the bobbin does not slip when the rotation shaft is rotated. By fixing it, it has the effect of maximizing the reliability of operation because it can prevent the bobbin from slipping on the rotating shaft.

In addition, in the present design, a bobbin is fixedly coupled to the rotating shaft, and a plurality of O-rings respectively coupled before and after the outer circumferential surface of the rotating shaft, and a flow groove formed inwardly at a predetermined distance before and after the outer circumferential surface of the rotating shaft so that the O-rings can flow back and forth for a certain period, and By allowing the bobbin to be firmly coupled and supported with a simple structure in which the front and rear O-rings are spaced apart at regular intervals by means of a gap maintenance hole between the front and rear flow grooves, the production is easy and quick to manufacture, thus significantly reducing the manufacturing cost. It has an effect that can significantly improve production.

In addition, the simple structure and simple production have the effect of prolonging the life of the product while preventing frequent breakdowns, and if the coupling force between the rotating shaft and the bobbin decreases due to long-term use of the O-ring, which is extremely easy to replace on the rotating shaft, Even if only the O-ring is replaced, it is possible to increase the coupling force and support force between the bobbin and the rotating shaft to the original state (the initial state of the device).

1 is a three-dimensional view showing a preferred example of the present invention
2 is a partial cross-sectional configuration diagram of FIG. 1
3A to 3C are exemplary views showing an action in which a bobbin is coupled to the present invention of FIG. 2
4A to 4C are exemplary views showing the action of separating the bobbin in the present invention of FIG. 2
5 is a three-dimensional view showing another example of the present invention
6 is a partial cross-sectional configuration diagram of FIG. 5
7A to 7C are exemplary views showing the action of coupling the bobbin to the fixing device of FIG. 6
8A to 8C are exemplary views showing the action of separating the bobbin in the present invention of FIG. 6
9 is a three-dimensional view showing another example of the present invention
10 is a partial cross-sectional view of FIG. 9
11 is an exemplary view showing that the driving groove is configured to be inclined in the present invention
Figure 12 is an exemplary view showing that the departure section of the O-ring is formed in the rearmost of the driving groove in the present invention

The present design makes it extremely easy to mount and separate the bobbin wound with various filaments, but prevent the bobbin from being damaged by dropping by randomly separating the bobbin. It prevents the bobbin from rotating at will, so that the filament wound around the bobbin is randomly unwound. It is intended to provide a bobbin fixing device to prevent this, and it will be described in more detail with the drawings below, but the accompanying drawings are only examples for easily explaining the content and scope of the technical idea of the present invention, and are limited thereto. The terms used are not intended to be construed as being limited to the corresponding terms as well, only to specifically describe the embodiments.

The bobbin fixing device 1 of the present invention is a plurality of O-rings (3) that are coupled back and forth to the rotation shaft (2) to which the bobbin (B) in which various filaments (P) are wound, as shown in FIGS. 1 to 2 And, the O-ring (3) is combined to be rolled back and forth when the bobbin (B) is detached, the rotation shaft (2) front and rear transfer grooves (4) and rear transfer grooves (5) formed inside the outer circumferential surface inward, respectively It includes a spacing tool 6 formed to be divided by protruding outward between the transfer groove 4 and the rear transfer groove.

To explain this in more detail, the rotation shaft 2 is made to be coupled to penetrate through the hollow (B1) (中空) formed through the middle of the bobbin (B), and the rotation shaft ( 2) The O-ring (3) surrounding the circumference is coupled to be elastically supported, and this O-ring (3) is pressed between the rotating shaft (2) and the bobbin (B) when the bobbin (B) is coupled to the rotating shaft (2). It has its own elasticity.

At this time, the O-ring (3) is coupled to each of the front transfer groove (4) and the rear transfer groove (5) of the rotation shaft (2) to be rolled back and forth, and the front transfer groove (4) is more than the rear transfer groove (5). When the bobbin (B) is coupled as it is located at the front end of the rotation shaft (2), the O-ring (3) of the front transfer groove (4) first touches the inner surface of the hollow (B1) of the bobbin (B).

If this is explained separately, the O-ring (3) is coupled to the front of the outer peripheral surface of the rotation shaft (2) in the front transfer groove (4), so that the O-ring (3) pressed by the bobbin (B) when the bobbin (B) is removed is front and rear. It is inserted inward from the outer circumferential surface of the rotating shaft 2 so that a predetermined distance is rolled and is formed continuously for a certain period, and the rear transfer groove 5 is coupled to the O-ring 3 behind the outer circumferential surface of the rotating shaft 2 ) When the O-ring 3 is pressed by the bobbin B, it is inserted inward from the outer circumferential surface of the rotating shaft 2 so as to be rolled a predetermined distance before and after the bobbin (B) and formed continuously for a certain period.

And, between the front transfer groove 4 and the rear transfer groove 5, the front transfer groove 4 and the rear are protruded outward and have the same diameter as the outer circumferential surface of the rotation shaft 2. The transfer groove 5 is formed to be bent, and in Figs. 1 to 2, as an example in which the clearance holder 6 is positioned in the middle of the front and rear of the rotation shaft 2, this clearance holder 6 is the forward transfer groove ( This is a configuration for preventing the O-rings 3 from coming into contact with each other by maintaining a predetermined distance between the O-rings 3 coupled to the 4) and the O-rings 3 coupled to the rear transfer groove 5.

In the case of combining the bobbin (B) as shown in FIGS. 3A to 3C in the present invention of this structure, first, as shown in FIG. 3A, the O-ring 3 is placed in front of each of the front transfer groove 4 and the rear transfer groove 5 The bobbin (B) is coupled to the front end of the rotating shaft (2) by transporting the bobbin (B), and thereafter, the O-ring (3) between the inner surface of the hollow (B1) of the bobbin (B) and the front transfer groove (4) of the rotating shaft (2) as shown in Fig. ) Is pressed and the O-ring (3) is pressed and rolled from the front transfer groove (4) and is transferred to the rear, and when the bobbin (B) is completely pushed to the rotation shaft (2) as shown in Fig. 3c, the rotation shaft (2) is transferred to the rear. The O-ring (3) coupled to the groove (5) is also pressed by the bobbin (B) and is transferred while rolling backward in the rear transfer groove (5), so that the O-rings of each of the front transfer groove (4) and the rear transfer groove (5) ( 3) The bobbin (B) is completely transferred to the rear end by the O-ring (3) of the front transfer groove (4) and the O-ring (3) of the rear transfer groove (5) before and after the rotation shaft (2). The combination is made to be fixed and supported.

Afterwards, the filament (P) of the bobbin (B) is unwound by the rotation of the rotating shaft (2) and used in the place of use. When all the filaments (P) are unwound from the bobbin (B), a new bobbin (B) with the filament (P) wound. For replacement by separating the bobbin (B) from the rotation shaft (2) as shown in Figs. 4a to 4c, but pulling the bobbin (B) rearward in the fully coupled state of Fig. 4a, first as shown in Fig. 4b The rear feed groove (5), the rear O-ring (3) and the front feed groove (4), the O-ring (3) at the rear end are transferred while rolling forward in a pressurized state, and then the bobbin (B) is continued as shown in Fig. 4c. When pulled out, the O-ring (3) is rolled to each end of the rear feed groove and the front feed groove (4), so that the bobbin (B) is completely separated from the rotating shaft (2).

As another example of the present invention, as shown in Figs. 5 to 6, the distance maintenance port 6 between the front transfer groove 4 and the rear transfer groove 5 of the rotation shaft 2 is toward the rear transfer groove 5 It can be configured to be pushed to the rear of the position so that the O-ring (3) of the front transfer groove (4) is transferred back and forth, the transfer distance (ℓ1) of the front transfer groove (4) is the rear transfer groove ( The O-ring (3) of 5) is configured to be longer than the transfer distance (ℓ2) of the rear transfer groove (5), which is the length before and after being transferred back and forth.

This is because when the bobbin (B) is coupled to the rotation shaft (2) in FIGS. 7A to 7C, the O-ring (3) located at the front end of the front transfer groove (4) is first pressed by the bobbin (B) as shown in FIG. 7A. As described above, while the bobbin (B) rolls the O-ring (3) from the front transfer groove (4) to the rear, the O-ring (3) located at the front end of the rear transfer groove (5) is not transferred by the bobbin (B), Thereafter, as the bobbin (B) is completely coupled as shown in Fig. 7c, the O-ring (3) at the front end of the rear transfer groove (5) is pressed and rolled to the rear. Since it is continuously transferred backward by B), the distance to which the O-ring (3) of the front transfer groove (4) is transferred is large, so that the transfer distance (ℓ1) of the front transfer groove (4) is reduced to the rear transfer groove (5). If the configuration is longer than the transfer distance (ℓ2), the bobbin (B) can be more smoothly coupled to the rotating shaft (2).

8A to 8C, when the bobbin (B) is separated from the rotation shaft (2), each O-ring (3) located at the rear end of the rear transfer groove (5) and the front transfer groove (4) is It is pressed by the bobbin (B) and rolls forward, and when the bobbin (B) is completely separated, the O-ring (3) is transferred back to the front end of the rear transfer groove (5) and the front transfer groove (4) to be located. .

As another example of the present invention, as shown in Figs. 9 to 10, the front transfer groove 4 and the rear transfer groove 5 are spaced between the front transfer groove 4 and the rear transfer groove 5 as shown in Figs. (4) And the rear transfer groove (5) and the intermediate transfer groove (7) is formed, respectively partitioned between the front transfer groove (4) and the rear transfer groove (5) to maintain a predetermined distance, such an intermediate transfer The groove 7 is also coupled with the O-ring 3 like the front transfer groove 4 and the rear transfer groove 5 so that the pressurized O-ring 3 rolls a predetermined distance back and forth when the bobbin B is removed. It is formed continuously for a certain period by being inserted inward from the outer peripheral surface of 2).

At this time, preferably, the transfer distance (ℓ1) of the front transfer groove (4) is longer than the transfer distance (ℓ2) of the rear transfer groove (5), and the O-ring (3) of the intermediate transfer groove (7) is The transfer distance (ℓ3) of the intermediate transfer groove (7) before and after being transferred is shorter than the transfer distance (ℓ1) of the front transfer groove (4), and is longer than the transfer distance (ℓ2) of the rear transfer groove (5). Again, this is because the longer the contact time for rolling backwards in contact with the bobbin B when it is coupled to the rotation shaft 2 is in contact with the bobbin B, the longer the distance to be transported to the rear becomes.

In the above drawings, one O-ring 3 is coupled to each of the front transfer groove 4, the rear transfer groove 5, and the intermediate transfer groove 7 of the rotation shaft 2, but the forward transfer groove is, if necessary, (4), the rear transfer groove (5), the intermediate transfer groove (7) in any one or two or more to surround the plurality of O-rings (3) to be elastically supported to be combined.

In the present invention, the front transfer groove 4, the rear transfer groove 5 and the intermediate transfer groove 7 can be configured to be inclined rearward by θ° as shown in FIG. 11, and the front transfer groove 4 ), rear transfer groove (5), intermediate transfer groove (7) in any one or two or more inclined from the front to the rear side diameter is formed smaller than the front side diameter, when the O-ring (3) is located on the front side It protrudes a lot from the outer peripheral surface of the rotary shaft 2 (h1), and when it is located on the rear side, it protrudes less from the outer peripheral surface of the rotary shaft 2 (h2) so that the rear is relatively less protruded than the front, so that the bobbin (B) is When the O-ring (3) is connected to the rotating shaft (2), the O-ring (3) is smoothly transferred to the rear, and the degree of protrusion is small at the rear end, so the degree of pressure is reduced by the inner surface of the bobbin (B). It is configured to prevent the change and breakage of the O-ring (3) when it is caught in the gap retainer (6) and can no longer be transferred to the rear.

Along with this, as shown in FIG. 12, the bobbin (B) is coupled to the rear end of each of two or more of the front transfer groove (4), the rear transfer groove (5), and the intermediate transfer groove (7) by a rotation shaft (2). The O-ring (3), which is pressurized and rolled backwards, is configured to slip by minimizing the area in contact with the surface of the O-ring (3) during rolling, so that it is caught on the outer side of the rotation shaft (2) or by the gap holder (6), When it cannot be transported, the slip guide irregularities 8 may be provided to prevent deformation and damage of the O-ring 3.

The slip induction concave and convex (8) is formed on the outer circumferential surface at the rear end of the front transfer groove (4), the rear transfer groove (5), and the intermediate transfer groove (7), or together with the front transfer groove (4) or the intermediate transfer groove (7) ) The O-ring (3) is formed on the front or rear transfer groove (5) of the rear end (6) and the outer periphery of the rear end (2), so that the O-ring (3) does not make surface contact with any of the rotation shafts (2). It protrudes in the form of a semicircle or a triangle that can minimize the shape and the gap is made to settle, forming irregularities.

The bobbin fixing device 1 of the present invention configured as described above has a front transfer groove 4 and a rear transfer groove 5 formed to be inwardly inserted on the outer circumferential surface of the rotating shaft 2, and in addition to the intermediate transfer groove 7 The bobbin (B) can be easily mounted and removed from the rotating shaft (2) by simply connecting the O-rings (3) protruding from the outer circumferential surface of the rotating shaft (2) so that the manufacturing cost is significantly reduced and the production rate is significantly improved. The bobbin (B) is separated from the rotating shaft (2) and prevented from falling, preventing damage, and the bobbin (B) is ineffective when the rotating shaft (2) rotates. It provides a lot of efficacy, such as being able to unwind the filament (P) wound around the bobbin (B) uniformly by not turning it.

In addition, due to the simple structure and simple production as described above, the product's lifespan is not prone to failure, and when the present invention is used for a long time, the coupling force and support between the rotating shaft (2) and the bobbin (B) are improved. It is rapidly degraded.At this time, even if only the O-ring (3), which is extremely easy to replace on the rotating shaft (2), can be replaced, the bonding and supporting force between the bobbin (B) and the rotating shaft (2) can be increased to the original state when the device was first installed. It is to provide a variety of benefits, such as having a

As described above, in the detailed description of the present invention, the most preferred embodiment of the present invention has been described, but various modifications may be implemented within the scope not departing from the technical scope of the present invention. It is not limited to the examples, and the scope of protection should be recognized from the technologies of the utility model registration claims to be described later and from these technologies to equivalent technical means.

P: Filament B: Bobbin B1: Hollow
1: Bobbin fixing device
2: rotating shaft
3: O-ring
4: Forward transfer groove
5: Rear transfer groove
6: Gap maintenance area
7: Intermediate transfer home
8: slip induction irregularities

Claims (5)

A rotation shaft 2 penetrating through the hollow (B1) formed through the middle of the bobbin (B) on which the filament (P) is wound;
It is coupled to be elastically supported so as to wrap around the rotation shaft 2 at a predetermined interval on the outer circumferential surface of the rotation shaft 2, and when the bobbin B is coupled to the rotation shaft 2, it is pressed between the rotation shaft 2 and the bobbin B. A plurality of O-rings (3) having elasticity as possible;
O-ring (3) is coupled in front of the outer peripheral surface of the rotating shaft (2), so that when the bobbin (B) is detached, the pressurized O-ring (3) is inserted inside the outer circumferential surface of the rotating shaft (2) so that it is rolled a predetermined distance forward and backward. A forward transfer groove 4 formed to be formed;
O-ring (3) is coupled to the rear of the outer circumferential surface of the rotating shaft (2) so that when the bobbin (B) is removed, the pressurized O-ring (3) is inserted inward from the outer circumferential surface of the rotating shaft (2) so that it is rolled a predetermined distance before and after a certain period. A rear transfer groove 5 formed to be formed;
It protrudes outward between the front transfer groove (4) and the rear transfer groove (5) and is formed to partition the front transfer groove (4) and the rear transfer groove (5), and the O-ring (3) coupled to the front transfer groove (4) ) And the O-ring (3) coupled to the rear transfer groove (5) is configured to maintain a predetermined distance (6);
The front transfer groove (4) and the rear transfer groove (5) are spaced apart from each other by a space retainer (6) between the front transfer groove (4) and the rear transfer groove (5), and the O-ring (3) is combined (B) an intermediate transfer groove 7 formed continuously for a predetermined period while being inserted inward from the outer circumferential surface of the rotating shaft 2 so that the pressed O-ring 3 is rolled a predetermined distance before and after the detachment of (B);
Bobbin fixing device, characterized in that included.
The method according to claim 1;
A bobbin fixing device, characterized in that the rear side diameter is formed smaller than the front side diameter so as to be inclined from the front to the rear in any one or two or more of the front transfer groove 4, the rear transfer groove 5, and the intermediate transfer groove 7.
The method according to claim 1;
When the bobbin (B) is combined with the rotary shaft (2) at any one or two or more of the front feed groove (4), the rear feed groove (5), and the intermediate feed groove (7), an O-ring ( 3) slip induction irregularities (8) configured to slip when rolling;
Bobbin fixing device, characterized in that further included.
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