JPH045508Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a yarn cutting and gripping device, and more specifically, the present invention relates to a yarn cutting and gripping device. The present invention relates to a yarn cutting and gripping device that is used in engagement with the bobbin when the yarn is guided and wound by a tool.

[Conventional technology]

Conventionally, there are two methods for winding yarn around a bobbin: a yarn catching groove is formed on the surface near the end of the bobbin to grasp a portion of the yarn, and then the yarn is wound, and the other is to cut the yarn at the end of the bobbin. There is a method of using it by attaching a gripping device. In particular, the yarn cutting and gripping device described above is often used for multifilaments with relatively large fineness, such as industrial synthetic fibers.
Conventionally known yarn cutting and gripping devices include, for example, Japanese Patent Publication No. 13144/1983 and Japanese Patent Publication No. 17827/1983.
The one described in the No. Publication is known. FIG. 6 is a partial longitudinal cross-sectional schematic diagram showing the usage of the bobbin chuck, that is, the yarn cutting and gripping device described in Japanese Patent Publication No. 56-13144, in which two bobbins 2
1 and 22 are connected via a yarn cutting and gripping device 23. FIG. 7 is a schematic vertical cross-sectional view showing the usage of the bobbin chuck, that is, the yarn cutting and gripping device described in Japanese Patent Publication No. 57-17827.
They are connected via 3. These conventionally known yarn cutting and gripping devices 23 are used by fitting the end portions 24 and 25 into the hollow portions 26 of the bobbins 21 and 22. 27 is a thread cutting grip part; 28
is the bobbin holder.

[Problems to be solved by the present invention] In the above-mentioned prior art, the bobbins 21 and 22 combined via the thread cutting and gripping device 23
The ends 24, 2 of the yarn cutting and gripping device 23 are attached to the inner peripheral surface.
5 protrudes, and the bobbin holder 2 of the winding device
Attachment and removal work to 8 becomes difficult. Also,
The combination of the bobbins 21, 22 and the yarn cutting and gripping device 23 requires work to align the centers so that vibrations do not occur during rotation, that is, work for alignment. Further, when the winding of the yarn onto the bobbins 21, 22 is completed, the bobbins 21, 22, together with the yarn cutting and gripping device 23, are removed from the bobbin holder 28 of the winding device. Removed bobbin 2
1 and 22 and the yarn cutting and gripping device 23 are separated, and the yarn cutting and gripping device 23 is fitted into a bobbin for winding the next yarn. For this fitting, the faster the thread is wound, the more concentricity is required.
If the concentricity is poor, vibration will occur during winding of the yarn, and the wound yarn may lose its shape, resulting in an increase in waste yarn and a decrease in quality. Manufacturing precision of the cutting and gripping device 23 is required. If the manufacturing accuracy is not sufficient and the yarn cutting and gripping device 23 is not fast enough, the yarn cutting and gripping device 23 may be removed from the bobbins 21, 22 when removing and attaching the bobbins 21, 22 and the yarn cutting and gripping device 23 from the bobbin holder 28. Since it comes off and falls, safety and deformation damage to the yarn cutting and gripping device 23 become significant. On the other hand, if there is no margin at all, there is a drawback that it is difficult to fit and detach the bobbins 21, 22 and the yarn cutting and gripping device 23.

The purpose of the present invention is to eliminate the drawbacks of the conventional device described above, to easily and reliably connect the bobbin and the thread cutting/gripping device, and to easily connect the combined bobbin and the thread cutting/gripping device. To provide a yarn cutting and gripping device that can be attached to and removed from a bobbin holder of a winding device.

[Means and actions to solve the problem]

The structure of the present invention is for cutting a yarn provided adjacent to the end in the direction of the rotation axis of a cylindrical bobbin for winding the yarn while maintaining a coaxial relationship, and for gripping the end of the cut yarn. In a cylindrical yarn cutting and gripping device having a yarn cutting and gripping portion, a plurality of steeple-shaped pins are provided on a cylindrical end surface of the yarn cutting and gripping device that is in contact with an end surface of the bobbin and protrude substantially parallel to the rotation axis direction. At the same time, a collar whose inner diameter is slightly larger than the outer diameter of the bobbin is provided on the outer periphery of the cylindrical end face on which the pin is provided, and the end of the bobbin and the collar are fitted, and the end face of the bobbin is fitted with the collar. A yarn cutting and gripping device is characterized in that a steeple-shaped pin is formed so as to pierce and can be attached to and detached from an end of a bobbin.

A specific example of the present invention will be explained in detail using the drawings.

1 to 5 are schematic diagrams of the yarn cutting and gripping device of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a front view, and FIG. 3 is an enlarged vertical cross-section taken along line -' in FIG. 2. 4 and 5 are partial vertical sectional views showing a state in which the yarn cutting and gripping device and the bobbin are combined and inserted into a bobbin holder.

The yarn cutting and gripping device 23 of the present invention has the shape shown in FIGS. 1 to 3, that is, a plurality of pinnacle-shaped pins 3 are provided on the cylindrical end surface 2 that is in contact with the end surface 1 of the bobbin 21 shown in FIGS. 4 and 5. At the same time, a collar 4 having an inner diameter slightly larger than the outer diameter of the bobbin 21 is provided on the outer periphery of the cylindrical end surface 2 on which the pin 3 is provided, and the end 5 of the bobbin 21 and the collar 4 are fitted together. , is formed so as to pierce the end face 1 of the bobbin 21 with a steeple-shaped pin 3. Reference numeral 27 denotes a thread cutting grip part, and the thread cutting grip part 27 consists of a boat-shaped cut. When forming this boat shape, the two cylindrical objects 6 and 7 are combined rather than hollowed out. , one or both ends 8, 9 of the ends 8, 9 on the side where the cylindrical objects 6, 7 are in contact with each other.
The boat-shaped bottom part of the thread cutting grip part 27 is formed by cutting a part of the thread cutting grip part 27 and combining these two cylindrical parts 6 and 7 to form a more acute angle. This makes it possible to cut and hold the yarn reliably.

The yarn cutting and gripping device of the present invention may be used in contact with the end 5 of one bobbin 21 as shown in FIG.
It may be used by being sandwiched between the ends 5 and 10 of 22. As shown in Fig. 5, two bobbins 21 and 2
2, the end of the bobbin 22 (not shown) is provided with a yarn cutting grip 27 as shown in FIG.

The pinnacle-shaped pin 3 may be fixed by passing through the cylindrical objects 6 and 7 as shown in FIG.
However, in order to prevent the yarn cutting and gripping device 23 from being lost when the bobbin 21 is inserted into the end 5 and removed from the end of the bobbin 21, it is necessary to at least penetrate the cylindrical object 6. It is preferable to let it stick.

The yarn cutting and gripping device 23 of the present invention includes a bobbin 21
Before inserting the bobbin into the bobbin holder 28, the bobbin 21 is fitted onto the end 5 of the bobbin 21 in advance. This fitting operation is performed by aligning the end surface 1 of the bobbin 21 and the cylindrical end surface 2 of the yarn cutting and gripping device 23 and inserting the end 5 of the bobbin 21 into the collar 4 of the yarn cutting and gripping device 23. It will be done. Therefore, the yarn cutting and gripping device 23
A pin 3 provided in the bobbin 21 is inserted into the end face 1 of the bobbin 21. In this case, the portion of the end 5 of the bobbin 21 into which the pin 3 is inserted swells, and this swell presses the surface of the end 5 against the collar 4, causing the bobbin 21 and the thread cutting/gripping device 23 to engage. to strengthen it.

The bobbin 21 and thread cutting/gripping device 23 integrated as described above are inserted into the bobbin holder 28, and the bobbin gripping mechanism of the bobbin holder 28, for example, the sliding tubes 11, 12, is moved in the direction of arrow A. It is gripped by pressing the elastic ring 13 and causing it to protrude in the direction of arrow B.

When winding a yarn onto the bobbin 21 inserted in the bobbin holder 28, the bobbin holder 28 is rotated, and when the surface speed of the bobbin 21 becomes constant, the yarn to be wound is guided, and the yarn cutting and gripping device 23 By guiding the yarn upward, a portion of the yarn enters the yarn cutting grip section 27 and is cut, and the end portion of the cut yarn on the side to be wound around the bobbin 21 is gripped.

On the other hand, the bobbin 21 that has finished winding the yarn is moved to the sliding tube 1.
1 and 12 in the direction opposite to the arrow A, the elastic ring 13 is released from the bobbin 21, and the elastic ring 13 is removed from the bobbin holder 28.

In this case, the yarn cutting and gripping device 23 is also removed, and then the bobbin 21 and the yarn cutting and gripping device 23 are separated.

[Effects of the invention] According to the invention, when inserting the thread cutting and gripping device into the end of the bobbin, it is only necessary to insert it along the flange.
It is not necessary, the work can be carried out easily, and the wound yarn does not collapse due to vibration even if it is inserted into the bobbin holder and rotated at high speed. Therefore, the workability in replacing the bobbin and the quality of the bobbin can be significantly improved. In addition, the pinnacle-shaped pin is stuck into the end face of the bobbin, and the surface of the end where the pin is stuck swells and is pressed against the collar, which strengthens the engagement between the bobbin and the yarn cutting and gripping device, and allows it to be attached to the bobbin holder. It will not fall when inserted or removed. On the other hand, since the pin 3 has a steeple-like shape,
The work of separating the bobbin from the yarn cutting and gripping device can be easily done by simply applying a force opposite to that used when inserting the bobbin.

Furthermore, since it is engaged with the bobbin by the pin and collar, there is no need to insert a part of the yarn cutting and gripping device into the bobbin, and therefore there is no protrusion inside the bobbin. Therefore, the bobbin can be smoothly inserted into and removed from the bobbin holder without interfering with alignment.

[Brief explanation of the drawing]

1 to 5 are schematic diagrams of the yarn cutting and gripping device of the present invention, in which FIG. 1 is a perspective view, FIG. 2 is a front view, and FIG. 3 is an enlarged vertical cross-section taken along line -' in FIG. 2. 4 and 5 are partial vertical sectional views showing a state in which the yarn cutting and gripping device and the bobbin are combined and inserted into the bobbin holder. FIGS. 6 and 7 are schematic partial vertical cross-sectional views of a conventional yarn cutting and gripping device. 1... Bobbin end face, 2... Cylindrical end face, 3... Pin, 4... Tsuba, 5, 10... Bobbin end, 6, 7
... Cylindrical object, 8, 9 ... Cylindrical object end, 11, 12
...Sliding tube, 13...Elastic ring, 21, 22...Bobbin, 23... Yarn cutting and gripping device, 24, 25...
... end portion, 26 ... hollow section, 27 ... yarn cutting gripping section, 28 ... bobbin holder.

Claims (1)

[Scope of utility model registration request] A yarn cutting gripping section for cutting the yarn and gripping the end of the cut yarn, which is provided adjacent to and coaxially with the end in the rotational axis direction of the cylindrical bobbin that winds the yarn. In a cylindrical yarn cutting and gripping device, a plurality of steeple-shaped pins are provided on a cylindrical end surface of the yarn cutting and gripping device that is in contact with the end surface of the bobbin, and protrude substantially parallel to the rotation axis direction; A flange whose inner diameter is slightly larger than the outer diameter of the bobbin is provided on the outer periphery of the cylindrical end surface on which the pin is provided, and when the end of the bobbin and the flange are fitted together, the spire-shaped pin is inserted into the end surface of the bobbin. A yarn cutting and gripping device characterized in that the yarn cutting and gripping device is formed so that it can be attached to and detached from the end of the bobbin.