JPS6331382Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a winding device for a fiber bundle formed by bundling several hundred to several thousand fibers each having a diameter of several to several μm, for example, carbon fibers plated with copper.

For example, when attaching a power module component (hereinafter simply referred to as a component) that generates a large amount of heat to an alumina-based ceramic substrate (hereinafter simply referred to as a substrate), if the component is directly bonded to the substrate, the difference in thermal expansion coefficient between the substrate and the component will occur. Because of the large amount of friction, the joints may peel off or parts may be damaged. For this reason, conventionally, a copper plate and a molybdenum or tungsten metal plate have been inserted between the board and the component to reduce the differences in thermal expansion coefficient between the board and the copper plate, between the copper plate and the metal plate, and between the metal plate and the component. At the same time, by dissipating heat with copper plates and metal plates and reducing the amount of heat reaching the substrate, peeling of joints and damage to parts are prevented.

However, in such a configuration, molybdenum and tungsten are rare substances, so they are not only expensive but also difficult to obtain. Furthermore, since the number of parts increases, the number of assembly steps increases, which reduces workability.

As an alternative to such cushioning materials using copper plates or metal plates, fiber bundles made of several hundred to several thousand fibers with diameters of several to several tens of micrometers made of copper-plated carbon fibers can be used in the form of coils. A cushioning material has been proposed in which the material is wound around the material, heated and pressurized to integrate it, and then subjected to finishing processing. The coefficient of thermal expansion of this buffer material can be arbitrarily changed by changing the thickness of the copper plating covering the carbon fibers (that is, by changing the ratio of carbon to copper). It also has good heat dissipation. Furthermore, it can be formed from inexpensive materials and is easily available. Further, since only one piece needs to be inserted between the board and the component, it has many advantages such as improving the workability of assembly work.

In the winding step in the manufacturing process of such cushioning materials, a winding device that has been commonly used in the past is used. For example, as shown in FIG. 1, a flange 3 is supported on a drive shaft 2 coupled to a rotational drive source 1. As shown in FIG. A driven shaft 5 is rotatably and slidably supported on a bearing 4 facing the rotational drive source 1 so as to face the drive shaft 2 . A flange 7 in which a slit 6 is formed is supported at one end of the driven shaft 5 so as to face the flange 3.

With this configuration, after the driven shaft 5 is projected until the flange 6 comes into contact with the drive shaft 2, the fiber bundle 8
Insert the starting end 9 of the flange into the slit 7 of the flange 6.
Next, the rotational drive source 1 is activated, and the fiber bundle is wound in the space between the flanges 3 and 6 to form a coil. When the required amount of winding is completed, adhesive tape 11 is wrapped around the outer periphery of the wound coil 10 to fix the end, and then the fiber bundle 8 is cut.
Next, while removing the starting end 9 from the slit 7, the flange 6 is moved back, and then the coil 10 is removed from the drive shaft 2. At this time, the starting end 9 of the fiber bundle protrudes from the hole at the center of the coil 10.

In such a state, if you accidentally pull the starting end 9 when handling the coil 10, the coil 10
The fiber bundles are drawn out from within, reducing the radial thickness of the coil 10 so that it no longer meets the desired specifications.
Furthermore, when inserting into the heating and pressing jig, the starting end 9 becomes tight and cannot be inserted. Or starting point 9
Since the overlapping portion of the end face of the coil 10 is thicker than other portions, the overall amount of pressurization is insufficient, leading to problems such as deterioration of performance such as heat conduction. Therefore, when the coil 10 is taken out from the winding device, the starting end 9 is immediately cut off, resulting in low work efficiency. Further, since the slit 6 is formed in the flange 7, there is a drawback that the fiber bundle gets caught in the opening of the slit, and the shape of the wound coil becomes disordered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a winding device that eliminates the above-mentioned drawbacks of the prior art and allows winding of a fiber bundle without causing the starting end of the fiber bundle to protrude from the end surface of the coil.

In order to achieve the above purpose, in this invention,
A slide shaft is slidably arranged at the center of the drive shaft, a winding core that passes through the flange is connected to one end of the slide shaft, and the core is slidably fitted to the center of the driven shaft. and providing a pin whose one end slidably passes through the flange and is biased so as to protrude from the flange toward the winding core, and by abutting the winding core against the pin, the fiber bundle is held between the pins, and By pushing the pin toward the driven shaft side with the winding core, the fiber bundle is cut by the hole in the flange on the driven shaft side and the winding core.

An embodiment of the present invention will be described below with reference to the drawings.

3 to 5 show an embodiment of the present invention, in which the rotary drive source 21 includes:
A hollow drive shaft 23 having an elongated hole 22 formed on its outer periphery is coupled to the drive shaft 23, and a flange 24 is fixed to the tip thereof. The elongated hole 2 is formed in the axial center of the drive shaft 23.
A slide shaft 26 having an upright pin 25 that slidably passes through the slide shaft 26 is slidably supported. A winding core 27 that slidably passes through the flange 24 is fixed to the end face of the slide shaft 26, and a notch 28 is formed at the tip of the winding core 27. A hollow driven shaft 31 is rotatably and slidably supported by a bearing 29 facing the rotary drive source 21 via a bearing 30 . This driven shaft 31
A flange 32 is supported at the tip of the flange 32 so as to face the flange 24 . The driven shaft 31
A pin 34 with a flange 33 formed in the center is located at the axial center of the pin 34.
is slidably inserted through the flange 32 and is biased by a spring 35 so as to protrude toward the winding core 27 . The winding core 27 and the pin 34 are formed to have the same thickness.

In the above configuration, at the start of winding, the driven shaft 3
1 to the drive shaft 23 side and bring the flanges 24 and 32 close to each other so that the distance between them becomes the required winding width. Next, as shown in FIG. 4, the fiber bundle 8
is positioned so that it passes through the opposing gap between the winding core 27 and the pin 34. Then, by operating the pin 25, the winding core 27 is moved to the pin 34 side, and the pin 34 and the winding core 2
A fiber bundle 8 is held between the fiber bundles 7 and 7. Then, the core 27 is further moved toward the pin 34, and one end of the core 27 is fitted into the hole of the flange 32, as shown in FIG. Then, the starting end 9 of the fiber bundle 8 is cut between the peripheral edge of the hole in the flange 32 and the leading edge of the winding core 27, and falls under its own weight. On the other hand, the fiber bundle 8 in contact with the notch 28 is bent as shown and is held between the winding core 27 and the pin 34 at the middle of the flange 32. In this state, the drive shaft 23 is rotated, the fiber bundle 8 is wound around the winding core 27 a required number of times, a coil is formed, the outer periphery is fixed with tape, and the fiber bundle 8 is cut.
After forming the coil, the winding core 27 is
When the pin 34 is moved toward the drive shaft 23, the pin 34 protrudes from the flange 32 due to the counter pressure of the spring 35.
The fiber bundle 8 held between the winding core 27 is pushed into the coil. Then, the driven shaft 31 is moved backward,
The coil is taken out from between the flanges 24 and 32.

In this way, a coil without protruding starting ends can be formed.

As described above, according to the present invention, since the winding core and the pin are slidably provided on the drive shaft and the driven shaft, the fiber bundle can be processed during winding. There is no need to cut the starting end, and work efficiency can be improved. Furthermore, since no groove is formed in the flange, the fiber bundle is not caught in the winding, and defects can be reduced. Furthermore, there are other effects such as automation of winding.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional winding device, FIG. 2 is a perspective view of a coil of a fiber bundle, FIG. 3 is a perspective view of a winding device according to the present invention, and FIGS. 4 and 5 are windings. It is a process diagram showing the steps up to the start. 21...Rotary drive source, 22...Elongated hole, 23...
Drive shaft, 24...Flange, 25...Pin, 26
... Slide shaft, 27 ... Winding core, 28 ... Notch, 29 ... Bearing, 31 ... Driven shaft, 32 ... Flange, 33 ... Flange, 34 ... Pin, 35 ... Spring.

Claims (1)

[Scope of utility model registration request] A rotary drive source, a drive shaft coupled to the rotary drive source, a flange fixed to the drive shaft, a driven shaft disposed to face the drive shaft and capable of sliding in the axial direction; In a winding device that has a flange fixed to one end of a driven shaft so as to face the flange, a slide shaft that is slidably fitted and supported on the axial center of the drive shaft, and a flange on the drive shaft side are provided. A winding core that slidably passes through the flange, is connected to the slide shaft, and has a notch formed at its tip to accommodate a fiber bundle to be wound, and a core of the driven shaft,
A fiber bundle comprising: a movable pin that passes through a flange on the driven shaft side, is slidably supported so as to face the winding core, and is biased such that its tip protrudes from the flange. winding device.