TWI649250B - Reel member and film container body - Google Patents

Abstract

The present invention provides a reel member for winding and pulling out a long-sized film, which improves the gap precision between the flanges by preventing deflection of the outer peripheral portion of the flange due to the weight of the reel member itself. technology.

The reel member 1 of the present invention includes a core shaft portion 2 that is formed in a cylindrical shape and that can be wound around a film, and first and second flange portions 11 that are provided at both end portions of the winding core portion 2, 12. A reinforcing portion 3 having a constant thickness is provided in the vicinity of the winding core portion 2 of the first and second flange portions 11 and 12, and is formed inside the first and second flange portions 11 and 12 with respect to the reinforcing portion 3 The portion located on the outer peripheral side of the flange is provided with a lightweight portion 4 formed to be thinner than the thickness of the reinforcing portion 3, and further provided inside the first and second flange portions 11 and 12. The rib 5 of the film is guided.

Description

Reel member and film container

The present invention relates to a technique for winding and pulling out a reel member of a series of long-size follow-up films such as an anisotropic conductive film.

In general, for example, in the case where an electronic component such as a liquid crystal panel or an IC wafer is electrically connected to each other, an anisotropic conductive adhesive film in which conductive particles are dispersed in an insulating adhesive is used.

In addition, in recent years, a conductive adhesive film containing conductive particles in an insulating adhesive is used as a film for electrically connecting the electrodes for a solar cell to the subsequent adhesive film. The film thus formed is formed on a peeling sheet having a narrow width and a long size, and is taken up in a form wound around a reel member.

In recent years, it has been desired to increase the size of the film, but once the film is grown, the diameter of the film roll increases, and the outer peripheral portion of the flange portion of the reel member is generated by its own weight. Flexing and hindering the problem of smooth pull-out of the film. Further, once the lengthening of the film is not possible, it is necessary to frequently replace the reel member around which the short film of the succeeding film is wound, and it is necessary to stop the production line every time, resulting in a decrease in production efficiency.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-94662

The present invention has been made in view of the problems of the prior art, and an object thereof is to provide a reel member which is wound and pulled out of a long-sized succeeding film by preventing the convexity due to the weight of the reel member. A technique for improving the accuracy of the gap between the flanges by bending the outer peripheral portion.

The reel member of the present invention which achieves the above object includes a winding core portion which is formed in a cylindrical shape and which can be wound around the film, and first and second portions which are provided at both end portions of the winding core portion. a flange portion; a reinforcing portion having a constant thickness is provided in the vicinity of the winding core portion of the first and second flange portions, and is reinforced with respect to the inner portion of the first and second flange portions The portion located on the outer peripheral side of the flange is provided with a lightweight portion formed to be thinner than the thickness of the reinforcing portion, and further provided at the inner portion of the first and second flange portions for guiding The rib of the film is then attached. In the present invention, the lightweight portion is formed in a tapered shape such that the thickness thereof is thinned from the reinforcing portion toward the outer peripheral portion of the flange. In the present invention, it is also effective in that the surface of the rib which guides the film is provided so as to be located on a plane orthogonal to the rotation direction of the reel member. Further, the present invention is a film storage body comprising the above-described reel member and a film which is wound around a winding core portion of the reel member. In the present invention, it is also effective in the case where the above-mentioned adhesive film is an anisotropic conductive adhesive film in which conductive particles are dispersed in an insulating adhesive.

In the case of the present invention, a reinforcing portion having a constant thickness is provided in the vicinity of the winding core portion of the first and second flange portions, and is located at an inner portion of the first and second flange portions and is convex with respect to the reinforcing portion. The portion on the outer peripheral side is provided in such a manner that the thickness is thinner than the thickness of the reinforcing portion For example, since the weight portion is tapered, the rigidity of the reel member can be ensured by the reinforcing portion having a constant thickness, and the weight of the outer peripheral portion of the first and second flange portions can be reduced, thereby preventing Since the outer peripheral portion of the flange is deflected by the weight of the reel member, the accuracy of the gap between the first and second flange portions can be improved. Further, in the present invention, since the ribs for guiding the film are provided on the inner portions of the first and second flange portions, it is possible to prevent the film from being smashed during winding and pulling out. It is possible to prevent the film from coming off during winding and the like, and the hooking or blocking of the film after the drawing. In the present invention, in the case where the rib portion is guided to the surface of the film so as to be disposed on a surface orthogonal to the rotation direction of the reel member, the winding can be more reliably prevented from being carried out at the time of winding and pulling out. Since the film is entangled, it is possible to more reliably prevent the film from coming off during winding, and the like, and the hooking or clogging of the film after the drawing.

According to the present invention, in the reel member in which the long film of the succeeding film is wound and pulled out, since the deflection of the outer peripheral portion of the flange due to the weight of the reel member can be prevented, the first and second flanges can be improved. The accuracy of the gap between the parts. As a result, according to the present invention, in the attaching step of the film, the reel member can be replaced frequently, and the production efficiency can be greatly improved.

1‧‧‧Reel components

2‧‧‧Rolling shaft part

3‧‧‧Reinforcement Department

4‧‧‧Lighting Department

5‧‧‧ ribs

5a‧‧‧Inside guide

5b‧‧‧Outer guide

6‧‧‧Next film

10‧‧‧ drive shaft

11‧‧‧1st flange

12‧‧‧2nd flange

O‧‧‧Rotation axis

Fig. 1(a) is a plan view showing a configuration of an inner side of an embodiment of a reel member of the present invention; (b) is a sectional view taken along line AA of Fig. 1(a); (c): Fig. 1(a) BB line profile.

Fig. 2 is a cross-sectional view showing the overall configuration of the reel member.

Fig. 3 is a cross-sectional view showing the overall configuration of an embodiment of a film storage body of the present invention.

Fig. 4 is an explanatory view showing the dimensional relationship of each portion of the reel member of the present invention.

Fig. 5 is a cross-sectional view showing the configuration of the reel members of Comparative Examples 1 and 2.

Fig. 6 is a cross-sectional view showing the configuration of a reel member of Comparative Example 3.

Fig. 7 is a cross-sectional view showing the configuration of a reel member of Comparative Example 4.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1(a) is a plan view showing the inside structure of the embodiment of the reel member of the present invention, Fig. 1(b) is a cross-sectional view taken along line AA of Fig. 1(a), and Fig. 1(c) is a view of Fig. 1(a) ) BB line profile.

The reel member 1 of the present embodiment is made of a polystyrene resin from the viewpoint of ensuring dimensional stability, and is attached to the film winding device as shown in Figs. 1(a) to 1(c). Or the drive shaft 10 of the film pull-out device.

The reel member 1 has a cylindrical core portion 2 having a cylindrical shape in which a long-sized adhesive film such as an anisotropic conductive film or the like is wound, and is integrally provided at both end portions of the winding core portion 2 The first and second flange portions 11 and 12 of the disk shape.

In the case of the present embodiment, the first and second flange portions 11 and 12 are formed such that their outer side surfaces are planes orthogonal to the rotation axis O, and have the same configuration. Hereinafter, in the present specification, the first flange portion 11 will be described as an example.

A circular reinforcing portion 3 is provided around the winding core portion 2 of the first flange portion 11, for example. The reinforcing portion 3 has an inner side surface formed in parallel with the outer surface of the first flange portion 11, and is formed to have a constant width.

The inner portion of the first flange portion 11 and the outer peripheral portion with respect to the reinforcing portion 3 The weight portion 4 is provided in the side portion. The light weight portion 4 is formed in a tapered shape so as to be thinner than the reinforcing portion 3 from the reinforcing portion 3 toward the outer peripheral portion side. Further, in the present embodiment, the surface (inner side surface) of the lightweight unit 4 is formed in a planar shape.

Further, a rib 5 for guiding the film is provided on a portion of the inner side of the first flange portion 11 and on the outer peripheral portion side with respect to the winding core portion 2. The rib 5 has a plurality of inner guide portions 5a that linearly extend around the rotation axis O of the reel member 1, and a circular outer side that is provided on the outer edge portion of the first flange portion 11. Guide portion 5b.

Each of the ribs 5 is formed such that the upper side of the inner guiding portion 5a and the outer guiding portion 5b of the rib 5 is located on the outer side of the first flange portion 11 so as to be slightly higher than the reinforcing portion 3. The plane parallel to 11a, that is, the plane orthogonal to the axis of rotation O. Further, a predetermined arc processing is applied to each of the top surfaces of the ribs 5.

Fig. 2 is a cross-sectional view showing the overall configuration of a reel member of the embodiment. 3 is a cross-sectional view showing the overall configuration of an embodiment of the film storage body of the present invention. The reel member 1 shown in FIG. 2 is attached to a film winding device (not shown), and the long-sized film 6 is wound around the winding core portion 2, whereby the film housing shown in FIG. 3 can be obtained. Body 20.

Fig. 4 is an explanatory view showing the dimensional relationship of each portion of the reel member 1 of the present invention. The reel member 1 of the present invention has first and second flange portions 11 and 12 having a large diameter so as to have an effect on the long film (300 to 600 m) of the adhesive film 6.

Specifically, the diameters of the first and second flange portions 11 and 12 are 250 to 300 mm, and the interval between the first and second flange portions 11 and 12, that is, the thickness t of the core shaft portion 2 is 1.00. Those who are ~1.30 mm are particularly effective.

In this case, it is necessary to ensure the necessary rigidity and to achieve a lightweight view of the outer peripheral portion of the flange. Preferably, the diameter d of the winding core portion 2 is set to be (the diameter of the first and second flange portions 11 and 12/2.5) ± 10%. In this case, from the viewpoint of reducing the weight of the outer peripheral portion of the flange, it is preferably set to about 100 mm.

Further, from the viewpoint of securing the necessary rigidity and reducing the weight of the outer peripheral portion of the flange, it is preferable to set the diameter D of the reinforcing portion 3 to be (the diameter of the first and second flange portions 11 and 12/1.5). ±10%. Specifically, the diameter D of the reinforcing portion 3 is preferably 183 to 150 mm. However, from the viewpoint of reducing the weight, it is preferably set to about 150 mm.

In addition, the ratio H ₁ :H ₂ of the thickness of the center-side end portion and the outer peripheral portion-side end portion of the lightweight portion 4 is preferably 5:4 from the viewpoint of securing the necessary rigidity and reducing the weight of the outer peripheral portion of the flange. ~3:2, more preferably 4:3. Specifically, it is preferable that the size H ₁ of the light-weighting portion 4 on the center side is 1.90 to 2.10 mm, and the size H ₂ of the light-weighting portion 4 on the outer peripheral side is preferably 1.45 to 1.55 mm.

Further, from the viewpoint of securing the necessary rigidity and reducing the weight of the outer peripheral portion of the flange, the height h of the outer peripheral portion (outer guide portion 5b) of the rib 5 is preferably 0.4 to 0.5 mm. Further, from the viewpoint of preventing adhesion of the film to the rib surface and preventing the film from coming off the gap, it is preferable that the interval (gap) C between the ribs 5 is relative to the width of the film 6 Set by the interval of 0.05~0.10 mm.

On the other hand, the number of the inner guide portions 5a of the ribs 5 is preferably increased as the diameter of the reel becomes larger. Within the scope of the present invention, it is preferably from 8 to 24, more preferably from 12 to 24.

When the number of the inner guiding portions 5a of the ribs 5 is less than eight, it is feared that the film 6 is placed in a transverse manner after being wound around the film 6, or when the film 6 is transported, the film 6 is offset; When the number of the inner guide portions 5a of the rib 5 is more than 24, it is feared that it is generated at the time of winding. The film 6 is then placed over it and, at the same time, increases the risk of adhesion of the film 6 to the rib surface. In addition to the larger diameter of the reel member 1, a configuration in which a large number of ribs 5 (inner guide portions 5a) are provided in the outer peripheral portions of the first and second flange portions 11 and 12 may be employed.

In the present embodiment described above, the reinforcing portion 3 having a constant thickness is provided in the vicinity of the winding core portion 2 of the first and second flange portions 11 and 12, and the first and second flange portions 11 are provided. The inner portion of the portion 12 and the portion of the reinforcing portion 3 located on the outer peripheral side of the flange are provided with the lightweight portion 4 which is formed to have a tapered thickness so that the thickness of the reinforcing portion 3 is thin. Therefore, the thickness is limited by a certain thickness. The reinforcing portion 3 can ensure the rigidity of the reel member 1, and can reduce the weight of the outer peripheral portions of the first and second flange portions 11, 12, and thereby prevent the convexity of the reel member 1 from being caused by the weight of the reel member 1 Since the deflection of the outer peripheral portion is increased, the accuracy of the gap between the first and second flange portions 11 and 12 can be improved.

Further, in the present embodiment, the ribs 5 for guiding the adhesive film 6 are provided on the inner portions of the first and second flange portions 11, 12, and the ribs 5 are guided to the surface of the film 6, Since it is provided so as to be located on the surface orthogonal to the rotation direction of the reel member 1, it is possible to reliably prevent the film 6 from being smashed during winding and pulling out, thereby reliably preventing winding. Then, the film 6 is detached and the like, and the film 6 is hooked or blocked during the drawing.

Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited to the following examples. <Preparation of Film> The film 6 was formed by applying a film of an anisotropic conductive adhesive having a thickness of 25 μm after drying to a release sheet (not shown) having a width of 1.0 mm. Further, the type of the adhesive is an epoxy-based thermosetting adhesive.

Here, the lowest dissolved viscosity of the anisotropic conductive film is 3.0×10 ⁴ Pa. s. The minimum dissolved viscosity was measured by using a rotary rheometer (manufactured by TA Instruments Co., Ltd.) at a temperature elevation rate of 10 ° C /min and a measurement pressure of 5 g, and was measured using a measuring disc having a diameter of 8 mm. value.

<Example 1> The reel member 1 is made of a polystyrene resin, and the core shaft portion 2 has a diameter of 100 mm and a thickness of 1.25 mm, and the diameters of the first and second flange portions 11 and 12 are Two-sided flange type of 250 mm. This is the constructor shown in Figure 2.

The thickness of the reinforcing portion 3 of the reel member 1 was set to 2.0 mm, and the width D was set to 150 mm. Further, the lightweight portion 4 is formed in a flat tapered shape, and the height H _{1 of the} inner peripheral portion of the flange is set to be 2.0 mm which is the same as the thickness of the reinforcing portion 3, and the thickness H _{2 of the} outer peripheral portion of the flange is set to 1.5 mm.

On the other hand, the height h of the flange outer peripheral portion (outer guide portion 5b) of the rib 5 is set to be 0.5 mm from the inner side surfaces of the first and second flange portions 11 and 12. Further, 12 inner guide portions 5a of the rib 5 are provided at equal intervals. In the reel member 1, an anisotropic conductive adhesive film 6 having a length of 500 m as the bonding film 6 is wound.

<Comparative Example 1> As shown in Fig. 5, the thickness of the first and second flange portions 11 and 12 is set to 2 mm so that the tapered portion is not formed, and the rib portion 5A is used. The heights of the inner guide portion 50a and the outer guide portion 50b are set to be 0.1 mm from the flange inner side surface 40. The reel member 1A is a member of a conventional reel member. Further, the diameters of the first and second flange portions 11 and 12 were set to 195 mm, and the film 6 having a length of 300 m was wound.

<Comparative Example 2> A reel member 1A having a diameter of 250 mm of the first and second flange portions 11 and 12 was produced in the shape shown in Fig. 5, and a film 6 having a length of 500 m was wound.

<Comparative Example 3> As shown in Fig. 6, the first and second flange portions 11 and 12 are The inner side surface is formed with a tapered light-weight portion 4A. On the other hand, the heights of the inner guide portion 50a and the outer guide portion 50b of the rib 5B are set to be 0.1 mm from the inner side surface of the flange. The reel member 1B was produced under the same conditions as the other examples, and a film 6 having a length of 300 m was wound.

<Comparative Example 4> As shown in Fig. 7, the reel member 1C was produced under the same conditions as in the example except that the tapered portion was formed without the reinforcing portion, and the length of 500 m was wound. Film 6.

<Evaluation> The reel members (film storage bodies) which were produced according to the examples and Comparative Examples 1 to 4 were each placed in an environment at room temperature for 24 hours, and were subjected to a laser reflection type displacement gauge to the outer peripheral portion of the flange. The gap between the first and second flange portions 11 and 12 was measured. The results are shown in Table 1. Further, in the examples and the comparative examples 1 to 4, the state (falling off, etc.) of the adhesive film 6 at the time of winding was visually observed. The results are shown in Table 1.

Further, for the adhesive film 6, the pull-out was repeated for 1 second at intervals of 1 second with a pull-out tension of 50 g and a tensile speed of 500 mm/sec until the end, and visual observation was performed. The state of the film 6 after the pull-out and the pull-out (hook, block, break when pulled out). The results are shown in Table 1.

<Evaluation Result> As is clear from Table 1, in the case of Comparative Examples 1 and 2 in which the reinforcing portion and the tapered light-weight portion were not provided, the length of the film 6 was shorter than 300 m (Comparative Example 1). The deviation of the gap at the outer peripheral portion of the flange was small (1.15 ± 0.1 mm), and no problem occurred during winding and pulling, but the length of the film 6 was 500 m long (Comparative Example 2) The deviation of the gap at the outer peripheral portion of the flange becomes large (1.15 ± 0.4 mm), and hooking, blocking, and breaking occur when pulled out.

Further, on the other hand, the tapered side weight portion 4A is formed on the inner side surfaces of the first and second flange portions 11 and 12, and the height of the rib portion 5B is set to be 0.1 higher than the inner side surface of the reel member 1B. In Comparative Example 3 of mm, even when the diameters of the first and second flange portions 11 and 12 are 250 mm, the deviation of the gap at the outer peripheral portion of the flange is large (1.15 ± 0.2 mm), and the volume is large. The winding deviation and peeling of the film 6 are caused by the winding.

Further, a tapered light-weight portion 4A is formed on the inner side surfaces of the first and second flange portions 11 and 12, and the height of the rib portion 5 at the outer peripheral portion of the flange is set in the same manner as in the embodiment. In Comparative Example 4 of 0.5 mm, the length of the adhesive film 6 was lengthened to 500 m, but the deviation of the gap at the outer peripheral portion of the flange was large (1.15 ± 0.2 mm), and the hook was caught at the time of pulling out.

On the other hand, the reinforcing portion 3 and the tapered light-weight portion 4 are formed on the inner side surfaces of the first and second flange portions 11 and 12, and the height of the rib portion 5 of the outer peripheral portion of the flange is set to 0.5 mm. In the embodiment, even when the length of the film 6 is lengthened to 500 m, the deviation of the gap of the outer peripheral portion of the flange is small (1.15 ± 0.1 mm), especially 1.15 ± 0.1 mm or less at the moment after molding. Further, in the examples, no problem occurred at the time of winding and pulling out.

From the above results, it was confirmed that the deflection of the outer peripheral portion of the flange due to the weight of the reel member can be prevented, and the accuracy of the gap between the first and second flange portions can be improved.

Claims (4)

A reel member comprising: a winding core portion formed in a cylindrical shape and capable of winding a film; and first and second flange portions provided on the winding core portion The end portion is formed such that each of the outer side surfaces is a parallel plane; and the first and second flange portions are further from the inner peripheral side of the winding core portion to the outer peripheral surface of the winding core portion A reinforcing portion having a constant thickness is provided in a portion around the outer side, and a portion of the inner side portion of the first and second flange portions is located on the outer peripheral side of the flange with respect to the reinforcing portion. The reinforcing portion is formed into a tapered lightweight portion so that the thickness of the reinforcing portion is thinner than the thickness of the reinforcing portion, and further, the reinforcing portion and the reinforcing portion are formed inside the first and second flange portions The surface of the lightweight portion is provided with a rib for guiding the adhesive film; the rib portion is provided to guide the surface of the adhesive film so as to be located on a plane orthogonal to the rotation axis of the reel member. The reel member of claim 1 is wound around a film of 300 to 600 m; the diameter of the first and second flange portions is 250 to 300 mm, and the interval between the first and second flange portions is That is, the thickness of the winding core portion is 1.00 to 1.30 mm, the diameter of the winding core portion is (the diameter of the first and second flange portions / 2.5) ± 10%, and the diameter of the reinforcing portion is (the above) 1 and the diameter of the second flange portion / 1.5) ± 10%, and the thickness ratio of the center side end portion to the outer peripheral portion side end portion of the lightweight portion is 5:4 to 3:2. A film storage body comprising: a reel member according to claim 1 or 2; and a film which is wound around a winding core portion of the reel member. The film container according to claim 3, wherein the adhesive film is an anisotropic conductive film in which conductive particles are dispersed in an insulating adhesive.