Reinforcement structure for core

Abstract

To protect a part of a resin-made core to which torque is transmitted from breakage.SOLUTION: A reinforcement member 11 which has higher strength against shearing force in a rotation direction than a core 1 made of resin such as FRP to taking up a film or sheet is fitted to an end of the core 1. The reinforcement member 11 is, for example, a metallic annular body, and fitted to the end of the core 1 such that an end face of the core 1 and an end face of the reinforcement member 11 are aligned with each other. Such a reinforcement structure allows the reinforcement member 11 to receive torque transmitted from a rotary drive device to the core 1, thereby preventing a phenomenon in which the end of the core 1 is broken to get turned up.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a structure for reinforcing a portion of a winding core for winding a film or sheet, where a rotational torque acts. [Background technology]

[0002] Figure 5 As shown in FIG. 1, a cylindrical winding core 1 around which various films or sheets are wound is known that is made of FRP (fiber reinforced plastic) and has an engagement recess 2, which is a U-shaped notch, formed at both ends or one end (see Patent Document 1 below).

[0003] On the inner peripheral side of the end of the core 1, Figure 6 As shown in (a), the mounting portion 21 of the shaft 20 of the rotary drive device is fitted, and the engagement protrusion 22 provided on the outer periphery of the mounting portion 21 engages with the engagement recess 2, so that the torque of the rotary drive device is transmitted to the winding core 1.

[0004] In such a winding core 1, when a rotational torque is applied from the shaft 20 for a long period of time, Figure 6 As shown in (b), a circumferential crack may occur from the engagement recess 2, causing a frayed wound portion 5 to protrude from the outer circumferential surface of the winding core 1. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2005-280926 A Summary of the Invention [Problem to be solved by the invention]

[0006] If the above-mentioned damage occurs, the expected torque may not be transmitted from the rotary drive device to the core, and the wound portion due to the split may damage the film or sheet.

[0007] Therefore, an object of the present invention is to provide a reinforcing structure capable of protecting the portion of the resin winding core to which torque is transmitted from being damaged. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a reinforcing structure for a winding core for winding a film or sheet, comprising a thin-walled portion provided on the outer peripheral surface of the end portion of a resin winding core, the thin-walled portion having a higher strength against shearing force in the rotational direction than the winding core. However, there is no engagement recess on the rotary drive device side. Fit the reinforcing member, The end surface of the winding core and the end surface of the reinforcing member are aligned with each other, The torque of the rotary drive device is received by the reinforcing member, so that the reinforcing member and the winding core rotate together (Configuration 1).

[0009] In addition, in the reinforcing structure of the winding core of configuration 1, The core is made of FRP, and the reinforcing member made of metal is fitted and bonded to the thin wall portion provided on the outer circumferential surface. This was done (Configuration 2).

[0010] In addition, in a reinforcing structure of a winding core for winding a film or sheet, a reinforcing member having a higher strength against a shear force in the rotational direction than the winding core is attached to an end face of a resin winding core by an adhesive, The outer peripheral surface and the inner peripheral surface of the winding core are aligned with the outer peripheral surface and the inner peripheral surface of the reinforcing member, The torque of the rotary drive device may be received by the reinforcing member, so that the reinforcing member and the winding core rotate together (Configuration 3). .

[0011] In addition, in a reinforcing structure for a winding core for winding a film or sheet, a fitting recess is provided at an end of a resin winding core, and a reinforcing member having a higher strength against a shear force in the rotational direction than the winding core is fitted into the fitting recess, The torque of the rotary drive device may be received by the reinforcing member, so that the reinforcing member and the winding core rotate together (Configuration 4). . Effect of the Invention

[0012] In the core reinforcing structure according to the present invention, the torque transmitted from the rotary drive device to the core is received by the reinforcing member attached to the end of the core, preventing the end of the core from cracking and curling up. This not only ensures that the torque is transmitted from the rotary drive device to the core, but also prevents damage to the film or sheet. [Brief description of the drawings]

[0013] [Figure 1]In a reference embodiment of the reinforcing structure for a winding core of the present invention, (a) is a perspective view of both ends of the winding core showing a fitted state of the end of the winding core and the reinforcing member, (b) is a perspective view showing a separated state, and (c) is an axial cross-sectional view showing the fitted state. [Diagram 2] FIG. 1 is a perspective view showing a winding core end portion having no engagement recess in a first embodiment of a winding core reinforcing structure of the present invention; [Diagram 3] FIG. 13 is a perspective view showing a state where the end portion of the winding core and the reinforcing member are separated from each other in a second embodiment of the winding core reinforcing structure of the present invention; FIG. [Figure 4] FIG. 13 is a perspective view showing a winding core end portion of a third embodiment of the winding core reinforcement structure of the present invention; [Diagram 5] FIG. 1 is a perspective view showing an unreinforced winding core having an engagement recess; [Figure 6] FIG. 1A is a perspective view showing an engagement portion between the winding core and the shaft of a rotation drive device; FIG. 1B is a perspective view showing a state in which a winding portion due to a slit protrudes from an engagement recess of the winding core; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] < reference Form> This invention reference The embodiment will be described with reference to FIG.

[0015] The core 1 is cylindrical and has various films or sheets wound around its outer periphery, and is made of FRP with engagement recesses 2, which are U-shaped notches, formed at both ends.

[0016] The reinforcing members 11 attached to both ends of the winding core 1 are annular bodies made of a metal such as stainless steel, and an engagement recess 12 corresponding to the engagement recess 2 of the winding core 1 is formed at one end.

[0017] A thin portion 3 is provided by cutting on the outer peripheral surface of the end portion of the core 1, and a reinforcing member 11 is fitted onto the outer peripheral side of the thin portion 3 and bonded thereto.

[0018] In this fitted state of the winding core 1 and the reinforcing member 11, the outer peripheral surface of the portion of the winding core 1 other than the thin portion 3 is aligned with the outer peripheral surface of the reinforcing member 11. In addition, the end face of the winding core 1 is aligned with the end face of the reinforcing member 11.

[0019] The engagement recess 2 of the winding core 1 and the engagement recess 12 of the reinforcing member 11 are located at the overlapping portion of the winding core 1 and the reinforcing member 11, and are aligned and communicate with each other in the radial direction.

[0020] In this reinforcing structure, the torque transmitted from the rotary drive device to the core 1 is received by the reinforcing member 11 attached to the end of the core 1, preventing the end of the core 1 from cracking and curling up from the engagement recess 2. This not only ensures that the torque is transmitted from the rotary drive device to the core 1, but also prevents damage to the film or sheet.

[0021] In addition, since the outer peripheral surfaces of the core 1 and the reinforcing member 11 are flush with each other, even if the film or sheet shifts in the axial direction of the core 1 when it is wound around the core 1, it will not get caught on the reinforcing member 11.

[0022] Furthermore, since the inner diameter of the end side of the winding core 1 does not change, there is no need to change the mounting portion of the shaft of the existing rotation drive device.

[0023] < First embodiment > Next, a first embodiment of the present invention will be described with reference to FIG.

[0024] The winding core 1 and the reinforcing member 11 do not have the engagement recesses 2, 12 on their end faces that engage with the rotary drive device as shown in the above-mentioned embodiment, and the reinforcing member 11 The core 1 is reinforced only by fitting and adhering it to the outer periphery of the end of the core 1. There are .

[0025] The core 1 is a cylindrical FRP core around which various films or sheets are wound.

[0026] The reinforcing members 11 attached to both ends of the winding core 1 are annular bodies made of a metal such as stainless steel. A thin-walled portion 3 is formed by cutting on the outer peripheral surface of the end of the winding core 1, and the reinforcing members 11 are fitted onto the outer peripheral side of the thin-walled portion 3 and adhered thereto.

[0027] In this fitted state of the winding core 1 and the reinforcing member 11, the outer peripheral surface of the portion of the winding core 1 other than the thin portion 3 is aligned with the outer peripheral surface of the reinforcing member 11. In addition, the end face of the winding core 1 is aligned with the end face of the reinforcing member 11.

[0028] In this reinforcing structure, the torque transmitted from the rotary drive device to the core 1 is received by the reinforcing member 11 attached to the end of the core 1, preventing the end of the core 1 from cracking and curling up. This not only ensures that the torque is transmitted from the rotary drive device to the core 1, but also prevents the film or sheet from being damaged.

[0029] In addition, since the outer peripheral surfaces of the core 1 and the reinforcing member 11 are flush with each other, even if the film or sheet shifts in the axial direction of the core 1 when it is wound around the core 1, it will not get caught on the reinforcing member 11.

[0030] Furthermore, since the inner diameter of the end side of the winding core 1 does not change, there is no need to change the mounting portion of the shaft of the existing rotation drive device.

[0031] < 2nd Implementation Form> Also, Second embodiment of the present invention Form Figure 3 The explanation will be based on the above.

[0032] The core 1 is a cylindrical FRP core around which various films or sheets are wound. reference The engaging recess 2 as shown in the embodiment is not provided.

[0033] The reinforcing members 11 attached to both ends of the core 1 are annular bodies made of a metal such as stainless steel, and an engagement recess 12 that is a U-shaped notch is formed at one end.

[0034] At the end of the core 1, on both the outer and inner peripheral surfaces, The above reference form and 1 The thin portion 3 as shown in the embodiment is not provided, and the reinforcing member 11 is bonded to the end face of the winding core 1.

[0035] In this joined state of the winding core 1 and the reinforcing member 11, the outer peripheral surface and the inner peripheral surface of the winding core 1 and the outer peripheral surface and the inner peripheral surface of the reinforcing member 11 are aligned.

[0036] In this reinforcing structure, the torque transmitted from the rotary drive device to the core 1 is received by the reinforcing member 11 attached to the end of the core 1, preventing the end of the core 1 from cracking and curling up. This not only ensures that the torque is transmitted from the rotary drive device to the core 1, but also prevents the film or sheet from being damaged.

[0037] In addition, since the outer peripheral surfaces of the core 1 and the reinforcing member 11 are flush with each other, even if the film or sheet shifts in the axial direction of the core 1 when it is wound around the core 1, it will not get caught on the reinforcing member 11.

[0038] Furthermore, when manufacturing the winding core 1, there is no need to cut out the winding core 1 to form the engagement recess 2, and there is no need to cut off the end of the winding core 1 to form the thin-walled portion 3, improving work efficiency.

[0039] Furthermore, since the inner diameter of the end side of the winding core 1 does not change, there is no need to change the mounting portion of the shaft of the existing rotation drive device.

[0040] < Third Implementation Form> In addition, the third embodiment of the present invention Form Figure 4 The explanation will be based on the above.

[0041] The core 1 is a cylindrical FRP core around which various films or sheets are wound. reference The engaging recess 2 as shown in the embodiment is not provided, and instead, a fitting recess 4 cut out in a U-shape is formed.

[0042] The reinforcing member 11 that is fitted into the fitting recess 4 of the core 1 is a small plate-like piece made of metal such as stainless steel, and has an engagement recess 12 that is a U-shaped notch formed on one side.

[0043] At the end of the core 1, on both the outer and inner peripheral surfaces, The above reference form and 1 There is no thin portion 3 as in the embodiment, and the reinforcing member 11 is fitted into the fitting recess 4 of the winding core 1 and adhered to the cut-out edge of the fitting recess 4. The fitting recess 4 may have a shape other than U-shape, and the shape of the reinforcing member 11 may be adapted to that shape.

[0044] In this joined state of the winding core 1 and the reinforcing member 11, the outer peripheral surface and the inner peripheral surface of the winding core 1 and the outer peripheral surface and the inner peripheral surface of the reinforcing member 11 are aligned.

[0045] In this reinforcing structure, the torque transmitted from the rotary drive device to the core 1 is received by the reinforcing member 11 attached to the end of the core 1, preventing the end of the core 1 from cracking and curling up. This not only ensures that the torque is transmitted from the rotary drive device to the core 1, but also prevents the film or sheet from being damaged.

[0046] In addition, since the outer peripheral surfaces of the core 1 and the reinforcing member 11 are flush with each other, even if the film or sheet shifts in the axial direction of the core 1 when it is wound around the core 1, it will not get caught on the reinforcing member 11.

[0047] Furthermore, since the inner diameter of the end side of the winding core 1 does not change, there is no need to change the mounting portion of the shaft of the existing rotation drive device.

[0048] <Other> In addition In each of the above embodiments, the winding core 1 is made of FRP and the reinforcing member 11 is made of metal, but the winding core 1 and the reinforcing member 11 may be made of other materials as long as the reinforcing member 11 has higher strength against shear forces in the rotational direction than the winding core 1. For example, the winding core 1 may be made of GFRP (glass fiber reinforced plastic) as a general FRP, and the reinforcing member 11 may be made of high-strength CFRP (carbon fiber reinforced plastic).

[0049] In addition, among the above embodiments, the core 1 Outside The reinforcing member 11 overlaps on the circumferential side. First embodiment In the embodiment, the reinforcing member 11 is fixed to the winding core 1 by adhesion, but the reinforcing member 11 may be fixed to the winding core 1 by fastening means such as bolts.

[0050] In addition, Second and third In the embodiment, both ends of the core 1 Add to Cart The example shown has an engagement recess 12 for the strong member 11, but the core 1 has Complement The strong member 11 may have an engagement recess 12 .

[0051] In addition, the above Second and third In the embodiment , supplement Engagement recess in strong member 11 12 However, depending on the shape of the shaft of the rotary drive device, , supplement The strong member 11 has an engagement recess. 12 Alternatively, a convex portion may be formed to engage the shaft of the rotary drive device. [Explanation of symbols]

[0052] 1 Roll core 2 Engagement recess 3 Thin section 4 Inset recess 5 Winding part 11 Reinforcement members 12 Engagement recess 20 Shaft 21 Mounting part 22 Engagement protrusion

Claims

1. A thin-walled portion (3) is provided on the outer peripheral surface of an end portion of a resin winding core (1), and a reinforcing member (11) having a higher strength than the winding core (1) against a shear force in the rotational direction and having no engagement recess on the rotation drive device side is fitted into the thin-walled portion (3), This is a reinforcing structure for a winding core for winding a film or sheet, in which the torque of a rotary drive device is received by the reinforcing member (11) so that the reinforcing member (11) and the winding core (1) rotate integrally, and the end face of the winding core (1) and the end face of the reinforcing member (11) are aligned.

2. The reinforcing structure of a winding core as described in claim 1, characterized in that the winding core (1) is made of FRP, and the reinforcing member (11) made of metal is fitted and bonded to the thin-walled portion (3) provided on the outer peripheral surface.

3. A reinforcing member (11) having a higher strength against a shear force in the rotational direction than the resin winding core (1) is attached to an end face of the resin winding core (1) by adhesive, The outer peripheral surface and the inner peripheral surface of the winding core (1) are aligned with the outer peripheral surface and the inner peripheral surface of the reinforcing member (11), This reinforcing structure for a core for winding a film or sheet is configured so that the torque of a rotary drive device is received by the reinforcing member (11) and the reinforcing member (11) and the core (1) rotate integrally.

4. A winding core (1) made of resin is provided at an end thereof with an insertion recess (4), and a reinforcing member (11) having a higher strength than the winding core (1) against a shear force in the rotational direction is fitted into the insertion recess (4), This reinforcing structure for a core for winding a film or sheet is configured so that the torque of a rotary drive device is received by the reinforcing member (11) and the reinforcing member (11) and the core (1) rotate integrally.

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