JP2007297174A - Bobbin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light bobbin easy to be machined, disassembled, reproduced and exchanged in a part thereof at low costs, and hard to be deformed and bent even in the case wherein a flange part is formed from corrugated fiberboard and having sufficient strength. <P>SOLUTION: The bobbin 10 consists of a barrel part 100 for winding or unwinding a rope-like material such as a wire and a flange part 200 structured in both ends of the barrel part 100. The flange part 200 consists of a flange part main body 210 formed by joining a plurality of discs made of a paper or plastic corrugated fiberboard, and an annular reinforcing belt 220 integrally connected to the peripheral edge of the flange part main body 210. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bobbin.

Conventionally, as a bobbin used to wind and store a relatively heavy string-like member such as a metal wire, a wooden material is used, which is connected to a bobbin with a nail or a screw. It was general. In the case of this conventional wooden bobbin, since the bobbin is formed by driving a large number of nails and attaching screws, it is not easy to process, and it is possible to remove multiple nails that were hit during recycling or disposal. There is a problem in that it is necessary to remove the screw, which requires costs such as work time and labor cost. In addition, when the size is increased, the weight is increased, which is inconvenient for moving and carrying.
On the other hand, Japanese Patent Application Laid-Open No. 11-60074 provides a bobbin made of paper, and Japanese Patent Application Laid-Open No. 11-240085 provides a bobbin made of cardboard.
Japanese Patent Laid-Open No. 11-60074 Japanese Patent Laid-Open No. 11-240085

The bobbin as shown in the above-mentioned Patent Document 1 is an advantage of the bobbin in that it is made of paper and is very light and portable and easy to dispose. On the other hand, since the thickness of the flange portion is thin, the ground area is narrow, and there is a problem that the flange deforms without maintaining strength when a heavy wire is wound around the bobbin.
Moreover, the bobbin as shown in the above-mentioned patent document 2 has a configuration in which cardboard cut pieces integrally cut out from the same cardboard original plate as a flange portion are overlapped, and for warping and twisting due to the physical properties of the cardboard cut pieces themselves. This is an advantage of the bobbin in that it has a preventive effect. On the other hand, since the flutes are arranged in one direction, the strength against external bending force and compressive force varies greatly depending on the direction, and depending on the external load direction, for example, the flange portion overlaps multiple cardboards. Even in the combined configuration, there is a problem that the flange portion is bent or the end portion is buckled. Further, there is a problem that liquid such as water easily penetrates into the cardboard, and the flange portion is deformed by the penetration of the liquid.

  Therefore, the present invention solves the above-described problems of the prior art, is lightweight, can be easily processed, disassembled, regenerated, partially replaced, etc. at low cost, and even when the flange portion is made of cardboard, the flange portion is deformed or seated. It is an object of the present invention to provide a bobbin that is difficult to bend and has sufficient strength.

The bobbin of the present invention for achieving the above object is a bobbin comprising a body part for winding or feeding a string-like member such as a wire, and flange parts formed at both ends of the body part, The flange portion is composed of a flange portion main body formed by laminating a plurality of discs made of paper or plastic corrugated cardboard, and an annular reinforcing band integrally joined to the outer peripheral edge of the flange portion main body. One feature.
In addition to the first feature, the bobbin of the present invention has a second feature that the annular reinforcing band is formed by stacking and joining paper bands in a plurality of layers.

According to the bobbin of claim 1, since the flange portion body is made of paper or plastic corrugated cardboard, it is lightweight and can be easily processed, disassembled, regenerated, partially replaced, etc. at low cost. be able to. Further, since the flange body has a configuration in which a plurality of discs made of paper or plastic corrugated cardboard are bonded together, the strength against an external bending force or compressive force can be increased. In particular, since it has a structure having an annular reinforcing band integrally joined to the outer peripheral edge of the flange body, it acts in a vertical direction from the grounding point even when a large weight is added when the string-like member is wound. By dispersing the force in the circumferential direction by the annular reinforcing band and appropriately elastically deforming at the annular reinforcing band portion, the ground contact area can be increased and the stress concentration can be reduced. Therefore, the dispersion and relaxation action of these stresses can prevent the shape of the flange part body from bending and the end part from buckling. Further, it is possible to prevent deformation of the shape of the flange portion main body against force and compression from multiple directions.
Further, it is possible to prevent the penetration of liquid such as water into the flange portion main body.

  According to the bobbin of the second aspect, in addition to the function and effect of the structure of the first aspect, the annular reinforcing band has a structure in which a plurality of layers of paper band bodies are joined together, so that it is lightweight. Thus, processing, disassembly, regeneration, partial replacement, etc. can be performed easily and at low cost. In particular, even if it is made of paper, it is possible to withstand a load applied in a radial direction to the flange portion with sufficient strength because a plurality of layers of the band bodies are joined together.

A bobbin according to an embodiment of the present invention will be described with reference to the following drawings.
1 is an overall perspective view of a bobbin according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the bobbin according to the embodiment of the present invention, FIG. 3 is a longitudinal sectional view of the bobbin according to the embodiment, and FIG. FIG. 5 shows an annular reinforcing band, (A) is an overall perspective view, and (B) is a partially enlarged view thereof. 6A and 6B are cross-sectional views of the flange portion for explaining a state where a load is applied to the bobbin. FIG. 6A is an overall cross-sectional view, and FIG. 6B is a partially enlarged view thereof.

As shown in FIG. 1, the bobbin 10 includes a body portion 100 and a pair of flange portions 200 and 200.
The body portion 100 is used for winding or feeding a wire-like string member, and for example, a body member formed by laminating paper materials such as liner paper around a drum so as to form a cylindrical shape is used. However, it may be made of paper, plastic, wood, or other materials as long as it has a certain strength in a cylindrical shape, and the cross-sectional shape may be any of round, square, etc. Is possible. However, a round cylinder is usually used. The size, thickness, and the like can be freely changed depending on the use of the bobbin, such as the thickness and winding length of the string-like member wound around the bobbin.

2 to 4, the pair of flange portions 200 and 200 are members that support the body portion 100 from both sides, and include a flange portion main body 210 and an annular reinforcing band 220.
The flange portion main body 210 is formed by bonding a plurality of circular corrugated cardboard plates 211 punched out of a paper or plastic corrugated cardboard to have a diameter larger than the outer diameter of the body portion 100. As shown in FIG. 4, a plurality of adjacent circular corrugated cardboard plates 211 are bonded by an adhesive applied to the joining surface so that the flutes 211a intersect each other. This can increase the strength. Further, a shaft hole 300 through which a core rod supporting the bobbin 10 is inserted is formed in the flange portion main body 210, and the size thereof is formed to be approximately the same as the inner diameter of the body portion 100 as shown in FIG.
As shown in FIG. 3, a fitting recess 210 a for joining the body 100 is formed on the side of the flange body 210 that is joined to the body 100. The diameter of the fitting recess 210 a is formed to be slightly larger than the diameter of the body portion 100.

  The annular reinforcing band 220 is a member that reinforces the strength of the flange portion body and contacts the ground or the like. The width of the reinforcing band 220 is desirably at least the same as that of the flange portion main body 210. As shown in FIG. 5, the reinforcing band 220 can be constituted by, for example, a paper band 221 stacked in a plurality of layers and coupled. By overlapping the plurality of layers, the strength against the force acting in the vertical direction from the ground contact point to the flange body 210 can be greatly improved. Of course, it is not limited to this. The sizes and the like of the flange portion main body 210 and the reinforcing band 220 can be freely changed according to the use of the bobbin, such as the thickness and winding length of the string-like member wound around the bobbin.

The assembly of the bobbin 10 in this embodiment will be described.
Now, one body 100 is prepared, and two each of a flange body 210 and an annular reinforcing band 220 each having a plurality of circular cardboard plates 211 are prepared. And the both ends of the trunk | drum 100 are sequentially adhere | attached on the fitting recessed part 210a of the flange part main body 210, and it fits together. As a result, a bobbin is formed in which the flange portion main body 210 is disposed on both end portions of the body portion 100. In this state, the shape is a bobbin shape, but the whole is not yet completed. This is a so-called temporary assembly state. Next, the pair of annular reinforcing bands 220 and 220 are bonded and joined to the flange portion main body 210 to complete the strong bobbin 10 in which the flange portion main body 210 is reinforced by the annular reinforcing band 220. Of course, the annular reinforcing band 220 is bonded and bonded to the outer periphery of the flange main body 210 to complete the flange portion 200, and then the flange portion 200 is fitted to the body portion 100 and bonded to complete the bobbin 10. It may be.

  Referring to FIG. 6, in a state where the reinforcing band 220 is coupled to the flange portion main body 210, when the weight increases due to the string-like member being wound around the bobbin 10, the flange portion 200 is moved when the bobbin 10 is grounded. The stress received in the vertical direction from the contact point increases. When the reinforcing band 220 is not coupled to the flange portion main body 210, the stress acts directly on the end portion of the corrugated cardboard of the flange portion main body 210 to deform and buckle the end portion. In the present invention, the peripheral edge of the flange portion main body 210 is sufficiently reinforced by the annular reinforcing band 220, and the vertical stress from the contact point is dispersed in the circumferential direction of the reinforcing band 220, so that the deformation resistance and the buckling resistance are improved. Is increasing. Further, the contact area is increased by elastic deformation by the reinforcing band 220. Further, since the strength of the reinforcing band 220 in the width direction is large, it is possible to sufficiently increase the strength against bending stress applied to the flange portion 200 having the reinforcing band 220. Therefore, the strength of the bobbin 10 can be improved.

1 is an overall perspective view of a bobbin according to an embodiment of the present invention. It is a disassembled perspective view of the bobbin which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the bobbin which concerns on embodiment of this invention. It is the partial expanded sectional view which notched a part of flange part. An annular reinforcement band is shown, (A) is an overall perspective view, and (B) is a partially enlarged view thereof. The flange part explaining the state to which the load was applied to the bobbin is shown, (A) is sectional drawing of the whole flange part, (B) is the elements on larger scale.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Bobbin 100 Body part 200 Flange part 210 Flange part main body 210a Fitting recessed part 211 Corrugated disk 211a Flute part 220 Reinforcement belt 221 Paper-made belt body 300 Shaft hole

Claims (2)

  A bobbin comprising a body part for winding or feeding a string-like member such as a wire, and flange parts configured at both ends of the body part, the flange part being made of a paper or plastic cardboard plate A bobbin comprising: a flange portion main body formed by laminating a plurality of discs, and an annular reinforcing band integrally joined to an outer peripheral edge of the flange portion main body.   The bobbin according to claim 1, wherein the annular reinforcing band is formed by stacking and joining paper bands in a plurality of layers.

Images