JP2004075125A - Cored binding strap and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wire at both ends of a cored binding strap 2 from being ejected from a covering thermoplastic resin. <P>SOLUTION: In the cored binding strip in which a wire 5 forms a core, and the wire 5 is covered with a thermoplastic resin 4, recesses 5a or projections 5b are formed in the wire 5. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cored binding band suitable for use in binding electric wires, bundling an opening of bagged food, binding a vine stem of a cultivated plant to a column, and a method for producing the same.
[0002]
[Prior art]
2. Description of the Related Art In general, a cored binding band using a wire as a core material is used for binding electric wires, binding an opening of bagged food, binding a vine stem of a cultivated plant to a support, and the like.
[0003]
As shown in FIGS. 7 and 8, this conventional cored binding band uses a wire 3 as a core material, and extrudes a thermoplastic resin 4 such as PVC, PE, PP, or PUR onto the wire 3 using an extruder. It is covered so as to have the blade portion 4a.
[0004]
[Problems to be solved by the invention]
By the way, when this conventional cored binding band is used and, for example, the cords 1 are bundled as shown in FIG. 6, the cored binding band 2 is cut into a predetermined length and wound, and the final two terminals are twisted and finished. However, at the time of this twisting operation, there may be a difference in extension between the covering thermoplastic resin 4 and the wire 3, and at both ends of the cored binding band 2 having the difference in extension, FIG. As shown in FIGS. 1 and 2, the wire 3 sometimes protrudes from the thermoplastic resin 4 covering the wire 3.
[0005]
Further, when both ends of the cored binding band 2 are twisted, even when the wires 3 at both ends of the cored binding band 2 do not protrude from the covering thermoplastic resin 4, there is residual stress. As shown in FIG. 6, there is a temperature change in the stock of the product, and there is a difference in heat shrinkage between the wire 3 and the thermoplastic resin 4. Therefore, at both ends of the cored binding band 2, the wire 3 As shown in the figure, there was a case where the resin protruded from the covering thermoplastic resin 4.
[0006]
Further, even if there is no residual stress, there is a difference in thermal shrinkage between the wire (metal) 3 and the thermoplastic resin 4, so that the temperature difference ( For example, day and night, winter and summer) may occur, and the wires 3 at both ends of the cored binding band 2 may protrude from the covering thermoplastic resin 4 as shown in FIGS. 9A and 9B.
[0007]
When the wire 3 at both ends of the cored binding band 2 protrudes from the covering thermoplastic resin 4 as shown in FIGS. There was an inconvenience.
[0008]
In view of the above, an object of the present invention is to improve the possibility that the wires at both ends of the cored binding band protrude from the covering thermoplastic resin.
[0009]
[Means for Solving the Problems]
The cored binding band of the present invention is a cored binding band in which a wire is used as a core material and the wire is coated with a thermoplastic resin, and the wire has a concave shape or a convex shape.
[0010]
According to the present invention, since the wire as the core material is provided with a concave shape or a convex shape, the wire and the thermoplastic resin covering the wire have not only surface friction, but also mechanical slip due to the concave or convex shape. Prevention is also added, and the amount of protrusion from the thermoplastic resin covered with wires at both ends of the cored binding band can be reduced.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of a cored binding band of the present invention and a manufacturing method thereof will be described with reference to FIGS. 1, 2, 3 and 7.
[0012]
The cored binding band 2 according to the present embodiment uses the wire 5 as a core material. As shown in FIG. 2, the wire 5 is provided at one side and the other side of the wire 5 at predetermined intervals with, for example, a V-shaped recess. As shown in FIGS. 1 and 7, a thermoplastic resin 4 such as PVC, PE, PP, or PUR is extruded into a wire 5 having a concave shape 5a at a predetermined interval, as shown in FIGS. Coating to have 4a.
[0013]
In this case, as shown in FIG. 1 in the sectional view taken along the line VIII-VIII in FIG. 7, the thermoplastic resin 4 bites into the concave shape 5a of the wire 5 as shown in FIG.
[0014]
In order to manufacture the cored binding band 2 according to the present example, as shown in FIG. 3, the wire 5 is first formed into a concave shape 5a by a concave shape processing machine 10 for forming a concave shape 5a at a predetermined interval on the wire 5, Thereafter, the wire 5 provided with the concave shape 5a is guided to an extruder 11 for thermoplastic resin such as PVC, PE, PP, PUR, etc., and the core material as shown in FIG. A cored binding band 2 of a predetermined length is formed by covering a wire 5 having a recessed shape 5a at a predetermined interval with a thermoplastic resin 4 such as PVC, PE, PP, or PUR having a blade portion 4a. Is wound on a reel or the like.
[0015]
When using the cored binding band 2 wound on a reel or the like, the cored binding band 2 is cut into a predetermined length according to the application.
[0016]
In this example, since the wire 5 as the core material is provided with the concave shape 5a, the wire 5 and the thermoplastic resin 4 covering the wire 5 not only have a surface friction, but also have a mechanical slip due to the concave shape 5a. For example, as shown in FIG. 6, when bundled cords 1 are bound and twisted at both ends of a cored binding band 2 cut to a predetermined length, wires at both ends of the cored binding band 2 are provided. 5, the amount of protrusion from the coated thermoplastic resin 4 can be reduced as compared with the conventional case.
[0017]
Also, for example, when the cord 1 as shown in FIG. 6 is bound by the cored binding band 2 of this example, and this product is stocked and a temperature difference (for example, day and night, winter and summer, etc.) occurs during stocking, The wire 5 and the thermoplastic resin 4 covering the wire 5 not only have surface friction, but also prevent mechanical slippage due to the concave shape 5a. 4, the amount of protrusion can be reduced as compared with the conventional case.
[0018]
In the above-described example, the concave shape 5a of the wire 5 is V-shaped, but the concave shape 5a is V-shaped in cross section as shown in FIG. 4A, rectangular in cross section as shown in FIG. 4B, and trapezoidal in cross section as shown in FIG. 4C. And as shown in FIG. 4D, the section may be a tab table type or the like.
[0019]
Further, in the above-described example, the concave shape 5a is formed on the wire 5, but the concave shape 5a may be replaced with a convex shape 5b as shown in FIG. It can be easily understood that the same effect can be obtained when the wire 5 as the core material is provided with the convex shape 5b.
[0020]
In addition, the present invention is not limited to the above-described example, and it goes without saying that various other configurations can be adopted without departing from the gist of the present invention.
[0021]
【The invention's effect】
According to the present invention, since the wire as the core material is provided with a concave shape or a convex shape, not only the surface friction between the wire and the thermoplastic resin covering the wire, but also mechanical due to the concave or convex shape. Slip prevention is also added, and the amount of protrusion of the wire at both ends of the cored binding band from the thermoplastic resin covered can be reduced as compared with the conventional case.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an example of an embodiment of a cored binding band of the present invention.
FIG. 2 is a perspective view showing an example of a main part of FIG.
FIG. 3 is a configuration diagram showing an example of an embodiment of a method of manufacturing a cored binding band of the present invention.
FIG. 4 is a diagram showing another example of the concave shape.
FIG. 5 is a sectional view showing a main part of another example of the embodiment of the present invention.
FIG. 6 is a perspective view showing a usage example of a cored binding band.
FIG. 7 is a perspective view showing an example of a cored binding band.
FIG. 8 is a cross-sectional view of a conventional cored binding band taken along line VIII-VIII (FIG. 7).
FIG. 9 is a diagram for describing the present invention.
[Explanation of symbols]
2 cored binding band, 4 thermoplastic resin, 5 wire, 5a concave, 5b convex, 10 concave processing machine, 11 extruder

Claims (3)

In a cored binding band in which a wire is used as a core material and the wire is coated with a thermoplastic resin,
A cored binding band, wherein the wire has a concave shape or a convex shape. The cored binding band according to claim 1,
The cored binding band, wherein the concave shape or the convex shape of the wire is provided at predetermined intervals along a longitudinal direction of the wire. After providing a concave or convex shape to the wire as the core material,
A method for producing a cored binding band, wherein the wire is coated with a thermoplastic resin.

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