JP2004072834A - Corner protector for flat cable, and installation method of flat cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for installing a flat cable capable of forming a bent corner by a simple work. <P>SOLUTION: The method includes a process for removing a sheath of protection parts (2 and 3) over a prescribed length on both sides of a cable part (1) of a flat cable, A process where a corner protector is prepared which comprises a groove extending in arc to house the cable (1) of the flat cable, and the cable of the flat cable in which the protection part is removed is disposed in the groove (10) of the corner protector, and a process for securing the corner protector and the flat cable on the floor surface. Since the cable is easily bent after the protection part on both sides of the cable is removed, it is easily disposed, in bent state, in the groove of the corner protector. Thus, the part forming the corner is protected from an external force by the corner protector, which is almost equal to a state where a protection part exists on both sides. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flat cable laying method, and more particularly to a flat cable laying method for laying a flat cable so as to form a corner, and a corner protector used in the laying.
[0002]
[Prior art]
Flat cables are widely used as indoor wiring for LANs. This flat cable includes a cable portion in which four or eight stranded wires are arranged in parallel in one plane, and a protection portion provided on both sides of the cable portion and having a trapezoidal cross section. When this flat cable is used for floor wiring, it is often laid in a curved shape so as to form a corner on the floor surface. However, since the flat cable has a flat cross section, it is difficult to lay the cable in a curved shape so as to form a corner in the plane of the cable.
[0003]
Conventionally, as a method of forming and laying a corner in a flat cable, as shown in FIG. 1, a method of forming cuts in protection portions on both sides of a cable portion has been used. When laying the flat cable, the operator forms a number of wedge-shaped cuts in the sheath of the protection part on one side, forms a linear cut in the sheath of the protection part on the other side, and forms a wedge-shaped cut. The corner is formed by curving the side where the is formed to the inside.
[0004]
[Problems to be solved by the invention]
The above-described method of forming a corner by forming a cut has drawbacks in workability and accuracy. That is, it is necessary to define the number of cut portions, the pitch of the cut, and the cut angle in accordance with the bending angle. However, appropriately setting the cut angle and the number of cut portions requires a high level of skill. Another disadvantage is that it takes a long time to form a large number of cuts at the work site.
[0005]
Accordingly, an object of the present invention is to provide a method of laying a flat cable which can be laid so that a corner is formed in the flat cable by a relatively simple operation.
[0006]
Still another object of the present invention is to provide a corner protector capable of forming corners at various bending angles when laying a flat cable on a floor.
[0007]
[Means to solve the problem]
The flat cable laying method according to the present invention is a method of laying a flat cable having a cable portion in which a plurality of strands are arranged substantially parallel to each other in one plane and protective portions located on both sides of the cable portion on a floor surface. A method of laying a flat cable to be laid so that a corner is formed,
Removing the sheath of the protection part on both sides of the cable part of the flat cable over a predetermined length,
Preparing a corner protector having a groove extending in an arc shape for accommodating the cable portion of the flat cable, and arranging the cable portion of the flat cable from which the protection portion has been removed in the groove of the corner protector,
Fixing the corner protector and the flat cable to the floor surface.
[0008]
Since the sheath material of the flat cable has flexibility, when the protection portions on both sides of the cable portion of the flat cable are removed, the remaining cable portion easily bends and deforms in the plane where the strands are arranged. be able to. By inserting the cable portion into the groove of the corner protector while bending the cable portion, the cable portion is curved and held along the arc of the groove. As a result, when fixed to the floor, the cable portion is maintained in a state where it is protected from external force by the protective flange portions located on both sides, and the cable portion forming the corner is substantially equivalent to the case where the protective portions exist on both sides. The effect of maintaining the state is achieved.
[0009]
A corner protector for a flat cable according to the present invention is a corner protector for a flat cable used for laying a flat cable so that a corner is formed,
It has a groove extending in an arc shape, and an inclined surface formed on both sides in the extending direction of the groove, and when viewed from a cross-sectional direction orthogonal to the extending direction of the groove, the flat cable A plurality of strands have a depth and a width for accommodating the cable portions that are arranged substantially parallel to each other in the position plane, and when the corner protector is arranged on the floor, the inclined surface is inclined with respect to the floor. It is characterized by being connected smoothly. By using such a corner protector, the cable portion is curved and held in the groove, so that the effect of maintaining the cable portion forming the corner in a state substantially equivalent to the presence of the protective flange on both sides is achieved. Is done.
[0010]
In a modified example of the corner protector according to the present invention, at both ends where the groove ends, substantially parallel reference planes are formed, and a linear distance between the reference planes is set along the arc of the arc-shaped groove. The distance between both ends is substantially equal. When this corner protector is used, the length of the protective portion to be removed is defined by the distance between the reference surfaces, so that the work on site can be further simplified.
[0011]
In a modified example of the corner protector according to the present invention, the corner protector is made of a material that can be compressed and deformed, and a plurality of wedge-shaped cuts are formed in one peripheral edge along the extending direction of the groove with the groove interposed therebetween. A plurality of linear cuts are formed in the peripheral edge along the extending direction of the groove. In the corner protector for a flat cable, since the corner protector itself can be bent and deformed in one plane, an effect of freely setting a bending angle, that is, a degree of bending of the corner is achieved.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
2 shows an example of a flat cable, FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along a plane orthogonal to the extending direction of the cable. The flat cable has a cable section 1 for accommodating four strands, and protection sections 2 and 3 formed on both sides of the cable section to protect the cable section. The cable part 1 accommodates four strands, and these four strands extend in parallel in one plane. Note that the cable section is not limited to four strands, and can accommodate eight strands or the like. The cable section 1 and the protection sections 2 and 3 extend in parallel in one plane, and thin connecting sections 4 and 5 are provided between the cable section 1 and the protection sections 2 and 3.
[0013]
FIG. 3 shows a state where a part of the protection on both sides of the cable portion of the flat cable is removed. The sheath of the flat cable is made of a dielectric polymer such as polyethylene, has relatively high flexibility, and can be formed with scissors or the like. In addition, since the forming section and the protection section are only connected by a thin connection section, a cut is formed in the sheath of the protection section, and the protection section is peeled off from the cable section to extend the protection section over a predetermined length. It can be easily removed.
[0014]
4 shows an example of a corner protector used in the method of laying a flat cable according to the present invention. FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view when viewed as a cross section orthogonal to the extending direction of the groove. is there. The corner protector according to the invention has a groove 10 extending in an arc. The groove 10 accommodates the cable portion 1 of the flat cable from which the protection portions 2 and 3 have been removed, and the depth and width thereof are set to be slightly larger than the thickness and width of the cable portion 1. . On both sides of the groove 10, protection flanges 11a and 11b are provided. The protective flange functions to protect the cable portion housed in the groove 10. These protective flanges include flat portions 12a and 12b and oblique portions 13a and 13b. By providing the oblique side in this way, when the corner protector is installed on the floor, the edge of the corner protector gently continues to the floor. In addition, since the polyethylene which is the material of the sheath of the flat cable is flexible and deformable, and the width of the cable from which the protection portions 2 and 3 are removed is small in the direction perpendicular to the axial direction, the cable extends in an arc shape. Even when the cable portion 1 is housed in the existing groove 10, the housing is maintained while maintaining its flatness.
A gap can be made between the first end face 14a of the corner protector and the opposite second end face 14b. The bending angle, that is, the radius R of the groove extending in the arc shape, that is, the bending angle, can be set to a desired bending angle.
[0016]
In this example, reference surfaces 15a and 15b parallel to each other are formed on the first and second end surfaces. The linear distance between these parallel reference planes is set to the axial length of the arc-shaped groove 10, that is, the axial length of the protection portion housed in the groove 10, that is, the length along the arc. With this configuration, the length of the protection portion to be removed at the site in the axial direction is substantially equal to the distance between the parallel reference surfaces 15a and 15b, so that the distance between the surfaces 14a and 14b is set to the reference scale. And the length of the protection part to be removed can be defined.
[0017]
The corner protector can be made of various hard or soft synthetic resin materials such as PVC, PE, PP, PS, and PC, and metal materials.
[0018]
Next, a method of laying a flat cable on the floor using the above-described corner protector will be described. First, the position forming the corner of the flat cable to be laid is specified. Next, a corner protector is prepared, a portion of the flat cable at which a corner is to be formed is overlapped with the reference surfaces 15a and 15b of the corner protector, and two cuts are formed in the protective portion using these reference surfaces. Then, the protection portion is removed along the portions where these cuts are formed. At this time, since the groove is formed between the protection portion and the cable portion and is only connected by the thin connection portion, the protection portion can be easily removed manually.
[0019]
Next, the cable portions of the flat cable are accommodated in the grooves 10 of these protectors. At this time, the cable portion from which the protection portions on both sides are removed can be easily curved and held in the groove. Then, the protector and the flat cable are fixed to the floor using a means such as a tape or an adhesive. This completes the laying operation.
[0020]
Next, modified examples of these protectors will be described. FIG. 5 is a plan view and a sectional view showing a modification of these protectors. In this example, a large number of wedge-shaped cuts are formed in the flange portion 11a provided on one side of the groove 10 for accommodating the cable portion, and a large number of linear cuts are formed in the flange portion 11b on the other side. These cuts are formed in advance. Then, a flexible synthetic resin material or a compressible deformable material such as PVC, PP, PS, PE or the like is used as the material of the corner protector. When laying the flat cable, these protectors are bent by a desired angle with the flange portion 11a having the wedge-shaped cut formed inside and the flange portion 11b formed with the straight-shaped cut formed outside. Since the corner protector itself is bent to a desired angle by this bending action, a corner protector having a desired angle can be set on site. Then, the cable portion of the flat cable from which the protective portion has been removed is inserted into the groove, and the corner protector is bent while being inserted and held, and fixed to the floor surface using a tape or an adhesive.
[Brief description of the drawings]
FIG. 1 is a diagram of a flat cable for explaining a conventional flat cable laying method.
FIG. 2 is a diagram showing a configuration of a flat cable.
FIG. 3 is a diagram showing a flat cable from which a protection unit has been removed.
FIG. 4 is a diagram showing an example of a corner protector according to the present invention.
FIG. 5 is a diagram showing a modified example of a corner protector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cable part 2, 3 Protection part 10 Groove 11a, 11b Flange part 12a, 12b Flat part 13a, 13b Oblique part 14a, 14b End surface 15a, 15b Reference surface

Claims (4)

Laying a flat cable having a cable portion in which a plurality of strands are arranged substantially parallel to each other in one plane and protection portions located on both sides of the cable portion so that a curved corner is formed on the floor surface. Flat cable laying method,
Removing the sheath of the protection part on both sides of the cable part of the flat cable over a predetermined length,
Preparing a corner protector having a groove extending in an arc shape for accommodating the cable portion of the flat cable, and arranging the cable portion of the flat cable from which the protection portion has been removed in the groove of the corner protector,
Fixing the corner protector and the flat cable to the floor surface. A corner protector for a flat cable used to lay the flat cable so that a corner is formed,
It has a groove extending in an arc shape, and an inclined surface formed on both sides in the extending direction of the groove, and when viewed from a cross-sectional direction orthogonal to the extending direction of the groove, the flat cable A plurality of strands have a depth and a width for accommodating the cable portions that are arranged substantially parallel to each other in the position plane, and when the corner protector is arranged on the floor, the inclined surface is inclined with respect to the floor. Corner protector for flat cables, characterized by smooth and continuous connection. 3. The corner protector for a flat cable according to claim 2, wherein substantially parallel reference planes are formed at both ends where the groove terminates, and a linear distance between the reference planes is determined by the arc-shaped groove. A corner protector for a flat cable, wherein the distance between both ends along the arc is substantially equal. 4. The corner protector for a flat cable according to claim 2, wherein the corner protector is made of a material that can be compressed and deformed, and a plurality of wedges are formed on one peripheral edge of the groove along the extending direction of the groove. A corner protector for a flat cable, wherein a cut is formed, and a plurality of linear cuts are formed in the other peripheral edge along the extending direction of the groove.

Images