JP2009171794A - Cable bending jig and cable bending method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable bending jig capable of bending a to-be-bent spot of a cable into a bend radius that is within a permissible bend radius of the cable. <P>SOLUTION: The cable bending jig 1 is used to bend the cable 10 with a bend radius not smaller than the permissible bend radius. The cable bending jig 1 has a support portion 2 which is formed into an arcuate shape having a radius of curvature corresponding to the permissible bend radius of the cable 10, and is put on the inner diameter side of the to-be-bent spot 11 of the cable 10 to prevent the to-be-bent spot 11 from being bent into a bend radius smaller than the permissible bend radius of the cable 10 when the to-be-bent spot 11 of the cable 10 is bent. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cable bending jig and a cable bending method, and in particular, a cable bending jig and a cable bending effective for bending a bending target portion of a cable such as a communication cable and a distribution cable to a bending radius greater than an allowable bending radius. Regarding the method.

  Cables such as communication cables and wiring cables used for equipment installed in mobile base stations and various factories are used for structures such as office buildings and factories so as not to hinder the operation of the equipment. It is laid on the ceiling of the cabinet via a cable rack.

  When laying cables via a cable rack, it is necessary to change the cable laying direction by bending the cable at the corners of the cable rack or at the part that is pulled into the equipment. Care must be taken not to bend into a radius.

  For this reason, it is necessary to bend the cable while confirming the allowable bending radius of the cable with technical data from the manufacturer, and the work of bending the cable is very troublesome. In addition, a location different from the location that should be originally confirmed may be mistakenly confirmed in technical data or the like, and the cable may be bent to a bending radius smaller than the allowable bending radius. Furthermore, in consideration of the allowable bending radius of the cable, the bending radius of the corner portion of the cable rack may be increased more than necessary to take a wasteful space for installation of the cable rack. Further, after bending the cable, it is very troublesome to confirm whether or not the bending target portion of the cable is bent with a bending radius larger than the allowable bending radius.

  As an example of a technique for bending a cable, Patent Document 1 provides a bent plate having a bending radius larger than the bending radius of the cable at a bent portion of a fixed base (cable rack) that supports the cable. A cable laying method is described in which a bent portion of a cable is arranged at a predetermined interval on the inner diameter side, and the movement of the bent portion of the cable is limited to the distance to the bent plate.

  As another example, in Patent Document 2, a coaxial cable is bent at a predetermined bending radius and bending angle, a metal fixture is attached to the bent portion, and the bent portion of the coaxial cable is attached by the metal fixture. Is described so as to be held at a predetermined bending radius and bending angle.

However, Patent Document 1 and Patent Document 2 do not describe the point of bending the cable bending target portion so as not to be smaller than the allowable bending radius of the cable.
Japanese Patent Laid-Open No. 5-184040 Japanese Utility Model Publication No. 7-1533

  The present invention has been made in view of the above-described conventional problems, and can easily and reliably bend a cable bending target portion so as not to have a bending radius smaller than an allowable bending radius. An object of the present invention is to provide a cable bending jig capable of easily confirming whether or not a bending target portion of a cable is bent to a bending radius greater than or equal to an allowable bending radius.

In order to solve the above problems, the present invention adopts the following means.
That is, the invention according to claim 1 is a cable bending jig for bending a cable so as not to have a bending radius smaller than the allowable bending radius, and a curvature radius corresponding to a bending radius greater than the allowable bending radius of the cable. When the bending target portion of the cable is bent, the bending target portion is directed to the inner diameter side of the bending target portion of the cable, and the bending target portion is bent smaller than the allowable bending radius of the cable. It is provided with the support part which regulates being done.

According to the cable bending jig of the present invention, the support portion is directed to the inner diameter side of the cable bending target portion, and the cable bending target portion is bent along the bending shape of the support portion, thereby the cable bending target portion. Is curved into a shape corresponding to the curved shape of the support portion, and the bending of the cable to be bent at a bending radius smaller than the allowable bending radius of the cable is restricted.

  The invention according to claim 2 is the cable bending jig according to claim 1, wherein the support portion is provided with a fixing member for fixing the support portion to a bending target portion of the cable. It is characterized by that.

  According to the cable bending jig according to the present invention, since the support portion is fixed to the bending target portion of the cable by the fixing member, the bending target portion of the cable is bent into a shape corresponding to the bending shape of the support portion. Will be held.

  The invention according to claim 3 is the cable bending jig according to claim 1 or 2, wherein a groove having a circular arc section is provided on the outer diameter side of the support portion, and the cable is bent in the groove. A portion on the inner diameter side of the target portion is fitted.

  According to the cable bending jig according to the present invention, the portion on the inner diameter side of the cable bending target portion is fitted in the groove on the outer diameter side of the supporting portion, so that the supporting portion is detached from the cable bending target portion. It is possible to prevent the cable from being bent, and it is possible to keep the cable bending target portion bent in a shape corresponding to the curved shape of the support portion.

  The invention according to claim 4 is the cable bending jig according to any one of claims 1 to 3, wherein the support portion has notches penetrating the inside and outside of the groove at predetermined intervals in the longitudinal direction. The support portion is formed in an arc shape having a curvature radius corresponding to a bending radius greater than an allowable bending radius of the cable by bending the support portion so as to close the notch provided at a plurality of locations. Features.

  According to the cable bending jig of the present invention, an angle at which the notch of the support portion is closed by placing the support portion at the bending target portion of the cable and bending the bending target portion of the cable integrally with the support portion in this state. Thus, the support portion and the bending target portion of the cable are bent integrally, and the bending target portion of the cable is prevented from being bent with a bending radius smaller than the allowable bending radius.

  The invention according to claim 5 uses the cable bending jig according to any one of claims 1 to 4, the support portion of the cable bending jig is directed to the inner diameter side of the bending target portion of the cable, and the support portion The portion to be bent of the cable is bent along the curved shape.

  According to the cable bending method of the present invention, the cable bending jig support portion is directed to the inner diameter side of the cable bending target portion, and the cable bending target portion is bent along the bending shape of the support portion. This prevents the portion to be bent from being bent at a bending radius smaller than the allowable bending radius of the cable.

  The invention according to claim 6 is configured by connecting a plurality of cable bending jigs according to any one of claims 1 to 4, and supporting portions of the plurality of cable bending jigs having a required length of the cable. It is directed to the target portion, and the bending target portion is bent along the curved shape of the support portion.

  According to the cable bending method of the present invention, by connecting a plurality of cable bending jigs, the bending target portion of the required length of the cable is prevented from being bent with a bending radius smaller than the allowable bending radius. become.

As described above, according to the present invention, the support portion is directed to the inner diameter side of the bending target portion of the cable, and the bending portion of the cable is bent along the bending shape of the supporting portion. The target portion is curved into a shape corresponding to the curved shape of the support portion, and the bending of the target portion with a bending radius smaller than the allowable bending radius of the cable is restricted.
Therefore, the performance of the cable is not deteriorated because the bending target portion of the cable is bent with a bending radius smaller than the allowable bending radius of the cable. Further, whether or not the cable bending target portion is bent with a bending radius larger than the allowable bending radius of the cable is determined by the support portion addressed to the inner diameter side of the cable bending target portion and the cable bending target portion. Since it is only necessary to visually confirm the contact state, the confirmation operation can be performed easily and accurately.

  Further, since the support portion is fixed to the bending target portion of the cable by the fixing member, the bending target portion of the cable can be held in a state of being curved into a shape corresponding to the bending shape of the support portion. It is possible to continue to hold the portion to be bent of the cable in a state of being bent more than the allowable bending radius of the cable.

  Furthermore, since the portion on the inner diameter side of the cable bending target portion is fitted in the groove on the outer diameter side of the support portion, it is possible to prevent the support portion from being detached from the cable bending target portion, and the cable bending target portion. Can be held in a curved state corresponding to the curved shape of the support portion, and the bending target portion of the cable can be kept in a curved state larger than the allowable bending radius of the cable in the long term.

  Further, the support portion is applied to the bending target portion of the cable, and in this state, the bending portion of the cable is bent integrally with the supporting portion, so that the support portion and the bending target portion of the cable are angled so that the notch of the support portion is closed. Are bent together, and the bending target portion of the cable is restricted from being bent with a bending radius smaller than the allowable bending radius. Accordingly, it is possible to easily and accurately perform the operation of bending the bending target portion of the cable beyond the allowable bending radius of the cable.

  Further, by connecting a plurality of cable bending jigs, it is possible to restrict the bending target portion of the required length of the cable from being bent with a bending radius smaller than the allowable bending radius of the cable.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 5 show a first embodiment of a cable bending jig according to the present invention. FIG. 1 is a plan view showing the entire cable bending jig, and FIG. 2 is an arrow A in FIG. FIG. 3 is a sectional view taken along the line BB of FIG. 1, FIG. 4 is a plan view showing a state where the cable bending jig of FIG. 1 is attached to a bending target portion of the cable, and FIG. It is line sectional drawing.

  That is, the cable bending jig 1 of the present embodiment is a cable such as a communication cable or a wiring cable (hereinafter referred to as “cable 10”) used in equipment installed in a mobile base station or various factories. )), Which is applicable to bend the bending target portion 11 so that the bending radius of the bending target portion 11 of the cable 10 is not smaller than the allowable bending radius of the cable 10. It is.

  A cable 10 used for equipment installed in a mobile base station, various factories, etc. is, for example, a cable rack (not shown) on the ceiling of a structure of a mobile base station station, a factory, or the like. The cable rack is bent at a predetermined angle at a corner portion of the cable rack or at a drawing portion from the cable rack to the equipment, and the direction is changed to be drawn from the cable rack to the equipment.

  When the cable 10 is bent, it is necessary to bend so that the bending radius of the bending target portion 11 of the cable 10 does not become smaller than the allowable bending radius of the cable 10 based on the technical data provided by the manufacturer. In this case, the cable bending jig 1 according to the present embodiment is used.

  As shown in FIGS. 1 to 3, the cable bending jig 1 according to the present embodiment includes a support portion 2 addressed to the inner diameter side of the bending target portion 11 of the cable 10, and the support portion 2 as a bending target of the cable 10. A fixing member 6 that is fixed to the portion 11, and the support portion 2 regulates the bending target portion 11 of the cable 10 so as not to be bent smaller than the allowable bending radius of the cable 10. 11 is held in a state of being bent more than the allowable bending radius of the cable.

  The support portion 2 has an arc shape formed from a synthetic resin, and is formed in an arc shape having a radius of curvature equal to or greater than the allowable bending radius of the cable 10. The outer diameter side of the support portion 2 is curved on the cable 10. The cable 10 is provided on the inner diameter side of the bending target portion 11 so as to reach the inner diameter side of the target portion 11.

  Here, the allowable bending radius of the cable 10 means the bending radius at the center of the cable 10, and the length obtained by subtracting the radius of the cable 10 from the bending radius at the center of the cable 10 is set as the curvature radius of the support portion 2. Is done.

  The support portion 2 is formed to have a length corresponding to the entire length of the bending target portion 11 of the cable 10, and when the support portion 2 reaches the inner diameter side of the bending target portion 11 of the cable 10, It is designed to support the entire area.

A groove 3 having a circular arc shape corresponding to the cross-sectional shape of the cable 10 is provided on the outer diameter side of the support portion 2, and the outer diameter side of the support portion 2 is directed to the inner diameter side of the bending target portion 11 of the cable 10. When this occurs, the inner diameter side portion of the bending target portion 11 of the cable 10 is fitted into the groove 3. Thereby, it can prevent that the support part 2 remove | deviates from the internal diameter side of the bending | flexion object location 11 of the cable 10. FIG.

  Both ends in the longitudinal direction of the support portion 2 are formed on the rounded surface 4, and when the support portion 2 is applied to the inner diameter side of the bending target portion 11 of the cable 10, the bending target portion 11 of the cable 10 at both ends of the support portion 2. This prevents the surface coating from being scratched.

  The support portion 2 is integrally formed in an arc shape having a groove 3 on the outer diameter side by various plastic molding methods. Alternatively, after forming into a bowl shape by various plastic molding methods, it is formed into an arc shape by various bending processes.

  The fixing member 6 is composed of, for example, a synthetic resin fixing band 6 that is integrally attached to the support portion 2, and is provided at, for example, three positions of both end portions and a central portion of the support portion 2 in the longitudinal direction. The support portion 2 is directed to the inner diameter side of the bending target portion 11 of the cable 10, the bending target portion 11 of the cable 10 is bent along the bending shape of the supporting portion 2, and then each fixed van 6 is bent to the bending of the cable 10. By tightening to the target portion 11, the support portion 2 is fixed to the bending target portion 11 of the cable 10, and the bending target portion 11 of the cable 10 is held in a curved state corresponding to the curved shape of the support portion 2. The

In addition, you may provide the fixed band 6 not only in 3 places but in 2 places or 4 places or more. In addition, the fixing member 6 is not limited to the fixing band 6, and may have any structure that can fix the support portion 2 to the bending target portion 11 of the cable 10. The support portion 2 may be fixed to the bending target portion 11 of the cable 10 by winding an insulating tape or the like around the support portion 2 and the cable 10 in a state of being directed to the inner diameter side of the portion 11.

  When the cable 10 is bent using the cable bending jig 1, the cable bending jig 1 is arranged on the inner diameter side of the bending target portion 11 of the cable 10 as shown in FIG. The bending target portion 11 of the cable 10 is bent in the direction of the arrow in the drawing along the groove 3 on the outer diameter side of the support portion 2. As a result, the bending target portion 11 of the cable 10 is bent into a shape corresponding to the bending shape of the support portion 2, and the inner diameter side portion of the bending target portion 11 of the cable 10 is placed in the groove 3 on the outer diameter side of the support portion 2. It is inserted.

  In this state, by fixing the fixed band 6 at both ends of the support part 2 and the fixed band 6 at the center part to the bending target part 11 of the cable 10, the support part 2 is directed to the inner diameter side of the bending target part 11 of the cable 10. It is fixed in a broken state, and the bending target portion 11 of the cable 10 is held in a state bent to a bending radius corresponding to the curvature radius of the support portion 2.

  As described above, in the cable bending jig 1 according to the present embodiment, the support portion 2 formed in an arc shape having a curvature radius equal to or larger than the allowable bending radius of the cable 10 is formed on the bending target portion 11 of the cable 10. Since the bending target portion 11 of the cable 10 is bent along the groove 3 on the outer diameter side of the support portion 2, the bending target portion 11 of the cable 10 has an allowable bending radius of the cable 10. It is not bent with a smaller bending radius, and the performance of the cable 10 is not deteriorated.

  Further, whether or not the bending target portion 11 of the cable 10 is bent more than the allowable bending radius of the cable 10 can be confirmed by visually checking the contact state between the support portion 2 and the bending target portion 11 of the cable 10. Therefore, the confirmation operation can be performed easily and accurately.

  6 and 7 show a second embodiment of the cable bending jig 1 according to the present invention. FIG. 6 shows a state in which the cable bending jig 1 is attached to the bending target portion 11 of the cable 10. FIG. 7 shows a state where the bending target portion 11 of the cable 10 is bent.

  That is, as shown in FIG. 6, the cable bending jig 1 is provided with notches 5 penetrating the inside and outside of the groove 3 in a support portion 2 formed in a bowl shape at a plurality of locations at predetermined intervals in the longitudinal direction. The support portion 2 is directed to the inner diameter side of the bending target portion 11 of the cable 10, and the cable 10 and the supporting portion 2 are bent integrally, so that the bending target portion 11 of the cable 10 corresponds to the radius of curvature of the support portion 2. It is configured to be bent to a bending radius, and the other configuration is the same as that shown in the first embodiment.

In this case, when the support portion 2 is bent integrally with the cable 10, the support portion 2 is formed in an arc shape having a predetermined curvature radius that is equal to or larger than the allowable bending radius of the cable 10 by being bent so as to close each notch 5. The bending target portion 11 of the cable 10 is bent into a shape corresponding to the arc shape of the support portion 2.
Note that the width and the number of the notches 5 are set in advance so that the support portion 2 has a desired radius of curvature when the notches 5 are closed.

  Even in the cable bending jig 1 according to the present embodiment configured as described above, it is formed in an arc shape having a radius of curvature equal to or greater than the allowable bending radius of the cable 10 as in the first embodiment. Since the supported portion 2 is directed to the inner diameter side of the bending target portion 11 of the cable 10, the bending target portion 11 of the cable 10 is not bent with a bending radius smaller than the allowable bending radius of the cable 10. There will be no degradation in performance.

  Further, whether or not the bending target portion 11 of the cable 10 is bent more than the allowable bending radius of the cable 10 can be confirmed by visually checking the contact state between the support portion 2 and the bending target portion 11 of the cable 10. Therefore, the confirmation operation can be performed easily and accurately.

  In the present embodiment, the bending angle of the support portion 2 can be adjusted by appropriately setting the width and the number of the notches 5 provided in the support portion 2, so that the various cables 10 have an allowable bending radius or more. Can be applied to bend into

  FIG. 8 shows a third embodiment of the cable bending jig 1 according to the present invention. This cable bending jig 1 connects a plurality (two in this embodiment) of cable bending jigs 1 to correspond to the bending of the bending target portion 11 of the required length of the cable 10. Other configurations are the same as those shown in the first embodiment.

  Even in the cable bending jig 1 according to the present embodiment, the support portion 2 formed in an arc shape having a radius of curvature equal to or larger than the allowable bending radius of the cable 10 as in the first embodiment. Is directed to the inner diameter side of the bending target portion 11 of the cable 10, the bending target portion 11 having a required length of the cable 10 is not bent with a bending radius smaller than the allowable bending radius of the cable 10. There will be no degradation in performance.

  Further, whether or not the bending target portion 11 of the cable 10 is bent more than the allowable bending radius of the cable 10 can be confirmed by visually checking the contact state between the support portion 2 and the bending target portion 11 of the cable 10. Therefore, the confirmation work can be performed easily and accurately.

  In each of the embodiments described above, the support portion 2 is formed in a circular arc shape, but may be formed in a triangular shape, a square shape, a hexagonal shape, or the like. Moreover, when there is no fear that the cable 10 will come off from the support part 2, you may form the support part 2 in flat form.

  Further, in each of the above embodiments, one or two cable bending jigs 1 are used to correspond to bending of approximately 90 degrees or approximately 180 degrees, but three or more cable bending jigs 1 are combined. Thus, it may correspond to various angles of curvature.

It is the top view which showed the whole 1st Embodiment of the cable bending jig | tool by this invention. It is A arrow directional view of FIG. It is the BB sectional view taken on the line of FIG. It is the top view which showed the state which attached the cable bending jig | tool of FIG. 1 to the bending object location of a cable. It is CC sectional view taken on the line of FIG. It is the top view which showed 2nd Embodiment of the cable bending jig by this invention, Comprising: It is the top view which showed the state which attached the cable bending jig to the bending object location of a cable. It is the top view which showed the state which curved the bending | flexion object location of the cable. It is the top view which showed 3rd Embodiment of the cable bending jig | tool by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable bending jig 2 Support part 3 Groove 4 Round surface 5 Cutting 6 Fixing member (fixing band)
10 Cable 11 Location to be bent

Claims (6)

A cable bending jig for bending a cable so as not to have a bending radius smaller than an allowable bending radius,
It is formed in an arc shape with a curvature radius corresponding to a bending radius greater than the allowable bending radius of the cable, and when the bending target portion of the cable is bent, it is addressed to the inner diameter side of the bending target portion of the cable, A cable bending jig, comprising: a support portion for restricting the bending target portion from being bent smaller than an allowable bending radius of the cable.   The cable bending jig according to claim 1, wherein a fixing member for fixing the supporting portion to a bending target portion of the cable is provided in the supporting portion.   3. The groove according to claim 1, wherein a groove having a circular arc cross section is provided on an outer diameter side of the support portion, and a portion on an inner diameter side of a bending target portion of the cable is fitted in the groove. Cable bending jig.   The support portion is provided with a plurality of incisions penetrating the inside and outside of the groove at predetermined intervals in the longitudinal direction, and the support portion is curved by bending the support portion so as to close the incision. 4. The cable bending jig according to claim 1, wherein the cable bending jig is formed in an arc shape having a curvature radius corresponding to a bending radius equal to or greater than the allowable bending radius.   5. The cable bending jig according to claim 1, wherein a support portion of the cable bending jig is directed to an inner diameter side of a bending target portion of the cable, and the cable is bent along the bending shape of the support portion. A method of bending a cable, characterized by bending a portion to be bent.   A plurality of cable bending jigs according to any one of claims 1 to 4 are connected to each other, the support portions of the plurality of cable bending jigs are directed to the bending target portion of the required length of the cable, and the support A method of bending a cable, wherein the bending target portion is bent along a curved shape of a portion.

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