JP2015186396A - cable bending apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable bending apparatus capable of bending-back of a cable even in a narrow space without remaining plastic deformation of the cable cased by bending-back.SOLUTION: A cable bending apparatus comprises: a cable holding member 2 that fixes one side part in the longitudinal direction around a bending or bending-back planned part of a cable 1; a cable clamp member 3 that is movably engaged with the other side part in longitudinal direction; a cable protecting block 4 that is detachably mounted to an outer peripheral surface of the bending or bending-back planned part and disperses loads acting to the cable; a cable bending member 5 that is arranged so as to be movable forwards and backwards to the bending or bending-back planned part through the cable protecting block; and a bending mechanism 6 that urges the cable bending member in an advance direction in a state that the bending mechanism is rotatably connected to the cable holding member and cable clamp member, and a distance to the cable holding member and cable clamp member is restricted.

Description

  The present invention relates to a cable bending apparatus capable of bending and returning a cable even in a dense location of a highly rigid cable, for example.

  As a conventional bending device such as a cable, there is a device capable of bending a long one such as a cable having high bending rigidity (for example, see Patent Documents 1 to 3). These bending devices such as cables are formed in a jig (cable bender) for bending a cable into an arc shape, or in an arc shape with a curvature radius corresponding to the bending radius of the cable, and the cable bending radius can be selected. . Furthermore, there is a jig for bending a cable once bent in the opposite direction (see, for example, Patent Document 4), but it is intended for a flexible cable having a small bending rigidity.

Japanese Patent Laid-Open No. 60-40617 (pages 1 and 2, FIGS. 2, 3) JP-A-60-28706 (pages 2 and 3, FIGS. 1 to 7) Japanese Patent Laying-Open No. 2008-6475 (first page, FIG. 1) Japanese Patent Laying-Open No. 2013-5686 (first page, FIG. 1)

  The conventional cable bending apparatus is only intended to bend a cable having high rigidity, and is not considered for the use of bending back the cable. Further, in a cable in which the cable sheath or the like is plastically deformed, there is a possibility that the plastic shape remains locally and bends during bending back. In particular, in an MI cable (inorganic insulating cable) that uses a metal sheath, the metal sheath undergoes plastic deformation during bending, and therefore it is difficult to return to the original shape when bending back. There was a problem.

  The present invention has been made to solve the above-mentioned problems. The cable can be bent and bent back even in a narrow space, and when the cable is bent back, the original plastic deformation is prevented. An object of the present invention is to obtain a cable bending apparatus that can be bent back so that the shape does not remain.

  A cable bending apparatus according to the present invention includes a cable holding member that fixes one side in a longitudinal direction centered on a planned bending portion or a bent back portion of a cable, and a longitudinal direction with respect to the other side portion of the cable. A cable clamp member that is movably engaged along the cable, a cable protection block that is detachably attached to an outer peripheral surface of the planned bending portion or the planned bending return portion, and distributes a load acting on the cable; A cable bending member disposed so as to be able to advance and retreat via the cable protection block with respect to the part to be bent back, and is rotatably connected to the cable holding member and the cable clamp member, and the cable Bending machine for urging the cable bending member in the advancing direction in a state where the distance to the clamping member and the cable clamp member is constrained If, and to include a.

  According to the present invention, a cable protection block for distributing a load is attached to a planned bending portion or a bending back portion of a cable, and the cable is installed on one side and the other side in the longitudinal direction of the bending or bending back portion. The cable protection block is mounted via the cable bending member in a state where the distance to the cable clamping member and the cable clamp member is constrained by a bending mechanism that is rotatably connected to the clamping member and the cable clamp member. Since the cable is bent by pressing the planned bending or unbending portion of the cable, the load can be dispersed so that concentrated load does not act on the cable. The plastic shape does not remain because the bending load can be kept constant within the bending range of the cable. Can Unisuru. In addition, since the configuration is simple and the cable bending apparatus can be formed thinly along the plane of bending / bending of the cable, the cable can be bent and bent back in a narrow place.

It is a whole block diagram which shows notionally the state when the bent cable is bent back by the cable bending apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing which shows notionally the bending return part of the cable with which the cable protection block shown by FIG. 1 was mounted | worn. It is a figure explaining operation | movement when a cable is bent by the cable bending apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the operation | movement when a cable is bent back by the cable bending apparatus which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
Hereinafter, a cable bending apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. 1 is an overall configuration diagram conceptually showing a state when a bent cable is bent back by the cable bending apparatus according to Embodiment 1 of the present invention, and FIG. 2 shows the cable protection block shown in FIG. It is sectional drawing which shows notionally the bending return part of the mounted | worn cable. In this document, the “cable bending device” includes both a function of bending a cable and a function of returning the cable. In addition, unless specifically distinguished in the description, the concept of “bending” includes, for example, a processing mode in a case where a cable bent in an arc shape is bent back into a linear shape.

  In the figure, the cable bending apparatus is configured to clamp a cable that fixes one side (in this case, the left side) in the longitudinal direction centered on the portion to be bent back (the portion curved in an arc shape in FIG. 1) to the rigid. A member 2, a cable clamp member 3 that is movably engaged in the longitudinal direction with respect to the other side portion of the cable 1 in the longitudinal direction, and an outer peripheral surface of the cable 1 that is to be bent back are detachably mounted. With respect to the cable protection block 4, the cable bending member 5 made of a cable bending plate disposed so as to be able to advance and retreat via the cable protection block 4 with respect to the part to be bent back, the cable clamping member 2 and the cable clamp member 3. The cable bending member 5 is moved in the advancing direction (cable in a state where the distances to the cable clamping member 2 and the cable clamp member 3 are constrained so as to be pivotable. Includes a bending mechanism 6 biases) the.

  The cable clamping member 2 and the cable clamp member 3 are configured so that they can be attached to the long cable 1 at an arbitrary position in the longitudinal direction. Since any of these can be configured by appropriately selecting a known technique, illustration and description are omitted. Further, between the cable clamp member 3 and the cable 1, the cable sheath 1 a (illustrated in FIG. 2) constituting the outer shell of the cable 1 is damaged by interposing a not-shown guide roller, for example. The structure does not cause

  The cable protection block 4 that transmits the cable pressing force to the cable 1 is a metal member that protects the cable 1 by dispersing the load acting on the planned bending back portion of the cable 1. Is divided into a plurality of block pieces 41 arranged on the bending center side and an outer peripheral side with respect to the bending center. A plurality of block pieces 42 provided, a connecting member 41C having elasticity for connecting the central block pieces 41 and 41 adjacent to each other in the longitudinal direction of the cable 1, and the outer peripheral block pieces 42 and 42 are connected to each other. The connecting member 42C having elasticity, the connecting body of the block piece 41 on the center side, and the connecting body of the block piece 42 on the outer peripheral side are fixed to each other with the cable 1 interposed therebetween. And a fixed band (not shown), is made from.

  As shown in FIG. 2, a semicircular groove 41a and a groove 42a for mounting the cable 1 are formed on the opposing surfaces of the block piece 41 and the block piece 42 which are divided into the central side and the outer peripheral side. Is formed along the longitudinal direction of the cable 1. The block pieces 41 and 42 and the grooves 41a and 42a having a semicircular cross section may be formed on curved surfaces having appropriate curvatures along the longitudinal direction of the cable 1 when the bending radius of the cable 1 is small. . In addition, the number of block pieces 41 and 42 may be increased to shorten the length per block. And after connecting the connection body of the block piece 41 and the connection body of the block piece 42 with respect to the outer peripheral surface of the cable 1 via the shock absorbing material 7, it is each in several places of a longitudinal direction with the said fixing band which is not illustrated. Fixed to each other.

  The cable bending member 5 transmits a bending force (bending return force) to the cable 1 via the cable protection block 4 by a bending mechanism 6 described later, and protrudes in the advancing direction, that is, the direction in which the bending force is applied. A plurality of cables having different curvatures according to the bending radius of the cable 1 are prepared in advance. The material is not particularly limited, but a metal material is preferable.

  The bending mechanism 6 is disposed on a center line on the side of the bending center of the planned bending portion or on the side of the anti-bending center of the planned bending back portion, and is provided with a screw hole (not shown) coaxial with the center line. 61 and a screw member 62 which is screwed into a screw hole of the support base 61 and is provided so as to be able to advance and retreat so as to be substantially coaxial with the center line, and has a cable bending member 5 pivotally attached to one end facing the cable 1. A handle 63 provided on the other end side of the screw member 62 and rotating the screw member 62, one end portion being rotatably connected to the cable holding member 2 by the axis S, and the other end portion being connected to the support base 61. The first link member 64 that is rotatably connected by S, one end portion is rotatably connected to the cable clamp member 3 by the axis S, and the other end portion is rotatably connected to the support base 61 by the shaft S. The second link member 65 It is configured. The operation trajectory of the cable bending apparatus having the bending mechanism 6 or the central position of the constituent members is configured to extend in the same plane including the planned bending portion or the planned bending return portion of the cable 1.

  The first link member 64 is provided with a first slide lock member 643 on one end side, and the other end side is supported on the support base 61 so as to be rotatable about the axis S, and one end portion is a cable. A first B connecting rod 642 is connected to the clamping member 2 so as to be rotatable about the axis S, and the other end is supported to the first slide lock member 643 so as to be rotatable about the axis S. The second link member 65 is provided with a second slide lock member 653 on one end side, and a second A connecting rod 651 having the other end side rotatably supported by the support base 61 on the axis S, and one end portion. Is connected to the cable clamp member 3 so as to be rotatable about the axis S, and the other end portion is composed of a second B connecting rod 652 supported on the second slide lock member 653 so as to be rotatable about the axis S. The first slide lock member 643 is configured to be movable along the first A connecting rod 641 and to be fixed to the first A connecting rod 641 at an arbitrary position of the moving destination excluding the end portion. Similarly, the second slide lock member 653 is configured so that it can be fixed to the second A connecting rod 651 at an arbitrary position excluding the end.

  Next, the operation of the embodiment configured as described above will be described with reference to FIGS. 3 is a diagram for explaining the operation when the cable is bent by the cable bending apparatus according to the first embodiment of the present invention. FIG. 4 is a view for bending the cable by the cable bending apparatus according to the first embodiment of the present invention. It is a figure explaining the operation | movement at the time of returning. 3 and 4, (a) shows the state when the cable bending apparatus is set, (b) shows the middle process of bending or unbending, and (c) shows the state when the bending or unbending process is finished. Yes. In the drawing, an arc-shaped double-ended arrow indicates that the rotation is possible, and a linear double-ended arrow indicates that the slide movement is possible.

  First, when the linear cable 1 is bent into an arc shape, the cable bending apparatus is mounted as shown in FIG. At that time, the cable protection block 4 is mounted so that the center in the longitudinal direction thereof coincides with the center portion of the cable 1 to be bent. Further, the screw member 62 is adjusted such that the length extending from the support base 61 on the installation side of the handle 63 is larger in the downward direction than the length on the cable bending member 5 side. In addition, the first A connecting rod 641 and the second A connecting rod 651 have their positions relative to the first slide lock member 643 and the second slide lock member 653 adjusted so that the angle formed by each other is close to 180 °, respectively. The first slide lock member 643 and the second slide lock member 653 are locked.

  Next, by turning the handle 63 counterclockwise, the screw member 62 is moved upward in the figure, and the rotational force is pushed upward against the cable bending member 5 pivotally supported by the screw member 62. The force is converted into a force, and a pressing force in the direction of arrow A acts on the cable 1, and simultaneously, a force in the direction of arrow B acts as a reaction force on the support base 61 screwed with the screw member 62. On the other hand, the support base 61 is connected to the cable holding member 2 on the left side of the drawing via the first A connecting rod 641 and the first B connecting rod 642, and is further connected to the cable clamp member 3 on the right side of the drawing with the second A. Since the distance between the connecting pin 651 and the second B connecting rod 652 and the distance to the cable holding member 2 and the cable clamp member 3 is constrained within a certain range, the cable 63 is rotated by the further rotation of the handle 63. The sandwiching member 2 and the cable clamp member 3 are drawn downward by the support base 61, and the left and right cable sandwiching members 2 and the cable clamp member 3 are centered on the contact point between the cable bending member 5 and the cable protection block 4. Is perpendicular to the longitudinal direction of the cable 1 and a bending force is applied to the cable 1 in the cable bending direction indicated by the arrows C1 and C2. And, via the state of FIG. 3 (b), the state of FIG. 3 (c).

  In the case of the first embodiment, each of the first link member 64 and the second link member 65 uses three rotating portions having the axis S. For example, any one of the shafts S is provided. By using a part provided with a rotation lock mechanism (not shown) in the part and locking the rotation of the part at the time of bending operation, redundant operation in the bending process can be suppressed. The first and second slide lock members 643 and 653 are configured such that the first A connecting rod 641 and the first B connecting rod 642, and the second A connecting rod 651 and the second B connecting rod 652 can be slide-locked coaxially. The rotation lock mechanism can be omitted by using two rotation portions.

  Further, since the cable clamp member 3 moves in the direction of the arrow D during the bending process, the bending shape changing is confirmed, and the first A connecting rod 641 and the first slide lock member 643 and the second slide lock member 653 are used. A load is applied to the cable 1 while appropriately adjusting the locking position with respect to the second A connecting rod 651. Then, the handle 1 is rotated until the curvature of the cable 1 matches the curvature of the cable bending member 5, and the cable 1 is bent. The bending shape of the cable 1 can be arbitrarily changed by changing the curvature of the cable bending member 5.

Next, when the cable 1 bent into an arc shape is bent back into a straight line, the support base 61 of the bending mechanism 6 is located on the side opposite to the center of the cable 1 as shown in FIG. Wear so that it is located in The cable protection block 4 may be linear in the longitudinal direction, but may be curved from the beginning for easy mounting. Further, the angle between the first A connecting rod 641 and the second A connecting rod 651 is smaller than 180 ° from the beginning as compared to the case of cable bending.
The operation at the time of bending back is substantially the same as that at the time of bending the cable. A pressing force in the upward direction is applied to the cable 1 to apply a pressing force in the direction of arrow E to the cable 1. A force in the direction of arrow F acts on the screw member 62 as a reaction force to push down the support base 61 in the downward direction in the figure.

  Due to the downward pressing force, the cable clamping member 2 and the cable clamp member 3 are drawn downward by the support base 61, and bending forces indicated by arrows G1 and G2 act on the cable 1 as shown in FIG. After the state (b), the state becomes as shown in FIG. 4 (c), and the cable 1 is bent back to be, for example, a straight line. The cable clamp member 3 slides in the direction of arrow H shown in FIG. 4C (or the opposite direction) in the process of bending back, thereby preventing unreasonable deformation of the cable 1 at the clamp portion. In the state of FIG. 4A, the positional relationship between the support base 61 connected by the first link member 64 and the cable holding member 2 is relative to the tangential direction of the cable 1 at the mounting portion of the cable holding member 2. It is necessary to select the initial position of the support base 61 so that the force of the arrow G1 is generated in the cable 1. The same applies to the second link member 65 side.

  As described above, according to the present invention, the cable protection block 4 is attached to the outer peripheral surface of the cable 1 at the portion to be bent or the portion to be bent, and acts on the bent surface of the cable 1 by the pressing force from the cable bending member 5. It is possible to disperse the load. When the cable 1 including the plastically deformed cable sheath 1a is bent back, the cable protection block 4 applies a load evenly to the cable bending surface so that a bent shape due to plastic deformation of the cable 1 does not remain. It becomes possible. Further, by installing the cushioning material 7 between the cable protection block 4 and the cable sheath 1a, the cable protection block 4 is effectively prevented from being damaged to the cable sheath 1a so that the function of the cable 1 is not impaired. be able to.

  As the connecting members 41C and 42C, for example, an elastic material such as a hinge or a spring having a U-shaped cross section can be used to cope with a change in the bending rate of the cable 1. The rigidity of the connecting members 41C and 42C can be arbitrarily changed. The rigidity of the inner connecting member 41C in the cable bending direction is reduced, and the rigidity of the outer connecting member 42C is increased, so that the bending of the cable 1 is increased. In returning, the role of assisting the force of the cable bending member 5 is provided. Further, since the cable bending member 5 can be changed to an arbitrary shape, the cable 1 can be bent and bent back when the cable 1 is bent and bent back.

  Further, it is easy to make the shape of the cable bending device thinner and lighter than a conventional cable bender, and the center line of each member constituting the cable bending device is located in the bent surface of the cable 1. Therefore, it is easy to reduce the thickness. For this reason, this apparatus can be used even in places where cables are densely packed, and can be applied to highly rigid cables such as MI cables. Further, the present apparatus can be used even when one of the cables 1 is connected to a wall or the like. In addition, since the rotary handle 63 is used to apply the pressing force to the cable bending member 5, by appropriately increasing the handle diameter, it is possible to directly apply the bending force by human power to the cable. Can be applied to highly rigid cables.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention. For example, it goes without saying that the shape and configuration of the cable protection block 4, the cable bending member 5, the bending mechanism 6, the engagement relationship between the constituent members, and the like can be appropriately modified or changed.

  1 cable 1a cable sheath 2 cable clamping member 3 cable clamp member 4 cable protection block 41 block piece 41a groove 41C connecting member 42 block piece 42a groove 42C connecting member 5 cable bending member 6 Bending mechanism 61 Support base 62 Screw member 63 Handle 64 First link member 641 First A connecting rod 642 First B connecting rod 643 First slide lock member 65 Second link member 651 Second A connecting rod , 652 2B connecting rod, 653 second slide lock member, 7 cushioning material, S axis.

Claims (8)

  A cable clamping member for fixing one side portion in the longitudinal direction centering on the planned bending portion or unbending portion of the cable, and a cable clamp engaged with the other side portion of the cable so as to be movable in the longitudinal direction A member, a cable protection block that is detachably attached to an outer peripheral surface of the planned bending portion or the planned bending return portion, and distributes a load acting on the cable; A cable bending member disposed so as to be able to advance and retreat via a block, and a distance to the cable clamping member and the cable clamp member that are rotatably connected to the cable clamping member and the cable clamp member, respectively. And a bending mechanism for urging the cable bending member in the advance direction in a state where the cable is restrained. Le bending apparatus.   The cable protection block is divided into a plurality in the longitudinal direction of the cable, and the cable protection block is divided into two on the center side and the outer peripheral side with respect to the bending center direction, and a plurality of grooves having a semicircular cross section are formed on the opposing surfaces. A connecting member for connecting the central block pieces adjacent to each other in the longitudinal direction of the cable, and a connecting member for connecting the block pieces adjacent to each other in the longitudinal direction of the cable. The cable bending apparatus according to claim 1, comprising:   The cable bending apparatus according to claim 2, wherein the connecting member is made of an elastic member having a U-shaped cross section in a side view.   4. The cable bending apparatus according to claim 3, wherein spring elasticity of the elastic member is changed between a center side and an outer peripheral side with respect to the bending center portion direction.   The cable bending apparatus according to any one of claims 1 to 4, wherein a buffer material is provided between an outer peripheral surface of the cable and the cable protection block.   2. The cable bending member according to claim 1, wherein the cable bending member is curved and formed in an arc shape so as to be convex in an advancing direction, and one having a different curvature is selected according to a bending radius of the cable. The cable bending apparatus according to claim 5.   The bending mechanism is disposed on a center line on the bending center portion side of the planned bending portion or on the anti-bending central portion side of the planned bending back portion, and a support base provided with a screw hole coaxial with the center line; A screw member that is screwed into a screw hole of a support base and is provided so as to be able to advance and retreat coaxially with the center line; and the other end portion of the screw member, the cable bending member being pivotally attached to one end portion facing the cable A handle for rotating the screw member, a first link member having one end rotatably connected to the cable holding member and the other end rotatably connected to the support base, and one end And a second link member rotatably connected to the cable crank member and having the other end rotatably connected to the support base. Any of up to Of cable bending apparatus.   The first link member is provided with a first slide lock member on one end portion side, the other end portion is rotatably supported by the support base, and one end portion is connected to the cable holding member. The second link member is connected to the first slide lock member and is rotatably supported by the first slide lock member. The second link member is provided with a second slide lock member on one end side. A second A connecting rod whose other end is rotatably supported by the support base, one end is rotatably connected to the cable crank member, and the other end is rotated to the second slide lock member. The cable bending apparatus according to claim 7, comprising a second B connecting rod that is movably supported.

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