JP2013106431A - Repair member for cable protection tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a repair socket inserted into an existing cable protection tube from being removed from the cable protection tube without fail in a repair member for the cable protection tube fixed to a part where degradation part has been removed for repairing the degradation part of the existing cable protection tube inside of which a cable is inserted.SOLUTION: In a repair member for a cable protection tube, from an end 10a of an existing cable protection tube 10 on one side of a degradation part removed from the existing cable protection tube 10, one end of a repairing socket 12 is inserted in the cable protection tube 10, and to the other end of the repairing socket 12, an end 10b of the existing cable protection tube 10 on the other side can be connected through a connection tube 30. In the repair member, a holding member 20 is provided between the existing cable protection tube 10 on one side and the repairing socket 12 which exerts a stopper function by being subjected to a pressing force of the repair socket 12 in moving in a removing direction from the existing cable protection tube 10 on one side and enlarged in a radial direction.

Description

  The present invention relates to a repair member for a cable protection tube used for repairing a deteriorated portion of a protection tube having a cable disposed therein.

  Various cables, such as telephone lines, may be laid in the air due to restrictions on drawing into facilities or other topographical restrictions. For example, the case where a cable is laid over the sky so that a river, a road, etc. may be crossed is mentioned.

  A cable laid in the air is inserted into a metal or resin cable protection tube supported by the ground or a structure, and is protected from damage. For example, when the cable is laid across a river or the like, both ends of the cable protection tube are supported by the abutment. In addition, when attached to a bridge or the like, the cable protection tube may be supported by the bridge girder at some places along the length direction at portions other than both ends thereof.

  This type of cable protection tube is exposed to wind and rain and is strongly affected by changes in the temperature of the outside air. For this reason, compared with underground cable protection pipes, corrosion tends to proceed more quickly. Therefore, in order to repair the corroded portion, a method of removing the corroded portion and replacing the removed portion with a repair member is employed.

  When the cable protection tube is pulled out from the wall surface of a structure such as an abutment, stress due to the weight of the cable or the cable protection tube itself or external force tends to concentrate on the cable protection tube near the wall surface. For this reason, in the cable protection tube, the support point to the structure, that is, the portion close to the wall surface is relatively prone to corrosion and deterioration.

  As a repair member of the cable protection tube, for example, there is one shown in FIG. The repair member 1 employs repair sockets 2 and connecting pipes 3 and 4 each made up of a pair of half-circular pipes having a semicircular cross section obtained by dividing a cylinder into two in the circumferential direction. The reason why the member is divided in two is to perform repair without cutting the cable.

  First, in the cable protection tube 10, the corrosion / deteriorated portion near the wall surface of the structure (abutment A) that is a support point is cut and removed. Then, as shown in FIG. 18, one end of the repair socket 2 composed of a pair of half pipes is inserted into the existing cable protection pipe 10 embedded in the abutment. The other end of the repair socket 2 is connected to the existing cable protection pipe 10 on the side opposite to the abutment A via connecting pipes 3 and 4 each consisting of a pair of half-circular pipes that are also divided in half. Connect to. Finally, the outer periphery of the repair member 1 is tightened with a stainless steel band or the like at several points in the axial direction, and the repair member 1 and the existing cable protection tube 10 are integrated (for example, see Patent Document 1).

JP 2006-191717 A

  In the conventional cable protection tube repair member 1 shown in FIG. 18, the existing cable protection tube 10 and the repair member 1 are fixed by an adhesive. That is, the retaining of the repair socket 2 with respect to the existing cable protection tube 10 mainly depends on the adhesive strength of the adhesive.

  For this reason, in the event of an earthquake or the like, when an external force larger than expected is applied, the repair socket 2 may come out of the existing cable protection tube 10. For this reason, a structure in which the stopper is more firmly secured is desired.

  Therefore, the present invention provides a repair member for a cable protection tube that is fixed to the removed portion after removing the deteriorated portion in order to repair the deteriorated portion of the existing cable protection tube through which the cable is inserted. Another object of the present invention is to more reliably prevent a repair socket inserted into an existing cable protection tube from coming out of the cable protection tube.

  In order to solve the above problems, the present invention removes a deteriorated portion of an existing cable protection tube into which a cable is inserted, and then removes the deteriorated portion and sandwiches the removed portion on both sides. In the repair member of the cable protection tube that is connected so as to connect the ends of the existing cable protection tube, the repair is performed from the end of the existing cable protection tube on one side to the inside of the cable protection tube with the removed portion interposed therebetween. Insert one end of the socket for repair, and connect the end of the cable protection tube on the other side to the other end of the repair socket with the removed portion sandwiched through the connection tube. When the repair socket is about to move out of the existing cable protection tube on the one side between the existing cable protection tube and the repair socket, the repair socket Further comprising a holding member for being expanded-diameter pressure employing a repair section of a cable protection tube, characterized in.

  According to this configuration, when a large external force acts on the cable protection tube during an earthquake or the like and the repair socket attempts to move out of the existing cable protection tube, the holding member is attached to the repair socket. The diameter is increased by being pressed, and it adheres to the inner surface of the existing cable protection tube with a strong force. For this reason, the retaining of the repair socket can be made stronger.

  In this configuration, the connection pipe includes a bent portion that allows bending on one side and the other side along the tube axis direction of the existing cable protection tube, and an extendable portion that allows expansion and contraction along the tube axis direction, or A configuration including any of them can be employed.

  According to this configuration, the external force applied to the cable protection tube can be reduced by the action of the bent portion and the expansion / contraction portion, and the force in the pulling direction from the existing cable protection tube applied to the repair socket can be kept low.

  This invention is pressed between the existing cable protection tube and the repair socket when the repair socket is about to move out of the existing cable protection tube on the one side. Since the holding member that expands in diameter is provided, the retaining socket for the repair socket can be strengthened.

Sectional drawing which shows one Embodiment of this invention 1 is an enlarged view of the main part of FIG. The detail of a holding member is shown, (a) is AA sectional drawing of (b), (b) is a front view, (c) is a right view, (d) is a partially cut front view, (e) is Sectional view, (f) is a perspective view of a taper member The details of the repair socket are shown, (a) is a left side view, (b) is a front view, (c) is a right side view, (d) is a partially cut front view, and (e) is a sectional view. The detail of the 1st connection member of a connecting pipe is shown, (a) is a left view, (b) is a front view, (c) is a partially cut front view The detail of the 2nd connection member of a connecting pipe is shown, (a) is AA sectional drawing of (b), (b) is a front view, (c) is a right view, (d) is a partially cut front view The detail of the 3rd connection member of a connecting pipe is shown, (a) is a left view, (b) is a front view, (c) is a right view, (d) is a partially cut front view The details of the use form of the stopper are shown, (a) is an exploded view, (b) is a sectional view showing a state in which the stopper is fitted and fixed to the outer periphery of the connecting pipe, and (c) and (d) are enlarged main parts Cross section The modification of a holding member is shown, (a) is an AA sectional view of (b) on the left side in the figure, BB sectional view of (b) on the right side in the figure, (b) is a front view, (c) Is a right side view, (d) is a partially cut front view, and (e) is a sectional view. Sectional drawing which shows other embodiment of this invention The detail of the 4th connection member of a connecting pipe is shown, (a) is a left view, (b) is a front view, (c) is CC sectional drawing of (b), (d) is a partially cut front view (A)-(e) is explanatory drawing which shows the effect | action of embodiment of FIG. Sectional drawing which shows other embodiment of this invention Sectional drawing which shows other embodiment of this invention Sectional drawing which shows other embodiment of this invention FIG. 15 is an enlarged view of a main part of the embodiment of FIG. The main part of embodiment of FIG. 15 is shown, (a) is a top view, (b) is sectional drawing. The exploded perspective view which shows the repair member of the conventional cable protection pipe

  Embodiments of the present invention will be described with reference to the drawings. This embodiment is used for a cable protection pipe attached to a bridge over a river or the like, and after removing a deteriorated portion of the cable protection pipe, the repair member 11 (hereinafter referred to as a cable protection pipe) is replaced with the removed portion. , Simply referred to as “repair member 11”), and a cable protection pipe repair method using the repair member 11.

  As shown in FIG. 18 used in the description of the conventional example, the existing cable protection tube 10 is supported in a state where both ends thereof are embedded in the concrete of the structure (abutment A). In this embodiment, a portion of the cable protection tube 10 that is near the wall surface of one abutment A is cut and removed, and the ends of the existing cable protection tubes 10 on both sides of the removed portion are sandwiched. The repair member 11 is connected so as to connect between 10a and 10b.

  As shown in FIG. 1, the repair member 11 includes a repair socket 12, a holding member 20, a connecting pipe 30, and the like.

  Each member is a member divided into a plurality along the circumferential direction so that the cable protection tube 10 can be repaired without cutting the cable C. In this embodiment, each member is composed of a pair of half-divided pipe members having a semicircular cross section. However, as long as the cable C can be repaired without being cut, the manner of division is free. For this reason, for example, these may be divided into three or more members along the circumferential direction.

  One end of the repair socket 12 is inserted into the cable protection tube 10 from the end portion 10a of the existing cable protection tube 10 on one side, that is, the end portion 10a on the wall surface side of the abutment A, with the removed portion interposed therebetween. . The other end of the repair socket 12 can be connected to the end 10b of the existing cable protection tube 10 on the other side through the connecting tube 30 with the removed portion interposed therebetween.

  As shown in FIGS. 2 and 4, the repair socket 12 has a tubular shape as a whole, and a hole for inserting a cable passes from one end to the other end in the tube axis direction. Moreover, the one end is provided with the four protrusions 12b along the circumferential direction. Although the number of protrusions 12b is arbitrary, the number of both needs to be the same so that each protrusion 12b can enter a hole 21b provided in a holding member 20 described later. A screw portion 12 d is provided on the outer periphery of the other end of the repair socket 12. In addition, the intermediate part 12a between one end and the other end has a cylindrical shape.

  The holding member 20 is disposed between the existing cable protection tube 10 on one side and the repair socket 12. As shown in FIGS. 2 and 3, the holding member 20 has a cylindrical shape as a whole, and a main body portion 21 through which a hole for inserting a cable passes from one end to the other end in the tube axial direction. The portion 21 is composed of a taper member 22 that is separate from the portion 21. The main body 21 includes four holes 21b at one end along the circumferential direction. As described above, the number of holes 21b is arbitrary as long as it corresponds to the number and position of the protrusions 12b. Further, a flange 21e that protrudes toward the outer diameter side is provided at the other end of the main body 21. In addition, the intermediate part 21a between one end and the other end has a cylindrical shape.

  Like the repair socket 12, the holding member 20 is a pair of halved pipe members, and is arranged in a cylindrical shape on the outer periphery of the cable C, as shown in FIG. A stopper 36 is fitted into the recess 35 so as to be integrated. The repair socket 12 that is a pair of half split pipe members can also be integrated into a cylindrical shape using the same stopper, but in this embodiment, the integration by the stopper is omitted. doing.

Moreover, the hole 21b is provided with an outer diameter side tapered surface 21c gradually approaching the outer diameter side from one end side toward the other end side, as shown in FIG. ing.
As shown in FIG. 3 (f), the taper member 22 includes tapered surfaces 22a and 22b on the edges on one end side and the other end side, respectively. When the taper member 22 is accommodated in the hole 21b as shown in FIG. 2, the taper surface 22b on the other end side of the taper member 22 and the taper surface 21c of the main body 21 come into surface contact. ing.

  In order to fix the repair member 11 to the existing cable protection tube 10, first, one end of the holding member 20 is inserted into the cable protection tube 10 from the cut end portion 10 a of the existing cable protection tube 10. At this time, the holding member 20 is inserted while the taper member 22 is accommodated in the hole 21b. The width of the taper member 22 (the width in the circumferential direction of the holding member 20) is gradually reduced from the outer diameter side toward the inner diameter side, similarly to the width of the hole portion 21b (width in the same circumferential direction). Therefore, the taper member 22 is prevented from falling out of the hole 21b.

  Next, one end of the repair socket 12 is inserted inside the holding member 20. Then, the protrusion 12 b provided at one end of the repair socket 12 enters the hole 21 b of the holding member 20.

  Then, as shown in FIG. 2, the connection pipe 30 is connected to the other end of the repair socket 12. Here, among the plurality of members constituting the connection pipe 30, the first connection member 41 located on the most end side is provided with a screw portion 41 d on the inner periphery on the one end side. When the screw part 41d of the first connection member 41 is screwed into the screw part 12d of the repair socket 12, the repair socket 12 moves little by little in the other end side, that is, in the direction of coming out of the cable protection tube 10. Go.

  When the end surface of the flange 41e provided at one end of the first connection member 41 abuts on the end surface of the flange 21e provided at the other end of the holding member 20, it is provided at one end of the repair socket 12 at the same time. The tapered surface 12c of the protrusion 12b is in surface contact with the tapered surface 22a of the holding member 20 (taper member 22). As a result, the repair socket 12 cannot move to the other end side any more, and the repair socket 12 and the connection pipe 30 are connected.

  In addition, the connection pipe 30 is connected to another member from the first connection member 41 which is a member on the most end side toward the other end side, so that the end portion 10b on the other side of the existing cable protection tube 10 is connected. Connected to tie. If possible, a configuration in which the first connection member 41 is directly connected to the other end 10b of the cable protection tube 10 may be employed.

  In this embodiment, the connection pipe 30 uses three members including a first connection member 41, a second connection member 42, and a third connection member 43. By these three members, a bent portion 31 that allows bending of one side and the other side along the tube axis direction of the existing cable protection tube 10 and a stretchable portion 32 that allows expansion and contraction along the tube axis direction are configured. Has been.

  In addition, as a structure of the connecting pipe 30, as described above, both the bent portion 31 and the stretchable portion 32 may be provided, or a configuration provided with either of them, that is, a configuration provided with only the bent portion 31. Or it can also be set as the structure provided only with the expansion-contraction part 32. FIG. Of course, when it is not necessary to consider the influence of an earthquake etc., it can also be set as the structure which does not have both the bending part 31 and the expansion-contraction part 32. FIG.

  Hereinafter, the structure of the bending part 31 and the expansion-contraction part 32 is demonstrated.

  In this embodiment, the bending part 31 is comprised by the 1st connection member 41 and the 2nd connection member 42, as shown in FIG. The stretchable part 32 includes a second connection member 42 and a third connection member 43.

As shown in FIG. 5, the first connecting member 41 has a tubular shape as a whole, and a hole for inserting a cable passes from one end to the other end in the tube axis direction. At one end in the cylinder axis direction, a flange 41e that protrudes to the outer diameter side is provided. Further, on the inner circumference on one end side, as described above, the screw portion 41d that is screwed with the screw portion 12d of the repair socket 12 is provided.
A spherical portion 41b is provided at the other end in the cylinder axis direction of the first connecting member 41 with the intermediate portion 41a interposed therebetween. The outer surface of the spherical portion 41b is a spherical surface 41c.

  Like the repair socket 12 and the holding member 20, the first connection member 41 is a pair of halved pipe members, and is arranged in a cylindrical shape on the outer periphery of the cable C in the state shown in FIG. As shown by a), a stopper 36 is fitted into the recess 35 so as to be integrated.

  As shown in FIG. 6, the second connection member 42 has a tubular shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. A spherical portion 42b is provided at one end in the cylinder axis direction. The inner surface of the spherical portion 42 b is a spherical surface 42 c that can come into surface contact with the spherical surface 41 c of the first connection member 41. Further, a protrusion 42d protruding toward the inner diameter side is provided on the inner circumference on the other end side, and a circumferential groove 34 is provided on the outer circumference on the entire circumference. The protrusion 42d is a protrusion that is continuous along the entire circumference in the circumferential direction.

  The second connection member 42 is also a pair of split half pipe members, and is arranged in the circumferential groove 34 as shown in FIG. 33 is inserted and integrated. The stopper 33 is composed of a pair of semicircular members, and the protrusions 33a provided at both ends thereof enter the slightly deeper recesses 34a provided at two locations in the circumferential direction of the circumferential groove 34, respectively. Then, the pair of half-split pipe members are clamped and fixed.

As shown in FIG. 7, the third connection member 43 has a tubular shape as a whole, and a cable insertion hole passes from one end to the other end in the tube axis direction. At the other end in the cylinder axis direction, a flange 43e that protrudes toward the outer diameter side is provided. Further, on the inner periphery on the other end side, a screw portion 43d that is screwed with the screw portion 12d of the repair socket 12 is provided.
On the outer periphery on the one end side of the third connection member 43 with the intermediate portion 43a interposed therebetween, a protrusion 43b protruding to the outer diameter side is provided. The protrusion 43b is a protrusion that continues along the entire circumference.

  The third connection member 43 is also a pair of split half members, and, like the first connection member 41, the stopper 36 is fitted into the recess 35 and integrated.

  As shown in FIG. 1, the bent portion 31 is in contact with the spherical surface 41 c of the first connection member 41 and the spherical surface 42 c of the second connection member 42, and slides in contact with each other along the tube axis direction of the cable protection tube 10. Therefore, bending of one side and the other side is allowed, and it functions as a so-called universal joint. For this reason, the member is prevented from being damaged by the bending with respect to the stress mainly acting in the bending direction acting on the cable protection tube 10.

  Similarly, as shown in FIG. 1, the expansion / contraction part 32 extends along the tube axis direction of the cable protection tube 10 while one end of the third connection member 43 enters the other end of the second connection member 42, and both of them slide in contact with each other. It allows expansion and contraction and functions as a so-called expansion joint. For this reason, the member is prevented from being damaged by the expansion and contraction with respect to the stress in the tube axis direction mainly acting on the cable protection tube 10. At this time, the projecting portion 42d projecting toward the inner diameter side and the projecting portion 43b projecting toward the outer diameter side exhibit a function of preventing the stretchable portion 32 from coming off. When the projecting portion 42d and the projecting portion 43b come into contact with each other, the stretchable portion 32 cannot extend any further.

In addition, the 3rd connection member 43 located in the other end side among the members which comprise the connection pipe 30 is the
It has the same structure as the first connection member 41 located on the most end side, and is connected to the other end portion 10 b of the existing cable protection tube 10 via the holding member 20 and the repair socket 12. The connection structure of the connection pipe 30 to the existing cable protection pipe 10 via the holding member 20 and the repair socket 12 of the present invention is such that the cable protection pipe 10 to be connected is embedded in a structure such as an abutment A. It can also be used for parts other than those marked.

As described above, it is assumed that the repair member 11 is connected so as to connect the end portions 10a and 10b of the existing cable protection tube 10 and an external force acts on the cable protection tube 10 due to an earthquake or the like. .
For example, it is assumed that a tensile stress in the right direction shown in FIG. The repair socket 12 tends to move in the direction of exiting from the existing cable protection tube 10 on one side, that is, the direction of exiting from the abutment A (from one end side of the repair socket 12 toward the other end side). At this time, the holding member 20 is pressed in the direction in which it is pulled out by the protrusion 12b of the socket 12 for repair.

  This pressing is because the taper surface 22a of the taper member 22 constituting the holding member 20 and the taper surface 12c of the repair socket 12 are in surface contact with each other, and therefore through the surface contact portion between the taper surfaces 22a and 12c. Done. For this reason, the taper member 22 is pressed to the outer diameter side through the taper surfaces 22a and 12c to expand the diameter, and is in close contact with the inner surface of the existing cable protection tube 10 with a strong force. Therefore, the repair socket 12 is prevented from coming off.

  FIG. 9 shows a modification of the holding member 20. In this modification, the taper member 22 and the main body 21 are integrated. In this manner, the main body portion 21 of the holding member 20 can be formed with a tapered surface 22a that comes into surface contact with the tapered surface 12c of the repair socket 12.

  In this modification, since two slits 21g are provided along the cylinder axis direction from the other end of the hole 21b, the deformation performance to the outer diameter side when the tapered surface 22a is pressed is enhanced. . Concentration of stress is prevented at the other end of the slit 21g by a stop hole 21h.

  Another embodiment is shown in FIG. In this embodiment, a bent portion 31, an extendable portion 32, and a bent portion 31 are arranged in this order along the tube axis direction of the existing cable protection tube 10.

  As a member constituting the connection pipe 30, a fourth connection member 44 is arranged instead of the third connection member 43 of the above-described embodiment, and the first connection member 41 is provided on the other end side of the fourth connection member 44. It is arranged. The first connection member 41 located on the most other end side has the same structure as the abutment A side, and is connected to the other end portion 10b of the existing cable protection tube 10 via the holding member 20 and the repair socket 12. Has been.

  As shown in FIG. 11, the fourth connection member 44 has a cylindrical shape as a whole, and similarly, a cable insertion hole passes from one end to the other end in the tube axis direction. A spherical portion 44b is provided at the other end in the cylinder axis direction with the intermediate portion 44a interposed therebetween. The inner surface of the spherical portion 44 b is a spherical surface 44 c that can come into surface contact with the spherical surface 41 c of the first connection member 41. Further, a protrusion 44d is provided on the outer periphery of the one end side so as to protrude to the outer diameter side. The protrusions 44d are protrusions that are continuous along the entire circumference in the circumferential direction.

  The fourth connecting member 44 is also a pair of halved pipe members divided into two parts, and is disposed in the circumferential groove 34 as shown in FIG. 33 is inserted and integrated.

  The configuration and operation of the expansion / contraction part 32 by the second connection member 42 and the fourth connection member 44 and the bending part 31 by the fourth connection member 44 and the first connection member 41 are the same as those in the above-described embodiment. The operation is shown in FIG.

  FIG. 12A shows a normal state in which the connection pipes 30 of the repair member 11 are aligned in a straight line in the pipe axis direction. FIG. 12B shows a state where the tensile stress in the tube axis direction acts on the cable protection tube 10 and the expansion / contraction part 32 extends. FIG. 12C shows a state where the bending portion 31 on the left side and the bending portion 31 on the right side are bent together due to further stress in the bending direction from the state of FIG. FIG. 12D shows a state in which the length of the expansion / contraction part 32 is slightly shortened from the state of FIG. One of the bent portions 31 is in a bent state and the other is in a normal state. FIG. 12E shows a state in which the tensile stress in the tube axis direction is applied again from the state of FIG.

  Yet another embodiment is shown in FIG. In this embodiment, a fifth connecting member 45, a sixth connecting member 46, and a fourth connecting member 44 are provided between the fourth connecting member 44 and the first connecting member 41 on the other end side in the embodiment of FIGS. Are interposed in order.

  As shown in FIG. 13, the fifth connection member 45 has a tubular shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. Spherical portions 45b are respectively provided at one end and the other end in the cylinder axis direction with the intermediate portion 45a interposed therebetween. The outer surface of the spherical portion 45 b is a spherical surface 45 c that can come into surface contact with a spherical surface 44 c of the fourth connecting member 44 and a spherical surface 46 c of a sixth connecting member 46 described later.

  The fifth connecting member 45 is also a pair of half split pipe members, but in this embodiment, integration by a stopper or the like is omitted. However, it is also possible to integrate them into a cylindrical shape using a similar stopper.

  As shown in FIG. 13, the sixth connection member 46 has a tubular shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. A spherical portion 46b is provided at one end in the cylinder axis direction across the intermediate portion 46a. The inner surface of the spherical portion 46 b is a spherical surface 46 c that can come into surface contact with the spherical surface 45 c of the fifth connecting member 45. Further, on the inner periphery on the other end side, a protrusion 46d protruding toward the inner diameter side and a circumferential groove 34 over the entire periphery are provided. The protrusions 46d are protrusions that are continuous along the entire circumferential direction.

  The sixth connecting member 46 is also a pair of half-split pipe members, and in the state where it is arranged in a cylindrical shape on the outer periphery of the cable C, the stopper 33 is fitted in the circumferential groove 34 as shown in FIG. And integrated.

  Bending portion 31 formed by the fourth connecting member 44 and the fifth connecting member 45, the bending portion 31 formed by the fifth connecting member 45 and the sixth connecting member 46, and expansion / contraction by the sixth connecting member 46 and the fourth connecting member 44. Since the configuration and operation of the unit 32 are the same as those in the above-described embodiment, description thereof will be omitted.

  Yet another embodiment is shown in FIG. In this embodiment, a bent portion 31, an extendable portion 32, an extendable portion 32, and a bent portion 31 are arranged in this order along the tube axis direction of the existing cable protection tube 10.

  The difference from the configuration shown in FIG. 10 is that, in order to continuously arrange two stretchable portions 32, the first member along the tube axis direction of the existing cable protection tube 10 is used as a member constituting the connection tube 30. The connection member 41, the fourth connection member 44, the seventh connection member 47, the fourth connection member 44, and the first connection member 41 are arranged in this order.

  As shown in FIG. 14, the seventh connecting member 47 has a tubular shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. At one end and the other end of the intermediate portion 47a in the cylinder axis direction, a projecting portion 47d protruding toward the inner diameter side is provided on the inner periphery, and a circumferential groove 34 is provided on the outer periphery. The protrusion 47d is a protrusion that is continuous along the entire circumferential direction.

  The seventh connecting member 47 is also a pair of split half pipe members, and the stopper 33 is fitted in the circumferential groove 34 as shown in FIG. And integrated.

  The seventh connecting member 47 and the fourth connecting members 44 arranged on both sides of the seventh connecting member 47 constitute the extendable portion 32, respectively. The configuration and action of the stretchable part 32 are the same as in the above-described embodiment.

  Yet another embodiment is shown in FIGS. In this embodiment, a large number of bent portions 31 are continuously arranged along the tube axis direction of the existing cable protection tube 10.

  As members constituting the connection pipe 30, ninth connection members 49 and eighth connection members 48 are alternately arranged between the pair of first connection members 41, 41 at both ends in the tube axis direction. Ninth connection members 49 are connected to the first connection members 41 at both ends in the tube axis direction.

In this embodiment, as shown in FIG. 16, the first connection member 41 includes a spherical surface 41f on the inner surface of the other end. The configuration of one end side of the first connection member 41 is the same as that of the above-described embodiment.
Further, the configuration of the holding member 20 is a state in which the end surface of the other end side of the taper member 22 is in contact with the end surface of one end of the main body portion 21.

  As shown in FIG. 17, the eighth connection member 48 has a cylindrical shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. Spherical portions 48b are respectively provided at one end and the other end in the cylinder axis direction with the intermediate portion 48a interposed therebetween. The inner surface of the spherical portion 48b is a spherical surface 48c.

  The ninth connecting member 49 has a cylindrical shape as a whole, and similarly, a hole for inserting a cable passes from one end to the other end in the tube axis direction. Spherical portions 49b are respectively provided at one end and the other end in the cylinder axis direction across the intermediate portion 49a. The outer surface of the spherical portion 49 b is a spherical surface 49 c that comes into surface contact with the spherical surface 48 c of the eighth connecting member 48.

  Each of the eighth connection member 48 and the ninth connection member 49 is a pair of half-split pipe members, and is arranged in a cylindrical shape on the outer periphery of the cable C, as shown in FIG. , Bolts, nuts and the like are integrated.

  The first connecting member 41 and the ninth connecting member 49, the eighth connecting member 48 and the ninth connecting member 49 are spherical surfaces 41f and 49c that are in surface contact with each other; the tube axis of the cable protection tube 10 while 48c and 49c are in sliding contact with each other. It bends on one side and the other side along the direction, and functions as a so-called universal joint. The configuration and action of the stretchable part 32 are the same as in the above-described embodiment.

  In each of these embodiments, the bent portion 31 is configured to allow bending of the cable protection tube 10 while the spherical surfaces that are in surface contact with each other are in sliding contact with each other, but the configuration of the bent portion 31 is limited to this embodiment. Instead, a well-known structure that functions as a so-called universal joint that can swing in any direction around the tube axis can be employed.

  Moreover, although the expansion-contraction part 32 was set as the structure which accepts expansion-contraction of the cable protection pipe | tube 10 along a pipe-axis direction, mutually slidingly, as a structure of the expansion-contraction part 32, it is not limited to this embodiment, A so-called expansion joint A well-known configuration that functions as the above can be adopted.

1,11 Repair member for cable protection tube (Repair member)
2,12 Repair sockets 3, 4 Connecting pipe 10 Existing cable protection tube (cable protection tube)
12a Intermediate portion 12b Protruding portion 12c Tapered surface 12d Screw portion 20 Holding member 21 Main body portion 21a Intermediate portion 21b Hole portion 21c Tapered surface 21d Protruding portion 21e Flange 21g Slit 21h Stopping hole 22 Taper members 22a, 22b Tapered surface 30 Connection pipe 31 Bending Part 32 Extendable part 33 Stopper 33a Protrusion 34 Circumferential groove 34a Recess 35 Recess 36 Stopper 41 First connection member 41a Intermediate part 41b Spherical part 41c Spherical surface 41d Screw part 41e Flange 41f Spherical surface 42 Second connection member 42a Intermediate part 42b Spherical part Part 42c Spherical surface 42d Projection part 43 Third connection member 43a Intermediate part 43b Projection part 43d Screw part 43e Flange 44 Fourth connection member 44a Intermediate part 44b Spherical part 44c Spherical surface 44d Projection part 45 Fifth connection member 45a Intermediate part 45b Spherical part 45c Spherical surface 46 Sixth connecting member 46a Intermediate portion 46b Spherical part 46c Spherical surface 46d Projection part 47 Seventh connection member 47a Intermediate part 47d Projection part 48 Eighth connection member 48a Intermediate part 48b Spherical part 48c Spherical part 49 Ninth connection member 49a Intermediate part 49b Spherical part 49c Spherical part

Claims (2)

In order to repair the deteriorated portion of the existing cable protection tube (10) into which the cable is inserted, the deterioration portion is removed, and then the existing cable protection tube (10) on both sides of the removed portion is sandwiched. In the repair member (11) of the cable protection tube connected so as to connect the end portions (10a, 10b),
One end of the repair socket (12) is inserted into the cable protection tube (10) from the end (10a) of the existing cable protection tube (10) on one side across the removed portion, and the repair socket ( 12) The other end of the cable protection tube (10) on the other side can be connected to the other end of the other side through the connecting tube (30), and the other end of the cable protection tube (10) on the other side can be connected to the other end of 12) When the repair socket (12) is about to move out from the existing cable protection tube (10) on the one side between the existing cable protection tube (10) and the repair socket (12). A repair member for a cable protection tube, further comprising a holding member (20) that is pressed by the repair socket (12) to expand its diameter.   The connecting pipe (30) is allowed to bend and stretch along the pipe axis direction and a bent part (31) that allows bending of one side and the other side along the pipe axis direction of the existing cable protection pipe (10). The repair member of the cable protection tube according to claim 1, further comprising: an expanding / contracting portion (32) that performs or any one thereof.

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