JP2006115657A - Cable friction preventing appliance on installing cables - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable friction preventing tool on installing cables capable of stably guiding without damaging a wire body, such as an optical cable even if it is an underground conduit for the optical cable of which the conduit opening is not protruded in a manhole, and attaining a simple structure and easy installation. <P>SOLUTION: This cable friction preventing appliance 1 on installing cables guides the wire body 5 provided at the conduit opening 3 of the underground conduit 2 and laid on the underground conduit 2 so as to be floated from the inner periphery surface 10 of the conduit opening 3. The appliance has a sleeve member 4 made by a sleeve body fitted in the conduit opening 3 and having a slit 8 for inserting the linear body 5 in the conduit opening 3, a roller 6 which guides the linear body 5 inserted in the sleeve member 4 or pulled out of the sleeve member 4 so as to be floated from the inner periphery surface 10 of the sleeve member 4, and a support fixture 7 which retains the roller 6 at the sleeve member 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cable-passing friction preventing device that guides a linear body provided in a pipe opening of an underground pipeline so as to float from an inner peripheral surface of the pipe opening.

  As a method of guiding the optical cable and the tow rope for pulling the optical cable when the optical cable is extended and laid on the underground pipe line extending from the manhole, the optical cable 5b and the tow rope 5a are guided into the manhole 17 as shown in FIG. It is known to provide a pulley 20 for this purpose. The pulley 20 used in this method is connected to the inner wall of the manhole 17 via the wire 21 and is held in a state where it floats at a predetermined position due to the balance between the tension received from the optical cable 5b and the pulling rope 5a and the tension of the wire 21. It has become so.

  There is also a method of providing a passing duct sleeve (not shown) for inserting the optical cable 5b between the cable drum 22 and the underground pipeline 2, and guiding the optical cable 5b with this passing duct sleeve.

  Furthermore, as described in Patent Document 1, a guide roller is attached to a pipe opening of an underground pipe line protruding into a manhole with a screw-type locking jig to guide a large-diameter communication cable. ing.

JP-A-11-252734

  By the way, in the method of guiding the optical cable 5b and the tow rope 5a with the pulley 20, since a plurality of wires 21 must be stretched in a balanced manner, there is a problem that the installation work is not easy, and the optical cable 5b and the tow rope. If the optical cable 5b and the pulling rope 5a are loosened due to the timing of the pulling and feeding out of the 5a, the pulley 20 may lose its balance and cause a positional shift, and the optical cable 5b and the pulling rope 5a are stably guided. There was a problem that it was difficult.

  Further, in the method of guiding the optical cable 5b with the passage duct sleeve, there is a problem that the optical cable 5b is rubbed and damaged when the curve of the passage duct sleeve is steep.

  And in the method of attaching the guide roller to the pipe opening of the underground pipe with a screw type locking jig, the guide roller cannot be attached to the underground pipe for optical cable that does not protrude the pipe opening into the manhole. The guide roller has a problem in that the structure thereof is complicated and the operation of attaching the guide roller to the underground pipe is strict and complicated.

  Therefore, the object of the present invention is to solve the above-mentioned problems, and can guide stably without damaging the striated body of an optical cable or the like even if it is an underground conduit for an optical cable that does not protrude the pipe port into the manhole, and the structure is simple. It is an object of the present invention to provide a cable passing friction prevention device that is easy to install.

  In order to solve the above problems, the present invention provides a cable-passing friction preventing device that guides a linear body provided in a pipe opening of an underground pipe to be floated from an inner peripheral surface of the pipe, A sleeve member having a cylindrical body inserted into the tube opening and having a slit through which the linear body is inserted, and a linear body inserted into or extracted from the sleeve member. It comprises a roller that guides it so that it floats from the inner peripheral surface, and a support that holds the roller on the sleeve member.

  The support includes a fixed arm member and a movable arm member, and the fixed arm member is attached to one side of the sleeve member with the slit as a boundary, and the movable arm member is movable to the fixed arm member above the slit. It is preferable that the roller is mounted and rotatably supported between the distal ends of the fixed arm member and the movable arm member.

  The movable arm member may be attached to the fixed arm member via a fastening screw, and may be moved so as to open a slit of the sleeve member by loosening the fastening screw.

  The roller may be formed in a drum shape according to the curvature of the inner peripheral surface of the sleeve member.

  The roller may be rotatably held by a support shaft provided on the fixed arm member, and an engagement hole that engages with the support shaft may be formed in the movable arm member.

  According to the present invention, even if it is an underground conduit for an optical cable that does not project the pipe opening into the manhole, it can be stably guided without damaging the filaments such as the optical cable, the structure can be simplified, and the installation is easy. Can be.

  1 and 2 are perspective views of the cable passing friction preventing device, and FIG. 2 shows a state in which a tow rope as a striate is inserted through the cable passing friction preventing device. FIG. 3 is a side view of the cable passing friction preventing device fitted in the pipe opening of the underground pipeline.

  As shown in FIGS. 1 and 3, the cable passing friction prevention device 1 includes a sleeve member 4 made of a cylindrical body that is fitted into a pipe port 3 of an underground pipe 2, and is inserted into or removed from the sleeve member 4. A roller 6 that guides the linear member 5 such as an optical cable to be taken out so as to float from the inner peripheral surface of the sleeve member 4, and a support 7 that supports the roller 6 on the sleeve member 4 are configured.

  As shown in FIG. 2, the sleeve member 4 has a slit 8 through which the filament 5 is inserted. The slit 8 is formed so as to penetrate between both ends of the sleeve member 4 in the axial direction, so that the intermediate portion of the linear member 5 can be introduced from the radially outer side or led out radially outward. Yes. The width of the slit 8 is determined so that the outer peripheral shape of the sleeve member 4 can be kept substantially circular and the optical cable to be laid can be passed. By maintaining the outer peripheral shape of the sleeve member 4 in a substantially circular shape, the sleeve member 4 inserted into the underground pipeline 2 can be easily rotated in the underground pipeline 2 and the direction of the roller 6 can be adjusted appropriately. . Further, the end 9 on the roller 6 side of the sleeve member 4 is formed to be thick in the radial direction and is formed by rounding the inner peripheral end, and even if the linear body 5 hits the linear body 5, It is designed not to hurt.

  As shown in FIGS. 2 and 4, the roller 6 is formed in a drum shape in accordance with the curvature of the inner peripheral surface of the sleeve member 4, and guides the filament 5 to the center of the roller 6 with its tension. The linear member 5 is prevented from rubbing against the sleeve member 4 even if it is removed from the center of the roller 6. Further, the roller 6 is held by the support 7 so that the filament 5 to be guided is lifted from the inner peripheral surface 10 of the sleeve member 4.

  As shown in FIGS. 1 and 4, the support 7 is attached to the fixed arm member 11 attached to one side of the sleeve member 4 with the slit 8 as a boundary, and is movably attached to the fixed arm member 11 above the slit 8. The movable arm member 12 is formed. Each of the fixed arm member 11 and the movable arm member 12 is curved in an arc shape at one end side according to the curvature of the outer periphery of the end portion 9 of the sleeve member 4, and has a substantially horseshoe shape by connecting the curved ends. ing. The support 7 is arranged with one end of the curved portion along the outer periphery of the end 9 of the sleeve member 4 and the roller 6 between the fixed arm member 11 and the distal end (the other end) of the movable arm member 12. It is configured to be rotatably supported. Specifically, the roller 6 is rotatably held by a support shaft 13 provided on the fixed arm member 11. The movable arm member 12 is attached to the fixed arm member 11 via a tightening screw 14. By loosening the tightening screw 14, the movable arm member 12 rotates around the tightening screw 14 to open the slit 8 of the sleeve member 4. It is supposed to be. In addition, the movable arm member 12 has an engagement hole 15 that engages with the distal end portion of the support shaft 13 at the distal end, and the distal end portion of the support shaft 13 is inserted into the engagement hole 15 by inserting the distal end portion of the support shaft 13. Has come to support. Further, a hook 16 is provided on one end side of the fixed arm member 11 through which the tightening screw 14 is inserted so as to be hooked at an appropriate position.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 5, when laying an optical cable (not shown) as the filament 5 in the underground pipeline 2 formed between the manholes 17, first, the underground pipe is used by using a line tool (not shown). The tow rope 5a is passed through the road 2, and the cable passing friction preventing device 1 is attached to each pipe port 3 of the underground pipe 2 with the tow rope 5a inserted as shown in FIG. At this time, it arrange | positions so that the roller 6 of the cable passage friction prevention instrument 1 may face the other cable passage friction prevention instrument 1 which adjoins.

  As shown in FIG. 2, the operation of inserting the traction rope 5 a through the cable passing friction preventing device 1 is performed by loosening the tightening screw 14 and rotating the movable arm member 12 around the tightening screw 14 to open the slit 8. Thereafter, the intermediate portion of the pulling rope 5a is introduced into the slit 8 from the outside in the radial direction, and the movable arm member 12 is rotated to close the upper portion of the slit 8 as shown in FIG.

  Thereafter, as shown in FIG. 7, the traction rope 5 a is connected to the optical cable 5 b and is connected to a traction device 18 such as a winch and is pulled by the traction device 18. As a result, the traction rope 5 a is pressed against the rollers 6 of the respective cable passing friction preventing devices 1 and is stretched between the rollers 6 while being floated from the inner peripheral surface of the pipe port 3. Therefore, it is possible to prevent the traction rope 5a and the optical cable 5b following the traction rope 5a from being rubbed against the pipe port 3 of the underground pipeline 2. At this time, since the roller 6 is pushed outward in the radial direction of the sleeve member 4, the cable passing friction prevention device 1 has the edge of the port 3 of the underground pipeline 2 as a fulcrum as shown by the arrow in FIG. A rotating force F is generated. The force F acts to press the insertion side end of the sleeve member 4 against the inner peripheral surface of the underground pipeline 2, and firmly fixes the cable passing friction preventing device 1 to the underground pipeline 2. Even if the pulling rope 5a and the optical cable 5b following the pulling rope 5a are loosened for some reason, the cable passing friction prevention device 1 is mostly inserted into the underground conduit 2, so it does not move and is stable. Thus, the tow rope 5a and the optical cable 5b can be guided.

  Further, when the optical cable 5b is pulled by the tow rope 5a, even if the tow rope 5a or the optical cable 5b swings due to an external force or the like and is detached from the roller 6, the fixed arm member 11 is moved across the slit 8. Is attached to one side of the sleeve member 4, and the fastening screw 14 is close to the slit 8, so that the slit 8 and the roller 6 can be sufficiently separated from each other, and the traction rope 5 a and the optical cable 5 b are slit in the sleeve member 4. 8 Avoid hitting the edges around. Then, the support 7 having a horseshoe shape hits the tow rope 5a or the optical cable 5b removed from the roller 6, guides the tow rope 5a or the optical cable 5b, and quickly returns the tow rope 5a or the optical cable 5b on which the swing is settled onto the roller 6. Acts as follows.

  As described above, the sleeve member 4 is formed of a cylindrical body that is fitted into the tube port 3 and has a slit 8 for inserting the filament 5 into the cylindrical body, and the sleeve member 4 is inserted into or extracted from the sleeve member 4. The cable passage friction preventing device 1 is configured by including the roller 6 that guides the filament 5 so as to float from the inner peripheral surface 10 of the sleeve member 4 and the support 7 that holds the roller 6 on the sleeve member 4. Even if it is an underground conduit 2 for an optical cable that does not project the pipe port 3 into the manhole 17, it can be stably guided without damaging the striate body 5, the structure can be simplified, and it can be easily installed in the manhole 17. can do.

  The support 7 includes a fixed arm member 11 and a movable arm member 12. The fixed arm member 11 is attached to one side of the sleeve member 4 with the slit 8 as a boundary, and the movable arm member 12 is located above the slit 8. Since the roller 6 is rotatably attached to the fixed arm member 11 and supported between the distal ends of the fixed arm member 11 and the movable arm member 12, the slit 8 can be easily moved by moving the position of the movable arm member 12. Can be opened and closed, and the filament 5 can be easily inserted into the sleeve member 4. Then, since the filament 5 is passed through the annular body formed by the support 7 and the roller 6, even if the filament 5 is detached from the roller 6, the filament 5 is removed by the support 7. Can be guided back onto the roller 6.

  In addition, the movable arm member 12 is attached to the fixed arm member 11 via the tightening screw 14 and is movable so as to open the slit 8 of the sleeve member 4 by loosening the tightening screw 14. The movable arm member 12 can be moved with a simple operation, and the slit 8 can be easily opened and closed.

  Since the roller 6 is formed in a drum shape according to the curvature of the inner peripheral surface 10 of the sleeve member 4, the linear member 5 can be guided to the center of the roller 6, and the inner periphery of the sleeve member 4 can be guided. The roller surface 19 can be extended along the inner side of the surface 10 over a wide range, and it is possible to satisfactorily prevent the linear member 5 from hitting the inner peripheral surface 10 of the sleeve member 4.

  Further, the roller 6 is rotatably held by a support shaft 13 provided on the fixed arm member 11, and the movable arm member 12 is formed with an engagement hole 15 that engages with the support shaft 13. By engaging the support shaft 13 with the hole 15, the tip of the support shaft 13 cantilevered by the fixed arm member 11 can be supported, and the roller 6 can be firmly supported with a simple structure.

  In addition, although the optical cable 5b and the pulling rope 5a were illustrated as the linear body 5, it does not restrict to this. The wire 5 may be an inner pipe (not shown) through which the optical cable 5b is inserted in the underground conduit 2, or may be other if it is installed in the underground conduit 2. However, since the inner pipe is installed for each underground pipe 2 and is cut near the pipe port 3 of the underground pipe 2, there is no need to put it in and out of the sleeve member 4 through the slit 8, You may put it in and out of the department. The inner pipe may have a larger diameter than the width of the slit 8.

  Moreover, although the underground pipe line 2 demonstrated the case where it was provided between the manholes 17, the manhole 17 may be a handhole (not shown) and may be another underground space.

  Furthermore, although the case where the filament 5 was bent up and down in the manhole 17 was demonstrated, it does not restrict to this. For example, when the linear body 5 is bent sideways with the manhole 17 as a boundary, for example, the above-described cable passing friction preventing device 1 is useful. Also in this case, the method of using the cable passing friction preventing device 1 is the same as described above. That is, the cable passing friction preventing device 1 may be inserted into the pipe port 3 of the underground pipeline 2 with the roller 6 positioned on the side of the linear member 5 to be bent.

It is a perspective view of a cable passage friction prevention instrument. It is a perspective view of a cable passage friction prevention instrument. It is a side view of the cable passage friction prevention instrument inserted in the pipe port of an underground pipeline. It is a front view of a cable passage friction prevention instrument. It is explanatory drawing which shows the 1st process of routing a tow rope to an underground pipeline. It is explanatory drawing which shows the 2nd process of inserting a cable passage friction prevention instrument in an underground pipe line. It is explanatory drawing which shows the 3rd process of pulling an optical cable with a tow rope. It is explanatory drawing which shows the conventional optical cable installation work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable passing friction prevention instrument 2 Underground pipe line 3 Pipe port 4 Sleeve member 5 Line body 6 Roller 7 Support tool 8 Slit 10 Inner peripheral surface 11 Fixed arm member 12 Movable arm member 13 Support shaft 14 Clamping screw 15 Engagement hole

Claims (5)

  In the cable passing friction prevention device that guides the wire body installed in the pipe of the underground pipe so as to float from the inner peripheral surface of the pipe, the pipe passes through the pipe, A sleeve member having a slit through which the linear member is inserted, and a roller for guiding the linear member inserted into or extracted from the sleeve member so as to float from the inner peripheral surface of the sleeve member; And a cable passing friction preventing device comprising: a support member for holding the roller on the sleeve member.   The support includes a fixed arm member and a movable arm member, and the fixed arm member is attached to one side of the sleeve member with the slit as a boundary, and the movable arm member is movable to the fixed arm member above the slit. The cable passing friction preventing device according to claim 1, wherein the roller passing friction preventing device is attached and rotatably supports the roller between the distal ends of the fixed arm member and the movable arm member.   The cable passing friction preventing device according to claim 2, wherein the movable arm member is attached to the fixed arm member via a tightening screw, and is moved so as to open a slit of the sleeve member by loosening the tightening screw.   The cable passing friction preventing device according to any one of claims 1 to 3, wherein the roller is formed in a drum shape in accordance with a curvature of an inner peripheral surface of the sleeve member. The cable passing friction according to claim 1, wherein the roller is rotatably held by a support shaft provided on the fixed arm member, and the movable arm member is formed with an engagement hole that engages with the support shaft. Prevention instrument.

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