JP2005102481A - Protection jig for branch line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protection jig for a branch line by which the improvement of workability can be realized, by preventing the entanglement of the branch lines each other and the improvement of quality can be realized, by avoiding the degradation of transmission characteristics and the disconnection by preventing the bending of the branch line. <P>SOLUTION: The protection jig 10 for a branch line is assembled to a communication cable aggregate 11, which has a trunk line 13 composed by aggregating a plurality of communication cables 12 and the branch line 15, branched from the trunk line 13 at a prescribed branch part 14 of the trunk line 13. At least a part of the branch line 15 is held and surrounded by a curvature radius larger than an allowable curvature radius of the branch line 15 so as to be extractable in a prescribed direction with the protection jig 10 for a branch line. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a branch line protection jig from a communication cable assembly, and more specifically, communication capable of integrating and branching (ie, branching) a plurality of communication cables such as electric cables, optical cables, and the like. The present invention relates to a branch line protection jig used to protect a branch line branched from a cable assembly.

A communication cable assembly in which a plurality of communication cables can be integrated and made into a branch is used for internal wiring of a building having a plurality of layers such as a building, a condominium, a factory, and the like. In particular, a communication cable assembly having a structure in which a necessary number of communication cables are directly wound around a support line, or a communication cable assembly having a structure in which a required number of communication cables are mounted around a support line using a spacer (for example, Non-Patent Document 1) is generally known. An example of such a communication cable assembly will be described with reference to FIG. 13, FIG. 14, FIG. 15, and FIG.
Furukawa Electric Co., Ltd., [online], [searched July 28, 2003], Internet <URL: http://www.furukawa.co.jp/tukuru/pdf/optsogo/optsogo_1_06.pdf>

  In the communication cable assembly 50 shown in FIGS. 13, 14, 15, and 16, tape is put in the five slots 53 of the first layer spacer 52 arranged around the tension member (ie, the support wire) 51. The core wires 54 are respectively accommodated, and the press core tape 55 is wound around the outer periphery of the first layer spacer 52, whereby each tape core wire 54 is fixed. Then, the second layer spacer 56 is integrally formed on the outer periphery of the presser winding tape 55. Tape core wires 58 are accommodated in the slots 57 of the second layer spacer 56, respectively, and the press core tape 59 is wound around the outer periphery of the second layer spacer 56 to fix each tape core wire 58. Further, the sheath 60 is integrally formed on the outer periphery of the holding tape 59.

  For example, as shown in FIGS. 13 and 14, the communication cable assembly 50 is cut from an integrated state to a required length, and unnecessary portions are removed and discarded, and the required length is obtained. The cut single tape cores 54 and 58 are taken out from the spacers 52 and 56 at a desired length, are branched, the root is fixed by the tape 61 or the like, and the connector 62 is attached to the terminal. This is done by attaching. Then, after manufacturing, the communication cable assembly 50 is temporarily fixed to the sheath 60 with an adhesive tape or the like along the branched single tape cores 54 and 58 on the sheath 60 along the upper side in FIG. The whole is shipped in a circular bundle. The communication cable assembly 50 is used by suspending a cable grip 63 provided at an upper end portion thereof from a ceiling of a building or the like.

  However, in the communication cable assembly 50, when the single tape cores 54 and 58 branched and temporarily fixed on the sheath 60 are removed, the tape cores 54 and the tape cores 58 are easily entangled. When the tape core wire 54 and the tape core wire 58 are entangled, workability is significantly reduced. Such entanglement becomes more prominent as the length of the branched single tape cores 54 and 58 becomes longer. Further, if the entangled tape core wire 54 or the tape core wire 58 is bent, the transmission characteristics may be deteriorated and the wire may be disconnected. Therefore, as shown in FIG. 16, the branched single tape cores 54, 58 may be arranged on the sheath 60 along the lower part in FIG. 16. 58 must be folded back, and when folded into a bundle at the time of manufacture or when laid on a building or the like, the folded portions of the tape core wires 54 and 58 are easily broken, thereby avoiding deterioration of transmission characteristics and disconnection. difficult.

  The present invention has been made in view of the above-described circumstances, and its purpose is to prevent entanglement between the branch lines, thereby improving workability and preventing the branch lines from being bent. Accordingly, it is an object of the present invention to provide a branch line protection jig capable of improving quality by avoiding deterioration of transmission characteristics and disconnection.

  In order to achieve the above-described object, the branch line protective jig according to the present invention is characterized by the following (1) to (13).

(1) A branch line protection jig assembled to a communication cable assembly having a trunk line in which a plurality of communication cables are assembled and a branch line branched from the trunk line at a predetermined branch portion of the trunk line. ,
Holding at least a part of the branch line with a curvature radius larger than an allowable curvature radius of the branch line, or holding at least a part of the branch line larger than an allowable curvature radius of the branch line It can be held in a bent state, surrounded and drawn out in a predetermined direction.
(2) In the branch line protection jig according to (1), the branch line protection jig includes a cylindrical protection jig body surrounding a part of the branch line,
A plurality of branch line holding portions for holding a part of the branch line with a curvature radius larger than the allowable curvature radius of the branch line is disposed on the inner surface of the protective jig body. .
(3) In the branch line protection jig according to (2), the branch line holding portion holds the branch line while maintaining a radius of curvature larger than an allowable curvature radius of the branch line. And a second holding part for holding the branch line part leading to the first holding part and the branch line part drawn from the first holding part.
(4) In the branch wire protective jig of (2) or (3), the protective jig body can be unfolded and assembled integrally.
(5) In the branch wire protective jig according to any one of the above (2) to (4), the branch wire protective jig includes an extension portion whose inner diameter can be changed according to the diameter of the trunk line. Have it protruding from the protective jig body.
(6) In the branch wire protective jig of (5), the extension portion has an opening that can draw the branch wire and draw it.
(7) In the branch wire protective jig according to (5) or (6), the extension portion has a positioning portion for positioning with respect to the trunk line.
(8) In the branch line protective jig according to any one of (5) to (7), at least one of the extension part and the protective jig body is fixed to the trunk line including the branch line. about.
(9) In the branch line protection jig according to (1), the branch line protection jig includes a jig main body having an arcuate cross section that comes into contact with a side surface of the trunk line, and one end is an axis of the jig main body. A fixing sheet that is fixed to one side end portion formed in parallel to the jig main body and the other end is provided with an adhesive layer;
The branch line is arranged along the outer peripheral surface of the jig body in a state where the branch line is curved with a curvature radius larger than the allowable curvature radius of the branch line, and the fixing sheet includes the branch line and the jig body. And winding the jig body together with the branch line and fixing the jig body to the trunk line.
(10) In the branch wire protective jig according to (9), the outer peripheral surface of the jig body accommodates the branch line with a curvature radius larger than an allowable curvature radius of the branch line. A section is provided.
(11) In the branch wire protection jig according to (9) or (10), the fixing sheet fixes the branch line to the jig body in a state where the branch line is housed in the branch line housing portion. When,
A jig fixing sheet that is wrapped around the main body of the jig, the branch line being housed and fixed in the branch line housing portion, and the main line, and fixing the branch line protection jig to the main line;
Having provided.
(12) In the branch wire protective jig according to (10) or (11), the branch line housing portion has a radius of curvature larger than an allowable curvature radius of the branch line and is provided on an outer peripheral surface of the jig body. It is a formed branch line accommodation groove.
(13) In the branch line protection jig according to any one of the above (10) to (12), the branch line protection jig is temporarily fixed in a state where the branch line portion is housed in the branch line housing portion. Provided with temporary fixing tape.

  Here, as the communication cable assembly, a trunk line formed by bundling a large number of communication cables and winding a tape or the like on the outside thereof can be exemplified. Then, for example, a single communication cable is taken out at a predetermined branch portion of the communication cable assembly and branched to form a branch line.

According to the branch line protection jig having the configuration of (1) above, at least a part of the branch line drawn from the predetermined branch portion of the trunk line is made from the allowable curvature radius of the branch line by the branch line protection jig. Is held in a curved state with a large radius of curvature, or is held and surrounded and drawn in a predetermined direction, so that the branch line drawn from the branch portion of the main line is not bent and is pulled out with a large radius of curvature. It is. Therefore, the entanglement between the branch lines is prevented and the workability is improved, and the branch lines are prevented from being bent, so that the deterioration of the transmission characteristics and the disconnection can be avoided to improve the quality. As a result, when bundled at the time of manufacturing or when laying on an object to be laid, such as a building, problems such as entangled or bent branch lines, reduced transmission characteristics, or broken wires are eliminated. it can.
Further, according to the branch line protection jig having the configuration of (2), a part of the branch line is surrounded by the protection jig body, and the plurality of branch line holding portions arranged in the protection jig body. Because a part of the branch line is held in a curved state with a radius of curvature larger than the allowable curvature radius of the branch line, it is possible to surely avoid deterioration of transmission characteristics and disconnection, and a large radius of curvature part of the branch line. However, it does not come into contact with other branch lines, and entanglement is reliably prevented.
Further, according to the branch line protection jig having the configuration of (3), the portion of the branch line branched from the predetermined branch portion of the trunk line has a radius of curvature larger than the allowable curvature radius of the branch line. Both end portions of the portion that is held by one holding portion and has a large curvature radius are held together by the second holding portion. Therefore, a part of the branch line is reliably held with a radius of curvature larger than the allowable curvature radius of the branch line and is not bent.
Further, according to the branch line protection jig having the configuration of (4) above, the protection jig body is left in an unfolded state, and the branch line is branched from a predetermined branch portion of the trunk line, and the branch line is made large. Since the protective jig body can be assembled after holding at the radius of curvature, workability is good, and the branch line protection jig can be assembled to the branch line without requiring any skill. it can.
Further, according to the branch wire protective jig having the configuration of (5) above, the extension jig is changed according to the diameter of the main line, and then the protective jig main body is assembled to the main line, It is possible to protect the trunk line protruding outward from the cable. At this time, if the extension portion is tapered, for example, friction with other branch lines is further reduced by this extension portion, so that the prevention of entanglement can be further ensured.
Further, according to the branch line protection jig having the configuration of (6), the branch line can be smoothly drawn into and pulled out of the protection jig body through the opening. Can do.
Further, according to the branch line protection jig having the configuration of (7), when the branch line protection jig is assembled to the main line, the branch line protection jig is assembled to the main line after the positioning portion is aligned with the main line. Can do. Therefore, since alignment with respect to the main line is easily performed, workability is good, and the branch line protection jig can be assembled to the main line without requiring any skill.
Moreover, according to the branch wire protective jig having the configuration of (8), the extension portion and / or the protective jig body is fixed to the trunk line including the branch line. Thereby, since the protective jig main body and / or the extension part and the branch line can be integrally fixed to the trunk line, when laying on a construction target such as a building at the time of shipment after being bundled, The integrated communication cable assembly can be handled while preventing entanglement with other communication cable assemblies.
Further, according to the branch wire protective jig having the configuration of (9), the jig main body having an arc cross section that contacts the side surface of the trunk line, one end is fixed to one side end of the jig main body, and the like. And a fixed sheet provided with an adhesive layer at the end, arranged along the outer peripheral surface of the jig body in a state where the branch line is curved with a curvature radius larger than the allowable curvature radius, and the branch line is formed by the fixed sheet. Is wrapped around the main wire together with the jig body and fixed. As a result, entanglement between the branch lines is prevented, workability is improved, and bending of the branch lines is surely prevented, and deterioration in transmission characteristics and disconnection can be avoided to improve quality.
Further, according to the branch line protective jig having the configuration of (10), the outer peripheral surface of the jig body accommodates the branch line with a branch line being curved with a radius of curvature larger than the allowable curvature radius of the branch line. Is provided. Thereby, the branch line can be curved with a radius of curvature larger than the allowable radius of curvature simply by a simple operation of accommodating the branch line in the branch line accommodating portion. Therefore, the workability is good and the branch line can be assembled to the branch line protection jig with a radius of curvature larger than the allowable radius of curvature without requiring any skill.
Further, according to the branch line protection jig having the configuration of (11), since the branch line fixing sheet and the jig fixing sheet are provided, the branch line accommodated in the branch line accommodating portion is separated from the branch line. The jig main body is fixed to the jig main body with the fixing sheet, and the jig main body including the branch line is wound around the trunk line with the jig fixing sheet, so that it can be reliably and easily fixed.
Further, according to the branch line protective jig having the configuration of (12), the branch line accommodation portion is a branch line accommodation groove formed on the outer peripheral surface of the jig body, and therefore the branch line is used as the branch line accommodation groove. The branch line can be surely curved with a radius of curvature larger than the allowable radius of curvature by a simple operation of inserting into the cable.
In addition, according to the branch line protective jig having the configuration of (13), since the branch line portion is provided with the temporary fixing tape that temporarily fixes the branch line portion in a state of being accommodated in the branch line accommodating portion, the curved branch line portion is provided. Is prevented from detaching from the branch line accommodating portion, and the subsequent work is facilitated.

  According to the present invention, it is possible to prevent entanglement between branch lines, thereby improving workability and preventing bending of the branch lines, thereby avoiding deterioration of transmission characteristics and disconnection of quality. Improvements can be made.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a plan view showing a first embodiment of a branch line protection jig according to the present invention, FIG. 2 is a plan view of the branch line protection jig shown in FIG. 1 in a developed state, and FIG. 4 is an external perspective view of the branch line protection jig shown in FIG. 1 when deployed, FIG. 4 is an external perspective view of the first stage when the branch line protection jig shown in FIG. 1 is assembled to a trunk line, and FIG. FIG. 6 is an external perspective view of the second stage when assembled to the trunk line in the branch line protection jig shown in FIG. 6, and FIG. 6 is an external perspective view of the third stage when assembled to the trunk line in the branch line protection jig shown in FIG. FIG. 7 is an external perspective view of the final stage when the branch line protection jig shown in FIG. 1 is assembled to the trunk line.

  As shown in FIG. 1, the branch line protection jig 10 according to the first embodiment of the present invention has a trunk line 13 in which a plurality of communication cables 12 are assembled, and a trunk line is formed at a predetermined branch portion 14 of the trunk line 13. 13 is assembled to a communication cable assembly 11 having a branch line 15 branched from 13, and at least a part of the branch line 15 is held with a radius of curvature larger than an allowable radius of curvature of the branch line 15 and surrounded to be predetermined. It can be pulled out in the direction. The communication cable assembly 11 is used for a telephone line, for example.

  The communication cable assembly 11 includes a support line 16 in the center, and a plurality of communication cables 12 are assembled around the support line 16 so as to have a circular outer periphery, thereby forming a trunk line 13. The support wire 16 has a high tensile strength, and is formed by, for example, twisting a plurality of galvanized steel wires and coating a coating of a polymer material such as polyethylene on the outer periphery thereof. The communication cable 12 is wound in the longitudinal direction of the trunk line 13 by a spiral, SZ twist, etc. that reverses at a constant cycle. A branch line 15 made of a single communication cable 12 is drawn out at a predetermined position of the main line 13, and the branch line 14 is formed by tape-wrapping the branch line 15 and the main line 13.

  The branch line protection jig 10 is formed of a polymer material such as plastic, specifically, polyethylene, PET, or the like, and is mainly a semi-cylinder that can be unfolded and assembled integrally. A protective jig main body 17 formed in a cylindrical shape (tubular shape) by a semi-cylindrical second main body portion 19 (see FIG. 2) as well as the first main body portion 18 and the longitudinal direction of the trunk line 13 It comprises taper-shaped extensions 20, 21, 22, and 23 (see FIG. 2) projecting from both ends of the protective jig body 17.

  The protective jig body 17 surrounds the branch line 15 branched from the branch part 14, holds the branch line 15 with a curvature radius larger than the allowable curvature radius of the branch line 15 inside, and then turns back to the branch part 14 side. Pull out.

  The tapered extensions 20, 21, 22, and 23 are formed in a tapered shape that tapers from the end of the protective jig body 17 along the longitudinal direction of the trunk line 13. Of the tapered extensions 20, 21, 22, 23, the tapered extension 21 on the branching portion 14 side of the first main body 18 is connected to the tapered extension 21 from the end of the first main body 18. An opening 24 having a predetermined width is formed between the leading ends. The opening 24 includes a root portion 15A of the branch line 15 drawn into the protective jig main body 17 from the branch portion 14, and a connection side portion 15C drawn from the protective jig main body 17 and connected to a connector (not shown). , Is used to pass through. Thereby, the drawing of the branch line 15 into the protective jig main body 17 and the pulling out from the protective jig main body 17 through the opening 24 can be performed smoothly and reliably.

  The tapered extensions 20, 21, 22, and 23 are covered by the trunk line 13 after the inner diameter of the portion is changed by cutting the tapered tip portion according to the outer diameter of the trunk line 13, Fixing portions 25 and 26 by tape winding or the like are formed at the tapered tip portion and fixed to the main line 13. Thereby, since the protection jig main body 17, the taper-like extension parts 20, 21, 22, 23, and the branch line 15 can be fixed integrally to the main line 13, it is possible to ship a bundle, When laying the cable, the integrated communication cable assembly 11 can be handled while preventing entanglement with other communication cable assemblies. Further, the taper-shaped extensions 20, 21, 22, 23 are changed by cutting or the like according to the diameter of the main line 13, and then the protective jig main body 17 is assembled to the main line 13, so that the protective jig main body 17 The trunk line 13 protruding outward can also be protected. At this time, since the taper-shaped extensions 20, 21, 22, and 23 are formed in a tapered shape, friction with other branch lines is further reduced, so that prevention of entanglement can be ensured. .

  As shown in FIG. 2, the first main body portion 18 and the second main body portion 19 of the protective jig main body 17 are connected via a hinge portion 27. Therefore, by rotating the first main body 18 with respect to the second main body 19 via the hinge 27 from this developed state, the first main body 18 and the second main body 19 are integrated into a cylindrical shape. Assembled into a shape. At this time, a locking projection 28 is formed on the anti-hinge portion 27 side of the first body portion 18, and a locking projection receiving portion corresponding to the locking projection 28 is formed on the anti-hinge portion 17 side of the second body portion 19. Since 29 is formed, the first main body 18 and the second main body 19 are assembled in a snap action manner. The protective jig body 17 covers the branch line 15 branched from the branch part 14 of the trunk line 13 with the first body part 18 and the second body part 19 in an unfolded state. Since the protective jig main body 17 can be assembled after being held with a radius of curvature larger than the allowable curvature radius, the workability is good, and no skill is required. 10 can be assembled to the branch line 15.

  A branch line holding portion 30 including seven first holding portions 31 and one second holding portion 32 is formed on the inner surface of the first main body portion 18. The first holding portions 31 are arranged at equal intervals on the circumference of a predetermined radius from the center of the first main body portion 18, that is, a curvature radius larger than the allowable curvature radius of the branch line 15. Each of the first holding portions 31 is formed in a pair of hook shapes (shown in FIG. 3), and the width of the hook-shaped tip portion is 5 to 30% smaller than the outer diameter of the single branch line 15. In addition, the inner diameter on the inner surface side is slightly larger than the outer diameter of the single branch line 15. The second holding portion 32 is disposed on the center line of the seven first holding portions 31 and in the vicinity of the opening 24 of the tapered extension portion 21. The second holding portion 32 is formed in a pair of hook shapes (shown in FIG. 3), and the width of the hook-shaped tip portion is 5 to 30% smaller than the combined outer diameter of the two branch lines 15. In addition, the inner diameter is slightly larger than the sum of the outer diameters of the two branch lines 15. When the communication cable 12 is, for example, an optical fiber, it is desirable that the allowable radius of curvature of the branch line 15 is 10 times or more the outer diameter of the single branch line 15.

  In the branch line holding part 30, after the root part 15A of the branch line 15 branched and drawn out by the branch part 14 is pressed and inserted into the second holding part 32, the intermediate part 15B of the branch line 15 has seven pieces. The first holding portion 31 is sequentially pressed and inserted. Then, the connection side portion 15C of the branch line 15 is pressed and inserted into the second holding portion 32 together with the root portion 15A. Thereby, in the branch line 15, the intermediate portion 15B between the root portion 15A and the connection side portion 15C is held by the first holding portions 31 arranged at equal intervals on the circumference having a predetermined radius. Therefore, the base portion 15 </ b> A and the connection side portion 15 </ b> C are held by the second holding portion 32 while being bent and bent with a radius of curvature larger than the allowable curvature radius of the branch line 15. At this time, the width of the hook-shaped tip of the first holding part 31 is 5 to 30% smaller than the outer diameter of the single branch line 15 and the inner diameter on the inner surface side is the single branch line 15. Therefore, the intermediate portion 15B of the branch line 15 does not come out of the first holding portion 31 and is allowed to move in the circumferential direction. In addition, the width of the hook-shaped tip of the second holding portion 32 is 5 to 30% smaller than the total outer diameter of the two branch lines 15, and the inner diameter on the inner surface side is two branch lines. 15 is slightly larger than the sum of the outer diameters of 15, so that the root portion 15 </ b> A and the connection side portion 15 </ b> C of the branch line 15 do not come out of the first holding portion 31, and the direction of the opening 24 and the first holding portion 31. Movement in the direction is allowed.

  In the branch line holding part 30, the intermediate part 15B of the branch line 15 surrounded by the protective jig body 17 is held by the first holding part 31 with a radius of curvature larger than the allowable curvature radius of the branch line 15, so that transmission in the branch line 15 is performed. The deterioration of the characteristic and the disconnection are surely avoided, and the intermediate portion 15B having a large radius of curvature of the branch line 15 is not in contact with the other branch line, so that the entanglement is reliably prevented. Of the branch line 15 branched from the branch part 14 of the trunk line 13, the intermediate part 15 </ b> B is held by the first holding part 31, and the root part 15 </ b> A and the connection side part 15 </ b> C are held together by the second holding part 32. Therefore, the branch line 15 is securely held at a curvature radius larger than the allowable curvature radius of the branch line 15 and is accommodated in the protective jig body 17 without being bent.

  Of the tapered extensions 20, 21, 22, 23, the positioning portions 33, 34, 35 cut out in a concave shape are provided at the distal ends of the tapered extensions 20, 22, 23, in which the opening 24 is not provided. Is formed. The positioning portions 33, 34, and 35 are used to align with the trunk line 13 when the branch line protection jig 10 is assembled to the trunk line 13. Therefore, the branch line protection jig 10 can be assembled to the trunk line 13 at a predetermined position. And since alignment with respect to the trunk line 13 is performed easily, workability | operativity is favorable and the branch line protection jig | tool 10 can be assembled | attached to the trunk line 13 without requiring any skill.

  Next, the procedure for assembling the branch line protection jig 10 to the trunk line 13 will be described with reference to FIGS.

  First, as shown in FIG. 3, the 1st main-body part 18 and the 2nd main-body part 19 are made into an unfolded state. At this time, the tapered tip portions of the tapered extensions 20, 21, 22, 23 are not cut.

  As shown in FIG. 4, in the first stage of the assembling work, the communication cable assembly 11 having the branch line 15 branched from the branch part 14 of the trunk line 13 is carried in, and the trunk line 13 is connected to the tapered extensions 22 and 23. After being positioned by the positioning portions 34 and 35, the distal end portions of the tapered extensions 22 and 23 are cut in accordance with the outer diameter of the trunk line 13, and the cutting portions 22A and 23A having inner diameters matched to the outer diameter of the trunk line 13 are cut. Is formed and prepared. At this time, the tip end portions of the tapered extensions 20 and 21 are cut in the same manner to form the cut portions 20A and 21A having an inner diameter corresponding to the outer diameter of the trunk line 13. The branch line 15 simply extends from the branch portion 14.

  As shown in FIG. 5, in the second stage of the assembling work, the trunk line 13 is inserted into the second main body portion 19, and the branch line 15 is first connected through the opening 24 in the first main body portion 18 in the unfolded state. It is drawn into the main body 18. Then, after the root portion 15A of the branch line 15 is pressed and inserted into the second holding portion 32, the intermediate portion 15B of the branch line 15 is sequentially pressed and inserted into the seven first holding portions 31 to connect the branch line 15. The side portion 15C is pressed and inserted into the second holding portion 32 together with the root portion 15A. The remaining portion of the connection side portion 15 </ b> C is pulled out to the outside of the first main body portion 18 through the opening 24. At this time, since the cut portions 22A and 23A of the tapered extensions 22 and 23 are cut with an inner diameter matching the outer diameter of the main line 13, the second main body 32 is reliably combined with the main line 13. It is.

  As shown in FIG. 6, in the third stage of the assembling work, the first main body 31 that holds the branch line 15 with a curvature radius larger than the allowable curvature radius of the branch line 15 is rotated via the hinge part 27. And assembled to the second main body 32. The assembly of the first main body 18 and the second main body 19 is reliably performed in a snap action by the locking projection 28 of the first main body 18 and the locking projection receiver 29 of the second main body 19. At this time, in the first main body portion 18, the cut portions 20 </ b> A and 21 </ b> A obtained by cutting the tapered extension portions 20 and 21 are also combined with the main line 13. Even when the first main body 18 and the second main body 19 are integrally assembled and the unfolded state is closed, the remaining portion of the connection-side portion 15C remains outside the first main body 18 through the opening 24. Has been drawn to.

  As shown in FIG. 7, in the fourth stage of the assembling operation, cut portions 20 </ b> A, 21 </ b> A, 21 </ b> A, 21 </ b> A, 21 </ b> A, 21 </ b> A of the tapered extensions 20, 21, 22, 23 cut to the outer diameter of the main line 13 and assembled to the main line 13. 22A, 23A, the remaining portion of the connection side portion 15C of the branch line 15 drawn through the opening 24, and the cut portions 20A, 21A, 22A of the tapered extensions 20, 21, 22, 23 on the trunk line 13. Fixing portions 25 and 26 by tape winding or the like are formed on the portion protruding from 23A, and the assembly of the branch line protection jig 10 to the trunk line 13 is completed.

  According to the branch line protection jig 10 described above, the intermediate portion 15B of the branch line 15 drawn from the predetermined branch portion 14 of the trunk line 13 has a large curvature radius, that is, a curvature larger than the allowable curvature radius of the branch line 15. It is held and surrounded by a radius, and is drawn out in the direction of a predetermined branching portion 14. Therefore, the branch line 15 drawn from the branch part 14 of the trunk line 13 is not bent and is drawn with being held with a radius of curvature larger than the allowable curvature radius of the branch line 15. As a result, entanglement between the branch lines 15 is prevented and workability is improved, and bending of the branch lines 15 is prevented, so that deterioration of transmission characteristics and disconnection can be avoided and quality can be improved.

  Further, according to the branch line protection jig 10, a part of the branch line 15 is surrounded by the protection jig body 17, and the branch line 15 is provided by the branch line holding part 30 disposed in the protection jig body 17. Since the intermediate portion 15B of the branch line 15 is held with a radius of curvature larger than the allowable curvature radius of the branch line 15, the deterioration of the transmission characteristics and the disconnection are surely avoided, and the curvature larger than the allowable curvature radius of the branch line 15 of the branch line 15 The intermediate portion 15B having a radius does not come into contact with other branch lines, and entanglement is reliably prevented.

  Further, according to the branch line protection jig 10, among the branch lines 15 branched from the predetermined branch portion 14 of the trunk line 13, seven intermediate portions 15 </ b> B having a curvature radius larger than the allowable curvature radius of the branch line 15 are provided. The first holding part 31 holds the base part 15A and the connection side part 15C at both ends of the intermediate part 15B together with the second holding part 32. Therefore, a part of the branch line 15 is securely held at a curvature radius larger than the allowable curvature radius of the branch line 15 and is not bent.

  Further, according to the branch line protection jig 10, the protection jig main body 17 is in an unfolded state, and the branch line 15 is branched from the predetermined branch portion 14 of the trunk line 13, and the branch line 15 is connected to the branch line 15. Since the protective jig main body 17 can be assembled after being held at a radius of curvature larger than the allowable curvature radius of 15, the workability is good and no protection is required for any branch line. The tool 10 can be assembled to the branch line 15.

  In addition, according to the branch line protection jig 10, the tapered extension portions 20, 21, 22, and 23 are cut (changed) according to the diameter of the trunk line 13, and then the protection jig main body 17 is attached to the trunk line 13. As a result, the trunk line 13 protruding outward from the protective jig body 17 can also be protected. Since the taper-shaped extensions 20, 21, 22, and 23 are tapered, the friction with other branch lines is further reduced, and the prevention of entanglement can be further ensured.

  Further, according to the branch line protection jig 10, the branch line 15 can be drawn into the protection jig main body 17 and pulled out from the protection jig main body 17 through the opening 14 smoothly and reliably. .

  Further, according to the branch line protection jig 10, when the branch line protection jig 10 is assembled to the main line 13, the positioning parts 33, 34, and 35 are aligned with the main line 13 and then the branch line protection jig 10 is connected to the main line. Therefore, the alignment with respect to the trunk line 13 is easily performed, the workability is good, and the branch line protection jig 10 can be assembled to the trunk line 13 without requiring any skill. .

  Further, according to the branch line protection jig 10, the tapered extensions 20, 21, 22, and 23 and the protection jig body 17 are fixed to the trunk line 13 by the fixing parts 25 and 26 including the branch line 15. Therefore, the protective jig body 17, the tapered extensions 20, 21, 22, 23, and the branch line 15 can be integrally fixed to the main line 13, so that it can be used for shipping after being bundled, for buildings, etc. When laying, the integrated communication cable assembly can be handled while preventing entanglement with other communication cable assemblies.

(Second Embodiment)
Next, a branch line protection jig according to a second embodiment of the present invention will be described with reference to FIGS.

  8 is an external perspective view of the branch line protection jig of the second embodiment, FIG. 9 is an external perspective view of the branch line protection jig shown in FIG. 8 viewed from the back side, and FIG. 10 is a circle X in FIG. 11 is an enlarged perspective view of a portion surrounded by a circle, FIG. 11 shows a state in the middle of assembling of the branch line protection jig, and the branch line accommodated in the branch line accommodation groove is for the branch line temporarily fixed by the temporary fixing tape. FIG. 12 is a perspective view of the protective jig, and FIG. 12 is an external perspective view showing a state where an outer diameter adjusting tape is wound around a thin trunk line and a branch line protective jig is attached.

  As shown in FIGS. 8 to 10, the branch line protection jig 100 of the second embodiment includes a jig body 101 and a fixing sheet 103. The jig main body 101 is made of a polymer material such as plastic, specifically, polyethylene, polyurethane, various rubbers, etc. as a raw material, and is molded into a substantially semicircular shape. That is, the jig body 101 has a circular arc cross section and has flexibility. The curvature radius R1 of the outer peripheral surface 101a of the jig body 101 is larger than the allowable curvature radius of the branch line 15. Further, both end portions 101b and 101c in the circumferential direction are formed in a tapered shape. This is for facilitating winding of the fixed sheet 103 as will be described later.

  On the outer surface 101a of the jig body 101, a branch line housing groove 101d, which is a branch line housing portion for housing the branch line 15, is formed in a substantially inverted U shape. The curvature radius R2 of the branch line accommodation groove 101d is larger than the allowable curvature radius of the branch line 15. In addition, the width and depth of the branch line accommodation groove 101d are slightly larger than the outer diameter of the single branch line 15, and the branch line 15 can be easily accommodated in the branch line accommodation groove 101d.

  One end of a temporary fixing tape 105 for temporarily fixing the branch line 15 accommodated in the branch line accommodating groove 101d is fixed to the jig main body 101 in the vicinity of the inlet side and the outlet side of the branch line accommodating groove 101d. The other end of the temporary fixing tape 105 is provided with an adhesive layer 105a coated with an adhesive 107 on the inner surface when the branch line 15 is temporarily fixed.

  The fixing sheet 103 includes a branch line fixing sheet 109 and a jig fixing sheet 111, and one end of each of the fixing sheets 109 and 111 is fixed to one end 101 b of the jig main body 101. The other ends of both the fixing sheets 109 and 111 are adhesive layers 109a and 111a in which an adhesive 107 is applied to the inner surface when the both fixing sheets 109 and 111 are wound around the branch line protection jig 100 and the trunk line 13, respectively. Is provided.

  The length of the branch line fixing sheet 109 is substantially the same as that of the outer peripheral surface 101a of the jig body 101, and is long enough to cover the entire branch line 15 accommodated in the branch line accommodation groove 101d. Further, the length of the jig fixing sheet 111 is such that the branch line protection jig 100 abutting on the side surface of the main line 13 can be wound together with the main line 13 a plurality of times to facilitate handling. Because of this, it is rolled up.

  The branch line fixing sheet 109, the jig fixing sheet 111, and the temporary fixing tape 103 are thin sheets formed of a synthetic resin such as vinyl chloride or polyethylene, and are flexible enough to be wound around the trunk line 13 or the like. have.

  Since the communication cable assembly 11 is the same as that described in the first embodiment, the same portions are denoted by the same reference numerals and description thereof is omitted.

  Next, assembly of the branch line protection jig 100 to the trunk line 13 will be described with reference to FIG.

  The intermediate portion 15B of the branch line 15 branched from the predetermined position 14 of the trunk line 13 is sequentially pressed and accommodated in the branch line accommodation groove 101d from the inlet side to the outlet side of the branch line accommodation groove 101d. Then, by adhering the adhesive layer 105a of the temporary fixing tape 105 to the outer peripheral surface 101a of the jig body 101, both ends of the intermediate portion 15B of the branch line 15, in other words, the inlet side and the outlet side of the branch line accommodation groove 101d. The intermediate portion 15B located at is temporarily fixed to the jig body 101.

  As a result, the branch line 15 is accommodated in the branch line accommodation groove 101d while being curved with a radius of curvature larger than the allowable curvature radius of the branch line 15, and the branch line 15 is dropped from the branch line accommodation groove 101d. Is prevented, and the subsequent work becomes easy. Since the curvature radius R1 of the outer peripheral surface 101a of the jig body 101 and the curvature radius R2 of the branch line receiving groove 101d are both larger than the allowable curvature radius of the branch line 15, the curvature of the curved branch line 15 is reduced. The curvature radius is larger than the allowable curvature radius in any direction.

  Then, the branch line fixing sheet 109 is placed on the outer peripheral surface 101 a of the jig body 101 to cover the branch line accommodation groove 101 d together with the branch line 15, and the adhesive layer 109 a is bonded to the jig body 101. In this state, the branch line 15 is not fixed to the jig body 101 and is simply held.

  Next, the inner surface side of the jig main body 101 is disposed in contact with an appropriate position of the main line 13, and the jig fixing sheet 111 wound in a roll shape is expanded several times on the jig main body 101 and the main line 13. After winding, the branch line protection jig 100 is fixed to the trunk line 13 by adhering to the outer surface of the jig fixing sheet 111 around which the adhesive layer 111a is wound. Further, the root portion 15A and the connection side portion 15C of the branch line 15 may be further fixed to the trunk line 13 by winding an adhesive tape (not shown) or the like as necessary.

  Since the jig body 101 has moderate elasticity, it protects the branch line 15 from external force. Further, when the jig main body 101 is wound around the trunk line 13, the trunk line 13 is not damaged. Furthermore, even when the outer diameter of the main line 13 and the inner diameter of the jig main body 101 do not coincide with each other, the jig main body 101 can be easily bent and deformed, and can be brought into close contact with the main line 13.

  As shown in FIG. 12, since a plurality of branch lines 15 sequentially branch from the main line 13, the outer diameter of the main line 13 becomes thinner as it goes upward, and the jig body 101 is wound around the thinner main line 13. There may not be. Further, even when the jig body 101 is wound, the radius of curvature R1 of the outer peripheral surface 101a of the jig body 101 becomes smaller than the allowable curvature radius of the branch line 15, and there is a possibility that the branch line 15 is damaged. After the outer diameter adjusting tape 113 is appropriately wound around the outer diameter to adjust the outer diameter, the branch line protection jig 100 is fixed to the outer diameter adjusting tape 113 in the same manner as described above. Accordingly, the branch line protection jig 100 can be appropriately attached to the thin trunk line 13, in other words, the branch line 15 can be bent with a radius of curvature larger than the allowable radius of curvature.

  The outer diameter adjusting tape 113 is a sheet-like member having the same width as or larger than the jig main body 101 and made of the same material as the jig main body 101, and adhesive is applied to one side thereof. An adhesive layer (not shown) is provided and can be wound around the main line 13 and fixed. The thickness of the outer diameter adjusting tape 113 is preferably 1 mm to 10 mm, and more preferably 3 mm to 5 mm, for ease of outer diameter adjustment.

  The branch line protection jig 100 can be easily removed from the trunk line 13 by peeling the fixing sheet 103 as necessary after the communication cable assembly 11 is laid in a target building such as a building.

  According to the branch line protection jig 100 described above, the jig main body 101 having an arc cross section that contacts the side surface of the trunk line 13, one end is fixed to one side end portion 101 b of the jig main body 101, and the other end is adhesive. A fixed sheet 103 (109, 111) provided with layers 109a, 111a, and along the outer peripheral surface 101a of the jig body 101 in a state where the branch line 15 is curved with a radius of curvature larger than the allowable radius of curvature. The branch line 15 is wound around the trunk line 13 together with the jig body 101 by the fixing sheet 103 and fixed. As a result, entanglement between the branch lines 15 is prevented and workability is improved, and bending of the branch lines 15 is prevented, so that deterioration of transmission characteristics and disconnection can be avoided and quality can be improved.

  Further, according to the branch line protection jig 100, the outer peripheral surface 101 a of the jig body 101 has a branch line accommodation portion 101 d that accommodates the branch line 15 with a curvature radius larger than the allowable curvature radius of the branch line 15. Is provided. Accordingly, the branch line 15 can be bent with a radius of curvature larger than the allowable radius of curvature simply by a simple operation of accommodating the branch line 15 in the branch line accommodating portion 101d. Therefore, workability is good and the branch line 15 can be assembled to the branch line protection jig 100 with a radius of curvature larger than the allowable radius of curvature without requiring any skill.

  Furthermore, since the branch line protection jig 100 includes the branch line fixing sheet 109 and the jig fixing sheet 111, the branch line 15 accommodated in the branch line accommodating portion 101d is connected to the branch line fixing sheet. 109, the jig body 101 including the branch line 15 is wound around the trunk line 13 by the jig fixing sheet 111, and can be reliably and easily fixed.

  Furthermore, according to the branch line protection jig 100, the branch line accommodation portion 101d is the branch line accommodation groove 101d formed on the outer peripheral surface 101a of the jig body 101. The branch line 15 can be reliably bent with a radius of curvature larger than the allowable radius of curvature by a simple operation of inserting it into 101d.

  Moreover, according to the branch line protection jig 100, the temporary fixing tape 105 for temporarily fixing the branch line portion in the state where the branch line portion is accommodated in the branch line accommodating portion 101d is provided, so that the curved branch line portion accommodates the branch line. The separation from the part 101d is prevented, and the work becomes easy.

  Other effects can be easily inferred from the effects of the branch line protection jig 10 of the first embodiment already described with reference to FIGS.

The branch line protection jig of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, the shape of the protective jig body is not limited to a cylindrical shape, and may be a polygonal cylindrical shape that can be easily formed.

  Further, the shape of the extension portion is not limited to a tapered shape, and may be integrally assembled to the end portion of the protective jig body as a rubber grommet shape. Of course, also in that case, it is desirable to cut | disconnect a front-end | tip part according to the outer diameter of a trunk line. Further, if a ductile rubber material is used, cutting can be omitted.

  Further, the branch line accommodating portion is not limited to the branch line accommodating groove, and any branch line accommodating portion can be used as long as the branch line can be held with a curvature radius larger than the allowable curvature radius of the branch line. There may be. For example, it may be an arc-shaped step formed on the outer peripheral surface of the jig body, and the branch line may be curved along the arc-shaped step. As a result, the branch line is curved with a radius of curvature larger than the allowable radius of curvature.

  The number of communication cables is not limited because it can be changed and set as appropriate according to various orders.

  Further, the communication cable is not limited to an electric cable, and may be an optical cable.

It is a top view which shows 1st Embodiment of the protection jig for branch lines which concerns on this invention. It is a top view in the unfolded state of the branch line protection jig shown in FIG. It is an external appearance perspective view at the time of expansion | deployment of the branch line protection jig single-piece | unit shown in FIG. FIG. 2 is an external perspective view of a first stage when the branch line protection jig shown in FIG. 1 is assembled to a trunk line. It is an external appearance perspective view of the 2nd step at the time of the assembly | attachment to the trunk line in the branch line protection jig shown in FIG. FIG. 3 is a third external perspective view of the branch line protection jig shown in FIG. 1 when assembled to a trunk line. FIG. 2 is an external perspective view of the final stage when the branch line protection jig shown in FIG. 1 is assembled to a trunk line. It is an external appearance perspective view which shows 2nd Embodiment of the protection jig for branch lines which concerns on this invention. It is the external appearance perspective view seen from the back surface side of the branch line protection jig shown in FIG. FIG. 10 is an enlarged perspective view of a portion surrounded by a circle X in FIG. 9. It is a perspective view of a branch line protection jig in which a branch line accommodated in a branch line accommodation groove is temporarily fixed by a temporary fixing tape and attached to a trunk line. It is an external appearance perspective view which shows the state by which the outer diameter adjustment tape was wound around the thin trunk line, and the branch line protective jig was attached. It is sectional drawing of the conventional communication cable aggregate | assembly. It is a general view which shows an example of the communication cable aggregate | assembly after a process. It is a front view which shows the branch part of the communication cable aggregate | assembly of FIG. It is a general view which shows the modification of the communication cable aggregate | assembly of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Protection jig for branch lines 11 Communication cable assembly 12 Communication cable 13 Trunk line 14 Branch part 15 Branch line 17 Protection jig main body 20 Tapered extension part (extension part)
21 Tapered extension (extension)
22 Tapered extension (extension)
23 Tapered extension (extension)
24 Opening 30 Branching line holding part 31 First holding part 32 Second holding part 33 Positioning part 34 Positioning part 35 Positioning part 100 Branch line protection jig 101 Jig body 101a Jig body outer peripheral surface 101b Jig body One side end 101d Branching line accommodation groove (branch line accommodation part)
103 Fixing sheet 105 Temporary fixing tape 109 Branch line fixing sheet 109a Adhesive layer 111 Jig fixing sheet 111a Adhesive layer

Claims (13)

A branch line protection jig assembled to a communication cable assembly having a trunk line in which a plurality of communication cables are assembled, and a branch line branched from the trunk line at a predetermined branch portion of the trunk line,
Holding at least a part of the branch line with a curvature radius larger than an allowable curvature radius of the branch line, or holding at least a part of the branch line larger than an allowable curvature radius of the branch line A branch line protective jig characterized in that it can be held in a bent state, surrounded, and pulled out in a predetermined direction. The branch line protection jig comprises a cylindrical protection jig body surrounding a part of the branch line,
A plurality of branch line holding portions for holding a part of the branch line with a curvature radius larger than the allowable curvature radius of the branch line is disposed on the inner surface of the protective jig body. The protective jig for branch lines according to claim 1 characterized by these.   The branch line holding section maintains a radius of curvature larger than an allowable curvature radius of the branch line and holds the branch line, a branch line portion toward the first holding section, and the first The branch line protection jig according to claim 2, further comprising a second holding part for holding the branch line part drawn out from the one holding part.   4. The branch line protection jig according to claim 2, wherein the protection jig main body is expandable and can be integrally assembled.   5. The branching wire protection jig has an extension part that can change an inner diameter corresponding to the diameter of the trunk line so as to protrude from the protection jig body. 6. The branch wire protective jig described in one item.   6. The branch line protective jig according to claim 5, wherein the extension part has an opening part into which the branch line can be drawn and pulled out.   The branch wire protective jig according to claim 5 or 6, wherein the extension portion has a positioning portion for positioning with respect to the trunk line.   8. The branch line protection according to claim 5, wherein at least one of the extension part and the protection jig main body is fixed to the trunk line including the branch line. 9. jig. The branch line protective jig is a jig main body having an arcuate cross section that contacts the side surface of the main line, and one end is formed on one side end portion formed on the jig main body in parallel with the axis of the jig main body. A fixed sheet provided with an adhesive layer at the other end, and
The branch line is arranged along the outer peripheral surface of the jig body in a state where the branch line is curved with a curvature radius larger than the allowable curvature radius of the branch line, and the fixing sheet includes the branch line and the jig body. The branch wire protection jig according to claim 1, wherein the jig main body is fixed to the trunk line together with the branch line by being wound around the trunk line.   10. The branch line accommodating portion for accommodating the outer periphery of the jig main body by bending and accommodating the branch line with a radius of curvature larger than an allowable curvature radius of the branch line. Branch line protection jig. The fixing sheet is a branch line fixing sheet that fixes the branch line to the jig main body in a state in which the branch line is stored in the branch line storage part,
A jig fixing sheet that is wrapped around the main body of the jig, the branch line being housed and fixed in the branch line housing portion, and the main line, and fixing the branch line protection jig to the main line;
The branch line protection jig according to claim 9 or 10, characterized by comprising:   The said branch line accommodation part is a branch line accommodation groove | channel formed in the outer peripheral surface of the said jig | tool main body which has a curvature radius larger than the allowable curvature radius of the said branch line. 11 is a branch wire protective jig.   The said branch line protection jig was equipped with the temporary fixing tape which temporarily fixes in the state which accommodated the said branch line part in the said branch line accommodating part, The any one of Claims 10-12 characterized by the above-mentioned. Branch line protective jig described in 1.

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