JPH08237847A - Tension member holding metal fitting in cable joint closure - Google Patents

Abstract

PURPOSE: To draw a cable out of a sleeve easily, secure the joint of the tension member of a cable, improve the tenseness and safety and improve assembly workability by a method wherein a tension member insertion part is provided in an arm member and the attaching part of the arm member is firmly fixed to a linking metal fitting in the sleeve. CONSTITUTION: A trunk optical fiber cable is let through a end plate 3 mated with the side surface mating part 2 of a cylindrical sleeve 1 and fixed with a holding metal fitting. Further, the tension member of the cable is connected to a tension member holding metal fitting 5. A plurality of cable insertion holes 20 are formed in the end plate 3. A tension member insertion part which has a through-hole for the insertion of the tension member is provided in the arm member of the tension member holding metal fitting 5 and fixing and tightening screws are provided on the tension member insertion part and, further, an attaching part provided on the arm member is fixed to a linking metal fitting 8 in the sleeve 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closure for protecting a connection portion of a communication cable such as an optical cable, and more particularly to a tension member gripping tool for an optical cable closure.

[0002]

2. Description of the Related Art Generally, a cable connection closure is
An end face plate that penetrates the cables on both sides of the cable connecting part, and a vertically-separated cylindrical sleeve that accommodates the connecting part by covering the connecting part. There is often used a structure in which the divided butted portions opposed to each other are connected and integrated by a fixing means such as a bolt or a band to hermetically protect the cable connecting portion.

Since the sleeve of the housing for protecting the connection portion of the conventional cable must maintain rigidity for preventing deformation of the sleeve and prevent ingress of moisture, the respective components of the sleeve are tightly coupled to each other. Also, the connection between the cable end and the cable end must be tight, the cable housing that holds the cable that is pulled out firmly, and that maintains the tension without preventing the cable from being cumbersome and expensive and costly, There was also a problem in terms of durability, and the management and assembling workability for securing the cable connection became complicated, which was a problem. The present invention is intended to eliminate these conventional drawbacks, simplifies the derivation of the cable from the sleeve, secures the cable tension member connection, enhances the safety with tension, and significantly improves the assembly workability. An object of the present invention is to provide a tension member gripping tool for cable connection which can be improved.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a butt joint surface which surrounds a cable connecting portion and axially divides a cylindrical sleeve into which a cable can be led out so as to face each other. In the closure in which the joint surfaces are integrally connected by a fixing means, a tension member insertion portion having a through hole for inserting the tension member into the sleeve is provided in the arm member, and the tension member insertion portion is provided with a fixing tightening screw. At the same time, the arm member is provided with a mounting portion that is fixed to the connecting fitting in the sleeve.

[0005]

[Operation] Strip the cable jacket to the required length, cut the internal slot rod from the strip, and cut it to the specified size.
Complete the preparation for connecting the cable by making the tension member bare so that the slot member has a predetermined size using a cutter or the like. Grind and clean the outer jacket of the cable at the specified position in the circumferential direction, insert the cable spacer, and then cut and open the thin-walled cap and the slanted slit that will become the cable insertion hole of the end plate, and open the slit end. Insert the cable through the cable insertion hole, attach a sealing member with a groove to the slit, fit a connecting piece to block and hold the slit, and tape to cover the slit on the outer peripheral portion of the end face plate. Glue the gaskets so that they fit together. afterwards,
Attach the cable grips to the cable jacket using the necessary spacers, tighten them with the tightening bolts to the specified torque, and then tighten the tension members with the tightening screws using the tension member grips to the required torque. Then, while pressing the end plate against the lower sleeve, adjust it to the end plate gasket, cover with the upper sleeve, press the sleeves against each other, and tighten the fasteners in order from the center to the outside. Assembled by fastening in separate steps to stabilize and secure the mounting posture of the cable sealing material and the end plate, and also greatly improve the sealing performance, which is safely used as a closure by the gas injected from the valve. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied to a cylindrical sleeve 1 shown in FIGS. 1 to 12 and an end face plate 3 fitted to a side fitting portion 2 of the sleeve 1.
Explaining with an example of a closure provided with and,
In addition, the trunk optical cable is penetrated and fixed by the cable holding metal fitting 4, and the tension member of the cable is connected and connected to the tension member holding metal fitting 5. The sleeve 1 is a cylindrical housing, and both sides of the sleeve 1 can be divided into upper and lower parts with separate joint surfaces along the axial direction.
A butt joint surface which is made of a synthetic resin such as PP resin or flame-retardant FRPP filled with glass fiber, or a styrene-based or olefin-based thermoplastic elastomer, and which is axially divided into two butt joint surfaces, and the sleeve 1.
End plates 3 to be fitted, for example, rubber spacers such as EPDM having excellent characteristics such as weather resistance and ozone resistance, are provided at both ends of the end plate 3, and at least one cable insertion hole 20 is formed in the end plate 3. The cable insertion hole 20 is integrally provided with a thin-walled cap portion 21 capable of covering and separating the hole, and a slit 22 communicating with the cable insertion hole 20 is provided so as to penetrate through the outer surface of the end face plate, and a terminal cut by the slit 22 is provided. Is configured so that it can be expanded. A gasket 7 is provided on the split joint surface of the sleeve 1 including the joint surface facing the end plate 3.
Is provided with a recessed groove 6 capable of fitting and holding, and a cable holding metal fitting 4 formed of a holding and holding piece along the outer circumference of the cable, a tension member holding tool 5, and a tension member connecting tool 9 on the inner surface facing the end face plate 3. The connecting fitting 8 provided is fixedly installed, and further, a buckle 30 for fastening the opposing joint surfaces of the split sleeve is provided, and a band 12 having a fastener 11 made of a screw is detachably wound around the outer circumference of the sleeve 1. The sealability on the separation surface is improved so that the connection can be achieved.

As the tension member gripping tool 5,
The arm member 5 ₃ is provided with a tension member insertion portion 5 ₂ having a through hole 5 ₁ into which the tension member is inserted, and the tension member insertion portion 5 ₂ is provided with a fixing tightening screw 5 ₄ and the arm member 5 ₃ , Connecting fitting 8 in sleeve 1
There is provided a mounting portion 5 ₅ that is fixed to the. (FIG. 9) In this case, the tension member insertion portion 5 ₂ is provided by the arm member 5 ₃ at a position corresponding to each of the plurality of cable insertion holes 20 formed in the end face plates 3 provided at both ends of the sleeve 1. As described above, the tension member insertion portion 5 _{2 in which the} arm member 5 ₃ is formed of a gate-shaped or radial support rod and the support rod is formed with a through hole 5 ₁ parallel to the longitudinal direction of the sleeve.
It is better to have a plurality of.

The band 12 is formed of a strip-shaped metal plate or the like that can be wound around the sleeve 1, hooks are provided at both ends thereof, and the bolt 1 is inserted through engaging pieces engaged with the hooks.
1 is screwed so that the hooks can be connected and disconnected freely, but ribs (not shown) are provided on the outer periphery of the sleeve 1, and the band 12 is wound and mounted in the concave portion between the ribs. It is also considered to be useful for preventing the detachment.

The sleeve 1 is vertically separable, and a sealing material is interposed between the end plates 3 so as to maintain the airtightness of the inside of the closure together with the sleeve gasket 7. The surfaces can be connected and integrated by fixing means. That is, one side in the longitudinal direction of the sleeve is connected by a hinge mechanism such as a fixed hinge or a detachable hinge, and the other side is provided with a buckle 30 that can be tightened or tightened or retightened. The end plate 3 is made of a rubber elastic body such as an oval shape, an elliptical shape, or a circular shape, and has a plurality of cable insertion holes 20 each having a thin wall cap portion 21, and the thin wall cap portion 21 is selectively cut open. And used as a through hole,
A cable insertion hole having a slit 22 inclined to a horizontal surface for easy insertion of a cable is provided, and a concave surface portion 23 for fitting and holding a connecting piece 24 across both sides across the slit 22 is provided. The seal member 25 is applied to the connection member 24 and is fastened by the connection piece 24 so that the cable insertion hole penetrates the inside and outside of the closure. (Figs. 5 to 8)

A spacer (43) made of rubber or the like or an airtight tape is wound around the through hole or the cable lead-out hole formed by the cable insertion holes 20, so that the outer peripheral surface of the cable can be closely attached. Is taken into consideration. In this case, a hollow cylindrical spacer 4 provided around the cable led out from the sleeve 1.
3 is provided with a slit 44 for inserting and inserting a cable on one side of the spacer 43 so that it can be expanded to one side,
A ring-shaped groove 45 is formed on the inner circumference and the outer circumference of the spacer 43.
It is preferable that each of them is provided with 46 to make it easy to ensure airtightness and to simplify the work of assembling and disassembling. (Figure 10)

Since the spacer 43 uses a rubber elastic body in a natural environment, pressure changes between the outer circumference and the sleeve, and between the inner diameter of the cable insertion hole and the outer circumference of the cable so that the spacer 43 can contract and expand in accordance with the environmental temperature. The spacer corresponding to the above and the pressure change are minimized to secure the compressive stress and prevent the low temperature shrinkage. Further, the spacer 43 is slit to facilitate the cable insertion, and the outer peripheral surface and / or the inner peripheral surface has A plurality of ring-shaped ridges are provided so as to project. When cables with different outer diameters are inserted into the cable insertion holes 20 of the end plate 3, the outer diameter is the same as the insertion hole and the inner diameter is the cable outer diameter so that the insertion holes with the same diameter can be used. It is preferable that the cable spacer 43 corresponding to the above is provided with mountain grooves on its inner diameter and outer diameter and is set to the cable to ensure airtightness.

Further, the cable holding metal fittings 4, 4 are attached to both ends of the connecting metal fitting 8 fixed to the sleeve 1 so as to face the inner surface side of the end face plate 3, and the tension members are fixed to the holding metal fitting 5 by fixing screws. Sequential mounting, mounting fittings having a pair of rings 14, 14 in the central portion, for example, storage tray 1
5, the tension member connection tool 9 can be provided so that the core wire can be distributed and guided to be connected.
(Figs. 1 and 12)

The cable grip 4 is shown in FIG.
As shown in FIG. 3, the cable holding portion 17 along the outer periphery of the cable is rotatably provided on the receiving member 16 having the cable insertion concave portion 16 ₁ by the pin 18 to open and close, and the cable is gripped and fixed by the screw 19 so that the cable is gripped. It is made easy. That is, the receiving member 16 integrally provided with a plurality of cable insertion concave portions 16 ₁ , the bending holding piece 17 rotatably pivotingly attached to the receiving member 16 by the hinge mechanism by the pin 18 which can be attached and detached, and the bending holding piece 17. , A mounting screw 19 for attaching and detaching to the receiving member 16
It is configured to be capable of gripping a cable, and a plurality of mountain-shaped protrusions are provided on the inner surface of the receiving member and the inner surface of the curved holding piece so that the cable can be gripped to obtain a gripping force. The curved holding piece 17 may have a detachable structure which is detachably attached to the receiving tool 16.

The cable tension member attached to the tension member gripping tool 5 is of a single-hole type or a multi-hole type, but the attachment member is provided with one to a plurality of tension member insertion portions via an arm and has a sleeve. It is fixed in 1 to hold the cable. For example, a cable tension member gripper 51 provided in the sleeve.
13, a single or a plurality of insertion portions 47 for inserting a cable as shown in FIG. 13 are provided on a mounting plate 49 via radial arms 48, and the insertion portion 47 is provided with a fixing tightening screw 50. It is preferable that the tension member holding metal fitting 5 be attached to facilitate the installation with tension applied to one or a plurality of cable centers. The sleeve 1 or the end face plate 3 is provided with a gas inlet port (not shown) having a valve, and a sealed gas is injected from the gas inlet port to ensure protection of the closure connection portion. There is.

When assembling the connecting portion having such a structure, a spacer 43 is attached to each cable, or a cable sealing material is wrapped around the cable, and the outer jacket of the end portion of the cable is fixed by the cable grip fitting 4, and then the end face plate 3 is formed. The joint surface of the split sleeves 1 and 1 is butted against the joint surface of the sleeve 1 and the joint surface of the sleeve 1 via the gasket 7, and the buckle 30 on the outer circumference of the sleeve is tightened, and the band 12 having the fastener 11 is attached. The fasteners 11 are wound and fixed by tightening the fasteners 11, and the buckles 30 are sequentially provided at predetermined intervals.
By repeatedly attaching and tightening, the airtightness can be firmly maintained over the entire length of the sleeve 1 to form a highly reliable sealing structure. In this assembled state, since the sleeve gasket 7 is compressed in the radial direction between the vertically joined surfaces, it is possible to maintain high airtightness with a comparatively small holding force, and the end face plate 3 and A spacer is interposed between the cable and the cable in the length direction of the cable, and a sealing material is provided, so that the postures of the sleeves 1 and 1 are stable, the assembling is facilitated, and the airtightness can be remarkably improved. This sleeve gasket 7 has a rectangular cross-sectional shape with rounded corners and concave grooves formed on the upper and lower surfaces to provide a lip effect, and is considered to improve the assemblability and airtightness. There is.

On the other hand, when releasing the fastened state of the sleeves 1 and 1, the bolts of the fastener 11 are loosened and the band 1 is released.
2 is removed from the sleeves 1 and 1, the fastening of the buckle 30 is released, the connecting piece 24 for preventing slit opening is removed from the end face plate 3, and the joint surface of the sleeve 1 is separated and divided, so that the cable can be easily replaced. Can be

As shown in FIG. 2, a hinge mechanism for a hooking hinge 27 and an insertion hole 28 is provided on the divided edge portion of the sleeve 1 so as to be detachable, and the hooking hinge 27 is inserted into the insertion hole. The upper and lower sleeves 1 and 1 can be easily fitted together simply by fitting the buckle 30 on the spot after fitting it on the site. That is, the hinge mechanism is
A fixed hinge or a removable hinge which is composed of a plurality of pins and corresponding insertion holes, or which is fixedly or detachably provided by a single rod penetrating the plurality of insertion holes.

As shown in FIGS. 5 to 8, the end face plate 3 has a rubber spacer, which has four cable insertion holes 20 of equal diameter or different diameters, and a slit 22 for each hole.
A cable can be inserted and fitted by opening the end, and the change of the hole diameter of the cable insertion hole 20 and the cable diameter is performed through the end face plate 3. A seam spacer having a mountain groove on both sides made of plastic is inserted in the middle portion of the slit 22, and the diagonal slit 22 has a thin wall on one side and the outer peripheral surface of the end face plate 3 when the cable is not inserted. Since the cap portion 21 of the insertion hole can be cut off at the same time when the cable is inserted, the work can be improved and the airtightness and reliability can be improved. The slit portion 22
When the cable is inserted and used, the connecting piece 24 serving as the opening stopper is provided with the concave surface portion 2 in order to prevent the opening action and the displacement of the cut outer peripheral portion during the step of reclosing after inserting the cable.
It is attached to 3. In addition, the outermost peripheral surface of the end face plate 3 is provided with a plurality of mountain grooves 26 over the entire circumference, and a compression force with the inner surface of the sleeve is obtained to maintain airtightness, and the compression force transmitted to the inside of the cable It is designed to be airtight with. That is, the airtight holding mechanism for the fitting portion 2 of the sleeve 1 and the end face 3 is provided with the groove 26 on the outer periphery of the end face plate 3,
The tightening force of the band is transmitted to the receiving groove 26 by the sleeve 1 so that the airtightness can be maintained, and the end face plate gasket is not required, so that the disassembly workability can be improved.

As shown in FIG. 12, the storage tray 15 for the core wire mounting metal fittings allows mounting of 5 to 20 tapes per tray as a fixing method for each tape, and the storage trays are stacked in multiple stages and hinged. By connecting the parts, the required tray position can be opened and the workability can be improved. In addition,
The sleeve 1 is composed of a pair of semi-cylindrical bodies that are vertically divided into two parts along the longitudinal direction, and are formed in a thicker portion toward the divided joint surface of the sleeve and are concave on the outer joint surface. Although the groove 6 is provided to ensure the maintenance of airtightness, it is also possible to select a cable direct insertion shape in which the end plate 3 is omitted.

In order to closely fix the split joint surfaces of the sleeves 1 and 1, as shown in FIG. 14, one side in the longitudinal direction of the split edge portion of the sleeve is a detachable hinge consisting of a pin catching hinge 27 and an insertion hole. By making it possible to fasten the other side with the rotatable buckle 30, the workability is improved, and the sleeve gasket 7 installed in the sleeve groove 6 on the hinge side closes the sleeve 1 with the hinge as a fulcrum. It is also possible to automatically fit into the concave groove 6 of the upper and lower sleeves 1 and 1 by rotating the upper sleeve 1 and the lower sleeve 1. The hinge mechanism may be fixed to the upper and lower sleeves 1, a pin may be attached to one sleeve in the longitudinal direction, and an insertion hole may be provided opposite to the other sleeve to remove the hinge mechanism.

As the buckle 30, hooks are hooked and the upper and lower sleeves 1 can be operated with a single touch of a handle.
After fastening 1 to a predetermined size, it is preferable to use a retightening mechanism capable of further approaching the size, for example, a device provided with a screw rod and a nut so as to be adjustable.

In the example of FIG. 15, the cylindrical sleeve 1 which covers the circumference of the cable connecting portion and is divided into two in the axial direction is connected and integrated by the fixing means at the joint surfaces facing each other, and the cable is inserted and led out through the spacer. The end plate portion ₁₁ having the fitting insertion recess 52 and the gasket recess groove formed on the split joint surface 54 is integrally provided at both ends of the sleeve 1 so that the end plate and the assembling work thereof are omitted to directly connect the cable. It can be inserted, the airtightness can be easily secured, and the handling is simple. Furthermore, the split sleeves 1 and 1 are connected to one side in the longitudinal direction by a hinge mechanism of a fixed hinge or a detachable hinge 27 and tightened to the other side. A buckle 30 that can be tightened as needed is provided to facilitate the work of assembling and disassembling the sleeve.

[0023]

According to the present invention, a butt joint surface that covers the periphery of a cable connection portion and axially divides a cylindrical sleeve from which a cable can be led out is formed. In a closure integrally connected by a fixing means, a tension member inserting portion having a through hole for inserting a tension member into the sleeve is provided in an arm member, and the tension member inserting portion is provided with a fixing tightening screw and the arm. By providing the member with a mounting part that is fixed to the connecting metal fitting in the sleeve, it is possible to easily secure the cable connection of the sleeve, and it is possible to perform the covering and accommodating work of the cable connection part extremely quickly, and to reduce the number of tightening points. The tension of the tension member is easy, and reliable sealing can be secured, and the cable posture is stable and easy to handle. In, help to facilitate the assembly work,
The cables can be connected and fixed easily and safely, the configuration is simple, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a use state in which an embodiment of the present invention is separated and a part is separated and a notch is shown.

FIG. 2 is an exploded perspective view of a portion of the sleeve of FIG.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a partially cut side view of the example of FIG. 1 in an assembled state.

5 is an enlarged front view of the end plate of the example of FIG.

FIG. 6 is a sectional plan view taken along the line AA of FIG.

7 is a cut side view taken along line BB of FIG.

FIG. 8 is a side view as seen from the outside of FIG.

9 (a) is a front view and FIG. 9 (b) is a plan view of the tension member gripping tool of FIG.

FIG. 10 is an example of a spacer, (a) is a side view,
(B) is a front view and (c) is a vertical cross-sectional view taken along line YY.

FIG. 11 is a front view of the cable grip of the example of FIG. 1 in an operating state.

12 is a side view of the storage tray of the example of FIG. 1, FIG.
(B) is the top view.

13 (a) is a front view and FIG. 13 (b) is a plan view of another embodiment of the cable tension member.

FIG. 14 is a perspective view of a notched sleeve according to another embodiment of the present invention.

FIG. 15 is a perspective view of another embodiment of the sleeve of the present invention in a partially cutaway state.

[Explanation of symbols]

1 Sleeve 2 Side Fitting Part 3 End Face Plate 4 Cable Grip Metal Fitting 5 Tension Member Connection Tool 6 Recessed Groove 7 Sleeve Gasket 8 Connection Metal Fitting 9 Tension Member Grip Metal Fitting 11 Fastener 12 Band 14 Ring 15 Storage Tray 16 Receiver 16 ₁ Cable Insertion concave part 17 Holding piece 18 Pivot 19 Screw 20 Cable insertion hole 21 Thin-walled cap part 22 Slit 23 Concave part 24 Connection piece 25 Seal member 26 Mountain groove 27 Hinge 28 Insert hole 29 Spacer 30 Buckle 31 Bracket 32 Handle 33 Rotating member 34 Screw Rod 35 Pin 36 Nut 37 Hook 38 Pin 43 Spacer 45, 46 Mountain Groove 51 Cable Tension Member Holding Tool

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tadashi Hattori 1-25-17 Himonbunya, Meguro-ku, Tokyo Toto Soken Co., Ltd. (72) Inventor Satoshi Mineshima 1-25-17 Himonya, Meguro-ku, Tokyo Shares Company Totou Soken Co., Ltd. (72) Inventor Koji Yamagiwa 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Koji Okamoto 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (3)

[Claims] 1. A butt joint surface that covers the periphery of a cable connection portion and divides a cylindrical sleeve from which a cable can be drawn into two in the axial direction, and the joint surfaces of the divided sleeves that face each other are connected by a fixing means. In the integrated closure, a tension member insertion part having a through hole for inserting a tension member into the sleeve is provided in the arm member, the tension member insertion part is provided with a fixing tightening screw, and the arm member is provided with a sleeve. A tension member gripping tool for a cable connecting closure, which is provided with an attachment portion that is fixed to a connecting metal fitting inside. 2. The tension member gripping tool according to claim 1, wherein the tension member insertion portion is provided by an arm member at a position corresponding to each of a plurality of cable insertion holes formed in end plates provided at both ends of the sleeve. . 3. The arm member according to claim 1 or 2, further comprising a plurality of tension member insertion portions each having a portal or radial support rod, and the support rod having a through hole parallel to a longitudinal direction of the sleeve. Tension member gripping tool.