JP2004212897A - Cabinet for optical cable connection and optical cable holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily connect or switch an optical cable or perform branch connecting operation and re-storing operation, to tightly holding optical cables having different diameters, and to easily handle many cables at narrow intervals without exerting any adverse influence on transmission characteristics of an optical cable. <P>SOLUTION: This holder has an optical cable holding main body 4<SB>1</SB>which has recessed grooves 5 and 6, wherein an optical cable is pressed to a width smaller than the external diameter of the optical cable and held, on both sides in a through state while communicating them with each other and a lid body 4<SB>2</SB>which covers opening part sides of the recessed grooves 5 and 6 of the cable holding main body 4<SB>1</SB>. The holder 4 is constituted to hold a cable having a different external diameter by continuously providing a wide-width recessed groove 5 with a wide groove width and a narrow-width recessed groove 6 with a narrow groove width divisionally on a front side and a rear side of optical cable optical cable along the length of the recessed grooves forming the optical cable holding part. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication cable, particularly an optical fiber cable (hereinafter referred to as an optical cable) having an optical fiber core wire, a connection point at a fixed wiring section, a connection point of an optical cable drawn indoors from outside, and an aerial cable. In the optical cable connection cabinet used for connecting optical cables such as optical cables and underground cables and branch optical fiber cables, the optical cables can be handled easily and easily, and the optical cable connections and the extra length of the cable are protected. The present invention relates to an optical cable gripper in an optical cable connection cabinet that is used safely.
[0002]
[Prior art]
Conventionally, when branching, drawing in, or connecting an optical cable, the cable cores are connected to each other in the optical cable connection cabinet, and an optical cable gripping portion is provided in the optical cable lead-in / out section. There is a demand for easily holding an optical cable at a narrow interval.
In order to easily hold the optical cable, it is known that a groove is formed in the cable introduction portion and the cable is pushed into the groove to hold it. As this type of optical cable holding portion, , By forming protrusions alternately on the opposite wall surfaces in the groove and holding the cable by meandering, pressing the elastic piece against the cable pushed into the groove, or pressing the clamp into the groove and holding it Means such as doing things are used. [See Japanese Patent Application No. 9-127852]
[0003]
[Problems to be solved by the invention]
However, in this type of optical cable gripper, the structure for gripping the cable by meandering in the groove makes it difficult to obtain a sufficient gripping force unless the number of meanders is increased. There is a problem that loss increases easily. In addition, the structure in which the elastic piece is pressed against the cable in the groove and gripped, or the holding member is pushed in to hold the elastic piece or the holding member is not pressed firmly. There is a problem that it is difficult to obtain and the cable is easily pulled out.
The present invention has been made in view of these conventional circumstances, and can easily carry out connection and switching of optical cables or branch connection work and re-storing work without adversely affecting the transmission characteristics of the optical cable. In addition to storing and organizing the cables, it is easy to increase or decrease for each core wire, and it is easy to increase the number of cables. The cable can be safely stored in an extremely compact manner, and the cable is pushed into the concave groove of the optical cable gripping part and gripped. It is an object of the present invention to provide an optical cable gripping tool in an easy-to-handle optical cable connecting cabinet that can grip a cable firmly and that can easily grip a large number of cables at a narrow interval in an inexpensive form. Is.
[0004]
[Means for Solving the Problems]
An optical cable gripping tool according to the present invention includes: an optical cable gripping main body provided in a state where the optical cable is press-fitted with a width smaller than the outer diameter of the optical cable and a concave groove for gripping the cable is communicated; An optical cable gripping tool having a lid that covers the opening side of the concave groove, wherein the optical cable introduction front side and the rear side are divided in the longitudinal direction of the concave groove forming the optical cable gripping portion, and the wide width of the groove is wide. A concave groove and a narrow concave groove having a narrow groove width are continuously provided so that cables having different outer diameters can be gripped.
[0005]
In this way, when a cable with a different outer diameter is gripped by continuously providing a wide groove with a wide groove width and a narrow groove with a narrow groove width on the optical cable introduction side and the optical cable lead side, a sufficiently large grip Force can be obtained, and the resistance force in the pulling direction can be greatly increased to hold the optical cable safely.
[0006]
The concave groove forming the optical cable gripping portion of the present invention has a plurality of protrusions protruding in the groove depth direction on the inner wall surface of the groove, and is set to have a width smaller than the outer diameter of the cable. The optical cable should be sandwiched by applying frictional resistance to the press-fitted cable at a plurality of locations.
In this way, cables with different outer diameters can be securely gripped, a high-density gripping form can be maintained over a long period of time, and safety can be improved.
[0007]
Further, the optical cable gripping tool according to the present invention is configured such that when the concave groove forming the gripping portion is stripped of a cable step having a large cable outer diameter and press-fitted into a wide concave groove having a wide groove width, By configuring so that the exit position at the stepped portion is within the groove wall interval of the narrow groove, it is possible to equalize the gripping force of each cable, and increase the loss of the optical cable fiber and handle it hatefully Can do.
[0008]
Furthermore, in the optical cable gripping tool according to the present invention, a large number of the concave grooves of the optical cable gripping portion are arranged in parallel at predetermined intervals on the upper surface portion of the cable gripping main body, and the outer side of the bottom surface portion of the cable gripping main body. A locking piece projecting in a different direction is provided, and the locking piece is engaged with and disengaged from a mounting hole formed in the base plate fixed in the cabinet body, and the locking portion is hidden behind the base plate. By mounting it slidably, a large number of optical cables can be easily grasped at a narrow interval, and the optical cables are not easily pulled out and can be securely held in the cabinet body.
[0009]
In the optical cable gripping tool of the present invention, it is preferable that the cable gripping main body is provided with an elastic positioning piece that engages and disengages with a positioning hole formed in a base plate fixed in the cabinet main body. In addition, no loosening phenomenon occurs and no stress is applied to the core wire, so that the transmission characteristics of the core wire are not adversely affected.
In the optical cable gripping tool of the present invention, the lid that covers the opening side of the concave groove of the optical cable gripping body is a cover case that opens the outer end of the concave groove forming the cable gripping portion, With the structure to prevent the cable from popping out, which has a locking uneven part on the joint surface with the main body, it is possible to reliably prevent a drop in the gripping force of the cable without causing any trouble due to the cable dropping off. .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of an optical cable connecting cabinet body 1 provided with the optical cable gripping tool of the present invention.
In FIG. 1, an optical cable A is introduced into the cabinet body 1, and a plurality of batch core wire storage trays 2 and individual core wire storage trays 3 that can store the branched core wires a are internally arranged. The core wire storage trays 2 and 3 lead out and insert the optical fiber core wires, store the connecting portions connecting the core wires, and wind and store the extra length of the core wires. The derived optical cable A is press-fitted into the optical cable gripper 4 and gripped.
As shown in FIGS. 2 to 5, the optical cable gripping tool 4 is provided in a state where the optical cable is press-fitted with a width smaller than the outer diameter of the optical cable A and the concave grooves 5 and 6 for gripping the cable communicate with each other in a penetrating state on both sides. and the optical cable gripping body 4 _1, and a cover 4 ₂ covering the opening side of the optical cable gripping body 4 ₁ of the groove 5 and 6, the longitudinal direction of the groove forming the optical cable gripping portion In addition, a wide concave groove 5 having a wide groove width and a narrow concave groove 6 having a narrow groove width are provided continuously on the front side and the rear side of the optical cable introduction so that cables having different outer diameters can be gripped. Thus, it is used for gripping a floor cable gripping tool, for example, a floor cable, a drop cable or a termination cable.
In this case, for example, the holding portion of the optical cable continuously includes a wide groove 5 that accommodates the outer cover without peeling off and a narrow groove 6 that accommodates the optical fiber core wire exposed by peeling the outer cover of the optical cable. Thus, a large number of grooves for gripping the optical cable are arranged in the portion where the optical cable is introduced.
[0011]
The groove 5 and 6 for forming the optical cable gripping portion 4 is projected the projections 5 _1, 6 ₁ in groove depth direction on the inner wall surface of the groove, further optical cable convex Article 5 _1, 6 ₁ A plurality of protrusions are provided at intervals in the front-rear direction of introduction, and set to have a width smaller than the outer diameter of the cable, and friction resistance is applied to the cables press-fitted into the concave grooves 5 and 6 at a plurality of locations. If the optical cable is sandwiched, a sufficiently large gripping force can be obtained, the resistance force in the pulling direction can be greatly increased, the optical cable can be securely gripped, and a high-density gripping form can be maintained over a long period of time, improving safety. .
Further, a wide concave groove 5 having a wide groove width and a narrow concave groove 6 having a narrow groove width are continuously provided in the central portion between the front side and the rear side of the optical cable introduction along the width direction. It is good.
[0012]
Further, the concave grooves 5 and 6 forming the grip portion are the stepped portions of the exposed optical fiber core wire when the cable step having a large cable outer diameter is stripped and pressed into the wide concave groove 5 having a wide groove width. Since the exit position of the cable is within the groove wall interval of the narrow groove 6, the gripping force of each cable can be equalized, and the loss of the optical cable fiber is increased, which can be handled with difficulty. Even if the optical cable is pulled, it is difficult to pull out.
[0013]
Furthermore, the concave groove 5 and 6 of the optical cable gripping portion on the upper surface of the cable grip body 4 ₁ is parallel deployed number at predetermined intervals by the protruding wall 5 _2, 6 ₂ of a predetermined width, and the bottom surface of the cable grip body 4 ₁ Locking pieces 7 and 8 projecting in different directions on the outside of the part are provided, and the locking pieces 7 and 8 are configured to be engaged and disengaged with mounting holes 11 formed in the base plate 10 fixed in the cabinet body 1. At the same time, the locking part is hidden in the back of the base plate 10 and is slidably mounted so that a large number of optical cables can be easily gripped at narrow intervals, and the optical cables are not easily pulled out and securely held in the cabinet body 1. it can.
[0014]
The cabinet body 1 includes a core wire storage tray 3 for storing an optical cable A such as a drop cable drawn indoors from outside or a small optical cable routed indoors without peeling off the outer cover of the optical cable, and an outside of the optical cable. An optical fiber core wire stripped and exposed and a core wire storage tray 2 for storing the connection portion are disposed on both sides. The plurality of core wire storage trays 2 and 3 are connected to the optical cable A connection portion. A cable gripper 14 that is introduced and fixed in the cabinet body 1 in a state of being connected and wired and holds the cable or tension member of the optical cable A, and a floor cable gripper 4. The grippers 4 and 14 are arranged on a cable routing hole or a cable grommet 9 in the routing hole that is parallel to the cabinet body 1 at equal intervals. In, it is to simplify the clamping of the optical cable A deployed on the base plate 10 detachably by the engaging piece or a screw fastening.
[0015]
As the cable grip body 4 _1, its although the groove 5 and 6 of the optical cable gripping portion by the protruding wall 5 _2, 6 ₂ of a predetermined width on the top surface are parallel deployed number at predetermined intervals, the cable grip body 4 ₁ is provided with locking pieces 7 and 8 projecting in different directions on the outer side of the bottom surface of ₁ , and the locking pieces 7 and 8 are engaged with and disengaged from mounting holes 11 formed in the base plate 10 fixed in the cabinet body 1. In addition to the configuration, it is preferable that the locking portions 7 and 8 are slidably mounted in the back surface of the base plate 10.
Further, the cable gripping body 4 _1, the base plate as well as deploy the resilient positioning member 13 which engages and disengages the positioning holes 12 formed in the 10, the lid member 4 ₂ covering the opening side of the groove 5 and 6 was configured to open the outer end of the groove 5, 6, prevention structure popping cables comprise engaging uneven portion 15 of the disengageably at the interface between the lid body 4 ₂ and the optical cable gripping body 4 ₁ It has become.
[0016]
In the core wire storage trays 2 and 3, the upper and lower layer trays are connected to each other by hinge portions so as to be freely opened and closed, and the connecting portion and the extra length of the core wire are individually bundled for each single core branched from the core wire a. It is configured as a collective core wire storage tray that can be stored, and the core wire storage trays 2 and 3 are attached to a base plate 10 provided in the cabinet body 1 through a pull-out tray or other attachment. In this case, a single core wire branched from the core wire or a plurality of core wire storage trays capable of storing the connection portion and the extra length of the core wire for each of the core wires at once or individually, and the collective core wire storage tray 2 And a plurality of blocks of the individual core wire storage trays 3 are detachably fixed to the base plate 10 via the pull-out trays, and the hinge portions of the core wire storage trays 2 and 3 face each other. The cabinet main body 1 is separated from the left and right through a central passage for introducing an optical cable, and a cable gripping tool 14 is disposed on the central passage to store the lead-through line and the branch line.
[0017]
Note that the optical cable gripping body 4 ₁ and the cover 4 ₂ covering the opening side of the optical cable gripping body 4 ₁ of the groove 5 and 6, are respectively integrally molded from a synthetic resin flame-retardant molding In addition, the four-core batch storage tray 2 and the individual core-line storage tray 3 are both formed from a core-sheet tray of a molded product that is integrally formed of synthetic resin, and includes a locking member. For example, it is preferable to provide a latching concavo-convex portion and attach it to the base plate 10 so as to be detachable and to be installed inside the cabinet body 1 to form a core wire connection storage case, that is, the hinge of each core wire storage tray 2, 3. The parts 4 may be arranged in parallel with the central passage in the cabinet body 1 facing each other. For example, the case where the four cores are separated from each other or the connection portion converted to a single core using the separated cores and the extra length are accommodated are used, but the individual cord storage tray 3 has the same configuration.
[0018]
Although only one optical cable A is shown in FIG. 1, a large number of optical cables A are introduced and used in the cabinet body 1 in practice. Further, although the example in which the core wire storage trays 2 and 3 are arranged in parallel is shown, instead of arranging the batch core wire storage tray 2 or the individual core wire storage trays 3 in parallel, the core wire storage trays 2 or 3 are arranged. It is possible to adopt a configuration other than this, in which the core cord storage trays 2 or the individual core cord storage trays 3 are arranged side by side, and the cable introduction portion has a recessed groove into which the cable is pushed. If the cable gripping tool 4 having 5 and 6 and the other cable gripping tool 14 are provided, the clamp fixing of the optical cable A can be simplified and effectively used.
[0019]
The cabinet body 1 is formed by injection molding of synthetic resin or the like, and includes a cover 20 or a lid case that can be opened and closed or removed, and has a wiring hole for introducing the optical cable A. The cable wiring hole or wiring Dust-proof cable grommets 9 are fitted into the cable holes so that the optical cables can be led out and fixed by the cable grippers 4, 14. Adapters and the like are installed in the core wire storage trays 2 and 3.
[0020]
In the optical cable connector storage cabinet according to this embodiment, when connecting the branch optical cable and the optical cable A, the cabinet body 1 is fixed to the outer wall surface of the building with a screw or the like. Pass the cable through the routing hole, and put the extra length of each optical fiber cable through the cable storage trays 2 and 3, and when handling the cable holding cable, hold it in the cable holding sheet or other parts. do it.
Then, the cabinet body 1 is covered with the cover 20 of the lid case to maintain the closed state. However, the wiring processing work such as the extension of the optical cable A and the switching and replacement can be easily performed from the cable sheath stripping portion of the core handling. In addition, it is possible to remarkably easily identify the wiring form at a glance.
[0021]
The optical cable gripping tool in this embodiment is formed as shown in FIGS. 2 to 5, and is provided with a wide groove 5 and a narrow groove 6 in the longitudinal direction of the groove into which the cable is pushed, it on the inner wall surface of the groove are the protruding provided grooved depth direction, and covered by a cover member 4 ₂ covering the opening side of the optical cable gripping body 4 ₁ of the groove 5, 6 grooves The cable press-fitted into the cable is pressed down to prevent the cable from popping out, so that cables having different outer diameters can be securely gripped.
[0022]
In another embodiment of the present invention shown in FIG. 6, a plurality of core wire storage trays 3 stacked on one side of the cabinet body 1 are incorporated into a cover 20 or a lid case that can be opened and closed or removed. A key member 16 having a receiving bracket 17 is provided. A cable grommet 9 is fitted into a cable routing hole, and optical cables are led out and fixed by cable grippers 4 and 14, respectively. The cabinet main body 1 is configured.
[0023]
【The invention's effect】
The present invention relates to an optical cable gripping main body provided with an optical cable press-fitted with a width smaller than the outer diameter of the optical cable to communicate a concave groove for gripping the cable in a penetrating state on both sides, and an opening for the concave groove of the optical cable gripping main body In the optical cable gripper having a lid covering the part side, a wide concave groove having a wide groove width divided into an optical cable introduction front side and a rear side in the longitudinal direction of the concave groove forming the optical cable gripping part, and a groove Narrow grooves with narrow widths are continuously provided so that cables with different outer diameters can be gripped, making it easy to press-fit cables with different outer diameters by securely gripping the cables so that they do not pull out. It can be handled and a sufficiently large gripping force can be obtained, and the resistance force in the pulling direction can be greatly increased to hold the optical cable safely.
[0024]
Further, the optical cable gripping portion of the present invention is a cable in which a plurality of ridges project in the groove depth direction on the inner wall surface of the groove so as to have a width smaller than the outer diameter of the cable, and is press-fitted into the groove. Since the optical cable is sandwiched by applying frictional resistance to multiple locations, it is possible to securely hold cables with different outer diameters, maintain a high-density gripping form over a long period of time, and improve safety. Optical cable connection or branch connection work or re-storing work can be easily performed without adversely affecting the transmission characteristics, and the number of cores can be easily increased or decreased in addition to the storage and organization of each core. The cable can be safely stored in a very compact size, and the cable is pushed into the concave groove of the optical cable gripping part and gripped. It is, the number of cables at narrow intervals, the optical cable gripping member in handling simple optical cable connecting cabinets that can be easily grasped can be provided an inexpensive form.
[0025]
The optical cable gripping portion of the present invention has a plurality of protrusions protruding in the groove depth direction on the inner wall surface of the groove and set to have a width smaller than the outer diameter of the cable, and a plurality of cables are press-fitted into the groove. It is better to pinch the optical cable by applying frictional resistance at some points. In this way, cables with different outer diameters can be securely gripped, a high-density gripping form can be maintained over a long period of time, and safety can be improved.
[0026]
Further, in the optical cable gripping tool according to the present invention, when the concave groove forming the gripping portion is stripped of the cable step having a large cable outer diameter and press-fitted into the wide concave groove having a wide groove width, By configuring so that the exit position at the stepped portion is within the groove wall interval of the narrow groove, it is possible to equalize the gripping force of each cable, and increase the loss of the optical cable fiber and handle it hatefully Can do.
[0027]
Furthermore, in the optical cable gripping tool according to the present invention, a large number of the concave grooves of the optical cable gripping portion are arranged in parallel at predetermined intervals on the upper surface portion of the cable gripping main body, and the outer side of the bottom surface portion of the cable gripping main body. A locking piece projecting in a different direction is provided, and the locking piece is engaged with and disengaged from a mounting hole formed in the base plate fixed in the cabinet body, and the locking portion is hidden behind the base plate. By mounting it slidably, a large number of optical cables can be easily grasped at a narrow interval, and the optical cables are not easily pulled out and can be securely held in the cabinet body.
[0028]
In the optical cable gripping tool of the present invention, it is preferable that the cable gripping main body is provided with an elastic positioning piece that engages and disengages with a positioning hole formed in a base plate fixed in the cabinet main body. In addition, no loosening phenomenon occurs and no stress is applied to the core wire, so that the transmission characteristics of the core wire are not adversely affected.
The optical cable gripping tool of the present invention is a cover case in which the lid covering the opening side of the concave groove of the optical cable gripping body opens the outer end of the concave groove forming the cable gripping part, and the optical cable gripping main body With the structure that prevents the cable from popping out, which has a locking irregularity portion that can be freely engaged and disengaged on the joint surface, it is possible to reliably prevent a decrease in the gripping force of the cable without causing any trouble due to the dropping of the cable.
Furthermore, according to the present invention, the optical fiber core wire can be quickly pulled down by opening any storage tray after the core wire connection work, the core wire can be easily identified, and the readjustment and repair of the connection portion can be easily performed. In addition to greatly improving workability, the core trays can be stacked as many times as necessary, and the entire storage trays stacked in multiple stages can be accurately retained to improve safety. .
[Brief description of the drawings]
FIG. 1 is a plan view showing an interior of a cover according to an embodiment of the present invention, with a part of the cover cut away.
2A and 2B show an optical cable gripper used in the example of FIG. 1, in which FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a right side view thereof.
3 shows a separated state of the optical cable gripper used in the example of FIG. 2, wherein (a) is a front view thereof and (b) is a rear view thereof.
4 shows an optical cable gripping body of the optical cable gripping tool of the example of FIG. 3, wherein (a) is a plan view thereof, (b) is a front view, (c) is a bottom view thereof, and (d) is a right side view thereof. (E) is a longitudinal sectional view.
5 shows a lid of the optical cable gripping tool in FIG. 3, wherein (a) is a side view thereof, (b) is a plan view, and (c) is a right side view thereof.
6A and 6B show another embodiment of the present invention, in which FIG. 6A is a plan view showing the interior of a cover with a part cut away, FIG. 6B is a front view thereof, and FIG. FIG.
[Explanation of symbols]
A Optical cable B Pull-down cable a Core wire 1 Cabinet body 2 Collective core wire storage tray 3 Individual core wire storage tray 4 Cable gripper 4 ₁ Cable gripping body touchment 4 ₂ Cover body 5 Wide groove 5 ₁ ridge 5 ₂ protrusion Wall 6 Narrow groove 6 ₁ Projection 6 ₂ Projection wall 7 Locking piece 8 Locking piece 9 Cable grommet 10 Base plate 11 Mounting hole 12 Positioning hole 13 Positioning piece 14 Cable gripping tool 15 Locking uneven part 16 Key receiving bracket 17 Key member 20 Cover

Claims (6)

An optical cable gripping body having an optical cable press-fitted with a width smaller than the outer diameter of the optical cable and communicating with a concave groove for gripping the cable and penetrating on both sides, and covering the opening side of the concave groove of the optical cable gripping body In the optical cable gripping tool having a cover body, a wide concave groove having a wide groove width in the longitudinal direction of the concave groove forming the optical cable gripping portion is divided into a wide groove width and a narrow narrow groove width. An optical cable gripping tool in an optical cable connecting cabinet, wherein a width concave groove is provided continuously so that cables having different outer diameters can be gripped. The concave groove forming the optical cable gripping portion is provided with a plurality of ridges protruding in the groove depth direction on the inner wall surface of the groove, set to have a width smaller than the outer diameter of the cable, and press-fitted into the concave groove 2. The optical cable gripper in an optical cable connection cabinet according to claim 1, wherein the optical cable is clamped so as to apply frictional resistance to the cable at a plurality of locations. When the concave groove forming the optical cable gripping part is stripped off the cable step with a large cable outer diameter and press-fitted into the wide concave groove with a wide groove width, the exit position at the stepped part of the exposed optical fiber core wire is narrow. The optical cable gripping tool in the optical cable connecting cabinet according to claim 1 or 2, wherein the optical cable gripping tool is configured to be within an interval between the groove walls of the wide groove. The cable gripping main body is provided with a plurality of the concave grooves of the optical cable gripping portion arranged in parallel at predetermined intervals on the upper surface portion thereof by a predetermined width of the projecting wall, and a locking piece protruding in a different direction on the outer side of the bottom surface portion of the cable gripping main body. The locking piece is configured to be engaged with and disengaged from a mounting hole formed in the base plate fixed in the cabinet body, and the locking portion is slidably mounted in the back of the base plate. The optical cable gripping tool in the optical cable connecting cabinet according to claim 1, 2, or 3. 5. The optical cable gripper in an optical cable connection cabinet according to claim 4, wherein the cable gripping main body is provided with an elastic positioning piece that engages and disengages with a positioning hole formed in a base plate fixed in the cabinet main body. The lid that covers the opening side of the concave groove of the optical cable gripping body is a cover case that opens the outer end of the concave groove forming the cable gripping part, and is freely detachable on the joint surface with the optical cable gripping body The optical cable gripping tool in the optical cable connecting cabinet according to claim 4 or 5, wherein the cable has a structure that prevents the cable from popping out.

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