JP4191664B2 - Optical cable connection storage box - Google Patents

Description

  The present invention relates to an optical cable connection portion storage box suitable for storing a connector connection portion of an optical cable having a small number of optical fiber cores, particularly a single-core optical cable.

  For example, a conventional optical cable connection storage box that is installed in a user's home of an optical fiber communication network and stores a connector connection between an indoor optical cable wired in the user's home and an optical cable (drop cable, etc.) on the station side is a box The main body has a structure in which a core wire connecting portion of the optical cable and a surplus length storage case for storing the surplus length are incorporated and covered with a cover. The indoor optical cable and the office side optical cable are single-core or double-core, but when connecting, strip the outer jacket of the end to expose the optical fiber core, connect the core, and then connect the core of both optical cables The extra length of the core wire is stored in the extra length storage case in the box body.

  This type of conventional optical cable connector storage box has a problem that it is difficult to downsize because the back wall and the peripheral wall of the case are doubled because the extra length storage case is incorporated into the box body as described above. It was. Further, since the extra lengths of the optical fibers of both optical cables are stored in the extra length storage case, there is a problem that the extra length is easily complicated and handling is troublesome.

  An object of the present invention is to provide an optical cable connection portion storage box that is small in size and easy to organize extra length.

The optical cable connection portion storage box according to the present invention is for storing the connector connection portion between the first optical cable and the second optical cable,
A box body having a back wall and a peripheral wall rising from the periphery of the back wall, and a cover that covers the opening of the box body,
The box body includes a first optical cable introduction portion and a second optical cable introduction portion provided on a part of the peripheral wall, a connector installation base provided on the inner side of the peripheral wall, and an inner side of the peripheral wall. a slack storage section of the first cable that is has a surplus length holding portion of the second optical cable provided outside the peripheral wall,
Each of the first optical cable and the second optical cable is composed of a single-core optical cable, and the box body is attached to the wall or pillar of the building so that the front surface is opened. The introduction part of the second optical cable is provided on both ends or one end side of the lower wall part of the peripheral wall, and the extra length holding part of the second optical cable is provided on the lower side of the lower wall part of the peripheral wall,
The lower wall portion of the peripheral wall of the box body is formed in an arch shape, and a guide for bending the second optical cable along the arched lower wall portion is provided on the lower side of the arch shape lower wall portion,
The breaking strength of the guide when an abnormal tension is applied to the second optical cable is set lower than the cable gripping strength of the introduction portion of the optical cable,
(Claim 1).

In the optical cable connection portion storage box according to the present invention, the connector installation base is provided at a distance from the back wall, and the area surrounded by the peripheral wall on the back side of the connector installation base is the extra length of the first optical cable. It is preferable that it is a storage part (Claim 2 ).

Further, in the optical cable connection portion storage box according to the present invention, the connector mounting base is provided in a stepwise manner with different intervals from the back wall, one inside the one side wall portion and one inside the other side wall portion of the peripheral wall. (Claim 3 ).

Further, the optical cable connection portion storage box according to the present invention is preferably one in which the jaw portion is formed by denting the back wall side portions of both end portions at both end portions of the arch-shaped lower wall portion ( Claim 4 ).

The optical cable connecting section housing box according to the present invention, dust-proof in the introductory part of the inlet portion and the second optical cable of the first optical cable, it is preferable that the occlusion component protectant is assembled (claim 5 ).

  According to the first aspect of the present invention, the extra length of the first optical cable is accommodated inside the box body, and the extra length of the second optical cable is held outside the box body. It does not overlap, making it easier to organize the extra length and reducing the size of the storage box. Further, since the extra length is taken in the state of the optical cable, the optical fiber core wire is not exposed and there is no possibility of damaging the optical fiber core wire. In addition, when a line failure occurs, the connector is disconnected and the measurement of the point of failure is performed. If the first optical cable and the second optical cable are owned by different companies (communication companies), one company is the optical cable of another company. You can attach and detach connectors without touching and measure only your own optical cable, and if you find that your optical cable is faulty, replace only your own optical cable without unwinding the extra length of other companies' optical cables be able to. Therefore, the responsibility of the optical cable owner company becomes clearer, and there is no risk of damaging the other optical cable when replacing one optical cable.

According to the first aspect of the present invention, since the box body is a front opening type and is small, it is attached to the wall of the building where the user terminal of the optical communication network is installed, and the indoor optical cable (first optical cable in the user's house) ) And an optical cable on the station side (second optical cable). The extra length of the optical cable on the station side is held under the box body so that it does not get in the way. Since the optical cable on the station side has weather resistance, there is no problem such as deterioration even if the extra length is held outside the box body.

According to the invention of claim 2 , since the connector installation base acts as a jump-out preventing piece for the first optical cable stored in the surplus length storage portion, the storage state of the surplus length of the first optical cable is stabilized.

According to the invention of claim 3 , up to two sets of connector connecting portions of the first optical cable and the second optical cable can be stored. Also, since the two connector mounting bases are in a different level, when two sets of connector connecting portions are accommodated, the connectors or cables coming out of the connectors are in a different level, thereby preventing mutual interference. Further, by making the difference, the distance between the tips of the two connector installation bases becomes large, and the extra length storage work of the first optical cable becomes easy.

According to the first aspect of the present invention, the second optical cable can be curved with a predetermined curvature simply by pushing the second optical cable between the arch-shaped lower wall portion and the guide. The extra length can be easily held in a loop.

According to the invention of claim 4 , since the second optical cable pushed between the arch-shaped lower wall portion and the guide is hooked on the jaw portion, the second optical cable does not jump out to the front side, and the extra length of the second optical cable is reduced. It can be held stably.

According to the first aspect of the present invention, when an abnormal tension is applied to the second optical cable, the guide is broken and the tension is first loosened, so that the second optical cable is pulled out from the introduction portion of the second optical cable. There is little fear and the bad influence to a connector connection part can be prevented.

According to the invention of claim 5 , it is possible to prevent dust, insects and the like from entering the storage box.

  1 to 6 show an embodiment of an optical cable connecting portion storage box according to the present invention. In the figure, 10 is a box body, and 12 is a cover that covers the box body 10.

  As shown in FIGS. 1 to 3, the box body 10 is a front opening type having a vertically long back wall 14 and a peripheral wall 16 rising from the periphery of the back wall 14 to the front side. The box body 10 is fixed to the wall or pillar of the building with screws so that the back wall 14 is vertical. Reference numeral 17 denotes a fixing screw hole. The box main body 10 may be laid down so that the back wall 14 is horizontal.

  The peripheral wall 16 includes an upper wall portion 16a, left and right side wall portions 16b and 16c, and a lower wall portion 16d. The lower wall portion 16d is formed in an arch shape. Two optical cable introducing portions 18 and 20 are provided adjacent to both ends of the arch-shaped lower wall portion 16d, respectively. The optical cable introducing portions 18 and 20 are both groove-shaped, but the outer optical cable introducing portion 18 has a deep groove and the inner optical cable introducing portion 20 has a shallow groove. By forming protrusions on the inner wall surfaces of the optical cable introducing portions 18 and 20, a required gripping force (resistance to pulling out) can be obtained simply by pushing the optical cable.

  Further, in order to prevent dust and insects from entering the storage box from the optical cable introducing portions 18 and 20, a dust-proof and insect-proof closing part 22 is assembled (FIGS. 4 and 5). reference). The closing part 22 is formed so as to fill all the spaces in the introduction parts 18 and 20, but when an optical cable is attached to the introduction parts 18 and 20, the position of the broken line S in FIG. By cutting and removing the tip portion, it is formed so as to fill the space excluding the optical cable.

  Two connector installation bases 24A and 24B are provided inside the peripheral wall 16. One connector installation base 24A is provided inside one side wall portion 16b, and the other connector installation base 24B is provided inside the other side wall 16c. As shown in FIG. 1, the connector mounting bases 24A and 24B are separate parts from the box portion 10a of the box body 10, and are assembled to the back wall 14 of the box portion 10a. This is to make it possible to flexibly cope with a design change of the connector installation bases 24A and 24B and to facilitate the molding of the box body 10. The connector mounting bases 24A and 24B may be formed integrally with the box portion 10a.

  The two connector installation bases 24A and 24B are provided with a space between the back wall 14 and the distance between the one connector installation base 24A and the back wall 14 is the back wall of the other connector installation base 24B. It is set smaller than the interval with 14 (see FIG. 3). That is, the two connector mounting bases 24A and 24B are provided to be stepped in the front-rear direction. Each of the connector mounting bases 24A and 24B is formed with two upper and lower connector holders 26 so that two types of connectors can be held as will be described later.

  A region surrounded by the peripheral wall 16 on the back side of the connector mounting bases 24A and 24B is an extra length storage portion 28 for the indoor optical cable (first optical cable).

  A guide 30 for bending the local optical cable (second optical cable) along the arch-shaped lower wall portion 16d is provided below the lower wall portion 16d of the peripheral wall 16 formed in the arch shape. The guide 30, the arch-shaped lower wall portion 16d, and the lower portion of the back wall 14 extending to the lower side of the lower wall portion 16d hold an extra length that holds the extra length of the loop-shaped local optical cable. Part 32 is configured. The guide 30 is connected to the back wall 14 through a thin connecting portion 34. The strength of the connecting portion 34 is set lower than the cable gripping strength of the local side optical cable introducing portion 20. Therefore, when an abnormal tension is applied to the station side optical cable held by the extra length holding unit 32, the connecting unit 34 is broken before the station side optical cable is pulled out from the introduction unit 20 (the guide 30 is broken). In this case, since the extra ring length of the station-side optical cable is loosened, that is, the guide 30 functions as a damper, the station-side optical cable is not pulled out from the introducing portion 20, and damage can be prevented.

  Further, at both ends of the arch-shaped lower wall portion 16d, a jaw portion 36 is formed by denting a portion on the back wall side (a portion on the back side of the inner optical cable introducing portion 20). The jaw portion 36 functions to prevent the extra length of the station side optical cable held by the extra length holding portion 32 from jumping out to the front side.

  On the other hand, as shown in FIGS. 1 and 6, the cover 12 is formed by integrally forming an upper peripheral wall portion 40a, left and right peripheral wall portions 40b and 40c, and an upper back plate portion 42 on the back side of the front wall 38. is there. As a result, the cover 12 covers the front opening of the box body 10, the top surface, the left and right side surfaces, and the upper back surface, and prevents rainwater or the like from entering the box body 10.

  Next, the usage state of the optical cable connection portion storage box configured as described above will be described. FIG. 7A shows a state in which only one set of optical cable connector connecting portions is housed in the box body 10. Reference numeral 44 denotes an indoor optical cable, 46 denotes a station-side optical cable, 48 denotes a connector attached to the end of the indoor optical cable 44, and 50 denotes a connector attached to the end of the office-side optical cable 46. The indoor optical cable 44 and the station side optical cable 46 are single cores (one optical fiber core wire), and are inserted and fixed in the connectors 48 and 50 together with their jackets, and the core wires are not exposed. The connector 50 on the station side optical cable 46 side has a cable lead portion bent in an L shape. When such a connector 50 is used, the indoor optical cable 44 and the local optical cable 46 can be introduced into the box body 10 through the introduction portions 18 and 20 on the same side (the right end side of the lower wall portion 16d). Easy to understand optical cable set. The first set of connector connecting portions is installed on the connector mounting base 24 </ b> A closer to the back wall 14. A flange portion 52 is formed on the connector 50 of the office side optical cable, and the connector connecting portion is held on the connector installation base 24A by pushing the flange portion 52 into the lower connector holder 26.

  The extra length of the indoor optical cable 44 is looped and stored in the extra length storage section 28 on the back side of the connector installation bases 24A and 24B. Since the connector mounting bases 24A and 24B are stepped, the distance between the leading edges becomes larger than when the connector mounting bases 24A and 24B are not stepped. The extra length of the local side optical cable 46 is formed in a loop shape, and the upper portion thereof is pushed between the arched lower wall portion 16 d and the guide 30 to be held in the extra length holding portion 32. Since the local side optical cable 46 has a certain degree of rigidity, the extra length of the loop shape tries to spread in a circular shape, and a part thereof enters the back side of the jaw portion 36. For this reason, there is no possibility that the extra length of the station side optical cable 46 jumps out from the extra length holding part 32 to the front side, and the extra length can be stably held. Further, the extra length of the station side optical cable 46 is held outside the peripheral wall 16 and exposed to the outside. However, since the station side optical cable 46 has weather resistance, problems such as deterioration do not occur.

  The closing parts 22 shown in FIG. 5 are mounted as they are on the introduction portions 18 and 20 on the side (left side) where the optical cable is not inserted. The closing parts 22 obtained by cutting away the portions beyond the broken lines S and T in FIG. 5B are attached to the introduction portions 18 and 20 on the right side of the optical cables 44 and 46 (right side). When there is only one set of connector connecting portions, the cover 12 is put on the box body 10 in this state.

  As shown in FIG. 2B, the optical cable introduction part 18 outside the box body 10 has a narrower width (interval between the projections) on the back side (back wall 14 side), and a narrower side on the entrance side. Widely formed. In this way, it is possible to grip a thin optical cable on the back side of the introduction portion 18 and a thick optical cable on the entrance side. As described above, the closing parts 22 cut away from the broken lines S and T in FIG. 5B are attached to the introduction parts 18 and 20 when a thin optical cable is gripped by the introduction parts 18 and 20. However, when a thick optical cable is gripped on the inlet side of the introduction portion 18, the blocking component 22 is cut along the broken lines T and U in FIG. Is installed on the back side of the introduction part 18 to close the gap on the back side, and then a thick cable is pushed in so that the remaining part of the closing part 22 is attached to the introduction parts 18 and 20 from above. Good.

  FIG. 7B shows a state in which two sets of optical cable connector connecting portions are housed in the box body 10. The storage state of the first set is the same as (A). The second set of connector connecting portions is installed on the connector installation base 24 </ b> B far from the back wall 14. The second set of indoor optical cable 44 and the local optical cable 46 are introduced into the box body 10 through the introduction portions 18 and 20 on the left end side of the lower wall portion 16d. In the second set as well, the indoor optical cable 44 is looped to be stored in the extra length storage section 28 on the back side of the connector mounting bases 24A and 24B, and the local optical cable 46 is looped to have an arch-shaped bottom. It is the same as that of the first set that the extra length holding portion 32 below the wall portion 16d is held. The second set of L-shaped connectors 50 are installed so that the drawing directions of the first set of L-shaped connectors 50 and the local optical cable 46 face each other, but the two connector mounting bases 24A and 24B have steps. Therefore, the station-side optical cable 46 drawn out from the second set of L-shaped connectors 50 is positioned on the near side of the station-side optical cable 46 drawn out from the first set of L-shaped connectors 50, and the two interfere with each other. Absent. In this embodiment, the case where the connector 50 of the station side cable is L-shaped has been described, but the same effect can be obtained even when the connector is linear.

  8A and 8B show a storage method when the indoor optical cable 44 and the station side optical cable 46 are connected by a general-purpose SC connector 54. FIG. (A) shows a case where only one set of connection portions of the indoor optical cable 44 and the office side optical cable 46 by the SC connector 54 is accommodated, and (B) shows a case where two sets of the connection portions are accommodated. The two SC connectors 54 are connected via an adapter 56. The adapter 56 has projecting pieces 58 on both side surfaces, and the connector connecting portion is held on the connector mounting bases 24A and 24B by pushing the projecting pieces 58 into the upper connector holder 26. Since the connection portion by the SC connector 54 is linear and has a long length, the indoor optical cable 44 does not store the extra length in the extra length storage portion 28. The extra length of the station side optical cable 46 is held by the extra length holding part 32 on the lower side of the lower wall portion 16d as in the case of FIG.

The disassembled perspective view which shows one Embodiment of the optical cable connection part storage box which concerns on this invention. The box main body of the optical cable connection part storage box of FIG. 1 is shown, (A) is a front view, (B) is a bottom view, (C) is a side view. The perspective view which looked at the box main body of FIG. 2 from diagonally upper side. The perspective view of the principal part which looked at the box main body of FIG. 2 from diagonally lower side. FIG. 3A shows a closing part used in the box body of FIG. 2, (A) is a front view, (B) is a bottom view, (C) is a right side view, and (D) is a left side view. The perspective view which looked at the cover of the optical cable connection part storage box of FIG. 1 from the back side. FIGS. 2A and 2B show a usage state of the optical cable connection portion storage box of FIG. 1, in which FIG. 1A is a front view when only one set of connector connection portions is stored, and FIG. FIG. 8 shows another usage state of the optical cable connection portion storage box of FIG. 1, (A) shows a front view when only one set of SC connector connection portions is stored, and (B) shows a front view when two sets of SC connector connection portions are stored. Figure.

Explanation of symbols

10: Box body 12: Cover 14: Back wall 16: Peripheral wall 16a: Upper wall portion 16b, 16c: Side wall portion 16d: Lower wall portion 18, 20: Optical cable introduction portion 22: Closure component 24A, 24B: Connector installation base 26: Connector holder 28: Extra length storage part 30: Guide 32: Extra length holding part 34: Connection part 36: Jaw part 44: Indoor optical cable 46: Station side optical cable 48: Indoor side optical cable side connector 50: Station side optical cable side connector 54: SC Connector 56: Adapter

Claims (5)

An optical cable connection portion storage box for storing connector connection portions between the first optical cable (44) and the second optical cable (46),
A box body (10) having a back wall (14) and a peripheral wall (16) rising from the periphery of the back wall, and a cover (12) covering the opening of the box body;
The box body (10) includes a first optical cable introduction portion (18) and a second optical cable introduction portion (20) provided on a part of the peripheral wall (16), and an inner side of the peripheral wall (16). Connector mounting bases (24A, 24B) provided on the inner wall, a first optical cable extra length storage part (28) provided on the inner side of the peripheral wall (16), and an outer side of the peripheral wall (16). has extra length holding portion of the second optical cable and (32),
Each of the first optical cable (44) and the second optical cable (46) is a single-core optical cable, and the box body (10) is attached to a wall or a pillar of a building and is formed so that the front surface is opened. The introduction portion (18) of the first optical cable and the introduction portion (20) of the second optical cable are provided at both ends or one end side of the lower wall portion (16d) of the peripheral wall, and hold the extra length of the second optical cable. The portion (32) is provided below the lower wall portion (16d) of the peripheral wall,
The lower wall portion (16d) of the peripheral wall of the box body (10) is formed in an arch shape, and the second optical cable (46) is placed on the lower side of the arched lower wall portion (16d). ) Is provided along the guide (30),
The breaking strength of the guide (30) when an abnormal tension is applied to the second optical cable (46) is set lower than the cable gripping strength of the introduction portion (20) of the optical cable.
An optical cable connector storage box. The optical cable connection portion storage box according to claim 1 , wherein the connector installation base (24A, 24B) is provided with a space between the rear wall (14) and the back side of the connector installation base (24A, 24B). An optical cable connecting portion storage box characterized in that a region surrounded by the peripheral wall (16) is an extra length storage portion (28) for the first optical cable. The optical cable connection portion storage box according to claim 2 , wherein the connector mounting base (24A, 24B) is provided one inside each side wall portion (16b) and one inside the other side wall portion (16c) of the peripheral wall, An optical cable connection portion storage box characterized by being provided at different levels with different intervals from the back wall (14). The optical cable connection portion storage box according to claim 1 , wherein a jaw portion (36) is formed at both ends of the arch-shaped lower wall portion (16d) by denting portions on the back wall side of the both ends. An optical cable connector storage box, characterized in that A cable connecting portion housing box according to any one of claims 1 to 4, the introductory part of the first optical cable (18) and the second introduction part of the optical cable (20) to the dust-proof, closed part of the protectant ( 22) An optical cable connector storage box, wherein the optical cable connector storage box is assembled.

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