JP3360277B2 - Sleeve for holding communication cable and connection box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sleeve for holding a communication cable and a connection box for the sleeve.

[0002]

2. Description of the Related Art Conventionally, a main cable (a plurality of communication cables such as a metal cable and an optical fiber cable) laid overhead along with a supporting cable near a telephone pole,
The branch cable routed from the main cable has a connection portion and a region separated by a predetermined distance from the connection portion surrounded by a connection box (closure) and protected in a drip-proof state.

[0003] The conventional connection box has a two-
It is a cylindrical body that is divided or opened and closed along the axial direction, and the openings at both ends are closed,
An end face member that forms a so-called cable introduction portion that seals the outer peripheral portions of the main cable and the branch cable (drop wire) so as to keep it drip-proof is arranged.

[0004] The end face member has a semi-cylindrical shape composed of two parts that are symmetrically divided into two parts, or a substantially elliptical cylindrical shape that can be opened and closed in the axial direction with a hinge portion as a support shaft. A seal portion (for example, made of various rubbers, an elastomer, an adhesive tape, a self-sealing tape, and the like) that seals the outer peripheral surfaces of the main cable and the branch cable together with the supporting cable so as to keep the outer peripheral surface of the branch cable drip-proof is used. An outer cylindrical portion is provided on the outer peripheral side of the seal portion.

According to the conventional connection box, when an operation such as connecting a branch cable to a main cable or removing the branch cable from the main cable is performed, an end member is held and attached to an outer peripheral side thereof each time. After removing the tubular body, it is necessary to further remove the end face member attached to the outer peripheral side while holding the supporting cable and the main cable. Also, between the end face member and the newly installed branch cable,
Alternatively, after the branch cable is removed, it is necessary to perform a sealing process so as to keep a drip-proof state so as to prevent rainwater from being transmitted from the outside and flowing into a gap formed in the end face member.

[0006]

According to the conventional connection box, there are the following problems. That is, (1) in the case where the branch cable is branched from the main cable and in the case where the branch cable is removed from the main cable, conversely, in addition to the operation of removing the tubular body,
Disassembly operation of the end face members installed at both ends of the tubular body (the one composed of the two parts is divided into two parts, or one that is configured to be openable and closable along the axial direction by using a hinge as a pivot. Must be opened) and thereafter, an assembling operation needs to be performed in a procedure reverse to that described above, and these operations are complicated, workability is low, and work costs are increased. (2) The connection box is defined by a standard of a predetermined size. For this reason, the end members serving as cable introduction portions disposed at both ends of the cylindrical body are used to seal the support cable, the main cable and the branch cable in a drip-proof state, and to add a branch cable in a drip-proof state when adding a branch cable. The maximum possible number is limited to approximately six. (3) Further, the cross-sectional shape of the branch cable is non-circular (an elliptical shape having an outer diameter of 3 mm × 5 mm) and circular (having an outer diameter of 1 mm).
(0 mm to 40 mm), which makes it difficult to hold and seal in a drip-proof state using, for example, a sealing portion of the main cable in the end face member.

That is, since the cross-sectional shape of the branch cable is non-circular or the outer diameter (thickness) is different, if the end face member is used as a cable introduction part and the introduction part for the main cable is used as it is, it is necessary to use A seal portion having a seal inner diameter corresponding to the determined outer diameter becomes useless, and in each case, it is necessary to consider a sealing process (waterproofing process) different from the seal portion. In addition, the branch wiring operation cannot be performed quickly due to the necessity of a hole filling process when the branch cable is removed from the seal hole that has sealed the branch cable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a sleeve for holding a communication cable and a connection box for the communication cable, which can solve the conventional problems. That is, according to the present invention, a connection box (closure) for protecting a connection portion between a main cable laid overhead along with a support cable near a power pole and a branch cable wired from the main cable in a drip-proof state is provided. In the configuration in which the supporting cable, the main cable, and the branch cable are sealed so as to be held in a drip-proof state by the end surface member to be formed, even when a non-circular branch cable thinner than the main cable is added, the cable introduction section Provided is a configuration that can improve workability such as connection and detachment of an additional branch cable without disassembling an end surface member to be formed, and can be held in a drip-proof state and sealed.

[0009]

The first invention is the first invention.
The sleeve has a plurality of guide holes through which a communication cable is removably inserted and a base portion having one end communicating with the guide hole, the other end being opened, and a housing space located on the axial extension of the guide hole. , while being mounted to an opening of the accommodation space, and a lid having a plurality of holes each opposed through the space into a plurality of the guide holes, are filled in the receiving space, vent credit cable
As the cable is inserted, the passage of the communication cable
Formed and adhere to the outer periphery of the communication cable
Elastically, and remove it when removing the communication cable.
Closed the path of the removed communication cable by its own elasticity.
And an elastic sealing material which is elastically deformed so as to be chained .

The sleeve according to claim 2 is the sleeve according to claim 1, wherein the elastic sealing material has an Asker hardness of F.
Is a gel polymer of 50 to 90. According to a third aspect of the present invention, there is provided a connection box, wherein a plurality of guide holes through which a communication cable is detachably inserted and one end thereof communicate with the guide hole, and the other end is opened. A base portion having a housing space located at a position, a lid portion having a plurality of holes respectively attached to the openings of the housing space and facing the plurality of guide holes through the space, and filling the housing space. , the
As the communication cable is inserted, the communication cable
And a peripheral part of the communication cable.
Elastically deformed so that it closely adheres to the cable, and pull out the communication cable
When the communication cable has been removed,
An elastic sealing member is elastically deformed so as to close the gender, a connection box making protecting accommodates a sleeve for holding a communication cable, characterized in that the more, 2 along the axial direction of the connecting box making A cylindrical intermediate portion which is divided or opened and closed along the axial direction and accommodates a connection portion of the communication cable therein, and an opening which is located at both ends of the cylindrical intermediate portion and through which the communication cable is inserted. The opening has a cylindrical end that closes the opening and places the sleeve;
An outer peripheral portion of the sleeve is sealed so as to maintain a drip-proof state.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION As a material of a base and a lid of a sleeve, various engineering plastics such as ABS resin (acrylonitrile / butadiene / styrene resin), vinyl chloride, polypropylene, polyacetal, polycarbonate, and PPS (polyphenylene sulfide) can be used. it can. The material of the base of the sleeve and the material of the lid may be the same or different.

The plurality of guide holes in the base of the sleeve and the plurality of holes in the lid have inner diameters set so that at least the branch cable having the largest outer diameter can be inserted. The number of guide holes in the base of the sleeve and the number of holes in the lid can be as small as two to twelve depending on the difference between the outer shape of the main cable and the outer shape of the branch cable. 4 to 8
Mostly used individually.

[0013] The outer shape of the base of the sleeve is cylindrical,
A material similar to a columnar shape can be used. The outer diameter value of the base of the sleeve is set in a range in which the sealing method of the main cable is directly applied. The reason for this is that special methods such as increasing the outer diameter by taping the waterproof seal on the outer circumference of the base of the sleeve, for example, when the outer diameter of the base of the sleeve is smaller than the outer diameter of the main cable, etc. Can be avoided and can be sealed by the same means as the main cable.

Means for attaching the lid to the opening of the storage space in the base include bonding using an adhesive (material), heat welding, a female screw formed on one of them, and a male screw formed on one of the other. Screwing, press fitting, or the like. The size of the accommodation space of the base is wider than a region facing the plurality of guide holes of the base and the plurality of holes of the lid.

[0015] The elastic sealing material is filled in the housing space.
As the elastic sealing material, for example, a polymer of styrene / ethylene / butadiene / styrene, or a gel polymer having an Asker hardness F of 50 to 90, such as a gel material of silicon or urethane, can be used. The reason why the Asker hardness F of the gel polymer is 50 or more and 90 or less is described in JI.
The purpose of the present invention is to achieve a grade 3 and rainproof type specified in SC0920 “General rules for waterproof test of electric machine equipment and wiring materials”.

If the Asker hardness F is more than 90, when inserting the communication cable into the gel polymer through the guide hole of the sleeve, it cannot be inserted quickly only by the pressing force of the operator. In this case, a step of previously penetrating the gel polymer using a jig or the like is required. If the Asker hardness F is less than 50, a satisfactory sealing function cannot be obtained.

When the elastic sealing material is filled in the housing space of the sleeve, one kind of material is uniformly filled,
Along the axis of the sleeve, a layer made of an elastic sealing material, a space layer, and a layer made of an elastic sealing material are filled in this order, or a plurality of gel materials having different Asker hardnesses with Asker hardness F of 50 to 90 are used. And a plurality of gel materials may be filled in multiple layers along the axis of the sleeve via a space layer along the axis of the sleeve.

The sleeve is used in a state where it is held by end face members arranged at openings at both ends of the tubular intermediate portion of the connection box (closure). The outer peripheral portion of the branch cable can be held in a drip-proof state by inserting the branch cable outside the end member into the plurality of guide holes of the sleeve and the elastic sealing material in the housing space without disassembling the end member. In a sealed state, it can be inserted into a region surrounded by the tubular intermediate portion of the connection box. Conversely, the branch cable located in the region surrounded by the tubular intermediate portion of the connection box can be pulled out of the end face member, and the drawn portion is kept drip-proof by the elastic sealing material in the housing space of the sleeve. And sealable.

The connection box is referred to as a closure and is formed of a cylindrical body that can be divided or opened and closed in the axial direction, and has a substantially elliptical housing space surrounding the connection between the main cable and the branch cable. A large cylindrical intermediate portion to be formed, and an opening having a cross-sectional shape substantially similar to the cross-sectional substantially elliptical shape of the cylindrical intermediate portion and formed at both ends of the cylindrical intermediate portion and smaller than the cylindrical intermediate portion And

An end face member for closing the opening, holding the sleeve in a drip-proof state, and sealing the sleeve is disposed in the opening. The end surface member is a ring-shaped member that can be divided or opened and closed in the axial direction. The outer peripheral surface of a support cable and a main cable (a plurality of communication cables such as a metal cable and an optical fiber cable) previously laid overhead. A seal member having a seal hole for sealing the seal member in a drip-proof state, and an outer peripheral member provided on the outer peripheral side of the seal member and having a predetermined thickness for firmly holding the seal member.

[0021]

【Example】

(Embodiment 1) A first embodiment of a sleeve for holding a communication cable (hereinafter, referred to as a sleeve) according to the first invention will be described with reference to FIGS. The sleeve 1 of the first embodiment is similar to the sleeve 1 shown in FIG.
And a substantially columnar shape as shown in FIG. The sleeve 1 includes a plurality of guide holes 20 parallel to each other and a base 2 having one end communicating with the guide hole 20, an opening 21 a at the other end, and a housing space 21 located on the axial extension of the guide hole 20. Opening 21a of space 21
And a resilient sealing material 4 (indicated by a black dot area in the figure) which fills the housing space 21 of the base 2 and is elastically deformed.

The base 2 is made of ABS resin (acrylonitrile / butadiene / styrene resin) and has a total length L of 120 m.
m, the outer diameter D1 is 24 mm, and the length L1 is 90
mm small-diameter shaft portion 2a and an outer diameter D connected to the small-diameter shaft portion 2a.
2 is a large-diameter shaft portion 2b having a length L2 of 30 mm and a length L2 of 30 mm. The inner diameter d1 of the guide hole 20 is 5 mm. As shown in FIGS. 2 and 3 as viewed from the left side and the right side in FIG. 1, the guide holes 20 include six guide holes arranged at equal intervals in the circumferential direction.

The lid 3 is made of an ABS resin (acrylonitrile / butadiene / styrene resin) and has a substantially disk shape with a thickness of about 3 mm, and an opening 21 a of the accommodation space 21 of the base 2.
And a plurality of holes 30 respectively opposed to the plurality of guide holes 20 of the base 2 via the accommodation space 21. The inner diameter d2 of the hole 30 is 5 mm.

The lid 3 is inserted into the opening 21a after the elastic sealing material 4 is filled in the accommodating space 21, and the plurality of holes 30 are aligned with the plurality of guide holes 20 of the base 2. It is thermally welded to the base 2. As the elastic sealing material 4, a polymer of styrene / ethylene / butadiene / styrene is used as a gel polymer having an Asker hardness F of about 70.

The sleeve 1 configured as described above is an end face member that is disposed and held in a drip-proof state at openings 6a and 6b formed at both ends of a cylindrical intermediate portion 6 of a connection box 6A shown in FIG. 5a and 5b. The end members 5a, 5a
As shown in FIG. 4, b swings in the vertical direction perpendicular to the axial direction P1 around the hinge portion 50 (support shaft) formed on the back side, and opens and closes along the axial direction P1. A pair of seal members 51, 51, which are opposed to each other in a bilaterally symmetrical manner, and the outer periphery of the seal members 51, 51 is firmly covered and made of resin connected via the hinge portion 50. And outer wall portions 52, 52.

The seal members 51, 51 are provided on the inner peripheral side thereof.
Seal holes 510, 511, 512, 513 formed by two opposing semicircular holes for holding and sealing the support cable 8, the main cable 7, the two sleeves 1 and the like, respectively, in a drip-proof state. Are formed in order from a position close to the hinge part 50. The outer wall portions 52, 52 are formed with plate-like flange portions 520, 520 hanging down from the lower ends thereof. The flange portions 520 and 520 are portions that are clamped by a lock member (not shown) to fix and hold the seal holes 510, 511, 512, and 513 in a closed state.

The support cable 8 and the main cable 7 previously laid overhead in the seal holes 510, 511 of the seal members 51, 51 by the end face members 5a, 5b.
However, the sleeves 1 and 1 are held in the sealing holes 512 and 513 in a drip-proof state, respectively, and are sealed (see FIG. 8). If necessary, as shown in FIG. 5, when connecting or branching to the main cable 8 in a region 6d which is surrounded by the tubular intermediate portion 6 of the connection box 6A and is shielded from the outside and protected. Prior to this, only the connection box 6A shown in FIG. 5 is removed, and branching for individual wiring of the desired outer diameter is performed on the sleeves 1 and 1 (see FIG. 8) held on the end face members 5a and 5b. The cables 9a and 9b are inserted from outside into the guide holes 20 of the base 2 of the sleeve 1 in the direction of arrow S1 (see FIG. 6). The branch cables 9a and 9b are substantially elliptical having an outer diameter D3 (major axis) and a diameter D4 (minor axis) of 4 × 3 mm, respectively. The branch cable 9a has an outer diameter D.
3 (long axis) shows the case where the 4 mm side is used vertically, and the branch cable 9b shows the case where the outside diameter D4 (short diameter) 3 mm side is used vertically.

The branch cables 9a and 9b move their tips toward the hole 30 of the lid 3 with the guide hole 20 of the base 2 as a guide, and the middle of the elastic sealing material 4 filled in the accommodating space 21. Rush into. For this reason, the elastic sealing material 4 is elastically deformed in a direction in which the elastic sealing material 4 is pressed and compressed by the branch cables 9a and 9b while being held by the peripheral wall 22 of the housing space 21 and the lid 3.

The branch cables 9 having different outer diameters are generated by the elastic reaction force caused by the elastic deformation of the elastic sealing material 4.
The outer peripheral surfaces of a and 9b are elastically covered, held in a drip-proof state, and sealed. In this way, the branch cables 9a, 9b are connected to the end member 5 as shown in FIG.
a and 5b are not disassembled and inserted into the guide holes 20 of the bases 2 of the sleeves 1 and 1 as guides, and the leading ends reach the holes 30 of the lid 3 via the elastic sealing material 4 and are shown in FIG. From the position, it is further pulled out from the sleeve 1 by a predetermined length, and the operation of connecting to the main cable 7 is performed.

In contrast to the operation of connecting and branching to the main cable 7, the operation of disconnecting the branch cables 9a and 9b from the main cable 7 is performed when the operation of disconnecting the main cable 7 is performed. The released branch cables 9a and 9b are
The operation can be completed by a simple and quick operation of simply pulling out the hole 30, the elastic sealing material 4, and the guide hole 20 of the base 2 in the direction of arrow S2 in this order.

As the branch cables 9a and 9b are pulled out from the elastic seal member 4, the elastic seal member 4 closes the position where the branch cables 9a and 9b existed with its own elasticity. Hole 30 and guide hole 20 of base 2
Communication is disconnected and closed, kept drip-proof and sealed. In the first embodiment, the case where the branch cables 9a and 9b set to two kinds of outer diameter values are inserted into and pulled out of the guide hole 20 of the base 2 of the sleeve 1 and the hole 30 of the lid 3 using the branch cables 9a and 9b is described. The present invention is not limited to this. The present invention can be applied to a branch cable having an outer diameter value that can be inserted and pulled out by maximizing a predetermined inner diameter d1 of the guide hole 20 and an inner diameter d2 of the hole 30. (1) Therefore, according to the sleeve 1 of the first embodiment, the end face members 5a, 5b arranged in the openings 6a, 6b of the connection box 6A.
b and the support cable 8 and the main cable 7 in advance, and are merely connected and assembled.
5b, the branch cables 9a and 9b are only inserted linearly in the order of the guide hole 20 of the base 2, the elastic sealing material 4 in the storage space 21, and the hole 30 of the lid 3, or vice versa. Branch cable 9a, 9b in the order of the hole 30, the elastic sealing material 4 in the accommodation space 21, and the guide hole 20 in the base 2.
, Regardless of the cross-sectional shapes and outer diameters of the branch cables 9a and 9b, which are extremely simple operations, can be maintained in a drip-proof state and can be sealed. Guided operation can be performed smoothly and quickly, improving workability.

For this reason, the conventional end face member is disassembled,
No re-assembly work is required, and the operation cost can be greatly reduced as compared with the conventional case. (2) In the case of the first embodiment, the branch cable 9
a and 9b can be held in a drip-proof state, and the number of seals that can be sealed is six in each of the two sleeves 1 and 1, a total of 12
This is twice as many as the conventional maximum number of six, making it possible to expand the number dramatically.

The branch cables 9a and 9b can be held by setting the outer diameter D1 of the small diameter shaft portion 2a of the base 2 of the sleeve 1 to be the same as the outer diameter of the main cable 7 and the end member 5a. , 5b seal hole 5 for holding main cable 7
11 can be further added by forming a plurality of the holes 11 and diverting the seal holes 511 for holding the sleeve 1. (3) The base 2 of the sleeve 1 includes a small-diameter shaft portion 2a and a large-diameter shaft portion 2b connected to the small-diameter shaft portion 2a, and the small-diameter shaft portion 2a is formed of the end face members 5a and 5b. Seal hole 512,
513, the large-diameter shaft portion 2b is
Also, it functions as an axial stopper that engages with a and 5b, and a retaining effect is obtained.

(Second Embodiment) A second embodiment of the present invention, a connection box (closure) according to a second embodiment, will be described with reference to FIG. 10 and with reference to FIGS. 5, 8, and 9 of the first embodiment. Example 2
The connection box (closure) 6A is a cylindrical body having a so-called back-opening symmetrical half-cylindrical body integrally connected on the back side as shown in FIG. 10 and integrally forming a hinge 61 serving as an opening and closing center. Then, it swings in a closing direction (see arrow Z1) and an opening direction (see arrow Z2) about a back side as a center (support axis) on a vertical line Y perpendicular to the axial direction P, and opens and closes along the axial direction P. It is a configuration that can be done.

The connecting box 6A is formed at a large cylindrical intermediate portion 6 which forms a housing space having a substantially elliptical cross section, and is formed at both ends of the cylindrical intermediate portion 6, and has a substantially elliptical cross section at the cylindrical intermediate portion 6. The openings 6a and 6b are substantially similar in shape and have a cross-sectional shape smaller than the cylindrical intermediate portion 6. As shown in FIG. 5, the cylindrical intermediate portion 6 includes a main cable 7 and branch cables 9a, 9a.
A space area is formed to protect the periphery of the connection 6c with b.

As shown in FIG. 5, the openings 6a and 6b hold the end members 5a and 5b of the first embodiment. In addition,
In the cylindrical intermediate portion 6 and the opening portions 6a and 6b, vertical plate-like flange portions 62 and 62 (see FIG. 9) which are suspended from the bottom and substantially perpendicular to the back side hinge portion 61 are opposed to each other. Is formed.

The flanges 62, 62 have connection boxes 6
In order to maintain the closed state except when it is necessary for A to open around the hinge 61, the flange 6
A lock member (not shown) that holds the pair 2 and 62 is mounted. Connection box (closure) 6A configured as described above
In the use, the cylindrical intermediate portion 6 and the opening 6a,
The closed state is released by operating a lock member (not shown) for clamping and fixing the flange portions 62, 62 of 6b in a closed state.

Next, the cylindrical intermediate portion 6 and the opening 6a,
6b is pivoted about the hinge 61 in the opening direction (see arrow Z2), and is opened to open the inside thereof. In the openings 6a and 6b in this state, the main cable 7, the supporting cable 8, and the sleeves 1 and 1 of the first embodiment are held in advance in the sealing holes 510, 511, 512 and 513, respectively, in a drip-proof state and sealed. In the state where the end members 5a and 5b (see FIG. 8) or the end members 5a and 5b (see FIG. 9) into which the branch cables 9a and 9b are inserted are arranged, the hinge 61 is turned in reverse to the above case. The end surfaces 5a, 5b are held by swinging in the closing direction (see arrow Z1) as a center, and the cylindrical intermediate portion 6 and the flange portions 62, 62 of the openings 6a, 6b are held by a lock member (not shown). Hold in the closed state.

As a result, as shown in FIG. 5, the connecting box 6A can protect the connecting portion 6c between the main cable 7 and the branch cables 9a and 9b in a drip-proof state by the cylindrical intermediate portion 6, and The end members 5a and 5b holding the
In a and 6b, the drip-proof state can be maintained and sealing can be performed. Therefore, according to the connection box 6A of the second embodiment, the connection portion between the main cable 7 laid overhead along with the support cable 8 near the electric pole (not shown) and the branch cables 9a and 9b wired from the main cable 7 is provided. A supporting cable 8, a main cable 7, and a branch cable 9 are provided by end face members 5a and 5b disposed on both ends of a connection box 6A for protecting the connection box 6c in a drip-proof state.
In the configuration in which the a and 9b are held in a drip-proof state and sealed, operations such as connection and disconnection of the branch cables 9a and 9b in the connection portion 6c region are performed by the end face members 5a and 5b.
Without disassembling, the cylindrical intermediate portion 6 and the opening 6a,
6b can be removed, and the drip-proof state can be maintained and sealed by a quick operation of merely inserting the connection portion 6c through the sleeves 1 and 1 or pulling it out.
Workability can be improved.

The values and materials used in the first and second embodiments are not limited to those described above, and can be variously changed according to the purpose.

[0041]

【The invention's effect】

(1) According to the sleeve of the first aspect of the present invention, the branch cable is guided from the outside of the base by using the plurality of guide holes of the base as a guide, and the elastic sealing material of the housing space and the hole of the lid are linearly arranged in this order. It is possible to quickly dispose the end face members disposed at the openings at both ends of the cylindrical body of the connection box without disassembling the end surface members simply by inserting and inserting the plug into the region surrounded by the cylindrical body. Can be kept drip-proof and sealed.

Further, by simply pulling the branch cable out of the elastic sealing material in the housing space and the hole of the lid using the guide hole of the base as a guide, the end members disposed at the opening portions at both ends of the tubular body of the connection box can be removed. Without disassembling operation, it can be quickly pulled out from the region surrounded by the cylindrical body to the outside of the base,
In addition, the elastic seal material can hold and seal in a drip-proof state.

Therefore, the sleeve according to the first aspect of the present invention provides a guide hole in the base, an elastic sealing material in the housing space, without disassembling the end face members disposed in the openings at both ends of the tubular body of the connection box.
Only let the branch cable go straight in the order of the lid holes,
Or conversely, the hole of the lid, the elastic sealing material in the accommodation space,
Extremely simple and quick operation, just pull out the branch cable in the order of the guide holes in the base. Work costs can be significantly reduced.

That is, by disassembling the conventional end face member, the branch cable can be disposed so as to be sealable via the sealing material, and the work of closing the end face member again can be omitted.
Further, since the sleeve has a plurality of guide holes, the number of branch cables corresponding to the number of the guide holes can be increased, and the sleeve can be maintained in a drip-proof state regardless of its cross-sectional shape and outer diameter, and Can be sealed. (2) According to the connection box of the third invention, which is the second invention, the connection portion between the main cable laid overhead along with the support cable near the power pole and the branch cable wired from the main cable is set in a drip-proof state. In a configuration in which the supporting cable, the main cable, and the branch cable are held in a drip-proof state and sealed by the end members disposed at the openings at both ends of the connection box to be protected, the end members are held in a drip-proof state, and It can be inserted into the connection via a sealed sleeve or pulled back.

Therefore, operations such as connection and disconnection of the branch cable can be performed quickly without disassembling the end face member, so that the workability can be improved, the drip-proof state can be maintained, and sealing can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a sleeve of the first invention, and showing the sleeve longitudinally cut along an axial direction thereof.

FIG. 2 is a left side view of a base of the sleeve according to the first embodiment.

FIG. 3 is a right side view of a base of the sleeve according to the first embodiment.

FIG. 4 is a perspective view showing a state in which the sleeve according to the first embodiment is mounted on the end face member.

FIG. 5 shows a state after the sleeve of the first embodiment is attached to the end face member.
The schematic diagram which shows the use condition which attached the connection box further.

FIG. 6 shows a state after the sleeve of the first embodiment is attached to the end face member.
Sectional drawing which shows the state which inserts and removes a branch cable from the exterior to a sleeve along the axial direction, and shows it.

FIG. 7 shows a state after the sleeve of the first embodiment is attached to the end face member.
Sectional drawing which shows the state which inserts and removes a branch cable from the exterior to a sleeve along the axial direction, and shows it.

8 seals the sleeve in FIG. 4 together with the supporting cable and the main cable in an end face member in a drip-proof state,
FIG. 3 is a perspective view showing a held state.

FIG. 9 is a perspective view showing a state in which a branch cable is inserted through a sleeve in FIG. 8;

FIG. 10 is a perspective view schematically illustrating the appearance of a connection box according to a second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sleeve 2 ... Base 2a ... Small diameter shaft part
2b large diameter shaft portion 20 guide hole 21 accommodation space 3 lid 30 hole 4 elastic seal material 5a, 5b end face member 6A connection box 6 cylindrical intermediate portion 6a
6b: Opening 7: Main cable 8: Support cable 9a, 9
b… Branch cable

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kanaya Obube 1300, Irika-shinda, Kita-gaiyama, Komaki-shi, Aichi Japan Inside Nippon Telecommunications Materials Co., Ltd. (72) Mitsuo Kama Inventor 3-chome Nishishinjuku, Shinjuku-ku, Tokyo 19-2 Nippon Telegraph and Telephone Corporation (72) Inventor Tetsuya Hoshijima 192-1 Nishi Shinjuku 3-chome, Shinjuku-ku, Tokyo (72) Inventor Toshiyuki Ishikawa Nishi-Shinjuku, Shinjuku-ku, Tokyo (3) 192-1 Nippon Telegraph and Telephone Corporation (72) Yoshiyuki Yoshii 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-61-247210 (JP, A) JP-A 4-109703 (JP, U) JP-A 3-106830 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H02G 15/10 H01B 17 / 56 H02G 3/08 H02G 3/22

Claims (3)

(57) [Claims] 1. A plurality of guide holes through which a communication cable is detachably inserted and one end of which communicates with the guide hole, and the other end is opened,
A base having an accommodation space positioned on the axial extension of the guide hole, and a lid mounted to the opening of the accommodation space and having a plurality of holes respectively opposed to the plurality of guide holes via the space; Part and the communication cable filled in the housing space
To form a passage for the communication cable
As well as close contact with the outer periphery of the communication cable.
Elastically deformed and removed when removing the communication cable.
Closed the communication cable passage by its own elasticity.
Sleeve for holding an elastic sealing material so that the elastic deformation, the communication cable characterized by comprising more. 2. The elastic sealing material has an Asker hardness F of 5
The sleeve for holding a communication cable according to claim 1, wherein the sleeve is a gel polymer having a size of 0 to 90. 3. A plurality of guide holes through which a communication cable is detachably inserted and one end of which is communicated with the guide hole, and the other end is opened.
A base having an accommodation space located on the axial extension of the guide hole, and a lid mounted to the opening of the accommodation space and having a plurality of holes respectively opposed to the plurality of guide holes via the space; Part and the communication cable filled in the housing space
To form a passage for the communication cable
As well as close contact with the outer periphery of the communication cable.
Elastically deformed and removed when removing the communication cable.
Closed the communication cable passage by its own elasticity.
An elastic sealing material so that the elastic deformation, a connection box making protecting accommodates a sleeve for holding a communication cable, characterized in that the more or divided into two parts along the axial direction of the connecting box making Opening and closing along the axial direction, a cylindrical intermediate portion that accommodates the connection portion of the communication cable therein, and openings located at both ends of the cylindrical intermediate portion and through which the communication cable is inserted, A connection box, wherein the opening has a cylindrical end that closes the opening and has the sleeve disposed therein, and the outer periphery of the sleeve is sealed so as to maintain a drip-proof state.