JPH08149673A - Coaxial cable assembly - Google Patents

Abstract

PURPOSE: To facilitate the wiring work significantly by connecting a plurality of branch unit or distribution units, fixed at a constant interval to a tension member, with coaxial cables branched from a main coaxial cable for connecting the branch unit or distribution units sequentially. CONSTITUTION: A plurality of branch units 3 or distribution units 4, fixed at a constant interval to a tension member 2, are connected sequentially with a main coaxial cable 5 through branch coaxial cables 6 having predetermined length. The collective coaxial cable 1 thus prepared is wound around a drum or the like and transported to a building field where the cable is unwound and laid. Since only the layout work is required in the field, the work is facilitated significantly and the work schedule is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective coaxial cable, and more particularly to a collective coaxial cable which can greatly facilitate wiring work.

[0002]

2. Description of the Related Art In buildings, condominiums (apartments, condominiums, etc.), hotels, hospitals, etc., television common listening facilities are installed so that almost all rooms or dwelling units can be installed. Along with this, the amount of wiring work is becoming enormous.

As shown in FIG. 14, as a conventional wiring construction method, a cable rack a (or a pipe) is installed in a shaft which serves as a vertically penetrating portion, and a trunk line connected to a rooftop antenna or the like is installed along the cable rack a. The coaxial cable b for use is laid vertically. On the other hand, a storage box c is installed on each floor, and a distributor d (7F) or a branching device e (6F or less) is installed in the box c. The trunk coaxial cable b is connected to the distributor d or the branching device e, and the distributor d
Alternatively, another branching coaxial cable f is connected to the branching device e to branch it. Then, the branching coaxial cable f is laid so as to extend to each room / dwelling unit.

[0004]

By the way, a connector is attached to the coaxial cables b and f at the connecting portion of the trunk or branch coaxial cables b and f and the distributor d or the branching device e, and the connector thereof is provided. Is connected to the connector portion of the distributor d or the branch device e, and the coaxial cables b and f are connected to the distributor d or the branch device e. The work of attaching the connectors to the coaxial cables b and f, which is performed here, is performed in an unfavorable work environment, requires a lot of skill, and is large in number.
This caused variations in quality, lengthening the construction period, and increasing construction costs.

Further, it is necessary to set a storage box c for mounting the distributor d or the branching device e, which requires a considerable space. In addition, it is necessary to separately perform equipment installation work, wire extension work, and connection work, which is troublesome.

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is to provide a novel collective coaxial cable capable of greatly facilitating wiring work.

[0007]

In order to achieve the above object, a collective coaxial cable according to claim 1 of the present invention comprises:
A tension member, a plurality of branching units or distributors attached to the tensioning members at predetermined intervals, and a trunk coaxial cable provided along the tensioning member to sequentially connect the branching units or distributors. ,
A branching coaxial cable having a predetermined length, which is connected to the branching unit or the distributor and is branched from the branching unit or distributor.

According to the second aspect of the present invention, the tension member has a core wire portion made of galvanized steel single wire or stranded wire, and PE and PVC for covering the outer peripheral portion of the core wire portion.
And the like.

Further, in the present invention as set forth in claim 3, the branching device or the distributor and the connecting portion between the branching device or the distributor and the trunk and branch coaxial cables are integrally covered with a removable coating layer. It is a thing.

According to the present invention of claim 4, the tension member is formed of a conductive metal and is grounded, and the branching device or the distributor is electrically connected to the tensioning member.

[0011]

According to the structure described in claim 1, since each component is attached to the tension member, it is sufficient to carry out the wire laying work after transporting to the site after manufacturing at another place such as a factory. Laying work can be simplified.

According to the second aspect of the invention, it is possible to secure the mechanical strength by the core wire portion and to insulate and protect the core wire portion by the covering portion.

Further, according to the structure of claim 3, it is possible to protect the branching device and the like.

Further, according to the structure of claim 4, it is possible to collectively ground the branching device and the like.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a front view showing a laid state of a collective coaxial cable according to the present invention. The collective coaxial cable 1
The whole is prefabricated so that it is made in another place such as a factory in advance, and the length of the tension member 2 etc. is also determined based on the TV co-listening equipment or CATV equipment drawing of the building or the like. To be done.

The collective coaxial cable 1 is provided with a tension member 2, a plurality of branching units 3 or distributors 4 attached to the tensioning member 2 at predetermined intervals, and a branching unit 3 provided along the tensioning member 2. Alternatively, it is mainly configured by a trunk coaxial cable 5 that sequentially connects the distributors 4, and a branching coaxial cable 6 that is connected to the branching device 3 or the distributor 4 and branched from the branching device 3 or the distributor 4. Then, the assembled coaxial cable 1 is transported to a construction site or the like after being manufactured in a factory or the like and wound on a drum or the like, or in a state of being wound in a bundle, and at the site or the like, the winding is unwound and the wire is extended. Laying is done.

As shown in FIG. 2, the tension member 2
Is a core part 7 made of JIS standard galvanized steel stranded wire (7 pieces / 1.2 mm), which is a conductive metal, and the outer periphery of the core part 7 is extruded and coated with plastic such as black PE or PVC. The outer diameter of the covering portion 8 is about 6 mm, and the thickness of the covering portion 8 is about 1 mm. The type and size of the tension member 2 may be changed according to the wire extension distance and the like. For example, the core wire portion 7 may be a single wire of galvanized steel. Returning to FIG. 1, this tension member 2 is suspended and supported from a suspension portion 9 provided on the shaft ceiling portion of the uppermost floor, and specifically, a suspension metal fitting 10 is provided on the ceiling portion. A suspension member 11 such as a winding grip and a pooling eye is locked to the suspension member 10.
The upper end of the tension member 2 is grasped to suspend and support the tension member 2.

As shown in FIG. 1, a distributor 4 is installed in the shaft on the uppermost floor, and a branching device 3 is installed and fixed to the tension member 2 on the floors below it. Conversely speaking, the interval between the distributor 4 and the branching device 3 is
It is made equal to the space between each floor during the manufacturing stage. In the illustrated example, the distributor 4 is divided into three, and the branching device 3 is divided into two, but it is possible to change the number of distributions / branches, or spare and maintenance management (level check) dummies.

3 and 4, the state in which the branching device 3 (or the distributor 4 may be used) is attached to the tension member 2 and the state where the trunk coaxial cable 5 and the branching coaxial cable 6 are attached to the branching device 3. And are drawn in detail. Note that the branching device 3 has four branches here.

The branching unit 3 is a popular type similar to the conventional one, in which a collar 13 is integrally formed on both sides of a metal main body 12, and the collar 13 is provided with four screw holes 14. There is.
A metal plate-shaped mounting member 15 is superposed on the back surface side of the branching device 3 with the tension member 2 interposed therebetween. Then, the mounting member 15 has a hole 16 according to the position of the hole 14 with a screw.
(Refer to FIGS. 12 and 13) and the mounting screw 17 has a hole 1
The branching device 3 is firmly fixed to the tension member 2 by being inserted into the screw 6 and tightened in the screwed hole 14. The mounting member 15 is provided with a semicircular groove portion 18 for accommodating the tension member 2, and the groove portion 18 substantially holds the tension member 2 together with the branch device 3.

In the branching device 3, a trunk coaxial cable 5 and a branching coaxial cable 6 are connected to each other at six connecting portions 19. Specifically, the connecting portion 19 is composed of a connector 20 attached to the connecting ends of the coaxial cables 5 and 6, and a connector portion 21 of the branching device 3 to which the connector 20 is attached. The upper and lower left connector parts 21 in the figure are input and output ends to which the trunk coaxial cable 5 is connected, and the remaining four connector parts 21 are branch ends to which the branching coaxial cable 6 is connected.

As shown in FIG. 5, the coaxial cable 5 (6)
Is an outer conductor 26 composed of an inner conductor (core wire) 22, an insulator 23, a double-sided aluminum foil-clad plastic tape 24 and a tin-plated annealed copper wire braid 25, and a PVC sheath (sheath) 27 from the center to the outer periphery. It is formed by sequentially stacking. Especially for the coaxial cable 5 for the trunk line, the cable type S-7C based on the Japan Cable Manufacturers Association standard (JCS standard)
-FB is a cable type S-5C-F for the branch coaxial cable 6.
Although B is used, cable types 7C-FB, 5C-FB, etc. for general television broadcasting or CATV may be used in addition to those for satellite broadcasting. In addition to the coaxial cables 5 and 6, the branching device 3 and the distributor 4 are also suitable parts according to the intended use, network configuration, level diagram, etc.
The material is selected.

FIG. 6 shows a connector 20 attached to these coaxial cables 5 and 6. The connector 20 has a body 28 having a substantially cylindrical shape, and a center contact 30 attached to the body 28 via an insulator 29. Center contact 30
And a connection nut 31 that is rotatably attached to the main body 28 so as to surround the. When the coaxial cables 5 and 6 that are stripped off and only the inner conductor 22 is projected are inserted into the main body 28, the insertion tube portion 32 is inserted between the insulator 23 and the coating 27 to connect with the outer conductor 26. At the same time, the inner conductor 22 is inserted into the hole 33 of the center contact 30 to be connected thereto. Then, after this, the ring member 3
2a is crushed on the cover 27 to fix the coaxial cables 5 and 6, and the mounting of the connector 20 is completed. Further, the connection nut 31 is screwed and fixed to the connector portion 21 of the branching device 3 to which the male screw is applied.
Center contact 30 in the contact insertion hole (not shown) of
Is inserted, whereby the connector 20 and the connector portion 2 are inserted.
1, the connection between the coaxial cables 5 and 6 and the branching device 3 is completed.

Further, as shown in FIG. 1, in the collective coaxial cable 1, the coaxial cables 5 and 6 are attached to the tension member 2 at a position close to the branching unit 3 and the distributor 4 and at an appropriate interval (0.5 to 3 m). A cable grip portion 34 for gripping is provided. As shown in FIG. 7, the cable grip portion 34 arranges the trunk coaxial cable 5 and the branching coaxial cable 6 (two in the illustrated example) side by side with the tension member 2 interposed therebetween, and these are bonded together. Heat shrinkable tube 36 with agent 35
It is configured collectively by. In addition to the heat-shrinkable tube 36, it may be integrally molded with plastic, rubber, or the like, or a fiber tape, a string, a binder, a strap, or the like may be used.

Further, as shown in FIG. 8, the branching device 3 (which may be the distributor 4) and the connecting portion 19 are integrally covered with a coating layer 37 having an appropriate thickness. The coating layer 37 is formed by dipping or applying a rubber compound,
Therefore, it can be easily removed by cutting with a cutter or the like. In addition to rubber type, silicon type, UV type, vinyl type, epoxy type and the like can be used.

The assembled coaxial cable 1 having such a structure is manufactured in a factory or the like, and then wound around a drum or the like and conveyed to a construction site. At this manufacturing stage, the length of the tension member 2 is adjusted to the height of the building or the shaft length, and the length of the trunk coaxial cable 5 is also between the distributor 4 on the top floor and the rooftop antenna (shown by 5a in FIG. 1). ), Or the distance between the branching device 3 and the distributor 4. Similarly, the length of the branch coaxial cable 6 is also adjusted to the distance based on the wiring route from each branching device 3 / distributor 4 to each room / dwelling unit. The trunk coaxial cable 5a and the branching coaxial cable 6 are easily gathered along the tension member 2 when wound around a drum or the like, because their tips are free ends.

The branching coaxial cable 6 connected to the distributor 4 on the top floor is a trunk line in actual handling, but here, in the sense that it is branched from the distributor 4, the branching coaxial cable 6 is convenient. 6 will be called.

The collective coaxial cable 1 transported to the construction site is unwound from the drum or the like, and the tension member 2 is lifted and sequentially sent to the upper floor to be extended in the vertical shaft. . After fixing the upper end of the tension member 2 as described above, the trunk coaxial cable 5 is extended to the amplifier, and the branch coaxial cable 6 is extended to each room / dwelling unit or another branching unit 3 / distributor 4. Lay.

As described above, since the branching device 3 / distributor 4 and the coaxial cables 5 and 6 are preliminarily connected, only the wire extension / laying work is required at the site, and the mounting of the storage box and the branching device,
Distributor installation is unnecessary. This makes it possible to omit complicated connection work, greatly simplify the work, and shorten the construction period. Since the connection can be made in a good environment such as a factory, it is possible to stably obtain a high level of quality. In addition, a cable rack and a storage box, which were required in the past, are no longer necessary, which enables space saving and cost saving.

Since the tension member 2 is provided,
It is not necessary to apply extra tension to the coaxial cable 5 that connects the branching unit 3 and the distributor 4 to each other, whereby disconnection of the coaxial cable 5 and disconnection of the connecting portion 19 can be prevented in advance. Since the tension member 2 is composed of the core wire portion 7 and the covering portion 8, it is possible to secure sufficient mechanical strength, prevent corrosion of the core wire portion 7, and prevent damage to the outside during installation. Furthermore, since a galvanized steel wire is used for the core wire portion 7, sufficient corrosion resistance and conductivity can be secured.

Since the coating layer 37 is provided, the branching device 3
It is possible to mechanically protect the distributor 4 and the connection portion 19 from an external impact, and also electrically protect them from a contact failure due to dust, moisture, humidity and the like. And the coating layer 37
Since it can be removed, it is possible to easily perform repairs, inspections, replacements and expansions after installation.

In addition, since the cable grip portion 34 is provided, the tension member 2 and the coaxial cable 5 can be prevented from unraveling and the handling can be simplified.

FIG. 9 is a view showing a collective coaxial cable installed in a middle-high-rise (13-story) building such as a condominium, and the symbols used in FIG. 9 are explained in FIG.
As shown in the figure, this collective coaxial cable 1a includes a booster 38 on the first floor and a trunk coaxial cable 5b (S-7C-FB).
The lower end, that is, the input end, is connected through one branching device, the coaxial cable 5b is connected to a four-way distributor 39, and from the four-way distributor 39, main trunk coaxial cables 5c ... It has been laid. The tension members are two (2a, 2b) extending to the 13th floor. One of the tension members 2a has the trunk coaxial cables 5c, 5d, and the other tension member 2b has the trunk coaxial cables 5c.
e and 5f are respectively along.

FIG. 11 shows an example of installation in a low-rise building such as an apartment or a hospital, and the symbols in the figure are as shown in FIG. In this case, the four tension members 2c ... 2f
Are laid horizontally on the second to fifth floors, and at the same time, the trunk coaxial cables 5g ... 5j are also laid horizontally so as to reach each dwelling unit or room.

Further, FIGS. 12 and 13 show modified examples of the mounting member 15, respectively. First, in the example of FIG. 12, the semicircular groove portion 18a of the attachment member 15a has a reduced diameter portion 40 formed by partially reducing the diameter of the central portion thereof. When the attachment member 15a is attached to the branching device 3 or the distributor 4, the coating 8 of the tension member 2 is partly stripped off, so that the exposed core portion 7 fits the reduced diameter portion 40. Contacted. Further, the core wire portion 7 of the tension member 2 is grounded (grounded) at another suitable position.

In this way, the branch member 3 and the distributor 4 can be collectively grounded while effectively using the tension member 2 as a ground wire. The covering portion 8 also fulfills the function of insulating the core wire portion 7. Then, the reduced diameter portion 40 enters the stripped portion of the covering portion 8 to cause the branching device 3
-The distributor 4 can be securely fixed without displacement.
Of course, since the covering portion 8 has a certain elasticity and is pressed by the branching device 3 and the distributor 4, even if there is no reduced diameter portion 40 due to the friction, there is no displacement.

Next, in the example of FIG. 13, the mounting member 15b
Has a semi-circular groove 18b partially recessed at its center to form a recess 41. Like the diameter-reduced portion 40, the recess 41 is also brought into contact with the exposed core portion 7 of the tension member 2 to enable the branching device 3 and the distributor 4 to be grounded.

As another method of performing this grounding, a grounding wire is separately provided and the branching unit 3 / distributor 4 and the tension member 2 are provided.
May be connected to the core wire portion 7.

[0040]

The present invention exhibits the following excellent effects.

(1) Wiring work can be greatly facilitated.

(2) A cable rack and the like can be omitted, and space and cost can be saved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a collective coaxial cable according to the present invention.

FIG. 2 is a cross-sectional view showing a tension member.

FIG. 3 is a plan view showing a mounting state of a branching device (distributor), a tension member, and a coaxial cable.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a perspective view showing a trunk cable and a branch coaxial cable.

FIG. 6 is a half sectional view showing a connector.

FIG. 7 is a cross-sectional view showing a cable grip portion.

FIG. 8 is a front view showing a coating layer.

FIG. 9 is a system diagram showing a modified example of the collective coaxial cable according to the present invention.

FIG. 10 is an explanatory diagram of symbols used in FIGS. 9 and 11.

FIG. 11 is a system diagram showing a modified example of the collective coaxial cable according to the present invention.

FIG. 12 shows a modified example of a mounting member, (a) is a front view,
(B) is a side view.

FIG. 13 is a perspective view showing a modified example of a mounting member.

FIG. 14 is a system diagram showing a conventional example.

[Explanation of symbols]

 1 Collective coaxial cable 2 Tension member 3 Divider 4 Distributor 5 Coaxial cable for trunk line 6 Coaxial cable for branch 7 Core part 8 Cover part 19 Connection part 37 Cover layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masao Otomo 880 Sunazawa-machi, Hitachi-shi, Ibaraki Hitachi Cable Assembly Co., Ltd.

Claims (4)

[Claims] 1. A tension member, a plurality of branching devices or distributors attached to the tensioning member at predetermined intervals, and a plurality of branching devices or distributors provided along the tension member to sequentially connect the branching devices or distribution devices. A collective coaxial cable comprising: a trunk coaxial cable; and a branching coaxial cable connected to the branching unit or the distributor and branched from the branching unit or distributor to have a predetermined length. 2. The assembly according to claim 1, wherein the tension member is composed of a core wire portion made of a galvanized steel single wire or stranded wire, and a covering portion made of PE, PVC or the like for covering an outer peripheral portion of the core wire portion. coaxial cable. 3. The collective coaxial cable according to claim 1, wherein the branching device or the distributor and the connecting portion between the branching device or the distributor and the trunk and branch coaxial cables are integrally covered with a removable coating layer. 4. The collective coaxial cable according to claim 1, wherein the tension member is made of a conductive metal and is grounded, and the branching unit or the distributor is electrically connected to the tensioning member.