JPH0644338U - TV co-listening coaxial branch cable and TV co-listening coaxial branch cable splitter - Google Patents

Abstract

(57) [Abstract] [Purpose] The coaxial cable for TV co-listening can be installed in a short period of time, and after the wiring is hoisted by a hoisting jig, the contact weight of the coaxial branch cable may cause a contact failure at the connection part of the branch device. Eliminate things like disconnection. [Structure] Equipped with a messenger wire for suspension on the coaxial cable, cut the coaxial cable at an appropriate point on the coaxial cable, insert and connect a branching device, and connect the coaxial cable of the required line to each branching device, This branch portion is resin-molded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a TV co-listening system that is installed in each door via a distributor, via an antenna, a mixer, a booster, etc., and in particular, a branch line is connected in advance from a coaxial trunk cable to a branch line by a branch device in a factory. The present invention relates to a coaxial branch cable for TV common listening manufactured by resin molding.

[0002]

[Prior art]

 In recent years, communications for high-speed data and television images have been developed in addition to communications in the voice region. In order to transmit multi-channel television signals, coaxial cables capable of transmitting up to VHF and UHF bands are required. . In addition, urbanization in the Tokyo metropolitan area is progressing rapidly, and there is a phenomenon of housing congestion in the city and its surroundings in order to build many houses in a limited land space. For this reason, high-rise condominiums have recently been constructed to make effective use of land.

In buildings such as high-rise condominiums, the TV antenna has a co-listening antenna installed on the roof, and a TV co-listening system is provided in which the co-listening antenna is distributed to each floor. Currently, the TV co-listening system mixes a VHF antenna 100 and a UHF antenna 110 with a mixer 120 and amplifies them with a VU booster 130, as shown in the system diagram of FIG. On the other hand, the signal input from the BS antenna 140 via the converter 150 is mixed and amplified with the UV signal output from the VU booster 130 in the BS booster 160 and sent to the distributor 170. In this distributor 170, the BS / UV signal divided into two is further divided into three in distributors 180 and 190 and sent to the series unit 200. This series unit 200 is the input terminal of each room. From this point onward, it is distributed according to the number of TV outlets in each room.

In order to draw the BS / UV signal output from the BS booster 160 into each house (each room), firstly, a pipe for inserting a TV co-listening coaxial cable is arranged on the outer wall, The method of inserting the coaxial cable for TV co-listening connected to the BS booster 160 inside this pipe and sending it to the series unit through the branching device on each floor by cable construction. Secondly, the pipe for arranging and storing the power cable. There is a method of using a shaft to send to the series unit via a branching device to each floor by cable construction via this pipe shaft.

[0005]

[Problems to be solved by the device]

 However, in the first method, since the pipe for the coaxial cable for TV common listening is laid on the outer wall, it takes a lot of time and labor for the plumbing work, and the pipe has a vertical cut (mounting hole). However, there is a problem in that the accuracy of the structure of the structure may be deteriorated due to the disposition. Furthermore, the first method has a problem in that it is difficult to maintain the wiring because it is difficult to maintain the wiring in the future because the wiring is run through each floor that has different ownership categories.

In the second method, since the coaxial cable for TV co-listening (TV coaxial trunk cable) is housed together with the power cable in the limited space of the pipe shaft, workability is poor. It has a problem that it is difficult to control the quality of coaxial cable for TV co-listening. Further, in the second method, the TV coaxial branch cable for branching is stored in the shaft provided on each floor, and the BS / UV signal is branched from the coaxial cable for TV common listening, so that the shaft on each floor is As shown in Fig. 6, a wall screw-fixed turnout is required, and the workability is poor because the turnout must be attached to the terminal board for storing the turnout for each floor.

In such installation of the coaxial cable for TV co-listening on the spot, workability is poor due to the work place and the like, so in recent years, as shown in FIG. A coaxial branch cable 300 has been devised in which a branching coaxial cable 320 having a length required for (a position corresponding to each floor of a building or the like) (a length sufficient for wiring to each floor) is connected together with a branching device 330. Figure 8 (a) shows a TV coaxial trunk cable connected to a TV branch coaxial cable via a branching device (indicated by a circle in the figure). Figure 8 (b) shows TV coaxial cable. Two TV coaxial branch cables were connected to the trunk cable via a branching device (indicated by a circle in the figure).

For such a conventional coaxial branch cable, a method of wiring using a pipe shaft for arranging and housing a power cable is adopted. Therefore, the coaxial branch cable is installed by launching the pipe shaft into the building and then bringing the coaxial branch cable to the site. This coaxial branch cable is hoisted by a hoisting jig and wired.However, the allowable tension of the coaxial branch cable itself is extremely weak, and after it is hoisted and wired by the hoisting jig, the weight of the coaxial branch cable is used to make the connection at the branch unit. There are problems such as poor contact and disconnection.

Further, as shown in FIG. 6, a conventional branching device is configured by dividing a TV coaxial trunk cable, inserting the TV coaxial trunk cables between the divided cables, and connecting the branch coaxial cables. . When the coaxial branch cable with this branch device attached is lifted by a lifting jig and wired, the dead weight of the coaxial branch cable is applied to the branch part to which the branch device is attached, causing poor contact at the branch device. It has the problem of being disconnected.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to lay a coaxial cable for TV co-listening in a short period of time and suspend it. An attempt is made to provide a highly reliable coaxial branch cable for TV common listening without causing contact failure or disconnection at the connection part of the branching device due to the weight of the coaxial branch cable after the wiring is hoisted by the upper jig. It is a thing.

Further, the present invention has been made in view of the above problems of the conventional technique, and its purpose is to hang up a coaxial branch cable by a hoisting jig and wire it. At this time, even if the weight of the coaxial branch cable is applied to the branch portion, the branch device for the coaxial branch cable for TV co-listening will not be applied to the coaxial branch cable connected to the branch device. .

[0012]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the coaxial branch cable for TV common listening according to the present invention has an inner conductor coated with an insulator, a braided outer conductor coated on the insulator, and the outer conductor of the outer conductor. A coaxial cable configured by covering a sheath on top is equipped with a messenger wire for suspension, and a branching device is interposed at an appropriate position of the coaxial cable, and a coaxial cable of a necessary line is connected to the branching device. The connection is made and the branched portion is molded by resin.

In order to achieve the above object, the coaxial branch cable for TV common listening according to the present invention has an inner conductor covered with an insulator, and a braided outer conductor covered with the insulator. Further, the coaxial cable constructed by covering the outer conductor with a sheath is equipped with a messenger wire for suspension, and a branching device is provided between the coaxial cable cut at an appropriate point and the coaxial cable cut with the messenger wire. Is connected, a coaxial branch cable of a necessary line is connected to the branching device, and both ends of the messenger wire that has been cut are attached to the messenger wire mounting portion of the branching device.

Further, in order to achieve the above object, the branch device for a coaxial branch cable for TV common listening according to the present invention electrically connects an inner conductor and an outer braided conductor of the coaxial cable to an input terminal of a branch iron core. An input side connector for connecting the coaxial cable to a case for accommodating a signal input from the coaxial cable to the output terminal of the branching iron core by resin-molding a connection portion for electrically connecting the plurality of coaxial branch cables. Provide an output side connector to connect the coaxial cable and a branch side connector to connect the coaxial branch cable, and attach messenger wires to both ends of the case where the input side connector is provided and the output side connector is provided. It is configured with a messenger wire mounting connector.

[0015]

[Action]

 Equipped with a messenger wire for suspension on the coaxial cable, cut the coaxial cable at appropriate points on the coaxial cable and insert and connect a branching device, and connect the coaxial cable of the required circuit to each branching device Since the parts are molded with resin, it is possible to lay the coaxial cable for TV common listening in a short period of time, and after the wiring is hoisted by the hoisting jig, the coaxial branch cable is contacted at the connection part of the branching device due to its own weight. It is possible to prevent the occurrence of defects and disconnection.

Further, the coaxial cable is equipped with a messenger wire for suspension, the coaxial cable and the messenger wire are cut at a branch point of the coaxial cable, and a branching device is connected between the cut coaxial cables to cut the same. Since both ends of the messenger wire are attached to the messenger wire attachment part of the branching device, it is possible to lay a coaxial cable for TV common listening in a short period of time, and after lifting wiring by a lifting jig, coaxial branch It is possible to prevent a contact failure or disconnection at the connection part of the branching device due to the weight of the cable.

In addition, the inner conductor and the outer braided conductor of the coaxial cable are electrically connected to the input terminal of the branching iron core, and a signal input from the coaxial cable to the output terminal of the branching iron core is connected to the plurality of coaxial branching cables. An input side connector for connecting the coaxial trunk cable, an output side connector for connecting the coaxial trunk cable, and a branch side connector for connecting the coaxial branch cable are included in the case where the connection part to be electrically connected is stored by resin molding. Since the messenger wire attachment connectors are installed at both ends of the case where the input side connector is provided and the output side connector is provided, the coaxial branch cable is suspended. When the cable is hung by an upper jig and wired, the dead weight of the coaxial branch cable is applied to the case of the branch device. It is supported by the changer wire and can prevent the coaxial branch cable from hanging on the connection part with the branching device.

[0018]

【Example】

 Embodiments of the present invention will be described below. FIG. 1 shows a first embodiment of a coaxial branch cable for TV common listening according to the present invention.

In the figure, 1 is a coaxial branch cable for TV co-listening, which is branched in advance to a location where a TV coaxial trunk cable is required (a position corresponding to each floor of a building, etc.) in a factory so that wiring installation work can be performed easily. Attach a branch cable and connect a branching coaxial cable of the required length (long enough to be distributed to each floor) to the BS / UV signal supplied to the TV coaxial trunk cable. It is designed to be able to demultiplex with a minimum reduction.

Reference numeral 2 denotes a TV coaxial trunk cable, which has a configuration as shown in FIG. That is, the TV coaxial trunk cable 2 is composed of the coaxial cable 3 and the messenger wire 4. The coaxial cable 3 has an inner conductor 31 composed of a single wire at the center. The inner conductor 31 is made of, for example, annealed copper wire and has a solid structure. An insulator 32 is coated on the inner conductor 31, and the insulator 32 is made of PE (polyethylene) resin. An aluminum tape 33 is wound on the insulator 32, and a braid (single, double, triple, etc.) outer conductor 34 is coated on the aluminum tape 33. The outer conductor 34 is covered with a sheath 35. The sheath 35 is made of PVC (polyvinyl chloride).

The messenger wire 4 is for suspending and supporting the coaxial cable 3, and the coaxial cable 3 constitutes a self-supporting type cable. Reference numeral 41 is a support wire, which is made of galvanized steel wire. An insulating material 42 covers the supporting wire 41. Like the sheath 35 of the coaxial cable 3, the insulating material 42 is made of PVC (polyvinyl chloride) and is integrally molded with the sheath 35 of the coaxial cable 3. That is, the insulating material 42 is extruded at the same time as the sheath 35 covering the outer conductor 34 of the coaxial cable 3 and the outer conductor 34 and the support wire 41 are integrally formed.

Reference numeral 5 denotes a branching device, which is provided at an appropriate position of the coaxial cable 3 (a position corresponding to each floor of a building or the like). The branching device 5 has a demultiplexing circuit for demultiplexing the BS / UV signal from the coaxial cable 3 housed in a case 51, and is entirely resin-molded. Reference numeral 52 denotes an input side connector, to which the end of one of the cut coaxial cables 3 is connected. An output side connector 53 is connected to the end of the other coaxial cable 3 that has been cut. Reference numeral 54 denotes a branch side connector, to which the coaxial branch cable 6 for transmitting the BS / UV signal demultiplexed from the coaxial cable 3 is connected.

In this embodiment, when the branching device 5 is attached to the TV coaxial trunk cable 2 and branched, only the coaxial cable 3 is cut and attached without cutting the messenger wire 4. Therefore, the messenger wire 4 is not cut and remains as it is, and acts as a support wire.

Therefore, according to the present embodiment, the branch device 5 previously branches the coaxial cable 3 of the TV coaxial trunk cable 2 into a plurality (two lines in the present embodiment) of the coaxial cable 3 and the coaxial branch cable 6 is connected to the TV. Since the audio coaxial branch cable 1 is configured, it is easy to install it, and it is possible to reduce on-site work. By integrating it with other wiring work (wiring for power cables, etc.) Labor saving can be achieved.

Further, according to the present embodiment, since the messenger wire 4 is not cut, the coaxial branch cable 1 for TV common listening does not have its own weight applied to the connecting portion of the coaxial cable 3 and the branching device 5 and is connected. There is no contact failure or disconnection at the parts.

FIG. 2 shows a second embodiment of the TV coaxial listening coaxial branch cable and a first embodiment of the TV coaxial listening branch cable according to the present invention.

In the figure, the difference from the embodiment shown in FIG. 1 is that branching device 5 is provided with messenger wire attachment connectors 55 and 56, and branching device 5 is attached to TV coaxial trunk cable 2 for branching. At this time, when the coaxial cable 3 is cut, the messenger wire 4 is also cut together, one of the cut messenger wires 4 is connected to the messenger wire mounting connector 55, and the other cut messenger wire 4 is mounted as the messenger wire. It is connected to the connector 56 for use. Other than that, there is no difference from the embodiment shown in FIG.

In the present embodiment, the case 51 of the branching device 5 has sufficient strength to withstand the suspension tension of the coaxial branch cable 1 for TV common listening. Further, the weight of the coaxial branch cable 1 for TV co-listening can be reliably received by the messenger wire 4, and the coaxial cable 3 can be made longer.

Therefore, according to this embodiment, the branching device can be downsized, the installation to the pipe shaft can be facilitated, and the connection between the branching device and the coaxial cable can be easily removed by the connector. Therefore, even if a problem occurs at the branch portion, it can be easily replaced.

FIG. 3 shows a second embodiment of a branching device for a TV co-listening coaxial branch cable according to the present invention.

In the figure, the difference from the embodiment shown in FIG. 2 is that the embodiment shown in FIG. 2 is provided with the messenger wire attachment connectors 55 and 56 on the branching device 5, whereas this embodiment is provided with a coaxial branch. A messenger wire 7 is provided on the cable 6, a hook 71 is provided at the tip of the messenger wire 7, hooks 43 and 44 are further provided at the front end of the messenger wire 4, and a hook 71 of the messenger wire 7 is provided at the branching device 5. The point is that crowns 57, 58 and 59 for attaching the hooks 43 and 44 of the messenger wire 4 are provided.

In the present embodiment, the case 51 of the branching device 5 has sufficient strength to withstand the suspension tension of the coaxial branch cable 1 for TV common listening. Further, the weight of the coaxial branch cable 1 for TV co-listening can be reliably received by the messenger wire 4, and the coaxial cable 3 can be made longer.

Therefore, according to the present embodiment, the branching device can be downsized, the installation to the pipe shaft can be facilitated, and the connection between the branching device and the coaxial cable can be easily removed by the connector. Therefore, even if a problem occurs at the branch portion, it can be easily replaced.

[0034]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

In the coaxial branch cable for TV common listening according to claim 1, the coaxial cable is equipped with a messenger wire for suspension, the coaxial cable is cut at an appropriate position of the coaxial cable, and a branching device is inserted and connected. Since the coaxial cable of the required line is connected to the branch switch of this, and this branch part is configured by resin molding, the construction work of the coaxial cable for TV common listening can be done in a short period, and it can be lifted by the lifting jig. After wiring, it is possible to prevent contact failure or disconnection at the connection part of the branch device due to the weight of the coaxial branch cable.

In the coaxial branch cable for TV common listening according to claim 2, the coaxial cable is equipped with a messenger wire for suspension, the coaxial cable and the messenger wire are cut at a branch point of the coaxial cable, and the cut coaxial Since a branch device is connected between the cables and both ends of the cut messenger wire are attached to the messenger wire mounting part of the branch device, it is possible to construct a coaxial cable for TV common listening in a short period of time. After the wiring is hoisted by the hoisting jig, it is possible to prevent contact failure or disconnection at the connection part of the branch device due to the weight of the coaxial branch cable.

In the branch device for coaxial branch cable for TV common listening according to claim 3, the inner conductor and the outer braided conductor of the coaxial cable are electrically connected to the input terminal of the branching iron core, and the branching iron core Connect the input side connector that connects the coaxial trunk cable and the coaxial trunk cable to the case where the connection part that electrically connects the multiple coaxial branch cables to the signal input from the coaxial cable to the output terminal is molded with resin. The output side connector and the branch side connector for connecting the coaxial branch cable are provided, and the messenger wire attachment connector that attaches the messenger wires to both ends of the case where the input side connector is provided and the output side connector is provided Since a coaxial branch cable is installed by using a hoisting jig, the same It is possible to prevent the self-weight of the axial branch cable from being hung on the case of the branch device and supported by the messenger wire, and being hung on the connection part of the coaxial branch cable with the branch device.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of a coaxial branch cable for TV common listening according to the present invention.

FIG. 2 is a plan view showing a second embodiment of the coaxial branch cable for TV common listening and a first embodiment of the branch device for coaxial branch cable for TV common listening according to the present invention.

FIG. 3 is a plan view showing a second embodiment of a branching device for a coaxial branch cable for TV common listening according to the present invention.

FIG. 4 is an overall cross-sectional view of a part of a coaxial cable with a messenger wire applied to the present invention.

FIG. 5 is a system diagram of a TV co-listening system.

FIG. 6 is an overall perspective view of a conventional branching device.

FIG. 7 is a sectional view of a branch portion of a conventional coaxial branch cable.

FIG. 8 is a schematic diagram showing an example of branching by the coaxial branch cable shown in FIG.

[Explanation of symbols]

1 …………………………………………………… Coaxial branch cable for TV co-listening 2 ……………………………………………… TV coaxial trunk cable 3 …… …………………………………………… Coaxial cable 31 ………………………………………… Inner conductor 32 ………………………………… Insulator 34 ………………………………………… Outer conductor 35 ………………………………………… Sheath 4,7 ……………… ……………………………… Messenger wire 41 ………………………………………… Support wire 42 …………………………………… Insulation material 43,44 …………………………………… Hook 5 ……………………………………………… Branch switch 51 ……………………………… ………… Case 52 ………………………………………… Input side connector 53 ……………………………………………… Output side connector 54 ………………………………………… Branch side connector 55, 56 ………………………… ……………… Messenger wire mounting connector 57, 58, 59 ………………………… Crown 6 …………………………………………… Coaxial branch cable 7… ……………………………………………… Messenger wire 71 ………………………………………… Hook

Front page continuation (72) Kenzo Uesugi Kenzo Uesugi 2771 Ooka, Numazu-shi, Shizuoka Yazaki Electric Wire Co., Ltd. (72) Masayoshi Ishiguro 1-18-22 Nishiki, Naka-ku, Nagoya-shi, Aichi Stock company Takenaka Corporation (72) ) Inventor Nobuhiko Kondo 1-18-22 Nishiki, Naka-ku, Nagoya-shi, Aichi Stock company Takenaka Corporation (72) Inventor Daisuke Irie 1-18-22 Nishiki, Naka-ku, Nagoya-shi Aichi Prefecture Takenaka Corporation

Claims (3)

[Scope of utility model registration request] 1. A coaxial cable comprising an inner conductor coated with an insulator, a braided outer conductor coated on the insulator, and a sheath coated on the outer conductor. A coaxial branch for TV common listening, which is equipped with a messenger wire for use with a coaxial cable, has a branching device at an appropriate location of the coaxial cable, connects the coaxial cable of a necessary line to the branching device, and molds the branching part with resin. cable. 2. A coaxial cable constructed by covering an inner conductor with an insulator, covering the insulator with a braided outer conductor, and further covering the outer conductor with a sheath. Equipped with a messenger wire for use, connect a branching device between the coaxial cable cut at an appropriate point and the coaxial cable cut off of the messenger wire, and connect the branching device with a coaxial branching cable of a necessary line to perform the cutting. A coaxial branch cable for TV common listening in which both ends of the messenger wire are attached to the messenger wire attachment portions of the branching device. 3. An inner conductor and an outer braided conductor of a coaxial cable are electrically connected to an input terminal of a branching iron core, and a signal input from the coaxial cable to an output terminal of the branching iron core is electrically connected to a plurality of coaxial branch cables. In the case that stores the connection part to be electrically connected by resin molding, the input side connector for connecting the coaxial cable, the output side connector for connecting the coaxial cable, and the branch side connector for connecting the coaxial branch cable are provided. A branch device for a TV co-listening coaxial branch cable, in which messenger wire attachment connectors for attaching messenger wires are provided at both ends of the side where the input side connector is provided and the side where the output side connector is provided.