JP4079242B2 - Protection device for transceiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protection device for a transceiver that is connected to a transceiver portion in a LAN or other communication line and protects the transceiver from lightning surges that have entered a communication cable.
[0002]
[Prior art]
In LANs such as Ethernet, it was necessary to attach a protector to the cable closest to the transceiver in order to protect the transceiver from lightning surges. When connecting a protector to a cable, since the normal cable is a coaxial cable, a method is adopted in which a protector having coaxial connectors at both ends is mounted in the cable.
[0003]
[Problems to be solved by the invention]
However, in the above-described method, it is necessary to attach a coaxial connector to the cable at the position where the protector is attached, and the work for that purpose is cumbersome and inefficient, and improvement in workability when connecting the protective device is desired. It was.
[0004]
[Means for Solving the Problems]
To solve the above problems, a first aspect of the invention,
A coaxial tap having a jack disposed proximate to the coaxial cable to which the transceiver is connected and electrically connected to a core wire in the coaxial cable;
A protector body having a plug connected to the jack of the coaxial tap and a ground terminal;
A ground wire connected to the earth terminal of the protector body and the housing of the transceiver;
A protection device for a transceiver comprising:
The coaxial tap is
An upper case having a groove in which the coaxial cable is disposed, a needle formed in the groove, a hole formed outside the groove, and a guide protrusion formed outside the groove;
A lower case having a groove in which the coaxial cable is disposed, a screw hole formed in the groove, and a hole formed outside the groove;
A jack having a pointed tip and a threaded portion for screwing into a screw hole of the lower case;
With
The protrusion formed outside the groove of the upper case is guided by the hole formed outside the groove of the lower case, and the screw inserted through the hole formed outside the groove of the upper case is outside the groove of the lower case. The upper case and the lower case are fixed by fastening with a screw hole to be formed, and the jack is screwed into the coaxial cable fixed while being electrically connected by the needle of the upper case. tip is pressed against the core wires which was characterized that you electrically connected.
[0005]
The invention of claim 2 is the invention of claim 1 ,
It has a drilling tool for screwing into the screw hole of the lower case,
Instead of the jack, a drilling jig is screwed into the screw hole of the lower case, and the core wire portion of the coaxial cable is drilled .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing a state in which the present invention is attached to a communication cable. In the figure, reference numeral 1 denotes a coaxial cable to which a transceiver 2 is connected. A coaxial tap 3 is attached to the coaxial cable 1 in the immediate vicinity of the transceiver 2. A BNC connector jack 4 projects from the lower portion of the coaxial tap 3, and this jack 4 is inserted into and connected to a BNC connector plug 6 projecting from the upper portion of the protector body 5.
[0007]
A ground terminal 7 projects from the lower part of the protector body 5 and is connected to a ground bus via a wiring 8. A wiring 10 is connected between the ground terminal 7 and the housing 9 of the transceiver 2. In addition, this wiring 10 can also be connected to the metal fitting 11 of the D-SUB connector provided at the right end of the housing 9 as indicated by a broken line in the drawing. Reference numeral 12 in the figure denotes a transceiver cable connected to the D-SUB connector.
[0008]
FIG. 2 is an exploded perspective view showing a procedure when the coaxial tap 3 is attached to the coaxial cable 1. The coaxial tap 3 has a split structure, and is divided into an upper case 3A and a lower case 3B by removing the screws 13 and 14. The coaxial cable 1 is sandwiched between the grooves 15 and 16 formed on both split surfaces, and the screws 13 and 14 are tightened, whereby the needle 17 projecting in the groove 15 of the upper case 3A (shown in FIG. 3). ) Bites into the jacket portion of the coaxial cable 1, and the outer conductor of the coaxial cable 1 and the coaxial tap 3 are electrically connected.
[0009]
On the other hand, a screw hole 18 is formed in the middle position of the groove 16 of the lower case 3B perpendicularly to the joint surface with the upper case 3A. First, a drilling jig 19 is screwed into the screw hole 18 to be coaxial. Drill to the core of cable 1. Next, the jig 19 is removed and the signal probe 20 is newly screwed. Thereby, the tip 21 of the probe 20 is pressed against the core wire of the coaxial cable 1.
[0010]
The tip 21 is insulated and supported by the main body portion of the probe 20, and the other end serves as the central conductor of the jack 4.
In addition, protrusions 22 and 23 are provided at both ends of the dividing surface of the upper case 3A, and these are fitted into holes 24 and 25 formed at the same position of the lower case 3B. Positioning is performed when 3A and the lower case 3B are combined.
[0011]
FIG. 3 is an external view of a state in which the coaxial tap 3 and the protector main body 5 are connected and integrated by a connector portion, where FIG. 3A is a top view, FIG. 3B is a front view, and FIG. It is a side view.
[0012]
FIG. 4 is a circuit diagram of the protector body 5. The diode stacks D1 to D4 and the silicon varistors NR1 and NR2 are connected in parallel between the center conductor 26 and the outer conductor 27 of the coaxial tap 3, and further, the arrester is disposed between the outer conductor 27 and the ground terminal E. Arr and the varistor Var are connected in parallel.
[0013]
【The invention's effect】
As described above, according to the present invention, a coaxial tap that can be freely attached to and detached from the protector using a connector is used to connect the protector and the coaxial cable, thereby facilitating the installation work of the protector and greatly improving the work efficiency. Can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a state in which the present invention is attached to a communication cable.
FIG. 2 is an exploded perspective view showing a procedure when a coaxial tap is attached to a coaxial cable.
FIG. 3 is an external view of a state where a coaxial tap and a protector body are connected and integrated.
FIG. 4 is a circuit diagram of a protector main body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coaxial cable 2 Transceiver 3 Coaxial tap 3A Upper case 3B Lower case 4 Jack 5 Guard body 6 Plug 7 Ground terminal 8 Wiring 9 Case 10 Wiring 11 Connector metal fitting 12 Transceiver cable 13, 14 Screw 15, 16 Groove 17 Needle 18 Screw Hole 19 Drilling jig 20 Signal probe 21 Tip 22, 23 Projection 24, 25 Hole

Claims (2)

A coaxial tap having a jack disposed proximate to the coaxial cable to which the transceiver is connected and electrically connected to a core wire in the coaxial cable;
A protector body having a plug connected to the jack of the coaxial tap and a ground terminal;
A ground wire connected to the earth terminal of the protector body and the housing of the transceiver;
A protection device for a transceiver comprising:
The coaxial tap is
An upper case having a groove in which the coaxial cable is disposed, a needle formed in the groove, a hole formed outside the groove, and a guide protrusion formed outside the groove;
A lower case having a groove in which the coaxial cable is disposed, a screw hole formed in the groove, and a hole formed outside the groove;
A jack having a pointed tip and a threaded portion for screwing into a screw hole of the lower case;
With
The protrusion formed outside the groove of the upper case is guided by the hole formed outside the groove of the lower case, and the screw inserted through the hole formed outside the groove of the upper case is outside the groove of the lower case. The upper case and the lower case are fixed by fastening with a screw hole to be formed, and the jack is screwed into the coaxial cable fixed while being electrically connected by the needle of the upper case. transceiver protection apparatus characterized by pressure that you electrically connect the core wire to the tip. The protection device for a transceiver according to claim 1 ,
It has a drilling tool for screwing into the screw hole of the lower case,
A transceiver protection device, wherein a drilling jig is screwed into a screw hole of a lower case instead of the jack, and a core wire portion of a coaxial cable is drilled .

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