JP2003337154A - Cable conductor change-over test apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable conductor change-over test apparatus which can realize remarkable simplification and speed-up of a conductor change-over test before and after change-over of a cable. <P>SOLUTION: The test apparatus consists of two conductor connection terminals T1, T2, one search line connection terminal ST, two external terminals TM1, TM2 for connecting an electric continuity tester (analog tester), two external terminals TM3, TM4 for connecting a conductor resistance measuring apparatus (digital tester), two external terminals TM5, TM6 for connecting an insulation resistance meter, one external terminal 7 for ground connection, and a rotary switch RSW having three circuits and nine contacts. Conductor L1, L2 are connected with the two conductor connection terminals T1, T2. The search line is connected with the search line connection terminal ST. By switching the rotary switch RSW, an electric continuity test, a conductor resistance test and an insulation resistance test are enabled in order. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core for a continuity test of an existing cable core wire (line), which is carried out in switching (updating) of communication cables such as switching between stations of a communication cable (signal cable) or intermediate switching. Cable core switching test suitable for cable core switching (confirmation test or confirmation test), continuity test of new cable core (core verification), conductor resistance test, insulation resistance test, etc. Regarding the device.

[0002]

2. Description of the Related Art Heretofore, there has not been a cable core wire switching test device used for switching a communication cable based on its service life. For this reason, the conventional switching (updating) work based on the life of the communication cable is performed as follows. This will be described with reference to FIG. For example, regarding a communication cable 50P that connects between a railway station C station (hereinafter, C equipment room (wiring board) or simply C) and D station (hereinafter, D equipment room (wiring board) or simply D), The case where the existing cable P1 between the A connection point (hereinafter, referred to as A) and the B connection point (hereinafter, referred to as B) in the middle is switched (replaced) to the new cable P2 will be described.

At the time of this switching, A, B,
Workers are respectively placed at points C and D (locations), and after the call test, pre-switching work such as confirmation of the sag line is performed in advance. The pre-switching work and preparation details at points A, B, C, and D are as follows. However, the C equipment room is on the measurement (test confirmation) side, and the D equipment room is evicted (wire number confirmation).
To the side. In addition, in progress of the work, after using the meeting line between the arranged workers, after the call test,
Conduct while confirming the work contents.

(Pre-switching work at points A and B, contents of preparation) Call test: A monitor and headphones are connected to the meeting line to perform a call test with other points. Confirmation test of the countersunk wire: (-) of analog tester AT
The side test rod is connected to a countersunk wire (50L2) which is predetermined between workers by a clip or the like. And
A check test is performed on the counterbore line between points A and D and between points B and D to prepare for switching. It should be noted that this sagging wire confirmation test is carried out by using other predetermined unused wires (for example, monitor lines) and bringing the (+) side terminal of the analog tester AT into contact therewith. However, at this time, at the point D (discharging side), as will be described later, a loop is formed between the sag line and another unused line (for example, a monitor line) to establish conduction.

(Pre-switching work at point C (measurement side), contents of preparation) Call test: A monitor and headphones are connected to the meeting line to perform a call test with other points. Confirmation test of the countersunk wire: The (-) side test rod of the analog tester AT for the continuity test is connected with a clip or the like to the terminal of the countersunk wire (50L2) which is predetermined between workers. Then, between the points C and D, a check test of the countersunk line is performed to prepare for switching. In this verification test of the countersunk wire, the point of using the terminal of another unused wire which is determined in advance is the same as the contents at the points A and B. After switching to the new cable, prepare a digital tester to measure the conductor resistance and an insulation resistance meter to measure the insulation resistance.

(Work at D Point (Exit Side), Contents of Preparation) Call Test: A monitor and headphones are connected to the meeting line to perform a call test with other points. Confirmation test of the countersunk wire: One of the clip codes for the countersunk wire (hereinafter, also referred to as a clip code) SC is connected to a predetermined countersunk wire (50L2) terminal, and a confirmation test of the countersunk wire with each point is performed. In the verification test of the sag wire with each point, the other end of the clip cord is brought into contact with the terminal of another unused wire which is predetermined.

As described above, the work before switching at each point,
Make preparations (such as checking the line). After performing the pre-switching work and preparation, the switching work is performed as follows.

(Switching work) The cables are opened at the core wire dividing terminals (wiring terminals) of the switching lines at the points C and D, respectively, so that no load is applied and no voltage is applied. At the point C, the negative test rod of the analog tester AT is a counterbore line (50L2).
It is connected to the terminal of. Further, at the point D, one terminal of the clip cord SC is connected to the terminal of the countersunk wire (50L2). Confirmation of the wire numbers and 1L1 and 1L2 of the existing cable cores to be switched between the C equipment room and the D equipment room (conductor continuity test) is carried out while the workers at the C and D points meet. The worker at the point D contacts the other terminal of the clip code SC of the countersunk wire with the terminal (1L1) of the corresponding wire number. On the other hand, the worker at the point C contacts the + side test rod of the analog tester AT with the terminal (1L1) of the corresponding wire number. Then, a core wire confirmation test (continuity test) is performed. This confirmation is
By observing the deflection of the needle of the analog tester AT at point C. Next, for the other cable core wire 1L2 forming a pair, a continuity test between C and D is similarly performed. Next, between A and D, the cable core wire number and 1L1,
Check 1L2 (conductivity test of core wire). For the work at the point A, the + side test rod of the analog tester AT is brought into contact with the core wire (1L1) of the corresponding wire number to confirm the continuity. At the time of this confirmation, the worker at the point D makes the clip cord S
The other terminal of C is brought into contact with the terminal (1L1) of the corresponding wire number.
Next, the continuity test between A and D is similarly performed on the other pair of cable core wires 1L2. And between B and D, the cable core wire number and 1L
Check 1 and 1L2 (conductor core continuity test). For the work at the point B, the + side test rod of the analog tester AT is brought into contact with the core wire (1L1) of the corresponding wire number to confirm the continuity. At the time of this confirmation as well, the worker at the point D changes the other terminal of the clip cord SC of the countersunk wire to the terminal (1L
Contact 1). Next, the other pair of cable cores 1L
For No. 2, the continuity test between B and D is similarly performed. An existing cable (1L) tested for continuity at points A and B
Cut between 1 and 1L2 A and B). Discard the cut cables (1L1, 1L2) between A and B. Then, between the end of the portion near the C point and the end of the portion near the D point to be left, a new cable (1L1, 1L) is
2) is arranged, connected to each end of each core wire, and switched to the new cable P2.

After the existing cable P1 is switched to the new cable P2 in this way, the core wire (1L) of the new cable is
1, 1L2), a continuity test, a conductor resistance test, and an insulation resistance test are carried out one after another. The work procedure after the switching is as follows.

(Continuity test) Between the C and D equipment rooms, the cable core wire number and 1
Check L1 and 1L2. The worker at the point D attaches the other terminal of the clip wire SC of the countersunk wire to the terminal (1
Abut L1). On the other hand, the operator at the point C attaches the + side test rod of the analog tester AT to the terminal (1L) of the corresponding wire number.
Contact 1). And confirmation test of core wire (continuity test)
do. After that, the continuity test is similarly performed for 1L2. (Conductor resistance measurement test) Conductor resistance is measured between C and D. The worker at the point D contacts the terminals of the clip cord SC with the terminals of the corresponding wire numbers 1L1 and 1L2. On the other hand, the operator at the point C attaches the + and-terminals of the digital tester (not shown) to the corresponding wire number 1L.
It contacts with each terminal of 1 and 1L2. And 1L1, 1L
Read and record the conductor resistance value of 2. (Measurement of Insulation Resistance) At the C point (the worker at the C point), the insulation resistance between 1L1-E (ground), 1L2-E, and 1L1-1L2 is measured. The insulation resistance between 1L1-E is not shown,
Connect the earth cord of the insulation resistance tester to the earth terminal of the C equipment room, and touch the line cord to 1L1 of the corresponding terminal to
Record the resistance between 1 and E. For the insulation resistance between 1L2-E, connect the earth cord of the insulation resistance meter to the earth terminal of the C equipment room, and contact the line cord with 1L2 of the corresponding terminal,
Record the resistance between 1L2-E. For the insulation resistance between 1L1-1L2, use the earth code of the insulation resistance tester and
The line code is brought into contact with L1 and the line code is brought into contact with 1L2 of the corresponding terminal, and the resistance value between 1L1-1L2 is recorded.

After measuring the insulation resistance at the point C, attach the grounding clip cord to the corresponding wire number terminals 1L1 and 1L1.
By contacting each of L2, the electric charge charged in the core wire is released to the ground. At points C and D, the separated terminals are returned to the original state, and a test is performed between the connected communication devices to confirm normality. Thus, the switching work for one line (1L1, 1L2) and the continuity test after the switching work, the conductor resistance measurement test, the insulation resistance measurement, and the like are completed. After that, the number of cable lines (from 2L1, 2L2 to the cable wire number of the switching target,
For example, up to 50L1 and 50L2), the confirmation test (continuity test) of the core wire of the existing cable and the continuity test of the core wire of the new cable are sequentially performed as described above.

[0012]

Thus, in the conventional cable switching work, the continuity test (confirmation test) of the core of the existing cable P1 and the continuity test of the core of the new cable P2 are performed. It was necessary, and the cable switching work was extremely complicated, especially at points C and D. That is, the operator at the point C for each core wire or one core wire forming a pair of cables contacts or separates each terminal of each test equipment (analog tester AT, etc.) from each terminal of the C equipment room. Must be repeated.
Further, the worker at the point D also obtains the continuity required for the test between the terminals of the D equipment room in the continuity test before the switching work, the continuity test after the switching work, and the conductor resistance test.
It is necessary to repeat contact and separation of the terminals of the clip cord SC with the respective terminals.

As described above, in the conventional cable switching work, before and after the switching work, the workers in both the C and D equipment rooms frequently contact each test equipment in correspondence with each test. The work was considered to be extremely troublesome because the lead terminals and clip cord terminals had to repeatedly contact and separate the wiring terminals. In addition, since it is necessary to switch the communication cables within a limited time without error, it has been a very laborious task for each worker.

In addition, the number of cable core wires may reach several tens or even hundreds or more. In that case, the wiring terminals of that number are arranged in tandem in both the C and D equipment rooms.
On the other hand, in the operator, contact the lead terminal of the test equipment and the terminal of the clip cord to the wiring terminal in the equipment room,
When the separation is repeated, the wiring terminals to be brought into contact with each other, that is, the terminals located next to the wiring terminals already made contact, are visually checked. For this reason, it is easy to cause a sensation such as skipping a tested or untested one, or an untested one that should be tested, between wiring terminals that do not differ in appearance. Sometimes occurs, which hinders the smooth progress of work.
As a result, in the conventional cable switching, such as repeated erroneous and wasteful work, the work time is lengthened and the work cost is increased.

The present invention has been made in view of these problems, and a cable core wire switching test capable of significantly simplifying and speeding up a cable core wire switching test before and after such a conventional cable switching is performed. The purpose is to provide a device.

[0016]

A cable core switching test apparatus according to claim 1 for achieving the above object comprises a pair of cores (L1, L2) of a cable to be tested.
2 core wire connection terminals (T1, T2) that can be connected to
One sag wire connection terminal (ST), two external terminals (TM1, TM2) for continuity tester connection, two external terminals (TM3, TM4) for conductor resistance measurement device connection, and insulation resistance meter connection Two external terminals (TM5, TM6) and one external terminal for ground connection (TM7)
And a circuit connecting the sag wire connection terminal (ST) and one of the external terminals (TM1) for connecting the continuity tester, and three circuits each having at least 9 contacts. Third circuit selector (RSW1, RSW2, RSW)
Test item changeover switch (R) having a configuration in which all of 3) move at the same time and each contact in the three circuits changes at the same time.
SW), a circuit connecting the terminal of the first circuit selector (RSW1) of the test item changeover switch (RSW) and one of the two core wire connection terminals (T1), and the test item changeover switch (RSW) second circuit selector (R
SW2) terminal and the other of the two core wire connection terminals (T2) are connected to each other, a third circuit selector (RSW3) terminal of the test item changeover switch (RSW) and the ground connection A circuit connected to an external terminal (TM7), and the two external terminals (TM
1, TM2) to each terminal of the continuity tester, the two external terminals (TM3 and TM4) to each terminal of the conductor resistance measuring instrument, and the two external terminals (TM5 and TM6) to the insulation resistance. In addition to connecting each terminal of the meter, the one external terminal (TM7) for ground connection is connected to the ground, the counterbore wire is connected to the counterbore wire connection terminal (ST), and the two core wire connection terminals ( When the core wires (L1, L2) of the cable to be tested are connected to (T1, T2), the contacts of the three circuits of the test item changeover switch (RSW) are switched at the same time, and the following items (1) to (4) correspond to the ejection side By turning on the conductor, the circuit is turned off, the circuit for conducting the continuity test of the core wire L1-the counter wire, the circuit for conducting the continuity test of the conductor wire L2-the counter wire, and the conductor resistance measurement test for the conductor wires L1-L2. For the insulation resistance test between the core wire L1 and the ground, a circuit for an insulation resistance test between the core wire L2 and the ground, and a circuit for an insulation resistance test between the core wires L1 and L2. After the insulation resistance test of any one of (1) to (4) above, before switching to the circuit of (1), a circuit for releasing the electric charge charged in the core wire to the ground in the insulation resistance test is constructed. , 9 contacts that simultaneously switch with the 3 circuits of the test item changeover switch (RSW) are used, and each contact is opened or external terminals (TM2 to TM2) are used.
This is a cable core wire switching test device having a configuration in which any one of TM6) is connected by wiring.

According to the cable core wire switching test apparatus of the present invention, since it has the above-mentioned structure, it is arranged on the measurement side when switching the cable. Then, each terminal of the continuity tester is connected to the two external terminals TM1 and TM2, each terminal of the conductor resistance measuring instrument is connected to the two external terminals TM3 and TM4, and the other two external terminals TM5 and TM6 are insulated. Each terminal of the ohmmeter is connected, one external terminal TM7 for ground connection is connected to the ground, and the counterbore wire is connected to the counterbore wire connection terminal ST. Here, it is preferable to use an analog tester for the continuity tester and a digital tester for the conductor resistance measuring device, but it is also possible to use the conductor resistance measuring device for the continuity testing device. And
The core wires L1 and L2 forming a pair to be switched are connected to the two core wire connection terminals T1 and T2, respectively. Then,
In the case of using at the above-mentioned C point, in the above items 1 to 4, the test item changeover switch RSW is provided at the C point in accordance with the conducting side corresponding to the test on the ejection side (D point).
The test circuits different from the above are formed only by switching the above. Therefore, the two core wires L1 and L2 can be simply
The switching test can be performed quickly. In the test item changeover switch RSW, the first to third circuit selectors R
The structure in which all of SW1 to RSW3 move at the same time and each contact in the three circuits is switched simultaneously means, for example, in a rotary switch, each circuit of three stages has at least nine contacts (9 fixed terminals). So 1
By turning one knob, three movable sections (movable terminals) move at the same time, and three contacts switch simultaneously.

A cable core wire switching test apparatus according to a second aspect of the present invention comprises four or more core wire connecting terminals (T1) connectable to a plurality of core wires (1L1, 1L2 ...) Of a cable to be tested. , T2 ...) and one sag wire connection terminal (S
T) and two external terminals (TM1,
TM2), two external terminals (TM3, TM4) for connecting a conductor resistance measuring device, two external terminals (TM5, TM6) for connecting an insulation resistance tester, and one external terminal for grounding connection (TM7), a circuit connecting the countersunk wire connecting terminal (ST) and one of the external terminals for connecting the continuity tester (TM1), and three circuits each having at least 9 contacts, A test item changeover switch (RSW) having a configuration in which all of the selectors for the first to third circuits (RSW1, RSW2, RSW3) move simultaneously and each contact in the three circuits changes at the same time, and the test item changeover switch (RSW) ) First circuit selector (RSW)
1) and the terminal of the second circuit selector (RSW2) of the test item changeover switch (RSW), the core wires (1) connected to the four or more core wire connection terminals (T1, T2 ...).
..), each pair of two core wires has two circuits, and in each circuit, a core wire changeover switch having a number of contacts corresponding to the number of pairs of core wires connected to the core wire connection terminal ( The circuit connected through SW21) and the third circuit selector (RSW3) of the test item changeover switch (RSW)
And a circuit in which the ground connection external terminal (TM7) is connected, and each terminal of the continuity tester is connected to the two external terminals (TM1, TM2) on the measurement side,
Each terminal of the conductor resistance measuring device is connected to the two external terminals (TM3, TM4), and the two external terminals (TM5, T4) are connected.
M6) is connected to each terminal of the insulation resistance meter, the one external terminal for grounding connection (TM7) is connected to the ground, and the countersunk wire is connected to the countersunk wire connection terminal (ST). Core wire connection terminals (T1, T2
…) To the core wires (1L
, 1L2 ...), the pair of core wires selected from the cables to be tested is switched by the switching of the core wire changeover switch (SW21) to the first circuit of the test item changeover switch (RSW). Selector (RSW1)
Connected to the terminal of the second circuit selector (RSW2), and under the condition, the test item changeover switch (R
SW) Switch each contact in 3 circuits at the same time, and take the corresponding conduction on the ejection side in the following to OFF, the circuit for conducting the continuity test of the core wire L1-counter wire, the core wire L2-counter wire Circuit for conductor continuity test, circuit for conductor resistance measurement test of core wire L1-L2, circuit for insulation resistance test between core wire L1-earth, for insulation resistance test between core wire L2-ground And a circuit for an insulation resistance test between the core wires L1 and L2 are formed, and after the insulation resistance test of any one of the above items, and before switching to the circuit of the above items, in the insulation resistance test. In order to configure a circuit for releasing the electric charge charged in the core wire to the ground, 9 contacts that are simultaneously switched with the 3 circuits of the test item changeover switch (RSW) are used, and each contact is opened or externally connected. Terminal (TM2-
TM6) is a cable core wire switching test apparatus having a configuration in which it is connected to any one of TM6).

According to the first aspect of the present invention, the test is carried out in units of two core wires, that is, a pair of cable units.
By switching the core wire changeover switch, the core wire to be tested can be switched in units of a pair of two core wires. The core wire changeover switch may have two pairs of core wires each having a number of contacts corresponding to the number of pairs of core wires in two circuits.

According to a third aspect of the present invention, there is provided a cable core wire switching test apparatus in which the number of the core wire connecting terminals (T1, T2 ...) Is four, and the first circuit selector (RSW1) of the test item changeover switch (RSW). ) And the terminals of the second circuit selector (RSW2) of the test item changeover switch (RSW), the core wires (1L1, 1L2,) connected to the four core wire connecting terminals (T1 to T4). 2L1, 2L2), wherein each pair of two core wires is connected via a core wire changeover switch (SW21) having two contacts in two circuits. It is a cable core switching test device. It is preferable to switch the cable cores in units of two pairs of quads (4 cores) in order to facilitate the switching.
The claim 3 is adapted to the request. A rotary switch is usually used as a core wire changeover switch having three or more contacts (a few minutes forming a pair of core wires) in two circuits, but the cable core wire changeover test according to claim 3 In the device, a slide switch (or toggle switch) having two circuits and two contacts may be used.

The invention according to claim 4 is characterized in that the test item changeover switch (RSW) is a rotary switch, and the cable core wire changeover test according to any one of claims 1, 2 and 3. It is a device.

According to a fifth aspect of the present invention, the rotary switch has nine consecutive contacts, which is OFF, a circuit for conducting the continuity test of the core wire L1-the counter wire, and a continuity test for the conductor wire L2-the counter wire. Circuit, a circuit for conductor resistance measurement test of core wires L1-L2, a circuit for releasing electric charge charged in the core wires L1, L2 to ground, a circuit for insulation resistance test between core wires L1-ground, A circuit for an insulation resistance test between the core wires L2 and ground, a circuit for an insulation resistance test between the core wires L1 and L2, and a circuit for releasing the electric charges charged in the core wires L1 and L2 to the ground, The cable core wire switching test apparatus according to claim 4, wherein the cable core wire switching test apparatus is set to be formed.

According to the invention of claim 5, the test work can be carried out in accordance with the progress of normal test items. At this time, as described above,
It is convenient because the electric charge charged by the voltage applied in the insulation resistance test can always be released to the ground by setting "1, a circuit for releasing the charge charged in L2 to the ground". That is, even if the rotary switch is rotatable without a stopper, the electric charges charged on the core wires L1 and L2 can be surely released to the ground.

According to a sixth aspect of the invention, each terminal of the continuity tester is connected to two external terminals (TM1 and TM2), and
One external terminal (TM3, TM4) is connected to each terminal of the conductor resistance measuring instrument, and two external terminals (TM5, TM6) are connected to each terminal of the insulation resistance tester, respectively. The cable core wire switching test device according to any one of claims 1 to 5, comprising an insulation resistance meter.

In the cable switching test, a continuity tester is usually used for the continuity test, a conductor resistance measuring device is used for the conductor resistance measurement,
And because an insulation resistance meter is used to measure the insulation resistance,
If these are provided, it is not necessary to separately prepare them, and the work can be simplified.

According to a seventh aspect of the present invention, two core wire connecting terminals (T1, T2) connectable to a pair of core wires (L1, L2) of a cable to be tested and one sag wire connection are connected. Terminal (ST), two external terminals (TM3, TM4) for connecting the conductor resistance measuring device, two external terminals (TM5, TM6) for connecting the insulation resistance tester, and one ground connection for ground connection A circuit in which an external terminal (TM7) is connected to the counterbore wire connecting terminal (ST) and one of the external terminals (TM3) for connecting the conductor resistance measuring device, and three circuits each have at least 6 contacts. A test item changeover switch (RSW) having a configuration in which all of the first to third circuit selectors (RSW1, RSW2, RSW3) move at the same time and each contact in the three circuits changes at the same time, and the test item changeover switch Switch (RSW) first circuit selector (RSW1) terminal and one of the two core connection terminals (T1) are connected to each other, and the test item changeover switch (RSW) second circuit selector A circuit in which the terminal of (RSW2) is connected to the other of the two core wire connection terminals (T2), the terminal of the third circuit selector (RSW3) of the test item changeover switch (RSW), and the ground connection. And a circuit connected to the external terminal (TM7) for measurement, and on the measurement side, the two external terminals (TM3, TM4)
To each terminal of the conductor resistance measuring device, to each of the two external terminals (TM5 and TM6) to each terminal of the insulation resistance tester, and to the one external terminal for grounding connection (TM7).
Is connected to the ground, the countersunk wire connecting terminal (ST) is connected to the countersunk wire, and the two cores connecting terminals (T1, T2) are connected to the cores (L1, L) of the cable to be tested.
When 2) is connected, the contacts of the three circuits of the test item changeover switch (RSW) are switched at the same time, and the corresponding conduction is performed on the ejection side in the following (1) to (3) to connect the core wire L1-the counter wire. A circuit for a test, a circuit for a continuity test of the core wire L2-a counter wire, a circuit for a conductor resistance measurement test of the core wire L1-L2, a circuit for an insulation resistance test between the core wire L1-ground, The test item changeover switch (RSW) is formed so that a circuit for an insulation resistance test between the core wire L2 and the ground and a circuit for an insulation resistance test between the core wires L1 and L2 are formed.
It is a cable core wire switching test apparatus having a configuration in which 6 contacts that are simultaneously switched to all 3 circuits are used, and each contact is open or connected to any one of the external terminals (TM3 to TM6).

A cable core wire switching test apparatus according to a seventh aspect of the present invention is a cable core wire switching test apparatus according to the first aspect of the present invention (hereinafter, also simply referred to as an apparatus), which has four external terminals (TM1 to TM4). Of these, TM1 and TM2 are omitted and replaced with two, TM3 and TM4, and the test item changeover switch RSW has three circuits and six or more contacts, thereby simplifying the configuration. That is, in the apparatus according to claim 7, each of the terminals of the conductor resistance measuring device, which is arranged on the measurement side and has two external terminals TM3 and TM4, can perform both the continuity test and the conductor resistance measurement. The external terminals of the device are the same as those in the device according to claim 1, except that they are connected. Also, when used at the above-mentioned C point, in the above items 1 to 4, the test item changeover switch RSW is switched at the C point in accordance with the conduction corresponding to the test on the ejection side (D point). It is possible to form a different test circuit from the above-mentioned ones, and there is no essential difference from that in the device according to claim 1.

However, in the cable core wire switching test apparatus according to the seventh aspect, since the conductor resistance measuring instrument that can be used for both the continuity test and the conductor resistance measuring is used, the number of measuring instruments used can be reduced while After configuring the circuits (1) to (3) and performing their insulation resistance tests, the charges charged on the core wires L1 and L2 are released to the ground by separately contacting (or connecting) the ground wires. Become. When a rotary switch is used as the test item changeover switch RSW, a switch having at least 6 contacts (6 fixed terminals) in each of the three stages may be used.

According to the invention described in claim 8, in the cable core wire switching test apparatus according to claim 7, each of the two core wire connection terminals (T1, T2) is for grounding which normally constitutes an off circuit. This is a cable core wire switching test apparatus characterized in that it is connected to a ground terminal (TM7) through an open / close switch (SW41).

In the cable core wire switching test apparatus according to the seventh aspect of the present invention, after conducting the tests according to the above-mentioned circuit configurations, it is necessary to release the electric charges charged in the core wires L1 and L2 to the ground. As described above, it is necessary to separately contact (or connect) the ground wire to the core wire L1 and the core wire L2, but in the cable core wire switching test apparatus according to claim 8, the grounding on / off switch (SW41) is turned on. By (closing), the electric charges charged in the core wire L1 and the core wire L2 can be released to the ground, which facilitates the escape work.

The invention according to claim 9 is the invention according to claim 7 or 8.
In the cable core wire changeover test device described in 1., each terminal of the conductor resistance measuring device is connected to two external terminals (TM3, TM4), and each terminal of the insulation resistance meter is connected to the other two external terminals (TM5, TM6). When connecting the conductors, a conductor resistance measuring device is provided between the core wire connection terminal (T1) and the counterbore wire connection terminal (ST) and between the core wire connection terminal (T2) and the counterbore wire connection terminal (ST). The cable core wire switching test device is characterized in that a circuit open / close switch (SW42) for preventing continuity from being maintained via internal wiring is provided.

At point A or B in FIG. 10, between AD,
Or continuity test between BD (50L2 (counter wire) and 1L1
When conducting a continuity test with (core), originally,
At the terminal at the point D, there is a connection between the scooping wire 50L2 and the core wire 1L1, and it is necessary to confirm the continuity between them. In claim 7 or 8, this device is connected to the point C. If so, the following problems will occur. That is, when the device of claim 7 or 8 is connected to the point C and the conductor resistance measuring instrument and the insulation resistance meter (hereinafter, also simply referred to as instrument) are connected thereto, the connection at the point D is Even without it, the internal wiring of the instrument
Since the conduction is confirmed at the points A or B, an erroneous inspection may be caused. Continuity is maintained between the core wire connection terminal (T1) and the counterbore wire connection terminal (ST) and between the core wire connection terminal (T2) and the counterbore wire connection terminal (ST) through the wiring inside the instrument. Because it is done. However, claim 9
As described above, a circuit opening / closing switch (SW42) is provided, and the circuit opening / closing switch (SW42) is so arranged that the continuity is not maintained via the wiring in the conductor resistance measuring device during the continuity test at the point A or B. ) Is open, there is an effect that such erroneous inspection can be prevented.

The invention according to a tenth aspect is the seventh to ninth aspects.
In the cable core wire change-over test device according to any one of 1 above, the test item changeover switch (RSW) is a rotary switch, and by switching each successive contact,
The cable core wire switching test apparatus is characterized in that the circuits (1) to (3) are sequentially set to be formed.

The invention described in claim 11 is the invention according to claims 7 to 1.
0. In the cable core wire changeover test device according to any one of 0, the test item changeover switch (RSW) is replaced with one having at least 6 contacts in each circuit in 3 circuits, and at least in each circuit in 3 circuits. In lieu of using 6 contacts that have 7 contacts and are switched simultaneously with 3 circuits of the test item changeover switch (RSW) so that the circuits of 1) to 7) are formed, , After forming a circuit for the insulation resistance test of any one of the above items, before switching to the formation of the circuit of any one of the above items, there is a circuit for releasing the charges charged in the core wire to the ground in the insulation resistance test. As formed, seven contacts that simultaneously switch with the three circuits of the test item changeover switch (RSW) are used, and each contact is
It is a cable core wire switching test apparatus having a configuration in which it is open or is connected to any of the external terminals (TM3 to TM6) by wiring.

In this device, instead of using 6 contacts for the test item changeover switch, 7 contacts are used, the increased 1 contact is used, and the core line L1 and the core line L2 are changed by switching the test item changeover switch. Since a circuit for releasing the charged electric charge to the ground can be formed, it is necessary to separately provide a grounding switch (SW41) as in the cable core wire changeover test device according to claim 8. Without, you can work to escape.

The invention according to claim 12 is the invention according to claims 7 to 1.
0. In the cable core wire changeover test device according to any one of 0, the test item changeover switch (RSW) is replaced with one having at least 6 contacts in each circuit in 3 circuits, and at least in each circuit in 3 circuits. In lieu of using 6 contacts that have 7 contacts and are switched simultaneously with 3 circuits of the test item changeover switch (RSW) so that the circuits of 1) to 7) are formed, , The test item changeover switch (RSW) is also switched at the same time so as to form an OFF circuit which is not any of the circuits 7 to 7
It is a cable core wire switching test apparatus characterized in that it has a configuration in which contacts are used and each of the contacts is open or connected to any one of external terminals (TM3 to TM6).

In this device, instead of using 6 contacts for the test item changeover switch, 7 contacts are used, the increased 1 contact is used, and a circuit which is turned off by switching the test item changeover switch can be formed. . Therefore, even when the device is connected to the point C in FIG. 10, by turning the device off by this switch, the core wire connection terminal (T1) and the sag wire connection terminal (ST ), And between the core wire connection terminal (T2) and the sag wire connection terminal (ST) can be prevented from being held via the wiring in the instrument. Therefore, erroneous inspection can be prevented without the circuit opening / closing switch (SW42) as described in claim 9.

The invention according to claim 13 is the invention according to claims 7 to 1.
0. In the cable core wire changeover test device according to any one of 0, the test item changeover switch (RSW) is replaced with one having at least 6 contacts in each circuit in 3 circuits, and at least in each circuit in 3 circuits. Assuming that it has 8 contacts, instead of using 6 contacts that simultaneously switch with 3 circuits of the test item changeover switch (RSW) so that the circuits of 1) to 2) are formed, , After forming a circuit for the insulation resistance test of any one of the above items, before switching to the formation of the circuit of any one of the above items, there is a circuit for releasing the charges charged in the core wire to the ground in the insulation resistance test. 8 contacts that are switched at the same time as the three circuits of the test item changeover switch (RSW) so that an OFF circuit that is formed and is not any of the above circuits is formed. Used, the respective contact, open, or the external terminal (TM3～
TM6) is a cable core wire switching test apparatus having a configuration in which it is connected to any one of TM6). This device has the effects of claims 11 and 12 described above.

According to a fourteenth aspect of the present invention, in the cable core wire changeover test apparatus according to the thirteenth aspect, the test item changeover switch (RSW) is a rotary switch,
The cable core wire switching test apparatus is characterized in that, by switching between the successive contacts, the following circuits (1) to (2) are sequentially formed instead of the circuits (1) to (4). OFF. Core wire L1-A circuit for conducting a continuity test of the counterbore wire. Core wire L2-Circuit for continuity test of the counter wire. Circuit for conductor resistance measurement test of core wires L1-L2. A circuit for releasing the electric charges charged in the core wires L1 and L2 to the ground. Circuit for insulation resistance test between core wire L1 and ground. Circuit for insulation resistance test between core wire L2 and ground. Circuit for insulation resistance test between core wires L1-L2.

The test item changeover switch (RSW) is
Although not limited to the rotary switch, test items can be easily switched by using the rotary switch in this way.

The invention according to claim 15 provides the invention according to claims 7 to 1.
In the cable core wire switching test apparatus according to any one of 4 above, each terminal of the conductor resistance measuring device is connected to two external terminals (TM3, TM4), and two external terminals (TM5, T4) are connected.
M6) is a cable core wire switching test apparatus including a conductor resistance measuring device and an insulation resistance meter, each terminal of the insulation resistance meter being connected to M6).

The invention described in claim 16 is the invention according to claims 7 to 1.
5. The cable core wire switching test device according to any one of 5, wherein an external terminal for connecting the conductor resistance measuring device is (T
Instead of two of (M3, TM4), (TM1, TM2, T
M3, TM4) are provided, and the sag wire connection terminal (S
T) and one of the external terminals for connecting the conductor resistance measuring instrument (TM3) are replaced with a circuit in place of the sag wire connecting terminal (ST) and the external terminal for connecting the conductor resistance measuring instrument. One of the two external terminals (TM3, TM4) is provided on the measurement side by providing a circuit connected to one (TM1)
Instead of connecting each terminal of the conductor resistance measuring instrument to, each terminal of the continuity tester which is a conductor resistance measuring instrument is connected to the two external terminals (TM1, TM2), and the two external terminals ( TM3, TM4) is connected to each terminal of the conductor resistance measuring instrument, and the test item changeover switch (RS
Open each contact of W) or external terminal (TM3 to T
Instead of wiring to any of M6),
Open each contact, or external terminal (TM2-TM
It is a cable core wire switching test device having a configuration in which wiring is connected to any one of 6).

In the seventh to fifteenth aspects, since the continuity test and the conductor resistance measurement use the conductor resistance measuring device, only one meter is required. However, when a digital tester is used as the conductor resistance measuring device, The continuity test becomes inefficient, and when an analog tester is used, the conductor resistance measurement accuracy decreases. In this device, by connecting each terminal of the analog tester as a continuity tester to the two external terminals (TM1, TM2), the continuity test can be efficiently performed, and another two external terminals (TM3, TM3, By connecting each terminal of the digital tester as a conductor resistance measuring device to TM4), the accuracy of conductor resistance measurement can be improved.

The invention described in claim 17 is the invention according to claims 1 to 4.
In the cable core wire changeover test device described in any one of 1, the test item changeover switch (RSW) is replaced with one having at least 9 contacts in each circuit in 3 circuits, and at least 8 contacts in each circuit in 3 circuits. In place of using 9 contacts that simultaneously switch with the three circuits of the test item changeover switch (RSW) so that the circuits of (1) to (3) are formed, the circuits of (1) to (3) are formed and After the insulation resistance test of any of the above items, before switching to the circuit of any of the above items, the test item switching is performed so that the circuit for releasing the electric charge charged in the core wire to the ground in the insulation resistance test is configured. Eight contacts that switch simultaneously with the three circuits of the switch (RSW) are used, and each contact is opened or an external terminal (TM2 to
This is a cable core wire switching test device having a configuration in which any one of TM6) is connected by wiring.

The invention according to claim 18 is the cable core wire changeover test apparatus according to claim 17, wherein the test item changeover switch (RSW) is a rotary switch,
The cable core wire switching test apparatus is characterized in that the circuits (1) to (3) are set to be sequentially formed by switching the continuous contacts.

[0046]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a cable core wire switching test apparatus according to the present invention will be described in detail with reference to FIGS. FIG. 1 shows a core switching test apparatus 10
1 is a circuit diagram of FIG. 1, and two core wire connection terminals T1 and T2 connectable to a pair of core wires (LINEL1, L2) of a cable to be tested (measurement cable) and one sag wire connection terminal ST. , Two external terminals TM1 and TM2 for connecting a continuity tester (an analog tester AT in this embodiment)
And a conductor resistance measuring device (in this embodiment, a digital tester D
T) Two external terminals TM3 and TM4 for connection and two external terminals TM5 and TM6 for insulation resistance meter (ME) connection
And one external terminal TM7 for ground connection
, Each external connection terminal is provided. Of these, the sag wire connection terminal ST and one of the external terminals TM1 for connecting the continuity tester are connected by wiring.

On the other hand, in the figure, RSW is a test item changeover switch, and each of the three circuits has nine contacts (fixed terminals), but in the present embodiment, three switches, first to third, are provided. It uses rotary switches stacked in three stages so that it has a circuit. This test item change switch RS
W is a knob (10) provided on an operation unit outside the apparatus, so that the first to third circuit selectors (movable sections) RSW1,
All of the RSW2 and RSW3 move at the same time, and the nine contacts (1 to 9) in each of the three circuits are switched simultaneously. In addition, commercially available 12 contacts may be used, and in that case, it is preferable to use the first contact (fixed terminal) to the ninth contact (fixed terminal) 1 to 9.

In this embodiment, the test item changeover switch RSW
Of the first circuit selector RSW1 and the core wire connection terminal T1 are connected by wiring, and the test item changeover switch RSW
The second circuit selector RSW2 and the core wire connection terminal T2 are connected by wiring. The terminal of the third circuit selector RSW3 of the test item changeover switch (hereinafter also referred to as a rotary switch) RSW and the ground connection external terminal TM7 are connected by wiring.

The first of the rotary switches RSW
~ Each contact (fixed terminals 1 to 9) corresponding to the third circuit selector RSW1, 2, 3 (hereinafter, also simply referred to as selector 1, 2, 3) is either open or TM2 to TM6. The wiring is connected as follows (see FIG. 1).

That is, the contacts (fixed terminals) 1 corresponding to any of the selectors 1, 2, 3 are open (no wiring connection). Regarding the contact 2, the one corresponding to the selector 1 is the external terminal TM2 for connecting the continuity tester.
The ones corresponding to the selectors 2 and 3 are open-wired and are open.

Regarding the contact 3, the one corresponding to the selectors 1 and 3 is open, and the one corresponding to the selector 2 is wire-connected to the external terminal TM2 for connecting the continuity tester.

Regarding the contact 4, the one corresponding to the selector 1 is wired and connected to the external terminal TM3 for connecting the conductor resistance measuring instrument, and the one corresponding to the selector 2 is wired to the external terminal TM4 for connecting the conductor resistance measuring instrument. Those connected and corresponding to the selector 3 are open.

Regarding the contacts 5, the contacts 5 corresponding to the selectors 1, 2 and 3 are connected by wiring.

Regarding the contact 6, the one corresponding to the selector 1 is wired to the external terminal TM5 for insulation resistance meter connection, the one corresponding to the selector 2 is open, and the one corresponding to the selector 3 is the insulation resistance meter. External terminal T for connection
Wired to M6.

Regarding the contact 7, the one corresponding to the selector 1 is opened, the one corresponding to the selector 2 is connected to the external terminal TM5 for insulation resistance meter connection by wiring, and the one corresponding to the selector 3 is the insulation resistance meter. External terminal T for connection
Wired to M6.

Regarding the contact 8, the one corresponding to the selector 1 is wire-connected to the external terminal TM5 for insulation resistance meter connection, and the one corresponding to the selector 2 is wire-connected to the external terminal TM6 for insulation resistance meter connection, The one corresponding to the selector 3 is open.

Regarding the contacts 9, the contacts 9 corresponding to the selectors 1, 2 and 3 are connected by wiring. Also,
Wiring is also connected between the contacts 5.

The cable core wire switching test apparatus 101 having such a configuration is arranged on the measurement side (C station in FIG. 10), and each terminal of the analog tester AT is connected to the external terminals TM1 and TM2 as a continuity tester. External terminal TM3,
Each terminal of the digital tester DT as a conductor resistance measuring device is connected to TM4. Then, each terminal of the insulation resistance meter ME is connected to the external terminals TM5 and TM6, and the external terminal TM7 for earth connection is connected to the earth. Then, as described above, the existing cables (1L1, 1L2 ... 50L1, 50) are used.
When switching from L2) to the new cable, the work is performed as follows. That is, after the work before switching and preparation (confirmation of the scooping line, etc.) are performed at each point, the switching work is performed as follows.

That is, in FIG. 10, core wire cutting terminals (wiring terminals) of the switching lines at points C and D, respectively.
At, open the cable and leave it with no load and no voltage. At point D, one terminal of the clip cord SC is connected to the terminal of the countersunk wire 50L2.

In the cable core wire switching test device (hereinafter, also referred to as a testing device) 101 of the present embodiment, with the above-described configuration, the countersunk wire connecting terminal ST is connected to the countersunk wire 50L2, and two core wires forming a pair are connected. Connection terminals T1, T
The core wires 1L1 and 1L2 of the cable to be tested are connected to 2, and the knob 10 is turned to sequentially switch the contacts (fixed terminals) in the three circuits of the rotary switch RSW from the contact 1 to the contact 9 simultaneously. As a result, circuits for each test and measurement are configured as follows.
However, when the contact point 2 is switched to the contact point 4, the corresponding conduction is established by the clip code SC at the point D (exit side). That is, set the rotary switch RSW to the O of contact 1.
When switching from FF, at the contact 2, the core wire 1L1 (simply L
(Also referred to as 1) -a circuit for conducting the continuity test of the countersunk wire, the contact 3 is a core wire L2 (also simply referred to as L2) -a circuit for conducting the continuity test of the countersunk wire, and a contact 4 is a conductor of the cores L1-L2. It becomes a circuit for resistance measurement test. And contact point 5
Then, both the core wires L1 and L2 are connected to the ground. The contact 6 is a circuit for insulation resistance test between the core wire L1 and the ground, the contact 7 is a circuit for insulation resistance test between the core wire L2 and the ground, and the contact 8 is insulation between the core wires L1 and L2. A circuit for resistance test is formed. At the contact point 9, both the core wires L1 and L2 are connected to the ground.

However, in the continuity test of the existing cable,
At point D (exit side), while conducting the connection between the countersunk wire 50L2 and the core wire L1, at point C (measurement side), turn the rotary switch RSW by turning its knob 10 to turn OFF the contact 1.
Switch to contact 2. Then, a circuit for the continuity test of the core wire L1 -the counter wire is formed, so that the operator can perform the continuity test of the core wire L1 only by confirming the deflection of the needle in the analog tester AT. Then, at the point D (exit side), the countersunk wire 50L2 and the core wire L2 are electrically connected to each other, and at the point C (measurement side), the rotary switch RSW is turned by turning the knob 10 from the contact 2 to the contact 3. Switch. Then, since the circuit for the continuity test of the core wire L2-the counter wire is formed, the operator is required to operate the analog tester AT.
The conduction test of the core wire L2 can be performed only by confirming the deflection of the needle at.

Next, between A and D and between B and D, the cable core wire numbers and L1 and L2 are checked (continuity test) as in the conventional case, and the continuity test is performed at points A and B. The existing cable (between A and B of L1 and L2) is cut. Then, switch to the new cable (L1, L2). After the existing cable is switched to the new cable in this way, a continuity test is first performed on the core wires (L1, L2) of the new cable. This continuity test can be performed in exactly the same way as the continuity test of the existing cable described above. That is, the operator switches the rotary switch RSW of the test apparatus from the OFF state of the contact 1 to the contact 2 while maintaining continuity between the countersunk wire 50L2 and the core wire L1 at the point D (exit side).
The continuity test of the core wire L1 can be performed only by confirming the deflection of the needle in the analog tester AT. Then, at the point D (exit side), by switching the contact point 2 to the contact point 3 while maintaining continuity between the countersunk wire and the core wire L2, the operator only needs to confirm the deflection of the needle in the analog tester AT. The continuity test of the core wire L2 can be performed.

At the point D (exit side), the core line L1,
At the point C (measurement side), the rotary switch RSW is switched from the contact 3 to the contact 4 while maintaining continuity between L2. In this way, the worker can perform the conductor resistance test by confirming and recording the conductor resistance value in the digital tester DT.

Further, when the rotary switch RSW is switched from the contact 4 to the contact 5 at the point C (measurement side), the core wire L
Both 1 and L2 are connected to the ground, but after that, the rotary switch RSW is switched from the contact 5 to the contact 6 and the insulation resistance meter ME is checked, whereby the core wire L1-E (ground)
Insulation resistance test between Then, the rotary switch RSW is switched from the contact 6 to the contact 7, and the insulation resistance meter M
By confirming E, the insulation resistance test between the core wires L2-E can be performed. Further, set the rotary switch RSW to the contact 7
By switching from the contact 8 to the contact 8 and checking the insulation resistance meter ME, the insulation resistance test between the core wires L1 and L2 can be performed. After that, when the rotary switch RSW is switched from the contact 8 to the contact 9, both the core wires L1 and L2 are connected to the ground, so that the electric charges charged on the core wires L1 and L2 in the insulation resistance test are released to the ground. Further, even after the insulation resistance test between the core wires L1 and L2, the rotary switch RSW is switched from the contact 8 to the contact 7, the contact 6, and the contact 5, because both the core wires L1 and L2 are connected to the ground. The electric charges charged on the core wires L1 and L2 in the insulation resistance test are released to the ground. After that, at points C and D, the isolation terminals are returned to the original state, and a test is performed between the connected communication devices to confirm normality.

Thus, for 1L1 and 1L2, after switching the existing cable to the new cable, 2L1, 2L
For No. 2, the continuity test, the conductor resistance measurement test, the insulation resistance measurement, and the like are performed in the same manner, and subsequently, the existing cable for each pair of two core wires is switched to the new cable.

As described above, the test apparatus 10 of the present embodiment
If point 1 is used, at the point C, before switching the existing cable to the new cable, each test device is connected to each external terminal of this test equipment, and the core wire connection terminals T1 and T are connected.
After connecting 2 and the terminals connected to the cores L1 and L2 of the cable to be switched, simply rotate the knob 10 of the rotary switch RSW to sequentially switch the contacts and check each tester and measuring instrument. Predetermined measurement is possible. That is, according to the test apparatus 101, on the measurement side, the circuit configuration for each test has a complicated work of contacting and separating each terminal of each tester to each terminal of the terminal block as in the conventional case. Since it is unnecessary, the work can be done easily and quickly. As a result, the test and measurement time can be shortened, and erroneous tests can be avoided. In addition, the electric charge charged by the insulation resistance test can be surely released to the ground.

Next, the test apparatus 201 according to the second embodiment of the present invention will be described with reference to FIGS. 3 and 4. However, since there is essentially no difference from the above-described embodiment, the same parts are designated by the same reference numerals, and the description will be centered on the difference. That is, the above-mentioned embodiment has two core wire connection terminals, and these are directly connected to the terminals of the first circuit selector RSW1 and the second circuit selector RSW2 of the rotary switch RSW, respectively. However, the following points are different.

That is, in the test apparatus 201 of this embodiment, the number of core wire connecting terminals is four, and a pair of core wires (1L1, 1L2) are connected to the core wire connecting terminals T1 and T2 in FIG. To the core wire connecting terminals T3 and T4 of another pair of core wires (2
L1, 2L2) are connected. Then, each of the pair of core wires is connected to the terminal of the first circuit selector RSW1 of the rotary switch RSW and the terminal of the second circuit selector RSW2 via the core wire changeover switch SW21 having two contacts in two circuits. Each is configured to be connected. That is, in localization, a pair of core wires (1L) connected to the core wire connection terminals T1 and T2 are connected.
1, 1L2) are respectively connected to the terminal (movable terminal) of the first circuit selector RSW1 and the terminal (movable terminal) of the second circuit selector RSW2 of the rotary switch RSW, and by switching the core wire changeover switch SW21. , A pair of core wires (2L) connected to the core wire connection terminals T3 and T4.
1, 2L2) are the terminals of the first circuit selector RSW1 of the rotary switch RSW and the second circuit selector RS.
It is set so as to be connected to the terminals of W2, respectively.

In the present embodiment, two pairs of core wires, that is, one quad core wire forming four core wires are connected in advance to the core wire connecting terminals T1 to T4 to switch the core wires. When the switch SW21 is in the localization position, first, a pair of core wires (1L
1, 1L2) is tested in the same manner as in the above embodiment. After that, the core wire changeover switch SW21 is switched from the orientation, and another pair of core wires (2L1, 2L2) is tested in the same manner as in the above embodiment.

That is, in the present embodiment, the number of core wire connecting terminals is 4
A core wire changeover switch (line changeover switch) SW21 is provided in the middle of the circuit from the core wire connection terminals T1 to T4 and the rotary switch RSW. Thereby, in the above-mentioned form, two core wires, that is, a pair (Pair)
This test can be repeated in units of two pairs of four-core wires (1 quad), whereas the test is repeated in units.

When the number of core wire connecting terminals is 8, the terminals of the first circuit selector RSW1 of the test item changeover switch RSW and the second terminal of the test item changeover switch RSW are set.
A circuit in which a pair of two core wires of the core wires connected to the eight core wire connecting terminals are connected to the terminals of the circuit selector RSW2 via a core wire changeover switch having four contacts in two circuits. By setting the core wire selection switch,
It suffices that the core wires to be tested can be switched in units of a pair of two core wires. In other words, as the core wire changeover switch, it is sufficient to use one having a pair of contacts even in two circuits. The core wire changeover switch is preferably a slide switch (or toggle switch) with two contacts, but a rotary switch is preferably used with three or more contacts. The greater the number of core wire connecting terminals, the greater the number of core wire pairs that can be tested at one time. The core wire changeover switch may be appropriately set according to the number of pairs (the number of pairs).

For example, when the number of the core wire connecting terminals is four, the core wire changeover switch is provided in the above-mentioned embodiment, but in the present invention, the continuity tester, the conductor resistance measuring device, and the insulation resistance meter are provided. It is possible to simultaneously test two pairs of core wires by preparing another one and combining the circuit shown in FIG. 1 and two test item changeover switches RSW. That is, two configurations including the circuit of FIG. 1 are prepared, 1L1 and 1L2 are connected to the external terminals T1 and T2 of one, and the external terminals T1 and T2 of the other are T3 and T4.
2L1 and 2L2 are connected as described above, and each of the first to third circuit selectors (movable) is configured by stacking two stages of rotary switches, which are test item changeover switches RSW having three contacts and nine contacts in each circuit. Intercept) RSW
It is assumed that 1 to RSW3 all move at the same time. That is, the rotary switch having three contacts has nine contacts in each circuit and the rotary switch having nine contacts in each circuit has six circuits. In this case, analog tester, digital tester,
Two insulation resistance meters are required, but since there are four core wire connection terminals, two pairs of four core wires (1L1,
1L2, 2L1, 2L2), the four can be tested in half the time. From this, it is clear that, for example, in the case of using 8 core wire connection terminals, 12 circuits, 9 contact rotary switches are used, and 4 analog testers are provided. it can.

Further, in each of the above-mentioned embodiments, the rotary switch is used as the test item changeover switch, but in the present invention, the test item changeover switch has three circuits and each circuit has at least 9 contacts, and the first to first The selector is not limited to this, as long as all the selectors for the three circuits move at the same time and the contacts in the three circuits are switched at the same time. Further, although it has been described as having nine contacts, as described above, one having twelve contacts or one having more contacts may be used. In the test item changeover switch of the test apparatus of the present invention, at least 9
The number of contact points is sufficient, and if there are more contact points than this, it may be left open.

Further, in the above-mentioned embodiment, the contact is successively turned off and turned on by the nine consecutive contacts in the rotary switch.
Core wire L1-circuit for conducting continuity test of core wire, core wire L2-circuit for conducting continuity test of core wire, core wire L1-
Circuit for conductor resistance measurement test of L2, core wires L1, L
Circuit for releasing the electric charge charged to 2 to the ground, circuit for insulation resistance test between core wire L1 and ground, core wire L
Circuit for insulation resistance test between 2-ground, core wire L1
Circuit for insulation resistance test between -L2, core wires L1, L
Although a circuit for releasing the electric charge charged to 2 to the ground is formed, the test apparatus of the present invention is not limited to this order.

Further, the rotary switch has a knob 1
When 0 does not turn over from the contact 8 and rotates only to the contact 7 side (contact 8 with a stopper), an 8-contact rotary switch can be used. That is, it is possible to use a rotary switch of the type used in each of the above-mentioned modes without the contact 9.

Further, in the cable core wire switching test devices 101 and 201 of the above-mentioned respective forms, the continuity tester, the conductor resistance measuring device and the insulation resistance meter are separately prepared, and each terminal of the continuity tester is connected to an external terminal. It is assumed that the terminals are connected to TM1 and TM2, the terminals of the conductor resistance measuring device are connected to the external terminals TM3 and TM4, and the terminals of the insulation resistance meter are connected to the external terminals TM5 and TM6. The resistance measuring device and the insulation resistance meter may be connected in advance in this manner.
In a test device to which such a tester or the like is connected in advance, it is not necessary to separately prepare such a tester or the like. By using it, the cost of the test apparatus can be reduced.

Next, a third embodiment (apparatus according to claim 7) will be described with reference to the circuit diagram of the apparatus shown in FIG. However, since this device 301 is a simplified configuration of the embodiment of FIG. 1, description will be given centering on the differences, and the same parts will be denoted by the same reference numerals and description thereof will be appropriately omitted. To do. The same applies to the description of other embodiments below.

The device 301 shown in the circuit of FIG. 5 has the external terminals TM1 and TM2 in the embodiment of FIG.
TM3 and TM4 are two external terminals for connecting a conductor resistance measuring device (digital tester DT in this embodiment) that serves both a continuity test and a conductor resistance measurement. Then, the counterbore connection terminal ST and one of the external terminals TM3 are wire-connected.

Regarding the test item changeover switch RSW, it is assumed that there are three circuits and each circuit has six contacts (fixed terminals), and rotary switches stacked in three stages so as to have three circuits are illustrated. There is. The test item changeover switch RSW is rotated by an external knob (not shown) in the same manner as in each of the above-described modes, so that the first to third circuit selectors (movable sections) RSW1, RSW2, RSW.
All of SW3 move simultaneously, and each 6 contacts (1-6) in the three circuits are simultaneously switched.

Then, the first rotary switch RSW
~ Each contact (fixed terminals 1 to 6) corresponding to the third circuit selector RSW1, 2, 3 (hereinafter, also simply referred to as selector 1, 2, 3) is either open or TM3 to TM6. The wiring is connected as follows.

That is, regarding the contact (fixed terminal) 1, the one corresponding to the selector 1 is wire-connected to the external terminal TM4, and the one corresponding to the selectors 2 and 3 is open. Regarding the contact 2, the one corresponding to the selectors 1 and 3 is open, and the one corresponding to the selector 2 is wire-connected to the external terminal TM4. Regarding the contact 3, the one corresponding to the selector 1 is wire-connected to the external terminal TM3, and the one corresponding to the selector 2 is the external terminal TM.
4 is wired and connected to the selector 3 is open.

Regarding the contact 4, the one corresponding to the selector 1 is wire-connected to the external terminal TM5, the one corresponding to the selector 2 is open, and the one corresponding to the selector 3 is wire-connected to the external terminal TM6. ing. Regarding the contact 5, the one corresponding to the selector 1 is opened, the one corresponding to the selector 2 is wire-connected to the external terminal TM5, and the one corresponding to the selector 3 is the external terminal T.
Wired to M6. Regarding the contact 6, the one corresponding to the selector 1 is wire-connected to the external terminal TM5,
The one corresponding to the selector 2 is wire-connected to the external terminal TM6, and the one corresponding to the selector 3 is open.

In the cable core wire switching test apparatus 301 having such a configuration, this is arranged on the measurement side (C station in FIG. 10), and the external terminals TM3 and TM4 are used for conducting resistance measurement and conducting resistance measurement. Each terminal of a digital tester DT, which is a container, is connected. And the external terminal T
Each terminal of the insulation resistance meter ME is connected to M5 and TM6, and the external terminal TM7 for earth connection is connected to earth. Then, the existing cables (1L1, 1L2 ... 50L1, 50
When switching from L2) to the new cable, the work can be performed in substantially the same manner as described above.

That is, also in the cable core wire switching test apparatus 301 of the present embodiment, the counterbore wire 50L2 is connected to the counterbore wire connection terminal ST, and the two core wire connection terminals T1 and T2 forming a pair are tested. Cable core 1
L1 and 1L2 are connected, and the rotary switch R
The contacts (fixed terminals) in the three SW circuits can be tested and measured by sequentially switching from contact 1 to contact 6 at the same time. That is, when each selector of the rotary switch RSW is connected to the contact 1, a circuit for conducting the continuity test of the core wire 1L1 (hereinafter also simply referred to as L1) -the counter wire, and sequentially switched, and at the contact 2, Core wire 1L2
(Hereinafter, also simply referred to as L2) -a circuit for conducting a conduction test of the counterbore wire, and a circuit for contact 3 at a conductor resistance measurement test of the core wires L1-L2. Then, at the contact 4, the core wire L
A circuit for an insulation resistance test between 1 and ground, a contact 5 is a circuit for an insulation resistance test between the core wire L2 and ground,
At the contact 6, a circuit for an insulation resistance test between the core wires L1 and L2 is formed. By using each circuit thus formed, it is possible to easily perform a test or a measurement. However, when switching from the contact 1 to the contact 3, it is the same that the corresponding conduction is established by the clip code SC at the point D (exit side) in FIG.

In the cable core wire switching test apparatus 301 of the present embodiment, since the conductor resistance measuring device (digital tester DT) that can be used for both the continuity test and the conductor resistance measurement is used, it is possible to reduce the number of instruments used. On the other hand, after performing the above insulation resistance tests, the core wire L1,
Since a circuit for releasing the electric charge charged in the core wire L2 to the ground cannot be formed unlike the device of the above-described form, it is released to the ground by separately connecting (or connecting) the ground wire.

At the point A or B in FIG. 10, A
When conducting a continuity test between D or between BDs (a continuity test between 50L2 (around wire) and 1L1 (core wire)), this device 301 is connected to point C, and a conductor resistance measuring device is connected to it. Then, even if the above-mentioned connection is not made at the point D, the internal wiring of the instrument will confirm the continuity at the point A or B, resulting in an erroneous inspection. Therefore, when conducting a continuity test between AD or BD, it is necessary to separate the conductor resistance measuring device connected to the external terminal of the device 301 at the point C.

Next, the fourth embodiment (claim 8) will be described.
6 to the device according to FIG.
A description will be given based on the circuit diagram of 01. However, since this is also an improvement of the embodiment of FIG. 5, the same reference numerals are given to the same portions, and only the differences will be described.

That is, in the cable core wire switching test apparatus 401 of the present embodiment, in the above-described embodiment, each of the two core wire connecting terminals (T1, T2) is provided with a grounding open / close switch (which normally constitutes an off circuit). Push-button switch)
It is connected to the ground terminal (TM7) through the SW41. Further, the core wire connection terminal (T1) in the above-described embodiment
And the selector R for the first circuit of the rotary switch RSW
The circuit opening / closing switch SW is provided between the terminal of SW1 and the core connection terminal (T2) in the above-described embodiment and the terminal of the second circuit selector RSW2 of the rotary switch RSW.
42 are provided.

As a result, in the present embodiment, by turning on (closing) the grounding open / close switch SW41, the electric charges charged in the core wires L1 and L2 can be released to the ground. Also, the circuit open / close switch SW
By opening 42, two external terminals (TM3, TM
Even when connecting each terminal of the conductor resistance measuring device to 4) and connecting each terminal of the insulation resistance meter to the other two external terminals (TM5, TM6), the core wire connecting terminal (T1) and the counterbore wire connection It is possible not to maintain electrical continuity between the terminal (ST) and between the core wire connection terminal (T2) and the counterbore wire connection terminal (ST) via wiring in the conductor resistance measuring device.

Next, a fifth embodiment (apparatus according to claim 11) will be described with reference to the circuit diagram of the apparatus shown in FIG. However, since the device 501 shown in this circuit diagram should be called an improvement of the embodiment of FIGS. 5 and 6, the same parts are designated by the same reference numerals, and only the differences will be described.

That is, in this device 501, the test item changeover switch (RSW) in the device shown in FIG. 5 has three circuits and has seven contacts in each circuit. By switching (RSW), it is possible to form a circuit for releasing the electric charges charged in the core wire L1 and the core wire L2 to the ground. That is,
In this embodiment, among the contacts (fixed terminals 1 to 7) corresponding to the first to third circuit selectors RSW1, 2 and 3 of the rotary switch RSW, the contacts 1 to 3 are shown in FIG.
In the same way as the contacts 1 to 3 of the test item changeover switch (RSW) in the above device, wiring connection or open is made. Of the contacts (fixed terminals 1 to 7) corresponding to the selectors RSW 1, 2, and 3, the contacts 5 to 7 correspond to the contacts (fixed to the selectors RSW 1, 2 and 3 in the apparatus of FIG. Corresponding to terminals 4-6), wiring connection or open. Then, each selector R in this embodiment
The contacts 4 corresponding to SW1, 2, 3 are connected by wiring. Since the circuit opening / closing switch SW42 is provided as in the case shown in FIG. 6, the erroneous inspection described above can be prevented by opening the circuit opening / closing switch SW42.

As a result, in the device 501 of this embodiment, a circuit similar to that in the device of FIG. 5 is formed. After that, the knob of the rotary switch (RSW) is rotated in the forward direction to switch from the contacts 1 to 7 to form a circuit for any insulation resistance test, and then the knob is reversed to conduct the continuity test or the conductor. The terminals of each selector are connected to contacts 4 before switching to the formation of a circuit for resistance measurement. As a result, a circuit for releasing the electric charges charged in the core wire to the ground in the insulation resistance test is formed, so that the escape work can be performed without separately providing the grounding open / close switch.

Next, a sixth embodiment (apparatus according to claim 12) will be described with reference to the circuit diagram of the apparatus shown in FIG. However, since this is also an improvement of the embodiment of FIGS. 5 and 6, the same portions are denoted by the same reference numerals, and only the differences will be described.

That is, in this device 601, the test item changeover switch (RSW) in the device shown in FIG. 5 has three circuits and each circuit has seven contacts, and the increased one contact is used to make the test item changeover switch (RSW). By switching (RSW), it is possible to form a circuit which is not in any test or measurement circuit and is turned off. That is,
In the present embodiment, of the contacts 1 to 7 of each circuit, the contact 1 is left open, and the contacts 2 to 7 of each circuit are respectively opened as shown in FIG.
The wiring connection or open is made corresponding to the contacts 1 to 6 in the device.

As a result, in the device 601 of this embodiment, the same test circuit as in the device of FIG. 5 is formed, and it is neither a test circuit nor a measurement circuit.
Circuit is formed. Therefore, the device 601 is shown in FIG.
Even when it is connected to the point C in Fig. 10, the device is held in the OFF state by setting the selector as the contact 1 by switching the test item changeover switch (RSW). Therefore, at the point A or B in Fig. 10. Continuity between the core wire connection terminal (T1) and the counterbore wire connection terminal (ST) and between the core wire connection terminal (T2) and the counterbore wire connection terminal (ST) is maintained via the wiring inside the instrument. Can be easily prevented. In this circuit, as in the case shown in FIG. 6, each of the two core wire connecting terminals (T1, T2) is provided with a grounding open / close switch (push button switch) SW41 that normally constitutes an off circuit. By interposing it and connecting it to the ground terminal (TM7), the electric charge charged on the core wire in the insulation resistance test can be released to the ground by the push button operation.

FIG. 9 shows a circuit diagram of a device according to the seventh embodiment (devices according to claims 13 to 15). This device 701 has a test item changeover switch (RSW)
The three circuits have eight contacts, and each circuit has the effects of the sixth and seventh embodiments. Therefore, the same reference numerals are given to the same portions, and only the differences will be described.

That is, in this device, the test item changeover switch (RSW) in the device of FIGS. 7 and 8 has three circuits and each circuit has eight contacts, and the increased two contacts are used to make the test item changeover switch. By switching (RSW),
It is possible to form a circuit for releasing the electric charges charged in the core wire L1 and the core wire L2 to the ground, and to form a circuit which is not in any test or measurement circuit and is in the OFF state. That is, in the present embodiment, among the contacts 1 to 8 corresponding to the selectors 1 to 3, the contacts 1 to 4 are
Is the same wiring connection or open as the contacts 1 to 4 in the apparatus of FIG. Then, the contact 5 in the present embodiment
8 to 8 are wired or opened corresponding to the contacts 4 to 7 in the apparatus of FIG. As a result, in the present embodiment, it is possible to combine the effects of claims 11 and 12 described above.

Moreover, in the present embodiment, the test item changeover switch (RSW) is a rotary switch, and the contact point is turned off by switching to the continuous contacts 1 to 8, and the core wire L1 is turned on.
-A circuit for conducting a continuity test of the countersunk wire, a circuit for conducting a continuity test of the core wire L2-a counter wire, a circuit for conducting a conductor resistance measurement test of the cores L1-L2, and a charge charged on the cores L1 and L2. Circuit for releasing to ground, circuit for insulation resistance test between core wire L1 and ground, circuit for insulation resistance test between core wire L2 and ground, for insulation resistance test between core wires L1 and L2 Circuits can be formed one after another, which is extremely convenient. Rotary switch has contacts 1-8
Within a range (between), there is a knob that can be rotated in the normal direction or the reverse direction, and it is preferable that the knob does not turn over from the contact 8 to switch to the contact 1 (with a stopper). That is, when using such a rotary switch with a stopper, it is sufficient to use a test item changeover switch having eight contacts.

Also in this apparatus, the two external terminals (TM3, TM4) are connected to the terminals of the conductor resistance measuring instrument, and the two external terminals (TM5, TM6) are connected to the terminals of the insulation resistance meter. From the viewpoint of ease of use, it is preferable to previously include a conductor resistance measuring device and an insulation resistance meter.

In FIGS. 6 to 9, the continuity test and the conductor resistance measurement are performed using two external terminals (TM) in the apparatus.
3), TM4) is connected to each terminal of one conductor resistance measuring instrument, so only one measuring instrument is required, but when using a digital tester, the continuity test becomes inefficient.
When using an analog tester, the accuracy of conductor resistance measurement decreases. In the present invention, even when the number of contacts of each selector in the test item changeover switch is 6 to 8 as in the device shown in FIGS. 6 to 9, the embodiment shown in FIGS. As in the embodiment, it is preferable that four external terminals (TM1 to TM4) are provided for the continuity test and the conductor resistance measurement.

That is, as described in claim 16,
The cable core wire switching test device according to any one of claims 7 to 15, wherein the external terminal for connecting the conductor resistance measuring device is replaced with two (TM3, TM4) and (TM).
1, TM2, TM3, TM4) are provided, and instead of the circuit in which the sag wire connection terminal (ST) is connected to one of the external terminals (TM3) for connecting the conductor resistance measuring device, the sag A circuit is provided in which a line connection terminal (ST) is connected to one of the external terminals (TM1) for connecting the conductor resistance measuring device, and the conductor resistance is measured on the two external terminals (TM3, TM4) on the measurement side. The two external terminals (TM1, TM2) instead of connecting each terminal of the container
Is connected to each terminal of the continuity tester, which is a conductor resistance measuring instrument, and each terminal of the conductor resistance measuring instrument is connected to the two external terminals (TM3, TM4), and the test item changeover switch (RSW) is further connected. Instead of wire-connecting each contact to any one of the open or external terminals (TM3 to TM6), connect each contact to any one of the open or external terminals (TM2 to TM6). It is a cable core wire switching test device having a configuration of wiring connection. For example, when the test item changeover switch (RSW) having eight contacts in each circuit shown in FIG. 9 is used, the contact 9 is omitted in FIG.

Further, also in the cable core wire switching test apparatus according to any one of claims 7 to 15, the core wire connection terminals can be two or more pairs. And
At this time, as shown in FIG. 3, the core wire changeover switch SW21 may be provided and switched.

In the present invention, the continuity tester and the conductor resistance measuring device may be appropriately selected. The present invention is
The present invention is not limited to the above-mentioned embodiments, and can be embodied by appropriately changing the design without departing from the scope of the invention. Although explained in the case of intermediate switching, it can also be used when switching between stations. The present invention is not limited to communication cables and signal cables, but can also be applied to switching of general lines (cables).

[0104]

As apparent from the above description, according to the cable core wire switching test apparatus of the present invention, the circuit configuration for each test is simple and quick on the measurement side when switching the communication cable or the signal cable. You can As a result, the test and measurement time can be shortened, and erroneous tests can be avoided.

[Brief description of drawings]

FIG. 1 is a circuit diagram illustrating a first embodiment of a test apparatus of the present invention.

2 is a schematic configuration diagram showing the arrangement of terminals, rotary switches and the like (operation unit) of the test apparatus of FIG.

FIG. 3 is a circuit diagram illustrating a second embodiment of the test apparatus of the present invention.

FIG. 4 is a schematic configuration diagram showing the arrangement of terminals, rotary switches and the like (operation unit) of the test apparatus of FIG.

FIG. 5 is a circuit diagram illustrating a third embodiment of the test apparatus of the present invention.

FIG. 6 is a circuit diagram illustrating a fourth embodiment of the test apparatus of the present invention.

FIG. 7 is a circuit diagram illustrating a fifth embodiment of the test apparatus of the present invention.

FIG. 8 is a circuit diagram illustrating a sixth embodiment of the test apparatus of the present invention.

FIG. 9 is a circuit diagram illustrating a seventh embodiment of the test apparatus of the present invention.

FIG. 10 is a schematic configuration diagram illustrating a conventional cable intermediate switching operation between stations.

[Explanation of symbols]

L1, L2, 1L1, 1L2, 2L1, 2L2 Core wires T1 to T4 Core wire connection terminals ST Sagittal wire connection terminals TM1 and TM2 Two external terminals TM3 and TM4 for connecting to a common tester Two conductor connection terminals for connecting a conductor resistance measuring instrument External terminals TM5, TM6 Two external terminals for connection of insulation resistance tester TM7 One external terminal for ground connection RSW Test item changeover switch RSW1 First circuit selector RSW2 Second circuit selector RSW3 Third circuit selector AT Continuity tester DT Conductor resistance measuring instrument ME Insulation resistance meter SW21 Core wire changeover switch SW41 Ground opening / closing switch SW42 Circuit opening / closing switch 101, 201, 301, 401, 501, 601, 7
01 Cable core switching test equipment

Claims (18)

[Claims] 1. Two core wire connecting terminals (T) connectable to a pair of core wires (L1, L2) of a cable to be tested.
1, T2), one sag wire connection terminal (ST), and two external terminals (TM1, TM2) for connecting the continuity tester.
And two external terminals (TM3,
TM4) and two external terminals (TM
5, TM6), one earth connection external terminal (TM7) for earth connection, and one of the sag wire connection terminal (ST) and one of the continuity tester connection external terminals (TM1). Circuit, and each circuit has at least 9 contacts, and all of the selectors for the first to third circuits (RSW1, RSW2, RSW3) move simultaneously and each contact in the three circuits switches simultaneously. Test item changeover switch (RSW)
A circuit connecting the terminal of the first circuit selector (RSW1) of the test item changeover switch (RSW) and one of the two core wire connection terminals (T1), and the test item changeover switch (RSW) ) Circuit for connecting the terminal of the second circuit selector (RSW2) and the other (T2) of the two core wire connection terminals, and the test item changeover switch (RSW)
And a circuit in which the terminal of the third circuit selector (RSW3) and the ground connection external terminal (TM7) are connected to each other, and the continuity tester is connected to the two external terminals (TM1 and TM2) on the measurement side. Connect the terminals and connect the two external terminals (TM3, TM
4) is connected to each terminal of the conductor resistance measuring device, each of the two external terminals (TM5, TM6) is connected to each terminal of the insulation resistance tester, and the one external terminal for grounding connection (TM) is connected.
7) is connected to the ground, the counterbore wire connecting terminal (ST) is connected to the counterbore wire, and the core wires (L1, L2) of the cable to be tested are connected to the two core wire connecting terminals (T1, T2). When connected, the contacts of the three circuits of the test item changeover switch (RSW) are switched at the same time, and in addition, in the following steps, by taking the corresponding conduction on the ejection side, OFF, the continuity test of the core wire L1-the counter wire is conducted. Circuit, core L2-circuit for continuity test, core L1-L2 conductor resistance measurement test, core L1-ground insulation resistance test circuit, core A circuit for an insulation resistance test between the line L2 and the ground and a circuit for an insulation resistance test between the core lines L1 and L2 are formed, and after the insulation resistance test according to any one of the above,
Before switching to the above circuit, in order to construct a circuit to release the electric charge charged in the core wire to the ground in the insulation resistance test, the three contact points of the test item changeover switch (RSW) are used at the same time as the 9 contacts. , Open each contact,
Alternatively, a cable core wire switching test device having a configuration in which a wire is connected to any of the external terminals (TM2 to TM6). 2. Four or more core wire connecting terminals (T1, T2 ...) Connectable to a plurality of core wires (1L1, 1L2 ...) Of a cable to be tested, and one sag wire connecting terminal. (ST) and two external terminals (T
M1, TM2), two external terminals (TM3, TM4) for connecting a conductor resistance measuring device, two external terminals (TM5, TM6) for connecting an insulation resistance tester, and one ground connection for grounding An external terminal (TM7), a circuit in which the counterbore wire connecting terminal (ST) is connected to one of the external terminals for connecting the continuity tester (TM1), and 3 circuits each having at least 9 contacts However, all the first to third circuit selectors (RSW1, RSW2, RSW3) move at the same time and each contact in the three circuits is switched simultaneously.
And a terminal of the first circuit selector (RSW1) of the test item changeover switch (RSW), and the test item changeover switch (RSW1).
SW) to the terminal of the second circuit selector (RSW2),
Of the core wires (1L1, 1L2 ...) Connected to the four or more core wire connection terminals (T1, T2 ...), each pair of two core wires has two circuits, and each circuit has the core wire connection terminal. A circuit connected via a core wire changeover switch (SW21) having a number of contacts forming a pair of core wires connected to each other, and a terminal of a third circuit selector (RSW3) of the test item changeover switch (RSW) And the external terminal for ground connection (T
M7) is connected to each of the terminals of the continuity tester on the measurement side, and the two external terminals (TM1 and TM2) are connected to the two external terminals (TM3 and TM).
4) is connected to each terminal of the conductor resistance measuring device, each of the two external terminals (TM5, TM6) is connected to each terminal of the insulation resistance tester, and the one external terminal for grounding connection (TM) is connected.
7) is connected to the ground, the countersunk wire connection terminal (ST) is connected to the countersunk wire, and the four or more core wire connection terminals (T1, T2 ...) Form a plurality of cores of the cable to be tested. Line (1L1, 1
L2 ...), the pair of core wires selected from the cables to be tested are switched by switching the core wire changeover switch (SW21), and the first circuit selector of the test item changeover switch (RSW) is selected. (RSW1) terminal and second circuit selector (RSW1)
It is turned off by connecting to the terminal of 2) and simultaneously switching each contact in the three circuits of the test item changeover switch (RSW) under the state, and taking the corresponding conduction on the ejection side in the following (1) to (3). , Core wire L1-circuit for conducting continuity test, core wire L2-circuit for conducting continuity test, core wire L1-L2 circuit for conductor resistance measurement test, core wire L1-ground And a circuit for an insulation resistance test between the core wire L2 and the ground, and a circuit for an insulation resistance test between the core wires L1 and L2 are formed. After the insulation resistance test of
Before switching to the above circuit, in order to construct a circuit to release the electric charge charged in the core wire to the ground in the insulation resistance test, the three contact points of the test item changeover switch (RSW) are used at the same time as the 9 contacts. , Open each contact,
Alternatively, a cable core wire switching test device having a configuration in which a wire connection is made to any of the external terminals (TM2 to TM6). 3. The number of the core wire connection terminals (T1, T2 ...) Is 4, and the terminals of the first circuit selector (RSW1) of the test item changeover switch (RSW) and the test item changeover switch (RSW). ) And the terminal of the second circuit selector (RSW2), each of the core wires (1L1, 1L2, 2L1, 2L2) connected to the four core wire connecting terminals (T1 to T4) forms a pair 2 The cable core wire switching test apparatus according to claim 2, wherein each core wire is a circuit in which two circuits are connected via a core wire selector switch (SW21) having two contacts. 4. The test item changeover switch (RSW) is a rotary switch.
The cable core wire switching test device according to any one of 2 and 3. 5. The rotary switch includes nine consecutive contacts to turn off, a core wire L1-a circuit for conducting a continuity test of the counter wire, a core wire L2-a circuit for conducting a continuity test of the counter wire, a core wire L1-. Circuit for conductor resistance measurement test of L2, circuit for releasing charge charged in core wires L1 and L2 to ground, circuit for insulation resistance test between core wire L1-ground, core wire L2-ground The circuit for the insulation resistance test, the circuit for the insulation resistance test between the core wires L1 and L2, the circuit for releasing the electric charges charged in the core wires L1 and L2 to the ground are set to be sequentially formed. The cable core wire switching test device according to claim 4, wherein 6. The two external terminals (TM1, TM2) are connected to the respective terminals of the continuity tester, and the two external terminals (TM3, TM3,
TM4) is connected with each terminal of the conductor resistance measuring instrument, two external terminals (TM5, TM6) are connected with each terminal of the insulation resistance measuring instrument, and a continuity tester, a conductor resistance measuring instrument and an insulation resistance measuring instrument are provided. The cable core wire switching test device according to any one of claims 1 to 5. 7. Two core wire connecting terminals (T) connectable to a pair of core wires (L1, L2) of a cable to be tested.
1, T2), one sag wire connection terminal (ST), and two external terminals (TM3, TM) for connecting a conductor resistance measuring device.
4) and two external terminals (TM5,
TM6), one earth connection external terminal (TM7) for earth connection, and one of the sag wire connection terminal (ST) and one of the external terminals for conductor resistance measuring instrument connection (TM3). Circuit, and each circuit has at least 6 contacts in each of the 3 circuits, and all of the first to third circuit selectors (RSW1, RSW2, RSW3) move at the same time and each contact in the 3 circuits simultaneously switches Test item selection switch (RSW)
A circuit connecting the terminal of the first circuit selector (RSW1) of the test item changeover switch (RSW) and one of the two core wire connection terminals (T1), and the test item changeover switch (RSW) ) Circuit for connecting the terminal of the second circuit selector (RSW2) and the other (T2) of the two core wire connection terminals, and the test item changeover switch (RSW)
Of the third circuit selector (RSW3) and a circuit in which the earth connection external terminal (TM7) is connected, and on the measurement side, the two external terminals (TM3, TM4) are connected to the conductor resistance measuring device. Connect each terminal and connect the two external terminals (TM5, T
M6) is connected to each terminal of the insulation resistance tester, the one ground connection external terminal (TM7) is connected to the ground, and the counterbore wire connection terminal (ST) is connected to the counterbore wire. When the core wires (L1, L2) of the cable to be tested are connected to the core wire connection terminals (T1, T2), the contacts of the three circuits of the test item changeover switch (RSW) are switched at the same time. In the ejection side, by taking the corresponding conduction, the circuit for conducting the continuity test of the core wire L1-the counter wire, the circuit for conducting the continuity test of the core wire L2-the counter wire, the conductor resistance measurement test of the core wires L1-L2 A circuit for insulation resistance test between core wire L1 and ground, a circuit for insulation resistance test between core wire L2 and ground, a circuit for insulation resistance test between core wires L1 and L2, So that the test item changeover switch (RSW) is switched to three circuits at the same time so that each contact is opened,
Alternatively, a cable core wire switching test apparatus having a configuration in which a wire is connected to any of the external terminals (TM3 to TM6). 8. The cable core wire switching test apparatus according to claim 7, wherein each of the two core wire connection terminals (T1, T2) is a grounding open / close switch (SW4) that normally forms an off circuit.
1) A cable core wire switching test device characterized in that it is connected to a ground terminal (TM7) through the interposition of 1). 9. The cable core wire switching test apparatus according to claim 7, wherein the two external terminals (TM3, TM) are used.
When each terminal of the conductor resistance measuring device is connected to 4) and each terminal of the insulation resistance meter is connected to the other two external terminals (TM5, TM6), the core wire connecting terminal (T1) and the counterbore wire connecting terminal (ST), and the core wire connection terminal (T2) and the counterbore wire connection terminal (S
Circuit open / close switch (SW42) to prevent the continuity from being maintained via the wiring inside the conductor resistance measuring instrument
A cable core wire switching test device characterized by being provided with. 10. The cable core wire changeover test device according to claim 7, wherein the test item changeover switch (RSW) is a rotary switch, and the continuous contact points are changed over so that The cable core wire switching test device is characterized in that the circuits are sequentially formed. 11. The cable core wire changeover test apparatus according to claim 7, wherein the test item changeover switch (RSW) is replaced by one having three circuits and each circuit having at least six contacts. It is assumed that each of the three circuits has at least 7 contacts, and the three circuits of the test item changeover switch (RSW) are simultaneously switched so that the above-mentioned circuits are formed.
Instead of using the contact, after forming the circuit of (1) and forming a circuit for the insulation resistance test of any of (1) to (3), before switching to the formation of the circuit of (3), the insulation In order to form a circuit for releasing the electric charge charged in the core wire to the ground in the resistance test, seven contacts that are simultaneously switched with the three circuits of the test item changeover switch (RSW) are used, and each contact is opened or External terminal (TM3 ~
A cable core switching test apparatus having a configuration in which a wire connection is made to any one of TM6). 12. The cable core wire change-over test device according to claim 7, wherein the test item changeover switch (RSW) is replaced by one having three circuits and each circuit having at least six contacts. It is assumed that each of the three circuits has at least 7 contacts, and the three circuits of the test item changeover switch (RSW) are simultaneously switched so that the above-mentioned circuits are formed.
Instead of using the contacts, the three circuits of the test item changeover switch (RSW) are simultaneously formed so that the circuits of (1) to (3) are formed, and an OFF circuit which is not any of the circuits of (1) to (3) is formed. A cable core wire switching test apparatus having a configuration in which seven contacts that are switched are used, and each of the contacts is connected to either an open terminal or an external terminal (TM3 to TM6) by wiring. 13. The cable core wire changeover test device according to claim 7, wherein the test item changeover switch (RSW) is replaced by one having three circuits and at least six contacts in each circuit. It is assumed that each of the three circuits has at least eight contacts, and the three circuits of the test item changeover switch (RSW) are simultaneously switched so that the circuits of (1) to (6) are formed.
Instead of using the contact, after forming the circuit of the above-mentioned and forming a circuit for the insulation resistance test of any of the above-mentioned, before switching to the formation of the circuit of the above-mentioned In the resistance test, a circuit for releasing the electric charge charged in the core wire to the ground is formed, and further, an OFF circuit which is not any of the above circuits is formed so that the test item changeover switch (RSW) 3 A cable core wire switching test apparatus having a configuration in which eight contacts that are switched simultaneously with a circuit are used, and each of the contacts is open or connected to one of external terminals (TM3 to TM6) by wiring. 14. The cable core wire changeover test apparatus according to claim 13, wherein the test item changeover switch (RS
W) is used as a rotary switch, and by switching the continuous contacts, the following
The cable core wire switching test device is characterized in that the circuits are sequentially formed. OFF, circuit for continuity test of core wire L1-counterbore line, circuit for continuity test of core wire L2-counterline wire, circuit for conductor resistance measurement test of core wire L1-L2, core wires L1, L2 Circuit for releasing the electric charge charged to the ground to the ground, circuit for insulation resistance test between core wire L1 and ground, circuit for insulation resistance test between core wire L2 and ground, insulation between core wires L1 and L2 Circuit for resistance test, 15. The cable core wire switching test apparatus according to any one of claims 7 to 14, wherein each of the terminals of the conductor resistance measuring device is connected to two external terminals (TM3, TM4). A cable core wire changeover test device comprising a conductor resistance measuring instrument and an insulation resistance meter by connecting each terminal of the insulation resistance meter to the terminals (TM5, TM6). 16. The cable core wire switching test apparatus according to any one of claims 7 to 15, wherein an external terminal for connecting the conductor resistance measuring device is (TM3, T
Instead of two of (M4), (TM1, TM2, TM3, T
M4) is provided, and instead of the circuit in which the counterbore wire connection terminal (ST) and one of the external terminals (TM3) for connecting the conductor resistance measuring device are connected, the counterbore wire connection terminal (ST) And a circuit for connecting one of the external terminals (TM1) for connecting the conductor resistance measuring device to each other, and the two external terminals (TM3, TM) are provided on the measurement side.
In place of connecting each terminal of the conductor resistance measuring device to 4),
While connecting each terminal of the continuity tester which is a conductor resistance measuring device to the two external terminals (TM1, TM2), connecting each terminal of the conductor resistance measuring device to the two external terminals (TM3, TM4), Further, instead of wire-connecting each contact of the test item changeover switch (RSW) to one of the external terminals (TM3 to TM6),
A cable core wire switching test device having a configuration in which it is open or is connected to any one of external terminals (TM2 to TM6). add to 17. The cable core wire changeover test device according to claim 1, wherein the test item changeover switch (RSW) is replaced by one having three circuits and each circuit having at least nine contacts. It is assumed that each of the three circuits has at least eight contacts, and that the three circuits of the test item changeover switch (RSW) are simultaneously switched so that the circuits of to are formed.
Instead of using a contact, the circuit of ~ is formed, and after the insulation resistance test of any of the ~, before switching to the circuit of ~, the core wire was charged in the insulation resistance test. Eight contacts that are switched simultaneously with the three circuits of the test item changeover switch (RSW) are used so that a circuit for discharging the charges to the ground is formed, and each contact is opened or the external terminals (TM2 to TM6) are connected. A cable core switching test device having a configuration in which wiring is connected to one of them. 18. The cable core wire changeover test device according to claim 17, wherein the test item changeover switch (RSW) is a rotary switch, and the circuits (1) to (2) are sequentially formed by switching continuous contact points. Cable core wire switching test device characterized by being set to