JPH0581869B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a connection testing method for a communication cable connection section, which tests the connection of a connection section of a multi-pair communication cable connected by a multi-pair connector.

"Prior Art" In recent years, in communication cable connection work, for example, switching connectors disclosed in Japanese Patent Application Laid-Open No. 61-24181 or electrical connectors described in Utility Application No. 104512-1980 have been used. Connections are increasingly being made using modular multi-pair connectors in which a plurality of contacts are arranged.

In the device disclosed in Japanese Patent Application Laid-Open No. 61-24181, the connector halves 2 and 3 are connected by fitting the connector halves 2 and 3, which are constituent members of the multi-pair connector 1 shown in FIG. Connect the L-shaped conductors 4 to each other,
The core wires 5 of the multi-pair communication cables connected to these connector halves 2 and 3 are connected to each other. By connecting the external continuity probe 22 to the L-shaped conductor 4 of one connector half 3, the connection between the external continuity probe 22 and the other end of the core wire 5 is established. It is possible to check continuity between the L-shaped conductor 4 (and thus the core wire contact 8) and the core wire 5. Since the connector half body 2 and the connector half body 3 have the same configuration, the connector half body 2 will be mainly described next, and the description of the connector half body 3 will be omitted.

Connector half 2 consists of connector body 6 and L-shaped conductor 4
and cover 7.

The connector body 6 is a substantially rectangular parallelepiped insulator having a recess 6a, in which the L-shaped conductor 4 is embedded. The tip of the vertically rising portion of the L-shaped conductor 4 forms a core wire contact 8. This core wire contact 8 has a U having a width slightly narrower than the electrical conductor (hereinafter simply referred to as a conductor) of the core wire 5 to be connected.
A character-shaped groove (slit) 9 is provided, and when the core wire 5 is pushed into the slit 9, its jacket is torn and the conductor of the core wire 5 is connected to the L-shaped conductor 4.

Further, the distal end side of the horizontal portion of the L-shaped conductor 4 also protrudes from the side surface of the connector body 6, and the contact 1
0, and can be detachably connected to the contact 10 on the tip side of the horizontal portion of the L-shaped conductor 4 of the mating connector half 3. That is, the horizontal portions of both connector halves 2 and 3 are formed into three contact pieces 12 and 1 by two grooves (slits) 11.
3 and 14, and when both connector halves 2 and 3 are fitted together, the center contact piece 13 has the contact 10 of the connector half 3 on top of the contact 10 of the connector half 2, and the left and right contact piece 12
and 14, the contact 10 of the connector half 3 is under the contact 10 of the connector half 2, and they are brought into pressure contact with each other by the action of their own springs, so that they can maintain electrical continuity. . Moreover, if both connector halves 2 and 3 are pulled left and right, they will be separated. Note that the connector half body 2 and the connector half body 3 are L in the direction perpendicular to the plane of the paper in FIG.
It is a multiple type conductor in which a large number of letter-shaped conductors 4 are arranged side by side.

In order to connect the core wires 5 of the multi-pair communication cable to the multi-pair connector 1, a core wire connecting tool 15 shown in FIGS. 5 to 7 is used.
The excess length of the core wire 5 is cut off when the core wire 5 is connected.

The core wire connection tool 15 has a plurality of pressing members 17 protruding from the lower surface of a rod-shaped tool main body 16, and a cutter 18 at a position offset from the pressing members 17 in the width direction (lateral direction) of the tool main body 15. It has been established.

The pressing members 17 are formed in a plate shape, and are arranged in a line at equal pitches P along the longitudinal direction of the tool body 16 with the plate surfaces perpendicular to the longitudinal direction of the tool body 16.

The cutter 18 consists of two slide plates slidably provided in a groove 19 provided on the lower surface of the tool body 16 along its longitudinal direction, with the plate surfaces perpendicular to the width direction of the tool body 16. 20, 21, and the core wires 5 are provided along the lower edges of these slide plates 20, 21 at equal pitches P and protrude in the same direction as the protruding direction of the pressing member 17.
It consists of a plurality of shearing blades 20a, 21a extending in the projecting direction by a dimension l larger than the diameter d of the blade. In their standby positions, the shearing blades 20a, 21a are arranged at positions offset from each other in the longitudinal direction of the tool body 16, as shown in FIG. 5, and are located on both sides of the pressing member 17 in FIG. The shearing blades 20a and 21a function as a pair of mutually interlocking blades, that is, scissors, and can cut the excess length of the core wire 5.

Next, the case where the extra length of the core wire 5 is cut will be explained. In this case, the core wire contacts 8 of the connector half body 2 are placed on the upper surface of the connector body 6 at an even pitch P.
First, as shown in FIG. 5 and FIG.
After setting the wires 0a and 21b to the standby position, the orientation of the wire connecting tool 15 with respect to the core wire 5 is adjusted so that the cutter 18 is located on the extra length side of the core wire 5 with respect to the pressing member 17. Then, after aligning the core wire connecting tool 15 with respect to the connector half body 2 so that each pressing member 17 is located above each core wire contact 8, when the core wire connecting tool 15 is lowered, the pressing member 17 presses the core wire 5 downward and moves it to the seventh
As shown in the figure, push it into the lower core wire contact 8 and connect it to the core wire contact 8, while the shearing blades 20a, 21a of the cutter 18 sandwich it on both sides of the extra length of each core wire 5. To position.

Next, both slide plates 20 and 21 of the cutter 18
are slid in opposite directions in the direction in which they are lined up, and the extra length of the core wire 5 is cut by the plural sets of shearing blades 20a, 21a as shown in FIG. As a result, the extra length of each core wire 5 connected to the core wire contact 8 is trimmed to the same extra length. Figures 3 and 4
5a shown in the figure is an extra length cut end.

After cutting off the excess length of the core wire 5, the connector halves 2 and 3 are fitted together to connect the L-shaped conductors 4 and 4, and the cover 7 is attached to the connector body 6 to complete the connection. By fitting the external continuity probe 22 to the L-shaped conductor 4 of the connector half 2, the external continuity probe 22 is connected to the other end of the core wire 5 (a connector is similarly connected to the other end of the connector). It is possible to check the electrical continuity between the core wire contact 8 and the core wire 5 (via an external continuity probe fitted to the corresponding L-shaped conductor 4).

In addition, external continuity probes are attached to the connector halves 2 and 3 from above the individual L-shaped conductors 4 of the connector halves 2 and 3 so that conduction can be established with the individual L-shaped conductors 4 from the outside. 22, a spring type pin probe 22a, shown in phantom in FIG. 3, can be inserted into the connector halves 2, 3 from the bottom or back and brought into contact with the individual L-shaped conductors 4. Therefore, the connector body 6 has insertion holes so that the spring-type pin probe 22a can be inserted up to the L-shaped conductor 4, and the curve 7 has insertion holes so that the external continuity probe 22 can be inserted into the groove 9 of the L-shaped conductor 4. is formed (the above is the first conventional example).

In addition, as shown in FIG. 8, in Utility Application No. 59-104512, the insulating boxes 32a and 33a of the rod-shaped connector halves 32 and 33 of the multi-pair connector 31 are respectively L-shaped as shown in FIG. Contacts 34, 35
are alternately arranged in parallel in the longitudinal direction of the insulating boxes 32a and 33a, and electric wires (core wires) are connected to the grooves 36a of each terminal portion 36 of the contacts 34 and 35.
Covers 37, 37 are attached to a, 33a, the connector half body 32 and the connector half body 33 are fitted together, and the electric wires (core wires) and each of the connector half body 33 are attached to each terminal portion 36 of the connector half body 32. The electric wire (core wire) attached to the terminal portion 36 is connected thereto.

The contacts 34 are connected to the substrate 3 as shown in FIG.
A first contact 39 provided at the center of one end of 8
, a contact piece part 42 having a second contact 40 and a third contact 41 connected in parallel to the left and right sides thereof, and a terminal part 36 connected to this. be. Contact 34 and Contact 3
The contact 35 has the same shape as the insulating box 32a, 33a, respectively, with the contact piece 42 of the contact 35 being turned over with respect to the contact piece 42 of the contact 34.
is attached to. Moreover, the insulating box 32a and the insulating box 33a are of the same shape. and,
Contacts 34 and 35 of one connector half 32
Contacts 35, 3 of the other connector half 33
4, the connector halves 32 and 33 are fitted together, and the core wires are attached to each terminal portion 36 of the connector half body 32 as described above, and the core wires are attached to each terminal portion 36 of the connector half body 33. It is designed to connect. Note that 43 is an insulating partition (the above is the second conventional example).

By the way, in testing the connection quality of communication cables in these multi-pair connector connections, in order to test the connection quality only for the connection part, it is necessary to conduct a continuity test between the core wire of the cable and the contacts of the multi-pair connector. However, since it is not allowed to damage the core wire in order to perform this continuity test, the core wire must be connected between the other end of the core wire connected to the multi-pair connector and the external continuity probe of the connector. Continuity tests between wires and contacts shall be performed.

Therefore, with the connector halves of the multi-pair connector attached to both ends of the multi-pair communication cable, a continuity test was conducted between the core wire and the contacts via the external continuity mechanism provided on each contact of these connector halves. Alternatively, after connecting multiple cable pieces (including connections at multiple locations in between), a continuity test is performed at both ends of the multiple cable pieces.

"Problem to be Solved by the Invention" However, according to the connection test method for multi-pair communication cable connection parts, when connection work is performed at a certain multi-pair communication cable connection point, the connection test is performed immediately at that point. Since it is not possible to judge whether the connection is good or bad at each location, a worker is placed at the same time at two locations where the multi-pair communication cable is connected (manhole, etc.) for the connection test, and the worker at these two locations conducts the connection test. If the need arises, and depending on the connection test method for multi-pair communication cable connections described above, a connection failure at an intermediate connection point is detected,
After placing a worker at this intermediate connection point and reconnecting the cable, the communication cable connection test is performed again using the same method as the first time to check whether the connection is good or not. All of the test methods had the problem of causing a large amount of operational and time loss for the test.

The present invention solves the above-mentioned problems of the conventional communication cable connection test method, and provides a communication cable connection part that can test the quality of the connection only at the connector connection point at the end of the communication cable. The purpose is to provide a connection test method.

"Means for Solving the Problem" In order to achieve the above object, the present invention attaches connector halves each having a plurality of contacts each having a slit to the ends of a multi-pair communication cable to be connected to each other. , in a connection test method for a communication cable connection part, which tests the connection part of a multi-pair communication cable connected by fitting these connector halves together, one connector half and the other connector half of the connection. At the same time, the probe for contact conduction is brought into contact with the contact of the connector half in the disconnected state, and at the same time, the excess length of the core wire of the multi-pair communication cable that has been inserted into the slit and connected to the contact is cut off. A core wire continuity probe is brought into contact with the contact conduction probe and the core wire continuity probe is checked for electrical continuity between the contact conduction probe and the core wire continuity probe to test whether the connection between the contact and the core wire is good or not.

"Operation" According to the present invention, at the connection point of a multi-pair connector, a contact continuity probe and a core wire continuity probe are simultaneously applied to each contact of the connector half and each core wire (extra length cut end). Therefore, when performing connection work (connector attachment) at the connection point of a multi-pair communication cable by checking the electrical continuity between the contact continuity probe and the core wire continuity probe, At that point, it is possible to immediately determine whether the connection is good or bad at that connection point, thereby preventing operational and time losses due to connection tests of communication cable connections.

In addition, in the method of conducting a continuity test between both ends of multiple cable pieces after connecting multiple cable pieces, if a connection failure is detected at an intermediate connection point, the connection at this intermediate connection point must be re-connected. It is possible to immediately determine whether the connection is good or bad at the connection point, thereby preventing the occurrence of operational and time losses due to connection testing of the communication cable connection section.

"Embodiment" Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the same reference numerals are given to the same parts as in the first conventional example to simplify the explanation thereof.

FIG. 1 shows a connector half 2 and a cable connection test adapter 51 constituting a multi-pair connector 1 used to carry out the method of the present invention.

The cable connection test adapter 51 includes an adapter body 52, a plurality of contact continuity probes 53 and a plurality of core conduction probes 54 attached to the adapter body 52, and a contact continuity probe 54 connected to the contact continuity probe 53. It consists of a lead 53a and a core conduction lead 54a connected to a core conduction probe 54.

The adapter body 52 has a shape in which a guide plate 55 is integrally provided at the lower end of a rectangular parallelepiped and projects in a direction perpendicular to the longitudinal direction of the rectangular parallelepiped (the direction perpendicular to the plane of the paper shown in FIG. 1). It is said that

The adapter body 52 includes a contact conduction probe 5 connected to the plurality of contacts 10 of the connector half body 2.
3 is the excess length cut end 5 of the core wire 5 which is fitted into the slit 9 of the connector half 2 and connected to the L-shaped conductor 4.
When the connector main body 6 is placed on the guide plate 55 in order to bring the core conduction probes 54 into contact with the respective contacts 10, first through holes 56 are formed at positions facing the ends of the respective contacts 10, A second through hole 57 is formed at a position facing the extra length cut end 5a of each core wire 5.

Rod-shaped contact conduction probes 53 having heads 53b are fitted and fixed in the plurality of first through holes 56, and heads 54b are fitted in the plurality of second through holes 57.
A rod-shaped core conduction probe 54 having a diameter is fitted and attached. This wire conduction probe 54 is a spring-type pin probe in which the head 54b is biased toward the excess length cut end 5a of the core wire 5 of the connector half 2 in FIG. 1 by a biasing mechanism (not shown). There is.

To test the connection between the contact 10 of the connector half 2 and the core wire 5, as shown in FIG. At the tip, cable connection test adapter 51
The head 53b of the contact continuity probe 53
Then, the connector half 2 of the multi-pair connector 1 is placed on the guide plate 55 with the head 54b of the core conduction probe 54 facing the cut end 5a of the core wire 5.

The adapter body 52 is moved relative to the contact half 2 in the directions of arrows A and B shown in FIG.
At the same time, the head 54b of the core wire continuity probe 54 is brought into contact with the extra length cut end 5a of the core wire 5.

At this time, since the extra length of the core wire 5 is short and is usually several mm or less, even if the core wire continuity probe 54, which is a spring-type pin probe, is pressed against the core wire 5, the core wire 5 It has enough strength to prevent the core wire 5 from escaping, and the biasing force of the core wire continuity probe 54 is such that the required contact force between the core wire 5 and the core wire continuity probe 54 is several tens of grams. Although the following weak pressing force is sufficient, it is sufficiently strong, and therefore, the core wire 5 and the core wire continuity probe 54 are in a sufficiently stable electrically conductive state.

Electrical continuity between the contact continuity lead 53a and the core conduction lead 54a is checked using an external continuity tester (not shown).

The connection test between the core wire 5 connected to the connector half body 2 and the contact 10 of the connector half body 2 has been described above.
The connection test with 0 may also be performed in the same manner as described above.

According to this embodiment, at the connection point of the multi-pair connector 1, each contact 10 of the multi-pair connector
The contact conduction probe 53 and the core wire conduction probe 54 can be simultaneously brought into contact with the extra length cut end portion 5a of each core wire 5, respectively.

Therefore, immediately after attaching the connector to the cable core 5, it is possible to immediately conduct a test to determine whether or not the connection of the core wire 5 to the connector is good.

As a result, when connection work is performed at a connection point of a multi-pair communication cable, it is possible to immediately judge whether the connection is good or bad at that point, and this makes it possible to immediately determine whether the connection is good or not. , prevent the occurrence of time loss.

The relationship among the core wire 5, the contact 10, the contact continuity probe 53, and the core wire continuity probe 54 in the connection test state of the connection portion between the core wire 5 and the contact 10 of the multi-pair connector 1 using the cable connection test adapter 51. The second diagram shows the outline of
It will look like the figure. That is, the tips of contact conduction probes 53 are opposed to the tips of a large number of interconnected contacts 10 of the multi-pair connector 1, and the probes 54 for contact continuity are opposed to the tips of a large number of interconnected core wires 5, respectively. A connection test of the communication cable connection part is performed with the ends facing each other.

In addition, when conducting a continuity test between connectors connected to both ends of multiple cable pieces after connecting multiple cable pieces, the following method described in Japanese Patent Application No. 1983-25191 previously filed by the applicant may be used. Continuity tests can be performed using a communication cable testing device configured as follows.

That is, a connecting means is connected to one of the connectors and connects each contact of the connector to the main body of the transmitting tester, a voltage generating means generates a constant voltage, and an output voltage of the voltage generating means is connected to the transmitting side tester body through the connecting means. a transmitting side tester having a switching means for sequentially supplying the contacts to the contacts of the connector, and a connecting means connected to the other side of the connector and connecting each contact of the connector to the receiving side tester main body;
Each contact of the other connector is obtained through a level determining means such as a comparator that determines the magnitude of the generated voltage level and the reference voltage level, and a connecting means that connects the contacts of the other connector to the receiving tester main body. A communication cable connection testing device is installed from a receiving side tester comprising switching means for sequentially supplying voltage levels to the level determining means and display means for displaying the voltage level of each contact determined by the level determining means. Configure.

Then, the transmitting side tester sequentially supplies a constant voltage to each contact of one connector of the connector attached to both ends of the communication cable that has a connecting part in the middle, and the receiving side tester applies a constant voltage to each contact of the other connector. It is possible to sequentially check the voltage and display the results, and from this display, it is possible to easily detect disconnections, kneading, short circuits, etc. of each core wire of the multi-pair communication cable.

In this case, the connection quality of a large number of connections can be tested in a short time, and if a connection failure at an intermediate connection point is detected, the connection at this intermediate connection point can be re-connected. As soon as the connection is made, it is possible to judge whether the connection is good or bad at that connection point, so in this case, the connection quality of the many connection points of the communication cable can be tested in a shorter time than before, and the communication It is possible to prevent operational and time losses due to connection tests of cable connections.

The test method described in the above Japanese Patent Application No. 63-25191 is applied to the contact continuity probe 53 and the core conduction probe 54 shown in FIG. 2 in the present invention.
(For the number of multiple core wires connected to one connector each)
By applying this method between the multi-pair connector halves, it is possible to easily and quickly detect disconnections, cross-wires, etc. of each core wire connected to a multi-pair connector half. In other words, when conducting a continuity test between connectors connected to both ends of a cable piece as described above, Japanese Patent Application No. 63-25191
By connecting the transmitting side tester of the test device described in the above item to each contact of the connector at one end of the cable, and the receiving side tester to each contact of the connector at the other end of the cable, through connecting means, respectively, A multi-pair wire connection test is performed, and in the connection test of the connecting portion of the connector half at one end of the cable shown in FIG. 2 in the present invention, the transmitter side tester and the receiver side tester are By connecting the probe 53 and the core conduction probe 54 (or vice versa), it is possible to test whether the connection between each contact of the connector half and each core wire is good or not.

"Effects of the Invention" According to the present invention, at the connection point of a multi-pair connector, a probe for contact continuity and a probe for conduction of core wire are simultaneously applied to each contact of the connector half and the cut end of the extra length of each core wire. Since the probe can be electrically conductive, connection work (connector attachment) can be performed at the connection point of the multi-pair communication cable by checking the electrical continuity between the contact continuity probe and the core wire continuity probe. In this case, it is possible to immediately determine whether the connection is good or bad at that point, and thereby it is possible to prevent operational and time losses due to the connection test of the communication cable connection section.

In addition, in the method of conducting a continuity test between both ends of multiple cable pieces after connecting multiple cable pieces, if a connection failure is detected at an intermediate connection point, the connection at this intermediate connection point must be re-connected. It is possible to immediately judge whether the connection is good or bad at the connection point, and in this case, the connection quality of the connection point of the communication cable can be tested in a shorter time than before, and the connection test of the connection point of the communication cable can be performed. Therefore, it is possible to prevent the occurrence of operational and time losses, and as a whole, it is possible to save labor and improve the efficiency of the connection test of the connection part of the communication cable.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a connector half and a cable connection test adapter that constitute a multi-pair connector used to implement the method of the present invention, and FIG. 2 is a cable connection test adapter used to implement the present invention. 3 and 4 are schematic explanatory diagrams showing the relationships among the core wires, contacts, probes for contact continuity, and probes for core wire continuity in a connection test state according to the present invention. Fig. 3 is a sectional view of both connector halves constituting the connector, Fig. 4 is a perspective view of both L-shaped conductors and an external continuity probe, and Fig. 5 is a perspective view of both L-shaped conductors and an external continuity probe. Figures 7 through 7 show a wire connection tool for cutting the excess length of the core wire of a communication cable connected to a connector used in the implementation of the present invention, and Figure 5 is a partially omitted front view. , Fig. 6 is a partially cutaway sectional view, Fig. 7 is a side view showing the state when the excess length of the core wire of the communication cable is cut, and Figs. 8 and 9 show an example of a conventional electrical connector. FIG. 8 is a perspective view, and FIG. 9 is a perspective view of the contact. 1... Multi-pair connector, 2, 3... Connector half, 4... L-shaped conductor, 5... Core wire, 5a... Excess length cut end, 8... Core wire contact, 9... Groove ( 10... contact, 51... cable connection test adapter, 53... contact continuity probe, 53a... contact continuity lead, 54... core wire continuity probe, 54a... core wire continuity lead.

Claims (1)

[Claims] 1 Connector halves 2 and 3 each having a plurality of contacts 10 each having a slit 9 are attached to the ends to be connected to each other of a multi-pair communication cable, and these connector halves are fitted together. In the method for testing the connection of a connected multi-pair communication cable by performing a connection test on a connected part of a multi-pair communication cable, in a state where one connector half 2 and the other connector half 3 of the connection part are not connected At the same time as the contact continuity probe 53 is brought into contact with the contact 10 of the connector half, the excess length cut end 5a of the core wire 5 of the multi-pair communication cable is inserted into the slit and connected to the contact, and the excess length is cut off.
A communication cable characterized in that a core wire continuity probe 54 is brought into contact with the contact conduction probe 54 to check electrical continuity between the contact continuity probe and the core wire continuity probe to test whether the connection between the contact and the core wire is good or not. Connection test method for connections.