JPH0945451A - Multi-conductor cable connection method to terminal block, and wire holder for connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve crosstalk characteristics in connection of a multi-conductor cable to a terminal block. SOLUTION: A cable holder 30 is installed on a tip of a multi-conductor cable. On the wire holder 30, a pair wire containing part 33 is formed to contain twisted pair wires 22 without being untwisted, and wire containing grooves 35 are formed continuously from the part 33 for inserting insulated wires 23 one by one to be held. Double-coated adhesive tape 34 is provided on the pair wire containing part 33, so that wires 22 can be temporarily held. A receiving member 31 is closed by a cover member 32, thereby the insulated wires 23 can be held as they are set in parallel at a specified interval.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multicore cable connecting method for connecting a multicore cable to a terminal board and an electric wire holder therefor.

[0002]

2. Description of the Related Art For example, an information line connecting each information device terminal such as a telephone in a building is constructed by installing a terminal board on each floor and connecting all the information equipment terminals on the floor to the terminal board. To be done. The connection structure to the terminal board will be described below with reference to FIGS. 12 to 14. The terminal board 1 has a structure in which a large number of pressure contact terminals 2 are arranged in a row in a horizontal direction in the figure on a panel 1a, and the pressure contact terminal groups 2 are vertically arranged at a plurality of stages at predetermined intervals. The multi-core cable 3 is laterally inserted between the groups of the pressure contact terminals 2 arranged vertically, and the insulated wires 3 a are connected to the pressure contact terminals 2 respectively.
It is designed to be pressure-welded and connected.

The multi-core cable 3 used in this type of wiring structure is a twisted pair in which two insulated electric wires 3a are twisted as a pair as shown in FIG. 13 in order to minimize crosstalk. A plurality of electric wires are housed in the jacket 3b. Therefore, in the connection portion to the press contact terminal 2, first, the outer sheath 3b is peeled off to expose the twisted pair electric wire as shown in FIG. 14 (A), and then the twisted pair electric wire is untwisted as shown in FIG. 14 (B). Then, as shown in FIG. 12, the pressure contact terminals 2 were connected by pressure contact.

[0004]

However, in the above connection method, since the twist of the twisted pair electric wire has to be unraveled in a relatively long range, crosstalk at that portion cannot be avoided and the crosstalk characteristic is deteriorated. There was a problem of doing. In addition, the twist of the twisted pair wire is untwisted, and many insulated wires are in a complicated state, which makes it difficult to know which insulated wire should be connected to which pressure contact terminal, and it takes time to identify them. There was also a problem that the construction time would be long.

The present invention has been made in view of the above circumstances, and an object thereof is to obtain an excellent crosstalk characteristic, and another object is to prevent confusion of a large number of electric wires and reduce a construction time. An object of the present invention is to provide a method for connecting a multi-core cable to a terminal board that can be shortened and an electric wire holder suitable for the method.

[0006]

[Means, actions and effects for solving the problems]

<Invention of Claim 1> A method of connecting a multi-core cable to a terminal board according to the invention of claim 1 comprises a twisted pair electric wire in which insulated wires are twisted with a plurality of pressure contact terminals arranged in a row on the terminal board. It is a method of crimping a multi-core cable, and at the tip of the multi-core cable, accommodate the twisted pair electric wire along the extension direction of the multi-core cable, and match each insulated electric wire with the row interval of each crimping terminal. It is characterized in that an electric wire holder made of an insulating material that is drawn out in a side-by-side state is mounted, and the tip end of the insulated electric wire protruding from the electric wire holder is pressed against the pressure contact terminal.

According to this connection method, since the twisted pair electric wire is accommodated in the extension direction of the multi-core cable without being untwisted by the electric wire holder, it is possible to prevent crosstalk as much as possible. . Also, since each insulated wire protrudes from the wire holder according to the gap between the pressure contact terminals, the insulated wire group can be collectively applied to the pressure contact terminals, greatly improving the workability of the pressure contact work. You can

<Invention of Claim 2> According to the invention of Claim 2, when a multi-core cable composed of a twisted pair electric wire in which insulated electric wires are twisted is pressure-welded to a plurality of pressure-welded terminals arranged in a row on a terminal board. An electric wire holder made of an insulating material, which is attached to the tip of a multi-core cable, and which houses a twisted pair electric wire in a twisted state along a row direction of a pressure contact terminal and a pair electric wire accommodating recess, and this pair. The insulated wires extend from the electric wire accommodating concave portion in a direction orthogonal to the direction in which the pressure contact terminals are arranged, and are arranged at intervals corresponding to the interval in which the pressure contact terminals are arranged.
The present invention is characterized in that it is provided with an electric wire accommodating groove for accommodating one by one, and a lid member that is mounted in a state in which electric wires are accommodated in the pair electric wire accommodating recess and the electric wire accommodating groove, respectively.

The electric wire holder of the present invention is used for carrying out the connection method according to the above-mentioned claim 1, in which the twisted pair electric wires are accommodated in the pair electric wire accommodating recesses in a twisted state, and from here, the twisted pair electric wires are orthogonally arranged toward the respective pressure contact terminals. 1 bent insulated wire
The form is derived one by one. Therefore, the untwisted portion has an extremely short length, and crosstalk is less likely to occur. In addition, by mounting this wire holder on the tip of the multi-core cable in advance, at the construction site, simply arrange the multi-core cable along the pressure contact terminal group and separate each insulated wire led out from the wire holder. It may be addressed to the pressure contact terminal. In this case, the twisted pair electric wire and each insulated electric wire are fixed by the lid member, and furthermore, each insulated electric wire is held in the electric wire accommodation groove arranged at a predetermined interval and arranged at intervals according to the arrangement interval of the pressure contact terminals, The insulated wire group can be collectively applied to the pressure contact terminal, and the workability of the pressure contact work can be greatly improved.

<Invention of Claim 3> The invention of Claim 3 is characterized in that, in the electric wire holder of Claim 2, the electric wire receiving groove is set to have a shape in which an opening edge portion is narrower than the inside of the groove. Have. With such a configuration, when the insulated wire is housed so as to be press-fitted into the wire housing groove, the insulated wire is easily held in the groove, which facilitates the work of mounting the wire holder. Workability can be further enhanced.

<Invention of Claim 4> The invention of Claim 4 is characterized in that the wire holder is provided with an identification mark for identifying the insulated wire to be housed, corresponding to each wire housing groove. . With this configuration, when each insulated wire is housed in the wire housing groove, it can be housed in the predetermined wire housing groove without making a mistake, and it is possible to prevent connection mistakes to the press-connecting terminal, thus improving workability. Contribute to improvement.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a partial structure of a general terminal board 10 of the AT & T standard, for example. A plurality of leg portions 12 are erected on both left and right sides of a synthetic resin panel portion 11, and a large number of pressure contact terminals 13 are arranged in a row along the left-right direction across the leg portions 12. , This is in a form in which it is located in a plurality of upper and lower stages. Therefore, between the pressure contact terminal rows 14 located at the upper and lower sides is a groove shape that extends to the left and right, and this serves as a cable housing groove 15 for housing a multi-core cable. Each press-connecting terminal 13 has a vertically extending electric wire accommodation groove, and for example, a connecting block 16 that is collectively attached to the eight press-connecting terminals 13. The connection block 16 is provided with a pressure contactor 17 corresponding to each pressure contact terminal 13, and when the pressure contactor 17 is inserted into the pressure contact terminal 13 to attach the connection block 16, the pressure contact terminal 17 is attached. The insulated wire addressed to 13 is pushed into the pressure contact terminal 13 to perform pressure contact connection.

Next, the multicore cable 20 connected to the terminal board 10 will be described. As shown in FIG. 2, this is, for example, four twisted pairs in an outer cover 21 formed of a flexible synthetic resin tube. The electric wire 22 is accommodated, and the twisted pair electric wire 22 has a general structure in which two insulated electric wires 23 are twisted together. In this embodiment, each twisted pair electric wire 22 adopts the category 5 specifications used for a computer LAN.

An electric wire holder 3 is attached to the end of the multi-core cable 20.
0 is installed. This electric wire holder 30 is shown in detail in FIG. 2 and subsequent figures. For example, the jacket 2 of the multicore cable 20 is shown.
A relatively flexible vinyl chloride resin used for the first and the like, and a receiving member 31 which is a rectangular plate as a whole,
It is composed of a lid member 32 which makes a pair with this. As shown in FIG. 3, the receiving member 31 is provided with a pair electric wire housing recess 33 extending along the longitudinal direction so as to be recessed except for the three side portions of the receiving member 31, and the outer side at the remaining one side portion. It opens towards. The bottom portion of the paired wire accommodating recess 33 has a shallow tubular curved shape and is deeper toward the center, but a flat surface 33a is provided on one side along the longitudinal direction. A double-sided tape 34 with release paper (not shown) is attached to the entire area of the paired wire accommodation recess 33 and the flat surface 33a, and the adhesive surface is exposed by removing the release paper.

Then, in the edge portion of the receiving member 31 which is continuous with the flat surface 33a, for example, a total of eight wire receiving grooves 3 are provided.
5 are formed at a predetermined interval, and the wire receiving groove 35 is formed.
Has a bottom portion connected to the upper surface of the double-sided tape 34 on the flat surface 33a. The wire housing groove 35 extends in a direction orthogonal to the extension direction of the pair wire housing recess 33,
In addition, the pressure contact terminals 13 in the terminal board 10 are arranged at intervals corresponding to the arrangement intervals. Also, the wire receiving groove 3
The cross-sectional shape of 5 is one insulated wire 23 as shown in FIG.
Has a partial circular cross section having a depth capable of accommodating more than half,
Therefore, the opening edge portion 35a is set to be narrower than the inside of the groove.

In addition, in order to show the insulated wire 23 to be housed in the housing groove 35 in the vicinity of the wire housing groove 35, as shown in FIG. As the identification mark 36, for example, “R, P, W, C,
Each alphabet of "BL, BR, Y" is stamped.

On the other hand, as shown in FIG. 5, the lid member 32 is formed with a paired wire housing recess 37 having the same shape as the paired wire housing recess 33 of the receiving member 31, and also corresponds to the wire housing groove 35. An electric wire housing groove 38 is formed. The electric wire housing groove 38 on the lid member 32 side is set to have a shallow depth so as to be continuous with the electric wire housing groove 33 on the receiving member 31 side to complete a circular cross section. Further, engaging recesses 39 are formed at two diagonal positions on the edge of the lid member 32, and the engaging projections 40 formed on the receiving member 31 are fitted therein to receive the receiving member 31 and the lid member 32. And will be integrated.

Next, a procedure for connecting the multi-core cable 20 having the above structure to the terminal board 10 will be described. First, before connecting the multi-core cable 20 to the terminal board 10, the electric wire holder 30 is previously attached to the tip thereof. The work is performed as follows. That is, the outer jacket 21 at the tip of the multicore cable 20 is peeled off to expose the twisted pair electric wire 22 of a required length. At this time, the twist of the twisted pair electric wire 22 should not be released. Next, the receiving member 31 of the electric wire holder 30 is taken out, and the release paper of the double-sided tape 34 is peeled off. Then, if the tip end portions of the twisted pair electric wires 22 are accommodated and pressed into the pair electric wire accommodating recesses 33 of the receiving member 31, these are affixed to the double-sided tape 34 and temporarily fixed. Then, the twist at the tip of each twisted pair electric wire 22 is unwound for a short length, and each insulated electric wire 23 is pushed into each electric wire accommodating groove 35. At this time, the twist of the twisted pair electric wire 22 is due to the pair electric wire accommodation recess 33.
Only the part which is held without being unwound inside and which passes through the wire housing groove 35 and projects from the receiving member 31 is in the untwisted state. Further, since the opening edge portion 35a of each electric wire accommodation groove 35 is set to be narrower than the inside of the groove, when the insulated electric wire 23 is press-fitted, as shown in FIG. It will be temporarily held. Therefore, even if it is necessary to push as many as eight insulated wires 23 into the wire receiving groove 35, the insulated wire 23 once pushed does not come off from the wire receiving groove 35.
You can easily finish the work.

Then, the receiving member 31 is covered with the lid member 32, and the engaging projection 40 of the receiving member 31 is inserted into the engaging recess 39 of the lid member 32 to integrate them (see FIGS. 9 and 10). ). As a result, it is
The two twisted pair electric wires 22 are accommodated, and the eight insulated electric wires 23 penetrate the electric wire accommodating grooves 35 and 38 and are laterally projected.

Therefore, the multicore cable 20 is connected to the terminal board 1
0 is connected to the work site, and the tip of the multicore cable 20 and the electric wire holder 30 are connected to the cable housing groove 15 of the terminal board 10.
And is placed along the press contact terminal row 14. And the insulated wire 23 protruding from the wire holder 30
When the insulated wires 23 are addressed to the pressure contact terminals 13, the insulated wires 23 are arranged side by side in line with the row intervals of the pressure contact terminals 13, so that the eight insulated wires 23 are all addressed to the pressure contact terminals 13. Becomes

The connection block 16 is connected to the pressure contact terminal 13
If pressed against the group, the pressure contact 17 of the connection block 16 pushes each insulated wire 23 into the pressure contact terminal 13, and the insulated wire 23 is pressure contact connected to the pressure contact terminal 13. At this time, the part of the insulated wire 23 which is on the side of the part pressed against the press contact terminal 13 is cut and removed.

As described above, according to the present embodiment, the twisted pair electric wires 22 are connected to the large number of pressure contact terminals 13 arranged in a line, but the twisted pair electric wires 22 are close to the pressure contact terminals 13 in pressure contact. Up to wire holder 3
The twisted state can be held at 0. As a result, the untwisted distance can be considerably shortened as compared with the conventional one, so that an effect that excellent crosstalk characteristics can be obtained can be obtained. Moreover, since the insulated electric wire groups 23 heading toward the pressure contact terminal 13 side are lined up at intervals equal to the row interval of the pressure contact terminal 13, the insulated electric wire groups 23 can be collectively addressed to the pressure contact terminal 13 group, It greatly improves the workability of pressure welding work and contributes to the reduction of construction time.

Further, in particular, in the above-described embodiment, the electric wire housing groove 35 of the electric wire holder 30 is set to have a shape in which the opening edge portion 35a is narrower than the inside of the groove. By housing 23 so as to be press-fitted, it is possible to temporarily hold the insulated wire 23 in the groove, which in turn facilitates the work for attaching the wire holder 30 to the multi-core cable 20, and further improves workability. can do.

Further, in the above-described embodiment, the wire holder 30 is provided with the identification mark 36 for identifying the insulated wire 23 to be housed, so that the insulated wire 23 is housed in the wire housing groove 35. In doing so, it can be accommodated in the predetermined electric wire accommodation groove 35 without making a mistake, and by extension, it is possible to prevent connection mistakes with the pressure contact terminal 13 and contribute to improving workability.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. Further, other than this, various modifications can be implemented within a range not departing from the gist. (1) In the above-described first embodiment, the lid member 32 of the electric wire holder 30 is configured as a separate component from the receiving member 31, but the configuration is not limited to this, and as shown in FIG.
1 may be integrally configured, and the engaging claws 42 may hold the both in a closed state. (2) Further, the lid member is not limited to a resin molded product, and for example, an adhesive tape is used as the lid member, the twisted pair electric wire is accommodated in the receiving member, and each insulated electric wire is accommodated in the electric wire accommodating groove. You may make it cover an adhesive tape in the state. (3) The identification mark provided on the electric wire holder 30 is not limited to the character mark such as the alphabet as in the above-described embodiment, but may be a structure in which a color mark corresponding to the color classification of the insulated wire is attached in the form of a label or the like. Good. (4) Further, the present invention is not limited to the terminal board for the telephone line as shown in the above embodiment, but can be applied to the connection structure to the terminal board of the network device such as a hub for configuring the LAN of the computer. Good.

[Brief description of drawings]

FIG. 1 is a perspective view of a terminal board showing a first embodiment of the present invention.

[FIG. 2] Similarly, an exploded perspective view of an electric wire holder

FIG. 3 is a plan view showing the receiving member of the electric wire holder.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a plan view showing the lid member of the wire holder.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged cross-sectional view of the electric wire receiving groove.

FIG. 8 is an enlarged cross-sectional view showing a state in which an insulated wire is also inserted into the wire housing groove

FIG. 9 is a perspective view showing a state in which an electric wire holder is also attached to the multicore cable.

10 is a sectional view taken along line XX of FIG.

FIG. 11 is a perspective view of an electric wire holder showing a second embodiment of the present invention.

FIG. 12 is a perspective view showing a connection form to a conventional terminal board.

FIG. 13 is a perspective view of the multicore cable in the same manner.

FIG. 14 is a perspective view showing a connection procedure of the multi-core cable in the same manner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Terminal board 13 ... Press-contact terminal 20 ... Multicore cable 21 ... Outer sheath 22 ... Twisted pair electric wire 23 ... Insulated electric wire 30 ... Electric wire holder 31 ... Receiving member 32 ... Lid member 33 ... Pair electric wire accommodating recess 35 ... Electric wire accommodating groove 36 … Identification signs

Claims (4)

[Claims] 1. A multi-core cable composed of twisted pair electric wires in which insulated electric wires are twisted to a plurality of press-contact terminals arranged in a row on a terminal board, wherein a twisted pair is provided at the tip of the multi-core cable. The electric wire is accommodated along the extension direction of the multi-core cable, and an electric wire holder made of an insulating material is attached to lead out each of the insulated electric wires in a side-by-side manner in accordance with the row interval of the pressure contact terminals. A method for connecting a multi-core cable to a terminal board, characterized in that the tip end of an insulated wire protruding from a holder is pressed against the pressure contact terminal. 2. An insulation attached to the tip of the multi-core cable when a multi-core cable made of a twisted pair electric wire in which insulated electric wires are twisted is pressure-welded to a plurality of pressure-contact terminals arranged in a row on a terminal board. An electric wire holder made of a material, wherein the twisted pair electric wires are accommodated in a twisted state along the direction of arrangement of the pressure contact terminals, and a pair electric wire accommodating recess is provided, and the pair of electric wire accommodating recesses are arranged in a row. A wire accommodating groove extending in a direction orthogonal to the direction and accommodating the insulated electric wires one by one at an interval matching the row interval of the pressure contact terminals; An electric wire holder for connecting a multi-core cable to a terminal board, the electric wire holder including a lid member mounted in a state of accommodating. 3. The electric wire holder according to claim 2, wherein the electric wire housing groove has a shape in which the opening edge portion is narrower than the inside of the groove. 4. The electric wire holder according to claim 2, wherein an identification mark for identifying the insulated electric wire to be accommodated is provided corresponding to each electric wire accommodating groove.