RU2231186C2 - Multipurpose tool for assembly of current conducting conductors of multipair electric communication cables with their connectors - Google Patents

Abstract

FIELD: maintenance of telephone communication lines.

SUBSTANCE: invention deals with assembly of multipair electric cables by way of simultaneous crimping of aggregate of insulated current conducting conductors of multipair communication cables with the help of reducing ( cut-in ) contacts. Tool comprises pressing mechanism including pressure element interacting with connector, transfer mechanism to set pressing mechanism in action and hand lever for action of transfer mechanism, holding framework to house connector that is joined to press mechanism. Holding framework is provided with set of auxiliary devices comprising interchangeable guiding combs and separable universal adapter which are meant to set one or several connectors with total capacitance of 25 pairs in holding frame. Adapter presents guiding plate with fixing elements used to anchor it in holding framework along which teeth are arranged. Number of teeth is determined by quantity and number of mated pairs. Tool comprises assembly fixture in the form of split assembly frame comprising two adjacent strips, central attachment unit and L-shaped bed ensuring vertical and horizontal movement of holding framework in process of assembly. Press mechanism has hydraulic principle of action, and punch returns to initial position by opening of valve coupled to drain valve.

EFFECT: versatility of tool, operational convenience and economic efficiency.

6 cl, 19 dwg, 1 tbl

Description

The invention relates to the field of servicing telephone lines, and more particularly, to devices for mounting multi-pair electrical cables by crimping multiple insulated conductive wires of multi-pair cables of a local telephone network in multi-pair electrical connectors with crimp (mortise) contacts.

The multi-pair electrical connectors used for the installation of conductive cable cores of urban telephone networks are widely used for splicing adjacent construction lengths of communication cables. The widespread use of digital transmission and switching systems on local telephone networks in recent years makes it necessary to use multi-pair electrical connectors, which have an advantage over other types of connectors. Such connectors, having mortise-type U-shaped contacts, allow the connection of conductive conductors of multi-pair cables without stripping the insulation, and a small passage resistance of the connection point is formed, which is necessary for high-quality information transfer.

Such connectors are known from the prior art and are described, for example, in the following literature: Komarov OM etc. Installation of multi-pair cables with connectors. - M .: Communication, 1979. - 56p., Ill .; as well as the Guide to the construction of linear structures of local communication networks. The Ministry of Communications of Russia - AOOT “SSKTB - TOMASS”, - M., 1995, h-I, h-II.

Connectors can be individual and multi-pair. When installing multi-pair cables, multi-pair connectors with U-shaped mortise contacts are most effective. The multi-pair connector holder housing may have a number of U-shaped contacts. Traditionally, in the practice of installing insulated conductive conductors of multi-pair cables, connectors for 10 and 25 pairs of conductors are most often used. However, since communication cables can have different capacities or the number of pairs, the connectors must also have the appropriate pairing. As a rule, the installation of conductors in such connectors on the line is carried out by an autonomous manual and, therefore, expensive tool.

From the world practice of installing multi-pair communication cables, several methods and devices for their implementation are known that are used when splicing conductive wires without stripping insulation.

For example, the application for the invention of the Russian Federation “EASY HAND TOOLS” No. 95122821/09, 10.10.95, IPC 6 H 01 R 43/042, (PST / US 94/03268, 03.24.94), Minnesota Mining and Manufecuring Company (US) , published BI No. 30, 1998, and RF patent No. 2101813 of the same firm “Solderless electrical connector, IPC 6 H 01 R 4/24, published BI No. 1.1998.

The crimping operation of the connectors with the conductors inserted into the contacts can be carried out with a tool resembling a press mechanism, as provided for in RF patent No. 2123222, IPC 6 Н 01 R 43/042, Minnesota applicant Mining Manufecuring Company (US) “TOOL FOR SIMULTANEOUS COMPRESSION OF MULTIPLE INSULATED WIRES IN ELECTRICAL CONNECTOR WITH CLIPPING CONTACTS ”, which is the closest analogue of the claimed tool and is selected as a prototype. As well as RF patent No. 2123221 “DOCKING HEAD FOR TELECOMMUNICATION INSULATED WIRES” of the same applicant, both patents are published by BI No. 34, 1998. Crimping of insulated conductors in the electrical connector is carried out using a tool containing a tool for detachable fastening to the docking head with a receiving plate for placement of the electrical connector, a pressure member for interacting with the electrical connector located in the docking head, and a manually-operated lever mounted on an axis for the action of the transmission mechanism in order to move the pressure element with a given step to crimp the electrical connector in the docking head. The fastening means includes means for engaging with the docking head, which makes it possible to install the pressure member at predetermined distances from the receiving plate, and the transmission mechanism includes means for further adjusting the distance between the pressure member and the receiving plate.

In the described device, the pressure is generated and transmitted mechanically.

However, a mechanical drive requires the application of significant physical effort and does not allow to achieve a uniform load distribution of the pressing force.

Another significant drawback of the prototype is the fact that the tool allows you to work with only one connector of the same type. If you need to service another cable and / or connector of a different pair, you need to use another tool.

The present invention aims to solve the above, as well as some other problems, such as the use of several connectors at the same time, and to create a universal, economical tool that will allow you to press the insulated wires into the connectors of different heights and capacitances of U-shaped contacts.

First of all, in the patented tool, as well as in other similar devices, there is a press mechanism, however, the pressing element of this press mechanism uses not a mechanical, but a hydraulic principle of operation. Hydraulics can reduce the pressure required to actuate the press mechanism, and also provides stability of the pressure. In addition, hydraulics eliminates the additional adjustment of the distance between the pressure element and the receiving plate, which also increases the versatility of the tool.

The holding frame (in the prototype, the docking head) is connected to a hydraulic press mechanism and is used to install an electrical connector, one or more, depending on the type and paired cable, and has a set of auxiliary devices.

Auxiliary devices installed in the holding frame make it possible to use one electrical connector or several electrical connectors simultaneously with a total capacity of up to 25 pairs inclusive, i.e. serve to increase the versatility of the tool. These auxiliary devices are:

- removable interchangeable guide combs, the number of teeth of which corresponds to the connectors used, serve to fix the direction of the conductive wires of the cable to the electrical connector, are used in any case;

- the removable universal adapter is a guide plate with the elements of its fastening and fixing in the holding frame along which the teeth are located (the number of teeth is determined by the pair of connectors). The adapter also serves to fix the direction of the conductive cable conductors in the electrical connector and at the same time is the basis for installing two or more connectors simultaneously in the holding frame.

The interchange of the adapter and the guide combs of the kit allows you to quickly re-equip the proposed tool directly at the place of work on the installation of a multi-pair cable with one or more connectors simultaneously with a total capacity of up to 25 pairs inclusive.

For ease of use, the tool kit includes a collapsible mounting frame, which consists of two adjacent symmetrical strips, a central mounting unit and an L-shaped bed, and serves to fix mounted cables on it and to fasten the retaining frame at the time of crimping the cable cores.

Summarizing the above distinguishing features of the proposed invention, it can be stated that the tasks are solved as follows.

A universal tool for mounting conductive conductors of multi-pair electrical communication cables with connectors consists of a press mechanism, including a pressure element for interacting with the connector, a transmission mechanism for actuating the pressure element and a hand lever for operating the transmission mechanism, and a holding frame for accommodating the connectors to be connected to press mechanism. The tool is characterized in that the holding frame is equipped with a set of auxiliary devices, consisting of interchangeable guide combs and a removable universal adapter, which are used to install one or more connectors with a total capacity of up to 25 pairs, inclusive, in the holding frame.

At the same time, the removable universal adapter is a guide plate with the elements of its fastening and fixing in the holding frame along which the teeth are located, the number of teeth is determined by the number and pair of connectors.

The tool includes a mounting device for fixing mounted cables on it, made in the form of a collapsible mounting frame, consisting of two adjacent symmetrical strips with spherical recesses, a central mounting unit and a L-shaped frame for attaching the tool holding frame. In this case, the L-shaped frame of the collapsible mounting frame provides vertical and horizontal movement of the holding frame during the installation of conductive cable conductors.

The tool is also characterized in that the press mechanism has a hydraulic principle of operation, and the punch is returned to its original position by opening the valve associated with the drain valve.

In the future, it is advisable to build the actual description of the tool’s operation using the examples of 10 and 25 pair connectors, the most common in communication technology today.

The following drawings are attached to the description.

Figure 1 shows the press mechanism of a universal tool with a partially removed housing;

figure 2 - General view of the tool (top view);

figure 3 is a General view of the tool (side view);

figure 4 shows a removable guide comb, consisting of 10 teeth, used in the installation of 10-pair connectors;

figure 5 is a removable guide comb, consisting of 11 teeth, used in the installation of 10-pair connectors;

figure 6 shows a removable adapter, fixing the placement of two 10 pair of connectors;

Fig.7 - actually holding the frame, prepared for mounting the cable using a 25-pair connector;

on Fig - a tool prepared for mounting the cable using 10-pair connectors;

figure 9 shows a removable guide comb, consisting of 25 teeth, used during installation of 10-pair connectors;

figure 10 is a removable guide comb, consisting of 26 teeth, used during installation of 11-pair connectors;

11 shows a tool prepared for mounting a cable using a 25-pair connector;

on Fig presents one of two symmetrical strips, which is part of a collapsible mounting frame;

on Fig shows the attachment point of two adjacent slats and the L-shaped frame.

on Fig shows the L-shaped frame, designed for fastening the holding frame;

on Fig presents a fully universal tool prepared for use;

on Fig and 19 presents a holding frame, removable combs and a universal adapter for mounting cables using 10-pair connectors;

on Fig and 18 presents a holding frame and removable combs for installation using a 25-pair connector.

The press mechanism of a universal tool has the following main technical characteristics.

The product is made in a climatic modification of VXII category of placement 1 in accordance with GOST 15150-69.

The table shows some of the operating parameters and characteristics of the tool.

The device and the principle of operation of the press mechanism will consider using figure 1.

The press mechanism consists of a bracket 1 and a pump module 2, which is a power unit, which includes a pump with a reservoir and a hydraulic cylinder. A piston 3 and a valve mechanism are located in the housing of the pump module. The Poisson 6 is connected to the piston rod using a pin 7. The bracket 1 rotates freely relative to the housing of the pump module.

Seals used in the press mechanism.

Protective ring 13 (M 204 01 004).

Protective ring 14 (M 204 01 004-01).

Protective ring 15 (НМ 010 00 002-02).

Ring 16 according to GOST 9833-73 / GOST 18829-73 (016-020-25-2-3).

Ring 17 according to GOST 9833-73 / GOST 18829-73 (020-024-25-2-3).

Ring 18 according to GOST 9833-73 / GOST 18829-73 (003-006-19-2-3).

Ring 19 according to GOST 9833-73 / GOST 18829-73 (006-009-19-2-3).

Ring 20 according to GOST 9833-73 / GOST 18829-73 (052-056-25-2-3).

The crimping of the connectors occurs due to the force arising when the oil is injected into the cavity under the piston when the lever 5 is swinging.

The return of the punch to its original position is carried out by opening the drain valve 9.

In General, the hydraulic device of the press mechanism as such is not the subject of this invention, because it is known from the prior art and meets the requirements of regulatory documents GOST 12,2,086; GOST 12,2,040. Certificate number ROSS RU. AY04. B02889. Certified by the certification body for engineering products "POMMASH" ROSS RU.0001. 11AY04. Manufacturers: CJSC Enerpred, Russia (Irkutsk) and LLC Yugsvyazdetal, Russia (Krasnodar). The subject of the present invention is the fact that the hydraulic principle of operation is applied in the press mechanism of a hand tool for mounting communication cables on lines in order to obtain a large positive effect, namely: reducing the required pressing force required to actuate the press mechanism; ensuring the stability of the pressing force, while the tool as a whole, without losing quality indicators, becomes easier and more compact in comparison with the known analogues.

The removable guide comb 21 shown in FIG. 4, consisting of a series of two groups of ten units of plastic teeth, respectively, together with another removable guide comb 22, shown in FIG. 5, also consisting of a series of two groups, respectively, but already eleven plastic units teeth attached to the holding frame 23, Fig.6. Combined combs 21 and 22 serve as guides for laying pairs of conductive conductors of a communication cable when mounted on 10-pair connectors. The placement of the guide combs 21 and 22 together with the retaining frame 23 in the cavity of the tool holder 1 is shown in Fig. 7 (the retaining frame 23 is not indicated in Fig. 7).

Figure 6 shows a removable adapter 24 when used when installing 10-pair connectors. The adapter is a guide plate and has a series of guide teeth 25 located along the edge of the plate with a step corresponding to the pitch of the teeth of the guide combs. 10-pair connectors are located in the adapter space 26 and are fixed by the protrusions of the movable terminals 28 and 32. The movable terminal 28, having the protrusions 29, has a vertical free movement when crimping the connectors and returns to its original state using two springs 30. FIG. 8 shows the location of the adapter 24 based on the holding frame 23. The adapter 24 is attached to the holding frame 23 by the protrusions-grippers 31 and the protrusions of the movable terminals 32 of the holding frame included in the grooves 27 of the adapter. The fastening of the holding frame 23 to the bracket of the press mechanism 1 occurs by gripping the groove 34 of the bracket 1 with the protrusions 33 of the holding frame 23. The fixing of the holding frame 23 in the bracket 1 is carried out by a spring clip 35.

The process of pressing 10-pair connectors is as follows.

The removable guide combs 21 and 22 are mounted on the holding frame 23. An adapter 24 is mounted on the base of the holding frame 23 and fixed by the terminals 27 and 31. In the space 26 of the adapter 24, 10-pair connectors are laid and fixed by the terminals 27 and 29. Assembled and thus prepared for The mounting support frame is mounted on a special machine. Conductors of the cable core prepared for installation are passed through the tool elements, for which purpose the base of the connector housing is laid on the base of the adapter 24. Pairs of conductive wires of one of the mounted cables are passed through the teeth of the guide combs 21 and 22, and then through the slots 25 of the adapter 24 and laid on the U-shaped contacts of the connectors. At the output of the holding frame 23, the conductive conductors of the cable are fixed by a spring. The body of the connector is laid on the base of the connector and the installation process is repeated, but for ten pairs of another, adjacent cable. As two 10-pair connectors are filled, they begin crimping them. The housing 1 of the press mechanism is mounted on the holding frame 23 and fixed with spring clips 35. Lever 5 by pumping oil into the hydraulic cylinder creates a force transmitted to the punch 36. After two or three idle strokes of the lever 5, the punch 36 reaches the surface of the connector cover and begins to act on it. When the moment of force 2000 kgf is reached, the lever 5 stops the free play and stops. The punch returns to its original state after opening the drain valve 9. The press mechanism is removed from the retaining frame 23, and the connectors are laid in the joints of the coupling.

If you need to install and crimp 25-pair connectors, the following operations are performed.

The guide combs 21 and 22 are removed from the holding frame 23 and the adapter 24 is removed.

The guide combs 37 and 38 are attached to the holding frame. A 25-pair connector 39 is laid at the base of the frame.

The process of mounting conductive cable cores in the elements of the comb, holding the frame and connector, as well as crimping the latter is similar to that described above when working with a 10-pair connector.

In General, the location of the guide combs of the holding frame and 25-pair connector in the cavity of the bracket 1 of the press mechanism is shown in Fig.11.

Prior to the commencement of work on the actual pressing of the conductive cable conductors in the connectors, work is carried out to prepare a collapsible mounting frame for work, installing a holding frame on it, securing a multi-pair connector (s) on it, and laying conductive conductors. Presented on Fig one of two adjacent symmetrical strips 40 (in projections) can be made of metal (for example, steel 1.5 mm). On the outer surface, the bar 40 has a spherical recess 41 with a radius of 140 mm, two holes 42 for fastening to the bolts 43 of the central node of the mounting frame 44 (see Fig. 13). Multiple cables to be mounted are laid in the spherical recess 41 of the left and right straps 40 and are secured with a retaining strap around the cable with tension along the length of the strap. On the one hand, the holding belt is fastened with a ring for a special protrusion 45 on the strap 40, on the other hand, with a self-retaining Velcro tape. The central mount 44 is also made of metal (for example, 1.5 mm steel) and has the form of a triangle to which, in addition to the left and right planks 40, the L-shaped frame 47 is attached using guide bolts 46. The L-shaped frame is made of metal ( for example, steel 2.0 mm), has two sides located at right angles to each other. The larger side has three longitudinal cutouts 48 for the guide and holding bolts 46 of the strap 40 (Fig. 14). The upper part of the frame 47 has four longitudinal cutouts 49, in which a holding frame 23 is fastened, which has four special fixing bolts for this purpose in its lower part. The advantages of the L-shaped bed should include its structural simplicity. The slots 48 and 49 of the bed allow vertical-horizontal movement of the holding frame 23, thereby optimizing the installation process of the conductive cable conductors.

The main advantage of the proposed universal tool is the ability to crimp both multi-pair connectors of different capacities, in particular 10- and 25-pair ones, and a different number of connectors simultaneously installed in the holding frame, which makes the device convenient to use, as well as technically and cost-effective in operating conditions on communication lines.

Claims (6)

1. A universal tool for mounting conductive conductors of multi-pair electrical communication cables with connectors, consisting of a press mechanism including a pressure element for interacting with the connector, a transmission mechanism for actuating the pressure element and a manual lever for acting on the transmission mechanism holding the frame to accommodate the connectors connected to the press mechanism, and mounting device for fixing the mounted cables, characterized in that the holding frame is provided with a set of auxiliary devices, consisting of interchangeable guide combs and a removable universal adapter, used to install one or more connectors of different capacities, the mounting fixture is made in the form of a folding mounting frame consisting of two adjacent symmetrical strips, a central mounting unit and a L-shaped frame for mounting holding frame, and the press mechanism has a hydraulic operating principle. 2. The universal tool according to claim 1, characterized in that the total capacity of one or more connectors installed in the holding frame is up to 25 pairs inclusive. 3. A universal tool according to any one of claims 1 and 2, characterized in that the removable universal adapter is a guide plate with fastening and fixing elements in the holding frame along which the teeth are located, the number of teeth is determined by the number and pair of connectors. 4. A universal tool according to any one of claims 1 to 3, characterized in that in the hydraulic press mechanism, the punch is returned to its original position by opening a special valve associated with the drain valve. 5. A universal tool according to any one of claims 1 to 4, characterized in that the cables to be mounted are placed in spherical recesses on both planks of a collapsible mounting frame and secured with a special holding strap that wraps the cable along the length of the plank. 6. A universal tool according to any one of claims 1 to 5, characterized in that the L-shaped bed of a collapsible mounting frame provides vertical and horizontal movement of the holding frame during installation of conductive cable conductors.

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