JP2987280B2 - Communication cable core pair connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device or a tool for connecting a core of a pair of communication cables, and relates to a connection operation of a core of a communication cable in a narrow space such as a manhole. The operation of connecting the connector terminal and the core of the communication cable and the operation of cutting off the extra-length cable after the connection can be performed simultaneously, which simplifies the work of connecting the core of the communication cable in a narrow space such as a manhole. And efficiency can be improved.

[0002]

2. Description of the Related Art Various types of connectors are known for connecting core wires of a pair of communication cables, and connection devices for the respective connectors are known. As an example of this, there is known a connector in which a communication cable end is sandwiched between a metal sleeve and a tapered pin having a tooth-like projection (Japanese Patent Publication No. 51-19575). Various devices and tools for the connection work of the above (i.e., a pair of devices for connecting the cores of communication cables) are also known (JP-B-51-19576 and JP-B-52-4029). The mechanism of each of these known communication cable core pair connection devices is not always simple, and the connection operation between the connector terminal and the communication cable core wire and the cutting operation of the extra-length cable after connection are performed in two steps. Since the connection and disconnection operations are performed by operation, it is desirable that the connection and disconnection operations be completed by a single manual operation in order to further simplify and streamline the connection operation.

[0003]

SUMMARY OF THE INVENTION In order to meet the above-mentioned demands, the present invention provides a connector structure and a connection method for completing the connection and disconnection operations by one manual operation. An object of the present invention is to devise the mechanism and structure of the device.

[0004]

[Measures taken to solve the problem]

(1) A compression spring is interposed between a slide block and a flange of a block push rod pushed out by an operation lever. (2) A cutter having a pair of upper and lower blades that can protrude from the tip of the slide block is provided on the slide block. (3) The front end of the block push rod is brought into contact with the rear end of the cutter, and (4) The connector holding plate for sandwiching and positioning the connector between the block and the main body block. That the connector retainer has.

[0005]

[Operation] A connector to which a pair of cables is temporarily mounted is positioned and held between the main body block and the connector retainer, and then the operation lever is operated to push out the block push rod. In the initial stage of the forward movement of the block push rod, the slide block moves forward together with the cutter, and the slide block contacts the connector holding plate. Thereafter, the spring is compressed by the block push bar through the flange, and the compression of the spring pushes the cutter only the cutter, so that the cutting edge protrudes from the slide block. The protruding cutting edge of the cutter penetrates into the connector. Subsequently, the block push rod is pushed out and moves forward, and its flange abuts on the step of the two-step hole of the slide block. From this point, the entire slide block moves forward with the blade edge of the cutter protruding. As the slide block advances, the cable holder is pushed into the casing of the connector, and the cable holder is fixed to the casing. At the same time, the core of the cable is connected to the connection metal plate of the connector, and at the same time, the cutter that has entered the inside of the connector. With the cutting edge, the extra length of the cable connected to the connection metal plate is cut at a predetermined point, and the slide block stops. Therefore, the connection of the core wire of the cable with the connection metal plate of the connector and the cutting of the extra length of the cable can be simultaneously completed by one operation of the operation lever. Therefore, the operator positions and mounts the connector on which the pair of cables are temporarily mounted to the connection device, and thereafter can operate the operation lever once to complete the operation of mounting the connector on the pair of cables.

[0006]

[Embodiment] Although the present invention is an improvement of the prior art, it is not a partial improvement of the existing invention, but features a novel mechanism and structure as a whole. An example of the connection device of the present invention will be described with reference to the drawings. The connector connected to the cable by the connection device of the present invention has a pair of connection metal plates 51 with a U-slit u, and pushes the pair of cables held by the cable holder 52 into the U-slit u of the connection metal plate 51. Thus, the core of the cable C is brought into contact with the inner surface of the U slit u. That is, the width d of the U slit u is slightly smaller than the diameter of the core wire of the cable C, and
When the cable C is pushed into the U slit u, the coating of the cable C is cut by the inner surface of the U slit u, and the inner surface protrudes inside the coating of the cable C and contacts the outer surface of the core wire of the cable C. It is. This connector has a pair of connecting metal plates 51 at the bottom of a square casing 53 made of synthetic resin, and a pair of upper and lower claws 54 projecting from the left and right inner surfaces of the casing 53 respectively. The cable holder 52 is a plate made of a synthetic resin having a square planar shape, has a substantially H-shaped cross-sectional shape, and holds the cables C, C in contact with the neck portion 55. The lower portion 56 of the cable holder 52 is provided with a pair of left and right notches 57, 57 at the center thereof so as not to interfere with the connection metal plates 51, 51 when fitted to the casing 53. With the pair of cables C held in the neck portion 55, the cable holder 52 is connected to the connector casing 53.
When the cable holder 52 is pushed in, the claw 54 is broken, and the side surface of the cable holder 52 is strongly pressed against the broken surface, and the cable holder is fixed in a state fitted to the casing 53 by this pressing force. Thereby, the core wires of the pair of cables C are connected to the connection metal plate 51 of the connector. The above is the outline of the mechanism and structure of the communication cable connector connected by the communication cable pair connection device of the present invention. Next, a connection device of the present invention for connecting the communication cable connector to a pair of communication cables and cutting the end of the cable will be described in detail. A pair of operation levers 1 are pivotally connected to the right end of the main body 6 of the connection device by pins 2, and links 4, 4 connected to the operation levers 1, 1 by pins 3 are connected to each other by pins 5. A block push rod 7 slidable left and right with respect to a main body 6 is connected to a pin 5 connecting the links 4 and 4 to each other. The operating levers 1 and 1 are urged by a spring 8 in the opening direction. A body block 9 having a substantially U-shaped cross section is fixed to the body 6 with screws or the like. An L-shaped connector retainer 10 is slidably held on the body block 9 to the left and right.
It is biased left by one. This connector presser 1
Numeral 0 has a knob 12 on its lower surface and is operated to the right against the spring 11. Further, a two-stage hole is provided in the right half of the slide block 13 slidably held in the main body block 9 to the left and right, and a step portion 16 is provided between the small-diameter portion 14 and the large-diameter portion 15. Spring (compression spring) on small diameter section 14
17 is fitted, and the large diameter portion 15 is fitted with the flange 18 of the block push rod 7. A cutter holding hole 19 is provided in the left half of the slide block 13, and a cutter 20 for cutting the core wire and a backing plate 22 are slidably fitted in the cutter holding hole 19 to the left and right. The tip of 20 is a pair of upper and lower small cutting edges 21 and 21. A support shelf 24 for supporting the connector 100 protrudes from the inner surface of the left end wall 23 of the main body block 9, and a pair of upper and lower connector positioning pins 25, 25 is provided on the left end wall 23.
Is protruded inward. Hold the knob 12 to retract the connector presser 10 to the right against the spring 11,
The connector 100 in a state where the cable holder 52 to which the pair of cables C is mounted is lightly fitted to the connector casing 53 is placed on the support shelf 24 of the left end wall 23 of the main body block. Thereafter, the connector retainer 10 is released, and a part of the connector 100 (a part that does not hinder the advancement of the cutter 20) is lightly grasped by the retainer plate 10a at the tip and the left end (front end) wall 23 of the main body block. At this time, the connector positioning pins 25, 25 are engaged with positioning holes (not shown) on the outer surface of the connector 100 to accurately position the connector 100 at a predetermined position. In this state, when the operating levers 1 and 1 are strongly grasped and approach each other, the link pushers 4 push the block push rod 7. Since the resistance to the slide block 13 is zero at the beginning of this operation, the slide block is lightly pushed out by the block push rod 7 through the spring (compression spring) 17 and the flange 18 so that the slide block 13 and the cutter 20 become one. After moving in various ways, the slide block 13 comes into contact with the connector holding plate 10a. Thereafter, the spring 17 is compressed by the block push rod 7 via the flange 18,
The compression of the spring 17 causes the block push rod 7 to move the contact plate 2
2, only the cutter 20 is pushed out, and its cutting edge 21 protrudes from the slide block 13. The protruding cutting edge 21 of the cutter 20 enters the inside of the connector from a cutter insertion hole (not shown) provided on a side surface of the connector 100. Subsequently, the block push rod 7 is pushed out and moves forward, and its flange 18 comes into contact with the step 16 of the two-step hole of the slide block 13. From this point, the entire slide block 13 moves forward with the cutting edge 21 of the cutter 20 protruding. As the slide block 13 advances, the cable holder 52 is strongly pushed into the casing of the connector 100, the cable holder 52 is fixed to the casing 53 of the connector, and the core of the cable C is connected to the connecting metal plate 51 of the connector. The extra length of the cable C connected to the connection metal plate 51 is cut at a predetermined point by the cutting edge 21 of the cutter 20 which has been connected and at the same time entered the inside of the connector, and the slide block 13 stops moving forward.
The connector 10
Numeral 0 is accurately positioned with respect to the main body block by a pair of upper and lower positioning pins 25,25. When the operating levers 1 and 1 are opened by the spring 8, the block push rod 7
Retreats and returns to the state shown in the figure. At this time, the pushing force on the slide block 13 and the cutter 20 becomes zero,
Since the connector holding plate 10a of the connector holding member 10 is lightly pressed by the small spring 11, the connector holding plate 1
The connector 100 is slightly pressed and held by Oa. Therefore, when the operation lever is released, the connector 100 does not drop unexpectedly. After holding the knob 12 and retracting the connector retainer 10 against the spring 11, the connector 100 can be removed from the connection device. As described above, with the connection device of the present invention, the operation of connecting the connector and the cable having the above structure and the operation of cutting the excess length of the cable can be completed by one operation of the operation levers 1 and 1. In addition, the connector after connection does not accidentally fall from the connection device and be lost in a dark work space such as a manhole. One of the operation levers 1 and 1 may be fixed to the main body 6 and only the other one may be movable. In addition, as a structure for advancing the block push rod 7 by the operation lever, a cam is used instead of the link 4. May be used. Further, the spring 17 transmits a force of a certain level or more to the slide block, and has a function of allowing the block push rod 7 to move forward with respect to the slide block when the force is applied to the slide block. , A disc spring, or a rubber block may be used. Further, in the above embodiment, the connector retainer 10 is a slidable member urged leftward, that is, forward by the spring 11, which elastically grips the connector between itself and the main body block, and The connector retainer 10 itself can be attached to the main body block 9 as long as it can be easily attached and detached.
And the connector holding plate 10a may be a spring plate, the connector may be elastically gripped by its elastic deformation, and the connector may be mounted and removed using the elastic deformation. In practice, it is easier to mount and remove the connector if the holding plate 10a can move forward and backward with respect to the left end wall 23 of the main body block, that is, the counterpart, so that the connector holder can be slid back and forth as described above. Better to be free.

[0007]

The above object of the present invention can be achieved by using a very simple connecting device to connect a core of a pair of cables to a connecting metal plate of a connector, and to cut an extra length of a pair of cables. Can be completed by a single operation of the lever, whereby the work of connecting the connector to the cable can be facilitated, and the work efficiency and efficiency can be improved. Further, since the block for pushing and cutting is a sliding block that performs a sliding motion, the entire cable holder of the connector can be pushed into the casing of the connector with a uniform force. Poor connection between the wire and the connecting metal plate can be reduced as much as possible.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment of FIG.

FIG. 3 is a sectional view taken along line AA of the embodiment of FIG. 1;

FIG. 4 is a side sectional view of an example of a connector.

FIG. 5 is a plan view of the connector of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Operation lever 2, 3, 5 ... Pin 4 ... Link 6 ... Body 7 ... Block push rod 8, 11 ... Spring 9 ... Body block 10 ... Connector Presser 10a ・ ・ ・ Presser plate 12 ・ ・ ・ Knob 13 ・ ・ ・ Slide block 14 ・ ・ ・ Small diameter part 15 ・ ・ ・ Large diameter part 16 ・ ・ ・ Step 17 ・ ・ ・ Strong spring 18 ・ ・ ・ Flange 19 ・..Cutter holding hole 20 ... Cutter 21 ... Cutting edge 22 ... Plate plate 23 ... Left end wall 24 ... Support shelf 25 ... Connector positioning pin 51 ... Connection metal plate 52 ... -Cable holder 53 ... Casing 54 ... Claw 55 ... Neck part 56 ... Lower part of the cable holder 57 ... Notch 100 ... Connector u ... U slit C ... Cable d ... Width of U slit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumi Iijima 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Co., Ltd. (72) Inventor Masahiro Suzuki 1-5-1 Kiba, Koto-ku, Tokyo No. Fujikura Co., Ltd. (72) Inventor Takami Sakaguchi 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Yasuhiko Tanabe 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo No. 6 Inside Nippon Telegraph and Telephone Corporation (72) Inventor Masanori Suesawa 3-8-8 Minamihashimoto, Sagamihara City, Kanagawa Prefecture Within Sumitomo 3M Corporation (72) Inventor Chiho Oike 3-8 Minamihashimoto, Sagamihara City, Kanagawa Prefecture No. 8 Sumitomo 3M Limited (56) References JP-A 5-31185 (JP, U) JP-A 6-113090 (JP, U) JP-A 6-62493 ( P, U) JitsuHiraku flat 6-62494 (JP, U) (58 ) investigated the field (Int.Cl. ^6, DB name) H01R 4/24 H01R 43/01 JICST file (JOIS) WPI / L (QUESTEL ) Practical file (PATOLIS) Patent file (PATOLIS)

Claims (3)

(57) [Claims] A compression spring is interposed between a slide block and a flange of a block push rod pushed out by an operation lever, and a cutter having a pair of upper and lower blades protruding from the tip of the slide block is slidable on the slide block. A pair of communication cable cores provided with a connector retainer having a connector retainer plate for holding the connector between the block and the body block by holding the distal end of the block push rod against the rear end of the cutter. Connection device. 2. The communication cable pair connection device according to claim 1, wherein the connector retainer is manually operable in the front-rear direction and is urged forward by a spring. 3. The communication cable core pair connection device according to claim 1, wherein the operation lever and the block presser bar are connected by a link.