JP2564921Y2 - Crimp connection tool for one-core cable connector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand tool for crimping an electric wire to a connector for connecting an electric wire, and more particularly, to a crimping and extra length of a one-core wire connecting connector for connecting a pair of telephone line cables. The present invention relates to a crimping connection tool capable of continuously performing core wire cutting with one handle grasping operation.

[0002]

2. Description of the Related Art Conventionally, as a connector for connecting a telephone line cable, a connector having various logarithms (number of contacts) is used to connect a required number of lines.
There is also known a connector in which male and female connectors having the same structure can be fitted. Generally, such a connector having the same structure is provided with one of a pair of contacts for positive and negative currents for connecting one line as a male contact and the other as a female contact, and connectors having the same structure are fitted to each other. In such a case, both male contacts and female contacts are connected to form a contact pair of one line.

In this type of telephone line connector, when a wire core of a telephone line cable is connected to the connector, a U-shaped contact formed on the upper part of each of the male and female contacts installed inside the connector body. Each of the pair of cores is placed on the blade, and the core is pressed onto each contact by pressing the cover from above, and at the same time, the cover is attached to the main body. At this time, each wire core is cut to a desired length before being crimped to each contact, and a method is adopted so as not to leave an extra long core wire after crimping.
Also known is a connector in which a cutter blade is provided inside the body of the connector to cut the extra length of the wire core, and the extra length core wire is automatically cut and removed simultaneously with the crimping of the core wire. It is. Alternatively, in the cover attached to the connector body while pressing the core wire, a plurality of holes through which a cutter blade for cutting the wire core wire passes are formed, and the excess length is cut after or simultaneously with the crimping of the core wire. Some have a structure that can be removed.

As described above, when a wire core wire whose excess length is cut in advance is used, or when a connector with a built-in cutter blade is used, the wire core wire is moved in the mutual direction by operating the handle when crimping the wire core connection. The use of simple crimping pliers with a pair of opposed jaws is possible.
Further, for those in which a plurality of holes through which the cutter blade passes are formed in the connector cover, after crimping the core wire with the above-mentioned crimping pliers, the extra long core wire is cut using another cutter, or For example, a crimping device having a plurality of cutter blades as disclosed in Japanese Patent Application Laid-Open No. 63-207075 is used.

[0005]

The crimping device having a plurality of cutter blades can crimp and cut the wire core with one device, but the target connector is a multi-line connector for multi-line connection. Since the connector is a twin-core connector, the size of the device is inevitably increased, and the structure is complicated. Further, since a large compressive force is required for crimping the core wire of the multi-fiber core connector, the device is required to have high rigidity, and the device must be firmly fixed to the support during operation. Therefore, for a one-core connector for one-line connection,
This device cannot be used. The one-core cable connector is often attached to a desired line of the telephone line cable already installed at the work place. In such a case, it is necessary to use hand tools such as crimping pliers. It is convenient. Therefore, as described above, the extra length of the wire core is cut in advance, or a one-core wire connector with a built-in cutter blade is used, but cutting the wire in advance makes the operation complicated. In addition, it requires a separate cutting tool, which is inappropriate in the current situation where quick crimping and cutting work is required. Incorporating a cutter blade in the connector hinders miniaturization of the connector. is there.

The present invention has been made in view of these problems, and has as its object to quickly perform crimping of a core wire to a one-core connector and cutting of the extra-long core wire with one hand tool. It is an object of the present invention to provide a crimping connection tool for a one-core cable connector.

[0007]

In order to achieve the above object, the present invention provides a crimping connection tool for a one-core cable connector, which includes a fixed upper jaw and a fixed upper jaw, which are fixed to each other. It has a pair of cutter blades extending downward in parallel and a flat pressing surface that abuts against and presses the connector cover, and conceals each of the cutter blades and abuts the connector cover below the upper jaw. A crimping plate arranged to be vertically movable between a possible lower crimping position and an upper retracted position exposing each of the cutter blades, and a first spring for urging the crimping plate to the lower crimping position Means, and a movable lower jaw having a mounting surface for mounting the connector body substantially parallel to the pressing surface of the crimp plate, and being vertically movable with a predetermined interval below the upper jaw. A second spring means for biasing the lower jaw upward with a spring force smaller than that of the first spring means, and the upper jaw being fixedly arranged at the upper end via a fixed column. a support handle for supporting the lower jaw to be moved vertically while being maintained in parallel to the said upper jaw, while being rotatably journaled in the support handle, in its own rotation An operating handle for pressing and moving the lower jaw in the direction of the upper jaw in conjunction therewith, and a single handle grasping operation while holding a one-core connector between the crimping plate and the lower jaw. Thus, crimping and cutting of the core wire can be performed continuously.

According to a preferred embodiment of the present invention, a through hole is provided in the fixed column for fixedly arranging the upper jaw, and a pair of cores in which the mounting surface of the lower jaw is disposed in front of the through hole. A crimp connection tool for a wire connection connector is provided.

[0009]

A pair of wire connectors in which a pair of wire core wires are inserted in advance between the connector cover and the connector body are placed on the placement surface of the lower jaw. At this time, the pressing plate is disposed at the pressing position below the upper jaw by the bias of the first spring means, and the cutter blade is concealed. Therefore, the one-core cable connector is sandwiched between the crimp plate and the lower jaw by the bias of the second spring means.
Next, when the support handle and the operating handle are squeezed with one hand to rotate the operating handle, the one-core cable connector is compressed between the crimp plate and the lower jaw, and the pair of wire cores and the connector cover are attached to the connector body. It is crimped. Subsequently, by further squeezing each handle, the lower jaw, that is, the one-core connector, presses the crimp plate upward. This allows the crimp plate to
The pair of cutter blades is moved to the upper retracted position against the bias of the first spring means, and the pair of cutter blades is exposed to cut the pair of wire cores crimped to the one-core connector.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 to 3 show a crimping connection tool according to an embodiment of the present invention. FIGS. 4 and 5 show a one-core connector for crimping a wire core using the crimp connection tool.

As shown in FIG. 4, a one-core cable connector 1 (hereinafter, simply referred to as a pair connector 1) which can use the crimping connection tool of the present invention includes a body 3 having a pair of male and female contacts 2 therein. , And an integral cover 4 pre-assembled to the main body 3. The cover 4 has a projecting edge 5 that is stepped toward the front side of the pair of connectors 1.
The hole 6 through which the cutter blade for cutting the core wire passes is formed in each stage. As shown in FIG. 5, a holding portion 7 for holding a pair of wire cores W is formed below the cover 4, and the wire core W is first inserted into the holding portion 7 during the crimping operation (FIG. 5).
(A)) Then, the cover 4 is pressed down by hand and pre-press-bonded (initial press-bonding) to hold the core wire W (FIG. 5B). Then, by further pressing the cover 4 by appropriate means, the wire core wire W is press-fitted into the U-shaped blade portion 8 of each contact 2, and conduction is obtained.
The cover 4 is attached to the main body 3. Then, wire core W
The surplus length is cut off to complete the connection work (FIG. 4
(B)). In addition, a hole 9 for positioning on the tool head of the crimping connection tool of the present invention described later is formed on the bottom surface of the main body 3.

The present invention makes it possible to carry out the above-mentioned crimping connection operation of the pair of connectors 1 reliably and easily. As shown in FIG. 1, a crimp connection tool 10 according to an embodiment of the present invention includes a pair of handles 1 rotatably connected to each other.
2 and 14 and a tool head 16 mounted on the upper end of one handle 12. One handle 12 constitutes a support handle, and the other handle 14 constitutes an operating handle. The operating handle 14 has a substantially L-shape, and is pivotally connected by a shaft 18 near the upper end of the support handle 12 at a bent portion disposed at the upper end thereof. Operating handle 14
Each end of the tension coil spring 20 is hooked to each of the one end 14a close to the bent portion and the lower end 12a of the support handle 12, and the handles 12, 14 are normally urged by the tension coil spring 20. Is placed open as shown by the solid line in the figure.

The tool head 16 has an upper jaw 24 fixedly installed upward through a column 22 which is erected and fixed to the upper end of the support handle 12, and has a predetermined distance from the upper jaw 24. And a lower jaw 26 arranged to be movable in the vertical direction in conjunction with the operation of the operation handle 14. The column 22 is provided with a peephole 28 in which the center is hollowed out in a gate shape and the tool head 16 is formed to penetrate the tool head 16 back and forth (see FIGS. 2 and 3). The upper jaw 24 vertically projects forward from the column 22, and has two cutter blades 30 juxtaposed near its tip and projecting downward parallel to one side surface. Further, below the upper jaw 24, a crimp plate 32 that can move in the vertical direction is installed.

As shown in FIGS. 2 and 3, the crimp plate 32 has a pressing surface 34 that can evenly press the cover 4 of the pair of connectors 1 during a crimping operation described below.
On the opposite surface, a rod 36 and a guide plate 3 extending vertically.
8 is extended. The upper jaw 24 has a cavity 40 recessed upward from the lower surface thereof, and the rod 36 and the guide plate 38 of the crimping plate 32 are inserted into the cavity 36. The rod 36 penetrates the upper end plate 42 of the upper jaw 24 and is supported by a ring 44 locked at the end thereof. In the hollow portion 40, a first compression coil spring 46 is disposed between the upper end plate 42 of the upper jaw 24 and the pressure plate 32 by winding the rod 36. Therefore, the crimp plate 32
Is normally pushed downward by the biasing of the compression coil spring 46 and is placed at a protruding position as shown in the drawing, and during the crimping operation to be described later, the compression coil spring 46 is pressed by pressing the pair of connectors 1 from below. The guide plate 38 moves upward while guiding along the cavity 40 of the upper jaw 24 against the urging of the upper jaw 24.

The lower jaw 26 has a receiving portion 50 having side and rear supporting walls 48 and 49 for receiving the main body 3 of the connector 1, and the bottom surface of the receiving portion 50, that is, the connector main body 3 is placed thereon. The mounting surface 52 is provided with a positioning projection 54 that matches the hole 9 formed on the bottom surface of the connector body 3. The mounting surface 52 is disposed substantially parallel to the pressing surface 34 of the pressure plate 32. The lower jaw 26 has a lower leg 56 extending below the receiving portion 50, and the lower leg 56 slidably passes through the base 22 a extending forward at the lower end of the column 22. The lower leg 56 is provided at the base 2 of the column 22.
2a, extends into the support handle 12 below the lower leg 56.
A hole 58 formed in the front of the support handle 12
A lever 60 extending forward through (FIG. 1) protrudes. Further, a pin 62 is inserted in the transverse direction in the vicinity of the lower end of the lower leg 56, and a shoulder 64 (FIG. 1) on the upper end surface of the operating handle 14 is brought into contact with the lower surface of the pin 62 during a crimping operation described later. It comes into contact.

A groove 66 is formed on the rear surface of the lower leg 56 of the lower jaw 26 in the vertical direction, and the base 2 of the column 22 is
The tip of the support plate 68 fixed to the lower surface of 2a is housed in the groove 66. In the groove 66, a second compression coil spring 70 is disposed between the upper end wall 66a and the support plate 68.
The second compression coil spring 70 has a considerably smaller spring force than the first compression coil spring 46 mounted on the upper jaw 24, and usually the bias of the second compression coil spring 70 The tip of the rear protruding portion 48 a of the side wall 48 of the receiving portion 50 is in contact with the pressing surface 34 of the pressing plate 32. The connector receiving height of the receiving portion 50 thus formed is smaller than the height of the pair of connectors 1 when the crimping is completed.

The procedure and operation for performing the crimping connection operation of the pair of connectors 1 using the crimping connection tool 10 configured as described above will be described below. First, the wire core W is inserted into the pair of connectors 1 and pre-pressed by hand. The pair of connectors 1 in this state is placed on the receiving portion 50 such that the projection 54 of the receiving portion 50 of the lower jaw 26 fits into the hole 9 on the bottom surface. At this time, the lever 60 at the lower end of the lower jaw 26 is operated to move the lower jaw 26 downward against the bias of the second compression coil spring 70 to secure the receiving space, and then place the pair of connectors 1. I do. Therefore, after the mounting, the pair of connectors 1 is connected to the second compression coil spring 7.
With the bias of 0, the holding portion 52 is held between the mounting surface 52 of the receiving portion 50 and the pressing surface 34 of the pressure bonding plate 32.

Next, the lower end of each of the handles 12, 14 is gripped with one hand, and the operating handle 14 is rotated clockwise in FIG. Later, the shoulder 64 of the operating handle 14
Abuts the pin 62 of the lower jaw 26, and the pair of connectors 1
With the lower jaw 26 upward and flat against the upper jaw 24.
It moves while maintaining the line state . Here, by setting the spring force of the first compression coil spring 46 installed on the upper jaw 24 to be sufficiently large, first, the lower jaw 26
The pair of connectors 1 is compressed between the mounting surface 52 and the pressing surface 34 of the crimp plate 32, and the cover 4 is crimped to the main body 3 together with the wire core W. At this time, the placing surface 52 of the lower jaw 26 and the pressing surface 34 of the pressure plate 32 are arranged substantially in parallel, so that the cover 4 is prevented from being partially pressed,
The wire core W is crimped accurately and reliably.

Subsequently, when the handles 12 and 14 are further gripped as they are (using both hands if desired), the pressing of the lower jaw 26 and the crimped pair of connectors 1 causes the pressing plate 32 to press the first compression coil spring 46. The cutter blades 30 move upward against the urging force of the pair, and each of the two cutter blades 30 has a hole 6 formed in the cover 4 of the pair of connectors 1.
, A pair of wire core wires W placed thereunder is cut to remove the extra length.

As described above, in the crimping connection tool 10, since the crimping and cutting of the wire core wire W is performed by one operation, the crimping and cutting work can be speeded up, and a method of applying force, that is, each force is applied. By adjusting the speed at which the handles 12, 14 are squeezed or the spring force of the first compression coil spring 46, a desired time difference can be set between the crimping operation and the cutting operation. In addition, a desired work order can be set such that the crimping of a large number of the paired connectors 1 is performed first, and then the extra long wires are cut, and the work efficiency can be improved.

The viewing hole 28 provided in the column 22 of the tool head 16 allows the pair of connectors 1 sandwiched between the crimping plate 32 and the lower jaw 26 to be visible from behind the tool. Existing wire core W
It is possible to allow any tool posture defined by the installation space of the above and the orientation of the pair of connectors 1 to be connected.

[0022]

As described above, the crimping connection tool according to the present invention has a fixed upper jaw, a pair of cutter blades extending downward in parallel with each other, a crimping position for concealing each cutter blade, and each cutter. A crimp plate that can be moved up and down between the retracted position to expose the blade, and a biasing force of the first spring means when the one-core connector is clamped between the upper jaw and the lower jaw. First, the connector cover and the wire core are crimped to the connector main body, and then the handle is further tightened, and the wire core wire is cut by moving the crimp plate against the bias of the first spring means. With a single gripping operation, crimping of a pair of wire cores and a connector cover, and cutting of the excess length of each wire core can be performed reliably and quickly with one tool. It can be. In addition, setting a desired time difference between the crimping operation and the cutting operation by adjusting how to apply a force to the work, that is, adjusting the speed of squeezing each handle and / or the spring force of the first spring means. In addition, the hand tool has a simple structure and is easy to carry, so that work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a crimp connection tool according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a tool head of the crimp connection tool of FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIGS. 4A and 4B are perspective views of (a) before crimping and (b) after crimping of the one-core cable connector to which the crimping connection tool of the present invention can be applied.

5 is a front view of (a) before crimping and (b) pre-crimping of the one-core cable connector shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Crimping connection tool 12 ... Support handle 14 ... Operation handle 20 ... Tension coil spring 22 ... Column 24 ... Upper jaw 26 ... Lower jaw 28 ... Peep hole 30 ... Cutter blade 32 ... Crimping plate 34 ... Pressing surface 46 ... First compression Coil spring 50 ... Receiving part 52 ... Placement surface 60 ... Lever 62 ... Pin 64 ... Shoulder 66 ... Groove 70 ... Second compression coil spring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Masanori Suezawa 3-8-8 Minamihashimoto, Sagamihara City, Kanagawa Prefecture Within Sumitomo 3M Limited (72) Inventor: Chiho Oike 3-8-8, Minamihashimoto, Sagamihara City, Kanagawa Prefecture Sumitomo Inside of 3M Co., Ltd. (72) Inventor Takafumi Sakaguchi 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Yasuhiko Tanabe 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Incorporated (72) Inventor Masahiro Suzuki 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Ltd.

Claims (2)

(57) [Scope of request for utility model registration] 1. A one-core cable comprising: a connector body containing a pair of contacts; and a connector cover attached to the connector body while crimping a wire core on each of the pair of contacts. A crimping connection tool for connecting a wire core to a connection connector, comprising: a fixed upper jaw; fixed to the upper jaw;
A pair of cutter blades, and a flat pressing surface that abuts against and presses against the connector cover, and a lower crimping position below the upper jaw that conceals each of the cutter blades and can abut against the connector cover. A pressure plate disposed so as to be vertically movable between an upper retraction position for exposing the respective cutter blades; a first spring means for urging the pressure plate to the lower pressure position; A movable lower jaw that has a mounting surface for mounting the connector body substantially parallel to the pressing surface of the movable jaw, and that is vertically movably installed below the upper jaw at a predetermined interval; A second spring means having a spring force smaller than a spring force of the spring means to urge the lower jaw upward; and a fixed arrangement of the upper jaw at an upper end via a fixed column, Against serial upper jaw
A support handle for supporting the vertical direction to move capable while maintaining a parallel state, while being rotatably journalled in said support handle, the upper jaw direction the lower jaw in conjunction with its own rotation An operating handle for pressing and moving the wire core to the crimping plate and the lower jaw. A crimping connection tool for a one-core wire connector, characterized in that it can be carried out in any way. 2. The connector according to claim 1, wherein a through-hole is provided in the fixing column for fixing and disposing the upper jaw, and a mounting surface of the lower jaw is disposed in front of the through-hole. Crimp connection tool.