JPH0662494U - Crimping connection tool for one-core cable connector - Google Patents

Abstract

(57) [Summary] [Object] To provide a crimp connection tool for a pair of core wire connection connectors, which can perform core wire crimping and extra length core wire cutting continuously with one hand tool. [Structure] The crimp connection tool 10 includes a fixed upper jaw 2
4 and a pair of cutter blades 3 fixed to the upper jaw 24
0, and a crimping plate 32 arranged below the upper jaw 24 so as to be vertically movable between a lower crimping position for concealing each cutter blade 30 and an upper retracted position for exposing each cutter blade 30, A first coil spring that urges the plate 32 to the crimping position, a movable lower jaw 26 that is installed below the upper jaw 24 at a predetermined interval so as to be vertically movable, and urges the lower jaw 26 upward. And a second coil spring. The upper jaw 22 is fixedly arranged on the upper end of the support handle 12, and the lower jaw 24 is rotatably attached to the support handle 12 by the operating handle 1.
4 pushes and moves in the direction of the upper jaw 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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 single-wire crimping and a surplus length cutting of a pair of core wire connecting connectors for connecting a pair of telephone line cables. The present invention relates to a crimp connection tool that can be continuously performed by gripping a handle.

[0002]

[Prior art]

 Conventionally, as connectors for connecting telephone line cables, connectors with various logarithms (number of contacts) have been used to connect the required number of lines, and connectors of the same male and female structure can be fitted together. Something is known. Generally, a connector having the same male and female structure has one 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 of the same structure are fitted to each other. In this case, both male contacts and female contacts are connected to form a single line contact pair.

In this type of connector for telephone line connection, when connecting the wire core of the telephone line cable to the connector, U formed on the upper part of each of the male contact and female contact installed inside the main body of the connector Each of the pair of core wires is placed on the blade and the cover is pressed from above to crimp each core wire to each contact, and at the same time, the cover is attached to the main body. At this time, each wire core wire is cut into a desired length before being crimped to each contact, and a method is adopted in which no extra length core wire is left after the crimping. In addition, a cutter blade is installed inside the body of the connector to cut the extra length of the core wire, and the extra length core wire is automatically cut and removed at the same time when the core wire is crimped. It is well known. Alternatively, while pressing the core wire, form a plurality of holes through which the cutter blade for cutting the wire core wire passes in the cover that is attached to the connector body, and cut the extra length after or at the same time when the core wire is crimped. Some have a structure that can be removed.

As described above, when the wire core wire whose excess length is cut in advance is used, or when the connector having the cutter blade is used, when the wire core wire is crimped and connected, the directions of the wires are changed by operating the handle. It is possible to use a simple crimping punch with a pair of opposed jaws that move to. For a connector cover with multiple holes through which the cutter blades pass, crimp the core wire with the above-mentioned crimping pliers and then cut the extra long core wire using another cutter, or For example, a crimping device having a plurality of cutter blades as disclosed in Japanese Patent Laid-Open No. 63-207075 is used.

[0005]

[Problems to be solved by the device]

 The crimping device with multiple cutter blades described above can crimp and cut the wire core wire with one device, but the target connector is a multi-pair core wire connection connector for multi-line connection. Inevitably, the device size becomes large and the structure becomes complicated. Also, since a large compression force is required for crimping the core wire of the multi-pair core connector, the device is required to have high rigidity, and the device must be firmly fixed to the support base during work. Therefore, this device cannot be used for the one-wire connector for connecting one line. The one-to-one connector may often be attached to a desired one of the telephone line cables already installed in the workplace. In such a case, use of hand tools such as crimping pliers. It is convenient. Therefore, as described above, the extra length of the wire core wire is cut in advance, or a pair of core wire connecting connectors with a built-in cutter blade is used, but cutting the core wire in advance complicates the work. Since it requires a separate cutting tool, it is unsuitable in the current situation where rapid crimping and cutting work is required, and incorporating a cutter blade in the connector hinders miniaturization of the connector. It is a thing.

The present invention has been made in view of these problems, and an object thereof is to quickly perform crimping of a core wire to a connector for connecting a pair of core wires and cutting of an extra length core wire with one hand tool. An object of the present invention is to provide a crimp connection tool for a one-to-one core wire connection connector.

[0007]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a crimp connection tool for a connector for connecting a pair of core wires, a fixed upper jaw, and a pair of cutters fixed to the upper jaw and extending downward in parallel with each other. It has a blade and a flat pressing surface that abuts against and presses against the connector cover. Below the upper jaw, the cutter blades are concealed and the lower crimping position where the cutter cover can abut the connector cover. And a crimping plate that is vertically movable between the upper retracting position that exposes the cutter blades, first spring means that urges the crimping plate to the lower crimping position, and the crimping A movable lower jaw that has a mounting surface for mounting the connector body substantially parallel to the pressing surface of the plate, and is vertically movable below the upper jaw at a predetermined interval; First spring means Second spring means for urging the lower jaw upward with a spring force smaller than the spring force, and the upper jaw fixedly arranged on the upper end via a fixed column, the lower jaw being fixed to the upper jaw. And a support handle that supports parallel movement in the vertical direction, and is rotatably attached to the support handle.The lower jaw moves in the upper jaw direction in conjunction with the rotation operation of itself. An operating handle for pressing and moving is provided, and the pair of core wire connecting connectors is sandwiched between the crimping plate and the lower jaw, and the crimping and cutting of the wire core wire can be continuously performed by one handle grasping operation. It is characterized in that it can be carried out.

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

[0009]

[Action]

 A pair of core wire connecting connectors in which a pair of wire core wires are inserted between the connector cover and the connector body in advance are mounted on the mounting surface of the lower jaw. At this time, the crimping plate is arranged at the crimping position below the upper jaw by the biasing force of the first spring means, and the cutter blade is hidden. Therefore, the paired core wire connector is clamped between the crimping plate and the lower jaw by the urging force of the second spring means. Next, when the support handle and the operating handle are gripped with one hand and the operating handle is rotated, the pair of core wire connecting connectors are compressed between the crimp plate and the lower jaw, and the pair of wire core wires and the connector cover are connected to each other. Is crimped to. Then, by further tightening each handle, the lower jaw, that is, the connector for connecting the core wires, pushes the crimping plate upward. As a result, the crimping plate moves to the upper retracted position against the bias of the first spring means, the pair of cutter blades are exposed, and the pair of wires crimped to the pair of core wire connecting connectors is crimped. Cut the core wire.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 to 3 show a crimp connection tool according to an embodiment of the present invention. FIG. 4 and FIG. 5 show a pair of core wire connecting connectors for crimping a wire core wire by using this press connection tool.

As shown in FIG. 4, a pair of core wire connecting connector 1 (hereinafter, simply referred to as a pair of connectors 1) in which the crimping connecting tool of the present invention can be used is a main body having a pair of male and female contacts 2 built therein. 3 and an integral cover 4 preassembled to the main body 3. The cover 4 has projecting edge portions 5 that are stepped toward the front side of the pair of connectors 1, and holes 6 through which a cutter blade for cutting the core wire passes are formed in each step of the projecting edge portions 5. As shown in FIG. 5, a holding part 7 for holding a pair of wire core wires W is formed on the lower side of the cover 4, and the wire core wires W are first inserted into the holding parts 7 during the pressing work (see FIG. 5 (a)), and then the cover 4 is manually pushed down to perform pre-crimping (initial crimping) to hold the wire core wire W (FIG. 5 (b)). Then, by further pressing the cover 4 by an appropriate means, the wire core wire W is press-fitted into the U-shaped blade portion 8 of each contact 2 to obtain conduction, and the cover 4 is attached to the main body 3. After that, the extra length portion of the wire core W is cut to complete the connection work (FIG. 4B). A hole 9 is formed on the bottom surface of the main body 3 for positioning on the tool head of the crimp connection tool of the present invention, which will be described later.

The present invention makes it possible to reliably and easily carry out the crimping connection work of the above-mentioned paired connector 1. As shown in FIG. 1, a crimp connection tool 10 according to an embodiment of the present invention comprises a pair of handles 12 and 14 that are rotatably connected to each other, and a tool head mounted on the upper end of one handle 12. 16 and. One handle 12 constitutes a supporting handle and the other handle 14 constitutes an actuating handle. The operating handle 14 has a substantially L-shape, and is pivotally attached to the vicinity of the upper end of the support handle 12 by a shaft 18 at a bent portion arranged at the upper end thereof. Each end of the tension coil spring 20 is hooked on each of the one end 14a near the bent portion of the actuation handle 14 and the bottom end 12a of the support handle 12, and normally each of them is biased by the tension coil spring 20. The lower ends of the handles 12, 14 are placed in an open state as shown by the solid lines in the figure.

The tool head 16 has an upper jaw 24 that is fixedly installed above via a column 22 that is erected and fixed to the upper end of the support handle 12, and a predetermined interval with respect to the upper jaw 24. In addition, the lower jaw 26 is arranged so as to be movable in the vertical direction in conjunction with the operation of the operation handle 14. The column 22 is provided with a peep hole 28 in which the tool head 16 is formed by penetrating the center of the tool head 16 in the front-rear direction (see FIGS. 2 and 3). The upper jaw 24 projects vertically from the column 22 forward, and has two cutter blades 30 juxtaposed in proximity to the tip thereof and projecting downward parallel to one side surface. Further, below the upper jaw 24, a crimping plate 32 movable in the vertical direction is installed.

As shown in FIGS. 2 and 3, the crimping plate 32 has a pressing surface 34 that can evenly press the cover 4 of the paired connector 1 at the time of a crimping operation described later, and the opposite surface thereof. A rod 36 and a guide plate 38 extending in the vertical direction are extended. The upper jaw 24 has a cavity 40 recessed upward from the lower surface side thereof, and the rod 36 of the crimping plate 32 and the guide plate 38 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 tip thereof. In the cavity 40, a first compression coil spring 46 is arranged by winding a rod 36 between the upper end plate 42 of the upper jaw 24 and the crimping plate 32. Therefore, the pressing plate 32 is normally pressed by the biasing force of the compression coil spring 46 to the lower side of the upper jaw 24 and placed in the projecting position as shown in the drawing. The pressing plate moves against the urging force of the compression coil spring 46 and moves upward while guiding the guide plate 38 along the cavity 40 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 pair of connectors 1, and the bottom surface of the receiving portion 50, that is, the connector body 3 is mounted on the lower jaw 26. The mounting surface 52 is provided with a positioning projection 54 aligned with the hole 9 formed in the bottom surface of the connector body 3. The mounting surface 52 is arranged substantially parallel to the pressing surface 34 of the pressure bonding plate 32. The lower jaw 26 has a lower leg portion 56 extending downward of the receiving portion 50, and the lower leg portion 56 slidably penetrates a base portion 22 a extending forward of the lower end of the column 22. The lower leg portion 56 extends into the supporting handle 12 below the base portion 22a of the column 22, and the lower end portion of the lower leg portion 56 is moved forward through a hole 58 (FIG. 1) formed in the front surface of the support handle 12. An extending lever 60 is projected. Further, a pin 62 is inserted in the transverse direction in the vicinity of the lower end of the lower leg portion 56, and a shoulder portion 64 (FIG. 1) on the upper end surface of the actuating handle 14 is located on the lower surface side of the pin 62 during a crimping operation described later. It comes to abut.

A groove 66 is formed in the vertical direction on the rear surface side of the lower leg portion 56 of the lower jaw 26, and the tip of a support plate 68 fixed to the lower surface of the base portion 22 a of the column 22 is housed in the groove 66. It A second compression coil spring 70 is disposed in the groove 66 between the upper end wall 66 a and the support plate 68. The second compression coil spring 70 has a much smaller spring force than the first compression coil spring 46 installed in the upper jaw 24, and normally the biasing of the second compression coil spring 70 causes the lower jaw 26 to move. The tip of the rearward 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 paired connector 1 when the crimping is completed.

The procedure and operation when performing the crimp connection operation of the paired connector 1 using the crimp connection tool 10 configured as described above will be described below. First, the wire core wire W is inserted into the pair of connectors 1 and pre-compression-bonded by hand. The paired connector 1 in this state is placed on the receiving portion 50 such that the protrusion 54 of the receiving portion 50 of the lower jaw 26 is fitted into the hole 9 on the bottom surface thereof. 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 a receiving space, and then the paired connector 1 is mounted. Place. Therefore, the mounted paired connector 1 is held between the mounting surface 52 of the receiving portion 50 and the pressing surface 34 of the crimping plate 32 by the urging of the second compression coil spring 70.

Next, when the lower ends of the handles 12 and 14 are gripped with one hand and the actuating handle 14 is rotated clockwise with respect to the shaft 18 in the figure against the bias of the tension coil spring 20, a slight play motion occurs. After that, the shoulder 64 of the actuating handle 14 contacts the pin 62 of the lower jaw 26 and moves the lower jaw 26 together with the pair of connectors 1 upward. Here, by setting the spring force of the first compression coil spring 46 installed in the upper jaw 24 to be sufficiently large, first, between the mounting surface 52 of the lower jaw 26 and the pressing surface 34 of the crimping plate 32. Then, the pair of connectors 1 is compressed, and the cover 4 is crimped to the main body 3 together with the wire core wire W. At this time, since the placing surface 52 of the lower jaw 26 and the pressing surface 34 of the crimping plate 32 are arranged substantially parallel to each other, the pushing of the cover 4 is prevented and the wire core W is crimped accurately and surely. It

Subsequently, when the handles 12 and 14 are further gripped as they are (using both hands as desired), the lower jaw 26 and the pair of connectors 1 which have been crimped are pressed, so that the crimping plate 32 moves to the first compression coil. It moves upward against the biasing force of the spring 46, and accordingly, each of the two cutter blades 30 passes through the hole 6 provided in the cover 4 of the pair of connectors 1 and a pair of wires placed therebelow. Cut the core wire W and remove the extra length.

As described above, in the crimping and connecting tool 10, since the crimping and cutting of the wire core wire W are performed by one operation, the crimping and cutting work can be speeded up, and the force application method, By adjusting the speed of gripping the handles 12 and 14 or the spring force of the first compression coil spring 46, it is possible to set a desired time difference between the crimping operation and the cutting operation. In addition, a desired work sequence can be set, for example, by first crimping a large number of paired connectors 1 and then cutting the extra long core wires thereof, thereby improving work efficiency.

The peep 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 visually recognized from the rear of the tool. It is possible to allow any tool posture defined by the installation space of the existing wire core W and the orientation of the paired connector 1 to be connected.

[0022]

[Effect of device]

 As described above, the crimp connection tool according to the present invention has a pair of cutter blades extending downward in parallel with each other on a fixed upper jaw, a crimping position for concealing each cutter blade, and a retraction for exposing each cutter blade. Equipped with a crimping plate that can move up and down with respect to the position, and when the pair of core wire connecting connectors is clamped and clamped between the upper jaw and the lower jaw, the connector is first pushed by the biasing force of the first spring means. The cover and the wire core wire are crimped to the connector body, and then the handle is further gripped, and the wire core wire is cut by moving the crimping plate against the bias of the first spring means. With the handle grasping operation, the pair of wire core wires and the connector cover can be crimped and the extra length of each wire core wire can be cut continuously and reliably with one tool.In addition, a desired time difference is set between the crimping work and the cutting work by adjusting the method of applying force to the work holding force, that is, the speed of gripping each handle and / or the spring force of the first spring means. In addition, it is a hand tool that has a simple structure and is convenient to carry and carry, thus improving work efficiency.

[Brief description of 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.

3 is a cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view of a paired core wire connector to which the crimp connection tool of the present invention can be applied, before (a) crimping and (b) after crimping.

5 is a front view of the connector for connecting a pair of core wires in FIG. 4 before (a) crimping and (b) pre-crimping.

[Explanation of symbols]

 10 ... Crimping connection tool 12 ... Support handle 14 ... Actuation 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 ... Receptor 52 ... Placement surface 60 ... Lever 62 ... Pin 64 ... Shoulder 66 ... Groove 70 ... Second compression coil spring

Front page continuation (72) Masanori Suezawa 3-8-8 Minamihashimoto, Sagamihara-shi, Kanagawa Sumitomo 3M Co., Ltd. (72) Chiho Oike 3-8-8 Minamihashimoto, Sagamihara-shi, Kanagawa Sumitomo 3M Co., Ltd. (72) Inventor Takatomi Sakaguchi 1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Inventor Yasuhiko Tanabe 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation Inside the company (72) Creator Masahiro Suzuki 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Stock Company

Claims (2)

[Scope of utility model registration request] 1. A pair of core wires comprising a connector main body containing a pair of contacts, and a connector cover attached to the connector main body while crimping a wire core wire to each of the pair of contacts. In a crimp connection tool for connecting a wire core to a connection connector, a fixed upper jaw, fixed to the upper jaw, and extending downward in parallel with each other 1
A lower crimping position that has a pair of cutter blades and a flat pressing surface that abuts against and presses against the connector cover, conceals the cutter blades below the upper jaw, and can abut the connector cover. And a crimping plate which is arranged so as to be vertically movable between an upper drawing position exposing the cutter blades, first spring means for urging the crimping plate to the lower crimping position, and the crimping plate A movable lower jaw, which has a mounting surface for mounting the connector body substantially parallel to the pressing surface of the connector, and is movably installed vertically below the upper jaw at a predetermined interval; Second spring means having a spring force smaller than that of the spring means for urging the lower jaw upward, and the upper jaw fixedly arranged at the upper end via a fixing column, and the lower jaw A support handle that supports the upper jaw so as to be vertically movable in parallel, and a support handle that is rotatably attached to the support handle and that moves the lower jaw in the upper jaw direction in conjunction with the rotation operation of itself. An operating handle for pressing and moving the wire core is continuously sandwiched between the crimping plate and the lower jaw while the pair of core wire connecting connectors is sandwiched between the crimping plate and the lower jaw. A crimp connection tool for a pair of core wire connection connectors, which is characterized by being practicable. 2. The paired core wire connector according to claim 1, wherein a through hole is provided in the fixed column for fixedly arranging the upper jaw, and a mounting surface of the lower jaw is arranged in front of the through hole. Crimp connection tool.