JPH0515331U - Connection terminal for undercarpet cable - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a connection terminal for an undercarpet cable that can be crimped continuously with a relatively small force using a small tool, has good work efficiency, and has high connection reliability. [Structure] A pair of terminal pieces 8 and 8'constituting the connection terminal 7 of the present invention are two claw-shaped projections 9, 9'and 2 at four corners of one side of a rectangular plate-like body made of a conductive metal. The two receiving holes 10 and 10 'are alternately provided, and a large number of small needle-like protrusions 11 and 11' are formed on the surface where these are formed. Then, when these terminal pieces 8 and 8 ′ are arranged on both upper and lower surfaces of a stack of two undercarpet cables 12 and pressure-bonded to each other, the claw-shaped projections 9 of one terminal piece 8 cause the undercarpet cable 12 to move. Of the other terminal piece 8 by penetrating the connecting portion insulator 13 in the thickness direction.
'Is inserted into and engaged with the corresponding receiving hole 10', and at the same time, the large number of needle-shaped projections 11 and 11 'of both terminal pieces 8 and 8'are
The cable insulator 13 on the corresponding side is pierced and abuts on the outer peripheral surface of the conductor 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a connection terminal for connecting conductors of a flat undercarpet cable to each other.

[0002]

[Prior Art]

 In recent years, the demand for flat multicore cables has been increasing instead of round single core cables for individual power distribution. This cable is branched from the main power bus and is routed inside the office on the floor below the carpet, and is usually called the undercarpet cable.

In order to connect the conductors of such an undercarpet cable to each other, the following connection terminals made of a conductive metal have been conventionally used. That is, as shown in a perspective view in FIG. 2, a hollow rivet type connecting terminal 2 having a plurality of spear-shaped projections 1 on a rear end flange portion is used, and this connecting terminal 2 is used as a double undercarpet cable. After hammering into the stack, the hollow rivet-shaped tip that penetrates the cable conductor and projects to the opposite side is crimped into a snap-fit shape, and at the same time the spear-shaped projection 1 at the rear end is used to insulate the cable on the tapped side. A method of contacting the body with a piercing conductor is used.

Further, as shown in a perspective view in FIG. 3, a large number of small tooth-shaped projections 3 are formed on the inner main surface of the conductive metal plate that can be folded in two along the center line. Bendable connection terminals 4 are also used. When connecting with such connecting terminals, two undercarpet cables 5 and 5'are overlapped and holes 6 penetrating the front and back are formed in these conductors, respectively. Insert the bent connection terminal 4 into the upper part of the cable stack, sandwich the cable stack from above and below with the two bent arms, and then apply pressure from the outside so that the grated tooth-like small projection 3 is placed on each side of the undercarpet cable 5, 5 The method of piercing the insulator of 'to contact the conductor is adopted. In addition, when manufacturing an undercarpet cable in advance, holes are formed at appropriate intervals in the insulator part that connects the multicore conductors, and the bent connection terminals 4 are inserted into these holes and pressure-bonded. Has also been done.

[0005]

[Problems to be solved by the device]

 However, the former hollow rivet-type connecting terminal 2 among the above-mentioned conventional connecting terminals has the advantage that it can be continuously driven into the undercarpet cable, while the hollow rivet portion is caulked. Therefore, a very large force (about 1 ton per unit area) is required, and a large caulking tool has to be used, which causes a problem that the equipment cost and the labor of the work increase.

On the other hand, in the latter bent type connection terminal 4, since a large number of small tooth-shaped projections 3 are brought into contact with the conductor, the connection is highly reliable and is smaller than the hollow rivet type connection terminal 2. Since it can be crimped by pressing force, it has the advantage that a small tool is sufficient. However, in order to connect the conductors of the undercarpet cables 5 and 5 ', usually, work is performed using three or more connection terminals for one connection point, but with the bent connection terminal 4, a pressure Before connecting, the connection terminal must be inserted into the specified hole 6 and the cable stack must be mounted so as to be sandwiched from above and below, and two steps are required, so continuous work is not possible and efficiency is low. there were.

The present invention has been made to solve these problems, and it is possible to perform continuous crimping with a relatively small force using a small tool, resulting in good working efficiency and high connection reliability. An object is to provide a connection terminal for an undercarpet cable.

[0008]

[Means for Solving the Problems]

 The connection terminal for an undercarpet cable of the present invention comprises a plurality of claw-shaped projections that are driven into the peripheral portion of a plate made of a conductive metal so as to penetrate through the insulator of the connection portion of the undercarpet cable in the thickness direction. A receiving hole into which the claw-shaped projection driven from the opposite surface side is inserted is provided, and the surface of the claw-shaped projection is pierced with the insulator of the undercarpet cable to form a conductor. It is characterized in that it is composed of a pair of terminal pieces on which a large number of small needle-like protrusions to be abutted are formed.

[0009]

[Action]

 In the connection terminal for undercarpet cable of the present invention, a pair of terminal pieces constituting the connection terminal are provided with claw-shaped projection-forming surfaces on the upper and lower sides of the two undercarpet cable to be connected. By arranging them so that they face each other and applying pressure from both sides, a plurality of claw-shaped projections provided on the peripheral edge of each terminal piece penetrate the cable connecting part insulator in the thickness direction and Project to the opposite side, and are inserted and engaged in the receiving holes provided at the corresponding positions of the other terminal piece. In this way, the pair of terminal pieces are crimped and fixed at the opposite positions on the outer peripheral surface of the cable. At this time, a large number of needle-like small projections formed on the inner surfaces of the pair of terminal pieces facing each other penetrate the cable insulator on each side, and the tips come into contact with the conductor, which results in reliable electrical conductivity. Connection is made.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a connection terminal for an undercarpet cable of the present invention.

In the figure, reference numeral 7 indicates a connection terminal, which is composed of a pair of terminal pieces 8 and 8 ′ having the same shape and structure as shown below. That is, each of the terminal pieces 8 and 8'is a rectangular plate-shaped body made of a corrosion-resistant conductive metal such as copper, phosphor bronze, brass, and aluminum, and has two claw-shaped projections 9 at four corners on one side. 9'and two receiving holes 10,10 'are provided alternately, that is, the same kind is diagonally located, and a surface provided with these claw-shaped projections 9,9' In addition, a large number of small needle-shaped protrusions 11 and 11 'are formed. Here, in order to provide the claw-shaped projections 9 and 9'on each of the terminal pieces 8 and 8 ', for example, a method of pushing and bending a corner portion of a rectangular plate-shaped body with a tool or the like is adopted. Further, in order to form the small needle-shaped projections 11 and 11 ', a method of sticking out a separately formed needle-shaped member to the main surface of the plate-shaped body in addition to the method of projecting with a tool from the opposite surface side, etc. Is taken.

Next, a usage mode of the connection terminal 7 of such an embodiment will be described. That is, a pair of upper and lower terminal pieces 8 and 8'are respectively arranged on the upper and lower surfaces of a stack of two undercarpet cables 12 (only one cable is shown in the figure for simplicity). And pressurize from both sides. Then, the two claw-shaped projections 9 of one of the terminal pieces 8 penetrate the insulators 13 of the connecting portions of both undercarpet cables 12 in the thickness direction to project to the opposite sides, and the projecting portions to the other side. The terminal piece 8'is inserted into a receiving hole 10 'provided at a corresponding position and mechanically engaged. At the same time, a large number of small needle-like protrusions 11 and 11 ′ formed on the opposite surfaces of both terminal pieces 8 and 8 ′ are pierced through the insulator 13 of the cable on the corresponding side and the conductor 14 Contact the outer peripheral surface.

Since the conductors 14 of the two undercarpet cables 12 are electrically connected via the needle-like small protrusions 11 and 11 ′ of the pair of terminal pieces 8 and 8 ′ thus crimped in this manner, the connection Highly reliable. Moreover, it is sufficient to pierce the needle-like small projections 11 and 11 'with the insulator 13 of one cable in the thickness direction and crimp it, so that the force required for crimping is as small as 400 kg per unit area. The size and weight of the tool can be reduced. Furthermore, since the terminal pieces 8 and 8'can be crimped to the required positions in one step, the work can be continuously performed, and the work efficiency is high. Furthermore, since the two terminal pieces 8 and 8'having the same shape in which the number and arrangement position of the claw-shaped projections 9 and 9'and the receiving holes 10 and 10 'are the same are used as a pair, the manufacturing is easy. Not only is it easy, but there is little risk of incorrect attachment to the cable.

In the above embodiment, the connection terminals 7 are formed by using two terminal pieces 8 and 8 ′ having the same shape and having the same number and arrangement position of the claw-shaped projections 9 and 9 ′ and the receiving holes 10 and 10 ′. However, the present invention is not limited to this. That is, the receiving hole 10 'is provided in the other terminal piece 8'at a position corresponding to the claw-shaped projection 9 of the one terminal piece 8, and similarly the claw-shaped projection 9'is provided corresponding to the receiving hole 10. A pair of two terminal pieces 8 and 8'constituting a connection terminal 7 is formed so that the claw-shaped projections 9 and 9'and the receiving holes 10 and 10 'are engaged from both sides of the cable. It may be pressure-bonded.

It is also possible to arrange a plurality of terminal pieces on the same plane and to use them by connecting them in a ribbon shape.

[0017]

[Effect of the device]

 As described above, according to the connection terminal of the present invention, since the insulation of the undercarpet cable is pierced and a large number of small needle-shaped projections abutting the outer peripheral surface of the conductor are used for electrical connection, the connection reliability is improved. large. At the same time when these needle-like small projections are pierced, the claw-shaped projection is pushed through the insulator of the cable connecting part, and this is inserted and engaged in the receiving hole of the terminal piece on the opposite side. Therefore, the mechanical fixing of each terminal piece is made firm. Further, since the connection terminals can be continuously attached in one process, the work efficiency is significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a connection terminal for an undercarpet cable of the present invention and an example of its usage.

FIG. 2 is a perspective view showing a hollow rivet type connection terminal which is an example of a conventional connection terminal for an under carpet cable.

FIG. 3 is a perspective view showing a method for connecting an undercarpet cable using a conventional bent connection terminal.

[Explanation of symbols]

 1 ... Spear-shaped projection 2 Hollow rivet-shaped connection terminal 3 ... Small tooth-shaped projection 4 ... Bent-type connection terminal 5, 5 ', 12 ... Undercarpet cable 6 ... Hole 7 ... Connection terminal 8, 8 '... Terminal piece 9, 9' ... Claw-shaped protrusion 10, 10 '... Receiving hole 11, 11' ......... Small needle-shaped protrusion 13 ... Insulation Body 14: Conductor

Claims (1)

[Scope of utility model registration request] 1. A peripheral edge of a plate-shaped body made of a conductive metal,
A plurality of claw-shaped projections that are driven through the connecting part insulator of the undercarpet cable in the thickness direction and a receiving hole into which the claw-shaped projections that are driven from the opposite surface side are inserted are provided. And a plurality of needle-like small projections formed on the surface provided with the claw-shaped projections and abutted against the conductor by piercing the insulator of the undercarpet cable. Connection terminal for under carpet cable.