JPS6329389B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat cable direct-attached outlet device which is directly attached to a flat cable such as a power cable and is used for plugging and connecting a plug provided at the cord terminal of an indoor electric appliance.

In recent years, a so-called carpet underlay wiring system has been proposed as a wiring method using the floor surface, in which a sufficiently thin flat cable is routed under the carpet laid on the floor surface. This system requires a dedicated outlet device to distribute electrical energy from the flat cable to the electrical appliances in the room. Conventionally, this outlet device was attached directly to the flat cable. What you get is being developed.

Such an outlet device includes a support pedestal that receives the flat lower surface of the flat cable, an outlet case that is attached to the other flat upper surface of the flat cable opposite to the support pedestal, and an outlet that is built into the outlet case. and a terminal conductor having one end exposed on the cable attachment surface side of the case and having a plurality of stabbing blades protruding from the exposed part, and a terminal conductor that passes through the outlet case and is screwed into the support frame, and the flat cable. and a screw that tightens the stabbing blade part of the terminal conductor in the case so as to pierce the insulation coating of the cable and press-connect it to the flat surface of the flat conductor, and simply by tightening the screw, the terminal conductor can be connected to the cable of the device. and the connection between the terminal conductor of the device and the flat conductor of the flat cable.
It is intended to be achieved at the same time.

This type of device is easy to handle and can be installed at any position on the flat cable laid at the cable installation site to correspond to the handling area for indoor electrical appliances, so it is easy for amateur workers to install it. But it's easy to handle.

However, when handled by an amateur worker, the degree of tightening of the screw is rarely constant, and often results in over-tightening or insufficient tightening force. If the tightening force is not constant as described above, electrical continuity at the press-contact connection between the terminal conductor of the outlet device and the flat conductor of the flat cable will not be stable, leading to poor contact.

In the past, considering this point, it was considered to use a special tool (torque wrench, etc.) to tighten the screws, but since all of these methods rely on local workers to do the tightening work, there is a risk of using the torque wrench incorrectly. There is a high possibility that over-tightening or under-tightening as described above may occur, resulting in a lack of reliability, and since no tightening history is left, there is also the possibility of forgetting to tighten.

On the other hand, apart from such a device, a device has been proposed for connecting a connector to a flat cable without peeling off its coating. This applies to flat cables made of round conductor wires with a circular cross section, where the two-stage needle of the connector is inserted through the insulation coating to clamp the conductor, as described above. It cannot be used in the outlet device that uses a flat conductor and is connected in a pressure-contact manner, and since such a connection device is complex and large and includes a hydraulic device, it is difficult to install it. It was unsuitable for local connection, and in this sense it could not be adopted.

The present invention has been made in consideration of these conventional circumstances, and is designed to be able to be handled by an amateur worker at the installation site, by tightening the flat cable and thereby connecting it to the flat conductor. In outlet devices that achieve pressure welding connections of terminals to flat conductors, it is possible to reliably achieve pressure welding connections of terminals to flat conductors with constant tightening force without the need for special, large-scale tools or equipment. The purpose is to provide a cable-directly attached outlet device.

That is, the outlet device according to the present invention connects a supporting frame that is attached to both flat surfaces of a flat cable and clamps the cable, and a pressure welding connection to the flat conductor of the cable by penetrating the insulation coating thereon. The screw that bridges and tightens the terminal and the attached outlet case consists of a constant torque tightening element that determines its tightening force by its own shear failure, and Accordingly, the terminal is constructed so as to achieve press-contact connection to the flat surface of the flat conductor.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the accompanying drawings.

In the figure, 10 is a flat cable, 20 is an outlet main body, 30 is a support frame, and 40 is a screw.

The flat cable 10 is made by arranging three flat conductors 11, 12, and 13 made of copper strips in parallel at intervals, applying plastic films to each from both sides, and fusing them together.
The conductor 11 and 13 on both sides are used as, for example, each phase conductor of a single-phase alternating current, and the central conductor 12 is used as a ground conductor.

On the other hand, the outlet main body 20 has a casing 21 that forms an outer cover, and terminal conductors 22, 23, and 24 made of copper plates that are incorporated into the casing 21. The casing 21 has up to two 3
It has curved plug insertion parts 21a, 21a, has positioning protrusions 21b, 21b on the lower surface, and further has holes 21c, 21c, for passing a screw vertically between the plug insertion parts 21a, 21a and on both outer sides.
21c. and terminal conductor 22,2
3 and 24 are each conductor 1 of the flat cable 10.
Corresponding to 1, 12, and 13, 22 and 24 serve as terminals for each phase, and 23 serves as a grounding terminal.

Each of the terminal conductors 22, 23, 24 is formed by bending and forming a copper plate into the plug insertion portion 21.
a, 21a, the plug insertion portions 21a, 21a form a contact end in the shape of a stopper receptacle, and the other end is led out from inside the casing 21 to the lower surface of the casing 21, Connection ends 22a, 23a, 24a corresponding to each flat conductor 11, 12, 13 are formed.

These connecting ends 22a, 23a, 24a are
A large number of piercing blades 22b extend along the lower surface of the casing 211, and a large number of piercing blades 22b are provided on the exposed surface thereof.
3b..., 24b... are formed in a protruding manner. Each piercing blade 22b, 23b, 24b is
It is formed by an upright piece obtained by cutting and raising the surface of a copper plate, and is made to protrude slightly larger than the lower surface of the casing 21, and its protrusion is shaped like a triangular pyramid, with its apex acting as a pressure contact. It is the tip of the.

On the other hand, the main frame 31 of the support frame 30 is formed of a sturdy plate material such as a steel plate, and an insulating sheet 31a is adhered to the side on which the flat cable 10 is placed. The frame 31 has holes 32, 32 through which screws for installation into the floor can be inserted at both ends thereof, and up to three screw holes 33, 33, 32, 32, 32, 32, 32, 32, etc., for installing screws into the floor at both ends thereof.
33 and two positioning holes 34, 34 are bored.

Then, the casing 21 and the support frame 30
The screw 40, which is used for assembly and fastening, has a top part 41a that engages with a hand tool such as a screwdriver in the tightening head 41, and a side head part 41c of the end part of the screw rod 41b.
and a shear stress concentration section 41d that is connected between the top section 41a and the head section 41c.

The outlet device of the present invention having each part configured as described above is assembled to the flat cable 10 in the following manner. First, the support pedestal 30 is installed on the concrete floor surface on which the carpet will be laid, and the lower flat surface of the flat cable 10 is placed on the flat surface of the insulating sheet 31a, which is the upper surface of the support pedestal 30. The outlet main body 20 is placed on the upper flat surface of the flat cable 10, and the positioning protrusions 21b, 21b on the casing 21 of the outlet main body 20 are connected to the insulation coating 14 of the flat cable 10. It penetrates and fits into the positioning holes 34, 34 of the pedestal 30 to perform positioning.

At this time, the through holes 21c, 21 of the casing 21
c, 21c and the screw holes 33, 33, 3 of the frame 31
3 coincides with the connecting end 22 of the terminal conductor.
a, 23a, 24a are located directly above each flat conductor 11, 12, 13 in the flat cable 10.

Incidentally, it is preferable that a through hole is formed in advance in the flat conductor 12 and the insulation coating 14 above and below the flat conductor 12 between the screw hole 33 at the intermediate position and the hole 21c.

After the setting is completed as described above, the three screws 40, 40, 40 are passed through the through holes 21c, 21c, 21c of the casing 21 and into the screw holes 33, 33, 33 of the frame 31, and Tighten.

Such tightening is performed using the top portion 41a of the tightening head 41.
The tightening is performed by engaging and rotating a hand tool such as a screwdriver, and the tightening is continued until the shear stress concentration part 41d breaks, and the tightening is stopped due to the shear failure of the shear stress concentration part 41d. This allows you to confirm that the tightening work has been completed.

By tightening as described above, the connection ends 22a, 23a, 24a of each terminal conductor are tightened.
is pressed against the upper surface of the insulation coating 14 while facing each flat conductor 11, 12, 13, and the stabbing blade portions 22b, 23b, 24b at each end pierce the insulation coating 14 to , 13 is reached.

The piercing blade portions 22b, 23b, 24b reach the flat conductors 11, 12, 13 before the shear stress concentration portion 41d of the screw is broken, and it is possible to reach the flat conductor 11, 12, 13 before the shear stress concentration portion 41d of the screw is broken. By tightening the piercing blades 22b, 23b, 24b to the flat conductor 1.
1, 12, and 13 so as to press into the upper flat surfaces thereof.

With this configuration, the screw 40 can be tightened to a constant torque, and the blade of the terminal conductor can be pressed into contact with the flat surface of the flat conductor reliably and with a constant force. This ensures a press-contact connection between the terminal conductor in the outlet body and the flat conductor in the flat cable.

The piercing blades 22b, 23b, and 24b described in the above embodiments can be formed by cutting and bending or by integrally attaching a separately manufactured needle-like piece to the main part of the terminal conductor. In addition to the triangular pyramid shape, the shape can be variously modified, such as a bell shape.

Further, as for the screw 40 serving as a constant torque tightening element, it is easiest to adopt a narrow-necked shear stress concentration part type as in the above embodiment, but other than that, a top part 41a and a head part 41b are made separately, The screw shaft formed on the top part 41a is screwed into the screw hole formed in the head part 41b, and the fracture caused by the tightening of the screwed part is used. It is possible to integrate the parts by adhesion and utilize the destruction (peeling) caused by the tightening of the adhesive part.

As explained above, according to the present invention, the flat cable can be tightened and the pressure welded connection to the flat conductor can be achieved by making it possible to handle it by the hands of an amateur worker at the installation site. A flat cable direct-mounted outlet that can reliably connect the terminal to the flat conductor with a constant tightening force without the need for special and large-scale tools or equipment. The intended purpose of providing the device has been achieved and is highly profitable.

[Brief explanation of drawings]

The attached drawings show an embodiment of the flat cable direct-mounted outlet device of the present invention, and Fig. 1 shows the state where it is assembled to a flat cable. FIG. 2 is a bottom view, and FIG. 2 is a front view showing an example of a screw used in the device. In the figure, 10...Flat cable, 1
1, 12, 13... Flat conductor, 20... Outlet body, 21... Casing, 22, 23,
24...Terminal conductor, 22b, 23b, 24b...
Piercing blade part, 30... Support frame, 40... Screw, 41... Tightening head, 41d... Shear stress concentration part.

Claims (1)

[Claims] 1. A device that is directly attached and connected to a flat cable obtained by insulating a flat conductor, with a support frame that receives one flat side of the flat cable, and a support frame that faces the support frame that supports the flat cable. an outlet case that is applied to the other flat surface; and a terminal conductor that is built into the case and has one end exposed on the cable attachment side of the case and has a plurality of piercing blades protruding from the exposed part. , is screwed through the outlet case and into the support frame, and the flat cable is clamped and the piercing blade portion of the terminal conductor in the case is pierced through the insulation coating of the cable to be press-connected to the flat surface of the flat conductor. and a screw consisting of a constant torque tightening element that defines the tightening force by its own shear fracture, and the stabbing blade is 1. A flat cable direct-mounted outlet device, characterized in that the connection is achieved by pressure contact with a flat surface of a flat conductor.