JPH0433662Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a terminal block connected to a flat cable.

[Background technology]

Recently, undercarpet systems have come into use as indoor wiring systems. The feature of this system is that the flat cables are pasted directly on the floor and then a carpet is laid to cover the cables, making it possible to freely change the cable wiring without having to do any floor work. The purpose is to do so. Floor receptacles used in this system must be easy to install and remove at any location on the cable. 2. Description of the Related Art Conventionally used floor outlets include those having a terminal block containing a built-in connector electrically connected to a flat cable.

Next, the conventional terminal block and undercarpet system will be explained in more detail with reference to FIGS. 3 and 4. The undercarpet system is
As shown in the figure, normally a bottom protection sheet 1 is laid at the bottom. On top of that, flat cable 2,
Lay the conductive sheet (top protection sheet) 3 in order,
Lay the carpet on top. The flat cable 2 is
A predetermined number of flat conductors 2a are covered with an insulating cover 2b. The conductive sheet 3 is provided to prevent electric shock accidents and is grounded. Terminal block 4
The top and side surfaces of a horizontally long base 5 made of an insulating material such as resin are covered with a cover 6 having an L-shaped cross section and also made of an insulating material such as resin. A connector 7 having a U-shaped cross section is fitted into the base body 5 from the inner side surface. A terminal screw 8 is provided on the upper piece of the connector 7. The head of this terminal screw 8 is the cover 6
It is exposed to the outside through a hole 6a provided in the horizontal piece. A protrusion 7a is provided on the lower surface of the lower piece of the connector 7, and this protrusion 7a protrudes from the bottom surface of the terminal block 4.

The terminal block 4 is arranged on the flat cable 2 in the following manner. A metal base 9 is inserted into the back side of the flat cable 2, and the terminal block 4 is placed on the flat cable 2 so that the protrusion 7a is located on the conductor 2a. Next, fixing screws 10 are inserted into screw insertion holes 4a provided vertically through the terminal block 4.
and insert the tip of the screw 10 into the screw hole 9 of the base 9.
Screw into a. When the screw 10 is strongly tightened, the protrusion 7a of the connector breaks the insulating cover 2b and the conductor 2a
At this time, the connector 7 and the conductor 2a are electrically connected. One end of a cord 11 is connected to the upper piece of the connector 7 by a terminal screw 8, and the other end of the cord 11 is connected to a blade holder of an outlet or the like. Terminal block 4
can be easily removed by removing the screw 10.

The conventional terminal block has the following problems. That is, it is necessary to strongly tighten the fixing screw in order to break the insulating cover and make the protrusion of the connector contact the conductor. In this case, the head of the screw strongly presses the vicinity of the screw insertion hole of the terminal block, and stress is concentrated on the screw portion. Therefore, as shown in FIG. 3, there is a problem that the terminal block 4 is often damaged, such as cracks 12 forming near the screw insertion holes. Furthermore, because of the electrical connection to the connector, the terminal block cannot be covered with a conductive sheet. Therefore, if the ends of the conductive sheet are placed on both sides of the terminal block, the conductive sheet 3 will be placed on the terminal block 4 as shown in FIGS. 3 and 4.
If the flat cable 2 is moved away from the terminal block, both sides of the terminal block of the flat cable 2 will no longer be covered with the conductive sheet.
There is a high risk of electric shock occurring on both sides of the terminal block.

[Purpose of invention]

This invention was made in view of such circumstances, and aims to provide a terminal block that is less likely to be damaged and can improve electrical safety.

[Disclosure of invention]

In order to achieve the above objectives, this invention
A connector with a protrusion protruding from the bottom that can be applied to the conductor by tearing through the insulating cover of the flat cable holds the flat cable between it and a base placed on the back side of the flat cable with the protrusion facing the flat cable. , a terminal block fixed to a base with screws, the upper surface of which is covered with a plate made of a hard and unbreakable material, and when the fixing screws are tightened;
A plate is adapted to be placed under the head of the screw, and the plate is provided with a presser on the side for holding down the sheet placed on the flat cable so that it does not shift. Its gist is the terminal block. This idea will be explained in detail below.

As shown in FIGS. 1 and 2, the terminal block 13 according to this invention has a horizontally long base 14 made of an insulating material such as resin, and the top and side surfaces thereof are also made of an insulating material such as resin with a cross section L. It is covered with a letter-shaped cover 15. A predetermined number of connectors 16 each having an L-shaped cross section are attached to the upper surface and inner side surface of the base body 14 . A terminal screw 8 is inserted into a screw hole provided in a horizontal piece of the connector 16. At the lower end of the vertical piece of the connector 16 is a protrusion 1 with a sharp tip.
A predetermined number of protrusions 6a are provided, and these protrusions 16a protrude from the bottom surface of the terminal block 13. A metal plate 17 is placed on the top surface of the cover 15. Both sides of the metal plate 17 in the width direction are bent downward at the sides of the cover 15 to serve as pressers 17a for pressing the conductive sheet 3, and the metal plate 17 as a whole has a U-shaped cross section. The lower end of the presser foot 17a is bent laterally. A predetermined number of holes 17b for exposing the heads of the terminal screws 8 and holes 17c for inserting the fixing screws 10 are formed in the intermediate piece of the metal plate 17. terminal screw 8
The head is located in the hole 15a provided in the horizontal piece of the cover 15.
and is exposed to the outside from the hole 17b of the metal piece. The cover 15 and the base body 14 are provided with a predetermined number of holes 13a for inserting the fixing screws 10 that pass through the cover 15 and the base body 14 in the vertical direction, and the holes 13a and the holes 17c are connected to each other.

This terminal block 13 is arranged on the flat cable in the following manner, for example. As in the conventional case, the bottom protective sheet 1 is placed at the bottom, and the flat cable 2 and conductive sheet 3 are placed on top of it in this order. The conductive sheet 3 is not applied to the terminal block 13 installation position, and the metal base 9 is inserted into the back side of the flat cable 2 at that position. Then, the terminal block 13 is placed on the flat cable 2 so that the protrusion 16a is located on the conductor 2a. The ends of the conductive sheets 3 placed on both sides of the terminal block 13 are placed under the presser foot 17a. Next, the screw 10 is inserted into the screw insertion holes 17c and 13a, and the tip of the screw 10 is screwed into the screw hole 9a of the base 9. When the screw 10 is strongly tightened, the protrusion 16a of the connector breaks through the insulating cover 2b and hits the conductor 2a, so that the connector 16 and the conductor 2a are electrically connected. Then, the metal plate presser 17a presses the end of the conductive sheet 3. Since the metal plate 17 is placed on the lower surface of the head of the screw 10, even if the screw 10 is strongly tightened, the force applied to the cover 15 and the base body 14 is dispersed over the entire body. Therefore, the risk of damage to the cover 15 and the base 14 is greatly reduced, and since the ends of the conductive sheet 3 are held down by the pressers 17a, the risk of shifting away from the terminal block 13 is reduced. Therefore, the risk of electric shock occurring on both sides of the terminal block is reduced, and safety is extremely high.

As in the conventional case, one end of the cord 11 is connected to the horizontal piece of the connector 16 by the terminal screw 8, and the other end of the cord 11 is connected to the blade holder of an outlet or the like.

In the above embodiment, pressers are provided on both sides of the metal plate in the width direction, but the installation position and number can be changed as long as the ends of the conductive sheets placed on both sides of the terminal block can be held down. Not particularly limited. Further, in the above embodiment, a connector having an L-shaped cross section is provided, but a connector having a U-shaped cross section or the like may be provided. Instead of the metal plate, a plate made of another hard and unbreakable material may be used. The terminal block according to this invention is not limited to use in electrical outlets.

[Effect of idea]

In the terminal block according to this invention, the connector has a protrusion protruding from the bottom surface that can be applied to the conductor by breaking the insulating cover of the flat cable, and the base is arranged on the back side of the flat cable with the protrusion facing the flat cable. The flat cable is sandwiched between the terminal blocks, and the terminal block is fixed to the base with screws, and the upper surface is covered with a plate made of a hard and unbreakable material, so that when the fixing screw is tightened, the head of the screw A plate is placed under the flat cable, and the plate has a presser foot on the side to hold the sheet placed on top of the flat cable so that it does not shift, so there is less risk of damage. Electrical safety can be improved.

[Brief explanation of the drawing]

Figure 1 is a perspective view of one embodiment of the terminal block according to this invention installed on a flat cable;
The figure is a longitudinal sectional view of the same state, Figure 3 is a perspective view of a conventional terminal block installed on a flat cable, and Figure 4 is a perspective view of a conventional terminal block installed on a flat cable.
The figure is a longitudinal sectional view of the same state. 2...Flat cable, 2a...Conductor, 2b...
Insulation cover, 9...Base, 13...Terminal block, 1
6... Connector, 16a... Protrusion, 17... Metal plate, 17a... Holder, 10... Fixing screw.

Claims (1)

[Scope of utility model registration request] A connector has a protrusion protruding from the bottom surface that can be applied to the conductor by tearing the insulating cover of the flat cable, and the flat cable is sandwiched between it and a base placed on the back side of the flat cable with the protrusion facing the flat cable. , a terminal block that is fixed to a base with screws, the upper surface of which is covered with a plate made of a hard and unbreakable material, and when the fixing screw is tightened, the plate is placed under the head of the screw. What is claimed is: 1. A terminal block characterized in that the plate body is provided with a presser on a side portion thereof to press down a sheet placed on a flat cable so that it does not shift.