JPS5920253B2 - joint box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joint box that is used to protect the connection points between a plurality of electric wires that are routed along a building when these wires are interconnected.

In the conventional joint box, as shown in FIG. 6 and FIG.
one consisting of a cover 19f for covering f and a base If for fixing the cover 19f to the building 31f (
For example, Utility Model Publication No. 35-25367 or Utility Model Publication No. 4
2-18516), when connecting multiple electric wires to each other, it is necessary to simultaneously connect them while holding them together so that they do not come apart. However, there was a drawback that the work was extremely difficult.

Also, even in the connection complete state, for example, one electric wire 12f
When the wire is pulled in the direction of arrow If a bending force acts on the base of the exposed conductor 13f, the exposed conductor 13f may break, or both wires 1
There is a drawback in that a pulling force is applied to the bonded joint of the exposed conductors 13f and 13f of the wires 2f and 12f, causing one of them to be pulled out, resulting in a failure in which the connection between the two wires is severed. Therefore, the present invention has been developed to eliminate the above-mentioned drawbacks, and to provide a joint polyurethane wire that can easily and safely connect electric wires to each other, and also maintain a highly reliable connection state. It is something that we try to provide.

The drawings showing the embodiments of the present application will be described below.

In the base A, 1 is a base body, which is provided with a plurality of insertion holes 2 into which electric wires are inserted from the upper part, cut grooves 8 and 9 are provided at both sides and the lower end of the center, and at both ends of the t section of the device base 3 and at the lower end of the center. The central projecting ends are engaged and fixed so as not to move from side to side, and the device stand 3 is attached to the base body 1 by screws 15, 15 in the lower space. Further, the left and right notches 1811C and the left and right engaging parts 20 of the transparent cover 19 are fitted and fixed, and the mounting part 1a is fixed to the building with the screws 16. 2 is a large number of wire insertion holes arranged in parallel on the top surface of the base 1; 3 is a device stand for connecting the wire terminals; 4 is a current-carrying metal fitting that is fitted and fixed on both walls of the device stand 3, with one side exposed; 5 6 is a groove provided on both sides of the center of the device stand 3 into which the rear of the leaf springs 6, 6 are inserted and fixed, and 6 is a wire terminal (
When the exposed conductor (exposed conductor) 13 is pressed, it makes strong contact with the current-carrying metal fitting 4, and its tip strongly bites into the wire terminal to prevent the wire 12 from coming out. 7 is a leaf spring that prevents the inserted wire terminal from moving left or right. The partitions 8, 8 provided at both lower portions of the device stand 3 are grooves provided at the bottoms on both sides of the base body 1, and are formed so that the upper surfaces of both sides of the device stand 3 are engaged and fixed.

9 is a cut groove also provided at the lower center of the base 1,
The upper center edges of the two are engaged and fixed.

Reference numeral 11 denotes a pressing hole provided above the current-carrying metal fittings 4, 4 on both sides of the device stand 3, into which an arbitrary elongated rod cutter or the like is inserted and presses the leaf spring 6 to release the connection of the electric wire and enable replacement; 12 is an electric wire, 13 is an exposed conductor of the electric wire, and 14 is a terminal insertion hole 21 that is opened slightly diagonally toward both lower side walls of the mounting base 3, and in order for the electric wire terminal to be inserted, it must contact each inner wall surface and conduct electricity. Metal fittings 4,
The leaf spring 6 remains in permanent contact with the leaf spring 4 while being strongly pressed.
In order to maintain a stable connection even when the pressing force is weakened, the slanted wall 17 is provided with a notch in the shape of a . This increases the pressing force and secures the wire end 13 stably so that it does not move from side to side.
5ru.

In addition, the above-mentioned box not only allows a large number of connections to be made to the box, but also allows the slanted wall 14 to automatically adjust and exert a strong wire pressing force even when wires of various sizes are freely connected. 4 to ensure permanent energization.

In the embodiment shown in FIG. 5, reference numeral 10 is located inside the tip of the obliquely bent rear end of the leaf spring 6 to assist the pressing force of the wire end 13 and to provide long-term pressing. This is a reinforcing leaf spring that doubles pressure sustainability.

Furthermore, as shown in Figure 5, the insertion hole 2 has the same diameter as the electric wire.
The electric wire terminal 13 is inserted vertically one line at a time and pressed by the plate spring 6 whose pressing force and durability are doubled by the reinforcing plate spring 10.
is in strong contact with the current-carrying fitting 4 and is further forcibly pressed against the slanted wall 14 to complete the connection.Moreover, even if the external wire is moved, the wire terminal located inside this connecting device 13 is fixed and safe. To further explain the above configuration based on the drawings, the joint box consists of a base A and a cover 19, and the base A has its lower surface facing the building B as shown in FIG. The cover 19 has an attachment part 1a for attaching to a building so that it can be attached to a building in a state in which The above-mentioned cover is arranged above the base so that a space 23 large enough to hold the lifting portion 12a of the connecting wire 12 to be located above the base can be formed above the base A. The upper surface A/ and the inner surface of the cover ceiling part 19a are mounted on the base in a covered state with a sufficient distance between them.

Furthermore, there is a through space 24 large enough to allow the electric wire 12 to pass through between the bottom portion 19c of the peripheral wall portion 19b of the cover 19 and the base. Further, as shown in FIG. 2, the base is provided with a plurality of wire insertion holes 2 into which the wires 12 can be inserted from the top to the bottom. , a connecting fitting 4 and a plate spring 6 are provided to enable connection of the conductor 13 formed by exposing the tip of each electric wire 12, and furthermore, these connecting fittings are connected to each other. There is. On the other hand, as shown in FIG. 2, the position of the skirt portion 19c of the peripheral wall portion 19b of the cover 19 is determined in such a manner that the base portions 12c of the wires inserted into the wire insertion holes 2 are pulled out to the outside. , its base side 1
2c is positioned on the side of the base A so that it can be bent in a direction different from the insertion direction C of the inserted part and pulled out. As described above, since the present invention includes the cover 19 that is fixed to the base Al/C fixed to the building, the connection points of the plurality of electric wires 12 and the connection points thereof are The floating portion of the electric wire heading toward the building B is protected in the same way as in the conventional example shown in FIG. 6, thereby providing safety by preventing the danger of other objects hitting the floating portion.

Furthermore, in the present invention, the plurality of insertion holes 2 provided in the base A
Since each of the wires is provided with a connecting fitting in the deep part thereof, when connecting the plurality of electric wires 12, the plurality of electric wires 12 can be connected instantly and quickly by simply inserting the plurality of electric wires 12 into the plurality of insertion holes 2 respectively. There are effects that can be achieved.

Furthermore, when making connections, the insertion holes 2 are equipped with a number of holes into which one electric wire can be inserted, so when connecting multiple live wires, it is necessary to insert them one by one. They can be connected individually and have the effect of allowing the work to be carried out safely.

Furthermore, when the connection is completed, the insertion hole 2 allows the electric wire 12 to be inserted, so it is as if the insertion hole 2 into which the exposed conductor 13 is inserted at the back (lower side) is inserted into the electric wire 12.
The above cover 1
9, the exposed conductor 13 is doubly insulated,
This has the effect of making safety even higher.

Furthermore, in the above-mentioned connection completion state, since a plurality of electric wires are individually fixed to the base A fixed to the building, any of the electric wires is not subject to the above-mentioned tensile force. Even in the event of an electrical shock, other conductive wires can be kept unaffected, and disconnection of these other conductive wires can be prevented, resulting in the effect of maintaining high connection reliability.

Moreover, in the present invention, the hem portion 19c of the peripheral wall portion of the cover
is provided on the side of the base A so that the direction in which the wire is pulled out is in a direction different from the direction in which it is inserted, so even if the above-mentioned tensile force is applied to the wire, the tensile force is transferred to the insertion hole 2 marked E. It has the feature that the direction is transverse to the direction of .

This means that even if the exposed conductor 13 is instantly and quickly connected to the connection fitting by simply inserting the tip of the wire into the insertion hole 2 as described above, (1) the exposed conductor 13 of the wire This has the effect of preventing a large pulling force from being exerted on the conductor 13, preventing disconnection with the connecting fittings, and maintaining a highly reliable connection state. This has the effect of preventing bending force from being applied to the exposed portion (where the wire is damaged), thereby preventing breakage from occurring even if the exposed end has blade marks from the end treatment of the wire.

[Brief explanation of the drawing]

The drawings show embodiments of the present application, and Fig. 1 is a longitudinal cross-sectional view showing the main parts of the present application (A-A cross-sectional view in Fig. 4). Fig. 2 is a longitudinal cross-sectional view showing the connection state of the electric wire terminals ( (B-B sectional view in Fig. 4), Fig. 3 is a sectional view showing the inner surface of the side wall of the connection device stand,
The figure is a plan view of the base, FIG. 5 is a sectional view of a main part of a different connection device, FIG. 6 is a longitudinal sectional view showing a conventional example, and FIG. 7 is an exploded perspective view of the same.

Claims (1)

[Claims] 1 Consisting of a base and a cover, the base has a mounting part for mounting on a structure so that it can be mounted with its lower surface facing the structure, while the cover has a ceiling part and a cover connected to the ceiling. The cover is arranged above the base so that a space large enough to accommodate the raised portion of the connecting wire to be located above the base can be formed above the base. The cover is attached to the base with sufficient distance between the top surface of the table and the inner surface of the cover ceiling, and there is enough space between the hem of the peripheral wall of the cover and the base to allow the electric wire to pass through. In the joint box having a through space of a large size, the upper surface of the base is provided with a plurality of wire insertion holes into which wires can be inserted from the top to the bottom. A connecting fitting is provided at the bottom so that when the tip of each wire is inserted into the insertion hole, the exposed conductor at the tip of the wire is connected.
In addition, those connecting fittings are electrically connected to each other, and the hem of the peripheral wall of the cover is located on the base side of each wire whose tip is inserted into the wire insertion hole. When pulling out to the outside, the base side is bent to a position lower than the top surface of the base so that it can be pulled out, so that it is positioned lower than the top surface of the base and on the side of the base. Features a joint box.