JPS5843968B2 - joint box - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a joint box used to protect the connection points between a plurality of electric wires that are routed along a building when they are interconnected. .

In the conventional joint box, as shown in FIGS. 5 and 6, there is a connection point 36 between the electric wires 30f and 30f.
The cover 25f is used to cover the building 3.
A body consisting of a main body 1f for fixing to 3f (for example, Utility Model Publication No. 25367 or Utility Model Publication No. 25367)
- When connecting multiple electric wires to each other, the wires must be held together so that they do not deviate from each other, and at the same time, the wires must be connected to each other at the same time. However, the drawback was that it was extremely difficult to perform the task.

Also, even when the connection is complete, for example, one electric wire 30f
When the wire is pulled in the direction of arrow A bending force may act on the base of the exposed conductor 31f, causing the exposed conductor 31f to break, or both wires 31f may break.
0f, 30f exposed conductor 31f.

There is a drawback in that a pulling force is applied to the bonded joint of 31f, causing one of the wires to be pulled out, resulting in a failure in which the connection between both wires is severed.

Therefore, the present invention aims to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide a joint box in which electric wires can be easily and safely connected to each other, and the connected state can also be maintained with high reliability.

The embodiments of the present application will be described below with reference to the drawings. Reference numeral 1 denotes a box, which constitutes the main body.

2 and 3 are current-carrying metal fittings, which constitute a power supply and a sending circuit.

4, 4.4 is a current-carrying metal fitting, which constitutes a switch and a load circuit.

Reference numeral 5 designates a locking spring, whose tip presses the exposed conductor 31 of the electric wire 30 into contact with each current-carrying metal fitting, and locks the exposed conductor 31 once inserted so that it cannot be pulled out.

A plurality of electric wire insertion holes 32 are formed, and each hole is formed so that the electric wire 30 can be inserted in one hole as shown in FIG.

6,7,8,9,10,11,12゜13.14,15
, 16.17.1B, 19° and 20.21 are openings in the plurality of wire insertion holes 32 that are opened to the surface of the box 10, and for example, 6 and 7 are power supply circuits, and 8 are openings.
, 9 and 10, 11 are sending circuits, 12, 13, 14, 16, 18, 20 are load circuits, and 15, 19, 21 are openings for switch circuits.

The insertion holes 32 are provided so as to be visually divided into a plurality of groups, as the positions of the respective openings are clearly shown in FIG.

Reference numeral 22 denotes a cut groove into which protrusions 23 provided on both lower sides of the insulating cover 25 are fitted and fixed.

Numeral 24 denotes fixing holes, which are provided in attachment parts provided at the bottom of both sides of the box 10, and are used to fix the box 1 to an object such as a building 33 with screws or the like.

25 is an insulating cover, which is inserted into the cut groove 22 by pressing the upper part of the protrusion 23 from both sides after connecting the wires to the box 1.
It is integrally formed with the base, and covers the entire area except the bottom, providing complete insulation.

Reference numeral 26 denotes a marker groove, which is a mark groove that is kept constant when viewed along with the exposed conductor of the electric wire 30 in order to ensure that the exposed conductor 31 of the electric wire 30 is inserted deep into the insertion hole 28 so that the length of the exposed conductor 31 is short and the connection is not incomplete. It is designed to be trimmed to the same length.

Reference numeral 2T denotes a support section, which forces the removed portion of the outer sheath to face upward along this slope so that the core wire from which the outer sheath covering the core wire is removed does not come into contact with other wires.

Reference numeral 28 denotes an insertion hole which guides the exposed conductor 31 inserted from the opening through the insertion hole 32 and supports each end individually.

Reference numeral 29 denotes a slanted wall, which the inserted exposed conductor 31 comes into contact with and is pressed against the current-carrying metal fitting to ensure the connection and to prevent the tip from moving even if the upper part of the wire is moved.

Reference numeral 30 denotes an electric wire, and 31 denotes an exposed conductor at the tip of the electric wire 30. The tip coating is cut off along the marking groove 26 and the electric wire 30 is inserted deep into the insertion hole 28.

To further explain the above structure in relation to the drawings, as shown in FIG.
Reference numeral 5 designates the upper surface of the main body and the inner surface of the cover ceiling portion 25a so that a space 34 large enough to accommodate the lifting portion 30a of the connecting wire to be located above the main body 1 can be formed above the main body. It is attached to the main body 1 in a covered state with a sufficient distance from the main body 1.

Moreover, the hem 25C of the peripheral wall 25b of the cover 25 and the main body 1
There is a through space large enough for the electric wire to pass through between the two.

Further, below each wire insertion hole in the main body 1, connection fittings consisting of current-carrying metal fittings 2, 3, and 4 and a locking spring 5 are provided, respectively.
3.4, the plurality of groups are electrically connected to each other.

Furthermore, a hem portion 25c of the peripheral wall portion 25b of the cover 25
As shown in FIG. 4, when the base sides 30b of the electric wires 30 inserted into the wire insertion holes are pulled out, the base sides 30b of the electric wires 30 are inserted. It is placed on the side of the main body so that it can be bent and pulled out in a direction B opposite to the insertion direction A of the part.

Note that the method of installing the current-carrying metal fittings in parallel inside the box 1 is not limited to two rows as shown in the drawings, but may be assembled in any shape according to the conditions of use, and of course each opening provided on the surface The parts can also be arranged in three rows, four squares, or any other arbitrary shape in accordance with the current-carrying metal fittings.

Furthermore, the method of attaching the box 1 to the connection point is not limited to the method shown in the drawings, but it is also possible to attach adhesive or the like to the entire or part of the bottom of the box 1 using any method. It is.

Furthermore, the shape of each current-carrying metal fitting is not limited to the round bar shown in the figure, but any irregularly shaped metal fitting can be used.

As described above, in the present invention, connection fittings are provided below the plurality of wire insertion holes 32 formed in the main body 1, and these connection fittings are electrically connected to each other in a plurality of groups. Therefore, when performing electric wire connection work, it is possible to freely connect multiple groups, that is, relay and distribute power supplies, and relay separate circuits such as switch circuits and lighting circuits as necessary.

Furthermore, in the case of connection work for each group, the insertion holes 32 are visually divided into groups, so the groups can be clearly identified, making the connection work for each group efficient and with fewer mistakes. There are effects that can be achieved.

Furthermore, when connecting each of the above-mentioned electric wires, each of the above-mentioned insertion holes 32 is designed to insert one wire of each size, so that each of the above-mentioned electric wires can be connected individually one by one, and the above-mentioned electric wires can be connected individually. Even if some of the wires are live wires, the connection work can be carried out safely.

Furthermore, since the present invention includes a cover 25 that is fixed to the main body 1, the connection point of the plurality of electric wires 30 connected as described above and the structure 33 of the electric wires toward the connection point can be removed. The floating portion 30a of the duck is protected in the same manner as in the conventional example shown in FIG. 5, thereby providing safety by preventing the danger of other objects hitting the floating portion 30a.

Furthermore, in the connection completion state, the electric wires 30 can be inserted into each of the insertion holes 32 one-to-one times, so it is as if the insertion holes 3 into which the exposed conductor 31 is inserted at the back (lower side)
2 can be covered with an electric wire 30,
Coupled with the existence of the cover 25, the exposed conductor 31 is
It has the effect of providing heavy insulation and further increasing safety.

Furthermore, in the above-mentioned connection completion state, since a plurality of electric wires are individually fixed to the main body 1 fixed to the building, even if a tensile force is applied to any of the electric wires, Other electric wires can be kept unaffected, preventing disconnection of these other electric wires, and maintaining high connection reliability.

Moreover, in the present invention, the hem portion 25c of the cover-0 peripheral wall portion
is provided on the side of the main body 1 so that the pull-out direction B of the electric wire 30 is in a direction different from the insertion direction A, so that even in the electric wire to which the above-mentioned tensile force is applied, the tensile force is transferred to the above-mentioned insertion hole 32. It has the feature that the direction is transverse to the direction of .

This has the effect of (1) preventing a large pulling force from being applied to the exposed conductor 31 of the electric wire, preventing disconnection from the connecting fitting, and maintaining a highly reliable connection state; (2)
In addition, the bending force is prevented from being applied to the exposed base part of the exposed conductor 31 that is most likely to break (the part that is generally damaged by a knife).
Even if there are blade marks from the end treatment of the wire at the exposed end, it is effective in preventing breakage from there.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a longitudinal sectional view (
(A-A sectional view in Figure 2), Figure 2 is a plan view of the main body, Figure 3 is a plan view of the main body,
The figure is a horizontal sectional view of the main body, Fig. 4 is a longitudinal sectional view showing the connection state of the wire terminal (BB sectional view in Fig. 2), Fig. 5 is a longitudinal sectional view showing the conventional example, and Fig. 6 is an exploded view of the same. Slope view. 1...Main body, 32...Wire insertion hole, 2
5...Cover, 30...Electric wire, 31.
...Exposed conductor.

Claims (1)

[Claims] 1 Consisting of a main body and a cover, the main body has a mounting part for mounting on a structure so that it can be mounted with its lower surface facing a structure, while the cover has a ceiling part and a mounting part connected to the ceiling part. and a peripheral wall portion, and the cover is arranged so that the upper surface of the main body and the cover can be formed above the main body to form a space large enough to accommodate the lifting portion of the connecting wire that is to be positioned above the main body. The cover is attached to the main body with a sufficient distance from the inner surface of the ceiling, and there is a through space between the bottom of the peripheral wall of the cover and the main body that is large enough to allow the electric wire to pass through. In the joint box, the main body has a plurality of wire insertion holes drilled from the top to the bottom into which one wire can be inserted, and the wire insertion holes are divided into a plurality of groups. They are visually divided, and below each insertion hole there are connecting fittings that enable connection of the conductor formed by exposing the tip of each electric wire, and these connecting fittings are The plurality of groups are electrically connected to each other, and the hem of the peripheral wall of the cover is located at a position where the base sides of the electric wires inserted into the wire insertion holes are pulled out to the outside. , a joint box characterized in that its base side is bent in a direction different from the insertion direction of the inserted part and positioned on the side of the main body so that it can be pulled out.