JPH06104029A - Protective box of electric wire connection part - Google Patents

Abstract

PURPOSE:To fill a filler sufficiently into a space between branch wires, and to improve sealing property and workability by providing electric wire inserting holes, a space for the filler, a frame made of elastic material, and a middle to high part on which the electric wire is put, which crosses the electric wire, on both ends inside in a half-cut shape. CONSTITUTION:A filler for sealing is filled in recessed parts 20A, 20B of frame members 12A, 12B made of elastic material, which are provided between protruded parts 17A and 17B of box half members 11A, 11B forming a box main body 10. An electric wire connection part is provided on the recessed part 20A, and each electric wire is fitted in rubber caps 13A, 13B on semicircular notches 16A, 16B, while the wire is sandwiched between flat as well as middle to high shape electric wire putting parts 18A, 18B as well as 19A and 19B of the frame members 12A, 12B. Since the members 11A, 11B are fitted together to carry out locking, the filler is sufficiently filled in between the respective wires by the pressure of the members 12A, 12B. The sealing property can be improved without pressing by a press, and the work can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective box for electric wire connection.

[0002]

2. Description of the Related Art There are various methods for protecting an electric wire connecting portion. Among them, as shown in FIG. 9, a protective sheet 1 made of a fluid insulating material having self-bonding property such as butyl rubber is used. Is folded in two and sandwiches the wire connecting portion 2 or is wound around the wire connecting portion 2 to cover the wire connecting portion 2 from the outside as shown in FIG. 10 (a) (Japanese Patent Laid-Open No. 1-206573). Etc.).

By the way, when the branch connection portion of the electric wire is covered, the insulating material 1A is not easily filled naturally in the gap H between the electric wires W as shown in the cross section of FIG. It is difficult to ensure waterproof performance. For this reason,
As shown in FIG. 11, the insulating material 1A was forcibly filled with the insulating material 1A by pressing with the presses 3 and 3.

[0004]

As described above, conventionally, it is necessary to perform pressing by a press in order to satisfactorily fill a space between branch lines with a fluid insulating material such as butyl rubber.
The work was troublesome.

Therefore, an object of the present invention is to provide an electric wire connection part protection box which can improve the filling performance between branch lines and improve the waterproof performance without pressing by a press. .

[0006]

The electric wire connection part protection box of the present invention comprises a pair of box half members having a split shape, and when both box half members are combined, a space is formed inside and electric wires are provided at both ends. And a pair of frame members made of an elastic material, each of which is internally provided in each of the box half members and which forms a filling space for a sealing filler inside when the box half members are combined. The frame member is characterized in that an electric wire contact portion having a middle-height shape (a shape with a high center and a low circumference) is formed in a direction intersecting the insertion direction of the electric wire.

[0007]

When the protective box having the above-mentioned structure is used, butyl rubber or the like is placed in the filling space previously formed between the frame members before the box half members are fitted together so that the electric wire connecting portion is sandwiched between the frame members. Fill a large amount of the filling material of. Then, the box half members are aligned with each other while sandwiching the wire connecting portion between the frame members, and are joined to each other. Then, at the time of the connection, the branch line hits the middle-and-high-shaped electric wire contact portion, whereby the component force in the direction intersecting with the branch line acts on each branch line, and the distance between the branch lines becomes large. It is expanded so that the filling material can sufficiently enter between the branch lines.

Further, the frame member made of an elastic material is deformed by hitting the electric wire, thereby generating a compressive force in the direction of pushing out the filling material, and the compressive force acts between the electric wire connecting portion and the branch line. The filling material will come in sufficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state before the protection box 10 of the embodiment is attached to a wire connecting portion. The protection box 10 is composed of a lower box 10A and an upper box 10B which are split in half.

Lower box 10A and upper box 10
B is a half half box member 11A, 11B made of a hard resin, which constitutes the box main body 11 that becomes an outer shell when combined, and each half box member 11A, 11B.
Frame members 12A, 12B made of elastic material loaded in B,
When combined, the rubber plugs 13A and 13B each have a split shape that tightly fits the outer circumference of the wire and seals the gap.

The structure of the lower box 10A is shown in FIG. 4, and the structure of the upper box 10B is shown in FIG.

Lower box 10A, upper box 10B
In the box half members 11A and 11B that form the outer shells of the above, the recesses 15A that form a space when both are combined,
15B and a semicircular cutout 16 for forming wire insertion holes at both ends 16
A and 16B are provided respectively. Recess 15A,
Projections 17A and 17B for positioning the frame members 12A and 12B are formed on the bottom surface of 15B.

Each frame member 12A, 12B has two stages of wire contact portions 18A, 19A, 18 at both ends in the wire insertion direction.
B and 19B. Outer wire contact portion 18A,
18B is formed flat, and the inner wire contact portions 19A, 1A
9B is a middle-height shape along a direction intersecting the insertion direction of the electric wire,
That is, the convex curved surface is formed so that the center is higher and the height is lower toward the peripheral portions (left and right ends). Instead of the convex curved surface, a triangular mountain shape or the like may be used. In addition, recesses 20A and 20B for forming a filling space of the filler when the lower box 10A and the upper box 10B are combined are formed between the inner wire contact portions 19A and 19A.

Further, on the outer surfaces of the lower box half member 11A and the upper box half member 11B, a locking claw 21 is provided on one side and a hook 22 is provided on the other side so that they can be locked to each other when they are fitted together. Has been formed. Further, a guide wall 23 is provided on the inner circumference of the peripheral wall of the lower box half member 11A so as to guide the fitting of the upper box half member 11B and prevent the filler from leaking.

As shown in FIGS. 1 to 3, the lower box half member 11A thus constructed has a recess 15A.
The frame member 12A is fitted to the
A rubber plug 13A is fitted to A, thereby forming a lower box 11A. In this case, the frame member 12A is arranged between the protrusions 17A, 17A on the bottom surface of the recess 15A, and spaces 25, 25 are secured on both sides of the frame member 12A in the wire insertion direction as shown in FIG.

Similarly, the upper box half member 11B includes:
As shown in FIG. 1, the frame member 12B is fitted in the recess 15B, and the rubber plugs 13B are fitted in the semicircular notches 16B at both ends, whereby the upper box 11B is constituted. Also in this case, the frame member 12B is arranged between the protrusions 17B, 17B on the bottom surface of the recess 15B, and the spaces 25, 25 are secured on both sides of the frame member 12B in the wire insertion direction.

Next, the procedure for mounting the protection box 10 on the wire connecting portion and the operation at the time of mounting will be described.

The protection box 10 is constructed in advance as shown in FIG. As shown in FIGS. 2 and 3, butyl rubber (filler) 30 is filled in the central recess 20A of the frame member 12A of the lower box 10A in this state. that time,
The height of the butyl rubber 30 is raised so as to be higher than the upper end position of the frame member 12A by an appropriate dimension. From this state, an electric wire connecting portion (not shown) is provided on the central concave portion 20A of the frame member 12A of the lower box 10A as shown in FIG.
0 is omitted), and each electric wire is fitted into the rubber plugs 13A at both ends in the insertion direction.

In this state, the upper box 10B is covered on the lower box 10A so that the frame members 12A and 12B and the box half members 11A and 11B are aligned with each other, and the lock claw 21 and the lock arm 22 are used. And are joined together to give the appearance shown in FIG.

Then, at the time of this connection, the flat wire contact portions 18A of the frame members 12A and 12B shown in FIG.
The main wire W and the branch wire W1 are pressed down by 18B, and at the same time, the wire contact portions 18 of both frame members 12A and 12B.
The frame members 12A, 1
The gap between 2B is sealed.

Also, the middle and high-shaped electric wire contact portions 19A, 19
When the branch line W1 hits B, a force in a direction intersecting with the wire insertion direction is applied to the branch line W1, and the action expands the interval between the branch lines W1. Therefore,
The butyl rubber 30 comes into the space between the branch lines W1 and the waterproof performance is improved.

Also, the frame members 12A, 12B made of an elastic material are deformed by hitting the main electric wire W and the branch line W1, thereby generating a compressive force in the direction of pushing out the butyl rubber 30, and the action by the compressive force. As a result, the butyl rubber 30 sufficiently enters between the wire connecting portion 2 and the branch line W1.

Further, the rubber plugs 13A, 13B are the main wires W,
The close contact with the outer periphery of the branch line W1 ensures the waterproofness of this portion.

From the above, the waterproof performance is improved and the quality of the protective structure of the electric wire connecting portion is stabilized. Further, since the sealing property between the branch lines can be particularly improved without pressing by the press, the work becomes easy.

[0026]

As described above, according to the present invention,
Since it has a middle-and-high-shaped electric wire contact portion, and the distance between the branch lines can be widened by this electric wire contact portion, the filler can be made to sufficiently enter between the branch lines. Also,
Since the compressive force can be applied to the filling material by the repulsive force of the elastic material frame member caused by hitting the electric wire, the filling material can be sufficiently inserted between the branch lines without pressing by the press. Therefore, it is possible to simultaneously improve the sealing performance and facilitate the work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a lower box 10A according to an embodiment of the present invention.
FIG.

FIG. 5 is an upper box 10B according to an embodiment of the present invention.
FIG.

FIG. 6 is a perspective view for explaining the operation of the embodiment of the present invention.

FIG. 7 is an external view of an assembled state of an example of the present invention.

FIG. 8 is an external view of another embodiment of the present invention in an assembled state.

FIG. 9 is a perspective view used for explaining a conventional method of protecting an electric wire connecting portion.

10A is an external side view showing a protected state of a conventional electric wire connecting portion, and FIG. 10B is a sectional view taken along line Xb-Xb in FIG. 10A.

FIG. 11 is a side cross-sectional view showing a state of a compression step work of a conventional electric wire connecting portion.

[Explanation of reference numerals] 10 Protective box 11 Box body 11A, 11B Box half member 12A, 12B Frame member 16A, 16B Semi-circular notch 19A, 19B forming a wire insertion hole Middle-high shape wire contact portion 20A, 20B Recesses to be formed 30 Butyl rubber (filler)

Claims (1)

[Claims] 1. A box main body which comprises a pair of box half members having a split shape, and which, when the box half members are joined together, forms a space therein and has wire insertion holes at both ends thereof. Each of the members is equipped with a pair of frame members made of an elastic material that are internally mounted and that form a filling space for the sealing filler inside when the two box half members are combined, and in the frame member, with respect to the insertion direction of the electric wire. An electric wire connection portion protection box having a middle-high shape electric wire contact portion formed in the intersecting direction.