JP2001057734A - Drip-proof type cable connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain drip-proof operation, even if a lid is not connected to a connection box body with a strong force which is of different structure for obtaining the drip-proof operation by crushing a gasket. SOLUTION: A rid 25 is provided at an outer periphery near the opening end of a connection body 22, a lid 23 is mounted to the lower part of the connection box body 22 via a hinge 26 so that it can be switched vertically, and an upper peripheral wall part 28' for covering at least the half of the depth of the upper portion of the connection box body 22 is provided at the lid 23, thus obtaining drip-proof operation, even without having to connect the lid 23 to the connection box body 22 with strong force, thus eliminating a structure for firmly fixing the lid 22 with a bolt, a buckle, or the like, and for example adopting simple gear-lock structure, such as for gear-locking the lid 22 to the side of the connection box body with a claw, and preventing the problem where the drip-proof operation cannot be secured due to carelessness such as forgetting to clamp the bolt or to buckle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip-proof cable connection box used for connecting an overhead cable such as an overhead power distribution cable.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional drip-proof cable connection box 1 for an overhead power distribution cable, in which a connection portion of a power distribution cable 10 is accommodated. The drip-proof cable connection box (hereinafter referred to as a cable connection box) 1 includes a connection box main body 2 having an opening 2a on a front surface (right side in the figure) and a lid 3 for closing the opening 2a. 2 is attached to a messenger wire 5 via an L-shaped hanging bracket 4 fixed to the back of the messenger wire 5. The hanging metal fitting 4 is fixed to the messenger wire 5 by sandwiching the messenger wire 5 between its L-shaped upper part and the clamp plate 6 and tightening it with a bolt 7. A gasket 8, which is a rubber product, is arranged around the opening 2a of the connection box main body 2. When fixing the lid 3 to the connection box main body 2 with bolts 9, the gasket 8 is strongly bolted so as to be crushed. Thus, the drip-proof action of the cable connection box 1 is obtained.

FIG. 7 shows another conventional cable connection box 11, in which a lid 13 of the cable connection box 11 is attached so as to be openable and closable up and down through a hinge 14 provided on the upper surface of a connection box body 12. When closed, the lower part is locked to the connection box main body 12 by the buckle 15, so that water and the like escape to the side surface to obtain the drip-proof action together with the drip-proof action of the gasket 8.

[0004]

The above-mentioned conventional cable connection boxes 1 and 11 are composed of fastening members such as bolts 9 and buckles 1.
Since the gasket 8, which is a rubber product, is strongly crushed by 5 or the like to obtain a drip-proof action, there is a possibility that an operator may forget to tighten the bolt 9 or hang the buckle 15 or the like, and the drip-proof action can be secured. There is a disadvantage that cannot always be said. In the case of the hinge 14 structure shown in FIG. 7, it is necessary to hold the lid 13 open as shown by the two-dot chain line when performing connection work or the like, and therefore, although not shown, A stopper is required to keep the lid 13 from closing,
The number of parts increases and the cost also increases. Further, there is also a problem that the lid 13 held in an open state restricts the work space, and the workability is not good. ,

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and can prevent the problem that the drip-proof function cannot be secured due to carelessness of an operator or the like. It is an object of the present invention to provide a drip-proof cable connection box which requires less cost, is inexpensive, and does not impair workability.

[0006]

According to the present invention, there is provided a drip-proof cable connection box having a connection box body having an opening on a front surface and a lid for closing the opening. A rib protruding from the outer peripheral surface near the opening edge of the connection box, the lid is attached to a lower part of the connection box body via a hinge so as to be openable and closable up and down, and the lid is a lid surface facing the opening. And a peripheral wall portion facing the outer periphery of the connection box body, wherein a portion of the peripheral wall portion above the cable insertion hole of the connection box body has a length of at least half the depth of the connection box body. Features.

A second aspect of the present invention provides a drip-proof type cable connection box according to the first aspect, wherein a top end of a peripheral wall portion of the lid in a depth direction has
When the lid is pushed in the depth direction, a claw is provided for engaging the engaging portion on the connection box main body side.

A third aspect of the present invention is a drip-proof cable connection box provided with a connection box main body having an opening on a front surface and a lid for closing the opening, wherein the outer peripheral surface is provided near an opening edge of the connection box main body. A lid protruding from the connection box main body, the lid is attached to a lower portion of the connection box main body via a hinge so as to be openable and closable up and down, and the lid has a lid surface portion facing the opening and a peripheral wall facing the outer periphery of the connection box main body. And a step formed on the inner surface of the peripheral wall portion, the rib, and a top surface portion to provide drip-proof.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. FIG. 1 is a front view of a drip-proof cable connection box 21 according to an embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a view of FIG. 2 with a cover opened, and FIG.
5 is a sectional view of FIG. 4A, and FIG. 5 is a perspective view of FIG. In these figures, a drip-proof cable connection box (hereinafter referred to as a cable connection box) 21 has an opening 22 on the front surface.
box body 22 having a and lid 2 for closing said opening 22a
3 and is attached to the messenger wire 5 via an L-shaped hanging bracket 4 fixed to the back surface of the connection box main body 22. The hanging metal fitting 4 is fixed to the messenger wire 5 by sandwiching the messenger wire 5 between its L-shaped upper part and the clamp plate 6 and tightening it with a bolt 7.

As shown in detail in FIGS. 4 and 5, a rib 25 protruding from the outer peripheral surface is formed on the outer periphery of the connection box body 22 near the edge of the opening 22a. In addition, the lid 23
It is attached to the lower part of the connection box main body 22 via a hinge 26 so that it can be opened and closed up and down. The lid 23 has a lid surface portion 27 facing the opening 22 a of the connection box main body 22 and the connection box main body 2.
2 and a peripheral wall portion 28 that covers both sides and the upper surface in the longitudinal direction of the connection box main body 22 so as to avoid the cable insertion hole 22b. As shown in FIG. The portion (upper peripheral wall) of the connection box main body 22 above the cable insertion hole 22b has a length substantially equal to the depth of the connection box main body 22 and substantially covers the upper portion of the connection box main body 22. That is, as shown in FIGS.
Upper peripheral wall 28 '(the top face portion 28a and the both sides of the upper side wall portion 28b of the top surface portion 28a of the peripheral wall portion 28) side wall depth length _{L 1} is lower than the cable insertion hole 22b of the 28e of
Depth length L ₂ sufficiently longer than a length that generally covers deep portion of the connection box body 22. The top surface (eave) 28 a of the upper peripheral wall 28 ′ of the lid 23 forms a narrow gap c (see FIG. 4) with the top surface 22 c of the connection box main body 22. The top surface 2 of the connection box body 22
2c is slightly inclined downward toward the back.
That is, the top surface portion 22c is not horizontal during suspension,
It is inclined downward. The rib 25 of the connection box body 22
As shown in detail in FIGS. 4 and 5, is located at a position slightly inward from the front end face of the connection box main body 22, and correspondingly, there is a slight gap between the lid 23 and the rib 25. To form an opposing step 23a. The gap is formed between the vertical surface 25a on the front side of the rib 25 and the opposing surface 23 of the step portion 23a.
b. On the upper side wall 28b of the peripheral wall 28 of the lid 23, an extension piece 28d having a claw 28c at the tip is formed separately by a slit, and is elastically deformable and deformable in the width direction of the lid. The nail 2 at the tip of the piece 28d
8c can be locked in the hole of the locking member 30 attached to the connection box main body 22 side.

In the cable connection box 21, when connecting the distribution cable 10, the cover 23 is opened as shown in FIG. 3, but since the hinge 26 is located below the connection box body 22, the cover 23 is closed. There is no need for a stopper or the like for holding the open state. Therefore, the number of parts is reduced and the cost is reduced. Further, as shown by the two-dot chain line in FIG. 7, the lower lid 23 is less hindered than in the case where the lid 13 is above, so that a work space is widened and workability is improved.

After the operation is completed, when closing the lid 23,
Is pivoted upward about the hinge 26, and then pushed into the connection box body 22, the claw 28c at the tip of the extension piece 28d of the lid 23 is locked in the hole of the locking member 30.
Lock to open. In this case, the extension piece 28d elastically bends and deforms inward in the width direction when the claw 28c passes through the hole, thereby allowing the claw 28c to pass through the hole. in this way,
When closing the lid 23, it is sufficient to simply push the lid 23 in, so that there is no problem that the drip-proof function does not work effectively due to carelessness such as forgetting to tighten a bolt or hanging a buckle. Drip action can be ensured.

The drip-proof action of the cable connection box 21 will be described. Water droplets transmitted along the outer peripheral surface of the connection box main body 22 are prevented from entering by the rib 25. In this case, the inclination of the top surface portion 22c of the connection box main body 22 is effective for discharging the attached water droplets and preventing the water droplets from entering along the top surface portion 22c. In addition, water droplets floating in the air particularly along the top surface portion 22c of the connection box main body 22 have a small gap c between the top surface portion 22c of the connection box main body 22 and the top surface portion 28a of the lid 23, and are not connected. Rib 25 on box body 22 side
Since the gap between the cover and the step 23a on the side of the lid 23 is further narrowed, it is possible to effectively prevent the intrusion of floating water droplets. In this case, since the upper peripheral wall portion 28 '(top surface portion 28a and upper side wall portion 28b) of the lid 23 is sufficiently long, the connection box main body 22
The flow of floating water droplets is unlikely to occur in the gap c between them, and the penetration of floating water droplets is more effectively prevented.

In the embodiment, the depth of the upper peripheral wall portion 28 'of the lid 23 is set to a length that generally covers the entire depth of the connection box main body 22, but it may be at least half or more. . Although the above embodiment is a connection box for an overhead power distribution cable, the invention is not necessarily limited to the power distribution cable, and can be applied as a connection box for an overhead cable such as an optical fiber cable. Furthermore, when the lid is closed, the rib 2
Instead of forming a gap between the cover 5 and the lid 23, the cover 5 may be tightly sealed.

[0015]

According to the present invention, a rib is provided on the outer periphery near the opening edge of the connection box body, and a lid is attached to the lower part of the connection box body via a hinge so as to be openable and closable up and down. Since the upper peripheral wall portion that covers at least one half of the depth of the upper portion is provided, various effects such as joining can be obtained. Unlike the structure in which the gasket is crushed to obtain a drip-proof action, the drip-proof action can be obtained without connecting the lid to the connection box body with a strong force. Therefore, it is not necessary to adopt a structure in which the lid is strongly fixed with bolts or buckles, etc., and a simple locking structure such as locking the lid to the connection box body side with a claw can be adopted. The problem that the drip-proof action is not secured due to carelessness such as forgetting can be prevented. Also,
The operation of closing the lid is simplified, and workability is improved. Since the hinge is located at the lower part of the connection box main body, a stopper or the like for keeping the lid open is not required, and therefore the number of parts is reduced and the cost is reduced. Since the open lid hangs downward, a work space is widened and workability is improved. The water droplets transmitted along the outer peripheral surface of the connection box main body can be prevented from entering by the ribs. Since the depth of the upper peripheral wall portion of the lid is sufficiently long, it is possible to effectively prevent the intrusion of water droplets floating in the air, particularly along the top surface of the connection box main body.

[Brief description of the drawings]

FIG. 1 is a front view of a drip-proof cable connection box according to an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a view showing a state where a lid is opened in FIG. 2;

FIG. 4 is a diagram showing a section A of FIG. 2 in a cross section.

FIG. 5 is a perspective view of FIG. 4;

FIG. 6 is a partially cutaway side view of a conventional drip-proof cable connection box.

FIG. 7 is a partially cutaway side view of another conventional drip-proof cable connection box.

[Explanation of symbols]

 Reference Signs List 4 hanging bracket 5 messenger wire 21 drip-proof cable connection box 22 connection box main body 22a opening 22b cable insertion hole 22c top surface of connection box main body 23 lid 23a step 25 rib 26 hinge 27 lid surface 28 peripheral wall 28a top 28b Upper side wall 28c Claw 28d Extension piece 28e Side wall below the cable insertion hole 30 Locking member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yoshikazu Nomura 1440 Mutsuzaki, Sakura City, Chiba Prefecture Fujikura Sakura Works Co., Ltd. F-term (reference) 5G016 AA03 CG22 5G361 AA07 AB09 AC05 AC13 5G375 AA02 BA27 BB90 DB26 EA04

Claims (3)

[Claims] 1. A drip-proof cable connection box comprising a connection box main body having an opening on a front surface and a lid for closing the opening, wherein the connection box main body protrudes from an outer peripheral surface near an opening edge of the connection box main body. A rib, wherein the lid is attached to a lower part of the connection box body so as to be openable and closable vertically via a hinge, and the lid has a lid surface part facing the opening and a peripheral wall part facing the outer periphery of the connection box body. And a portion of the peripheral wall portion above the cable insertion hole of the connection box body is a half of the depth of the connection box body.
A drip-proof cable connection box having the above length. 2. A claw, which is provided at an end in a depth direction of an upper portion of a peripheral wall portion of the lid when the lid is pushed in the depth direction, is engaged with a locking portion on a connection box main body side. Item 1
The drip-proof cable connection box described. 3. A drip-proof cable connection box having a connection box main body having an opening on a front surface and a lid for closing the opening, wherein the connection box main body protrudes from an outer periphery near an opening edge of the connection box main body. A rib, wherein the lid is attached to a lower part of the connection box body so as to be openable and closable vertically via a hinge, and the lid has a lid surface part facing the opening and a peripheral wall part facing the outer periphery of the connection box body. A drip-proof cable connection box, wherein the drip-proof is provided by a step formed on the inner surface of the peripheral wall, the rib, and a top surface.