JPH073761Y2 - On-road distribution box - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a road-mounted distribution box, and more particularly to a road-mounted distribution box in which a dew condensation does not occur on an inner wall of a storage unit for storing a switch installed on the road. Shaped distribution box.

[Prior Art] A road-mounted switch is connected to a cable launched from a manhole, a handhole, or the like, and is housed in a metal outer box to be protected from the outside. The outer box has a door on the front side, and by opening the door, it is possible to operate the switch and work on the cable connection part.

However, the conventional outer casing of a switch installed on the road is in a high humidity state due to the evaporation of water vapor from the water accumulated in the manhole and handhole, which causes dew condensation on the inner wall of the outer casing. Sometimes. For this reason, water droplets adhere to the switch, causing rust and the like, which leads to deterioration of the switch and reduces durability and reliability.

Therefore, a distribution box has been proposed in which the inside of the outer box is divided into two parts by a separating plate, the upper chamber serves as a switch compartment, and the lower chamber serves as a cable connection room. According to this distribution box, the switchgear is completely shielded from the manhole, the handhole, etc. by the separating plate, so that it is not affected by water vapor and the occurrence of dew condensation can be prevented.

[Problems to be solved by the device]

However, the distribution box divided into two parts by the separating plate has the following problems.

(1) Packing may be interposed between the outer box and the separating plate,
In order to ensure water tightness by applying caulking, etc., and also to provide a bottom plate through which the cable penetrates at the bottom of the outer box,
The structure is complicated and the installation work of the outer box is troublesome.

(2) Since the work such as the cable connection part is performed only by opening the front door, the work space is small and the workability is low. Moreover, even if the outer box was deteriorated, it could not be easily replaced.

Therefore, an object of the present invention is to provide a road-mounted distribution box that can easily prevent dew condensation while being easy to construct.

Another object of the present invention is to provide a roadside distribution box in which the outer box can be easily removed when necessary, thereby providing sufficient working space for work such as cable connection. .

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a support stand in the shape of a tower on which electric equipment such as a switch is placed on the base metal fitting, and after placing the electric equipment on this support stand, the outer box is placed. It hangs from above to surround the electric equipment and the support stand, and by forming a watertight structure between the support stand and the outer case, a watertight accommodating chamber for the electric equipment is formed above the mounting surface inside the outer case, (EN) Provided is a roadside distribution box in which a non-watertight accommodating chamber for cables and bushings is formed below a mounting surface inside an outer box. The electric equipment mounted on the support is connected to the electric cable via the mounting surface of the support, but since the electric equipment and the mounting surface can be assembled in advance to have a watertight structure, the outer box When replacing the case, or when removing the outer case for construction and then returning it to the original, it is sufficient to simply provide a watertight mechanism between the outer case and the support base.

The above-mentioned on-road distribution box of the present invention is summarized as follows.

(B) The electric equipment such as the switch is supported by a support stand so as to be self-supporting.

(B) The support base is fixed on the base metal fitting.

(C) The outer box has an open bottom, and the remaining five sides are integrated. A door for operating electric devices is provided on the upper front part.

(D) Suspend the outer box from above to enclose the electrical equipment and support base. Therefore, it can be easily removed by lifting it up.

(E) The outer box has a screw hole into which the hanging hook or the blind cap is screwed on the ceiling surface, and by using this screw hole, the outer box and the electric device can be fixed.

〔Example〕

 Hereinafter, the on-road distribution box of the present invention will be described in detail.

1 (a) and 1 (b) show an embodiment of the present invention, in which a base metal fitting 1 is provided in an opening (not shown) such as a manhole or a handhole. Support base 2 on base metal fitting 1
The switch 3 is mounted on the mounting surface 2A of the support base 2. The bushing 5 of the switch 3 is connected to a cable 4 rising from a manhole, a handhole or the like via a cable connecting portion (not shown). The watertight mechanism between the bushing 5 and the support 2 will be described with reference to FIGS. 2 (a) and 2 (b). Regarding the switch 3, the movable electrode 6, the mechanism portion 7, the operation handle 8 and the like are shown, but the details thereof are omitted here. However, the type and size of the switch are not limited,
Further, it may be an electric device other than the switch. Mechanism part 7
A fixing portion 7a is provided on the upper surface of the and is fixed to the outer case 10 by a blind bolt 9. The outer box 10 has a door 20.
Since the door 20 is engaged with the outer box 10 by the hinge at the upper side 20A, it can be opened and closed when the switch 3 is operated. Therefore, when the movable electrode 6 of the switch 3 is moved up and down by the operation handle 8, the door 20 Is released. When the opening / closing operation is completed, the door 20 is closed. It is preferable that a packing or the like is inserted between the door 20 and the outer box 10 to have a predetermined watertight structure. The outer box 10 has a holding flange 11 at a position corresponding to the mounting surface 2A of the support base 2, compresses the packing 12, and has ventilation holes 10A on both side surfaces. A guide plate 19 that guides the bottom opening of the outer case 10 is provided around the lower portion of the support base 2. The mechanism portion 7 is provided with a handle attachment portion 21.

FIG. 2 shows a packing 12 affixed around a support base 2 surrounded by an outer box 10 and a packing member 13 located on the mounting surface 2A of the support base 2. The pressing flange 11 for compressing the packing 12 is not shown. The packing member 13 has a through hole 14 through which the bushing 5 of the switch 3 penetrates in a watertight manner. FIG. 2B shows the packing member 13
Is composed of the packing layer 16 and the metal plate layer 17, and the bushing 5 penetrates the through hole 14 formed therein. The inner diameter of the through hole 14 is determined by the packing layer 16 and is slightly smaller than the outer diameter of the bushing 5.
The packing 12 described above is attached to the outer edge surface of the support base 2, and is compressed by the pressing flange 11 described above. The switch 3 is fixed to the support base 2 with bolts 15.

FIG. 3 is an exploded view of the switch 3 having the support base 2, the packing member 13, and the bushing 5. The packing member 13 is placed on the mounting surface 2A of the support base 2, and the bushing 5 is inserted into the through hole 14.
When the switch 3 is placed through the
And the structure shown in FIG. 2B is obtained.

Hereinafter, a method for assembling the on-road distribution box of the present invention will be described.

First, as shown in FIG. 3, a packing member having a through hole 14 in the mounting surface 2A of the support base 2 to which the packing 12 is attached.
Place 13. Next, the switch 3 is placed in the through hole 14 of the packing member 13 through the bushing 5 of the switch 3. In this state, the switch 3 is fixed to the support base 2 with the bolt 15. The bushing 5 is connected to the cable 4. The connection may be performed by a connection work by an operator, or may be a one-touch connection by a plug-in method. After this,
A hanging bolt 18 is fitted on the upper surface of the outer box 10, the outer box 10 is hoisted by an appropriate means such as a crane, and is hung down so as to surround the support base 2 and the switch 3 mounted on the mounting surface 2A. . When the hanging is completed, the hanging bolt 18 is removed and the blind bolt 9 is fitted. Blind bolt 9 is outer box 10
The switch 3 is fixed via the fixing portion 7a. The packing attached to the support base 2 by this fixing is compressed by the pressing flange 11.

FIG. 4 (a) shows the on-road distribution box of the present invention assembled in this manner.

FIG. 4 (b) shows a state in which the outer box 10 is lifted after the assembling. At this time, the blind bolt 9 is replaced with the hanging bolt 18 and lifted. The hanging bolt 18 has a shorter length than the blind bolt 9 and does not fix the switch 3. In Fig. 4 (b), not only is cable construction possible, but the deteriorated outer casing 10 can be replaced with a new outer casing 10.

FIG. 4C shows that the opening / closing operation of the switch 3 can be performed by the operation handle 8 by opening the door 20 of the outer box 10.

[Effect of device]

As described above, according to the on-road distribution box of the present invention, the following effects can be obtained.

(1) Since the outer box can be hung from above and installed, excellent workability can be obtained during installation. Also, by hoisting it upwards, a wide working space for cable work can be obtained, and a new outer box can be easily replaced.

(2) Electrical equipment such as a switch is placed on the support base, and the electrical equipment and the bushing are watertight, and the support and the outer box are watertight, so that the electrical equipment is stored. It is possible to reliably prevent dew condensation from occurring in the space.

(3) By attaching a packing on the outer edge of the support base, a watertight chamber for electrical equipment is provided above the mounting surface inside the outer box, and a cable and bushing are provided below the mounting surface inside the outer box. The non-watertight accommodating chamber can be easily formed.

(4) By providing a through hole in the support base and lining the through hole with packing, a water-tight structure can be easily provided between the support base and the bushing of the electric device.

(5) Since it is not necessary to provide a door that opens and closes the entire front surface of the outer box, the structure of the outer box is simplified and the inside of the outer box is made watertight.

[Brief description of drawings]

1 (a) and 1 (b) show an embodiment of the present invention,
(A) is a front view and (b) is a side view. FIG. 2A is an explanatory view showing a mounting surface of a switch according to an embodiment. FIG. 2B is a sectional view showing a watertight structure between the support and the switch bushing. FIG. 3 is an exploded view showing a watertight structure between the support and the switch bushing. 4 (a), (b), and (c) are explanatory views showing a fixed state of the outer box, a lifted state of the outer box, and a mounted state of the operation handle in one embodiment. Explanation of symbols 1 ... Base metal fitting, 2 ... Support base 3 ... Switch, 4 ... Cable 5 ... Bushing, 6 ... Movable electrode 7 ... Mechanical part, 8 ... Operation handle 9 ... Blind bolt , 10 …… Outer box 11 …… Holding flange, 12 …… Packing 13 …… Packing member, 14 …… Through hole 15 …… Bolt, 16 …… Packing 17 …… Metal member, 18 …… Lifting bolt 19 …… Guide member, 20 …… Operating door

Claims (1)

[Scope of utility model registration request] 1. A mounting surface which is fixed to a base member provided in an opening such as a manhole or a handhole, and on which an electric device such as a switch accommodated in a frame is mounted at a predetermined height level above a road surface. And a first packing member provided at an edge of the mounting surface, and a mounting portion of the electrical device on the mounting surface, wherein the bushing of the electrical device is watertight. A second packing member having a through hole penetrating therethrough and a detachable lifting bolt are attached, and the supporting base and the frame are surrounded by being suspended from above via the lifting bolt, and the lifting bolt is replaced. A blind bolt that is screwed to the frame, and the blind bolt is screwed to the frame to have a flange on the inner surface that compresses the first packing member. And, when the outer box is fixed to the frame by the blind bolt, the outer box has a ventilation hole in a portion surrounding the support table, and the electric field is provided above the mounting surface inside the outer box. A on-road distribution box characterized by forming a watertight storage chamber for equipment and a non-watertight storage chamber having the ventilation hole for a cable and a bushing below the mounting surface.