JPS5932168Y2 - Closed switchboard shielding device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improvement of a shielding device for a closed switchboard.

In closed switchboards with draw-out equipment, a shield L device is used as a method to protect people from live parts, but one way to install this shield device is to cover the live parts themselves. One method is to cover the opening after the device is pulled out.

Conventionally, the former method was mainly used to cover the live parts themselves, but this required many parts such as levers and guides for interlocking the shield plate, making it expensive. The manufacturing method required a lot of skill, as the interlocking of the drawer equipment and the shingle plate required delicate adjustments.

The object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a simple and inexpensive device.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

1 is a closed switchboard, 2 is a door that opens and closes an entrance provided in the closed switchboard 1, a pull-out equipment trolley is used to enter and exit the closed switchboard by opening and closing this door 3, and 4 is a barrier provided inside the closed switchboard. A disconnecting section 5 is attached to.

One side of the disconnecting section 5 is connected to the power supply side bus bar, and the other side is connected to the contact 6.

Reference numeral 7 denotes a rotatable wheel provided on the pull-out equipment trolley 2, which engages with a rail 8 installed on the bottom of the closed switchboard.

Reference numeral 9 denotes a support fitting fixed to the side surface of the pull-out equipment cart. Four support fittings 9 are installed on the front, back, left and right sides of the pull-out equipment stand, and an arm portion 10 is provided on the upper part of the support fitting, extending in the side direction of the pull-out equipment stand.
is fixed.

This arm part is a front first arm part 10 on the depth side.
a.

10b, and a second arm portion 10c on the rear side.

10d.

The first arm portion and the second arm are installed at a distance that allows the later-described baffle plate to be opened and closed at the same time.

- In a lucky example, the first arm part 10a is the first arm part 1 on the other side.
It is arranged on the deeper side than 0b, that is, on the charging part side.

The length h1 of the first arm parts 10a, 10b is shorter than the length h2 of the second arm parts 10c, 10d.

In other words, there is a relationship of h 1 < h 2 .

Rotatable rollers are attached to the tips of these arm sections, and the length of the arm section includes the length of the roller.

As shown in FIG. 3, 11a and 11b are left and right baffle plates that are provided in the closing switchboard corresponding to the door 3, and are supported by spring-loaded hinges 12.

The spring-loaded hinge 12 always has a spring force acting in a direction that closes the blocking plates 11a and 11b.

Reference numeral 13 denotes a receiving metal fitting 14 fixed to one side plate 11a.
The stopper is supported by a stepped bolt 18 attached to the other shielding plate 11b, and rotates about the stepped bolt as a fulcrum, but the stopper is supported by a stopper pin 15 attached to the other shielding plate 11b. and prevent rotation.

19 is a spring. When pulling out devices such as the voltage transformer 17 and the fuse 16 together with the trolley 2 in a closed switchboard, it is extremely dangerous for anyone to enter the main body frame 1 because the disconnecting section 5 is being charged at high voltage. .

Therefore, it becomes necessary to provide a shielding device to prevent people from entering the storage space after the cart 2 is pulled out.

The present invention relates to an improvement of this shielding device, and will be explained in detail with reference to FIGS. Spring hinge 12 that always exerts spring force in the direction of closing
and install.

Further, first arm portions 10a and 10b are provided at the leading end of the truck 2 for pushing the four shield plates 11, two pairs on the left and right sides.

The first arms 10a and 10b are attached to the support fittings 9 (FIG. 5) at an appropriate height so as to press against the center of the shield plate 11.

After the pull-out cart 2 is pulled out, the shield plate naturally closes from the left and right sides as shown in FIG. 3 by the spring force of the spring hinge 12 shown in FIGS. 6 and 7.

The closed baffle plate 11 is provided with a receiving fitting 14 on the left baffle plate 11a and a stopper 13 on the right baffle plate 11b.
As shown in Figs. 8 to 10, a canopy 13' is hung to integrate the left and right shield plates so that they cannot be easily opened.

In the structure of the shield plate described above, the left shield plate fib must be closed before the right shield plate 11a, and must be opened later.

This operation will be explained with reference to FIG.

When pushing the trolley 2 into the closed switchboard, the first arm portion 10a attached to the right end of the trolley 2 is inserted into the right baffle plate 11a.
Push it open, then open the second arm part 1 attached to the left tip.
0b pushes the left guard plate 11b.

For this reason, one first arm portion 10a is attached closer to the disconnection portion 5 than the other second arm portion 10b.

Therefore, one of the first arm portions 10a is placed first on the baffle plate 1.
1a, the other first arm portion 10b presses the shielding plate 11b, so that the right shielding plate 11a
Open first.

Thereafter, the left shielding plate 11b opens with a delay.

Furthermore, when pulling out the pull-out cart 2 from the closed switchboard, the operation is reverse to the above-mentioned pushing operation.

When pulled out, the second arm 10c. 10b deshiyahei board 1
When moving forward while suppressing and holding 1a and 11b, since there is a relationship h 1 < h 2, the first arm part 1
0a and 10b do not collide with the tips of the stiffening plates 11a and 11b.

For this reason, the arm portion moves smoothly on the shingle board, so it does not damage the shiyahei board.

In this way, it is possible to open and close the left and right shield plates in an orderly manner with a simple structure in which four arms are installed on the drawer, and the rollers installed at the ends of the arms do not damage the shield plates. do not have.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a conventional closed switchboard, Fig. 2 is a side sectional view when the trolley is pulled out from Fig. 1, and Fig. 3 is a front view of a shroud plate shown as an embodiment of the present invention. Fig. 4 is a plan view when viewed from above Fig. 3, Fig. 5 is a detailed sectional view of the roller, Fig. 6 is a plan view of the spring hinge, Fig. 7 is a front view of Fig. 6, and Fig. 8 10 to 10 are diagrams showing the stopper, FIG. 8 is a front view, FIG. 9 is a plan view, and FIG. 10 is a side sectional view. 1... Closed switchboard, 2... Trolley, 10
... Arm part, 11 ... Shield plate,
12...Spring hinge.

Claims (1)

[Scope of utility model registration request] A closed switchboard having an entrance/exit, a barrier installed inside the closed switchboard, a live part attached to the barrier, a drawer device that goes in and out of the closed switchboard and electrically connects and disconnects from the live part, and a barrier and an entrance/exit. It is equipped with a left and right baffle plate that opens while being pressed when a pull-out device installed inside the closed switchboard is moved into the closed switchboard, and closes when the pull-out device is pulled out from inside the closed switchboard. In this device, a first arm portion and a second arm portion are provided at the front and rear of both sides of the drawer device that opens and closes the shield plate at the same time, and the length dimension of the two arm portions is set to the length of the first arm portion. One side of the first arm part arranged on both sides is placed closer to the live part (jl!+1) than the first arm part on the other side, and when the left and right shield plates are closed, the live part side A shielding device for a closed switchboard, characterized in that one side of the left and right shield plates in contact with the first arm part and the second arm part are arranged so as to overlap and close inside the other shield plate.