JPS6116727Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a lifting device for a circuit breaker housed in a closed switchboard.

[Technical background of the invention and its problems]

A closed switchboard in which circuit breakers are stored in multiple stages is generally equipped with a circuit breaker lifting device for pulling out and inspecting or moving the circuit breaker. Conventionally, the configurations of the WORK ING type outdoor closed switchboard shown in FIG. 1 and the NO. WORK IN type outdoor closed switchboard shown in FIG. 2 are different.

In other words, the WORK IN type has a multi-stage circuit breaker storage unit installed inside the switchboard, a hoist frame installed above the panel door in the passageway inside the switchboard, and a hoist for hoisting and operating the circuit breaker mounted on top of this frame. They are allowed to move freely. In this case, the circuit breaker storage unit and the hoist frame installed above the door have front wheels and rear wheels that move on rails, and can move left and right within the switchboard.

However, the circuit breaker lifting device having such a configuration requires a passage within the panel for operation and movement of the lifting device, resulting in a large-sized board.

Next, the NO WORK IN type uses a portable lifter. As an accessory to the closed switchboard, this circuit breaker lifting device moves the circuit breaker lifting arm in the center of the trolley up and down with a hydraulic cylinder.
Pull out or move the circuit breaker.

However, this lifting device outside the closed switchboard requires a place to operate it in front of the switchboard as well as a separate storage space.

[Purpose of invention]

An object of the present invention is to provide a circuit breaker lifting device for a closed switchboard, which eliminates the need for a passage in the closed switchboard, allows the closed switchboard to be made smaller, and reduces the installation area.

[Structure of the idea]

An embodiment of the present invention will be described below with reference to the drawings.

Figure 3 is a side view of the installation of the circuit breaker lifting device for a closed switchboard according to the present invention.
A multi-stage circuit breaker storage unit 2 is constructed immediately after the
There is a busbar frame 3 on the back side of this unit 2. Rails 4A, 4B, and 5 are laid on the uppermost surfaces of the circuit breaker housing unit 2 and the busbar frame 3, and the pedestal 6 moves on these rails 4A, 4B, and 5. For this reason, the frame 6 has front wheels 7A, 7B that roll on the rails 4A, 4B, and a rear wheel 8 that rolls on the lower surface of the upper bent part of the rail 5, so that the upper part of the switchboard can be moved left and right. It's getting old.

In this case, stoppers 9 are provided on the sides of the box body at both ends of the rails 4, 5 to prevent the wheels 7A, 7B, 8 from coming off, as shown in FIG.

Further, rails 10 and 11 are laid on the pedestal 6 so as to face each other in the front and back direction of the power distribution board, and a hoist pedestal 12 moves on these rails 10 and 11.
For this reason, the hoist frame 12 has -
As shown in the cross section of FIG. 5, there is a pair of front wheels 13 that roll on rails 10 and 11, and at the bottom of the rear end of the hoist frame 12 there is a wheel 13 shown in FIG.
1 rolling on the bottom surface of rails 10 and 11 as shown in the figure
It has a pair of rear wheels 14 and can be moved forward and backward within the switchboard, and can be pulled out of the switchboard by opening the front door 1.

In addition, as shown in FIG. 6, at the rear ends of the rails 10 and 11, there are stoppers 15 on the inside of both sides to prevent the wheels from coming off, and a hoist 16 is fixed to a predetermined position on the hoist mount 12. .

Therefore, this hoist 16 can be stopped at a desired position by moving the hoist frame 12 back and forth and moving the frame 6 left and right.

[Effect of invention]

Next, the operation of the present invention will be explained.

First, when storing the circuit breaker in the circuit breaker storage unit 2 of the switchboard, open the front door 1 of the switchboard and pull out the hoist mount 12 to a predetermined position (indicated by the two-dot chain line in FIG. 3) using an appropriate tool or manually.

Then, manually lower the hook (not shown) of the hoist 16 on the hoist frame 12 using the appropriate handle, and move the circuit breaker (indicated by 17 in Fig. 3) brought into the front of the switchboard to the height of the storage position (Fig. 1 shows the maximum height). (indicates the upper storage position).

Here, the load of the circuit breaker 17 is applied to the tip of the hoist frame 12 that projects in a cantilevered manner toward the front of the box, but the front portion does not fall downward. In other words, the front wheel 13 of the hoist frame 12, which appears at the position indicated by the two-dot chain line in FIG. . Thereafter, the hoist frame 12 is moved backward, the circuit breaker is pushed into the circuit breaker storage unit 2, and the hook (not shown) of the hoist 16 is removed from the circuit breaker. If you wish to pull out the circuit breaker, reverse the steps above and place it on the ground or on a moving vehicle.

The above explanation is based on the case where a lifting device is installed in an outdoor closed distribution board configured as a row of panels, but in the case of a single panel, the lifting device is installed on the top surface of the circuit breaker housing unit 2 and the top surface of the busbar frame 3 as shown in FIG. As shown in the figure, rail mounting hardware 21 and 22 are attached in the front and back direction, rails 10 and 11 are laid on these, and the hoist frame 12 is moved by front wheels 13 that move on the rails and rear wheels 14 that slide on the lower surface of the rails. If you support it and place it on it, you can move it back and forth, open the front door, and pull it out of the panel.

In the above embodiment, a case where a lifting device is provided in an outdoor closed power distribution board has been described, but it can also be applied to an outdoor closed power distribution board where there is a support such as a beam on the ceiling in front of the power distribution board.

[Effect of idea]

As described above, according to the present invention, the hoist frame can freely move back and forth, and is configured so that it will not fall over even if it is projected in a cantilever shape in front of the door.
We have developed a circuit breaker lifting device for closed switchboards that can reduce the overall size of an IN-type outdoor closed switchboard, and can significantly reduce the operating space for NO WORK IN-type outdoor closed switchboards compared to conventional portable lifters. Obtainable.

[Brief explanation of the drawing]

Figure 1 is a configuration explanatory diagram showing an example of the use of a circuit breaker lifting device for a conventional WORK IN type outdoor closed switchboard, and Figure 2 is an example of the use of a conventional NO WORK IN type circuit breaker lifting device for an outdoor closed switchboard. FIG. 3 is a side view showing one embodiment of the present invention, FIG. 4 is a cross-sectional view of FIG. 3, FIG. 5 is a cross-sectional view of FIG. FIG. 7 is a plan view showing another embodiment of the present invention corresponding to FIG. 4, and FIG. 8 is a cross-sectional view taken from FIG. 7. 10, 11...Rail, 12...Hoist frame, 13...Front wheel, 14...Rear wheel, 16...
Hoist.

Claims (1)

[Scope of Claim for Utility Model Registration] A lifting device provided above the topmost stage of the equipment room of a box body having a multi-level equipment room and a door on the front, for carrying in and out the circuit breaker in the equipment room. , a pair of rails provided in parallel in the front-rear direction above the uppermost stage of the equipment room; a first wheel provided on the pair of rails and rolling on the pair of rails in an intermediate portion; and a rear part. and a pedestal having a second wheel rolling on the lower surface of the pair of rails; and a hoist attached to the front part of the pedestal for lifting and transporting the circuit breaker in the equipment room. Equipment for lifting vessels.