JP3992327B2 - Switch tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch tool used when removing a switch for underground power distribution installed in a switch storage box (cabinet).
[0002]
[Prior art]
7A is a front view showing the switch 51 installed in the switch storage box 50, and FIG. 7B is a side sectional view.
The switch 51 is connected to the connection bus 52 through a bushing provided on the top of the switch 51.
In addition, about the switch attachment bracket for fixing the switch 51 in the switch storage box 50, it is abbreviate | omitting in the figure.
[0003]
FIG. 8 is an exploded perspective view showing the separating tool 60 among the conventionally used switches for disconnecting and removing the switch 51 from the connection bus 52.
The separating tool 60 includes a pedestal 61 for receiving the lower end portion of the connection bus 52 and two fixing plates 62.
One of the leg portions 62 a of the fixing plate 62 is inserted into the slit 61 a provided in the pedestal 61 for use.
[0004]
FIG. 9 is a view showing a state in which the separation tool 60 is attached to the switch 51 and the connection bus 52.
Hereinafter, a method of using the separating tool 60 will be described with reference to FIGS.
The pedestal 61 receives the lower end portion of the connection bus 52 (there are three phases because there are three) via three semicircular seats 61b.
The lower end of the leg portion 62a of the fixed plate 62 is disposed on the upper surface of the switch.
The wire 63 (see FIG. 9) passes through the wire hole 61c provided in the pedestal 61, passes through the wire hole 62b provided in the fixing plate 62, and the wire groove 62c, and is connected to the winch.
The head fitting 63 a at the end of the wire 63 engages with the wire hole 61 c of the pedestal 61, and the end 64 a of the sliding tube 64 of the wire 63 is pressed against the side surface of the fixed plate 62.
[0005]
From this state, when the wire 63 is pulled up by the winch, the end of the wire lifts the pedestal 61 upward along the leg portion 62a of the fixing plate 62, and the connection bus 52 and the switch 51 are pulled apart (see FIG. 10).
In addition, although it is not clear in the figure, two sets of the wire 63 and the sliding tube 64 are arranged in parallel and connected to one winch.
[0006]
In FIG. 9, the other wire 65 and the sliding tube 66 serve to receive the switch 51 separated from the connection bus 52.
The wire 65 is passed through wire hooking portions 53a provided on both side surfaces of the switch fixing bracket 53 (metal fitting for fixing the switch to the switch storage box), and further on the upper and lower sides of the switch 51. The projections 51a and 51b provided are passed through holes and connected to the winch.
The head metal fitting 63a of the wire 65 is fixed to the wire hooking portion 53a.
An end portion 66a of the sliding tube 66 is in contact with the lower surface of the protruding portion 51b.
In the drawing, only one wire 65 and one sliding tube 66 are shown, but actually, the wire 65 and the sliding tube 66 are also installed on the opposite side surface of the switch 51, and there are two The wire 65 is connected to one winch.
[0007]
FIG. 10 is a view showing the operation of the separation tool 60, the wire 65, and the sliding tube 66.
Simultaneously with the work of pulling the switch 51 away from the connection bus 52 by the above-described pulling tool 60, the operator operates another winch connected to the wire 65 to loosen the wire 65. Then, the switch 51 that is pulled away from the connection bus 52 and gradually descends is received by the end portion 66 a of the sliding tube 66.
This work is a joint work between one worker who operates the winch connected to the wire 63 of the separating tool 60 and another worker who operates the winch connected to the wire 65, and adjusts the operation timing. Done.
[0008]
[Problems to be solved by the invention]
However, the conventional switch tool described above requires two winches having a large volume and weight, and requires at least two workers to operate the winches.
In addition, the work has to be performed in synchronism with the operation timings of the two winches, which requires the skill of the operator.
In particular, when the switch is urgently removed due to an accident such as a switch, it takes time to work, and it has been desired to reduce the work time from the site of the electric power company.
[0009]
Accordingly, the present invention is intended to provide a lightweight and small switch tool that allows a worker to remove the switch easily and in a short time.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 has a pressing plate that sandwiches and holds a part of the ceiling of the switch storage box, and a seat that receives the lower end of the connection bus, and is suspended from the pressing plate. A separation tool including a frame provided, a rotation mechanism provided on the frame, and a handle and a cam fixed to a rotation shaft of the rotation mechanism.
Furthermore, it is provided between the backing plate, the base portion, and the backing plate and the base portion, and is either an elastic body such as a rubber bush, an air cushion formed of rubber, or a coil spring . a shock absorber is made up of, and a cradle disposed below the switch.
And, when the handle is rotated around the rotation axis, the pull-off tool presses down the upper surface of the switch to disconnect the switch from the connection bus,
The cradle flexibly receives the switch lowered by its own weight, and supports the switch in a state where the switch is lowered to a position where the gravity of the switch placed on the receiving plate and the drag of the shock absorber are balanced. It is characterized by doing.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view showing a state in which the embodiment is installed inside a switch storage box 50.
The embodiment includes a separating tool 1 that is used to separate the switch 51 from the connection bus 52 and a cradle 10 that flexibly receives the separated switch 51.
[0012]
The separating tool 1 includes a pressing plate 2 fixed to the ceiling portion of the switch storage box 50, a frame 3 suspended from the pressing plate 2, a rotating mechanism 4 provided on a substrate 3a of the frame 3, A handle 5 fixed to the rotation shaft of the rotation mechanism 4 and a cam 6 are provided.
The cradle 10 includes a receiving plate 11 that receives the switch 51, a pedestal portion 12, and a coil spring 13 as a shock absorber provided between the receiving plate 11 and the pedestal portion 12.
[0013]
2 is a configuration diagram of the separating tool 1 of the embodiment, FIG. 2 (a) is a plan view of the separating tool 1 (the pressing plate 2 is omitted), FIG. 2 (b) is a front view, FIG. (C) is a side view.
The handle 5 is shown separately in FIG.
[0014]
The holding plate 2 sandwiches a part of the ceiling of the switch storage box 50 by two plates forming a U-shape, and fixes and holds the pulling tool 1 to the switch storage box 50.
A structure in which the interval between the two plates can be adjusted by loosening the wing nut 2a screwed to the bolt so that the switch can be fixed according to the width of the ceiling portion of the switch storage box 50 (FIG. 2C). reference).
[0015]
A frame 3 is suspended from the pressing plate 2.
The spacer 7 inserted between the pressing plate 2 and the frame 3 is for absorbing an error in the distance between the ceiling portion of the switch housing box 50 and the switch 51.
The base plate 3a constituting the lower part of the frame 3 is provided with a seat 3b in a semicircular cutout.
The seat 3b is a surface that receives the lower end surface of the connection bus 52 and exerts a force for pulling the connection bus 52 away from the switch 51 by rotation of the handle 5 described later.
[0016]
A rotation mechanism 4 is provided on the substrate 3a.
The rotating mechanism 4 includes a rotating shaft 4a and a bearing 4b that guides the rotating shaft 4a. The bearing 4b is fixed to the substrate 3a.
[0017]
A handle 5 is fixed to the rotary shaft 4a via a U-shaped connection fitting 5a.
Further, two plate-like cams 6 are fixed to the rotating shaft 4a.
[0018]
3A and 3B are external views of the handle 5 of the separating tool 1, FIG. 3A is a plan view, and FIG. 3B is a front view.
A grip 5a is provided at the end of the handle 5, and an operator can remove the switch 51 manually by one person.
[0019]
4A and 4B are external views of the cradle 10 according to the embodiment. FIG. 4A is a front view and FIG. 4B is a side view.
The cradle 10 includes a cradle 11 that receives the switch 51, a pedestal portion 12, and four coil springs 13 as shock absorbers provided between the cradle plate 11 and the pedestal portion 12.
The coil spring 13 surrounds and is held by a spring guide 14 fixed to the base portion 12.
In the embodiment, the coil spring 13 is used. However, the present invention is not limited to this. For example, the air cushion formed of an elastic body such as a rubber bush or rubber, and the receiving plate 11 and the base 12 It is also possible to have a structure sandwiched between them.
[0020]
Next, the operation of the embodiment will be described.
The separating tool 1 and the cradle 10 are arranged as shown in FIG. 1, and the handle 5 is manually operated upward about the rotation shaft 4a.
FIG. 5A is a diagram showing a state in which the operation of the handle 5 is started.
Two plate-like cams 6 fixed to the rotating shaft 4 a pressurize the upper surface of the switch 51 by the handle 5.
Accordingly, the frame seat 3b pressurizes the lower end surface of the connection bus 52 upward from below.
FIG. 5B is a diagram showing a state in which the bushing 51c at the top of the switch 51 starts to come off from the connection bus 52 and the switch 51 starts to drop downward.
As the switch 51 is lowered, the cradle 10 (not shown in FIG. 5) arranged at the lower part of the switch gradually receives the weight of the switch 51 by the action of the coil spring 13.
When the switch 51 is completely pulled away from the connection bus 52, the total weight of the switch 51 is applied to the cradle 10, and the receiving plate 11 is lowered to a position where the weight of the coil spring 13 and the switch 51 is balanced. Removal of 51 is completed.
FIG. 6 is a view showing a state where the removal of the switch 51 is completed.
[0021]
【The invention's effect】
As described above, according to the first aspect of the present invention, a winch is not required, and a single operator can remove the switch installed in the switch storage box in a short time. Furthermore, since the switch tool of the present invention is lightweight and small, it is easy to handle and the working time can be shortened.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a state in which an embodiment is installed in a switch storage box.
2A and 2B are configuration diagrams of the separation tool of the embodiment, in which FIG. 2A is a plan view of the main part of the separation tool, FIG. 2B is a front view, and FIG. 2C is a side view.
3A and 3B are external views of a handle of a separation tool, where FIG. 3A is a plan view and FIG. 3B is a front view.
4A and 4B are external views of the cradle according to the embodiment, in which FIG. 4A is a front view and FIG. 4B is a side view.
FIG. 5A is a diagram showing a state in which the operation of the handle is started. FIG. 5B is a view showing a state in which the bushing at the top of the switch starts to come off from the connection bus and the switch starts to drop downward.
FIG. 6 is a view showing a state in which the removal of the switch is completed.
7A is a front view showing a switch installed in a switch storage box, and FIG. 7B is a side sectional view.
FIG. 8 is an exploded perspective view showing a conventional separating tool.
FIG. 9 is a view showing a state in which a separating tool is attached to a switch and a connection bus.
FIG. 10 is a view showing the operation of a conventional switch tool.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Separation tool 2 Holding plate 2a Nut 3 Frame 3a Substrate 3b Seat 4 Rotating mechanism 4a Rotating shaft 4b Bearing 5 Handle 5a Connecting metal 6 Cam 10 Receiving base 11 Receiving plate 12 Stand 13 Coil spring 14 Spring guide

Claims (1)

In the switch tool to remove the switch placed in the switch storage box,
A holding plate that sandwiches and holds a part of the ceiling of the switch storage box, a seat that receives a lower end portion of the connection bus, a frame that is suspended from the holding plate, and a rotation mechanism that is provided on the frame; A pulling tool comprising a handle and a cam fixed to the rotating shaft of the rotating mechanism;
It is provided between the backing plate, the base portion, and the backing plate and the base portion, and is either an elastic body such as a rubber bush, an air cushion made of rubber, or a coil spring. A shock absorber, and a cradle disposed below the switch;
Have
When the handle is rotated about the rotation axis, the cam pushes down the upper surface of the switch to disconnect the switch from the connecting bus,
The cradle flexibly receives the switch lowered by its own weight, and supports the switch in a state where the switch is lowered to a position where the gravity of the switch placed on the receiving plate and the drag of the shock absorber are balanced. A switch tool characterized by that.

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