JPH0584104U - Tool for opening and closing the shutter plate - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a tool for opening and closing a shutter plate, which can be opened and closed safely and easily, has a simple structure, and is inexpensive. A pair of operation levers provided on both sides of the equipment chamber for opening and closing a shutter plate, or engagement arms 21 for engaging with rollers provided so as to face each other inside the pair of operation levers are provided. A connecting frame 22 for connecting the engaging arms 21 and an axle 23, which is rotatably fitted to both ends of the connecting frame 22 and is shorter than the connecting frame 22, are connected to the wheel 2
While connecting with the connecting arm 25 longer than the radius of 4,
An operation frame 26 having a length several times the distance between the center of the tip of the engaging arm 21 and the center of the axle 23 is provided in the central portion of the axle approximately perpendicular to the connecting arm 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tool for opening and closing a shutter plate that shields the front surface of a disconnection section provided on a partition wall of a closed switchboard.

[0002]

[Prior Art]

 FIG. 3 is a side sectional view of a closed switchboard installed on the floor 1, 3 is an equipment room for accommodating the circuit breaker 4 shown by the chain double-dashed line, 5 is a power supply side busbar 6, a load side busbar 7 and the like. A bus bar room 8 is a partition wall between the equipment room 3 and the bus room 5. Reference numeral 9 denotes a disconnection portion provided on the partition wall 8, and the front surface of the disconnection portion 9 is shielded by a shutter plate 12 attached to an arm 11 which rotates around pins 10 provided on both sides of the equipment chamber 3. The conductor of the disconnection part is prevented from being exposed. Reference numeral 13 is an operating rod provided with a protruding pin 14 for pushing the arm 11 upward, 15 is a guide for the operating rod 13, and 16 is swinging around pins 17 provided on both sides in the equipment chamber 3. In addition, an operating lever provided with a roller 18 protruding inward and engaging with the cam of the circuit breaker 4 is a connecting portion between the operating rod 13 and the operating lever 16. The pin protruding from the operating rod 13 of the connecting portion 19 is fitted into a long hole provided along the longitudinal direction of the operating lever 16 to convert the circular movement of the tip of the operating lever 16 into the vertical movement of the operating rod 13. is doing. The operation mechanism of the shutter plate 12 including the operation rod 13, the operation lever 16 and the like is provided on both sides inside the equipment chamber 3. Further, 20 is a downward stopper of the operating lever 16.

In FIG. 3, a pair of cams provided on both sides of the circuit breaker 4 shown by a chain double-dashed line are provided with rollers 18 projecting at positions inside the pair of operating levers 16 that face each other. When the circuit breaker 4 is pushed into the equipment chamber 3 from this position, the roller 18 is moved upward by the inclined portion of the cam and reaches the horizontal portion of the cam. The operation lever 16 is rotated counterclockwise about the pin 17 to push up the operation rod 13 upward, and the shutter plate 12 is rotated upward via the pin 14 and the arm 11 as shown by a chain double-dashed line. , The front of the disconnector 9 is opened. When the circuit breaker 4 is pushed further, the conductor terminals of the circuit breaker 4 are inserted into the disconnecting section 9 and connected. On the contrary, when the breaker 4 in the connected state is pulled out and the roller 18 moves downward on the sloped portion of the cam of the breaker 4, the operation lever 16 rotates clockwise around the pin 17 to operate the operation lever 16. Since the pad 13 is pulled down and the pin 14 also moves downward, the shutter plate 12 attached to the arm 11 rotates counterclockwise around the pin 10 by its own weight to shield the front surface of the disconnecting section 9. ..

As described above, in order to confirm the operation of the shutter plate 12 in the closed switchboard 2 that houses the circuit breaker 4, a person enters the inside of the equipment room 3, swings the operation lever 16 by hand, and disconnects the circuit. To check the inside of the unit, rotate the operation lever 16 to open the shutter plate 12, insert a block or other padding into the lower portion of the operation lever 16, and hold the shutter plate 12 in the open position. The shutter plate 12 that can be opened independently of the lever 16 and the operating rod 13 is lifted directly by hand to open it, and the shutter plate 12 is held at the open position by some means.

[0005]

[Problems to be solved by the device]

 Since it is difficult to simultaneously lift the pair of operating levers 16 provided near both side walls in the equipment room 3 by hand at the same time, and because the circuit breaker 4 becomes large and the shutter plate 12 becomes large, the weight also increases. Add to the difficulty. Further, when the shutter plate 12 is directly lifted by a hand, the conductor of the disconnecting section 9 may come into contact with the hand, or may approach and get an electric shock, which is dangerous.

An object of the present invention is to provide a tool for opening and closing a shutter plate that is safe and easy to open and close, and has a simple structure and is inexpensive.

[0007]

[Means for Solving the Problems]

 Means for solving the above problems in the present invention is a pair of operating levers provided on both sides of an equipment room for opening and closing a shutter plate, or rollers provided so as to face each other on the inner side of the pair of operating levers. A connecting frame for connecting between the engaging arms, and an axle shorter than the connecting frame on which wheels are rotatably fitted at both ends and longer than the radius of the wheel. In addition to being connected by a connecting arm, an operation frame having a length several times the distance between the tip of the engaging arm and the center of the axle is provided in the central portion of the axle at a substantially right angle to the connecting arm.

[0008]

[Action]

 Carry the opening / closing tool of the present invention with wheels that is easy to move into the equipment room where the circuit breaker is pulled out. When the tip ends of the engaging arms are engaged with the pair of operation levers provided on both sides of the equipment chamber or the rollers provided so as to face each other inside the pair of operation levers, and the operation frame is pushed down, The engagement arm pushes up the pair of operation levers and rotates to open the shutter plate.

[0009]

【Example】

 Hereinafter, the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a view showing a tool for opening and closing a shutter plate according to an embodiment of the present invention. Reference numeral 21 denotes a member for engaging with a roller 18 provided so as to face each other inside a pair of operation levers 16 in FIG. The arms are bifurcated so that they can be easily inserted into the roller 18. Reference numeral 22 is a connection frame for connecting the engaging arms 21 at both ends, 23 is shorter than the connection frame 22, and an axle having wheels 24 rotatably fitted at both ends for facilitating the movement of the tool of the present invention, 25 is an axle 23 With the connecting arm that connects the connecting frame 22 to the, the length of the connecting arm is longer than the radius of the wheel 24 so that the connecting frame 22 longer than the axle 23 can rotate around the axle 23 (that is, the wheel 24). I am trying. Numeral 26 is fixed to the central portion of the axle 23 at a substantially right angle to the connecting arm 25. In order to facilitate the operation by the principle of the lever, 26 is several times the distance between the tip of the engaging arm 21 and the center of the axle 23. The operation frame 27 having a length is a handle attached to the tip of the operation frame 26 in a T-shape in consideration of the opening / closing operation of the shutter plate 12 and the movement of the tool of the present invention, and 28 is a reinforcing frame.

FIG. 2 is an explanatory view of opening / closing operation of the shutter plate by the tool according to the present invention described above. After the circuit breaker is pulled out from the equipment room 3 of the closed switchboard 2, the tool for opening / closing the shutter plate is carried in. , The bifurcation of the tip of the engaging arm 21 is inserted into the rollers 18 projecting in opposition to each other inside the pair of operation levers 16 provided on both sides in the equipment chamber 3, and the operation frame 26 is moved in the direction of arrow a. When it is pushed down, the engagement arm 21 pushes up the roller 18, the operation lever 16 pivots around the pin 17 in the direction of arrow B, pushes up the operation rod 13, and lifts the shutter plate 12 as shown by arrow C. Rotate upward to open the front surface of the disconnecting section 9. When the operation frame 26 is returned to its original position, the roller 18 moves downward, the operation lever 16 pulls down the operation rod 13, the shutter plate 12 rotates downward, and shields the front surface of the disconnecting section 9. Since the operation frame 26 is sufficiently long compared to the distance between the tip of the engaging arm 21 and the center of the axle 23, the shutter plate 12 can be easily opened and closed by the principle of the lever to check the operation. You can

When the operation frame 26 is pushed down in the direction of arrow a, the roller 18 is pushed up by the engagement arm 21, but since the roller 18 rotates around the pin 17, the wheel 24 moves upwards of the roller 18. When the wheels 24 are rolled inside the equipment chamber 3 along with the movement and the reverse rotation of the wheels 24 is prevented by a wedge-shaped wheel stop or the like, the roller 18 can be pushed upward, that is, the shutter plate 12 can be held open. It is possible to inspect the inside of the disconnection section easily and safely. Further, if the center of gravity of this tool is within the range of the contact portion between the engaging arm 21 and the floor surface 1 of the wheel 24, it can stand as shown in FIG. It is convenient.

[0012]

[Effect of the device]

 The tool for opening and closing the shutter plate according to the present invention not only allows the shutter plate to be opened and closed safely and easily, and can confirm the operation of the shutter plate, but also holds the shutter plate in the open position. Therefore, the disconnection part can be inspected, and it has practical effects such as a simple structure, low cost, and easy movement and storage.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention. 1A is a side view and FIG. 1B is a front view.

FIG. 2 is an explanatory diagram of an opening / closing operation of a shutter plate according to the above embodiment.

FIG. 3 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 2 ... Closed switchboard 3 ... Equipment room 4 ... Circuit breaker 8 ... Partition 9 ... Disconnector 12 ... Shutter plate 16 ... Operating lever 18 ... Roller 21 ... Engaging arm 22 ... Connection frame 23 ... Axle 24 ... Wheel 25 ... Connection arm 26 … Operation frame

Claims (1)

[Scope of utility model registration request] 1. A tool for opening and closing a shutter plate for shielding the front surface of a disconnection portion provided on a partition wall of the closed switchboard when the breaker housed in the equipment room of the closed switchboard is disconnected. And a pair of operating levers for opening and closing the shutter plate, or an engaging arm for engaging with a roller provided so as to be opposed to the inside of the pair of operating levers, and connecting the engaging arms. A frame and wheels at both ends are rotatably fitted, and an axle shorter than the connecting frame is connected by a connecting arm longer than the radius of the wheel, and at a substantially right angle to the connecting arm at the center of the axle. A tool for opening and closing a shutter plate, characterized in that an operating frame having a length several times as long as a distance between the tip of the engaging arm and the center of the axle is provided.