JPH0326749Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention is a drawer-type device that moves between multiple fixed positions, such as the operating position and test position of a drawout-type circuit breaker, and locks at the fixed position. RELATED TO POSITION LOCK DEVICE.

[Prior art and its problems]

A draw-out type circuit breaker is always pushed into the operating position in the switchboard and is automatically connected to the conductor drawn into the switchboard from the busbar at the disconnecting point. Pull it out to the test position and disconnect it from the disconnect section. Therefore, the circuit breaker must accurately stop at a predetermined position and be connected to and disconnected from the power source and load, and must not stop at another position unnecessarily. For this purpose, a position locking device is conventionally provided as shown in FIG. In Fig. 3, the circuit breaker has wheels 2 on the side wall of a box 1 that houses it, and is moved back and forth (left and right in the figure, the same applies hereinafter) on rails 4 provided on the side wall of a switchboard 3, and the box A disconnecting section 5 protruding behind the switchboard 3 connects the busbar (not shown) to the switchboard 3.
The outer conductor 6 is brought into contact with and separated from the outer conductor 6 drawn into the innermost part. 7
A lock plate is provided at the lower part of the panel, and lock holes 7a are provided at the operating position D and the test position T, respectively. The operating lever 8 has one end rotatably supported by an operating shaft 9 provided at the innermost part of the box body 1, is provided along the side wall of the panel 3, and the other end can be operated by the operator's hand from the outside. The locking rod 10 attached to the center thereof is inserted into the locking hole 7a at the operating position D and the test position T.

To move the circuit breaker, that is, the box 1, from the operating position D to the test position T, for example, the other end of the operating lever 8 is pulled up, the lock rod 10 is pulled out from the lock hole 7a, and the box 1 is pulled out in this state. If the operating lever 8 is dropped by its own weight while being pulled out, the lock bar 10 will slide on the lock plate 7, and when the box 1 comes to the test position T, it will fit into the lock hole 7a there and prevent the box 1 from moving. Stop. To push the circuit breaker into the operating position, perform the reverse operation.

When moving the locking device of such drawer-type equipment between the operating position and the testing position, you must pull up the operating lever with one hand and remove the locking bar from the locking plate while moving the box with the other hand. No. However, as the capacity of the device increases, its weight and the operating force of the disconnecting section increase in proportion to the capacity, making it difficult and even dangerous to operate it with one hand and move it with the other. There is.

[Purpose of invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a position locking device for a drawer-type appliance, which simplifies the operation of the locking device and does not require operation of the locking device while the drawer-type appliance is being moved.

[Key points of the idea]

The present invention is a locking device for a drawer-type device that moves along the side wall of a switchboard, inserts a locking rod into a locking hole in a locking plate provided in the panel, and stops at the stop position. a lock lever which is rotatably supported by the box housing the device and has a locking rod attached thereto, a guide frame which linearly guides the locking rod, and an intermediate portion whose one end is rotatably supported by the box. A pin that engages with the lower surface of the lock lever is provided near one end, a roller is provided near the other end, an operating lever that is rotatably operated at the other end, and an operating lever that is rotatably supported by the box body at one end and the other end is provided with a roller. is rotatably attached to the operating lever and holds the other end of the operating lever in a rotational position above or below a horizontal position; It is equipped with a cam that comes into contact with a roller and pushes down the operating lever near the locking position.The operator simply pulls up the operating lever, pulls up the locking lever, and pulls out the locking rod from the locking hole. By moving the box without touching it, you can use this movement force to operate the control lever with the cam,
The idea is to use a reversing mechanism to hold this operating lever in that position so that it can be automatically locked in the next normal position.

[Example of idea]

The drawer-type circuit breaker to which the present invention is applied is housed in the box 1 and moves back and forth on the rails provided on the side wall of the switchboard 3, which is similar to the conventional circuit breaker shown in Fig. 3. Illustrations and explanations are omitted, and only the periphery of one embodiment of the position locking device is shown in FIG.
This will be explained in detail based on FIG. In FIGS. 1 and 2, a lock plate 7 is provided at the bottom of the board,
This lock plate 7 is provided with a lock hole 7a at a position where the box 1 is to be stopped, as in the conventional case. The operating lever 8 is also rotatably supported by an operating shaft 9 provided on the box body 1 like the conventional one, but a roller 11 is attached to the operating lever 8 on the side wall side of the panel 3, An engagement pin 8a protrudes from the body 1 side. One of the main points in which this device differs from conventional devices is that the lock rod 10 is not directly attached to the operating lever 8, but is provided parallel to this operating lever 8, and is attached to the locking lever 12 that is operated by the operating lever 8. The locking rod 10 is attached by a pin 12a and is biased downward by a spring 13.
The lock lever 12 is supported by an operating shaft 9 that supports the operating lever 8, and an engaging pin 8a is engaged with a notch 12b on the lower side thereof. Therefore, the lock lever 12 rotates together with the operating lever 8 when the operating lever 8 is pulled up, but becomes free when the operating lever 8 is pushed down. 14 is a guide frame for the operating lever 8, and 15 is a guide frame for linearly guiding the lock rod 10, both of which are fixed to the box body 1.
Another point in which this device differs from conventional devices is that the operating lever 8 is supported by a reversing mechanism 16 and stops at approximately the same position whether the operating lever 8 is pulled up or pushed down. The reversing mechanism 16 for this purpose includes a reversing lever 17 whose one end is rotatably supported by the box body 1 via the guide frame 14 and whose other end is rotatably attached to the operating lever 8. Reversing spring 1 installed to surround
It is a normal one consisting of 8. Another point that differs from conventional ones is a cam 20 fixed to the side wall of the switchboard, and when moving the box 1, this cam 20 guides the roller 11 to guide the operating lever 8.
Automatically presses down.

Assume that the circuit breaker is now in operating position D and is pulled out to test position T. When the operator pulls up the operating lever 8 as shown in FIG.
a pushes the lock lever 12 upward, and the lock rod 10 is pulled out from the lock hole 7a. At this time, the reversing mechanism 16 is reversed from the position shown by the chain line in FIG. 1 to the position shown by the solid line (shown by the broken line because it is on the opposite side of the lever 8), and stops the operating lever 8 at the almost raised position. Therefore, the operator can pull out the box 1 by placing both hands on the box 1. When the box 1 approaches the test position, the roller 11 is guided by the cam 20 and pushes down the operating lever 8 to the position shown by the chain line. At this time, the lock lever 12 becomes free, so the lock rod 10 slides on the lock plate 7 and fits into the lock hole 7a by its own weight and the bias of the spring 13, thereby stopping the box body 1. By this time, the reversing mechanism 16 has been reversed as shown by the chain line and holds the operating lever 8 in a depressed state. By repeating the same operation as described above, it is possible to further pull out the box 1 and stop it at the outer position, or conversely push it into the operating position D.

As described above, when the lock rod 10 moves up and down, it is linearly guided by the guide frame 15, so that it can be accurately inserted into the lock hole.

[Effect of idea]

As described above, with the position locking device for drawer-type equipment according to the present invention, the operator simply pulls up the operating lever to release the lock, and then uses the moving force of the box body to operate the operating lever with the cam. The operating lever is held in that position by a reversing mechanism and automatically locked in the next position, so the operator can focus all his efforts solely on moving the box.
The effect is great because it allows the movement of drawer-type equipment that has a large capacity, weight, and large operating force at the disconnecting section without difficulty.

In addition, the lock rod 10 is linearly guided by the guide frame 15 and is not directly connected to the operating lever, but semi-coupled via the lock lever, so that it is not affected by the rotational movement of the operating lever. The lock rod can now be moved linearly, which allows the lock rod to be fitted into the lock hole relatively tightly without making the fitting dimensions of the lock hole and lock rod any looser than necessary. becomes possible. This reduces the play of the drawer-type device in the lock position (play in the stop position), reducing the impact force that the device receives in the event of a short-circuit accident in the operating position, and thus improving safety. .

[Brief explanation of the drawing]

1 and 2 show an embodiment of the position locking device for a draw-out type circuit breaker according to the present invention, FIG. 1 is a side view, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a conventional locking device. It is a side view showing an example of a drawer type circuit breaker. 1... Box housing the circuit breaker, 3... Switchboard,
7...Lock plate, 7a...Lock hole, 8...Operation lever, 11...Roller, 10...Lock rod, 1
2...Lock lever, 16...Reversing mechanism, 20...
…cam.

Claims (1)

[Scope of utility model registration request] A locking device for a drawer-type device moves along the side wall of a switchboard, inserts a locking rod into a locking hole in a locking plate provided in the panel, and stops at the stop position. A lock lever which is rotatably supported by the housing box and has a locking rod attached thereto, a guide frame which linearly guides the locking rod, and one end of which is rotatably supported by the box and is located near one end of the intermediate portion. A pin that engages with the lower surface of the lock lever is provided with a roller near the other end, and an operating lever whose other end is rotatably operated, and one end of which is rotatably supported by the box and the other end of which is connected to the operating lever. a reversing mechanism that is rotatably attached to the control lever and holds the other end of the operating lever in a rotational position above or below a horizontal position; A position locking device for a drawer-type device, comprising: a cam for pushing down the operating lever near the locking position.