JPH0424725Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a locking device for locking the operating device of a switchgear such as a circuit breaker, a disconnector, and a grounding device.

[Prior Art] When performing maintenance and inspection work on switchgear such as circuit breakers, disconnectors, and grounding devices on-site, or when operation is to be suspended for a long period of time, it is necessary to close the switchgear for safety. The operating device is locked in either the open or closed position to prevent the operating device from operating even if an erroneous operation command is given to the operating device.

A locking device that locks an operating device of a switchgear generally includes a locking shaft, a locking lever attached to the locking shaft, and a locking mechanism that locks the locking lever in a locked position. When locking the operating device, move the locking lever to the locked position and operate a part of the locking shaft or the locking pin provided on the locking shaft inside the operating device box. The output system of the operating device is rendered inoperable by engaging a portion of the mechanism, and the locking mechanism then locks the locking lever to hold the locking lever in the locked position. A lock is attached to the locking mechanism to prevent the locking mechanism from being accidentally removed.

6 and 7 show conventionally used locking devices. In these figures, 1 is rotatably and axially displaceably supported by the operating box 2. A lock shaft led out from one side, 3 a lock lever attached to the lock shaft 1,
Reference numeral 4 denotes a locking plate arranged on the side of the lock shaft 1 and fixed to the operating device box 2, and the locking plate 4 is provided with locking grooves 4a and 4b arranged vertically. Reference numeral 5 denotes a rotating plate that forms part of the operating mechanism of the opening/closing device. Grooves 5a and 5b are provided in this rotating plate, and the opening/closing device can be operated by engaging the lock shaft 1 in the grooves 5a or 5b. It can be locked in the open or closed position.

In the above-mentioned locking device, when the operating device is locked by opening the opening/closing device, for example, after opening the opening/closing device and directing the groove 5a toward the locking shaft, hold the locking lever 3 and lock it. The lock shaft 1 is advanced into the operating device box, the tip of the lock shaft 1 is engaged in the groove 5a, and then the lock lever 3 is rotated to lock the locking plate 4 as shown in the figure.
into the groove 4a. In this state, lock lever 3
Insert the shank 6a of the lock 6 into the hole at the tip of the lock 6 and lock it, making sure that the lock lever 3 does not come off the groove 4a. To release the lock, after removing the lock 6, the lock lever 3 is rotated to remove it from the groove 4a, and the lock shaft 1 is lowered and removed from the groove 5a. Next, the locking lever 3 is inserted into the lower groove 4 of the locking plate 4.
b, and the lock 6 is attached to the lock lever 3 to lock the locking device in the unlocked state.

[Problems to be solved by the invention] However, in the above configuration, a considerably large space G1 is required between one side of the operating device box 2 and the adjacent portion as shown in FIG. 7 in order to arrange the locking device. There was a problem of needing it. When installing the control box outdoors, be sure to place the control box with the locking device facing down to prevent rainwater from entering the control box through the hole through which the lock shaft passes. However, there was a problem in that there were restrictions on the mounting direction of the operating device.

An object of the present invention is to provide a locking device for a switchgear operating device that solves the above-mentioned problems.

[Means for solving the problems] The present invention is illustrated in FIGS. 1 to 3 showing one embodiment thereof.
As shown in the figure, an operating device that is supported so as to be able to reciprocate between a locked position for locking the operating device for a switchgear and an unlocked position for releasing the lock, and houses the operating device. A locking shaft 20 led out from one side of the box 10, a locking lever 25 pivotally connected to the locking shaft 20 by a pin 26 extending in a direction perpendicular to the central axis of the locking shaft 20, and a locking shaft 20. It is provided with a locking mechanism that locks the locking lever 25 in the locked position and the unlocked position, respectively. The locking shaft 20 can be positioned in the locked position and the unlocked position by rotating the locking lever within a range that does not protrude outward from the area facing one side of the operating device box. The rotation range is set.

[Operation of the device] With the above structure, the locking lever is rotated within an area facing one side of the operating box, so that the space G2 between the operating box and the adjacent part can be narrowed. .

In addition, with the above configuration, the locking lever will be rotated at an acute angle to one side of the operating box, so there is no need to place the locking lever from one side of the operating box in the middle of the locking lever's rotation path. Even if there is a somewhat protruding part, the lock lever can be operated without any problem. Therefore, it is possible to effectively utilize the space on one side of the operating box where the locking shaft is provided.

Furthermore, if locking and unlocking are performed simply by rotating the locking shaft as described above, the penetrating portion of the locking shaft can be easily made liquid-tight. Therefore, the operating box can be installed in any orientation, and even if the orientation of the operating box is changed, the operability of the locking lever will not be impaired.

[Embodiments] Examples of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 3 show an embodiment of the present invention, and in these figures, 10 is an operator box that houses the operators of switchgear such as circuit breakers, disconnectors, and grounding devices. be. An inspection door 11 is attached to the front of the operation box 10, and the inspection door 11 has a frame 12a.
A small window 12 protruding from the inspection door, and a viewing window 14 for confirming an open/close position display device 13 provided on the operating mechanism from the outside are provided. The small window 12 can be opened and closed,
When manually operating the operating device, a small window 12 is opened and a manual operating handle 16 (see FIG. 3) can be attached to the operating shaft 15 of the operating device inside the operating device box. An output shaft 17 of the operating device is led out from the rear side of the operating device box 10, and this output shaft 17 is connected to an operating shaft of a switchgear (not shown).An outer frame 18 on the front side of the operating device box A wide portion 18a, which is wider than the other portions of the outer frame, is provided on one long side of the outer frame, and a locking shaft 20 is inserted through a bearing portion 19 provided approximately in the longitudinal center of the wide portion 18a. It is provided. An O-ring 21 is disposed between the locking shaft 20 and the bearing portion 19, and the O-ring keeps the penetrating portion of the locking shaft 20 liquid-tight.

As shown in FIG. 4, an L-shaped lock pin 2 is attached to the end of the lock shaft 20 located inside the operating box 10.
2 is provided, and the locking shaft 20 has a locking position where the locking pin 22 is engaged with a part of the operating device to disable the operating device in the operating device box, and a locking position where the locking pin 22 is engaged with a part of the operating device in order to disable the operating device in the operating device box, and a locking position where the locking pin 22 is engaged with a part of the operating device in order to disable the operating device in the operating device box, and a locking position where the locking pin 22 is engaged with a part of the operating device in order to disable the operating device in the operating device box. It is designed to be able to be moved between an unlocked position in which it is released and the operation of the operating device is permitted. In this embodiment, the locked position and the unlocked position are exactly 180 degrees apart, so that the lock shaft 20 can reciprocate within a range of 180 degrees.

The lock shaft 20 is provided so as not to protrude from other members (small window 12, viewing window 14, etc.) arranged on the front surface of the operating device box 10, and the lock shaft 20 is provided outside the operating device box. A locking lever 25 is attached to the outer end thereof.

The locking lever 25 has a U-shaped cross section, one end of which is fitted into the outer end 2 of the locking shaft 20, and the locking lever extends in a direction perpendicular to the axial direction of the locking shaft 20. The lock shaft 2 is secured by the pin 26 passing through the opposing side walls of the lock lever 25 and the lock shaft 20.
It is pivoted to 0. Therefore, the locking lever 25 can be in a state where it is approximately parallel to the front surface of the operating device box 10 as shown by a solid line in FIG. It can be rotated between a diagonally raised position and a raised position.

In this embodiment, the locking lever 25 can be rotated 180 degrees within a range that does not protrude outward from the area facing the front surface of the operation box (within the semicircular range shown by the chain line A in FIG. 1). By making the lock shaft 20
can be placed in a locked position and an unlocked position.

A rectangular locking piece fitting hole 27 (see FIG. 4) is provided at the other end of the lock lever 25, and the lock lever 25 is provided with a rectangular locking piece fitting hole 27 (see FIG. 4).
The wide portion 18a of the front outer frame of the front side outer frame has a portion on both sides of the locking shaft 20 that fits into the locking piece fitting hole 27 of the locking lever 25 when the locking shaft 20 is in the locking position. A locking position side locking piece 28 that can be matched with the locking shaft 20
A locking piece 29 on the unlocked position side that can be fitted into the locking piece fitting hole 27 of the locking lever 25 when the lock lever 25 is in the unlocked position is fixed. The locking pieces 28 and 29 are provided with holes 28a and 29a, respectively, for inserting the lock handle, and when the locking piece 28 or 29 is fitted into the hole 27 of the locking lever 25, the locking piece 28 or 29 is inserted into the hole 28a or 29a. By inserting the claw 30a of the lock 30 into the lock 20 and locking the lock 20 with the key 31, the lock lever 25 can be restrained in the locked position or the unlocked position. In this embodiment, the locking piece 2
8 and 29 and the locking piece fitting hole 27 provided in the locking lever 25, the locking lever is locked with the locking shaft positioned in the locked position and the unlocked position, respectively. A stop mechanism is configured.

FIG. 1 shows the operating device in a locked state. To remove the lock from this state, first lock 30
Remove the lock lever 2 as shown by the chain line in Figure 2.
5 to remove the locking lever 25 from the locking piece 28. Next, the locking lever 25 is rotated counterclockwise to the unlocked position and the locking lever 25 is pushed down toward the operating device box to open the locking piece fitting hole 2 of the locking lever.
7 to fit the locking piece 29 into the hole 29 of the locking piece 29.
Attach lock 30 to a. In this state, the locking pin 22 at the tip of the locking shaft 20 is not engaged with the operating mechanism in the operating device box 10, and the operating device opens or closes the opening/closing device according to the operating signal.

When locking the operating device, first set the opening/closing device to the open state or closed state where it should be locked, remove the lock 30 from the locking piece 29, and then pull up the locking lever 25 to close the locking lever. Rotate clockwise to the lock position. At the locked position, the lock lever 25 is pushed down to fit the locking piece 28 into the locking piece fitting hole 27 of the lever, and the lock 30 is attached to the hole 28a of the locking piece 28. In this state, the locking pin 22 at the tip of the locking shaft 20 engages with a part of the operating device in the operating device box 10, making the operating device inoperable, and an erroneous operation signal causes the output shaft of the operating device to become inoperable. 17 to prevent the opening/closing device from operating.

As described above, in the present invention, since the locking lever 25 rotates within a region that faces one surface of the operating device box 10, the gap G2 between the operating device box 10 and the adjacent portion can be reduced. The lock lever can be operated without any problem even when the lock lever is in use. In particular, lock 3
0 is installed horizontally as shown by the chain line in FIG. 1, the operation of the locking device will not be hindered even if there is no space at all below the operating device box 10.

Since the locking shaft 20 performs only rotational movement, the penetrating portion of the locking shaft 20 can be easily made liquid-tight with the O-ring 21, and even when the locking shaft 20 is arranged vertically, rainwater etc. can be prevented from entering the controller box. Therefore, it becomes possible to arrange the controller box 10 in any direction,
The degree of freedom in designing the installation location of the control box can be increased. Furthermore, the operability of the locking lever is not impaired in any way no matter which direction the operating device box is mounted.

FIG. 5 shows the main part of another embodiment of the present invention. In this embodiment, a spring 32 is fitted in a portion of the lock shaft 20 located outside the operating box.
The locking lever 25 is always urged to lie down toward the operating device box 10 side. With this configuration, the locking lever 25 is always connected to the locking piece 28 or 2.
Since the locking lever 25 is biased to maintain the engaged state with the locking lever 9, it is possible to prevent the locking lever 25 from coming off the locking piece due to its own weight when the locking shaft 20 is disposed downward. With this configuration, the locking lever 25 can be held in the engaged state with any of the locking pieces without attaching a lock.

In the above embodiment, the locking lever 25 is provided with a hole 27 and the locking piece 28 or 29 is fitted into the hole 27, but a groove is provided in place of the hole 27 and the locking piece 28 or 29 is fitted into the hole 27. It is also possible to have a structure in which a stopper piece is fitted.

In the above example, the locking shaft is led out to the front of the operating device box, but it is of course possible to lead out the locking shaft on another side.

As in the above embodiment, the lock shaft 20 is connected to the operating box 10.
When placed near the outer frame portion of the controller, most of the front surface of the controller can be effectively used as a space for arranging other members.

Since the locking lever 25 is operated while being pulled up diagonally, the locking lever can be operated even if there is a member protruding from the front of the operating device box in the middle of the rotation path of the locking lever. It is. Therefore, the space on the surface of the operating device box 10 on which the locking shaft is provided can be effectively utilized, and the operating device can be made smaller.

[Effects of the invention] As described above, according to the invention, since the locking lever is rotated within the area facing one side of the operating box, the space between the operating box and the adjacent part is reduced. can be narrowed. In addition, since the lock lever is rotated at an angle with respect to one side of the control box, there is no problem even if there is a part protruding from one side of the control box in the middle of the lock lever rotation path. The locking lever can be operated without having to worry about it, and the space on one side of the operating box where the locking shaft is provided can be effectively utilized. Furthermore, with this invention, locking and unlocking can be performed simply by rotating the lock shaft, making it easy to ensure liquid tightness at the part through which the lock shaft passes, and allowing the operator box to be installed in any direction. can do.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a top view of the main part of Fig. 1, Fig. 3 is a right side view of Fig. 1, Fig. 4 is a perspective view showing the locking shaft and locking lever used in the embodiment of Fig. 1, and Fig. 5. 6 is a top view showing the main parts of another embodiment of the present invention, FIG. 6 is a front view showing the main parts of a conventional locking device, and FIG. 7 is a right side view of FIG. 6. 10...Controller box, 20...Lock shaft, 22...
Locking pin, 25... Locking lever, 27... Locking piece fitting hole, 28... Locking position side locking piece, 29... Unlocking position side locking piece, 30... Lock.

Claims (1)

[Claims for Utility Model Registration] (1) The operating device is supported so as to be able to reciprocate between a locking position for locking the operating device and an unlocking position for releasing the lock. A locking shaft led out from one side of the stored operating device box, a locking lever pivotally connected to the locking shaft by a pin extending in a direction perpendicular to the central axis of the locking shaft, and the locking shaft a locking mechanism that locks the locking lever in the locked position and the unlocked position, and the locking lever is moved outward from opposing areas on one side of the operating box. An opening/closing device characterized in that the rotation range of the lock shaft is set so that the lock shaft can be positioned between a locked position and an unlocked position by rotating within a range that does not allow the lock shaft to protrude. Locking device for operating device. (2) The opening/closing device according to claim 1 of the utility model registration claim, wherein the lock shaft is provided so as not to protrude from other members arranged on one surface of the operating box. Locking device for device operating device. (3) The locking mechanism includes a groove or a hole provided in the lock lever, and a lock lever that rotates about the pin when the lock shaft is in the lock position. Claims for Utility Model Registration, characterized in that the box body comprises a locking piece provided on the box body so as to fit into the groove or hole when the box body is rotated to a position substantially parallel to one surface. A locking device for a switchgear operator according to item 1 or 2.