JP3042345B2 - Operating device for ground switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground switch operating device for preventing erroneous operation and malfunction of a ground switch.

[0002]

2. Description of the Related Art A conventional operation device of a grounding switch has a configuration shown in FIG. In the figure, reference numeral 1 denotes a vertical drive shaft rotatably supported at its lower end by bearing means 2 composed of a thrust bearing or the like, for turning on and off the grounding switch. 3 is a first shaft provided at the tip of the drive shaft 1.
The bevel gear 4 is provided on the drive shaft 1 and has a display plate 5 for displaying an off state and an on state by another mechanism (not shown). The front end of the display plate 5 is exposed, and the front part is rotatable by the bearing means 2. A second bevel gear 6 is provided at the rear end of the operation shaft 5 and is engaged with the first bevel gear 3.

[0003] Reference numeral 7 denotes a cover provided in front of the drive shaft 1 and the operation shaft 5, and 8 denotes a substantially central portion of the cover 7, that is, the operation shaft 5.
The operation hole 9 is formed at a position in front of the display panel 4 of the cover 7.

A shutter 10 has a central portion rotatably supported by a shaft 11, and a lower portion is located in front of the operation shaft 5 and closes an operation hole 8 of a cover 7. Reference numeral 12 denotes a notch formed on the upper right side of the shutter 10, and reference numeral 13 denotes a lock pin which is provided to be movable back and forth and abuts the notch 12.

Next, the operation will be described. The operator stands in front of the cover 7, moves the lock pin 13 backward, disengages from the notch 12 of the shutter 10, rotates the shutter 10 clockwise to open the operation hole 8, and inserts the handle into the operation hole 8. To the front end of the operating shaft 5, rotate the handle to rotate the operating shaft 5, rotate the drive shaft 1 via the second bevel gear 6, and the first bevel gear 3, and turn on the ground switch. , Cut off. At this time, the display plate 4 in the on state or the off state is displayed by another mechanism, and the operator sees the display plate 4 through the see-through hole 9 of the cover 7. After the operation is completed, the handle is removed from the operation shaft 5, the shutter 10 is rotated to the left, the operation hole 8 is closed by the shutter 10, the lock pin 13 is moved forward to make contact with the notch 12, and the shutter 10 , And prevents operation from outside the operation shaft 5 to prevent erroneous operation.

[0006]

In the case of the above-mentioned conventional apparatus, the drive shaft 1 and the operation shaft 5 are supported by bearing means 2 composed of a thrust bearing or the like, so that the structure is complicated. Further, erroneous operation from outside can be prevented by the shutter 10 and the lock pin 13, but the first and second bevel gears 3,
6, the drive shaft 1 is rotated by vibration or the like, which causes a problem that the drive shaft 1 malfunctions. SUMMARY OF THE INVENTION An object of the present invention is to provide an operating device for a grounding switch that can simplify the structure, prevent an erroneous operation from the outside, and prevent an erroneous operation due to vibration or the like, keeping the above points in mind.

[0007]

In order to solve the above-mentioned problems, an operation device for a grounding switch according to the present invention comprises: a lever fixed to a drive shaft having a base for turning on and off the grounding switch; An operating shaft having a rotatable support, a rear end connected to a distal end of the lever, and a handle detachably mounted at the distal end; a cover provided in front of the operating shaft; A moving hole in which the tip of the shaft is movable up and down, a display portion formed at the lower end of the moving hole, an on-state display plate provided at the tip of the operating shaft, and moving to the display portion in the on-state; An off-state display plate that is provided on the operation shaft and moves to the display unit in the off state, and is provided rotatably behind the cover,
A shutter that can be opened and closed, except for the display part of the moving hole, is located in front of the tip of the operating shaft when the upper part is in the off state, and prevents rotation of the operating shaft. An upper edge portion of a notch formed at a position of a display portion of the shutter for abutting and preventing rotation of the operation shaft;
A return spring for urging the shutter in a direction to close the moving hole, and a lock pin that is provided to be movable back and forth and locks the shutter when the moving hole is closed.

[0008]

In the operation device of the earthing switch of the present invention having the above-mentioned structure, the operation shaft is connected to the driving shaft for turning on and off the earthing switch via the lever, so that the operation of the driving shaft is simplified. . In addition, a cover is provided in front of the operation shaft, and a portion other than the display portion of the moving hole of the cover where the tip of the operation shaft moves is closed and opened and closed freely by a rotatable shutter urged by a return spring, and is movable back and forth. Since the lock pin is locked to the shutter when the moving hole of the shutter is closed, the closed state of the moving hole of the shutter is locked, and an erroneous operation from the outside is prevented.

Further, in the off state, the off state display plate moves to the display unit, and in the closed state, a shutter in the closed state is positioned in front of the tip of the operation shaft, and in the on state, the on state display plate moves to the display unit. ,
The tip of the operation shaft abuts on the upper edge of the notch formed at the position of the display portion of the shutter in the closed state, whereby the operation shaft is locked, and malfunction due to vibration or the like is prevented.

[0010]

An embodiment will be described with reference to FIG.
In the figure, reference numeral 14 denotes a drive shaft for turning on / off the grounding switch;
Reference numeral 15 denotes a lever whose base is fixed to the drive shaft 14, 16 denotes a long hole formed at the tip of the lever 15, 17 denotes a rotating shaft that is rotatably supported, and 18 denotes a central portion that is fixed to the rotating shaft 17. It is an operation shaft, which is inclined by 45 ° in the off state, the upper part is located at the front, and a handle 19 is detachably attached to the tip. Reference numeral 20 denotes an in-state display plate superimposed on the inclined surface at the tip of the operation shaft 18.

Reference numeral 21 denotes an insertion rod provided at the rear end of the operation shaft 18, which is inserted into the elongated hole 16 and connects the front end of the lever 15 to the rear end of the operation shaft 18. Reference numeral 22 denotes an L-shaped support bracket, one of which is attached to the front surface of the central portion of the operation shaft 18 by a screw 23; 24, the other half of the support bracket 22; The bent portion 26 is a cut-off state display plate superimposed on the bent portion 25.

Reference numeral 27 denotes a cover provided in front of the operation shaft 18, and reference numeral 28 denotes a vertical movement hole formed in the cover 27, and the tip of the operation shaft 18 moves vertically. 2
Reference numeral 9 denotes a display unit formed at the lower end of the moving hole 28, and reference numeral 30 denotes a horizontal locking hole formed on one side of the moving hole 28.

Reference numeral 31 denotes a shutter located behind the cover 27. The lower portion is rotatably supported by bolts 32, the upper portion is located in front of the distal end of the operation shaft 18, and the portion other than the display portion 29 of the moving hole 28 is provided. It is openably closed. 33
Is a locking rod provided on the shutter 31, and 34 is a shutter 3
The cutout state display plate 26 is located below the upper edge 35 of the cutout 34, which is a cutout formed at the position of the display section 29 of the one moving hole 28. A return spring 36 is provided on one side of the lower end of the shutter 31 to urge the shutter 31 in a direction to close the moving hole 28 and to move the locking rod 33 to the moving hole 28.
The other side is kept closed. A lock pin 37 is provided so as to be movable back and forth, and is removably engaged with the other end of the lower end of the shutter 31.

Next, the operation will be described. The solid line in FIG. 1 shows a state in which the closed state of the moving hole 28 of the shutter 31 and the closed state of the grounding switch are locked, the operation shaft 18 rotates clockwise, and the drive shaft 14 rotates counterclockwise through the lever 15. , An off-state display plate 26 is located on the display unit 29, and indicates the off-state of the grounding switch.

Further, the biasing force of the spring 36 causes the shutter 31 to rotate clockwise, and the locking rod 33 of the shutter 31
8, the shutter 31 closes the moving hole 28, the lock pin 37 moves forward and locks on the other side of the lower end of the shutter 31, and the closed state of the moving hole 28 of the shutter 31 is locked. This prevents erroneous operation from the outside.

The operation shaft 18 is provided behind the shutter 31.
When the drive shaft 14 attempts to rotate in the direction of the two-dot chain line arrow due to vibration or the like, that is, in the clockwise direction due to vibration or the like, the distal end of the operation shaft 18 contacts the rear surface of the shutter 31 and The rotation of the shaft 18 is prevented. That is, the OFF state of the grounding switch is locked, and malfunction due to vibration or the like is prevented.

Next, when turning on the grounding switch, the operator stands in front of the cover 27 and locks the lock pin 37.
Is moved backward to disengage from the other side of the lower end of the shutter 31, and the locking rod 33 of the shutter 31 is moved to the locking hole 30,
The moving hole 28 is opened, the handle 19 is attached to the tip of the operation shaft 18, and the operation shaft 18 is moved downward while holding the handle 19. At this time, the distal end of the operation shaft 18 is
As shown by the two-dot chain line in FIG.

When the handle 19 is removed from the distal end of the operating shaft 18, the shutter 31 rotates clockwise by the urging force of the spring 36, closes the moving hole 28, moves the lock pin 37 forward, and moves the lock pin 37 forward. With shutter 3 closed
1 is locked to the other side of the lower end, and the shutter 31 is locked.
Prevent erroneous operation from outside.

At this time, since the distal end of the operating shaft 18 is located below the upper edge 35 of the notch 34 of the shutter 31, the drive shaft 14 is moved in the direction of the solid arrow due to vibration or the like, that is, in the direction of left rotation. In this case, the tip of the operation shaft 18 comes into contact with the upper edge 35 of the notch 34, and the rotation of the operation shaft 18 is prevented. That is, the ON state of the grounding switch is locked, and malfunction due to vibration or the like is prevented. Next, when the grounding switch is turned off from on, the operation is performed in the reverse of the above operation.

[0020]

Since the present invention is configured as described above, it has the following effects. In the operating device for the earthing switch of the present invention, the operating shaft 18 is connected via the lever 15 to the drive shaft 14 for turning on and off the earthing switch.
The operation of the drive shaft 14 can be simplified. Moreover,
A cover 27 is provided in front of the operation shaft 18, and a portion other than the display portion 29 of the moving hole 28 of the cover 27 in which the distal end of the operation shaft 18 moves is opened and closed by a rotatable shutter 31 urged by a return spring 36. When the movable hole 28 of the shutter 31 is closed, the
1 so that the moving hole 2 of the shutter 31
8 can be locked to prevent external erroneous operation.

Further, in the off state, the off state display plate 26 is moved to the display section 29, and the shutter 31 in the closed state is positioned in front of the distal end of the operation shaft 18.
0 is moved to the display unit 29, and the distal end of the operation shaft 18 is brought into contact with the upper edge 35 of the cutout 34 formed at the position of the display unit 29 of the shutter 31 in the closed state. Locking can be performed, and malfunction due to vibration or the like can be prevented.

[Brief description of the drawings]

1A and 1B are a front view and a right side view of one embodiment of the present invention.

FIGS. 2A and 2B are a front view and a left side view of a conventional example.

[Explanation of symbols]

 Reference Signs List 14 drive shaft 15 lever 18 operation shaft 19 handle 20 on-state indicator 26 off-state indicator 27 cover 28 moving hole 29 display 31 shutter 34 cutout 35 upper edge 36 return spring 37 lock pin

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 33/42 H01H 33/48 H01H 31/02 H01H 31/04 H01H 33/46 H02B 1/14 H02B 1 / 16

Claims (1)

(57) [Claims] 1. A lever having a base fixed to a drive shaft for turning on and off the grounding switch, a central portion rotatably supported, a rear end connected to a tip of the lever, and a handle at the tip. An operating shaft to which the operating shaft is detachably mounted, a cover provided in front of the operating shaft, a moving hole formed in the cover, and a tip end of the operating shaft moving up and down freely; A display portion formed at a lower end portion, an on-state display plate provided at a tip of the operation shaft and moving to the display portion in an on state, and provided on the operation shaft and moving to the display portion in an off state A cut-off state display plate, rotatably provided behind the cover, and openably and closably closed except for the display portion of the moving hole, and an upper portion thereof is located in front of a tip portion of the operation shaft in a cut-off state; A shutter for preventing rotation of the operation shaft; and the operation shaft in an on state. An upper edge portion of a notch formed at a position of the display portion of the shutter, which is in contact with a leading end portion and prevents rotation of the operation shaft; and a shutter provided in the shutter to close the moving hole. An operating device for a grounding switch comprising: a return spring biasing in a direction; and a lock pin provided to be movable back and forth and locking the shutter when the moving hole is closed.