JP2000340073A - Grounding confirmation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an erroneous operation of a disconnector during the mounting of a grounding fitting in the grounding for work with a grounding tool and to enhance the safety of a human body and facilities. SOLUTION: This grounding confirmation device has an output shaft 5 rotated by the drive of a cylinder and a rocking member 6 connected to the output shaft 5 and rocked by the rotation of the output shaft 5, is installed in a disconnector for carrying out making and breaking operations through operational connecting parts 7 by the rocking of the rocking member 6. This device has a stopper 14 fixed to one of the operational connecting parts 7, and a grounding earth conductor 19 arranged in the vicinity of the operational connecting part 7, and when grounding fittings 20 are mounted to the grounding earth conductor 19 in the grounding for work, the stopper 14 is abutted on the grounding fittings 20 so that the rotation of the output shaft 5 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground checking device capable of easily checking a working ground in response to a power outage at a power plant, a substation or a switchyard.

[0002]

2. Description of the Related Art Generally, in order to ensure the safety of personnel and equipment during power outage work such as inspection of equipment at a substation, grounding for work is always required. When a working ground is attached to a substation where the charged part is exposed, there are two types of attaching methods: mechanical grounding with a grounding disconnector and working grounding with a grounding tool.

[0003] The mechanical grounding by the grounding disconnector is a method in which a switch is turned on by opening a line and grounding is automatically turned on. In addition, for work grounding with the above-mentioned grounding tool, after the line is opened, a grounding metal that is electrically connected to the line is attached to a grounding ground conductor installed in the substation, and the grounding metal is connected to the grounding metal. And grounding via a ground conductor.

[0004]

The mechanical grounding by means of the above-mentioned grounding disconnector has no problem because it takes into account the electrical and mechanical interlocking conditions. Since there is no electrical or electrical interlock device installed, the grounding bracket can be attached and detached at any place, but on the other hand, when the disconnector is operated, power is erroneously transmitted to the grounded line, and the substation Power outages could cause supply disruptions and could result in personal injury.

The present invention has been made in view of the above-mentioned circumstances, and in work grounding using a grounding tool, a grounding check which prevents erroneous operation of a disconnector when mounting a grounding bracket and enhances safety of persons and equipment. It is intended to provide a device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an invention according to claim 1 includes an output shaft that is rotated by driving a cylinder, and an output shaft that is connected to the output shaft and rotates the output shaft. A disconnecting member having an oscillating member that oscillates and an operation connecting portion operatively connected to the oscillating member, and performing an on / off operation via the operation connecting portion when the oscillating member swings. A grounding confirmation device provided in the vessel, for confirming working grounding, comprising: a stopper fixed to the operation connection portion; and a grounding earth conductor arranged near the operation connection portion, When a grounding metal is attached to the grounding ground conductor during work grounding, the stopper comes into contact with the grounding metal to prevent rotation of the output shaft.

According to the first aspect of the present invention, when the grounding metal is attached to the grounding ground conductor in working grounding, the stopper comes into contact with the grounding metal to prevent rotation of the output shaft, thereby grounding. Only after the grounding metal has been removed from the grounding conductor, it becomes impossible to operate the disconnector. Thereby, it is possible to prevent erroneous operation of the disconnector at the time of mounting the grounding bracket.

According to a second aspect of the present invention, in the grounding confirmation device according to the first aspect, the stopper is provided at a mounting position of the grounding metal of the grounding ground conductor via the swinging member and the operation connecting portion by the rotation of the output shaft. A movable mechanism lock plate, wherein the mechanism lock plate has a cutout groove formed on a side corresponding to the grounding ground conductor, and a grounding bracket is provided on the grounding ground conductor in the cutout groove during work grounding. A grounding prevention portion that is attached and covers the grounding ground conductor when the line is energized by the on / off operation of the disconnector is formed integrally with the mechanism lock plate.

According to the second aspect of the present invention, after the output shaft is rotated by the working ground to move the mechanism lock plate to a position corresponding to the grounding conductor, the ground in the cutout groove of the mechanism lock plate is grounded. By attaching the grounding metal to the earth conductor for use, the movement of the mechanism lock plate can be reliably prevented, whereby the rotation of the output shaft can be prevented via the operation connecting portion and the swinging member.

In addition, when the line is energized, the grounding prevention unit covers the grounding earth conductor so that the grounding metal cannot be attached to the grounding earth conductor by erroneous operation. As a result, safety when the line is energized can be improved.

According to a third aspect of the present invention, in the grounding confirmation device according to the first or second aspect, an opening / closing plate capable of opening and closing the cutout groove is attached to the mechanism lock plate, and the opening / closing plate is opened to connect the grounding earth conductor. It is characterized in that a detection means for detecting that the grounding metal fitting is attached, and a display means for obtaining the detection signal and emitting and displaying an electric signal are provided.

According to the third aspect of the present invention, when the grounding bracket is attached to the grounding ground conductor while the opening and closing plate is opened with the working ground, an electric signal is generated and displayed on the display means, thereby displaying the working ground. The operator can easily recognize that there is, and safety during power outage work can be further enhanced. Further, if the detection signal of the detection means is obtained and the electric signal is taken out and used as an interlock for the operation circuit of the disconnecting switch, the erroneous operation of the disconnecting switch can be prevented electrically.

According to a fourth aspect of the present invention, there is provided an output shaft which is rotated by driving a cylinder, and a swing member which is connected to the output shaft and swings by rotating the output shaft. A grounding confirmation device that is provided in a disconnector that performs on / off operations by swinging a moving member and that checks work grounding, wherein a grounding ground conductor is arranged in a swinging locus of the swinging member. When a grounding bracket is attached to the grounding ground conductor during work grounding,
The swinging member abuts on the grounding fitting to prevent the rotation of the output shaft.

According to the fourth aspect of the present invention, when the grounding metal is attached to the grounding ground conductor in working grounding, the swinging member abuts on the grounding metal to prevent the rotation of the output shaft of the cylinder. As a result, the disconnection switch cannot be turned on unless the grounding bracket is removed from the grounding ground conductor as in the first aspect of the invention. Thereby, it is possible to prevent erroneous operation of the disconnector at the time of mounting the grounding bracket.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a first embodiment of a ground checking device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
FIG. 4 is an enlarged view showing a mechanism lock plate of FIG. 1; FIG. 5 is an enlarged view showing a grounding metal fitting of FIG. 1; FIG. 2 is a front view showing a state in which the grounding confirmation device of the first embodiment is energizing the line.

As shown in FIGS. 1 and 2, the disconnector has a housing 1, which is installed on a gantry 2 assembled in a frame shape at a height of about 70 cm by an L-shaped steel angle, An air tank 3 as an air supply source is disposed in the gantry 2. The air tank 3 and the housing 1 are connected through a connection pipe 4, whereby the air in the air tank 3 is supplied to the housing 1 through the connection pipe 4.

Here, an air cylinder (not shown) is housed in the housing 1 and its piston rod is operatively connected to the output shaft 5. This output shaft 5
By operating the air cylinder with the air supplied from the air tank 3, the piston rod is driven to expand and contract and rotate.

A center portion of a swing member 6 is mounted on the output shaft 5, and a lower end of an operation pipe 7 as an operation connecting portion is mounted on both ends of the swing member 6, respectively. . The upper ends of these operation pipes 7 are connected to drive rods 8 shown in FIG. The drive rod 8 is attached to a rotating insulator 9, and the rotating insulator 9 is connected to a blade 11 via a twisting mechanism 10.

Therefore, each operation pipe 7 is provided with the swing member 6
The driving force causes the rotating insulator 9 and the twisting mechanism 10 to twist through the operation connecting means and the driving rod 8 (not shown), whereby the blade 11 is moved to the upper ends of the two supporting insulators 12. The disconnecting switch is turned on and off by being brought into contact with and separated from the fixed fixed contact portion 13.

In the vicinity of the lower end of one of the two operation pipes 7, a mechanism lock plate 14 as a flat plate-shaped stopper is fixed by two U-bolts 15. On the side of the mechanism lock plate 14 which is symmetrical to the side to be attached to the operation pipe 7 and corresponds to a grounding conductor to be described later, three rectangular cutout grooves 16 are vertically arranged for three phases. A rectangular grounding prevention portion 17 is integrally formed below the cutout grooves 16.

On the other hand, from the upper side surface of the gantry 2, the fixing bracket 18 is fixed so as to extend slightly above the housing 1 in the vertical direction and to be disposed near the mechanism lock plate 14. A grounding earth conductor 19 formed by bending both ends of a copper plate is fixed to the mechanism lock plate 14 on the upper side of the fixing bracket 18 by mounting bolts. When mounting the metal fittings, three positioning projections 19a for positioning the grounding metal are fixed at predetermined intervals in the vertical direction for three phases.

The length of the grounding conductor 19 is set to be slightly longer than the range in which the cutout groove 16 of the mechanism lock plate 14 is formed, and the grounding prevention portion 1 of the mechanism lock plate 14 is provided.
It is set slightly shorter than 7. The ground conductor 19 is connected to a ground conductor (not shown), and the ground conductor is grounded.

Therefore, as shown in FIG. 4, at the time of working grounding, the mechanism lock plate 14 moves via the swinging member 6 and the operation pipe 7 by the rotation of the output shaft 5, so that the notch of the mechanism lock plate 14 is cut. While the groove 16 is at the same position (height) as the grounding earth conductor 19, when the line is energized by the operation of the disconnecting switch, the rotation of the output shaft 5 as shown in FIG. 17 is a grounding conductor 19 for grounding
At the same position (height), and covers the grounding earth conductor 19.

Also, as shown in FIGS. 1 and 2, three earthing fittings 20 are attached to the earthing conductor 19 for three-phase operation in the working earth, and these earthing fittings 20 are shown in FIG. Each has a thumbscrew 21 and a moving block 22 which moves in the tightening direction by tightening the thumbscrew 21. By tightening or loosening the thumbscrew 21, the moving block 22 is connected to the grounding conductor 19 for grounding. To the grounding conductor 19
Can be attached to and detached from. One end of a grounding conductor 23 is connected to the grounding bracket 20, and the other end of the grounding conductor 23 is connected to a line-side metal fitting (not shown) attached to the line at the work ground.

Further, although not shown, a pressure sensor as a detecting means is embedded in the grounding earth conductor 19 along its longitudinal direction, and when the grounding fitting 20 is attached to the working ground by the pressure sensor, That effect is detected.

The earth conductor 1 for grounding in the fixture 18
1 and 2, a display unit 24 as a display means is provided below the display unit 9. The display unit 24 has a display lamp (red lamp) 24a for displaying the detection result of the pressure sensor, An indicator lamp (blue lamp) 24b and an electric signal extraction unit are provided. This display lamp 24
a indicates that the grounding member 20 is being grounded when the grounding member 20 is attached to the grounding ground conductor 19, while the display lamp 24b indicates that the grounding member 20 is connected to the grounding ground conductor 19.
Lights when removed from the display to indicate that preparation is complete.

That is, in the working ground, the grounding fitting 2
When 0 is attached to the grounding conductor 19 for grounding, it is detected by the pressure sensor, and based on this detection signal, the indicator lamp 24a is turned on to notify the worker that grounding is being performed. When the grounding bracket 20 is detached from the grounding conductor 19, this is detected by the pressure sensor, and the indicator lamp 24b is turned on based on the detection signal to inform the operator that preparation is completed. Inform. In this case, an electric signal is extracted based on the detection signal and can be used as an interlock for an operation circuit of a disconnector.

In FIGS. 1 and 2, a coupling member 25 for attaching a coupling portion provided at the tip of the operating rod is attached to the front center of the housing 1. The operator can manually rotate the output shaft 5 by inserting the connecting portion of the operation rod and rotating the operation rod.

Next, the operation of the first embodiment will be described.

While the blade 11 is in contact with the fixed contact portion 13 and the line including the disconnector is energized, the grounding prevention portion 17 moves up to the grounding ground conductor 19 as shown in FIG. 19 is covered. In this state, the worker cannot attach the grounding bracket 20 to the grounding ground conductor 19 by erroneous operation, so that safety during energization of the line can be achieved.

Then, in order to set the working ground while the line is energized, air is first supplied from the air tank 3 to the air cylinder in the housing 1, the piston rod is operated, and the output shaft 5 rotates. Then, the swinging member 6 swings 90 degrees, and each operation pipe 7 moves up and down, and this driving force twists the rotary insulator 9 and the twisting mechanism 10 via the operation connecting means (not shown) and the driving rod 8. As a result, the blade 11 separates from the fixed contact portion 13 (the bonded state is released), and the disconnecting switch is turned off.

At the same time, the swinging member 6 swings (reversed) by 90 degrees due to the rotation of the output shaft 6 and the respective operation pipes 7 move up and down, so that the mechanism lock plate 14 descends and the mechanism lock plate 14 Notch groove 16 is at the same position (height) as grounding earth conductor 19
Becomes

Thereafter, each notch 16 of the mechanism lock plate 14 is
The grounding metal fittings 20 are attached to the grounding conductor 19 for grounding in each of the three phases. In this case, the moving block 22 is moved in the direction of the grounding ground conductor 19 by tightening the thumb screw 21, and the moving block 22 is pressed against the grounding ground conductor 19, so that the grounding metal is attached to the grounding ground conductor 19. 20 is fixed. Here, when the moving block 22 is pressed against the grounding earth conductor 19, the side surface of the moving block 22 abuts on the positioning projection 19 a, thereby securely fixing the grounding member 20 to the grounding ground conductor 19.

When the grounding fitting 20 is attached to the work ground, the pressure sensor embedded in the grounding earth conductor 19 detects the tightening pressure and the display is made based on the detection signal. Indicator lamp 2 of unit 24
By lighting 4a, the operator is informed that the grounding is being performed.

Therefore, even if the piston rod of the air cylinder in the housing 1 is operated to rotate the output shaft 5 and move the mechanism lock plate 14, the grounding fitting 20 is moved within the movement range of the mechanism lock plate 14. The rotation of the output shaft 5 can be reliably prevented by the mechanism lock plate 14 being disposed and being brought into contact with the grounding fitting 20.

As a result, it is not possible to operate the disconnector unless the grounding bracket 20 is removed from the grounding ground conductor 19. As a result, it is possible to prevent erroneous operation of the disconnector when the grounding bracket 20 is attached.

As described above, according to the first embodiment, when the grounding bracket 20 is attached to the grounding ground conductor 19 in working grounding, the mechanism lock plate 14 comes into contact with the grounding bracket 20 and the air cylinder is used. By preventing the rotation of the output shaft 5, it is mechanically impossible to operate the disconnector unless the grounding bracket 20 is removed from the grounding conductor 19 for grounding. This can prevent erroneous operation of the disconnector when the grounding bracket 20 is attached. Also,
Obtain the detection signal of the above pressure sensor and take out the electric signal,
If this electric signal is used as an interlock for the operation circuit of the disconnecting switch, it is possible to electrically prevent erroneous operation of the disconnecting switch.

Then, the grounding conductor 1 for grounding is used as the working ground.
By turning on the display lamp 24a of the display unit 24 when the grounding bracket 20 is attached to the mounting 9, the worker can easily recognize that the grounding is for work, and the safety during power outage work is further enhanced. be able to.

When the line is energized, the mechanism lock plate 14
Since the grounding prevention part 17 of the above covers the grounding ground conductor 19,
The grounding bracket 20 is prevented from being attached to the grounding conductor 19 by mistake. As a result, safety when the line is energized can be improved.

Further, a grounding earth conductor 19 is fixed on a fixing member 18 arranged near the mechanism lock plate 14,
By attaching the fixing bracket 18 to the gantry 2, the mounting operation of the grounding bracket 20 can be performed in a state where the worker stands, thereby facilitating the mounting operation.

Since three positioning projections 19a for positioning the grounding bracket 20 on the grounding ground conductor 19 are fixed at predetermined intervals in the vertical direction for three phases, grounding is performed by working grounding. When the grounding bracket 20 is attached to the ground conductor 19 for use, the grounding bracket 20 can be securely fixed.

In the first embodiment, the pressure sensor is used as the detecting means for detecting that the grounding member 20 is attached to the grounding earth conductor 19. However, the present invention is not limited to this. May be used.

Further, in the first embodiment, the rotation angle of the output shaft 5 by the air cylinder is set to 90 degrees, but may be other angles. In short, the output shaft 5 is rotated (reversed) by a predetermined angle, and the disconnector is turned on and off. When the disconnector is turned off, the mechanism lock plate 14 moves and the cutout groove 16 is moved to the grounding conductor 15. It may be moved to the same position (height) as. The same applies to the following second embodiment.

FIG. 7 is an enlarged view showing a second embodiment of the grounding confirmation device according to the present invention, and FIG. 8 is an enlarged view showing a state in which a grounding bracket is attached to the grounding confirmation device of FIG. The same parts as those in the first embodiment will be described with the same reference numerals. The same applies to the following embodiments.

In the second embodiment, as shown in FIG. 7, a mechanism lock plate 30 as a flat plate-shaped stopper is fixed by two U bolts 15 near the lower end of one operation pipe 7. On the side of the mechanism lock plate 30 which is symmetrical to the side where the mechanism lock plate 30 is attached to the operation pipe 7 and which corresponds to the grounding conductor 19, three rectangular cutout grooves 16 are vertically arranged for three phases. Is formed with
Above these notches 16, a rectangular grounding prevention portion 17 is integrally formed. .

A saw-tooth plate 31 as an opening / closing plate is mounted on the front surface of each of the notch grooves 16, and guide rods 32 and 33 are fixed to upper and lower ends of the saw-tooth plate 31, respectively. The vertical movement is guided through the guide blocks 34 and 35. The guide rod 32 includes the guide block 34 and the sawtooth plate 31.
A spring 35 is wound between the spring 35 and the upper end thereof, and the spring 35 biases the sawtooth plate 31 so as to press it downward. That is, the spring 35 urges the saw-tooth plate 31 to close the cutout groove 16 of the mechanism lock plate 30. A pressing rod 36 is fixed to the upper end of the guide rod 32 on the same line as the guide rod 32.

Further, a limit switch 37 as a detecting means is fixed on the upper part of the mechanism lock plate 30, and an operation lever 38 of the limit switch 37 is pushed by the pressing rod 3.
6 are arranged so as to abut. When the pressing rod 36 pushes up the operating lever 38 to operate the limit switch 37, the display lamp (red lamp) 24a of the display unit 24 is turned on.

Next, the operation of the second embodiment will be described.

At the time of work grounding, the notch groove 16 of the mechanism lock plate 14 and the sawtooth plate 31 are at the same position (height) as the grounding ground conductor 19 as shown in FIG.
Becomes Then, the grounding fittings 20 are attached to the grounding ground conductors 19 in the respective notched grooves 16 of the mechanism lock plate 14 for three-phase use. Here, the grounding metal 2 is connected to the grounding ground conductor 19 in the cutout groove 16 of the mechanism lock plate 30.
0, the tip of the grounding bracket 20 is
When the grounding fitting 20 is pushed into the cutout groove 16 while being in contact with the tapered portion 31a of the
1a is pushed, the saw-tooth plate 31 is lifted with respect to the mechanism lock plate 30, and the saw-tooth plate 31 is opened. That is, the grounding fitting 20
Is converted by the tapered portion 31 into a vertically upward force, and the sawtooth plate 31 rises.

At the same time, the guide rod 32 rises while being guided by the guide block 33 against the urging force of the spring 35. As a result, the pressing rod 36 moves upward to push up the operating lever 38 to operate the limit switch 37, thereby turning on the display lamp 24a of the display unit 24. Therefore, by turning on the display lamp 24a,
Inform workers that they are grounded. Here, when the guide rod 32 rises, the guide rod 33 also rises while being guided by the guide block 34. Here, if the detection signal of the limit switch 37 is obtained and the electric signal is taken out and used as an interlock for the operation circuit of the disconnector, the erroneous operation of the disconnector can be prevented electrically.

As described above, according to the second embodiment, when the grounding metal 20 is attached to the grounding earth conductor 19 in working grounding, the grounding metal 20 uses the sawtooth plate 3 as an opening / closing plate.
By opening the limit switch 37 while opening 1 to emit an electric signal and illuminating the display lamp 24 of the display unit 24, the worker can easily recognize that it is a work ground, and during power outage work. Safety can be further enhanced. Other configurations, operations, and effects are the same as those of the first embodiment, and a description thereof will be omitted.

FIG. 9 is a schematic perspective view showing a third embodiment of the grounding confirmation device according to the present invention.

In the third embodiment, an air cylinder is housed in a housing 1 and its piston rod is connected to an output shaft 5.
Operatively connected. By operating the air cylinder, the output shaft 5 is rotated by the expansion and contraction of the piston rod.

A center portion of a swing member 6 is mounted on the output shaft 5, and a lower end of an operation pipe 7 as an operation connection portion is mounted on each end of the swing member 6.
These operation pipes 7 move up and down by the swing of the swing member 6, whereby the disconnecting switch is turned on and off. Further, a grounding earth conductor 19 bent and formed in the same manner as in the first and second embodiments is fixed to the housing 1 in the vicinity of the output shaft 5 and within the swing locus of the swing member 6. .

Therefore, when the grounding bracket 20 is attached to the grounding ground conductor 19 in working grounding, one end of the swinging member 6 abuts on the grounding bracket 20 to prevent the rotation of the output shaft 5 of the cylinder. As a result, the disconnection switch cannot be turned on unless the grounding bracket 20 is removed from the grounding ground conductor 19 as in the first embodiment. This can prevent erroneous operation of the disconnector when the grounding bracket 20 is attached.

[0057]

As described above, according to the first aspect of the present invention, when the grounding metal is attached to the grounding ground conductor in the working ground, the stopper comes into contact with the grounding metal and the output shaft is turned. By preventing the movement, the disconnection switch cannot be turned on unless the grounding metal is removed from the grounding earth conductor. This prevents erroneous operation of the disconnector when the grounding bracket is attached, and enhances the safety of humans and equipment.

According to the second aspect of the present invention, after the output shaft is rotated by the working ground to move the mechanism lock plate to a position corresponding to the grounding conductor, the ground in the notch groove of the mechanism lock plate is grounded. By attaching the grounding metal to the earth conductor for use, the movement of the mechanism lock plate can be reliably prevented, whereby the rotation of the output shaft can be prevented via the operation connecting portion and the swinging member.

When the line is energized, the grounding prevention unit covers the grounding earth conductor, so that the grounding metal cannot be attached to the grounding earth conductor by erroneous operation. As a result, safety when the line is energized can be improved.

According to the third aspect of the present invention, when the grounding bracket is attached to the grounding ground conductor while the opening / closing plate is opened with the working ground, an electric signal is generated and displayed on the display means, so that the working ground can be obtained. The operator can easily recognize that there is, and safety during power outage work can be further enhanced. Further, if the detection signal of the detection means is obtained and the electric signal is taken out and used as an interlock for the operation circuit of the disconnecting switch, the erroneous operation of the disconnecting switch can be prevented electrically.

According to the fourth aspect of the present invention, when the grounding metal is attached to the grounding ground conductor during work grounding, the swinging member comes into contact with the grounding metal to prevent the rotation of the output shaft of the cylinder. Thereby, the same effect as the first aspect of the invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a grounding confirmation device according to the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an essential part perspective view showing an operation unit of the disconnector to which the ground check device of the first embodiment is attached.

FIG. 4 is an enlarged view showing the mechanism lock plate of FIG. 1;

FIG. 5 is an enlarged view showing the grounding metal fitting of FIG. 1;

FIG. 6 is a front view showing a state in which the grounding confirmation device of the first embodiment is energizing the line.

FIG. 7 is an enlarged view showing a second embodiment of the grounding confirmation device according to the present invention.

FIG. 8 is an enlarged view showing a state where a grounding bracket is attached to the grounding confirmation device of FIG. 7;

FIG. 9 is a schematic perspective view showing a third embodiment of the grounding confirmation device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Stand 3 Air tank 4 Connection pipe 5 Output shaft 6 Oscillating member 7 Operation pipe (operation connection part) 8 Drive rod 9 Rotary insulator 10 Twisting mechanism 11 Blade 12 Support insulator 13 Fixed contact part 14 Mechanism lock plate 15 U bolt DESCRIPTION OF SYMBOLS 16 Notch groove 17 Grounding prevention part 18 Fixing metal 19 Grounding conductor 19a Positioning projection 20 Grounding metal 21 Thumb screw 22 Moving block 23 Grounding conductor 24a Display lamp 24b Display lamp 25 Coupling member 26 Operation pipe 30 Mechanism lock plate Stopper) 31 Sawtooth plate (opening / closing plate) 37 Limit switch (detection means) 38 Operating lever

Claims (4)

[Claims] An output shaft that is rotated by driving a cylinder;
A swinging member connected to the output shaft and swinging by the rotation of the output shaft; and an operation connecting portion operatively connected to the swinging member, and the swinging member swings the swinging member. A grounding confirmation device provided on a disconnector that performs an on / off operation via an operation connection portion and for confirming a working ground, wherein a stopper fixed to the operation connection portion and a vicinity of the operation connection portion are provided. And a grounding metal is disposed on the grounding metal. When the grounding metal is attached to the grounding metal in the working ground, the stopper comes into contact with the grounding metal to prevent the output shaft from rotating. A grounding confirmation device, characterized in that: 2. The ground check device according to claim 1, wherein
The stopper is a mechanism lock plate that can be moved to the grounding metal mounting position of the grounding ground conductor via the swinging member and the operation connecting part by the rotation of the output shaft, and the mechanism locking plate is provided with the grounding ground. Notch grooves are formed on the side corresponding to the conductor,
A grounding fitting is attached to the grounding earth conductor in the notch groove at the time of working grounding, and a grounding prevention portion that covers the grounding ground conductor when the line is energized by an on / off operation of a disconnector is integrally formed with the mechanism lock plate. A grounding confirmation device, characterized in that: 3. The grounding confirmation device according to claim 1, wherein an opening / closing plate capable of opening and closing the cutout groove is attached to the mechanism lock plate, and the opening / closing plate is opened, and a grounding metal is attached to the grounding conductor. A grounding confirmation device comprising: a detecting means for detecting the occasion; and a display means for obtaining the detection signal and emitting and displaying an electric signal. 4. An output shaft rotated by driving a cylinder,
A swinging member connected to the output shaft and swinging by the rotation of the output shaft, and provided in a disconnector for performing an on / off operation by swinging of the swinging member, for work grounding; A grounding conductor arranged in a swing locus of the swinging member, and when a grounding bracket is attached to the grounding grounding conductor for work grounding, the grounding bracket is connected to the grounding bracket. A contact member that contacts the swing member to prevent rotation of the output shaft.