JPH0545044Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a voltage detection grounding device that has the functions of both a voltage detection device for confirming the non-voltage state of a live part and a grounding device for performing grounding operations.

B. Summary of the invention The present invention is a voltage detection grounding device that detects the voltage of a live part and then grounds it, in which the voltage detection device is detachably attached near the live part, and the grounding device is detachably attached to the voltage detection device. By installing the grounding device in such a way that it cannot be grounded unless it is done through a voltage detection device, it is possible to prevent the grounding operation from being performed until the non-voltage state of the live parts has been confirmed with the voltage detection device. This prevents grounding operations from being performed in this state.

C. Conventional technology The conventional disconnecting section and voltage detection grounding device are shown in Figures 6 to 9.
As shown in the figure. Figure 6 is a vertical side view of the disconnecting section, Figure 7 is a front view of the disconnecting unit, Figure 8 is a vertical side view showing how the voltage detector is installed, and Figure 9 is a vertical side view showing how the grounding device is installed. It is a diagram.

As shown in FIGS. 6 and 7, the epoxy resin 2 serving as an insulating member covering the live part 1 is extended in the horizontal direction from the end of the live part 1, forming a substantially cylindrical mounting part 3. ing. The mounting part 3 is attached to pass through a partition plate 4 of the switchboard, and a ring contact 6 is fitted into a notch 5 formed in the charging part 1 inside the mounting part 3. The outer peripheral surface of the mounting portion 3 is covered with a conductive ground layer 7.

As shown in FIGS. 8 and 9, a voltage detection rod or a grounding rod is inserted into the ring contact 6 to perform voltage detection and grounding. As shown in FIG. 8, the voltage detection device 8 includes voltage detection rods 9a and 9b, voltage detection terminals 10, an insulating handle 11, a display section 12 that displays the presence or absence of voltage at the charging part, and a voltage detection terminal 10. Electric terminal 1
0 and the display section 12, and a cylindrical guide 14 with a bottom. Handle 1
1, fit the guide 14 to the outside of the mounting part 3, and fit the voltage detection terminal 10 to the ring contact 6.
will be displayed.

As shown in FIG. 9, the grounding device 15 includes a grounding rod 16, a grounding terminal 17, and an insulating handle 1.
8, a bottomed cylindrical guide 19, and a ground terminal 17.
It consists of a lead 20 etc. that connects to the ground. By grasping the handle 18, fitting the guide 19 to the outside of the mounting portion 3, and fitting the grounding terminal 17 to the ring contact 6, the charging portion 1 is grounded via the grounding terminal 17 and the lead 20.

Therefore, the grounding operation by the grounding device 15 is required to be performed after confirming the non-voltage state of the charging unit 1 by the voltage detection device 8. This is to prevent accidents.

D Problems to be solved by the invention However, since the voltage detection device and the grounding device are installed separately in the installation part of the disconnecting section, the grounding operation may be performed in the wrong order before the voltage detection operation, resulting in an electric shock accident. There is a risk that

Therefore, an object of the present invention is to provide a voltage detection grounding device that solves such problems.

E Means for solving the problem The structure of the present invention to achieve this purpose is as follows:
A ring contact is fitted into a notch formed in the live part, and an insulating member that covers the live part is made to protrude from around the ring contact in a substantially cylindrical shape to form a mounting part,
In a voltage detection grounding device that is attached to the installed part to detect voltage and ground the live part, the voltage detection device that is installed inside the installed part and the grounding device that is attached to the installed part via the voltage detection device perform voltage detection. The voltage detection device constitutes a grounding device, and includes a cylindrical guide that is detachably attached to the outside of the attachment section, an insulating tube that is detachably attached to the inside of the attachment section and coupled to the guide, and an insulating tube that is attached to the guide. It consists of a voltage detector and a voltage detection terminal that is attached to the tip of the insulating tube and is connected to the voltage detector and comes into contact with the ring contact when the insulating tube is attached.The grounding device is an insulating sleeve that is attached to the inside of the insulating tube. and a grounding rod which is movably provided in an insulating sleeve, has a distal end that can be fitted into and detached from a ring contact, has a large diameter section near the distal end, and is grounded near the base end; A handle that is attached to the base end and has an insulating property, a stopper whose central part is rotatably supported near the tip of the insulating sleeve, and one end of the stopper that is fixed in one direction to prevent movement of the large diameter part. When the insulating sleeve is installed inside the insulating cylinder, the other end of the stopper is pushed against the inner surface of the insulating cylinder, and the movement of the large diameter part is released from being blocked. Features.

F Effect First, when the voltage detection device is attached to the attachment part of the disconnecting part, the voltage detection terminal comes into contact with the ring contact, and the voltage detector connected to the ring contact displays the presence or absence of voltage in the live part.

After confirming that there is no voltage on the live parts, attach the grounding device to the voltage detection device and push in the grounding rod. When the tip of the grounding rod fits into the ring contact, the live part is grounded via the grounding rod.

The grounding rod is normally locked by a stopper attached to an insulating sleeve, and is unlocked only when the grounding device is attached to the attachment part via a voltage detection device. Therefore, voltage detection will necessarily be performed before the grounding operation.

G. Embodiments Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

The structure of the voltage detection grounding device is shown in FIGS. 1 to 3.
The voltage detection grounding device includes a voltage detection device that is detachably attached to a mounting portion, and a grounding device that is detachably attached to the voltage detection device.

First, the voltage detection device will be explained. As shown in FIG. 2, the voltage detection device 25 includes a cylindrical guide 26 that is detachably attached to the outside of the attachment section 3, and a cylindrical guide 26 that is coupled to the guide 26 and detachably attached to the inside of the attachment section 3. The installed insulating tube 27, the voltage detector 29 attached to the guide 26 via the frame 28,
It consists of a voltage detecting terminal (not shown) that is provided at the tip of the insulating tube 27 and is connected to the voltage detector 29 and comes into contact with the ring contact 6 when the insulating tube 27 is installed in the mounting section 3. In this embodiment, the voltage detection devices 25 for three phases are integrally connected via the frame 28.

Next, the grounding device will be explained based on FIGS. 3a and 3b. The grounding device 43 includes an insulating sleeve 30 whose right end in FIG. A grounding rod 33 is formed by connecting a ring contact 6 with a detachable contact 31 and forming a large diameter portion 32 on the contact 31, and a grounding rod 33 having one end connected near the base end of the grounding rod 33 and the other end The cable 34 is grounded via a grounding fitting 38, and the insulating handle 37 is connected to the base end of the grounding rod 33 via an L-shaped slit 35 and a pin 36, as shown in FIG. 1b.
A pair of stoppers 40 are attached near the tip of the insulating sleeve 30 so that the center part thereof can rotate around a pin 39, and one end of the stopper 40 urges the stopper 40 in a direction in which it is pressed against the ground rod 33. It is composed of a spring (not shown). The stopper 40 is provided between a positioning member 41 fixed to the insulating sleeve 30 and a pair of support plates 42 fixed in parallel to each other between the insulating sleeve 30 and the insulating sleeve 30 . This grounding device 43 is also provided for three phases similarly to the voltage detection device 25.

Next, the operation of such a voltage detection grounding device will be explained.

First, as shown in FIG. 2, the voltage detection device 25 is mounted on the mounting section 3. Then, the voltage detector terminal (not shown) comes into contact with the ring contact 6, so the voltage detector 29
is electrically connected to the charging section 1, and when there is a voltage in the charging section 1, the voltage detector 29 operates and displays the display with sound and light.

After confirming that there is no voltage in the charging section 1, the grounding device 43, which has a handle 37 coupled to the grounding rod 33, is attached to the voltage detection device 25. At this time, the voltage detection device 25
The grounding device 43 must be installed with the positioning member 41 tilted so that the positioning member 41 fits into the recess 44 formed at a position symmetrical to the axis of the ground (see Figures 1a and 1). (See Figure 4). When the grounding device 43 is attached, the other end of the stopper 40 is pushed against the inner circumferential surface of the insulating cylinder 27, as shown in FIG. 4, and rotates against the biasing force of a spring (not shown). That is, the grounding rod 33, which could not be moved relative to the insulating sleeve 30 because the large diameter portion 32 hits one end of the stopper 40, becomes movable by the rotation of the stopper 40. Therefore, when the handle 37 is grasped and the grounding rod 33 is pushed, the tip of the grounding rod 33, which was located at the position of the imaginary line in FIG. When fitted, the charging section 1 is grounded via the ground rod 33 and cable 34.

When the grounding operation is completed, remove the grounding rod 33 from the ring contact 6, and connect the grounding device 43 to the voltage detection device 2.
Remove from 5. Then, the stopper 40 rotates due to the action of a spring (not shown), and the insulating sleeve 3
Movement of the ground rod 33 relative to zero is prevented. After this, the voltage detection device 25 may be removed from the mounting portion 3.

If you attach the grounding device 43 to the attachment part 3 in the wrong order first, as shown in FIG. The large diameter portion 32 is not pressed in the opposite direction, and movement of the large diameter portion 32 is therefore prevented by one end of the stopper 40. That is, it is not possible to ground the charging section 1 by pushing in the grounding rod 33. This means that the voltage detection device 25 is attached to the mounting part 3.
The grounding device 43 cannot be attached and grounded until after the voltage detection is carried out by attaching the voltage detection device 43, which means that the order of voltage detection and grounding is inevitably determined.

H. Effect of the invention As explained above, according to the voltage detecting grounding device according to the present invention, the stopper is released and the grounding rod cannot be pushed in only when the grounding device is attached after the voltage detecting device is attached to the attachment part. Therefore, voltage detection must be performed before grounding the live parts. In the past, the order in which electrically charged parts were inspected to confirm safety and then grounded was relied solely on the worker's consciousness, which could lead to accidental electric shocks, but this invention has improved the inspection method. Electric grounding equipment is safe as there is no risk of getting the order wrong.

[Brief explanation of the drawing]

Figures 1 to 5 relate to an embodiment of the voltage detection grounding device according to the present invention, in which Figure 1a is a front view, Figure 1b is a side view, Figure 1c is a plan view, and Figure 2 is a disconnection section. Side view showing the state where only the voltage detection device is attached, Figure 3a
is a front view of the grounding device, Fig. 3b is a plan view of the grounding device, Fig. 4 is an explanatory diagram showing the grounding state, Fig. 5 is an explanatory diagram showing the state where grounding is impossible, and Figs. 6 to 7. 6 is a vertical side view, FIG. 7 is a front view, FIG. 8 is a vertical side view showing a conventional voltage detection device installed, and FIG. 9 is a conventional grounding device installed. FIG. 1... Live part, 2... Epoxy resin, 3... Mounting part, 5... Notch part, 6... Ring contact,
25... Voltage detector, 26... Guide, 27... Insulating cylinder, 29... Voltage detector, 30... Insulating sleeve,
31...Contact, 32...Large diameter portion, 33...Ground rod, 34...Cable, 37...Handle, 40...
Stoppa, 43...Grounding device.

Claims (1)

[Scope of Claim for Utility Model Registration] A ring contact is fitted into a notch formed in a live part, an insulating member that covers the live part is protruded from around the ring contact in a substantially cylindrical shape to form a mounting part, and the mounting part is mounted. In a voltage detection grounding device that is attached to a part and performs voltage detection and grounding of a live part, a voltage detection device that is attached to the inside of the installed part and a grounding device that is attached to the installed part via the voltage detection device perform voltage detection and grounding. The voltage detection device consists of a cylindrical guide that is detachably attached to the outside of the attachment section, an insulating tube that is detachably attached to the inside of the attachment section and coupled to the guide, and an insulating tube that is attached to the guide. It consists of a voltage detector and a voltage detection terminal that is attached to the tip of the insulating tube, is connected to the voltage detector, and comes into contact with the ring contact when the insulating tube is installed, while the grounding device is installed inside the insulating tube. an insulating sleeve, a grounding rod that is movably provided within the insulating sleeve, has a distal end that can be fitted into and detached from a ring contact, has a large diameter section near the distal end, and is grounded near the proximal end; and a grounding rod. a handle that is attached to the proximal end of the insulating sleeve and has an insulating property, a stopper whose central part is rotatably supported near the tip of the insulating sleeve, and one end of the stopper that is fixed so as to prevent movement of the large diameter part. By installing an insulating sleeve inside the insulating tube that urges rotation in the direction, the other end of the stopper is pushed against the inner surface of the insulating tube, and the spring stops blocking the large diameter portion. Voltage detection grounding device.