JPH04124726U - Display device for switchgear - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a display device for a switchgear that is easy to see, safe, and easy to design by concentrating two different displays of the number of times the switchgear is opened/closed and the open/closed state in one place. [Structure] Mechanical operation counter 2 that is activated by the rotation of a counter shaft 30 connected to the opening/closing main shaft of the opening/closing device and displays the number of openings/closings from the counter display window 29 of the counter cover 27.
6, and an open/close state display body 32 which is provided with on/off indications 31a and 31b and is movable in conjunction with the rotation of the main shaft, and the display body 32 is directly and integrally attached to the counter shaft 30 within the counter cover 27. At the same time, an opening/closing display window 33 is formed on the counter cover 27 at a position facing the display body 32.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is designed to check the current switching status and current status of switchgear such as circuit breakers and switches. The present invention relates to a display device that displays the number of openings and closings.

0002

[Conventional technology]

Conventionally, in switching devices such as circuit breakers and switches, the current switching status and current In order to display the number of openings and closings from the front of the device, for example, as shown in Figures 5 to 7, A display device is used.

0003 These drawings show the case of a draw-out type circuit breaker, and as shown in Figure 5, On the front plate 2 of the circuit breaker 1, there is a display hole 3 for the number of openings and closings on the upper right side and on the lower right side. A display hole 4 for opening/closing status is provided in each of the holes, and a counter for counting the number of openings/closings is provided opposite to the display hole 3. A mechanical operation counter 5 is arranged to display the number of times the operation is performed, and a mechanical operation counter 5 is arranged opposite to the display hole 5. An open/closed state indicator with an off indication is arranged. In addition, 6 is the rating nameplate, 7 is Handle, 8 is manual trip operation hole, 9 is secondary connection, 10 is interlock lever. be.

0004 The operation count counter 5 and the opening/closing state display body each indicate an opening/closing main that turns on/off the opening/closing element. It operates in conjunction with the rotation of the shaft, and its specific configuration is shown in FIGS. 6 and 7.

[0005] At the tip of the movable plate 11 that rotates up and down by the input coil, there is a plate facing the display hole 4. Then, the opening/closing state display body 12 formed by bending a flat plate is fixed, and a Indications 13a and 13b for on and off are formed.

[0006] The pivot shaft of this movable plate 11 is connected to the opening/closing main shaft via a link, lever, etc. When the closing coil is excited and the closing operation is performed, the movable plate 11 moves upward, that is, as shown in FIG. At the same time, the opening/closing element connected to the main shaft enters and rotates to the position shown in FIG. When the cutoff operation is performed by the spring force of the cutoff spring, the movable plate 11 moves downward, that is, in the At the same time, the opening/closing element performs a cutting operation via the main shaft.

[0007] When the movable plate 11 is turned up and down due to this turning on and off, the display body 12 is turned on and off. Both displays 13a and 13b face the display hole 4, and indicate the open/closed status from the front of the circuit breaker. It is now possible to check. In addition, as shown in FIG. A frame 14 to which parts are attached is arranged in the left and right direction. 14 through a mounting plate 15 so that the operation counter 5 faces the display hole 3. There is.

[0008] At the tip of the movable plate 11, a connecting block 16 is integrated with the display body 12. A spring plate is attached to the end of the semicircular shaft 17 that is fixed and extends to the right from this block 16. 18 is attached to the counter shaft 19 that protrudes to the right from the operation counter 5. A spring hanging plate 21 is attached via the drive lever 20, and both spring hanging plates 18, 2 1 are connected by a tension spring 22.

[0009] Here, in the operation counter 5, the counter shaft 19 is supported by a biasing spring (not shown). is biased to rotate the drive lever 20 upward, and the drive lever 20 is biased. The count is counted up by rotating downward against the counter. It can be displayed from the counter display window 24 of the bar 23. In addition, pull The spring force of the spring 22 is set larger than the spring force of the biasing spring. Also, 25 is a reset knob.

0010 Therefore, when the movable plate 11 is pulled out from the closed state shown in FIGS. 6 and 7, When it rotates downward as shown by the dashed-dotted line in FIG. 7, the connecting block 16, The tension spring 22 is pulled downward via the semicircular shaft 17, and this tension spring force This causes the drive lever 20 to rotate downward, applying rotational force to the counter shaft 19, and opening the counter shaft 19. The number of closes is counted up.

[0011] Thereafter, when the loading operation is performed again, the movable plate 11 rotates to the position shown in the figure and is pulled out. Since the tensile force on the tension spring 22 is removed, the drive lever 20 follows the force. to return to the upper position.

0012

[Problem that the idea aims to solve]

As mentioned above, in conventional display devices, the number of times the switchgear is opened/closed and the state of opening/closing are The state is individually displayed by an independent operation counter 5 and display 12. Because of this, the display positions of the opening/closing count and opening/closing status are scattered, making it difficult to see. There are two display holes 3 and 4 on the front panel 2 to display the number of openings and closings and the opening and closing status. It is necessary to provide

[0013] Furthermore, in this type of switchgear, there are various mechanical drive parts depending on the model. Therefore, when interlocking the operation counter 5 and display body 12 with the main axis, the model The number of opening/closing times and the display position of the opening/closing status will be different each time. It is necessary to think about the layout, which takes time to design. Because it is necessary to match the front and back dimensions to the position of the face plate 2, the structure becomes complicated and There is a problem with economical design. Furthermore, if the front panel 2 is removed during maintenance and inspection of the switchgear, the display body 12 This has the drawback that it is extremely dangerous during on/off operation as it exposes the metal.

[0014] The present invention has been made in consideration of these problems of the conventional technology. The purpose of this is to make it easy to see the number of openings/closings and the opening/closing status. Provides a display device for switchgear that is simple, economical, and can improve safety during maintenance and inspection. It's about doing.

[0015]

[Means to solve the problem]

In order to achieve the above object, in the display device for a switchgear of the present invention, the display device for a switchgear It is operated by the rotation of the counter shaft connected to the opening/closing main shaft of the counter cover. Equipped with a mechanical operation counter that displays the number of openings and closings from the computer display window, and an on/off display. It is equipped with an open/close status display body that moves in conjunction with the rotation of the main shaft, and this display body can be used as a counter. Attaches directly and integrally to the counter shaft inside the cover, and also attaches to the front of the counter cover. An opening/closing display window is formed at a position facing the display.

[0016]

[Effect]

In the above-mentioned configuration, when the opening/closing main shaft rotates when opening/closing the switchgear, the The counter shaft of the connected operation counter rotates, and the display inside the counter cover moves. In other words, at the same time as the rotation, the operation counter starts counting, and the counter cover The number of opening/closing times and opening/closing status are displayed from the counter display window and opening/closing display window respectively. Ru.

[0017]

【Example】

Examples will be explained using FIGS. 1 to 4. In addition, the same symbols as above are the same. 1 or equivalent. In these drawings, the difference from the above is that the number of operation counters that were previously provided individually. and a mechanical operation counter 26 having an opening/closing status display function in place of the opening/closing status indicator. This is because the counter body 28 is housed inside the counter cover 27 and can be used. The counter main body 28 is arranged opposite to the count display window 29 of the counter cover 27. On/off indications 31a, 3 are directly and integrally connected to the square shaft-like counter shaft 30 connected to the 1b is attached, and the counter cover is attached. An opening/closing display window 33 is formed on the bar 27 at a position opposite to the display body 32, and an operation counter 26 is formed. I am trying to configure it.

[0018] Then, the end of the counter shaft 30 led out from the right side of the counter cover 27 is driven. The movable lever 20 is fixed and attached to the movable plate 11 which is connected to the opening/closing main shaft at the same time as in the past. They are connected via a tension spring 22, etc., and the front plate 2 of the circuit breaker 1 has a number of operations. Display holes 34 are transparently provided corresponding to the total number 26.

[0019] Note that the rotation angle of the counter shaft 30 during opening and closing is approximately 90° as shown in FIG. It is set to rotate in the input direction by a biasing spring as in the past, and As shown in FIG. , on two adjacent sides so that both displays 31a and 31b face the display window 33 when shutting off. It is formed.

[0020] Therefore, when the circuit breaker 1 is closed, the counter shaft 30 follows the bias. In order to return to the rotational position shown in FIG. 4, the display body 32 integrated therewith is In this way, the input display 32a is held in a position facing the display window 33, and the input display 32a is held in a position facing the display window 33. When the movable plate 11 is rotated downward by the release operation, the drive lever 20 is pulled. Since it is rotated downward via the spring 22, the counter shaft 30 rotates and the counter At the same time as the counter body 28 performs a counting operation, the display body 32 rotates 90 degrees to display an off display 31. b now faces the display window 33, and both display windows 29 of the counter cover 27, 33, the number of opening/closing times and the opening/closing state are displayed.

[0021]

[Effect of the idea]

Since the present invention is configured as explained above, it achieves the effects described below. do. Directly and integrally displays the opening/closing status on the counter shaft of the operation counter connected to the opening/closing main shaft. Attach the counter display window and opening on the counter cover of this operation counter. The number of opening/closing times and opening/closing status can be displayed from the closing display window, so you can easily The two displays of the number of operations and the open/closed status can be concentrated on the operation counter, which is different from the conventional one. The display position is not dispersed and the display is very easy to read. Only one display hole is required, which is economical.

[0022] Moreover, even if the structure of the mechanical drive section differs depending on the model, the operation count You only need to consider the connection structure between the shaft and the opening/closing main shaft, which simplifies the layout. It is also easy to align the display of both the number of openings/closing times and the opening/closing status with the front panel of the switchgear. , which makes the design easier. Furthermore, even if the front panel of the switchgear is removed during maintenance and inspection, the display remains Since it is built into the counter cover, it is not exposed and is safe for opening and closing operations.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of a display device for a switchgear according to the present invention.

FIG. 2 is a front view of a circuit breaker to which one embodiment is applied.

FIG. 3 is a perspective view of an open/close state display body.

FIG. 4 is a side view of the operation counter.

FIG. 5 is a front view of a circuit breaker to which a conventional display device is applied.

FIG. 6 is a front view of a conventional display device.

FIG. 7 is a cutaway side view of FIG. 6;

[Explanation of symbols]

1 Circuit breaker 11 Movable plate 26 Operation counter 27 Counter cover 29 Counter display window 30 Counter axis 31a, 31b display 32 Open/close status indicator 33 Open/close display window

Claims (1)

[Scope of utility model registration request] 1. A mechanical operation counter that is operated by the rotation of a counter shaft connected to the opening/closing main shaft of the opening/closing device and displays the number of openings/closings from a counter display window of the counter cover, and an on/off display. In the display device for a switchgear, the display device includes an opening/closing state display body that moves in conjunction with rotation of a main shaft, the display body being directly and integrally attached to the counter shaft in the counter cover, and the display body being attached directly and integrally to the counter shaft in the counter cover. A display device for an opening/closing device in which an opening/closing display window is formed at a position facing the display body.