JP4716685B2 - Equipment controller - Google Patents

Description

  The present invention relates to an operating device for switching and operating the disconnecting device to three operation positions of “ON”, “OFF”, and “GROUND” for an operating device attached to a main circuit disconnecting device provided in a closed switchboard, for example.

  In the switchboard, a disconnecting switch is connected between the circuit breaker and the main circuit bus, and the disconnecting switch is switched to “ON”, “OFF”, and “GROUND” according to the energized state of the main circuit. At the time of inspection, the circuit breaker separated from the main circuit bus is connected to the ground side via the disconnector, and the controller configured as shown in the skeleton diagram of FIG. It is known (see, for example, Patent Document 1).

  In FIG. 3, 1 is a manual operation handle or an operation shaft that is rotated by a drive motor, 2 is an output shaft arranged in parallel to the side of the operation shaft, and 3 is an on / off switch (not shown). An output lever that is driven to each “ground” operating position, 4 is a crank-type link mechanism that links the operating shaft 1 and the output shaft 2, 5 is an operating lever that is coupled to the operating shaft 1, and 6 is an output shaft. 2 is a driven lever coupled to 2; 7 is an articulated link spanned between the operating lever 5 and the driven lever 6; 8 is a mechanical clutch mechanism interposed between the output shafts 2; It is a stopper that regulates the rotation range of the operation lever 5 corresponding to the operation positions A and B, and after these mechanisms are incorporated in the case, the switchboard is equipped with the switchboard to operate the disconnector. In the illustrated example, the operation positions of the output lever 3 corresponding to the operation positions “ON”, “OFF”, and “GROUND” of the disconnector are indicated by A, B, and C, respectively.

In the above configuration, in order to switch the disconnector to the “ON” and “OFF” operation positions, the operation shaft 1 is rotated clockwise or counterclockwise by the drive motor or manual handle operation, via the link mechanism 4. The output shaft 2 is rotated to switch the output lever 3 to the operation position A or B. On the other hand, when the disconnector is switched from “OFF” to “GROUND” operating position when checking the circuit breaker in the panel, first the clutch mechanism 8 is set to “OFF” and the driving side and the driven side of the output shaft 2 are switched. And the handle attached to the driven side end of the output shaft 2 is manually turned to move the output lever 3 from the B position to the C position. As described in detail in Patent Document 1, the clutch mechanism 8 incorporates a stopper that restricts the rotation range of the output lever 3 and stops the output shaft 2 at the C position. In order to return the circuit breaker to the energized state after the maintenance and inspection of the circuit breaker, the output lever 3 is turned from the position C corresponding to “grounding” to the position B corresponding to “off” by operating the handle of the output shaft 2. The clutch mechanism 8 is returned to the original "continuation" state, and the operation shaft 1 is rotated again from here to move the output lever 3 from B to A so that the disconnector is put into the "ON" operating position. Yes.
Japanese Patent Laid-Open No. 2003-240086

  By the way, the conventional device operating device (Patent Document 1) shown in FIG. 3 has the following problems in terms of structure and operability.

  That is, when operating the operating device, the output lever 3 is stopped and held at the three operating positions A, B, and C corresponding to “ON”, “OFF”, and “GROUND” of the disconnector, so that it corresponds to the A and B positions. In addition to the stoppers 9 and 10 provided on the rotation locus of the operation lever 5, a clutch mechanism 8 is additionally provided in the middle of the output shaft 2, and the stopper is incorporated in the clutch mechanism 8 so that the output lever 3 is brought to the C position. I try to keep it stopped.

  For this reason, the number of parts of the operating device is large, the structure becomes complicated, and the cost increases. Further, when switching to the C position corresponding to “grounding”, the operation procedure for requiring an extra step of “disconnecting” and “continuing” the clutch mechanism 8 is complicated and time-consuming.

  The present invention has been made in view of the above points, and the object thereof is to solve the above-mentioned problems, while eliminating the clutch mechanism equipped in the conventional operating device, simplifying the structure and simplifying the operating procedure, In terms of function, the output shaft of the operating device can be positioned and held at the three operating positions A, B, and C corresponding to the “on”, “off”, and “grounding” of the disconnecting device that is the operated device, and the disconnecting is possible. When the device is returned from the “grounding” to the “off” operating position, the operating unit is prevented from unexpectedly being turned “on” beyond the B position from the C position, and additionally the disconnecting device. In the set state in which is switched to the “grounding” position, shutter means is added to prevent the disconnector from being switched to the “on” and “off” operating positions by operating the operating shaft of the operating device without permission. Providing a low-cost, easy-to-operate and reliable controller that prevents operation errors In the door.

In order to achieve the above object, according to the present invention, three operating positions A, B, and C corresponding to each operating position of the operated device are provided inside the case as an operating device for the device having three operating positions. The output shaft is set in parallel to the side of the output shaft and is connected to the output shaft via the link mechanism. The output shaft is operated via the link mechanism by rotating the operation shaft. In an operating device for a device that switches between A and B and switches between operation positions B and C by manually rotating the output shaft.
The link mechanism includes an operation lever coupled to an operation shaft, a driven lever coupled to an output shaft, and a single link that connects the operation lever and the driven lever. A first connecting pin provided on the operating lever and a pin hole formed at one end of the connecting link are inserted and connected between the connecting link, and the connecting link and the driven lever are connected to the connecting link. A slot formed on the other end and a second connecting pin provided on the driven lever are slidably fitted and connected to each other, and stoppers individually corresponding to the positions A, B, and C are opposed to the link mechanism. It is assumed that the following configuration is provided as a specific mode.
(1) The connecting link is U-shaped, and the elongated hole is formed in a direction along an imaginary line connecting the pin hole on the other end side of the connecting link. And the first connecting pin between the connecting link and the connecting link is set so as to be held by the stopper at a reversal position exceeding the dead point with respect to the line of force applied via the driven lever. The link mechanism is set to be restrained and held at this position by a stopper so as to prevent the output shaft from shifting from the operation position B to A by the rotational force applied to the output shaft with the driven lever as the original clause. .
(2) Further, in order to prevent operation mistakes and improve reliability, the operation end of the output shaft is closed at the operation position of the operation shaft on the operation side end face of the case, and the operation end of the operation shaft is operated at the operation position of the output shaft. And a means for locking the shutter at this position in a state where the output shaft is set to be shifted to the operation position C.

  According to said structure, there exists the following effect. That is, a link mechanism that links the operating shaft and the drive shaft, an operating lever that is coupled to the operating shaft, a driven lever that is coupled to the output shaft, and a connecting link that connects the operating lever and the driven lever. The connection between the driven lever and the connecting link is a long hole, a sliding type turning pair using a connecting pin, and the position A, facing the link mechanism. By providing stoppers corresponding to B and C individually, while eliminating the clutch mechanism equipped in the conventional operating device shown in FIG. 3, the structure is simplified and the operating procedure is simplified. The output shaft of the operating device can be stopped and held at three operating positions A, B, and C. In this case, when the rotational force is applied to the output shaft between the operation positions BC, the connecting pin of the driven lever slides through the long hole of the connecting link. As a result, the articulated link does not interfere with the operating shaft only by swinging around the connecting pin between the connecting link and the operating lever following the movement of the driven lever.

  Further, with respect to the link mechanism described above, at the operation position B, the turning pair between the operation lever and the articulated link is held by the stopper at the reverse position beyond the dead point with respect to the line of action of the force applied via the driven lever. By setting so that the rotation mechanism is applied to the output shaft to rotate it to the A position, the link mechanism remains restrained at the B position and does not move from the B position. As a result, when applying a rotational force to the output shaft and returning it from the operation position C to the B position, it is possible to prevent the malfunction of the output shaft switching from the B position to the A position, thereby improving safety and reliability. To do.

  Furthermore, a sliding shutter that closes the operation end of the output shaft at the operation position of the operation shaft on the operation side end face of the case, and the output shaft is moved to the operation position C at the operation position of the output shaft. By providing locking means for restraining and holding the shutter at this position in the set state, it is possible to prevent an operation error of the operating device and to improve reliability.

  Embodiments of the present invention will be described below based on the examples shown in FIGS. 1 (a) and 1 (b) and FIG. In addition, in the figure of an Example, the same code | symbol is attached | subjected to the member corresponding to FIG.

  In the configuration of the illustrated embodiment, the operation shaft 1 is connected between the base 11a of the box-shaped case 11 and the intermediate frame 11b, the output shaft 2 juxtaposed to the side of the operation shaft 1, and the operation shaft 1 and the output shaft 2 are connected. The link mechanism 4 and the drive motor 13 connected to the operation shaft 1 via the gear mechanism 12 are assembled. Although not shown in the drawings, a switch or a control unit for electrically detecting the operation position of the output shaft 2 is provided. Is used to configure the controller. This operating device is installed in the panel of the switchboard, and the tip flange 2a of the output shaft 2 protruding through the base 11a of the case 11 is connected to the drive shaft of the disconnecting switch (not shown) to operate the operating device. (The details of the operation will be described later.) Switch to the operating position of disconnector “ON”, “OFF”, “Ground”. Note that the rear ends of the operation shaft 1 and the output shaft 2 are provided with pin joints 1a and 2b for connecting a manual operation handle (not shown).

Here, the link mechanism 4 linking the operation shaft 1 and the output shaft 2 includes an operation lever 5 coupled on the shaft of the operation shaft 1, a driven lever 6 coupled to the output shaft 2, and the operation lever 5 . It consists of a U-shaped connecting link 7 spanned between the driven lever 6, the operating lever 5 and the connecting link 7 are connected via a connecting pin 5a, and the connecting link 7 and the driven lever 6 are connected. A long hole 7a formed at the tip of the link (the long hole 7a is formed in a direction along an imaginary line connecting the pin hole on the other end of the link) is fitted with a connecting pin 6a implanted in the driven lever 6. Combined and slidable swivel pairs connected, and three output positions A corresponding to the operation positions of “on”, “off”, and “ground” of the disconnecting device which is the operated device around the output shaft 2 , B, C are set.

  In addition, stoppers 14A, 14B, and 14C are provided on the base 11a of the case 1 in accordance with the movement trajectory of the link mechanism 4 in order to stop and hold the output shaft 2 at the positions A, B, and C in the operation process of the operation device. (See FIG. 1B). Here, the stoppers 14A and 14B are provided to face the positions A 'and B' of the operation lever 5 as shown in the figure, and the stopper 14C is provided to face the position C 'of the driven lever 6. FIG. 1B shows a state in which the output shaft 2 is stopped at the B position (disconnector “OFF”).

  With the above configuration, when the handle is connected to the operation shaft 1 and rotated clockwise, the output shaft 2 rotates clockwise from the B position via the link mechanism 4, and when reaching the A position, the operation lever 5 is stopped. It hits 14A and stops at this position, and the disconnect switch becomes “ON”. Further, when the operation shaft 1 is turned counterclockwise from the A position, the output shaft 2 shifts from the A position to the B position (disconnector “OFF”). When reaching the B position, the operation lever 5 hits the stopper 14B to reach the B position. Stop and prevent further rotation.

  On the other hand, in order to check the circuit breaker in the switchboard, when switching the operating position of the disconnector from “OFF” to “GROUND”, connect the handle to the output shaft 2 and turn it counterclockwise. When 6 moves to the C position and hits the stopper 14C, it stops. In this movement process, since the connecting pin 6a of the driven lever 6 slides in the long hole 7a of the connecting link 7, the connecting link 7 is free to use the connecting pin 5a of the operating lever 5 stopped at the position B 'as a fulcrum. The control lever 5 remains stopped at the B ′ position. When the driven lever 6 reaches the B position in the process of rotating the output shaft 2 clockwise to return it from the C position to the B position, the action line of the force applied in the counterclockwise direction with the driven lever 6 as the original node at this B position. On the other hand, since the connecting pin 5a (rotating pair) between the operating lever 5 and the connecting link 7 is stopped and held by the stopper 14B at the reverse position beyond the dead point, the connecting pin 6a of the driven lever 6 is connected. Even if the link 7 is pressed, the output shaft 2 does not move to the A position beyond the B position, thereby preventing an erroneous operation in which the disconnector is erroneously turned on.

  In order to display the operation states “ON”, “OFF”, and “GROUND” of the disconnecting device with an operating device, in the illustrated embodiment, an arc shape as shown in FIG. A display window 11c-1 having display marks "ON", "OFF", and "GROUND" on the display board 16 opened in the cover 11c of the case 11 corresponding to the operation positions A, B, and C is attached. To display through.

Further, the operating device of the illustrated embodiment includes a shutter 16 on the operation end face side (inside the cover 11c) of the case 11 as means for preventing erroneous operation of the operation shaft and the output shaft. The shutter 16 is guided and supported so that both side edges thereof are slidable in the direction of the arrow P along the guide rail 17, and a knob 16 b on the plate surface of the shutter and an operation window hole 16 a corresponding to the shaft end of the operation shaft 1. , And a stopper piece 16c at the right edge.

The shutter 16 operates as follows. That is, in the state of FIG. 2, the shutter 16 covers the operation ends of the operation shaft 1 and the output shaft 2, and the output shaft 2 stops at the operation position B (solid line state in FIG. 1A), and the display board 15. Is displaying “OFF”. In this state, when the disconnector is turned “ON” or operated from “ON” to “OFF”, the shutter 16 is slid to the right by placing a hand on the knob 16 b , and the axis of the operation shaft 1. end is set to face the operation window hole 16 a, a handle (not shown) to a pin joint 1a of the operating shaft 1 in this state connected to turn the operating shaft 1. In this state, since the shutter 16 covers the shaft end of the output shaft 2, an operation of connecting the handle to the output shaft 2 from the outside and switching to the C position cannot be performed.

  On the other hand, when the operating device is switched to the C position from the state shown in the figure, the shutter 16 is slid to the left to open the end face of the output shaft 2, and the handle is connected to the pin joint 2b of the output shaft 2 for operation. I do. In this state, since the shutter 16 covers the shaft end of the operation shaft 1, the operation shaft 1 cannot be operated by a handle. When the output shaft 2 is turned to the C position and the disconnector is switched to the “grounding” operating position, the display plate 15 is rotated 90 ° counterclockwise from the position of FIG. Moves to the position 15 ′ shown in the figure and faces the stopper piece 16c of the shutter 16 to prevent the shutter 16 from sliding to the right. Therefore, in order to check the circuit breaker of the switchboard, in the state of the disconnector “grounding” in which the operating device is set at the C position, an operation mistake is made to connect the handle to the operating shaft 1 and arbitrarily switch to the B position or the A position. To prevent accidental electric shocks.

  Further, the operating device of the illustrated embodiment employs the following structure as a function-up means for preventing an operation error. That is, a compression spring 2c is inserted between a pin joint 2b provided at the shaft end of the output shaft 2 and the shaft, and the pin joint is normally held at a position floating from the shaft end, and the output shaft 2 is operated by a handle. In this case, the handle connected to the pin joint 2b is pushed in and coupled with the output shaft 2 and then rotated. Further, in addition to this joint structure, the flying height of the pin joint 2b is set on the operation end side of the output shaft 2. A stopper plate 18 that regulates the rotation range of the pin joint by adjusting the position is provided. The stopper plate 18 is supported on the case 11 and is disposed inside the shutter 16. The inner surface of the plate surface is rotated by the pin joint 2 b according to the operation positions A, B, C as shown in FIG. 2. An irregular cross-shaped groove is formed by combining a groove 18A-B for restricting the moving range between A and B and a groove 18C for restricting the moving range to the C position.

  With this structure, when the handle is connected to the operation shaft 1 and the output shaft 2 is switched between A and B, the pin joint 2b of the output shaft 2 can freely move within the range of the groove 18A-B of the restriction plate 18. It can be rotated. On the other hand, when the handle is connected to the pin joint 2b of the output shaft 2 and switched to the C position, the handle is turned unless the handle is pushed in and the pin joint 2b is correctly coupled to the shaft end of the output shaft 2. However, it is blocked by the wall between the grooves 18A-B and 18C of the restricting plate 18 and cannot be turned to the C position, and the restraint of the stopper plate 18 is released by pushing the handle and correctly coupling to the output shaft 2. Thus, switching to the C position becomes possible. Even when the output shaft 2 is returned from the C position to the B position, the switching operation cannot be performed unless the handle connected to the pin joint 2b is pushed in the same manner as described above.

  With the configuration described above, the structure and operation procedure are simpler than the conventional structure shown in FIG. 3 (with a latch inserted into the output shaft), and the controller can be connected to the disconnector without any risk of malfunction or operation error. It is possible to switch to three operation positions A, B, and C corresponding to the operation positions “ON”, “OFF”, and “Ground”.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the operation device by the Example of this invention, (a) is side sectional drawing showing an internal structure, (b) is arrow XX sectional drawing of (a). Front view of essential parts viewed from the case cover side of FIG. Schematic diagram showing the operating mechanism of a conventional operating device

DESCRIPTION OF SYMBOLS 1 Operation shaft 2 Output shaft 4 Link mechanism 5 Operation lever 6 Driven lever 6a Connection pin 7 Connection link 7a Elongate hole 11 Case 14A-14C Stopper 15 Display board 16 Shutter A, B, C Operation position

Claims (2)

An operating device for a device having three operating positions, and an output shaft in which three operating positions A, B, and C corresponding to each operating position of the operated device are set inside the case, and the side of the output shaft Equipped with an operation shaft connected in parallel to the output shaft and linked to the output shaft via the link mechanism, the output shaft is switched between the operation positions A and B via the link mechanism by rotating the operation shaft, and the operation position BC In which switching between them is performed by manual rotation of the output shaft,
An operating lever coupled to the operating shaft; a driven lever coupled to the output shaft;
It is composed of one connecting link connecting the operation lever and the driven lever,
Between the operating link and the connecting link, a first connecting pin provided in the operating lever and a pin hole formed at one end of the connecting link are fitted and connected, and between the connecting link and the driven lever. Is slidably fitted into a long hole formed at the other end of the connecting link and a second connecting pin provided on the driven lever,
An operating device for a device, characterized in that a stopper corresponding to each of the positions A, B, and C is provided facing the link mechanism ,
The connecting link is U-shaped, and the elongated hole is formed in a direction along an imaginary line connecting the pin hole on the other end side of the connecting link.
In the operation position B, the first connecting pin between the operation lever and the connecting link is held by the stopper at a reversal position beyond the dead point with respect to the line of action of the force applied via the driven lever. By setting so that the output lever is prevented from shifting from the operating position B to A by the rotational force applied to the output shaft with the driven lever as the original clause, the link mechanism is moved to this position with a stopper. An operating device of equipment characterized by being restrained and held. 2. The operating device according to claim 1, wherein a sliding shutter that closes the operation end of the output shaft at the operation position of the operation shaft and closes the operation end of the operation shaft at the operation position of the output shaft is provided on the operation side end face of the case. An operating device for an apparatus, comprising means for locking the shutter at this position in a state where the shaft is set to the operation position C.

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