JP2000331574A - Multiple-circuit switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple-circuit switch prohibiting the other maintenance opening/closing contacts from turning on when one maintenance opening/closing contact of multiple maintenance opening/closing contacts is turned on. SOLUTION: Interlock mechanisms 41a to 41e are provided with a lock member 53 provided for individual circuits to interlock between multiple maintenance opening/closing contacts and main circuit opening/closing contacts corresponding to the individual maintenance opening/closing contacts. The interlock mechanism 41a to 41e are provided with a lock link 47 interlocking the other maintenance opening/closing contacts from turning on when either one of the maintenance opening/closing contacts is turned on. The lock 53 and the lock link 47 are operationally associated with a maintenance mechanism operating shaft 42 turning on/off the individual maintenance opening/closing contacts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a multi-circuit switch, and more particularly, to an interlock mechanism of a maintenance mechanism.

[0002]

2. Description of the Related Art Conventionally, as a multi-circuit gas switch, grounding and
In order to improve the safety and reliability of inspection work and the like, a configuration in which a single maintenance terminal is provided for a plurality of main circuits has been proposed. The maintenance terminal and the main circuit are connected or disconnected by the opening and closing operation of a maintenance switching contact provided for each main circuit. One end of each maintenance switching contact is connected to a corresponding main circuit, and the other end is connected to the same maintenance line extending from the maintenance terminal.

Each main circuit is provided with a main circuit opening / closing contact. When the main circuit opening / closing contact is turned on, the corresponding maintenance opening / closing contact cannot be turned on by an interlock mechanism. You. Further, when the maintenance switching contact is turned on, the main circuit switching contact corresponding thereto is disabled by the interlock mechanism, and the grounding / inspection connection cable is connected to the maintenance terminal in this state.

[0004]

However, in the conventional multi-circuit gas switch, a plurality of maintenance switching contacts corresponding to the respective main circuit switching contacts can be simultaneously turned on when the plurality of main circuit switching contacts are open. . For this reason, when a voltage is applied from a maintenance terminal for inspection in a state where a plurality of maintenance switching contacts are simultaneously turned on, the applied voltage is also applied to a customer line not to be inspected. Therefore,
In some cases, it is difficult to determine which of the customer lines is the inspection result of the customer line.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide, when one of a plurality of maintenance switching contacts is turned on, another maintenance switching contact. An object of the present invention is to provide a multi-circuit switch that can be closed.

[0006]

According to a first aspect of the present invention, a plurality of maintenance opening / closing contacts correspond to a maintenance opening / closing contact that has been operated in conjunction with the closing operation of any one of the maintenance opening / closing contacts. The main circuit switching contact and all other maintenance switching contacts that are not closed are locked so that they cannot be closed,
A multi-circuit switch including an interlock mechanism for locking a maintenance switching contact corresponding to the main circuit switching contact so as not to be closed when any one of the main circuit switching contacts is closed. The interlock mechanism includes: a first lock member provided for each circuit for interlocking between a plurality of maintenance switching contacts and a main circuit switching contact corresponding to each maintenance switching contact; And a second lock member for interlocking other maintenance opening / closing contacts that cannot be closed when the contacts are closed, and closing and opening the first and second locking members for opening and closing the respective maintenance switching contacts. The gist is that they are linked to the opening means.

According to a second aspect of the present invention, in the first aspect of the invention, the second lock member and the opening / closing means are interlocked via a maintenance mechanism operation handle. This is the gist.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the first lock member is provided with respect to a maintenance mechanism operating shaft constituting the charging / opening means.
A main operating member movably linked between a non-lockable non-linkage position and a lockable linkage position is connected, and the second lock member is unlocked only when the maintenance mechanism operation handle is inserted. The gist of the present invention is that a maintenance operation member that is movable between a lock position and a lockable lock position is rotatably connected.

According to a fourth aspect of the present invention, in the third aspect of the present invention, an operation lock member protrudes from the maintenance operation member on the side where the maintenance mechanism operation handle is inserted, in proximity to the maintenance mechanism operation shaft. The gist of the invention is that the operation lock member can be operated with a maintenance mechanism operation handle.

According to a fifth aspect of the present invention, in the third or fourth aspect of the invention, the maintenance mechanism operation shaft is rotatable by engaging the maintenance mechanism operation shaft and the maintenance mechanism operation handle. The gist of the present invention is that a non-rotating rotation transmitting means is provided.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the second lock member is provided with a maintenance opening / closing contact. The gist is to provide holding means for holding the locked position in the state and the unlocked position in the maintenance open / close contact open state, respectively.

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, the maintenance operation member is provided movably across a vertical position whose center is located on a vertical line. The gist of the invention is that the means are springs that urge in opposite directions with respect to the vertical position of the maintenance operation member.

According to the first aspect of the present invention, when the maintenance contact corresponding to the main circuit switching contact is turned on when the main circuit switching contact is opened, the first lock member is maintained. In conjunction with the switching means closing means, an interlock is made between the maintenance switching contact operated and the main circuit switching contact corresponding to the maintenance switching contact. In addition, the second lock member interlocks with all other maintenance opening / closing contacts that are not subjected to the closing operation, in conjunction with the maintenance opening / closing contact closing mechanism. As a result, when the maintenance switching contact is turned on, the main circuit switching contact corresponding to the maintenance switching contact and other maintenance switching contacts that are not switched on cannot be closed. Conversely, when the main circuit switching contact is turned on, the maintenance switching contact corresponding to the main circuit switching contact cannot be turned on by the first lock member.

According to a second aspect of the present invention, in addition to the operation of the first aspect, the interlock between the second lock member and the closing means is performed via a maintenance mechanism operation handle. As a result, one maintenance opening / closing contact is turned on by the maintenance mechanism operation handle, and at the same time, all other maintenance mechanisms that are not turned on are disabled by the second lock member.

According to a third aspect of the present invention, in addition to the operation of the first or second aspect of the present invention, a maintenance mechanism operation handle is inserted, and the maintenance mechanism operation shaft constituting the closing means is turned. When operated, the first lock member is moved up and down via the main operation member, and the second lock member is moved horizontally via the maintenance operation member. As a result, a complicated mechanism for interlocking the first lock member and the second lock member is not required.

According to the fourth aspect of the present invention, in addition to the operation of the third aspect, when the maintenance mechanism operation shaft 42 is rotated by the maintenance mechanism operation handle, the rotation of the maintenance mechanism operation handle is performed. The power is transmitted to the first operating lever 43 via the operation lock pin 45.

According to a fifth aspect of the present invention, in addition to the operation of the third or fourth aspect, the maintenance mechanism operation handle and the detent rotation transmitting means are engaged to perform maintenance. The turning power of the mechanism operation handle is transmitted to the maintenance mechanism operation shaft.

According to a sixth aspect of the present invention, in addition to the function of the first aspect of the present invention, the second lock member is provided by the elastic force of the holding means.
It is held in a locked position and an unlocked position.

According to the seventh aspect of the present invention, in addition to the operation of the sixth aspect, when the maintenance operation lever is held at the unlocked position, the biasing direction of the spring is changed to the second lock. Work in the direction to hold the member in the unlocked position. When the maintenance operation lever is held at the lock position, the biasing direction of the spring acts in the direction of holding the second lock member at the lock position. As a result, there is no need to separately provide members for holding the second lock member at each of the lock position and the unlock position.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention embodied in a multi-circuit gas switch will be described below with reference to the drawings.

As shown in FIG. 1, a multi-circuit gas switch 11
Has a main body case 12, and a closed case 13 is accommodated and fixed above the main body case 12. A maintenance terminal 14 and a power lead-out terminal 15 are provided on one side of the sealed case 13, and a controller 16 is arranged below the maintenance terminal 14. In addition, first to fifth main circuit terminals 17a to 17e protrude from the lower surface of the sealed case 13.

As shown in FIG. 1 and FIG.
3, a front panel 18 is attached via a support member 19, and a circuit display 20 (FIG.
See). The circuit display 20 is a closed case 13
This shows an internal circuit configuration. On a front panel 18, a plurality of status display holes 21 and a plurality of operation handle insertion holes 22 are formed on a circuit display 20. Each status display hole 21 and each operation handle insertion hole 22 are respectively arranged corresponding to a plurality of main circuit opening / closing contacts to be described later in the sealed case 13.

The status display hole 21 indicates the closed state of the main switching contact, and the display of "ON" and "OFF" is switched and displayed in conjunction with the closing and opening operations of the main circuit switching contact. The operation handle insertion hole 22 is for inserting an operation handle (not shown) at the time of manual operation of the main circuit opening / closing contact.
Below the operation handle insertion hole 22, maintenance mechanism operation parts 23a to 23e are provided.

FIG. 3 shows a circuit configuration for one phase in the multi-circuit gas switch 11. First to fifth main circuit switching contacts 31a to 31e housed in the sealed case 13
Are arranged in parallel with each other in an arc-extinguishing gas such as SF6. One ends of the main circuit switching contacts 31a to 31e are connected to each other, and the other ends are the first to fifth terminals, respectively.
They are connected to the main circuit terminals 17a to 17b. The main circuit terminals 17a to 17e are connected via a main cable 32a, connection cables 32b to 32d, and a branch cable 32e.
Each is connected to a power supply source 33a, consumers 33b to 33d, and another multi-circuit gas switch 33e.

First to fifth main circuit switching contacts 31a to 31e
Are closed (closed), the customers 33b to 33d
And another multi-circuit gas switch 33e has a power supply source 33
Power is supplied from a through the first to fifth main circuit switching contacts 31a to 31e. When the first to fifth main circuit switching contacts 31a to 31e are open (open circuit), the supply of power from the power supply source 33a to the customers 33b to 33d and another multi-circuit gas switch 33e is cut off. Is done. Normal,
Each of the main circuit switching contacts 31a to 31e is kept in a closed state.

The controller 1 is connected to the first main circuit terminal 17a side of the first main circuit opening / closing contact 31a through a power supply lead-out terminal 15.
6 is connected to the controller 16 and a power supply source 33 is connected to the controller 16.
a is always supplied with power via the main cable 32a. The controller 16 controls the automatic opening and closing of the first to fifth main circuit opening / closing contacts 31a to 31e by outputting the opening / closing signal.

The first to third main circuit switching contacts 31a to 31e
The fifth main circuit terminals 17a to 17e are connected to a single maintenance terminal 14 through first to fifth maintenance switching contacts 34a to 34e and maintenance wiring 35, respectively. Normally, the maintenance switching contacts 34a to 34e are held in an open (open circuit) state.

Accordingly, each of the main circuit switching contacts 31a to 31e
When the maintenance opening / closing contacts 34a to 34e are closed in a state in which the power supply source 33a and the customers 33b to 33
d and another multi-circuit gas switch 33e are connected to the maintenance terminal 14 via the maintenance wiring 35. The maintenance circuit 36 includes the maintenance switching contacts 34a to 34e, the maintenance wiring 35, and the maintenance terminal 14.

The closing or opening of the main circuit switching contacts 31a to 31e can be monitored by a limit switch or the like (not shown). When any one of the main circuit switching contacts 31a to 31e is turned on, the limit switch detects this and outputs a main circuit turning-on signal to the controller 16.

When the maintenance switching contacts 34a to 34e are turned on, the operating mechanism of the main circuit switching contacts 31a to 31e is mechanically locked. In this state, the main circuit switching contacts 31a to 31e are turned on by remote control or the like.
6, the main circuit switching contacts 31a to 31e cannot be operated due to the lock of the operation mechanism, and the automatic closing is prevented. At this time, since the signal of “OFF” → “ON” of the limit switch is not returned, the controller 16 determines that there is an abnormality and cancels the ON command. Therefore, the maintenance switching contacts 34a to 34a
e, the main circuit switching contacts 31a to 31e
Will be blocked automatically.

As shown in FIG. 2 and FIG.
An interlock mechanism 41 is provided between the front panel 3 and the front panel 18.
a to 41e are provided. Since the interlock mechanisms 41a to 41e have the same configuration, the configuration of the interlock mechanism 41a will be mainly described, and the components of the other interlock mechanisms 41b to 41e will be denoted by the same reference numerals and will be described repeatedly. Is omitted.

The interlock mechanism 41a has a maintenance mechanism operation shaft 42 as a closing and opening means. The maintenance mechanism operation shaft 42 is rotatably supported at a substantially central portion of the closed case 13 and extends from the closed case 13 to the outer surface. It is projected to. Flat surfaces 42a and 42b are formed parallel to each other on the outer periphery of the outer end of the maintenance mechanism operation shaft 42 as detent rotation transmitting means, and both flat surfaces 42a and 42b are provided with respect to a maintenance mechanism operation handle described later. And can be engaged.

A maintenance contact opening / closing mechanism (not shown) inside the sealed case 13 is operatively connected to an inner end (not shown) of the maintenance mechanism operation shaft 42, and a maintenance operation is performed at an outer end (see FIG. 2). A first operating lever 43 as a member and a second operating lever 44 as a main operating member are mounted. The first operation lever 43 is rotatable with respect to the maintenance mechanism operation shaft 42, and the second operation lever 44 is rotatable integrally with the maintenance mechanism operation shaft 42.

In the vicinity of the maintenance mechanism operation shaft 42 of the first operating lever 43, an operation lock pin 45 as an operation lock member is protruded in parallel with the central axis of the maintenance mechanism operation shaft 42. Therefore, when the operation lock pin 45 is operated by the maintenance mechanism operation handle described later, the first operation lever 43 is moved to the unlock position A shown by the solid line in FIG. 4 and the lock position B (shown by the two-dot chain line in FIG. 4). (See interlock mechanism 41b in FIG. 4). still,
The outer end face of the operation lock pin 45 is connected to the maintenance open / close contact 34a.
To 34e (for example, red).

The tip of the first operating lever 43 is rotatably connected to a lock link 47 as a second lock member via a pin 46. The lock link 47 is formed to extend in the left-right direction in FIG.
As shown in FIG.
a protrudes from the closed case 13 side.

A plurality of locking holes 48 are formed in the lock link 47 at predetermined intervals in the longitudinal direction. Also,
A plurality of fixing pins 49 are protruded at predetermined intervals below the lock link 47 of the closed case 13, and holding springs as holding means are respectively provided between the fixing pins 49 and the engaging holes 48. 50 is hooked.

As shown in FIG. 2 and FIG.
A first stopper piece 51a and a second stopper piece 51b protrude from the front left side of 3. The second stopper piece 51b is located slightly above the first stopper piece 51a and is separated by a predetermined distance.

As shown in FIGS. 4 and 5, the lock link 47 is movable between a non-lock position C shown by a solid line and a lock position D shown by a two-dot chain line. At the time of opening), the lock link 47 is held at the unlocked position C by the elastic force of the holding spring 50. The movement of the lock link 47 to the left (see FIG. 4) is restricted by the engagement of the outer surface of the engagement piece 47a with the first stopper piece 51a.

When the first operating lever 43 is operated in the rightward turning direction in FIG. 4, the lock link 47 moves from the unlocked position C to the locked position D against the elastic force of the holding spring 50.
Move horizontally in the direction. Then, when the first operation lever 43 is rotated beyond the vertical position Y, the lock link 47 is moved to the lock position D at a stretch by the elastic force of the holding spring 50. The rightward movement of the lock link 47 (see FIG. 4) is performed by moving the inner surface of the engagement piece 47a and the second stopper piece 51.
b is regulated by the engagement. Thereafter, the lock link 47 is held at the lock position D by the elastic force of the holding spring 50.

As shown in FIG. 4, the interlock mechanisms 41a to 41e are connected to each other via a first operating lever 43 and a lock link 47. Therefore, any one of the interlock mechanisms 41a to 41e
When the operating lever 43 is rotated from the unlocked position A (see FIG. 4) to the locked position B (see FIG. 4), the other first operating levers 43 are linked to the lock link 4 in conjunction with this operation.
7 to move from the unlock position A (see FIG. 4) to the lock position B (see FIG. 4).

On the other hand, as shown in FIGS. 2 and 4, the tip of the second operating lever 44 is rotatably connected via a pin 52 to a connecting portion 53a of a lock member 53 as a first lock member. ing. As shown in FIG.
A lock portion 53b having a substantially U-shaped flat cross section is formed in the upper portion of the upper portion, and the left side in FIG. 4 is opened.

An opening 54 is formed at the approximate center of the right side wall 53c of the lock portion 53b so as to extend in the vertical direction.
At the approximate center of d and 53e (see FIG. 6), long holes 55 are respectively provided.
Are formed to extend vertically. A guide pin 56 erected in the sealed case 13 is inserted into both the long holes 55, and the lock member 53 is guided by the same guide pin 56 and relatively moves within the range between the upper and lower ends allowed by the long hole 55. It is possible to move.

Therefore, when the maintenance mechanism operating shaft 42 is rotated, the lock member 53 is moved through the second operating lever 44 to the non-coupling position E shown by a solid line in FIG. Link position F (interlock mechanism 4 in FIG. 4)
1b).

When the lock member 53 is held at the non-coupling position E, the guide pin 56 is located at the upper end of the long hole 55. When the lock member 53 is held at the coordination position F, the guide pin 56 The pin 56 is located at the lower end of the long hole 55. That is, the vertical movement of the lock member 53 is regulated by the guide pin 56.

As shown in FIGS. 2 and 4, a main circuit drive shaft 61 is rotatably supported on the upper part of the closed case 13, and the outer end of the main circuit drive shaft 61 projects out of the closed case 13. An inner end (not shown) of the main circuit drive shaft 61 is connected to a main contact opening / closing operation mechanism (not shown) inside the sealed case 13.

A main contact lock plate 62 is mounted on the outer end of the main circuit drive shaft 61 (see FIG. 2) so as to be integrally rotatable. The main contact lock plate 62 includes a restricting portion 62a and a connecting portion 6
2b is formed, and has a substantially U shape. The main contact lock plate 62 is capable of swinging between a closing position G shown by a solid line in FIG. 4 and an open position H shown by a two-dot chain line in FIG. 4 with the rotation of the main circuit drive shaft 61. .

When the main contact lock plate 62 is held at the closing position G (see FIG. 4), the restricting portion 62a protrudes above the lock member 53 and is located within the movement locus. As a result, the upward movement of the lock member 53 is restricted by the restricting portion 62a. Therefore, the maintenance mechanism operation shaft 42 and the second operation lever 44 cannot be rotated.

When the main contact lock plate 62 is in the open position H
When it is held at (see FIG. 4), the restricting portion 62a is located outside the movement locus of the lock member 53. As a result,
The upward movement of the lock member 53 is allowed. Therefore, the maintenance mechanism operation shaft 42 and the second operating lever 44 are rotatable.

As shown in FIGS. 2 and 4, a main circuit opening / closing shaft 63 is rotatably supported below the maintenance mechanism operation shaft 42 in the closed case 13, and the outer end thereof is connected to the closed case 13. It is projected on the outer surface. Main circuit open / close shaft 63
Are connected to main circuit switching contacts 31a to 31e (see FIG. 3) inside the sealed case 13. Accordingly, with the rotation of the main circuit opening / closing shaft 63, the main circuit opening / closing contacts 31a to 31e (see FIG. 3) can be turned on or opened. Outer end of main circuit opening / closing shaft 63 (see FIG. 2)
, A main circuit opening / closing lever 64 is mounted so as to be integrally rotatable.

The main circuit opening / closing shaft 63 is rotatable via an automatic opening / closing mechanism when an input signal is output from the controller 16. With the rotation of the main circuit opening / closing shaft 63, the main circuit opening / closing lever 64 can swing between a closing position I shown by a solid line in FIG. 4 and an opening position J shown by a two-dot chain line in FIG. ing.

Main circuit opening / closing lever 64 and main contact lock plate 6
The connecting link 67 is provided between the second connecting portion 62b and the connecting portion 62b.
5, 66 are connected. Accordingly, in conjunction with the swing of the main circuit opening / closing lever 64 between the closed position I and the open position J, the main contact lock plate 62 moves the closed position G (see FIG. 4) and the open position H (see FIG. 4). And will swing between them.

As shown in FIGS. 2 and 4, the maintenance mechanism operation shaft 42 and the main circuit drive shaft 61 in the closed case 13 are provided.
, A handle operation shaft 68 is rotatably supported, and an outer end of the handle operation shaft 68 protrudes from the closed case 13 to an outer surface. An inner end (not shown) of the handle operation shaft 68 is operatively connected to a main contact opening / closing mechanism (not shown) inside the sealed case 13, and a handle operation lock plate 69 is integrated with an outer end (see FIG. 2). It is mounted rotatably.

The handle operation shaft 68 and the handle operation lock plate 69 face the opening 54 of the lock member 53 held at the non-coupling position E (see FIG. 4). Accordingly, when the handle operation shaft 68 is rotated in a state where the lock member 53 is held at the non-coupling position E (see FIG. 4), the handle operation lock plate 69 is moved to the non-lock position K shown by a solid line in FIG.
And the lock position L.

The lock position L is a position where the handle operation lock plate 69 is engaged in the opening 54 of the lock member 53, and is shifted from the non-linkage position E (see FIG. 4) of the lock member 53 to the linkage position F (see FIG. 4). 4) is restricted by the handle operation lock plate 69 and the main contact lock plate 62. When the handle operation lock plate 69 is held at the unlock position K, the handle operation lock plate 69 is located outside the movement locus of the lock member 53.

When the lock member 53 is held at the link position F (see FIG. 4), the opening 54 of the lock member 53 is relatively positioned above the handle operation shaft 68 and the handle operation lock plate 69. ing. That is, the movement of the handle operation lock plate 69 from the unlock position K to the lock position L is restricted by the right side wall 53c of the lock portion 53b, so that the handle operation shaft 68 cannot rotate. (The handle operation lock plate 6 shown by a two-dot chain line in FIG. 4
The rotation position 9 indicates a normal operation state. The interlock mechanisms 41a to 41e are provided for the maintenance switching contacts 3
First interlock means for interlocking between 4a to 34e, and second interlock means for interlocking between main circuit switching contacts 31a to 31e and corresponding maintenance switching contacts 34a to 34e. I have. The first interlock means includes the first operating lever 43, the operation lock pin 45, the lock link 47, and the holding spring 50.
And so on. The second interlock means includes the second operating lever 44, the lock member 53, the main contact lock plate 62, the handle operation lock plate 69, and the like.

As shown in FIG. 7, the maintenance mechanism operation shaft 4
The reference numeral 2 penetrates the front panel 18 and the plate 71 fixed to the front panel 18 and projects to the front. A rotation display plate 72 is fixed to an outer end surface of the maintenance mechanism operation shaft 42 by a mounting portion 73 so as to be integrally rotatable. Therefore, the rotation state of the maintenance mechanism operation shaft 42 can be easily checked by the operator on the front panel 18, and a reliable operation can be obtained.

Next, the operation of the multi-circuit gas switch 11 will be described. First, the main circuit switching contacts 31a-3
The operation of the interlock mechanisms 41a to 41e during automatic and manual closing of 1e will be described with reference to FIG.

(1-1) Maintenance switching contacts 34a to 34e
When the multi-circuit gas switch 11 is automatically turned on in the open state, a control signal is output from the controller 16 by remote control or the like. Then, the main circuit drive shaft 61 rotates left (see FIG. 4) via a main contact opening / closing mechanism (not shown), and the main contact lock plate 62 moves from the open position H to the closing position G. Then, the connecting link 67 is moved upward, the main circuit opening / closing lever 64 moves from the open position J to the closing position I, and the main circuit opening / closing shaft 63 rotates left (see FIG. 4). As a result, the main circuit switching contacts 31a to 31e are turned on.

(1-2) On the other hand, the maintenance switching contacts 34a-34
When the multi-circuit gas switch 11 is manually turned on in the open state of 34e, the lock member 53 is held at the non-coupling position E. Therefore, the rotation of the handle operation lock plate 69 from the unlock position K to the lock position L and the rotation of the main contact lock plate 62 from the open position H to the closing position G are allowed.

(1-3) In this state, when the handle operation shaft 68 is turned to the right (see FIG. 4), the handle operation lock plate 69 moves from the unlock position K to the lock position L. As a result, the handle operation lock plate 69 enters the opening 54 of the lock member 53. In conjunction with the rotation of the handle operation shaft 68, the main circuit drive shaft 61 rotates left (see FIG. 4) via a main contact opening / closing mechanism (not shown), and the main contact lock plate 62 opens. From position H to loading position G
Move to. Then, the connecting link 67 is moved upward, the main circuit opening / closing lever 64 is moved from the opening position J to the closing position I, and the main circuit opening / closing shaft 63 is rotated left (FIG. 4).
refer. As a result, the main circuit switching contacts 31a to 31e
Is input.

(1-4) Main circuit switching contacts 31a to 31
When opening e, the operation reverse to that at the time of closing is performed.
Next, the operation of the interlock mechanisms 41a to 41e when the maintenance opening / closing contacts 34a to 34e are operated in the closed state of the main circuit opening / closing contacts 31a to 31e will be described with reference to FIG.
It will be described according to.

(2-1) Main circuit switching contacts 31a to 31
In the closed state of e, the main contact lock plate 62 is held at the closed position G. That is, the restricting portion 62 a of the main contact lock plate 62 is located above the lock member 53.

(2-2) In this state, when the maintenance mechanism operation shaft 42 is rotated clockwise by the maintenance mechanism operation handle 91 (see FIG. 8), the lock member 53 tends to move upward. (2-3) However, the upward movement of the lock member 53 (the movement from the non-linkage position E to the linkage position F) is restricted by the upper end of the lock member 53 abutting on the restriction portion 62a. That is, the lock member 53 cannot move upward, and the movement of the lock member 53 from the non-linkage position E to the linkage position F is prevented halfway.

(2-4) Therefore, the maintenance mechanism operation shaft 42 by the maintenance mechanism operation handle 91 cannot be rotated, and the maintenance opening / closing contacts 34a to 34e cannot be closed. As a result, in the closed state of the main circuit switching contacts 31a to 31e, the erroneous closing of the maintenance switching contacts 34a to 34e corresponding to the closed main circuit switching contacts 31a to 31e is prevented.

Next, the operation of the interlock mechanisms 41a to 41e when the maintenance switching contacts 34a to 34e are turned on will be described with reference to FIGS. (3-1) In the open state of the main circuit switching contacts 31a to 31e, the main contact lock plate 62 is held at the open position H, and the handle operation lock plate 69 is held at the unlock position K. Therefore, the movement of the lock member 53 from the non-coupling position E (see FIG. 8) to the coordination position F (see FIG. 9) is permitted.

(3-2) In this state, when the maintenance mechanism operation shaft 42 is rotated rightward from the non-contact position to the three-phase contact position via the one-phase contact position, the maintenance opening / closing contacts 34a to 34e.
(See FIG. 3) are supplied for all three phases.

(3-3) The maintenance mechanism operation shaft 4
The lock member 53 moves from the non-coupling position E to the coordination position F via the second operation lever 44 in conjunction with the right rotation of the lock lever 2, and the lock link 47 is unlocked via the first operation lever 43. Move from position C to lock position D. As a result, the main circuit on / off contacts 31a to 31e corresponding to the supplied maintenance on / off contacts 34a to 34e cannot be turned on.

When the maintenance mechanism operation shaft 42 is turned to the right, the first
The operation of the operation lever 43 will be described later. next,
In the closed state of the maintenance switching contacts 34a to 34e,
The operation of the interlock mechanisms 41a to 41e when the main circuit switching contacts 31a to 31e are turned on will be described with reference to FIG.

(4-1) Maintenance switching contacts 34a to 34e
Is locked, the lock member 53 is held at the linkage position F (see the interlock mechanism 41b in FIG. 4). At this time, the opening 54 is located above the handle operation lock plate 69.

(4-2) In this state, when the handle operation shaft 68 is rotated rightward by the manual operation handle (see FIG. 9), the handle operation lock plate 69 is rotated rightward (see FIG. 9). And

(4-3) However, the right rotation of the handle operation lock plate 69 is restricted by the contact of the handle operation lock plate 69 with the right side wall 53 c of the lock member 53. That is, the handle operation lock plate 69 cannot rotate in the closing direction, and the movement of the handle operation lock plate 69 from the unlocked position K to the lock position L is restricted on the way.

(4-4) As a result, the continuation of the closing operation of the main circuit opening / closing contacts 31a to 31e by the manual operation handle is prevented. Therefore, when the maintenance circuit 36 is turned on, the main circuit switching contacts 31a to 31 by the manual operation handle are provided.
Erroneous input of e is prevented.

(4-5) On the other hand, the maintenance switching contacts 34a-34
In the closing state of 34e, when a closing signal is output from the controller 16 by remote control or the like, the main circuit drive shaft 6
Reference numeral 1 denotes a left rotation via a main circuit opening / closing mechanism (not shown) (FIG.
The main contact lock plate 62 is about to rotate to the left.

However, the left rotation of the main contact lock plate 62 is regulated by the contact of the main contact lock plate 62 with the upper right wall 53c of the lock member 53 (see FIG. 9). In other words, the main contact lock plate 62 cannot rotate in the closing direction, and the movement of the main contact lock plate 62 from the open position H to the closed position G is regulated halfway.

As a result, continuation of the closing operation of the main circuit switching contacts 31a to 31e by remote control is prevented. Therefore, erroneous closing of the main circuit switching contacts 31a to 31e due to remote operation in the closed state of the maintenance circuit 36 is prevented.

Next, the action of the maintenance mechanism operation handle 91 when the maintenance mechanism operation sections 23a to 23e are operated will be described with reference to FIGS.
0 and FIG. (5-1) When the main circuit switching contacts 31a to 31e are open, the flat surfaces 42a,
The positional relationship between the notch direction of 42b and the operation lock pin 45 provided on the first operation lever 43 is such that both can be inserted into the engagement notch 94 of the maintenance mechanism operation handle 91 as shown in FIG. The maintenance mechanism operation handle 91 can be mounted on the maintenance mechanism operation shaft 42.

(5-2) The maintenance mechanism operation handle 91 is attached to the maintenance mechanism operation shaft 42 of one of the circuits to be grounded.
The first operating lever 43 is rotated from the unlocked position A to the locked position B when the camera is mounted and turned to the right. In conjunction with this, the other first operating levers 43 are unlocked via the lock links 47. It rotates from position A to lock position B.

(5-3) As shown in FIG. 11, the positional relationship between the other maintenance mechanism operation shaft 42 and the operation lock pin 45 of the first operation lever 43 is determined by the engagement notch of the maintenance mechanism operation handle 91. The operation lock pin 45 locks the insertion operation of the maintenance mechanism operation shaft 42 into the 94, so that the insertion operation of the other maintenance mechanism operation shaft 42 is prevented.

Therefore, according to the present embodiment, the following effects can be obtained. The lock member 53 and the lock link 47 are interlocked with the operation of the maintenance mechanism operation shaft 42, respectively. That is, when any one of the maintenance switching contacts 34a to 34e (the maintenance switching contact 34b in the present embodiment) is turned on in the open state of the main circuit switching contacts 31a to 31e, the lock member 53 is linked from the non-linkage position E. Move to position F,
The lock link 47 moves from the unlocked position C to the locked position D. Conversely, maintenance switching contacts 34a-3
In the open state of 4e, the main circuit switching contacts 31a to 31
When e is input, the main contact lock plate 62 moves from the open position H to the input position G.

As a result, the main circuit on / off contact 31b corresponding to the maintenance on / off contact 34b and the other maintenance on / off contacts 34a, 34c to 34e that are not closed are not closed. Further, the movement of the lock member 53 from the non-coupling position E to the coordination position F is restricted, and the maintenance opening / closing contacts 34a to 34e cannot be closed. Therefore, the main circuit switching contacts 31a-3
1e and one of the maintenance switching contacts 34a to 34e corresponding to each of the main circuit switching contacts 31a to 31e can be turned on. Only one of the main circuit switching contacts 31a to 31e and each of the main circuit switching contacts 31a to 31e can be connected. Corresponding maintenance switching contact 3
4a to 34e can be simultaneously prevented. Only one of the maintenance switching contacts 34a to 34e can be turned on.
At the same time.

The lock link 47 and the maintenance mechanism operation shaft 4
2 is configured to be performed via the maintenance mechanism operation handle 91. That is, the maintenance mechanism operation handle 91
When the maintenance mechanism operation shaft 42 is turned on, the lock link 47 is moved to the unlocked position C via the first operation lever 43.
To the lock position D. As a result, one maintenance opening / closing contact (in this embodiment, maintenance opening / closing contact 34b) is turned on by the maintenance mechanism operating handle 91, and at the same time, all other maintenance opening / closing contacts 34a,
34c to 34e are disabled by the lock link 47. Accordingly, the maintenance switching contacts 34a to 34
The simultaneous injection of e can be prevented.

The second actuating lever 44 for vertically moving the lock member 53 is connected to the maintenance mechanism operation shaft 42 so as to be integrally rotatable. Also, only when the maintenance mechanism operation handle 91 is inserted, the first operating lever 43 that enables the lock link 47 to move horizontally is moved to the maintenance mechanism operation shaft 42.
To be rotatable.

That is, with the maintenance mechanism operation handle 91,
When the maintenance mechanism operation shaft 42 is turned on, the second operating lever 44 rotates integrally with the maintenance mechanism operation shaft 42, and the lock member 53 corresponding to the maintenance mechanism operation shaft 42 that has been turned on is moved to the non-coupling position E. It moves up and down between the link positions F. Further, when the maintenance mechanism operation shaft 42 is turned on, the lock link 47 is horizontally moved between the lock position D and the unlock position C via the first operation lever 43,
In conjunction with the horizontal movement of the lock link 47, the other first operating lever 43 that is not operated for closing swings between the unlocked position A and the locked position B. As a result, a complicated mechanism for linking the lock member 53 and the lock link 47 is not required. Therefore, the lock member 53 and the lock link 47 can be linked with a simple configuration.

An operation lock pin 45 protrudes from the first operating lever 43 on the side where the maintenance mechanism operation handle is inserted, in parallel with the axis of the maintenance mechanism operation shaft 42 and close to the maintenance mechanism operation shaft 42. . That is, the first operating lever 43 swings between the unlocked position A and the locked position B when the operation lock pin 45 is rotated. As a result, the maintenance mechanism operation shaft 42 is operated by the maintenance mechanism operation handle.
Is rotated, the rotational power of the maintenance mechanism operation handle is transmitted to the first operating lever 43 via the operation lock pin 45. Therefore, the first operation lever 43 can be rotated in conjunction with the rotation of the maintenance mechanism operation shaft 42.

The maintenance mechanism operation shaft 42 is formed with flat surfaces 42 a and 42 b which enable the maintenance mechanism operation shaft 42 and the maintenance mechanism operation handle 91 to engage and rotate. The insertion into the operation shaft 42 is performed by guiding the engagement notch 94 to the flat surfaces 42a and 42b. As a result, the engagement notch 94
The rotation of the maintenance mechanism operation handle 91 is transmitted to the maintenance mechanism operation shaft 42 by the engagement of the flat surfaces 42a, 42b with the flat surfaces 42a, 42b. Therefore, the maintenance mechanism operation shaft 42 can be rotated by the maintenance mechanism operation handle 91.

The lock link 47 includes a lock position D where the maintenance opening / closing contacts 34a to 34e are held in a closed state, and the maintenance opening / closing contacts 34a to 34e.
A holding spring 50 for holding each is provided at the unlocked position C where is held in the open state. That is, the lock link 47 is held at the lock position D and the unlock position C by the elastic force of the holding spring 50. Therefore, the lock link 47 can be held at the lock position D and the unlock position C.

The holding spring 50 is connected to the first operating lever 43.
Are biased in directions opposite to each other based on the vertical position Y. That is, when the first operating lever 43 is held at the unlock position A, the biasing direction of the holding spring 50 is
The lock link 47 works in a direction to hold the lock link 47 at the unlocked position C. When the first operating lever 43 is held at the lock position B, the biasing direction of the holding spring 50 is
The lock link 47 is operated in a direction for holding the lock link D at the lock position D. As a result, there is no need to separately provide members for holding the lock link 47 at each of the lock position D and the unlock position C. Therefore, the configuration of the interlock mechanisms 41a to 41e can be simplified.

A handle operation lock plate 69 is mounted on the handle operation shaft 68 so as to be integrally rotatable, and the handle operation lock plate 69 can swing between an unlocked position K and a locked position L. An opening 54 is formed in the right side wall 53c of the lock member 53 so that the lock member 53 is moved to the non-coupling position E.
, The handle operation lock plate 69 can enter the opening 54. Conversely, when the lock member 53 is held at the link position F, the handle operation lock plate 69 abuts the right side wall 53c and cannot enter the opening 54. As a result, the maintenance switching contacts 34a to 34e
The closing of the main circuit switching contacts 31a to 31e in the closed state is prevented. Therefore, the main circuit switching contacts 31a to 31
e and the maintenance switching contacts 34a to 34e can be prevented from being simultaneously turned on.

The main contact drive plate 61 is connected to the main circuit drive shaft 61;
The main contact lock plate 62 is swingable between a closing position G and an opening position H. That is,
When the main circuit switching contacts 31a to 31e are turned on,
The upward movement of the lock member 53 is restricted by the restriction part 62a. As a result, the main circuit switching contact 31a
Switching contacts 34a to 34e in the closed state of .about.31e.
The injection of e is prevented. Therefore, the main circuit switching contact 31a
To 31e and the maintenance switching contacts 34a to 34e can be prevented from being simultaneously turned on.

The above embodiment may be modified and implemented as follows. The maintenance mechanism operation handle 91 is not disabled, and the maintenance mechanism operation shaft 42 can be closed.
a, You may provide the mechanism which can prevent throwing in of 34c-34e. Even in this case, the maintenance switching contact 34
It is possible to prevent simultaneous injection between a to 34e.

Although the manual operation can be performed instead of making the handle operation shaft 68 unrotatable, the main circuit open / close contact 31b corresponding to the maintenance open / close contact 34b in the closed state even if the manual open operation is performed. May be provided. Even in this case, it is possible to prevent the maintenance switching contact 34ba that has been switched on and the main circuit switching contact 31b corresponding thereto from being switched on simultaneously.

While the embodiment has been described above, technical ideas other than the claimed invention which can be understood from the embodiment will be described below together with their effects. The main circuit switching contact corresponding to the maintenance switching contact that has been turned on in conjunction with the closing operation of any one of the plurality of maintenance switching contacts (34a to 34e), and all other switches that are not being closed. Of the plurality of main circuit on / off contacts (31a to 31e), and when any one of the plurality of main circuit on / off contacts is closed, the main circuit on / off contact corresponds to the main circuit on / off contact. A multi-circuit switch provided with an interlock mechanism (41a to 41e) for locking a maintenance opening / closing contact so as not to be closed or a closed operation.

In this way, it is possible to prevent simultaneous switching of the main circuit switching contacts and maintenance switching contacts corresponding to the respective main circuit switching contacts, and to prevent simultaneous switching of a plurality of maintenance switching contacts. it can.

A plurality of maintenance switching contacts (34a to 34)
e), when any one of the maintenance opening / closing contacts is turned on, the maintenance lock member (47) is moved from the unlocked position (C) to the locking position (D), and all other maintenance opening / closing that are not turned on are moved. An interlock method between maintenance switching contacts that disables contact closure.

In this way, it is possible to prevent simultaneous switching between a plurality of switching contacts.

[0096]

According to the first aspect of the present invention, it is possible to prevent simultaneous switching of the main circuit switching contact and the maintenance switching contact corresponding to the main circuit switching contact, and also to prevent the maintenance switching contact between the maintenance switching contacts. Simultaneous injection can be prevented.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), it is possible to reliably prevent simultaneous switching between the maintenance switching contacts. According to the third aspect, in addition to the effects of the first or second aspect, the first lock member and the second lock member can be linked with a simple configuration.

According to the invention set forth in claim 4, according to claim 3,
In addition to the effects of the invention described in (1), the maintenance operation member can be rotated via the operation lock member in conjunction with the rotation operation of the maintenance mechanism operation shaft.

According to the invention described in claim 5, according to claim 3,
Alternatively, in addition to the effect of the invention described in claim 4, the maintenance mechanism operation shaft can be rotated by the maintenance mechanism operation handle.

According to the invention set forth in claim 6, according to claim 1,
In addition to the effects of the invention described in any one of the first to fifth aspects, the second lock member can be held at the lock position and the unlock position.

According to the invention of claim 7, according to claim 6,
In addition to the effects of the invention described in (1), the configuration of the interlock mechanism can be simplified.

[Brief description of the drawings]

FIG. 1 is a front view of a multi-circuit gas switch.

FIG. 2 is a left side view of a main part of the closed gas case.

FIG. 3 is a schematic circuit diagram of a multi-circuit gas switch.

FIG. 4 is a front view of an interlock mechanism.

FIG. 5 is an enlarged plan view of a main part of the interlock mechanism.

FIG. 6A is an enlarged sectional view of a main part of an interlock mechanism. (B) is a schematic right side view of a main part of the lock member.

FIG. 7 is an enlarged left side view of a main part of the closed gas case.

FIG. 8 is an enlarged front view of a main part of the interlock mechanism.

FIG. 9 is an enlarged front view of a main part of the interlock mechanism.

FIG. 10 is a front view of a main part of the maintenance mechanism operation unit showing a correlation between the maintenance mechanism operation handle and the operation lock pin in a maintenance circuit open state.

FIG. 11 is a front view of a main part of the maintenance mechanism operation unit showing a correlation between the maintenance mechanism operation handle and the operation lock pin after only one maintenance circuit is turned on.

[Explanation of symbols]

11: Multi-circuit gas switch, 31a to 31e: Main circuit switching contact, 34a to 34e: Maintenance switching contact, 41a to 41e
... interlock mechanism, 45 ... operation lock pin (operation lock member), 47 ... lock link (second lock member),
42 ... Maintenance mechanism operation axis (injection opening means), 42a, 42
b: flat surface (rotation-stop rotation transmitting means), 43: first
Operating lever (maintenance operating member), 44 ... second operating lever (main operating member), 50 ... holding spring (holding means), 53 ...
Lock member (first lock member), 91: maintenance mechanism operating handle, C: unlocked position (47), D: locked position (47), E: unlinked position (53), F: linked position (5)
3), Y: vertical position (43).

Claims (7)

[Claims] 1. A plurality of maintenance switching contacts (34a to 34e).
In conjunction with the closing operation of any one of the maintenance opening / closing contacts, the main circuit opening / closing contact corresponding to the maintenance opening / closing contact operated and the other maintenance opening / closing contacts that are not operated are locked so that they cannot be closed. When any one of the plurality of main circuit switching contacts (31a to 31e) is turned on, the interlock mechanism (41a to 41e) locks the maintenance switching contact corresponding to the main circuit switching contact so as not to be turned on. 41e), the interlock mechanism (41a-41e) includes a plurality of maintenance switching contacts (34a-34e) and a main circuit switching contact (31a) corresponding to each maintenance switching contact. To 31e), a first lock member (53) provided for each circuit for interlocking between the first and second maintenance switches, and one maintenance opening / closing contact. A second lock member (47) for interlocking the other maintenance opening / closing contacts so that they cannot be closed. The first and second locking members (53, 47) are connected to the respective maintenance opening / closing contacts (34a to 34e). Multi-circuit switches respectively linked with the opening / closing means (42) for performing the opening / closing of the circuit. 2. The multi-circuit switch according to claim 1, wherein the interlock between the second lock member (47) and the opening / closing means is performed via a maintenance mechanism operation handle (91). 3. The first lock member (53) is locked to a non-lockable non-linkage position (E) and a lockable linkage position (F) with respect to a maintenance mechanism operation shaft (42) constituting the opening / closing means. ), The main operating member (44) movably interlocking with the main operating member (44), and the second locking member (47) is locked only when the maintenance mechanism operation handle (91) is inserted. The multi-circuit switch according to claim 1 or 2, wherein a maintenance operation member (43) movable between (C) and a lockable lock position (D) is rotatably connected. 4. An operation lock member (45) protruding from the maintenance operation member (43) on the maintenance mechanism operation handle insertion side in the vicinity of the maintenance mechanism operation shaft (42). 45), the maintenance mechanism operation handle (91)
4. The multi-circuit switch according to claim 3, wherein the switch can be operated. 5. The maintenance mechanism operation shaft (42) includes a maintenance mechanism operation shaft (42) and a maintenance mechanism operation handle (91).
Rotation transmitting means (42
The multi-circuit switch according to claim 3 or 4, wherein a, 42b) is provided. 6. The second lock member (47) includes a lock position (D) in a maintenance open / close contact state and a non-lock position (C) in a maintenance open / close contact open state. And holding means (50) for holding each of them.
The multi-circuit switch according to any one of claims 1 to 5, further comprising: 7. The maintenance operation member (43) is provided so as to be movable across a vertical position (Y) whose center is located on a vertical line, and the holding means (50) is provided with a maintenance operation member (43). The multi-circuit switch according to claim 6, wherein the springs are biased in directions opposite to each other based on the vertical position (Y) of (43).