JP2000331575A - Multi-circuit switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-circuit switch capable of disabling the other maintenance switch contacts from being closed when one maintenance switch contact is closed among a plurality of maintenance switch contacts. SOLUTION: In this multi-circuit switch, when one maintenance switch contact is closed, interlock mechanisms 41a to 41e disable all the other maintenance switch contacts not to be closed from being closed by moving a maintenance lock member 47 common to all the maintenance switch contacts from a non-lock position C to a lock position D. Maintenance mechanism operating shafts 42 for closing/opening the respective maintenance switch contacts are each formed so as to allow a maintenance mechanism operating handle to be mounted thereon, Only when one maintenance mechanism operating handle 91 is mounted on a corresponding maintenance mechanism operating shaft 42, the maintenance mechanism operating handle is linked to the lock link 47, which is interlockingly moved from the non-lock position C to the lock position D by the closing operation of the maintenance mechanism operating handle.

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 As shown in FIG. 27, as a multi-circuit gas switch 101, a single main circuit 102a to 102e is provided for improving safety and reliability of grounding and inspection work. One provided with a maintenance terminal 103 has been proposed. The maintenance terminal 103 and the main circuits 102a to 102e
Are connected or disconnected by maintenance switching contacts 104a to 104e provided for each of the main circuits 102a to 102e. One end of each of the maintenance switching contacts 104a to 104e is connected to the corresponding main circuit 102a to 102e, and the other end is connected to the same maintenance line 105 extending from the maintenance terminal 103.

Each of the main circuits 102a to 102e is provided with main circuit switching contacts 106a to 106e. When the main circuit switching contacts 106a to 106e are turned on, the corresponding maintenance switching contacts 104a are provided. ~ 104
"e" cannot be closed by an interlock mechanism (not shown). When the maintenance switching contacts 104a to 104e are turned on, the main circuit switching contacts 1 corresponding to the maintenance switching contacts 104a to 104e are turned on.
06a to 106e are disabled by the interlock mechanism, and in this state, a grounding / inspection connection cable (not shown) is connected to the maintenance terminal.

[0004]

However, in the conventional multi-circuit gas switch 101, when the plurality of main circuit switch contacts 106a to 106e are open, a plurality of maintenance switch contacts 104a to 104e corresponding to the respective main circuit switch contacts 106a to 106e. It could be put in at the same time. For this reason, when a voltage is applied from the maintenance terminal 103 for inspection in a state where the plurality of maintenance switching contacts 104a to 104e are simultaneously turned on, the applied voltage is outside the inspection target among the plurality of branch lines 107a to 107e. It will also join the branch line. Therefore, it may be difficult to determine which branch line among the plurality of branch lines 107a to 107e is the inspection result.

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 the first aspect of the present invention, when any one of a plurality of maintenance switching contacts is turned on, a maintenance locking member common to each maintenance switching contact is provided. Move from unlocked position to locked position,
In a multi-circuit switch equipped with an interlock mechanism that disables the closing of all other maintenance switching contacts that are not closed,
Each opening / closing means for performing the opening / closing of each maintenance opening / closing contact is formed so that a maintenance mechanism operating handle can be attached thereto, and only when the maintenance mechanism operating handle is attached to the opening / closing means, the maintenance mechanism operating handle can be mounted. The gist of the invention is that the maintenance lock member is operatively connected to the maintenance lock member, and is linked from the unlocked position to the locked position by the closing operation of the maintenance mechanism operation handle.

According to a second aspect of the present invention, in the first aspect of the present invention, the maintenance lock member is actuated within a closing operation trajectory of a maintenance mechanism operating handle mounted on the closing opening means. By providing a maintenance operation member and linking the maintenance mechanism operation handle and the maintenance operation member to each other, the maintenance operation member can be rotated, and the maintenance mechanism operation handle is mounted on the loading opening means. The gist is that the maintenance lock member is configured to be linked from the unlock position to the lock position via the maintenance operation member by the closing operation of the maintenance mechanism operation handle.

According to a third aspect of the present invention, in the second aspect of the present invention, the maintenance operating member is rotatably mounted on the opening / closing means, and a maintenance mechanism operation handle is mounted on the opening / opening means. The gist of the present invention is that the two members are configured to be able to rotate together only when they are performed.

According to a fourth aspect of the present invention, in the second and third aspects of the present invention, an operation lock member is protruded from a maintenance operation member in proximity to the charging / opening means, and a maintenance mechanism operation handle is provided. Accordingly, the gist of the present invention is that the loading / opening means and the operation lock member can be simultaneously rotated.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, when any one of the plurality of maintenance opening / closing contacts is turned on, the cover is provided on the cover for closing the opening / closing means. The gist is that the operation lock members corresponding to all the maintenance opening / closing contacts are located within the used display means.

According to a sixth aspect of the present invention, in the invention of the fourth and fifth aspects, when any one of the plurality of maintenance switching contacts is turned on, the operation lock member is turned on. Moves from the non-interference position to the interference position with the rotation of all the maintenance operation members, and does not require the attachment of the maintenance mechanism operation handle (91) to the opening / closing means corresponding to the other maintenance opening / closing contacts that are not closed. The gist is that it is configured to enable it.

According to a seventh aspect of the present invention, in the invention according to the sixth aspect, the structure for disabling the attachment of the maintenance mechanism operation handle to the opening / closing means comprises an operation lock member and the opening / closing means. The gist of the present invention is that the relative positional relationship with the maintenance mechanism operation shaft is such that the maintenance mechanism operation handle cannot be mounted.

According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the maintenance mechanism operation handle is provided at the mounting position of the maintenance mechanism operation handle on the maintenance mechanism operation shaft. The gist is that first and second engagement surfaces are provided in parallel with the axis of the operation shaft, and the maintenance mechanism operation handle is provided with inserted guide means along both engagement surfaces.

According to a ninth aspect of the present invention, in the invention according to the eighth aspect, a relative positional relationship between the operation lock member and the opening / closing means which disables attachment of the maintenance mechanism operation handle to the opening / closing means. The gist is that the operation lock member is located outside a region surrounded by two planes including the first and second engagement surfaces.

According to a tenth aspect of the present invention, in the invention according to any one of the fifth to ninth aspects, the cover is provided with operation suggesting means for indicating a direction in which the maintenance mechanism operation handle is inserted or removed. Is provided over the rotation angle range of the maintenance mechanism operation handle, and the maintenance mechanism operation shaft is provided with a rotation display plate rotatable with the rotation of the maintenance mechanism operation handle. The display plate is provided with insertion guide means for guiding the insertion of the maintenance mechanism operation handle. When the maintenance mechanism operation handle is rotated, the rotation display plate is simultaneously rotated in the range of the operation suggestion means, and the insertion guide is provided. The gist of the invention is that the means is always located in the insertion / removal direction of the maintenance mechanism operation handle.

According to an eleventh aspect of the present invention, in the invention of the tenth aspect, the maintenance mechanism operation handle is provided with operation display means for restricting an insertion limit by the operation suggestion means. I do.

According to a twelfth aspect of the present invention, in the tenth and eleventh aspects of the present invention, the operation display means is projected upward through the insertion guide means, and the rotation display plate is provided with the operation display means. The gist of the invention is that it is configured to be rotated together with it.

The invention according to claim 13 is the invention according to claim 10
In the invention according to any one of claims 12,
The gist of the invention is that the insertion guide means is located at one end and the other end of the operation suggestion means when the maintenance switching contact is turned on and off.

The invention according to claim 14 is the invention according to claim 10
In the invention according to any one of claims 13,
The gist is that the operation suggesting means is formed in two stages, and the operation of the maintenance mechanism operation handle in the radial direction of the rotation display plate is added during the rotation operation of the maintenance mechanism operation handle. I do.

The invention according to claim 15 is the invention according to claim 10
In the invention according to any one of claims 14,
In the open state of the maintenance switching contact, the color indicating the open state is exposed from the operation suggestion means, and in the closed state, the color indicating the closed state is exposed from the operation suggestion means.
The gist of the present invention is that the rotation display plate is configured.

The invention according to claim 16 is the invention according to claim 10
In the invention according to any one of claims 15,
Part of the cover is provided with open / close display means for displaying the opening / closing of the maintenance opening / closing contact, and the rotating display plate is provided with status display means for indicating opening / closing of the maintenance opening / closing contact. The gist of the present invention is that display is provided via the open-close display means.

According to a seventeenth aspect of the present invention, in the ninth aspect of the present invention, the concealment covers the entire operation display unit including the cover and the rotation display plate. The gist is that the panel is provided so that it can be opened and closed.

According to an eighteenth aspect of the present invention, in the invention according to the seventeenth aspect, the concealment panel is attached to the main body below the operation display unit.
The invention according to claim 19 is the invention according to claims 17 and 18
In the invention described in (1), the gist of the invention is that the concealment panel is provided with closing prevention means which can enter the insertion guide means of the rotating display plate held at the open display position. (Operation) In the first aspect of the present invention, when the maintenance mechanism operation handle is mounted on the opening / closing means, the maintenance mechanism operation handle is operatively connected to the maintenance lock member. Then, the maintenance lock member is moved from the unlocked position to the locked position by the closing operation of the maintenance mechanism operation handle. As a result, it is impossible to turn on all other maintenance switching contacts that are not turned on. Therefore, it is possible to prevent a plurality of maintenance switching contacts from being simultaneously turned on.

According to the second aspect of the present invention, in addition to the operation of the first aspect of the present invention, when the maintenance mechanism operation handle is mounted on the opening / closing means and the maintenance mechanism operation handle is operated to close, the maintenance lock is released. The member is moved from the unlocked position to the locked position via the maintenance operation member. As a result,
All the maintenance operation members are rotated via the maintenance lock member to a position where it is impossible to close all other maintenance switching contacts that are not turned on. Therefore, it is possible to prevent a plurality of maintenance switching contacts from being simultaneously turned on.

According to the third aspect of the present invention, in addition to the operation of the second aspect, only when the maintenance mechanism operation handle is mounted, the closing / opening means and the maintenance operation member can be integrally rotated. . As a result, all other maintenance switching contacts that are not turned on cannot be turned on. Therefore, it is possible to prevent a plurality of maintenance switching contacts from being simultaneously turned on.

According to a fourth aspect of the present invention, in addition to the functions of the second and third aspects of the present invention, an operation lock member protrudes from the first operating member in proximity to the charging / opening means. did. As a result, when the maintenance mechanism operation handle is attached to the insertion opening means and is rotated, the maintenance mechanism operation handle and the operation lock member are engaged. Therefore, the loading mechanism and the operation lock member can be simultaneously rotated by the maintenance mechanism operation handle.

According to a fifth aspect of the present invention, in addition to the operation of the fourth aspect, when any one of the plurality of maintenance switching contacts is closed,
The operation lock members corresponding to all the maintenance opening / closing contacts are located in the usage indicating means provided on the cover covering the opening / closing means. As a result, the closing state of the maintenance switching contact is displayed outside. Therefore, the closed state of the maintenance switching contact can be checked from the outside.

According to a sixth aspect of the present invention, in addition to the functions of the fourth and fifth aspects, when any one of the plurality of maintenance switching contacts is turned on. , With the rotation of all the maintenance operating members,
The operation lock member moves from the non-interference position to the interference position.
As a result, it is impossible to attach the maintenance mechanism operation handle to the opening / closing means corresponding to another maintenance opening / closing contact that is not turned on. That is, the closing operation of all the opening / closing means corresponding to the other maintenance opening / closing contacts that are not closed is disabled.
Accordingly, it is possible to make it impossible to perform the simultaneous closing operation of a plurality of maintenance switching contacts.

According to a seventh aspect of the present invention, in addition to the operation of the sixth aspect, when any one of the plurality of maintenance switching contacts is turned on, it is not turned on. The maintenance operation members corresponding to all the maintenance opening / closing contacts rotate about the maintenance mechanism operation shaft as a fulcrum. As a result,
The operation lock member is moved to a position where the maintenance mechanism operation handle cannot be attached to the maintenance mechanism operation shaft. That is, due to the relative positional relationship between the operation lock member and the maintenance mechanism operation shaft, it is impossible to attach the maintenance mechanism operation handle to the maintenance mechanism operation shaft. Therefore, it is possible to prevent the simultaneous opening and closing of the maintenance switching contacts with a simple configuration.

According to an eighth aspect of the present invention, in addition to the operation of the first aspect of the present invention, when the guard mechanism operating handle is attached to the maintenance mechanism operating shaft, The insertion guide is guided by two engagement surfaces. Then, the maintenance mechanism operation shaft relatively enters the inserted guide means. As a result, the maintenance mechanism operation handle and the engagement surface engage with each other. Therefore, the maintenance mechanism operation shaft can be rotated by the maintenance mechanism operation handle.

According to the ninth aspect of the present invention, in addition to the functions of the seventh and eighth aspects, when one of the plurality of maintenance opening / closing contacts is operated to operate the maintenance mechanism operation shaft. , All the maintenance operation members rotate, and the operation lock member is located outside the area surrounded by the two planes. As a result, it becomes impossible to attach the maintenance mechanism operation handle to the maintenance mechanism operation shaft. Therefore, it is possible to reliably prevent the plurality of maintenance switching contacts from being simultaneously turned on.

In the tenth aspect of the present invention, in addition to the operation of the fifth aspect of the present invention, the maintenance mechanism operation handle is rotated in the range of the operation suggesting means. Then, the rotation display plate also rotates at the same time. And the insertion guide means is always positioned in the insertion / removal direction of the maintenance mechanism operation handle. As a result, the insertion / removal position of the maintenance mechanism operation handle becomes clear. Therefore, the maintenance mechanism operation handle can be smoothly operated.

According to the eleventh aspect, in addition to the function of the tenth aspect, the maintenance mechanism operation handle is inserted to a position where the operation display means is regulated by the operation suggestion means. As a result, the degree of insertion of the maintenance mechanism operation handle into the maintenance mechanism operation axis can be visually and reliably determined. Therefore, the insertion operation of the maintenance mechanism operation handle can be performed smoothly.

According to a twelfth aspect of the present invention, in addition to the operation of the tenth aspect of the present invention, the rotary display plate projects upward through the insertion guide means. It is rotated together with the operation display means. As a result, the amount of rotation of the rotation display plate can be determined based on the moving distance (position) of the operation display means. Therefore, the turning operation of the maintenance mechanism operation handle can be performed smoothly.

According to a thirteenth aspect of the present invention, in addition to the operation of the tenth aspect of the present invention, the insertion guide means is provided when the maintenance switching contact is turned on and off. , At one end and the other end of the operation suggesting means. As a result, the operation lock member of the maintenance switching contact moves along the operation suggestion means. Therefore, the operation direction of the maintenance mechanism operation handle can be visually predicted and determined.

According to a fourteenth aspect of the present invention, in addition to the effect of the tenth aspect, the maintenance mechanism operates during the turning operation of the maintenance mechanism operation handle. The operation of the mechanism operation handle in the radial direction of the rotation display plate is added. As a result, when the operation suggesting means shifts from the first stage to the second stage in the middle of the input operation, the operation suggesting means is operated until the operation in the radial direction of the rotation display plate is completed.
The turning operation of the maintenance mechanism operation handle is interrupted. Therefore, it is possible to prevent the maintenance switching contact from being turned on at once.

According to a fifteenth aspect of the present invention, in addition to the function of the tenth aspect of the present invention, when the maintenance contact is opened, the maintenance opening / closing contact is released from the operation suggestion means. The color indicating the state is exposed, and in the input state, the color indicating the input state is exposed from the operation suggestion means. As a result, the closed state of the maintenance switching contact can be identified by the color. Therefore, it is possible to easily check the closed state of the maintenance switching contact.

According to a sixteenth aspect of the present invention, in addition to the operation of the tenth aspect, when the maintenance switch is turned on, the maintenance switch is opened. Alternatively, status display means indicating insertion is displayed via the open input display means. Accordingly, it is possible to reliably confirm whether the maintenance switching contact is turned on or off.

According to the seventeenth aspect of the present invention, in addition to the functions of the ninth to sixteenth aspects, the operation display unit is concealed by a concealment panel.
Therefore, the maintenance mechanism operation unit is protected, and the appearance can be improved.

According to the eighteenth aspect, in addition to the function of the seventeenth aspect, the concealment panel is opened downward with respect to the operation display unit. As a result, when operating the maintenance mechanism operation unit, the concealment panel does not close due to its own weight or the like. Therefore, the operability of the maintenance mechanism operation section can be improved.

According to the nineteenth aspect of the present invention, in addition to the functions of the seventeenth and eighteenth aspects, when the rotary display plate is held at the open display position, the closing prevention means is inserted. It is possible to enter the guide means. As a result, the concealment panel cannot be closed when the maintenance contact is turned on. Therefore, the concealment panel can be closed only when the maintenance switching contact is turned on.

[0042]

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, the multi-circuit gas switch 11
Has a main body case 12, and a sealed case 13 as a main body is housed 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. The first to fifth main circuit terminals 17a to 17e are provided on the lower surface of the closed case 13.
Are protruding.

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. Each main circuit switching contact 31
One ends of a to 31e are connected to each other, and the other ends are respectively connected to the first to fifth main circuit terminals 17a to 17b. The main circuit terminals 17a to 17e are connected to a power supply source 33a, consumers 33b to 33d, and another multi-circuit gas switch 33e via a main cable 32a, connection cables 32b to 32d, and branch cables 32e, respectively. I have.

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 16 is connected to the first main circuit terminal 17a side of the first main circuit switching contact 31a from the power supply lead-out terminal 15 via a power transformer (not shown). Is always supplied with power from the power supply source 33a via the main cable 32a. The controller 16 outputs the first to fifth main circuit switching contacts 31a to 31e by outputting the switching signal.
This controls the automatic opening and closing of the camera.

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.

Therefore, 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 operation mechanism (not shown) of the main circuit switching contacts 31a to 31e is mechanically locked. In this state, when a closing signal of the main circuit opening / closing contacts 31a to 31e is input to the controller 16 by remote control or the like, the main circuit opening / closing contacts 31a to 31e cannot be operated due to the locking of the operation mechanism, and the automatic closing is prevented. In addition, since the signal of "OFF" to "ON" of the limit switch (not shown) is not returned, the controller 16 determines that there is an abnormality and cancels the ON command. Therefore, in the closed state of the maintenance switching contacts 34a to 34e, the automatic closing of the main circuit switching contacts 31a to 31e is prevented.

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 / opening means. The maintenance mechanism operation shaft 42 is rotatably supported at substantially the center of the sealed case 13 and is rotatably supported by the outer surface of the sealed case 13. It is projected to. On the outer periphery of the outer end of the maintenance mechanism operating shaft 42,
Flat surfaces 42a and 42b are formed as second engagement surfaces, and both flat surfaces 42a and 42b can be engaged with a maintenance mechanism operation handle described later. Both flat surfaces 42a and 42b are parallel to the axis of the maintenance mechanism operation shaft 42.

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 to 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.

As shown in FIGS. 14 (a) to 14 (c), the maintenance mechanism operating shaft 42 has a non-contact position α where all the maintenance switching contacts 34a to 34e for three phases are kept open.
Between the one-phase contact position β where only the maintenance switching contacts 34a to 34e for one phase are kept in the ON state and the three-phase contact position γ where all maintenance switching contacts 34a to 34e for three phases are kept in the ON state. It is rotatable.

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 provided so as to project in parallel with the central axis of the maintenance mechanism operation shaft 42. The outer end face of the operation lock pin 45 has a color (for example, red) indicating that the maintenance switching contacts 34a to 34e are turned on.
Is colored.

Therefore, when the operation lock pin 45 is operated by the maintenance mechanism operation handle described later, the first operation lever 43 is brought into the unlocked position A shown by the solid line in FIG. 4 and the lock position shown by the two-dot chain line in FIG. It can swing between position B (see the interlock mechanism 41b in FIG. 4).

As shown in FIG. 23, when the first operating lever 43 is held at the unlock position A, the operation lock pin 45 can attach the maintenance mechanism operation handle 91 to the maintenance mechanism operation shaft 42. It is located at the non-interference position P. When the first operating lever 43 is held at the lock position B, the operation lock pin 45 is
1 is located at an interference position Q where the maintenance mechanism operation shaft 42 cannot be mounted. That is, the operation lock pin 45 swings between the non-interference position P and the interference position Q.

The non-interference position P of the operation lock pin 45 is a region surrounded by two planes R and S respectively including the flat surfaces 42a and 42b of the maintenance mechanism operation shaft 42 held at the non-contact position α. This is the position where the operation lock pin 45 exists within T.

The interference position Q of the operation lock pin 45 is defined as a region T surrounded by two planes R and S respectively including the flat surfaces 42a and 42b of the maintenance mechanism operation shaft 42 held at the non-contact position α. The position where the operation lock pin 45 exists outside.

Therefore, when the operation lock pin 45 is held at the non-interference position P, the maintenance mechanism operation handle 91 can be mounted on the maintenance mechanism operation shaft 42 as shown in FIG. When the operation lock pin 45 is held at the interference position Q, the maintenance mechanism operation handle 91 cannot be mounted on the maintenance mechanism operation shaft 42 as shown in FIG.

The distal end of the first operating lever 43 is rotatably connected to a lock link 47 as a maintenance 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 a substantially central portion of the right side wall 53c of the lock portion 53b so as to extend in the vertical direction. The front and rear side walls 53 are adjacent to the right side wall 53c and face each other.
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.

Accordingly, when the maintenance mechanism operation shaft 42 is rotated, the lock member 53 is moved via the second operating lever 44 to the non-coupling position E shown by a solid line in FIG. 4 and the two-dot chain 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, and when the lock member 53 is held at the coordination position F, 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 an outer end portion of the main circuit drive shaft 61 projects from the closed case 13 to an outer surface. 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 attached to 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 operating 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 a closing 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-cooperative 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 regulated 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.

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 interlock mechanisms 41a to 41e are first interlock means for interlocking the maintenance switching contacts 34a to 34e, and the main circuit switching contacts 31a to 3e.
There is provided a second interlock means for interlocking between 1e and the corresponding maintenance switching contacts 34a to 34e. The first interlock means includes the first operating lever 43, the operation lock pin 45, the lock link 47, the holding spring 50, and the like. The second interlock means includes the second operating lever 44, the lock member 53, the main contact lock plate 62, and the handle operation lock plate 6.
9 and so on.

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, with the rotation of the maintenance mechanism operation shaft 42, the rotation display plate 72 can rotate between the open display position M shown in FIG. 9 and the insertion display position N shown in FIG.

When the rotation display plate 72 is held at the open display position M, the first operating lever 43 is held at the unlocked position A (see FIG. 4). In addition, the rotation display plate 7
When 2 is held at the closing display position N, the first operating lever 43 is held at the lock position B (see FIG. 4).

As shown in FIG. 8, a guide groove 74 as an insertion guide means for guiding the insertion of the maintenance mechanism operating handle 91 is formed in the rotary display plate 72 along the radial direction. Reference numeral 74 extends to the left side of the mounting portion 73 bypassing the mounting portion 73. Also, the guide groove 7
Reference numeral 4 is configured to always be located in the insertion / removal direction of the maintenance mechanism operation handle 91. The insertion / removal direction of the maintenance mechanism operation handle 91 refers to the maintenance mechanism operation handle 91.
Of the maintenance mechanism operating shaft 42.

The center and lower part of the display surface Z of the rotating display plate 72 are a color display part 72a, and the upper part of the display surface Z is a character display part 72b. The color display section 72a is further divided into the first color display section 72 with the guide groove 74 as a boundary.
c and a second color display section 72d. The first color display section 72c is colored in a color (for example, green) indicating the open state of the maintenance switching contacts 34a to 34e.
The second color display section 72d includes maintenance switching contacts 34a to 34e.
(For example, red).

In the character display section 72b, at a diagonal position between the first color display section 72c and the second color display section 72d, a state display as a state display means indicating the open and closed states of the maintenance switching contacts 34a to 34e. Characters (for example, “disconnect” and “connect”) 75a and 75b are displayed, respectively. The status display characters 75a and 75b are the first and second
It is colored with a color corresponding to the color display sections 72c and 72d (for example, green and red).

As shown in FIGS. 7 and 9, on the upper portion of the plate 71, a rotation display plate cover 76 as a cover for covering the maintenance mechanism operation shaft 42 is fixed by bolts 77. Rotating display plate 72 by plate cover 76
Are mostly coated. In the center of the upper part of the rotation display plate cover 76, a character display window 78 as an open-in display means is provided.
Are formed in the same character display window 78.
The status display characters 75a and 75b are switched and displayed with the rotation of 2.

A use display window 79 is formed below the rotary display plate cover 76, and the use operation window 79 holds the first operating lever 43 at the lock position B (see FIG. 4). It is arranged corresponding to the position of the operation lock pin 45 at the time.

That is, as shown in FIG.
Is held at the open display position M, the operation lock pin 45 is concealed by the rotation display plate cover 76, and is not located in the use display window 79. Then, as shown in FIG. 10, the operation lock pin 45 is located in the use display window 79 only when the rotation display plate 72 is held at the insertion display position N. Therefore, the closed state of the maintenance opening / closing contacts 34a to 34e can be confirmed by checking whether or not the operation lock pin 45 is located in the use display window 79.

As shown in FIG. 9, the rotation display plate cover 76
A first guide notch 80a as operation suggestion means for indicating the insertion / removal direction of the maintenance mechanism operation handle 91 is provided at a lower portion of the first guide notch 80a.
And the second guide notch 80b are formed to communicate with each other.
The first and second guide notches 80a and 80b are formed over the range of the rotation angle of the maintenance mechanism operation handle 91, and the first guide notch 80a is
It is notched deeper in the radial direction of the rotation display plate 72 than 0b. That is, the first and second guide notches 80a, 8
0b is formed in two stages, and an operation in the radial direction of the rotation display plate 72 is added.

As shown in FIG. 9, when the rotation display plate 72 is held at the open display position M, the guide groove 74 and the first color display portion 72c are in the first and second guide notches 80a, 80.
b can be exposed. Further, as shown in FIG. 10, when the rotation display plate 72 is held at the input display position N, the guide groove 74 and the first color display portion 72c are hidden by the rotation display plate cover 76, and the second color display is performed. Part 72d
Can be exposed from the first and second guide notches 80a and 80b. That is, the first and second guide notches 80a,
The closed state of the maintenance opening / closing contacts 34a to 34e can be confirmed also by the color of the rotating display plate 72 exposed from the 80b.

As shown in FIGS. 9 and 10, a ball projection 81 is provided at the center of the upper portion of the rotation display plate cover 76 with a bolt 77.
Are fastened together. The plate 7
A handle guide pin 82 as handle guide means is provided at the center of the lower part of the first unit 1 and first stopper pins 82a are provided at the center left and right.
And a second stopper pin 82b is protruded.

As shown in FIGS. 10 and 11, a concealing panel 8 is provided below the plate 71 via a hinge 83.
4 are openably and closably (open downward). The concealing panel 84 includes the rotation display plate cover 76 and the rotation display plate 72.
Covers the entire operation display unit. A ball catch 85 projects from the center of the inner surface of the concealing panel 84, and an engagement hole 85 a is formed in the center of the ball catch 85 so that the ball projection 81 can be engaged with the ball catch 85. Therefore, the ball projection 81 is engaged with the engagement hole 85a.
, The concealment panel 84 is moved to the plate 71.
It can be closed and held against the front.

A lock claw 86 is fixed in the vicinity of the center of the inner surface of the concealing panel 84, and a claw portion 86a as a closing prevention means protrudes from the right end of the lock claw 86 in FIG. The claw portion 86a is arranged corresponding to the position of the guide groove 74 of the rotating display plate 72 held at the open display position M.

Therefore, the rotation display plate 72 is in the open display position M.
, The concealing panel 84 can be closed by the claws 86a entering the guide grooves 74. Further, when the rotation display plate 72 is held at the insertion display position N, the concealment panel 84 cannot be closed and fixed because the claw portion 86a contacts the second color display portion 72d. That is, the concealment panel 84 can be closed and held only when the maintenance opening / closing contacts 34a to 34e are in the open state.

As shown in FIGS. 12 and 13, the maintenance mechanism operating handle 91 is provided with a handle 92 and a handle plate 93.
It has. The handle plate 93 is formed in an L-shape having a mounting portion 93a and a working portion 93b orthogonal to the mounting portion 93a. The upper end of the mounting portion 93a (FIG. 1)
2), a handle 92 is fixed.
An engagement notch 94 as an insertion guide means is formed at the tip of the mounting member 93a in the direction of the mounting portion 93a.

As shown in FIG. 13, the width of the engagement notch 94 is determined by the flat surfaces 42a and 42b of the maintenance mechanism operating shaft 42.
The length is set to be almost the same as the distance between them. Therefore,
The maintenance mechanism operation handle 91 is connected to the maintenance mechanism operation sections 23a to 23a.
3e, the engagement notch 94 is inserted into the maintenance mechanism operation shaft 42.
As a result, the maintenance mechanism operating shaft 42 relatively enters the engagement notch 94 as shown in FIG. The entry of the maintenance mechanism operation shaft 42 into the engagement notch 94 is regulated by the operation lock pin 45 provided close to the maintenance mechanism operation shaft 42 abutting on the innermost portion 94 a of the engagement notch 94. You.

As shown in FIG. 12 and FIG.
An operation display protrusion 95 as an operation display means whose insertion limit is regulated by the first and second guide notches 80a, 80b is provided on the upper surface of 3b. The operation display protrusion 95 is arranged near the innermost portion 94 a of the engagement notch 94.

A crank groove 97 is formed on the lower surface of the working portion 93b. The width of the crank groove 97 is set to be slightly larger than the diameter of the handle guide pin 82, and the depth of the crank groove 97 is set to be slightly deeper than the projection height of the handle guide pin 82. That is, the handle guide pin 82 is relatively movable in the crank groove 97. As a result, the maintenance mechanism operation handle 91 is operated according to the guide by the handle guide pin 82 of the crank groove 97.

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 opening / closing shaft 63 turns left (see FIG. 4) via an automatic opening / closing mechanism (not shown), and
The main circuit opening / closing lever 64 moves from the opening position J to the closing position I. 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, and the main circuit opening / closing lever 64 is moved from the open position J to the closing position I.
, And the main circuit opening / closing shaft 63 rotates leftward (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 switching contacts 34a to 34e are turned on in the closed state of the main circuit switching contacts 31a to 31e will be described with reference to FIG.
Explanation will be made according to 5.

(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. 15), 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. Accordingly, the lock member 53 is moved from the non-coupling position E (see FIG. 15) to the coupling position F (see FIG. 16).
Movement up to is allowed.

(3-2) In this state, FIGS.
As shown in FIG. 3C, when the maintenance mechanism operation shaft 42 is rotated rightward from the non-contact position α to the three-phase contact position γ via the one-phase contact position β, the maintenance switching contacts 34a to 34e (see FIG. 3). Are supplied in all three phases.

(3-3) The maintenance mechanism operating 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 unlocks 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, the handle operation shaft 68 is rotated rightward by the manual operation handle (see FIG. 16).
Then, the handle operation lock plate 69 is turned clockwise (FIG. 16).
See).

(4-3) However, the right rotation of the handle operation lock plate 69 is regulated by the contact of the handle operation lock plate 69 with the right side wall 53c 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
A case will be described in which a closing signal is output from the controller 16 by remote control or the like in the closing state of 34e. (4-6) When the maintenance opening / closing contacts 34a to 34e are turned on, the lock member 53 is held at the link position F (see the interlock mechanism 41b in FIG. 4). At this time, the right side wall 53c of the lock member 53 is located on the left side of the main circuit drive shaft 61 and the main contact lock plate 62 (FIG. 1).
6).

(4-7) In this state, when a closing signal is output from the controller 16 by remote control or the like, the main circuit drive shaft 61 rotates left (via a main circuit opening / closing mechanism (not shown)). Then, the main contact lock plate 62 is about to rotate to the left.

(4-8) However, the main contact lock plate 6
When the main contact lock plate 62 is turned to the left,
Is regulated by contacting the upper right side wall 53c (see FIG. 16). 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.

(4-9) As a result, the 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 operation of the maintenance mechanism operating section 91 when the maintenance mechanism operating sections 23a to 23e are operated by the maintenance mechanism operating handle 91 will be described with reference to FIG.
This will be described with reference to FIGS. (5-1) First, as shown in FIG. 17A, the guide groove 74 is made to correspond to the operation display projection 95, and maintenance is performed between the plate 71 and the rotation display plate 72 (see FIG. 7). The mechanism operation handle 91 is inserted. Then, the operation display protrusion 9
The maintenance mechanism operation handle 91 is pushed in until the position 5 is located at the innermost part of the guide groove 74. As a result, as shown in FIG. 20, the maintenance mechanism operation shaft 42 and the operation lock pin 45 are located within the engagement notch 94 of the maintenance mechanism operation handle 91.

At this time, the maintenance mechanism operating shaft 42 is held at the non-contact position α (see FIG. 14A), and the maintenance switching contacts 34a to 34e are held open in all three phases. Further, the first color display portion 72c of the rotation display plate 72 is exposed from the lower portion of the rotation display plate cover 76, and as a result, the open state of the maintenance switching contacts 34a to 34e is displayed outside. . Also, as shown in FIG. 22, the handle guide pin 82 is inserted into the insertion position Pa outside the crank groove 97.
It is located in.

(5-2) Next, as shown in FIG. 17B, when the maintenance mechanism operation handle 91 is rotated rightward,
The operation display projection 95 moves to the left along the innermost part of the first guide notch 80a, and is temporarily held at the leftmost end of the first guide notch 80a.

Further, at this time, as shown in FIG. 22, the handle guide pin 82 enters into the crank groove 97 with the right turning operation of the maintenance mechanism operation handle 91. The relative movement of the handle guide pin 82 in the crank groove 97 is such that the handle guide pin 82
It is regulated by contacting the regulation wall 97a (one-phase contact position Pb). As a result, the right turning operation of the maintenance mechanism operation handle 91 is once restricted by holding the handle guide pin 82 at the one-phase contact position Pb, and the operation display projection 95 is located at the innermost left end of the first guide notch 80a. Will be held once.

At this time, the maintenance mechanism operation shaft 42 rotates to the one-phase contact position β (see FIG. 14B), and the maintenance switching contacts 34a to 34e receive one of the three phases. Further, the rotation display plate 72 rotates rightward together with the maintenance mechanism operation shaft 42, and the second color display portion 72d concealed by the rotation display plate cover 76 is exposed from below the first guide notch 80a. As a result, the one-phase contact state of the maintenance switching contacts 34a to 34e is externally displayed.

(5-3) Next, as shown in FIG. 17C, when the maintenance mechanism operation handle 91 is pulled down, the operation display projection 95 moves along the left edge of the first guide notch 80a. It moves downward and is held to the right of the second guide notch 80b outside the first guide notch 80a.

At this time, as shown in FIG. 22, the one-phase contact position P
b is located in the crank groove 97
Along the right side in FIG. The relative movement of the handle guide pin 82 to the right is regulated by the contact of the handle guide pin 82 with the second regulation wall 97b of the crank groove 97 (interval position Pc). As a result, the handle guide pin 82 is
c, and the operation display projection 95 is in the first guide notch 80.
The second guide notch 80b outside the position a is held to the right.

At this time, the maintenance mechanism operation shaft 42 does not rotate but is held at the one-phase contact position β (see FIG. 14B), and the maintenance switching contacts 34a to 34e are turned on for only one phase. Is kept in the state. The second color display section 7
2d also does not rotate and is kept in the exposed state. (FIG. 17
(See (c).) (5-4) Next, as shown in FIG. 17D, when the maintenance mechanism operation handle 91 is further turned to the right, FIG.
As shown in FIG. 22, the handle guide pin 82 located at the interval position Pc relatively moves downward in FIG. 22 along the second regulating wall 97b, and is held at the three-phase contact position Pd outside the crank groove 97. The right rotation of the maintenance mechanism operation handle 91 is restricted by the engagement of the handle plate 93 with the first stopper pin 82a.

At this time, the maintenance mechanism operation shaft 42 further rotates clockwise, is held at the three-phase contact position γ (see FIG. 14C), and the remaining two phases of the maintenance switching contacts 34a to 34e. Is input. The operation display projection 95 moves leftward along the second guide notch 80b, and is held at the left end of the second guide notch 80b.

Further, the second color display section 72d is exposed on the entire surface of the first guide notch 80a, and the first color display section 72c is completely hidden by the rotating display plate cover 76. As a result, the three-phase contact state of the maintenance switching contacts 34a to 34e is displayed outside.

Further, the first operation lever 43 is held at the lock position B, and the operation lock pin 45 is located in the use display window 79 of the rotation display plate cover 76. As a result, the inoperable state of the maintenance mechanism operation units 23a to 23e (see FIGS. 1 and 11) is displayed outside.

(5-5) By the above operation, all the closing operations of the maintenance switching contacts 34a to 34e are completed. (5-6) When opening the maintenance switching contacts 34a to 34e, the operations described in (5-1) to (5-4) are performed in reverse. When the maintenance opening / closing contacts 34a to 34e are opened, the left rotation of the maintenance mechanism operation handle 91 is restricted by the engagement of the handle plate 93 with the second stopper pin 82b.

Next, the operation of the interlock mechanisms 41a to 41e between the maintenance switching contacts 34a to 34b when the maintenance switching contacts 34a to 34e are turned on will be described with reference to FIGS.

(6-1) As shown in FIG. 18, when the maintenance switching contacts 34a to 34e are open, the maintenance mechanism operation units 23a to 23e (in FIG. 18, the maintenance mechanism operation unit 23e
Are omitted), all of the maintenance mechanism operation shafts 42 are in the non-contact position α.
(See FIG. 14). That is, all the first operation levers 43 are held at the unlocked position A,
The operation lock pin 45 is held at the non-interference position P (see FIG. 23A).

Therefore, the maintenance mechanism operation handle 91 can be attached to all the maintenance mechanism operation sections 23. In other words, as shown in FIG. 20, the maintenance mechanism operation shaft 42 and the operation lock pin 45 can relatively enter the engagement notch 94 of the maintenance mechanism operation handle 91.

(6-2) Then, as shown in FIG. 19, any one of the plurality of maintenance mechanism operation sections 23a to 23e (the maintenance mechanism operation section 23b in the present embodiment) is connected to the (5-1). The charging operation is performed according to the operation described in (5-4).

Then, as shown in FIG. 4, the first operating lever 43 corresponding to the maintenance mechanism operating portion 23b rotates from the unlocked position A to the locked position B. Further, the first operating levers 43 corresponding to the maintenance mechanism operating sections 23a, 23c to 23d also rotate from the unlocked position A to the locked position B via the lock link 47.

As a result, the operation lock pin 45 of the maintenance mechanism operation unit 23b that has been operated to be moved is moved into the use display window 79, and the operation of all the other maintenance mechanism operation units 23a, 23c to 23e that are not operated is performed. The lock pin 45 is also moved into the use display window 79. That is, the operation lock pin 4
5 is held at the interference position Q (see FIG. 23B).

(6-3) As shown in FIG. 21, the operation lock pin 45 held in the use display window 79, that is, the operation lock pin 45 held at the interference position Q is located within the insertion locus of the maintenance mechanism operation handle 91. . As a result, the maintenance mechanism operation handle 9
Insertion of the first maintenance mechanism operating portions 23a, 23c to 23e is restricted by engaging the distal end of the handle plate 93 with the operation lock pin 45. Therefore, the maintenance mechanism operating unit 2 other than the maintenance mechanism operating unit 23b that has been operated to be turned on.
3a, 23c to 23e include a maintenance mechanism operation handle 91.
Are not mountable, and a plurality of maintenance switching contacts 34a-
It is possible to prevent the simultaneous inputting of 34e.

Therefore, according to the present embodiment, the following effects can be obtained. The first operation lever 43 is rotatably attached to the maintenance mechanism operation shaft 42, and only when the maintenance mechanism operation handle 91 is mounted on the maintenance mechanism operation shaft 42, both the two 42, 43.
Are configured to be integrally rotatable. As a result, when one maintenance opening / closing contact (in this embodiment, maintenance opening / closing contact 34b) is turned on by the maintenance mechanism operating handle 91, all other maintenance opening / closing contacts that are not turned on (in this embodiment) are interlocked with this. In the configuration, 34a, 34c to 34e) are not allowed to be input. Therefore, only by operating the maintenance mechanism operation handle 91, the maintenance opening / closing contacts 34a to 34e can be locked so as not to be closed.

[0143] In the vicinity of the maintenance mechanism operation shaft 42, the first
An operation lock pin 45 protrudes from the operating lever 43, and the maintenance mechanism operation shaft 42 and the operation lock pin 45 can be simultaneously rotated by a maintenance mechanism operation handle 91. That is, when the maintenance mechanism operation handle 91 is attached to the maintenance mechanism operation shaft 42 and rotated, the maintenance mechanism operation handle 91 and the operation lock member 45 are engaged. As a result, the maintenance mechanism operation shaft 42 and the operation lock pin 45
With the rotation of the maintenance mechanism operation handle 91, the rotation is simultaneously performed. Therefore, one maintenance switching contact (in this embodiment,
Simultaneously with the closing of 34b), other maintenance switching contacts (34a, 34c to 34e in this embodiment) that are not closed can be locked so that they cannot be closed.

Any one of the maintenance switching contacts 34a to 34e (in this embodiment,
34b), all maintenance switching contacts 34
The operation lock pins 45 corresponding to “a” to “34e” are configured so as to be located in a use display window 79 formed in the rotation display plate cover 76. As a result, the plurality of maintenance switching contacts 34a
To 34e, the closed state of any one of the maintenance switching contacts (34b in the present embodiment) is displayed externally. Therefore, the closed state of the maintenance switching contacts 34a to 34e can be checked from the outside.

Any one of the maintenance switching contacts 34a to 34e (in this embodiment,
All the first operating levers 43 are configured to rotate from the unlocked position A to the locked position B when the maintenance opening / closing contact 34b) is turned on. Also, the first operating lever 43
23, the operation lock pin 45 moves from the non-interference position P (see FIG. 23A) to the interference position Q (FIG. 23B).
Reference). Then, other maintenance switching contacts that are not turned on (34a, 34c in the present embodiment)
34e), the maintenance mechanism operation handle 91 cannot be attached to the maintenance mechanism operation shaft 42. As a result, the closing operation of all the maintenance mechanism operation shafts 42 corresponding to the other maintenance opening / closing contacts (34a, 34c to 34e in this embodiment) that are not turned on is disabled.
Therefore, it is possible to disable the simultaneous switching operation of the plurality of maintenance switching contacts 34a to 34e.

The structure in which the maintenance mechanism operation handle 91 cannot be attached to the maintenance mechanism operation shaft 42 is such that the relative positional relationship between the operation lock pin 45 and the maintenance mechanism operation shaft 42 is
The maintenance mechanism operation handle 91 cannot be mounted. That is, among the plurality of maintenance switching contacts 34a to 34e,
When any one of the maintenance switching contacts (in this embodiment, maintenance switching contact 34b) is turned on, all other maintenance switching contacts that are not turned on (in this embodiment, 34a, 34c to 3c-3).
The first operation lever 43 corresponding to 4e) rotates about the maintenance mechanism operation shaft 42 as a fulcrum. As a result, the operation lock pin 4
5 is moved to an interference position Q (see FIG. 23B) at which the attachment of the maintenance mechanism operation handle 91 to the maintenance mechanism operation shaft 42 becomes impossible. Therefore, simultaneous opening of the maintenance switching contacts 34a to 34e can be prevented with a simple configuration.

Two flat surfaces 42a and 42b are formed at the attachment position of the maintenance mechanism operation handle 91 on the maintenance mechanism operation shaft 42. Further, an engagement notch 94 is formed in the maintenance mechanism operation handle 91 along the flat surfaces 42a and 42b. That is, the guard mechanism operation handle 91
When attaching to the maintenance mechanism operation shaft 42, the engagement notch 94
Are guided by the flat surfaces 42a and 42b, and the maintenance mechanism operation shaft 42 relatively enters the engagement notch 94. As a result, the maintenance mechanism operation handle 91 and the flat surfaces 42a and 42b engage with each other. Therefore, the maintenance mechanism operation shaft 42 can be rotated by the maintenance mechanism operation handle 91.

The relative positional relationship between the maintenance mechanism operation shaft 42 and the operation lock pin 45 that disables attachment of the maintenance mechanism operation handle 91 to the maintenance mechanism operation shaft 42 includes each of the flat surfaces 42a and 42b. The operation lock pin 45 is located outside the region T surrounded by the two planes R and S. That is, when any one of the maintenance switching contacts 34a to 34e (in this embodiment, the maintenance switching contact 34b) is turned on, all the first operating levers 43 are locked from the unlocked position A. While rotating to the position B, the operation lock pin 45
Moves from the non-interference position P (see FIG. 23A) to the interference position (see FIG. 23B). As a result, attachment of the maintenance mechanism operation handle 91 to the maintenance mechanism operation shaft 42 becomes impossible. Therefore, the plurality of maintenance switching contacts 3
Simultaneous injection of 4a to 34e can be prevented.

The first and second guide notches 80a, 80b indicating the insertion / removal direction of the maintenance mechanism operation handle 91 are provided on the rotation display plate cover 76 over the rotation angle range of the maintenance mechanism operation handle 91. Provided. The maintenance mechanism operation shaft 42 is provided with a rotation display plate 72 that is rotatable with the rotation of the maintenance mechanism operation handle 91. A guide groove 74 for guiding insertion was formed. When the maintenance mechanism operation handle 91 rotates in the range of the first and second guide notches 80a and 80b, the rotation display plate 72 also rotates at the same time, and the guide groove 74 always keeps the maintenance mechanism operation handle 91.
It is configured to be located in the insertion / removal direction of the. As a result,
The insertion / removal position of the maintenance mechanism operation handle 91 becomes clear. Therefore, the maintenance mechanism operation handle 91 can be smoothly operated.

The maintenance mechanism operation handle 91 is provided with an operation display projection 95 whose insertion limit is regulated by the first and second guide notches 80a and 80b. That is, in the maintenance mechanism operation handle 91, the operation display protrusion 95 has the first and second operation display protrusions 95.
It is inserted up to the position regulated by the guide notches 80a, 80b. As a result, the degree of insertion of the maintenance mechanism operation handle 91 into the maintenance mechanism operation shaft 42 can be visually and reliably determined. Therefore, the insertion operation of the maintenance mechanism operation handle 91 can be performed smoothly.

The operation display projection 95 is projected upward through the guide groove 74, and the rotation display plate 72 is
5. As a result, the amount of rotation of the rotation display plate 72 can be determined based on the moving distance (position) of the operation display protrusion 95. Therefore, the rotation operation of the maintenance mechanism operation handle 91 can be performed smoothly.

The guide groove 74 is provided for the maintenance switching contact 34a.
The first and second guide means 80a, 80b are located at one end and the other end when the first through third guides 34e and 34e are charged and opened. As a result, the operation lock pin 45 of the maintenance switching contacts 34a to 34e moves along the first and second guide means 80a and 80b. Therefore, the operation direction of the maintenance mechanism operation handle 91 can be visually predicted and determined.

The first and second guide notches 80a, 80
b is formed in two stages having different depths, and an operation in the radial direction of the rotation display plate 72 of the maintenance mechanism operation handle 91 is added during the rotation operation of the maintenance mechanism operation handle 91. . As a result, when shifting from the first guide notch 80a to the second guide notch 80b during the closing operation, the rotation of the maintenance mechanism operation handle 91 until the operation in the radial direction of the rotation display plate 72 is completed. Operation is interrupted. Therefore, it is possible to prevent the maintenance switching contacts 34a to 34e from being turned on all at once.

When the maintenance switching contacts 34a-34b are open, the first and second guide notches 80a, 80b
The rotating display plate 72 is colored such that the color indicating the open state (green in the present embodiment) is exposed from the, and in the closed state, the color indicating the closed state (red in the present embodiment) is exposed. As a result, the closed state of the maintenance switching contacts 34a to 34e can be identified by color. Therefore, the maintenance switching contact 3
The input state of 4a to 34e can be easily confirmed.

A character display window 78 for displaying the opening or closing of the maintenance opening / closing contacts 34a to 34b is formed in a part of the rotation display plate cover 76. Also, the rotation display plate 72
Are provided with status display characters 75a and 75b indicating opening or closing of the maintenance switching contacts 34a to 34b through the character display window 78. That is, the maintenance switching contact 3
4a to 34b are turned on, maintenance switching contacts 34a to 3
Status display characters 75a, 75b indicating opening or closing of 4b
Is displayed via the character display window 78. Therefore, it is possible to reliably check whether the maintenance switching contacts 34a to 34e are turned on or off.

A concealing panel 84 that covers the entire operation display sections 72 and 76 composed of the rotation display plate cover 76 and the rotation display plate 72 is provided so as to be openable and closable. That is, the operation display sections 72 and 76 are concealed by the concealment panel 84. Therefore,
The operation display sections 72 and 76 are protected and the appearance can be improved.

The concealment panel 84 is used for the maintenance mechanism operation unit 7
Below 2,76, it was attached to the closed case 13.
That is, the concealment panel 84 opens downward with respect to the operation display units 72 and 76. As a result, when operating the maintenance mechanism operation shaft 42, the concealment panel 84 does not close due to its own weight or the like. Therefore, the closing operability by the maintenance mechanism operation handle 91 can be improved.

The concealing panel 84 has an open display position M
A claw portion 86a is provided so as to be able to enter the guide groove 74 of the rotation display plate 72 which is held by the motor. That is, when the rotation display plate 72 is held at the open display position M, the claw portion 86a can enter the guide groove 74. As a result, when the maintenance switching contacts 34a to 34e are turned on, the concealing panel 84 is closed.
Is considered non-closable. Therefore, the maintenance switching contacts 34a-
The concealing panel 84 can be closed only in the closed state of 34e.

A one-phase leading-in structure in which one of the three phases at the maintenance switching contacts 34a to 34e is turned on first, and then the remaining two phases are turned on after a predetermined time. The predetermined time is, as shown in FIG.
This is the time required for the handle guide pin 82 to move relative to the crank groove 97 from the one-phase contact position Pb to the three-phase contact position Pd. As a result, for example, when the interlock mechanisms 41a to 41e fail, the main circuit switching contact 3
In the closed state of 1a-31e, the maintenance switching contacts 34a-34
If only one phase is turned on, a one-phase ground fault will occur, but the main power supply will be turned off at the substation until the remaining two phases are turned on (during the predetermined time). It is possible to shut off. That is, the power source is shut off at the stage of the one-phase ground fault, thereby preventing the ground fault from developing into a short-circuit fault. If, for example, the main circuit switching contacts 31a to 31e are closed and the maintenance switching contacts 34a to 34e are simultaneously turned on in three phases, such as when the interlock mechanisms 41a to 41e are out of order, a short circuit accident will occur and a large accident will be caused. It will be. Therefore, in the maintenance switching contacts 34a to 34e, 3
The safety of the multi-circuit gas switch 11 can be improved as compared with the case of simultaneous injection.

The lock member 53 and the lock link 47 are linked to 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. The lock link 47 is moved from the unlocked position C to the locked position D while moving to the position F. Conversely, when the main circuit switching contacts 31a to 31e are turned on while the maintenance switching contacts 34a to 34e are open, the main contact locking plate 62
Move from the opening position H to the charging position G.
As a result, the main circuit opening / closing contact 31b corresponding to the maintenance opening / closing contact 34b, and the other maintenance opening / closing contacts 34 that are not closed.
a, 34c to 34e cannot be charged. 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 to 31e and the maintenance switching contacts 34a corresponding to the respective main circuit switching contacts 31a to 31e.
To the main circuit switching contacts 31a to 31e and the maintenance switching contacts 34a to 34e corresponding to the main circuit switching contacts 31a to 31e.
At the same time. Further, only one of the maintenance opening / closing contacts 34a to 34e can be turned on, so that simultaneous opening of the maintenance opening / closing contacts 34a to 34e can be prevented.

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 operating lever 44 for interlocking the lock member 53 so as to be vertically movable 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, when the maintenance mechanism operation shaft 42 is turned on by the maintenance mechanism operation handle 91, the second operating lever 44 rotates integrally with the maintenance mechanism operation shaft 42, and corresponds to the maintenance mechanism operation shaft 42 that has been turned on. The lock member 53 moves up and down between the non-coupling position E and the coordination position F. When the maintenance mechanism operation shaft 42 is turned on, the lock link 47 is moved to the first operation lever 43.
Is moved horizontally between the unlocked position C and the locked position D via the lock lever 47, and in conjunction with the horizontal movement of the lock link 47, the other first actuating lever 43, which is not closed, is locked to the unlocked position A and locked. It swings between 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.

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

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 is operated in a direction for holding the lock link 47 at the unlocked position D. 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 the unlocked position C and the locked position D. 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 attached 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.

An operation display projection 95 is provided on the maintenance mechanism operation handle 91, and first and second guide notches 80a and 80b are formed on the rotation display plate cover 76. Then, with the operation of the maintenance mechanism operation handle 91, the operation display projection 95 moves along the first and second guide notches 80a and 80b. As a result, the operation direction of the maintenance mechanism operation handle 91 can be visually determined and predicted. Therefore, the operation of the maintenance mechanism operation handle 91 can be performed smoothly.

The maintenance mechanism operation handle 91 has a crank groove 97 for regulating the operation direction of the maintenance mechanism operation handle 91, and the maintenance mechanism operation handle 91 is provided with a handle guide in which the crank groove 97 is provided in the closed case 13. Operable according to the guide of the pin 82. That is, in the maintenance mechanism operation handle 91, the crank groove 97 is operated according to the guide of the handle guide pin 82. As a result, the operation of the maintenance mechanism operation handle 91 in a direction in which the crank groove 97 does not follow the handle guide pin 82 becomes impossible. Therefore, erroneous operation of the maintenance mechanism operation handle 91 can be prevented.

The above embodiment may be modified as follows. As shown in FIG. 24, a plurality of operation lock pins 45 are protruded from the lock link 47 at predetermined intervals in the longitudinal direction. Each operation lock pin 45 is connected to each maintenance mechanism operation shaft 42.
Are parallel to the flat surfaces 42a and 42b, and are disposed on an extension line O passing through the axis of the maintenance mechanism operation shaft 42. When the maintenance mechanism operation handle 91 is mounted on the maintenance mechanism operation shaft 42, the maintenance mechanism operation shaft 42 and the operation lock pin 45 are positioned so that the maintenance mechanism operation shaft 42 and the operation lock pin 45 are located in the engagement notches 94 of the maintenance mechanism operation handle 91. The length of the notch 94 is set. That is, the maintenance mechanism operation handle 91 is operatively connected to the lock link 47 via the operation lock pin 45 only when the maintenance mechanism operation handle 91 is mounted on the maintenance mechanism operation shaft 42. Constitute.
Further, the maintenance mechanism operation handle 91 is formed such that one of the two forks via the engagement notch 94 protrudes in the distal direction.
The use display window 79 of the rotation display plate cover 76 is formed corresponding to the position of the operation lock pin 45 when the lock link 47 is held at the lock position D.

Even in this case, similarly to the present embodiment,
When one maintenance open / close contact (maintenance open / close contact 41b in FIG. 24) is turned on by the maintenance mechanism operation handle 91, all the operation lock pins 45 move to positions where the maintenance mechanism operation handle 91 can be prevented from being mounted. . Therefore, it is possible to prevent the plurality of maintenance switching contacts 34a to 34e from being simultaneously turned on.

As shown in FIG. 25, the first operation lever 43 is rotatably mounted on a shaft 100 different from the maintenance mechanism operation shaft 42, and the first operation lever 43 is It is arranged so as to be located within the input operation trajectory. When the maintenance mechanism operation handle 91 is mounted on the maintenance mechanism operation shaft 42, the maintenance mechanism operation shaft 42 and the operation lock pin 45 of the first operating lever 43 are located in the engagement notch 94 of the maintenance mechanism operation handle 91. The length of the engagement notch 94 is set so as to be positioned. That is, only when the maintenance mechanism operation handle 91 is mounted on the maintenance mechanism operation shaft 42,
The lock link 47 is configured to be linked from the unlocked position C to the locked position D via the first operating lever 43. The maintenance mechanism operation handle 91 is provided with an engagement notch 94.
One of the two forks is formed so as to protrude in the distal direction. The use display window 79 of the rotation display plate cover 76 is formed corresponding to the position of the operation lock pin 45 when the lock link 47 is held at the lock position D.

In this case, as in the present embodiment,
When one maintenance opening / closing contact (the maintenance opening / closing contact 41b in FIG. 25) is turned on by the maintenance mechanism operation handle 91, all the operation lock pins 45 move to positions where the maintenance mechanism operation handle 91 can be prevented from being mounted. . Therefore, it is possible to prevent the plurality of maintenance switching contacts 34a to 34e from being simultaneously turned on.

As shown in FIG. 26, the flat surfaces 42a and 42b of the maintenance mechanism operation shaft 42 are formed so as to form an angle θ with each other, and the engagement notch 94 of the maintenance mechanism operation handle 91 is formed with the flat surfaces 42a and 42b. May be formed corresponding to the angle θ. Even in this case, the flat surfaces 42 a and 42 b and the engagement notch 94 can be engaged with each other, and the maintenance mechanism operation shaft 42 is
Can be rotated.

The maintenance mechanism operation handle 91 is not disabled, but the maintenance mechanism operation shaft 42 can be closed. However, even if the maintenance mechanism operation shaft 42 is closed, the maintenance opening / closing contacts 34a, 34c to 34e are closed. May be provided. Even in this case, simultaneous switching between the maintenance switching contacts 34a to 34e can be prevented.

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 when the manual open operation is performed. May be provided. Even in this case, the maintenance switching contact 34b which is turned on and the main circuit switching contact 3 corresponding thereto
1b can be prevented from being simultaneously injected.

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. (1) The maintenance mechanism operation handle (91) is provided with a handle guide means (97) for regulating an operation direction of the maintenance mechanism operation handle (91), and the maintenance mechanism operation handle (91) is provided with a handle guide means. (97) is the main body (1
20. The maintenance mechanism operation handle for a multi-circuit switch according to any one of claims 1 to 19, wherein the handle can be operated according to a guide of a handle guide means (82) provided in 3).

(2) The handle guide means (97)
Is a crank-shaped groove formed in the maintenance mechanism operation handle (91). The maintenance mechanism operation handle of the multi-circuit switch according to the above (1).

According to the invention described in the above items (1) and (2), the maintenance mechanism operation handle (91) is operated in accordance with the guide of the handle guide pin 82 provided in the closed case 13 with the crank groove 97. You. As a result, the operation of the maintenance mechanism operation handle 91 in a direction in which the crank groove 97 does not follow the handle guide pin 82 becomes impossible. Therefore, erroneous operation of the maintenance mechanism operation handle 91 can be prevented.

(3) The plurality of maintenance switching contacts (34a
To 34e), one of the three phases is charged,
20. The multi-circuit switch according to any one of claims 1 to 19, wherein the switch has a one-phase preceding input structure in which the remaining two phases are input after a predetermined time has elapsed.

(4) The predetermined time in the above item (3) refers to the rotation display plate (7) of the maintenance mechanism operation handle (91).
2) The multi-circuit switch according to the above item (3), which is a time from the start of operation in the radial direction to the end of operation.

According to the inventions described in the above items (3) and (4), the safety of the multi-circuit switch (11) can be improved without turning on all three phases at the same time. (5) In conjunction with the closing operation of any one of the plurality of maintenance opening / closing contacts (34a to 34e), the main circuit opening / closing contact corresponding to the maintenance opening / closing contact that has been operated, and the closing operation not being performed. Of the main circuit switching contacts (31a to 31e), and when any one of the plurality of main circuit switching contacts (31a to 31e) is closed, the main circuit switching contacts are closed. A multi-circuit switch including an interlock mechanism (41a to 41e) for locking a corresponding maintenance opening / closing contact so as not to be closed or a closed operation. Also in this case, it is possible to prevent simultaneous switching of the main circuit switching contact and the maintenance switching contact corresponding to each main circuit switching contact, and prevent simultaneous switching of the maintenance switching contact.

(6) A plurality of maintenance switching contacts (34a-3)
4e), when any one of the maintenance switching contacts is turned on, the maintenance lock member (47) is moved to the unlocked position (C).
Interlocking method between the maintenance switching contacts, wherein the switching from the maintenance switching contacts to the locking position (D) is performed, and all other maintenance switching contacts that are not switched on are disabled. With this configuration, simultaneous switching between the plurality of switching contacts can be prevented.

[0184]

According to the first aspect of the present invention, it is impossible to turn on all other maintenance switching contacts that are not switched on, thereby preventing simultaneous switching on of a plurality of maintenance switching contacts.

According to the second aspect of the present invention, all the maintenance operation members are turned to the position where it is impossible to turn on all the other maintenance opening / closing contacts that are not turned on via the maintenance lock member. Thereby, simultaneous switching on of a plurality of maintenance switching contacts can be prevented.

According to the third aspect of the present invention, when one maintenance switching contact is turned on, all the other maintenance switching contacts that are not turned on are disabled from being turned on. Simultaneous injection can be prevented.

According to the fourth aspect of the present invention, the opening / closing means and the operation lock member can be simultaneously rotated by the maintenance mechanism operation handle. According to the fifth aspect of the present invention, the closed state of the maintenance switching contact is externally displayed, so that the closed state of the maintenance switching contact can be confirmed from the outside.

According to the sixth aspect of the present invention, since the closing operation of all the opening / closing means corresponding to the other maintenance opening / closing contacts that are not turned on cannot be performed, the simultaneous closing operation of a plurality of maintenance opening / closing contacts is disabled. Can be impossible.

According to the seventh aspect of the present invention, it is impossible to attach the maintenance mechanism operation handle to the maintenance mechanism operation shaft due to the relative positional relationship between the operation lock member and the maintenance mechanism operation shaft. With a simple configuration, simultaneous switching of maintenance switching contacts can be prevented.

According to the eighth aspect of the present invention, the maintenance mechanism operation handle and the parallel portion are engaged with each other,
The maintenance mechanism operation shaft can be rotated by the maintenance mechanism operation handle.

According to the ninth aspect of the present invention, since the maintenance mechanism operation handle cannot be attached to the maintenance mechanism operation shaft, it is possible to reliably prevent a plurality of maintenance switching contacts from being simultaneously turned on. .

According to the tenth aspect of the present invention, since the insertion / removal position of the maintenance mechanism operation handle becomes clear, the maintenance mechanism operation handle can be operated smoothly. According to the invention described in claim 11, the degree of insertion of the maintenance mechanism operation handle into the maintenance mechanism operation shaft is visually determined.
In addition, since it is possible to make a reliable determination, the insertion operation of the maintenance mechanism operation handle can be performed smoothly.

According to the twelfth aspect of the present invention, it is possible to determine the amount of rotation of the rotation display plate based on the moving distance (position) of the operation display means. The operation can be performed smoothly.

According to the thirteenth aspect of the present invention, the operation lock member of the maintenance opening / closing contact moves along the operation suggestion means, thereby visually predicting / determining the operation direction of the maintenance mechanism operation handle. can do.

According to the fourteenth aspect of the present invention, when the operation suggesting means shifts from the first stage to the second stage in the course of the throwing operation, the operation suggesting means is operated until the operation in the radial direction of the rotating display plate is completed. Meanwhile, the turning operation of the maintenance mechanism operation handle is interrupted, so that the maintenance opening / closing contact can be prevented from being turned on at once.

According to the fifteenth aspect of the present invention, the closed state of the maintenance switching contact can be identified by the color, so that
The ON / OFF state of the maintenance switching contact can be easily checked. According to the invention of claim 16, when the maintenance switching contact is turned on, the status display means indicating the opening or closing of the maintenance switching contact is displayed via the opening / closing display means, so that the maintenance switching contact is displayed. Can be surely confirmed.

According to the seventeenth aspect, the operation display section is concealed by the concealment panel, so that the maintenance mechanism operation section is protected and the appearance can be improved.
According to the invention described in claim 18, when the maintenance mechanism operation unit is operated, the concealment panel is not closed by its own weight or the like, so that the operability of the maintenance mechanism operation unit can be improved.

According to the nineteenth aspect of the present invention, the concealment panel cannot be closed when the maintenance switch is turned on, so that the concealment panel can be closed only when the maintenance switch is turned on. it can.

[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, and FIG. 6B is a schematic right side view of a main part of a lock member.

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

FIG. 8 is a front view of the rotation display plate.

FIG. 9 is a front view of a maintenance mechanism operation unit.

FIG. 10 is a front view of a maintenance mechanism operation unit.

FIG. 11 is a front view of a maintenance mechanism operation unit.

FIG. 12 is a front view of a maintenance mechanism operation handle.

FIG. 13 is a bottom view of the maintenance mechanism operation handle.

14A is an enlarged front view of a main part of the interlock mechanism showing a non-contact position of the maintenance mechanism operation shaft, and FIG. 14B is a main part of the interlock mechanism showing a one-phase contact position of the maintenance mechanism operation shaft. FIG. 3C is an enlarged front view of a main part of the interlock mechanism, showing a three-phase contact position of a maintenance mechanism operation shaft.

FIG. 15 is an enlarged front view of a main part of the interlock mechanism.

FIG. 16 is an enlarged front view of a main part of the interlock mechanism.

17A is a front view of the maintenance mechanism operation unit showing a first-stage operation of the maintenance mechanism operation handle, and FIG. 17B is a front view of the maintenance mechanism operation unit showing a one-phase contact state of the maintenance mechanism operation handle. FIG. 3C is a front view of the maintenance mechanism operation unit showing a second stage operation of the maintenance mechanism operation handle, and FIG. 4D is a front view of the maintenance mechanism operation unit showing a three-phase contact state of the maintenance mechanism operation handle.

FIG. 18 is a front view of a main part of a maintenance mechanism operation unit in a maintenance circuit open state.

FIG. 19 is a front view of a main part of the maintenance mechanism operation unit after only one maintenance circuit is turned on.

FIG. 20 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. 21 is a front view of a main part of a 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.

FIG. 22 is a plan view of a main part of the maintenance mechanism operation handle showing a relative positional relationship between the crank groove and the handle guide pin.

FIG. 23 is an enlarged front view of a main part of the interlock mechanism, showing a relative positional relationship between a maintenance mechanism operation shaft and an operation lock pin.

FIG. 24 is a front view of a main part of an interlock mechanism according to another embodiment.

FIG. 25 is a front view of a main part of an interlock mechanism according to another embodiment.

FIG. 26 is a main part front view showing a correlation between a maintenance mechanism operation shaft and a maintenance mechanism operation handle in another embodiment.

FIG. 27 is a schematic circuit diagram of a multi-circuit gas switch.

[Explanation of symbols]

11: Multi-circuit gas switch (multi-circuit switch), 13: sealed gas case (main body), 31a to 31e: main circuit switching contact, 34a to 34e: maintenance switching contact, 41a to 41e ...
Interlock mechanism, 42: maintenance mechanism operation shaft (injection opening means), 42a, 42b: flat surface (first and second engagement surfaces), 43: first operation lever (maintenance operation member), 45
... operation lock pin (operation lock member), 47 ... lock link (maintenance lock member), 44 ... second operation lever (main operation member), 50 ... holding spring (holding means), 53 ... lock member (first lock member) ), 74: guide groove (insertion guide means), 75a, 75b: status display characters (status display means), 76: rotating display plate cover (cover), 78: character display window (open-in display means), 79 ... Use display characters (use display means), 80a, 80b: first and second guide notches (operation suggestion means), 82: handle guide pins (handle guide means), 86a: claw portions (close prevention means), 9
DESCRIPTION OF SYMBOLS 1 ... Maintenance mechanism operation handle, 94 ... engagement notch (inserted guide means), 95 ... operation display protrusion (operation display means), 9
7 ... Crank groove (handled guide means), C ... Unlocked position (47), D ... Locked position (47), E ... Unlinked position (53), F ... Linked position (53), M ... Open display position (72), N: input display position (72), Y: vertical position (43).

Claims (19)

[Claims] 1. A plurality of maintenance switching contacts (34a to 34e).
When any one of the maintenance switching contacts is turned on, the maintenance lock member (47) common to the maintenance switching contacts (34a to 34e) is moved from the unlocked position (C) to the locking position (D). Interlock mechanism (41a-4) that disables the closing of all other maintenance switching contacts that are not closed
In the multi-circuit switch (11) provided with 1e), each opening / closing means (42) for opening / closing each maintenance switching contact (34a to 34e) is provided with a maintenance mechanism operating handle (9).
The maintenance mechanism operation handle (91) is attached to the maintenance lock member (47) only when the maintenance mechanism operation handle (91) is mounted on the loading / opening means (42). A multi-circuit switch configured to be operatively connected to the main body and to be linked from the unlocked position (C) to the locked position (D) by the closing operation of the maintenance mechanism operation handle (91). 2. The trajectory of the maintenance mechanism operating handle (91) mounted on the opening and closing means (42) includes:
A maintenance operation member (43) for operating the maintenance lock member (47) is provided, and the maintenance mechanism operation handle (91) and the maintenance operation member (4) are provided.
3), the maintenance operation member (43) can be rotated, and the maintenance mechanism operation handle (91) can be rotated only when the maintenance mechanism operation handle (91) is attached to the loading / opening means (42). The closing operation of the mechanism operating handle (91) causes the maintenance lock member (4).
7. The multi-circuit switch according to claim 1, wherein 7) is configured to be linked from the unlock position (C) to the lock position (D) via the maintenance operation member (43). 3. The maintenance operating member (43) is rotatably attached to the opening / closing means (42), and only when the maintenance mechanism operation handle (91) is mounted on the opening / opening means (42). 3. The multi-circuit switch according to claim 2, wherein the two switches are configured to be integrally rotatable. 4. In the vicinity of the charging / opening means (42),
An operation lock member (45) is protruded from the maintenance operation member (43), and the insertion opening means (42) and the operation lock member (45) can be simultaneously rotated by a maintenance mechanism operation handle (91). A multi-circuit switch according to claim 2 or claim 3. 5. A plurality of maintenance switching contacts (34a-34e).
When any one of the maintenance opening / closing contacts is turned on, all the maintenance opening / closing contacts (34a) are provided in the usage display means (79) provided on the cover (76) covering the opening / closing means.
5. The multi-circuit switch according to claim 4, wherein the operation lock member (45) corresponding to the positions (e) to (e) is located. 6. A plurality of maintenance switching contacts (34a to 34e).
When any one of the maintenance opening / closing contacts is turned on, the operation lock member (45) moves from the non-interference position (P) to the interference position (P) with the rotation of all the maintenance operation members (43). The maintenance mechanism operating handle (91) is configured so as not to be attached to the opening / closing means (42) corresponding to another maintenance opening / closing contact that is moved to Q) and is not closed. The described multi-circuit switch. 7. A configuration for disabling attachment of the maintenance mechanism operation handle (91) to the opening / closing means (42),
The relative positional relationship between the operation lock member (45) and the maintenance mechanism operation shaft (42) constituting the opening / closing means is such that the maintenance mechanism operation handle (91) cannot be mounted.
2. The multi-circuit switch according to item 1. 8. A first and a second engagement surface (parallel to the axis of the maintenance mechanism operation shaft (42)) at the mounting position of the maintenance mechanism operation handle (91) on the maintenance mechanism operation shaft (42). 42a, 42b), and the maintenance mechanism operating handle (91) is provided with inserted guide means (94) along both engagement surfaces (42a, 42b). Multi-circuit switch as described in the paragraph. 9. The relative positional relationship between the operation lock member (45) for disabling attachment of the maintenance mechanism operation handle (91) to the insertion opening means (42) and the insertion opening means (42) is the same. The operation lock member (45) is located outside a region (T) surrounded by two planes (R, S) each including the first and second engagement surfaces (42a, 42b). 9. The multi-circuit switch according to claim 8, wherein: 10. The cover (76) is provided with operation suggesting means (80a, 80b) for indicating the insertion / removal direction of the maintenance mechanism operation handle (91).
A rotation display plate (72) which is provided over the rotation angle range of 1) and is rotatable with the rotation of the maintenance mechanism operation handle (91) is provided on the maintenance mechanism operation shaft (42). The rotating display plate (72) includes a maintenance mechanism operation handle (9).
An insertion guide means (74) for guiding the insertion of 1) is provided, and when the maintenance mechanism operation handle (91) is rotated, the rotation indication plate (72) is moved within the range of the operation suggestion means (80a, 80b). The multi-circuit switch according to any one of claims 5 to 8, wherein the insertion guide means (74) is simultaneously rotated so that the insertion guide means (74) is always positioned in the insertion / removal direction of the maintenance mechanism operation handle (91). . 11. The maintenance mechanism operation handle (91) includes:
11. Operation display means (95), wherein an insertion limit is regulated by said operation suggestion means (80a, 80b).
2. The multi-circuit switch according to item 1. 12. The operation display means (95) is projected upward through the insertion guide means (74), and the rotation display plate (72) is configured to be rotated together with the operation display means (95). The multi-circuit switch according to claim 10 or claim 11, wherein 13. The insertion guide means (74) is located at one end and the other end of the operation suggestion means (80a, 80b) when the maintenance switching contacts (34a to 34e) are turned on and off. The multi-circuit switch according to any one of claims 10 to 12. 14. The operation suggesting means (80a, 80b).
Are formed in two stages, and during the rotation operation of the maintenance mechanism operation handle (91), the maintenance mechanism operation handle (91) is
The multi-circuit switch according to any one of claims 10 to 13, wherein an operation in a radial direction of the rotation display plate (72) is added. 15. In the open state of the maintenance switching contacts (34a-34b), a color indicating the open state is exposed from the operation suggesting means (80a, 80b).
The multi-circuit opening / closing circuit according to any one of claims 10 to 14, wherein the rotation indicating plate (72) is configured such that a color indicating the input state is exposed from the operation suggesting means (80a, 80b). vessel. 16. An opening / closing display means (78) for displaying the opening or closing of the maintenance switching contacts (34a-34b) is provided at a part of the cover (76), and the rotation display plate (72) is provided. ) Includes status display means (75a, 75) for indicating the opening or closing of the maintenance switching contacts (34a to 34b).
The multi-circuit switch according to any one of claims 10 to 15, wherein b) is provided so as to be able to be displayed via the open-close display means (78). 17. A concealing panel (84) that covers the entire operation display unit (76, 72) including the cover (76) and the rotation display plate (72) is openably and closably provided. Item 17. The multi-circuit switch according to any one of Items 16. 18. The multi-circuit switch according to claim 17, wherein the concealing panel (84) is mounted on the main body (13) below the operation display (72, 76). 19. The concealment panel (84) has a closing prevention means (8) which can enter the insertion guide means (74) of the rotating display plate (72) held at the open display position (M).
19. The multi-circuit switch according to claim 17, further comprising 6a).