JPH09200914A - Lifter device for breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operability and safety by providing a lifter rail and a lock member and a retaining member for the breaker stopper on a drawing- frame rail. SOLUTION: In the case of lowering a breaker onto a floor, the height of a lifter rail 11 is adjusted so that the face of the lifer rail 11 and the face of a drawing-frame rail 7 may be on a level, the tips of the drawing-frame rail 7 and the litter rail 11 are butted with each other. At this time, through holes 7a and 12a agree with each other, and a coupling pin 13 is attached so that the mounting device boy may not be separated from the drawing frame. Next, a breaker stopper 8 is rotated clockwise about 90 deg., holding an operation pin 19. Then, the breaker stopper 8 is slid to the left. The other end 8c of the breaker stopper 8 is locked by the retaining edge 12b made at the coupling board 12, and the breaker stopper 8 keeps its slid condition without rotating. In this condition, the breaker is shifted to the left, and the coupling pin 13 is removed, and the device body is shifted to the left to lower the litter rail 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a lifter device for a circuit breaker which is housed in a drawer frame and is moved on a rail provided on the drawer frame to be housed and removed.

[0002]

2. Description of the Related Art Large breakers have a structure that allows them to be stored and removed by moving them on a rail provided on a drawer frame attached to a switchboard so that they can be removed as easily as possible for maintenance and inspection. There are many things I did. A lifter device has been conventionally used so that a large circuit breaker can be safely and easily lowered onto the floor when it is mounted at a relatively high position in a switchboard. FIG. 11 is a side view showing a conventional circuit breaker and lifter device housed in a switchboard. A drawer frame 2 is installed on the switchboard 1, and a circuit breaker 3 is housed in the drawer frame 2. The circuit breaker 3 includes wheels 4 and can move on a rail inside the drawer frame 2 and a drawer frame rail 50 that extends to protrude from the front surface of the switchboard 1. Note that FIG. 11 shows a state in which the circuit breaker 3 is pulled out to the front surface of the switchboard 1. A circuit breaker stopper 50a is formed at the tip of the drawer frame rail 50 so that the circuit breaker 3 does not accidentally fall from the rail.

On the other hand, the lifter device extends in a direction perpendicular to the floor surface, has a bottom portion with wheels mounted thereon and is movable on the floor surface, a dust removing bucket 51, and a bucket 51 for lifting the lifter frame 5. And an elevating and lowering operation device 6 for vertically elevating and lowering. Then, in order to lower the circuit breaker 3 to the floor surface for maintenance or the like, first, the lifter device is moved so that the bucket 51 is located below the circuit breaker 3, and then the bucket 51 is raised to lift the circuit breaker. The bottom of the circuit breaker 3 is lifted until the wheels 4 of 3 lift up from the draw-out frame rail 50 and reach a position higher than the breaker stopper 50a, or the draw-out frame rail 50 is removed or the lifter device is moved leftward in FIG. The bucket 51 is lowered to the floor surface.

[0004]

In the conventional lifter device having the bucket type structure as described above, the receiving portion of the bucket 51 is sandwiched between the circuit breaker 3 and the floor surface when the bucket 51 is lowered onto the floor surface. In addition, it was necessary to lift the circuit breaker 3 even slightly in order to lower it. In order to solve this problem, a structure has been proposed in which the hook 52 that is moved up and down by the lifting operation device 6 is hung from the upper part of the lifter device. In this suspension type, a hook 52 is hooked on a lifting plate 3a provided in the circuit breaker 3 to lift the circuit breaker 3 once and then descend as in the case of the bucket type. Thereby, unlike the case of the bucket type, the circuit breaker 3 can be directly dropped on the floor surface. However, in this suspension type structure, since the components for suspending the circuit breaker 3 need to be mounted at a position higher than the circuit breaker 3, the height of the lifter device itself becomes high,
There is a problem that it is difficult to operate in a small electric room.

[0005] The present invention has been made to solve the above problems. An object of the present invention is to provide a circuit breaker lifter device that can be directly landed on the ground by simply lowering the circuit breaker, the height of the device itself can be lowered, the circuit breaker can be easily moved, and safety after the movement can be secured. To provide.

[0006]

A lifter device for circuit breaker according to the present invention comprises a lifter rail capable of forming a continuous rail by butting against a drawer frame rail, and a lifting operation device for lifting the lifter rail. The drawer frame rail does not interfere with the movement of the circuit breaker when a continuous rail is configured, and when both rails (drawer frame rail and lifter rail) are separated, the circuit breaker on the drawer frame rail falls off. A circuit breaker stopper that automatically rotates or displaces so as to prevent such a situation, and a locking member that blocks a predetermined rotation or displacement of the circuit breaker stopper,
The lifter rail is provided with a holding member that holds the circuit breaker stopper so as not to block the movement of the circuit breaker.
With this configuration, when removing the circuit breaker, simply move the circuit breaker from above the draw-out frame rail to above the lifter rail, and then lower the lifter rail with the lifting operation device. It is possible to unload the circuit breaker directly, and when storing the circuit breaker, simply move the circuit breaker from above the lifter rail onto the draw-out frame rail and move the lifter device to separate the lifter rail from the draw-out frame rail. In addition, the stopper function of the circuit breaker stopper is exerted to enhance safety.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A lifter device for a circuit breaker according to the present invention comprises a movable device body, and a lifter rail capable of forming a continuous rail by abutting against a drawer frame rail. Then, a circuit breaker stopper is rotatably or displaceably held near the end of the draw-out frame rail. This circuit breaker stopper has an end portion (contact end) projecting upward from the draw-out frame rail so that it can come into contact with the circuit breaker in the free state. In addition, the draw-out frame rail is provided with a locking member that prevents rotation or displacement of the breaker stopper that is pressed against the breaker drawn along the rail.

On the other hand, the lifter rail is interrupted so as not to prevent the movement of the circuit breaker (for example, a state in which it does not project above the rail) while the drawer frame rail and the lifter rail form a continuous rail. A holding member for holding the container stopper is provided. In order to lower the circuit breaker to the floor surface using the lifter device as described above, first the device body and the draw-out frame are opposed to each other, and the draw-out frame rail and the lifter rail are butted against each other to form a continuous rail, and the breaker is cut off. The device stopper is manually rotated or displaced to be held by the holding member, the circuit breaker is moved from the drawer frame rail to the lifter rail, both rails are separated, and the lifter rail is lowered to near the floor surface. At this time, as shown in FIG. 1, the circuit breaker can be placed on the lifter rail with the bottom of the circuit breaker protruding below the lower surface of the lifter rail. Can be landed.

In order to return the circuit breaker to the drawer frame, the circuit breaker is placed on the lifter rail on the floor and lifted, the drawer frame rail and the lifter rail are butted against each other, and the breaker stopper is rotated or displaced to hold the holding member. Then, the circuit breaker is moved from above the lifter rail to above the draw-out frame rail, and the lifter rail is separated from the draw-out frame rail. As a result, the circuit breaker stopper is automatically released from the holding member and returns to the free state, and its contact end can contact the circuit breaker (for example, the contact end projects above the drawer frame rail). Become. As a result, even if the circuit breaker inadvertently moves in the drawing direction, the circuit breaker comes into contact with the circuit breaker stopper whose rotation or displacement is restricted by the locking member to prevent the circuit breaker from moving. It is safe without falling off.

The circuit breaker stopper may be formed with a long hole, and the long hole may hold the breaker stopper on a shaft provided on the drawer frame rail. In this case, rotate the circuit breaker stopper in the direction opposite to the side on which the locking member is provided, and slide the circuit breaker stopper to the lifter rail side along the long edge of the long hole to move it to the lifter rail. Since the circuit breaker stopper may be held by the attached holding member, the structure is simple. Further, the hole provided in the blocking stopper may be a hole having a diameter corresponding to the outer diameter of the shaft. In this case, it is preferable that the holding member is rotatably supported or slidable along the lifter rail.

In the case of a rotatable holding member,
By manually rotating the circuit breaker stopper from the free state, the circuit breaker stopper engages with the holding member, and the holding member is provided so as to rotate in a direction opposite to the rotation direction of the circuit breaker stopper. . Then, when the circuit breaker stopper is further rotated, the engagement between the two is released, and the holding member self-returns to its original position (initial state). Next, when the breaker stopper is released, the breaker stopper tries to return to the free state,
On the way, it is locked by the holding member that has already returned to the original state. In this state, the contact end is in a position where it does not contact the circuit breaker. That is, the circuit breaker stopper is held by the holding member and the draw-out frame rail in a state where it does not project above the draw-out frame rail.

In the case of the slidable holding member, the holding member is urged in the direction toward the draw-out frame, and the circuit breaker stopper is manually rotated from the free state so that the circuit breaker stopper acts as the holding member. Engagement, whereby the holding member is provided so as to slide in a direction away from the drawer frame. Then, by further rotating the circuit breaker stopper, both engagements are released, and the holding member slides in the direction toward the drawing frame and self-returns to its original position. next,
When the circuit breaker stopper is released, the circuit breaker stopper tries to return to the free state, but is locked by the holding member that has already returned to the original position on the way. In this state, the contact end of the circuit breaker stopper is in a position where it does not contact the circuit breaker.

When the circuit breaker is returned from the lifter device main body to the draw-out frame, regardless of whether the above-mentioned holding member is of a rotatable type or a slidable type, the holding member is preliminarily operated beforehand to break the circuit breaker stopper. Does not have to be held in a position where it does not abut the circuit breaker. The reason is as follows. When the holding member is not manually operated in advance, the breaker stopper is in a free state, so when moving the breaker onto the draw-out frame rail, the breaker and the contact end of the breaker stopper come into contact with each other. . Then, by applying a pressing force to move the breaker onto the draw-out frame rail, the breaker stopper rotates in the direction opposite to the side on which the locking member is provided and engages with the holding member. Then, the breaker stopper performs the same operation as in the case where it is manually rotated as described above, and is held by the holding member. That is, the circuit breaker stopper is rotated by the pressing force when the circuit breaker is moved, whereby the holding member automatically rotates or slides and holds the circuit breaker stopper.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a circuit breaker lifter device according to the present invention will be described below with reference to FIGS. (First Embodiment) A lifter device according to a first embodiment of the present invention is shown in FIGS. FIG. 1 is a side view showing a state in which both are connected by a lifter rail and a draw-out frame rail in order to move the circuit breaker from the draw-out frame to the lifter device main body or to return from the lifter device main body to the draw-out frame. FIG. 2A is a plan view of a main part of the lifter rail, and FIG. 2B is a plan view of a main part of the drawer frame rail. 3A is a side view of the lifter rail shown in FIG. 2A, and FIG. 3B is a side view of the drawer frame rail shown in FIG. 2B. 4 (a) and 4 (b) are side views of essential parts of the lifter rail and the drawer frame rail after connection. In this embodiment and second and third embodiments to be described later, the same or corresponding components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

First, referring to FIG. 1, a lifter device according to the present embodiment includes a lifter frame 5 and a lifter rail 11.
And a lifting operation device 6. The lifter rail 11 is provided with a connecting plate 12 for connecting the lifter rail 11 and the drawer frame rail 7 in a butted state. A circuit breaker stopper 8 is provided at the tip of the drawer frame rail 7. This breaker stopper 8 has
As shown in FIG. 3 (b), a long hole 8a is formed at an intermediate portion in the longitudinal direction, and the breaker stopper 8 is held by the shaft 9 fixed to the drawer frame rail 7 in the long hole 8a. Therefore, the breaker stopper 8 is rotatable around the shaft 9 and is also slidable along the relatively long edge (long edge) of the elongated hole 8a. As shown in FIGS. 2 (b) and 3 (b), an operation pin 19 is fixed to the other end 8c of the breaker stopper 8 so as to be manually operated. Also, in the breaker stopper 8,
The center of gravity is located closer to the other end 8c than the position of the elongated hole 8a so that one end (abutting end) 8b is on the upper side in a free state (a state where no external force is applied).

Further, as shown in FIG. 3B, the draw-out frame rail 7 has a direction opposite to the direction in which the clock hands rotate from the free state position of the breaker stopper 8 (hereinafter, simply "counterclockwise direction"). The lock member 10 is provided to prevent the rotation of the lock member 10. Further, the operation pin 19 is manually operated to rotate the circuit breaker stopper 8 in the direction in which the hands of the clock rotate (hereinafter, simply referred to as "clockwise direction"), as indicated by the one-dot chain line in FIG. 3B. The position of the locking member 10 is determined so that the breaker stopper 8 returns to the original free state position even if the hand is released in the state of being in contact with the locking member 10. Therefore, in the breaker stopper 8, the contact end 8b is located on the upper side unless special locking means or external force acts. That is, in the free state of the breaker stopper 8,
The contact end 8b is arranged above the drawer frame rail 7 and can contact the circuit breaker 3. In the present embodiment, the contact end 8b is arranged on the upper side in a free state due to the position of the center of gravity of the circuit breaker stopper 8 and the position of the elongated hole 8a. A spring that biases the spring may be used.

The contact end 8b of the circuit breaker stopper 8 projects onto the rail surface of the drawer frame rail 7 on which the wheels 4 of the circuit breaker 3 move when the circuit breaker stopper 8 is free. Even if the wheel 4 abuts against the abutting end 8b and presses it by moving in the left direction (direction toward the lifter rail 11 side) in, the circuit breaker stopper 8 cannot rotate due to the existence of the locking member 10. . Therefore, the circuit breaker 3 does not fall off the drawer frame rail 7 and is safe. On the other hand, as shown in FIG. 3A, a connecting plate 12 is attached to the lifter rail 11 so as to project from the tip thereof, and a through hole 12a is provided at the tip of the connecting plate 12. As shown in FIG. 1, the lifter rail 11 is attached to the lifter frame 5 of the lifter device main body, and is lifted and lowered by the lifting operation device 6.

Next, the operation of lowering the circuit breaker 3 to the floor surface using the lifter device of this embodiment having the above structure will be described. First, lifter rail 11
The height of the lifter rail 11 is adjusted so that the rail surface of the drawing frame rail 7 and the rail surface of the drawing frame rail 7 are substantially flush with each other, and then the lifter device main body is moved to the right in FIG. Butt the ends of the rails 11.
As a result, both rails form one continuous rail. At this time, the through hole 7a shown in FIG. 3 (b) and the through hole 12 shown in FIG. 3 (a).
The connecting pin 13 shown in FIG. 2 (a) is attached so that it is aligned with a and is inserted through these through holes 7a and 12a, so that the lifter device main body is not accidentally separated from the drawer frame. .

Next, as shown in FIG. 4 (a), the operation pin 19 is held by hand and the breaker stopper 8 is rotated about 90 ° clockwise. Then, the circuit breaker stopper 8 is slid to the left in FIG. 4A, and then the hand is released. As a result, as shown in FIG. 4B, the other end 8c of the breaker stopper 8 is locked to the holding edge 12b formed on the connecting plate 12, and the breaker stopper 8 slides without rotating. Stay moved. In this state, the contact end 8b of the circuit breaker stopper 8 does not project above the rail surface. In this state, the breaker 3 is shown in FIG.
It moves to the left in FIG. 4B, the connecting pin 13 is removed, and the lifter device main body is moved to the left in FIG. 4B. Then, the lifter rail 11 is lowered. At this time, as shown in FIG. 1, since the bottom portion of the circuit breaker 3 projects below the lower surface of the lifter rail 11,
By lowering the lifter rail 11 to near the floor surface, the bottom of the circuit breaker 3 can be directly landed on the floor.

When the circuit breaker 3 is returned to the draw-out frame 2, the above-mentioned operation may be carried out in the reverse order. When the lifter device main body is moved leftward in FIG. 1 after completion of the return, the other end 8c of the circuit breaker stopper 8 is obtained. And the holding edge 12b of the connecting plate 12 are disengaged, and the circuit breaker stopper 8 rotates counterclockwise by its own weight from the state shown in FIG.
b projects on the rail surface of the drawer frame rail 7. That is,
The circuit breaker stopper 8 shifts to the free state shown in FIG. As a result, even if the circuit breaker 3 carelessly moves to the left in FIG. 1, the circuit breaker 3 does not fall off and safety is ensured.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 5 to 7 are side views of the essential parts of the lifter device according to the second embodiment. 5 (b), 6 (b), and 7 (b) are side views as seen from the direction of arrow 30 in FIGS. 5 (a), 6 (a), and 7 (a), respectively. ing. In the first embodiment described above, the circuit breaker stopper 8 is held on the shaft 9 by the elongated hole 8a.
As shown in (b), in this embodiment, the breaker stopper 14 is held on the shaft 9 by a round hole. Further, the holding member 15 corresponding to the holding edge 12b in the first embodiment is biased by the spring 20 to rotate in the clockwise direction and is locked by the pin 16. Further, the lifter rail 11 and the drawer frame rail 7 are connected to each other by the connecting plate 22 and the connecting pin 13.
And are connected by

Next, the operation of lowering the circuit breaker 3 to the floor using the lifter device according to this embodiment will be described. First, up to the connecting pin 13 is attached by the same method as in the first embodiment. Then, by holding the operation pin 19 by hand, the breaker stopper 14 is rotated clockwise.
As a result, as shown in FIGS. 6A and 6B, the operation pin 19 engages with the side 15a of the holding member 15 to rotate the holding member 15 counterclockwise. Then, by further rotating the circuit breaker stopper 14, the engagement between the operation pin 19 and the holding member 15 is once released, and the holding member 15 is biased by the spring 20 to rotate in the clockwise direction to engage with the pin 16. It returns automatically until stopped. At this time, if the holding member 15 has a structure that returns until it is locked to the pin 16 by its own weight, it is not necessary to urge it by 20.

When the holding member 15 is locked by the pin 16 and the hand is released from the operation pin 19, as shown in FIG.
As shown in (a) and (b), the circuit breaker stopper 14
Is rotated counterclockwise by its own weight and held by the holding edge 15b of the holding member 15. Thereby, the circuit breaker stopper 1
When the abutting end 14a of No. 4 does not project on the rail surface, the circuit breaker stopper 14 pulls out the drawing frame rail 7 and the holding member 15.
The circuit breaker 3 can be moved to the lifter device side. After the circuit breaker 3 moves to the lifter device side in this way, the circuit breaker 3 is landed in the same manner as in the case of the first embodiment.

Next, the operation of returning the circuit breaker 3 to the drawing frame 2 will be described. First. After the rails 7 and 11 are butted against each other and the connecting pin 13 is attached, the circuit breaker 3 is pushed rightward in FIG. Thereby, the wheel 4 of the circuit breaker 3 contacts the contact end 14a of the circuit breaker stopper 14, and the circuit breaker stopper 14 can be rotated clockwise to step the contact end 14a below the rail surface. Therefore, the circuit breaker 3 can be moved onto the drawer frame rail 7 without any trouble. While the circuit breaker 3 is moving, the circuit breaker stopper 14 rotates clockwise as in the case where the circuit breaker stopper 14 is manually rotated. As a result, the operating pin 19 engages with the holding member 15 to rotate the holding member 15 in the direction opposite to the clockwise direction, and similar to the operation of lowering the circuit breaker 3 to the floor surface, the circuit breaker is operated. The other end 14b of the stopper 14 can be locked by the holding edge 15b of the holding member 15.

Then, after the circuit breaker 3 has completely moved onto the draw-out frame rail 7, the connecting pin 13 is removed and the lifter device main body is moved leftward in FIG. Thereby,
The engagement between the operation pin 19 and the holding edge 15b is released, and the breaker stopper 14 automatically shifts to the initial state (free state) to prevent the breaker 3 from falling off. While the circuit breaker 3 is moving, the operation pin 19 may not rotate until it is held by the holding member 15. In this case, the circuit breaker stopper 14 is in the initial state without moving the lifter device body. It is clear to return to. Thus, in this embodiment,
The operation when returning the circuit breaker 3 to the draw-out frame 2 is simple and safety is ensured.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. 8 to 10 are side views of the essential parts of the lifter device according to the third embodiment of the present invention. 8 (b), 9 (b) and 10 (b) are shown in FIGS. 8 (a) and 9 (a), respectively.
FIG. 11 is a side view seen from the direction of arrow 30 in FIG. With reference to FIGS. 8A and 8B, in the lifter device according to the present embodiment, the holding member 1 of the second embodiment described above is used.
Instead of 5, a holding member 18 is provided. The holding member 18 is slidable along the lifter rail 11, is biased by a spring 21 in the right direction (direction toward the drawer frame 2) in FIG. 8A, and has a long hole 18 c for receiving the pin 17. Have The holding member 18 has an inclined surface 18a at its tip, and when the operation pin 19 is held by hand and the breaker stopper 14 is rotated clockwise, the operation pin 19 engages with the inclined surface 18a and slides. . As a result, the holding member 18 slides in the left direction (the direction away from the drawer frame 2) as shown in FIG. 9A.

Then, by further rotating the breaking stopper 14 in the clockwise direction, the engagement between the holding member 18 and the breaker stopper 14 is once released, whereby the holding member 1 is released.
8 is biased by the spring 21 and returns to the right in FIG. 9A. After that, by releasing the operation pin 19 from the hand, the other end 14b of the circuit breaker stopper 14 is held by the holding edge 18b of the holding member 18, as shown in FIG.
The holding member 15 has the same function as the holding member 15 of the second embodiment. It should be understood that the embodiments disclosed this time are exemplifications in all respects and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0028]

The present invention is carried out in the form as described above, and the height of the lifter device can be reduced by providing the rail on the main body. Further, since the breaker can be landed on the floor by simply lowering the lifter rail, there is no problem in the case of the conventional bucket type. Furthermore, when the lifter device main body is separated from the draw-out frame, the circuit breaker stopper automatically returns to the initial state (the state in which it abuts the circuit breaker 3). It is possible to prevent the rail from falling out of the drawer frame rail, and it is possible to improve safety.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a circuit breaker is removed from a drawer frame by a lifter device according to a first embodiment of the present invention.

FIG. 2A is a plan view of a main part of a lifter rail. (B) is a plan view of the main part of the drawer frame rail.

3 (a) is a side view of the lifter rail shown in FIG. 2 (a). 2B is a side view of the drawer frame rail shown in FIG. 2B.

4 (a) and 4 (b) are side views of essential parts showing a state in which the lifter rail and the drawer frame rail shown in FIG. 3 are connected.

FIG. 5 (a) is a side view showing a connecting portion between a lifter rail and a drawer frame rail in the second embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 6A is a side view showing a connecting portion between the lifter rail and the drawer frame rail in the second embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 7A is a side view showing a connecting portion between the lifter rail and the drawer frame rail in the second embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 8A is a side view showing a connecting portion between the lifter rail and the drawer frame rail in the third embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 9A is a side view showing a connecting portion between the lifter rail and the drawer frame rail in the third embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 10 (a) is a side view showing a connecting portion between the lifter rail and the drawer frame rail in the third embodiment of the present invention. (B) is a side view seen from the direction according to the arrow 30 in (a).

FIG. 11 is a side view showing a conventional lifter device.

[Explanation of symbols]

 2 Drawer frame 3 Circuit breaker 4 Wheel 5 Lifter frame 6 Elevating / lowering device 7 Drawer frame rail 8, 14 Circuit breaker stopper 8a Long hole 8b, 14a Abutting end 9 Shaft 10 Locking member 11 Lifter rail 12 Connecting plate 12a, 15b, 18b Holding edge 15,18 Holding member 19 Operation pin 20,21 Spring

Claims (4)

[Claims] 1. A lifter device for use in a circuit breaker housed in a drawer frame and movable on a drawer frame rail provided on the drawer frame, comprising: an end portion of the drawer frame rail and an end portion thereof. A lifter rail that forms a continuous rail by abutting and a lifting operation device for lifting the lifter rail are provided, and the drawer frame rail is rotatably or displaceably held near its end. In the free state, the circuit breaker stopper having a contact end capable of contacting the circuit breaker moving on the drawer frame rail and the circuit breaker moving in the direction of being drawn out from the drawer frame are the contact ends. And a lock member that prevents the circuit breaker stopper from rotating or displacing when pressed against the breaker stopper, and the lifter rail is the breaker in a state in which the continuous rail is configured. Having a holding member for holding the breaker stopper so as not to prevent movement of circuit breaker lifter device. 2. An elongated hole is formed in the circuit breaker stopper, and the circuit breaker stopper is held by a shaft at one longitudinal end of the elongated hole in a free state, and the circuit breaker stopper is removed from the free state. The lifter device for circuit breaker according to claim 1, wherein the circuit breaker stopper is held by the holding member by being slid along the long edge of the elongated hole after being rotated. 3. The holding member is rotatable, and engages with the circuit breaker stopper when the circuit breaker stopper rotates from the free state to the first direction when the circuit breaker stopper rotates in the first direction. The circuit breaker stopper is provided at a position that rotates in the opposite second direction, and the circuit breaker stopper is further rotated in the first direction to release the engagement between the circuit breaker stopper and the holding member. Means for returning the holding member to the initial state before rotation is provided on the holding member, and the circuit breaker stopper is held by the holding member that has returned to the initial state, enabling movement of the circuit breaker. ,
The lifter device for a circuit breaker according to claim 1. 4. The holding member is attached so as to be slidable along the lifter rail, and an elastic member for urging the holding member in the direction toward the drawer frame is attached to the holding member. By rotating the circuit breaker stopper from the free state, the holding member engages with the circuit breaker stopper and slides in a direction away from the draw-out frame, and further rotates the circuit breaker stopper to rotate the circuit breaker stopper. When the engagement between the circuit breaker stopper and the holding member is released, the holding member is biased by the elastic member and slides toward the draw-out frame to return to the initial state, and then return to the initial state. The lifter device for circuit breaker according to claim 1, wherein the breaking stopper is held by the holding member, and the breaker can be moved.