JPH10327512A - Shutter opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter opening and closing device of a closed-type switchboard, which has a simpler structure and can alleviate the drive force for opening and closing the shutter. SOLUTION: This device is composed of the following parts. One end of a shutter arm 41p is axially supported, so that the arm is freely swingable. A shutter 4 is provided at the other end of the arm 41p. A breaker 2 is provided so that it is freely movable in the contacting and separating directions with the shutter 4. A roller 23p is axially supported with the breaker 2, so that the roller 23p freely rotates around the axis, in parallel with the axially supporting shaft of the shutter arm 41p and on the surrounding surface of which a guide groove is provided. One end of a kick-up beam 42p is axially supported at the intermediate part of the shutter arm 41p, so that the beam is freely rotatable around the axis in parallel with the supporting shaft of the shutter arm 41p and brought into contact with the guide groove at the intermediate part. The beam 42p is provided, so that it is fluctuated by the movement of the breaker 2 and opens and closes the shutter 4, interlocking with the shutter arm 41p.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a shutter opening / closing device for shielding a bus of a closed switchboard from a circuit breaker.

[0002]

2. Description of the Related Art A closed switchboard (hereinafter simply referred to as a switchboard) has a box-shaped switchboard housing provided with a front door and a rear surface adjacent to a busbar room, and a front-rear direction inside thereof. A drawer-shaped circuit breaker is provided movably, and by moving the circuit breaker, an input / output terminal of a primary conductor provided on the rear side of the circuit breaker is introduced into the switchboard from the rear side. And disconnection and connection with the respective terminals of the bus and branch lines.

Since such a switchboard handles a large current, the bus and the primary conductor are shielded by an openable and closable shutter, so that inspection and maintenance inside the switchboard can be performed safely. I have.

The shutter is opened when the circuit breaker moves backward, and closed when the circuit breaker moves forward. Various types of opening and closing structures have been studied. ing. For example, Japanese Utility Model Application 63-66
Japanese Patent Application Publication No. 008 discloses a shutter opening / closing device having the following opening / closing structure.

FIG. 12 is a perspective view from the upper right side of the front showing a closed switchboard. In the figure, reference numeral 1 denotes a box-shaped switchboard housing whose rear wall is shared with the outer wall of the busbar room 3. The switchboard housing 1 is partitioned into three upper and lower chambers to form three box-shaped circuit breaker chambers 11, 11, 11, and a box-shaped circuit breaker 2 is housed in each circuit breaker chamber 11.

[0006] Each circuit breaker room 11 is opened at the front of the switchboard housing 1, and a switchboard door 12 pivotally supported at the left end is provided at each opening. And the switchboard door 12
A display panel 13 for displaying the magnitude of the passing current in the circuit breaker 2 is provided on the front surface of the circuit breaker 2, and is connected to the circuit breaker 2 via a terminal block 14 provided on the inner wall of the circuit breaker room 11.

FIG. 13 is a perspective view from the upper left of the front showing the structure of the circuit breaker 2. The circuit breaker 2 is provided with four wheels 21, 21,...
The handle 22 provided on the front surface of the circuit breaker 2 is grasped and pushed and pulled in the circuit breaker chamber 11 in the front-rear direction. Also, from the rear surface of the circuit breaker 2, a total of six primary conductors 24, 24,... In the form of narrow plates in the upper and lower rows project rearward, and the protruding ends thereof each have a clip shape. Further, a roller 2 provided above the upper surface of the circuit breaker 2 is provided on the left surface of the circuit breaker 2.
3 is rotatably supported with the left-right direction as a rotation axis.

FIG. 14 is an exploded perspective view showing a mounted state of the roller 23. First, the rectangular roller holding plate 231 is
A half portion in the longitudinal direction is located above the upper surface of the circuit breaker 2, and the other half is fixed to the left surface of the circuit breaker 2 with two mounting bolts. A roller mounting shaft 232 is vertically welded to the left surface of the protruding portion of the roller holding plate 231, and a retaining ring groove is provided around the distal end thereof. Then, the roller mounting shaft 232 is inserted into the roller 23, and the retaining ring 2 is inserted into the retaining ring groove of the roller mounting shaft 232 projecting to the left side of the roller 23.
33 are attached. Thereby, the roller 23
Its movement in the axial direction is restricted, and it is rotatably supported on the left and right directions as an axis.

FIG. 15 and FIG. 16 are side sectional views showing the inside of the circuit breaker room 11, FIG. 15 shows a cut-off state of the bus 3a and the branch 3b, and FIG. 16 shows a state of conduction of the bus 3a and the branch 3b, respectively. Is shown. At the position of the rear wall of the breaker room 11 corresponding to each primary conductor 24, a prismatic porcelain tube 31 is provided through the rear wall with the opening directed in the front-rear direction. On the way, busbar room 3 and circuit breaker room 1
A partition 32 that separates the two is provided. In addition, each partition 3
2, a narrow plate-shaped conductor portion 33 is provided,
The upper row of conductors 33 protruding toward the bus chamber 3 is connected to the bus 3a, and the lower row of conductors 33 is connected to the branch line 3b.

Buses 3a, 3 opening in circuit breaker room 11
The insulator tubes 31, 31, 31 on the sides a, 3a are provided with a rectangular plate-shaped shutter 4 made of an insulating material so as to cover all of these openings, whereby each conductor 33 on the bus 3a side is provided. Are shielded from each primary conductor 24 in the upper row.

FIG. 17 is a perspective view showing a main part of the shutter opening / closing device, and FIG. 18 is an exploded perspective view thereof. A pair of arm support portions 43, 4 made of short angle members are provided on the rear wall of the circuit breaker room 11 at positions higher than the upper surfaces of the insulator tubes 31, 31, 31, on the left and right sides of the insulator tubes 31, 31, 31, respectively.
3 is fixed to the rear wall by two mounting bolts on one side thereof, and is disposed to face the rear wall perpendicularly to the rear wall and the thickness direction of the other side to the left and right, An arm pivot shaft 431 is provided vertically on the other side of the separated surface, and a pin hole is drilled at the tip of each arm pivot shaft 431 perpendicular to the axis.

A pair of shutter arms 41, 41, which are made of a narrow plate member and whose thickness direction is directed to the left and right, is provided with an arm pivot shaft 4 in a thickness direction mounting hole formed at one end thereof.
31 and 431 are inserted from opposite sides, and are pivotally supported so as to be rotatable about the left-right direction. A washer is inserted into the tip of an arm pivot shaft 431 protruding outside each shutter arm 41, and a split pin is inserted into each of the above-described pin holes. 431 is prevented from falling off.

The other end of each shutter arm 41 is a plate-like shutter holding portion 411, 4 for holding the shutter 4 from behind.
11 are provided respectively, and are provided at positions slightly lower than the arm pivot shafts 431 and 431 when the shutter 4 is closed. The shutter 4 is held by each of the shutter holding portions 411 at both left and right end portions of the rear surface, and is fixed to each of the shutter holding portions 411 from the front surface of the shutter 4 by two mounting bolts. For this reason, the shutter 4
Is urged in the closing direction by its own weight and the weight of the shutter arm 41. In addition, a beam pivot shaft 412 is provided vertically at substantially the center of the left side of the left shutter arm 41 in the longitudinal direction, and a pin hole is drilled at the end thereof at right angles to the axis.

A kick-up beam 42 made of a narrow plate member slightly shorter than the depth of the narrow circuit breaker chamber 11 is provided with the thickness direction directed to the left and right. A perforated beam pivot shaft mounting hole 422 is provided. The beam pivot shaft mounting hole 422 has a long hole shape long in the longitudinal direction of the kick-up beam 42, and the beam pivot shaft 412 is inserted into the beam pivot shaft mounting hole 422 from the inside, and the right and left direction is changed. A kick-up beam 42 is pivotally supported as an axis. A washer is inserted into the tip of the beam pivot 412 protruding outside the kick-up beam 42, and a split pin is inserted into the pin hole. Is prevented from falling off.

At a substantially central portion of the kick-up beam 42 in the longitudinal direction, a narrow-width kick-up plate 421 has its longitudinal direction coincident with the longitudinal direction of the kick-up beam 42 and is perpendicular to the right from the lower end of the kick-up beam 42. Welded to. Kick plate 42
1 has a length substantially equal to the moving distance of the circuit breaker 2, is provided at a position slightly lower than the vertex of the roller 23 provided with the circuit breaker 2, and It has a width dimension that can be abutted from above. Further, the front portion of the kick-up plate 421 is warped upward over an appropriate length, so that the roller 23 can smoothly go under the kick-up plate 421 from the near side.

The frame 15 provided on the front side of the circuit breaker room 11 is a columnar member having a U-shape in a cross-sectional view, and is provided with an opening in the cross-sectional view to the right. At a position slightly higher than the arm pivot shaft 431 of the frame 15, a short columnar beam holding plate 4 having an L-shaped cross section is formed so as to cover the right side from the front side of the frame 15.
4 are provided, and are fixed to the frame 15 by two mounting bolts from the front. Further, mounting holes are formed in the right side of the beam holding plate 44 in the left-right direction.

At the right side of the mounting hole, the mounting hole provided at the other end of the kick-up beam 42 is made to coincide with the mounting hole provided at the other end of the kick-up beam 42 via a ring-shaped spacer 445 having a small coefficient of friction at the end face portion. The inserted mounting bolt is inserted therethrough and is fixed on the left side of the beam holding plate 44 with a washer and a nut, and pivotally supports the kick-up beam 42 about the left and right direction.

With the above configuration, the gripper 22 is gripped and the circuit breaker 2 is pushed backward, whereby the rollers 23
Pushes up the kick-up plate 421 in such a manner that it goes under the kick-up plate 421, and the kick-up beam 42 that rotates upward with the push-up plate 421 causes the shutter arm 41 to rotate upward and the shutter 4 to be opened. You. At the same time, the primary conductors 24, 24,.
a, 3a and the branch lines 3b, 3b, 3b to be in a conducting state.

By pulling out the circuit breaker 2 in the opposite direction to the above operation, the roller 23 is moved up by the kick-up plate 421.
The shutter arm 41 pivots downward by the kick-up beam 42 pivoting downward with the kick-up beam 42 and the shutter 4 is closed. At the same time, the primary conductor 24,
24,... Are the buses 3a, 3a, 3a and the branch lines 3b, 3
b, 3b and cut off.

[0020]

As described above, in a conventional switchgear opening / closing device for a switchboard, a terminal block 1 is provided.
4 and the circuit breaker 2 are connected to the circuit breaker 2 from the terminal block 14 through the right side of the frame 15 and from the left side of the kick-up beam 42 to the lower side, so as not to hinder the movement of the circuit breaker 2. However, since the plate-shaped kick-up beam 42 has a configuration in which the width direction is up and down, the wiring slides on the side surface of the kick-up beam 42, and the operation of the kick-up beam 42 is reduced. There was a risk of inhibition.

The kick-up beam 42 has a plate shape,
In addition, since the kick-up plate 421 is provided, it is heavy, requires a large driving force to push and pull the circuit breaker 2 to open and close the shutter 4, and has a relatively complicated shape. For this reason, it is difficult to insulate the entire surface of the kick-up beam 42, and the power distribution panel 1 generated due to electric leakage or the like.
There is a problem that the magnetic field lines inside are easily deformed.

Further, a kick-up plate 421 having a narrow plate shape is provided.
Contact the roller 23, so that the circuit breaker 2
The roller 23 is displaced from the left and right by the
There was a risk of dropping out of 1.

Further, as the circuit breaker 2 advances, each of the primary conductors 24 in the upper row is cut off from the conductor portion 33 on the busbar 3a side, and immediately after being pulled out from the opening of the insulator tube 31, the shutter 4 is turned off.
Is closed, and the shutter 4 is desirably opened immediately before the primary conductors 24 in the upper row come into contact with the shutter 4 with the retreat of the circuit breaker 2, and high accuracy is required for mounting each part.

Further, since the circuit breaker 2 shields the front of the shutter 4, the open / close state of the shutter 4 is checked by visually checking the front and rear positions of the circuit breaker 2. Even when the shutter 4 is locked in the open state due to a malfunction of the arm 41 or the kick-up beam 42, the circuit breaker 2 can be pulled out to the forward position, which may be different from the actual state of the shutter 4.

The present invention has been made in view of such circumstances, and has a simpler structure than a conventionally used shutter opening / closing device for a switchboard, thereby reducing the driving force for opening / closing the shutter 4. By observing the operation of the kick-up beam 42, the open / closed state of the shutter 4 can be reliably confirmed, and the kick-up beam 42 having a simple shape can be easily insulated. It is an object of the present invention to provide a shutter opening / closing device for a closed switchboard, which can prevent the operation of the kick-up beam 42 from being hindered by wiring, and is less affected by lines of magnetic force generated in the switchboard 1.

[0026]

According to a first aspect of the present invention, there is provided a shutter opening / closing device having an arm pivotally supported at one end, a shutter provided at the other end of the arm, and a contact / separation mechanism with the shutter. And a roller rotatably supported by the pulling means so as to be rotatable around an axis parallel to a pivot shaft of the arm, and having a guide groove formed on a peripheral surface thereof. One end of the arm is pivotally supported in the middle of the arm so as to be swingable around an axis parallel to the pivot axis of the arm, and is in contact with the guide groove in the middle of the arm, so that the pulling means can be moved. A beam that swings with the arm and opens and closes the shutter in conjunction with the arm.

A shutter opening / closing device according to a second aspect of the present invention comprises:
In the shutter opening and closing device according to the invention, the beam is provided so as to be allowed to move in the longitudinal direction.

A shutter opening / closing device according to a third aspect of the present invention is the shutter opening / closing device according to the first or second aspect, wherein the beam has a display indicating a relative position with respect to another fixed member.

A shutter opening / closing device according to a fourth aspect of the present invention comprises:
In the shutter opening / closing device according to the third to third aspects, the beam is covered with an insulator.

According to the shutter opening and closing device of the first invention, the kick-up plate provided on the beam is abolished, the guide groove is provided around the roller, and the beam directly contacts the roller. Therefore, the shape of the beam can be simplified, the driving force for opening and closing the shutter can be reduced, and the beam can be made rod-shaped, so that the influence of the magnetic lines generated in the switchboard is small. Furthermore, since the corners can be eliminated from the cross-sectional shape of the beam, the frictional resistance with the wiring in the switchboard is reduced, and the operation is less likely to be hindered by the wiring. In addition, since the pull-out unit moves the guide groove of the roller in contact with the peripheral surface of the beam and moves along the beam, the roller is dropped from the beam due to a shift in the left-right position of the pull-out unit. Nothing.

According to the shutter opening / closing device according to the second aspect of the present invention, since the beam is provided so as to be allowed to move in the longitudinal direction, the driving force for opening and closing the shutter can be further reduced. Further, since the beam is pivotally supported at one end in the middle of the arm, the beam is pushed and pulled in the longitudinal direction by the swinging position of the shutter. By observing the movement of the beam, the open / closed state of the shutter can be reliably known.

According to the shutter opening / closing device according to the third aspect of the present invention, since the beam is provided with the indication indicating the relative position to the other fixing member, the movement of the beam in the longitudinal direction can be made clear.

According to the shutter opening / closing device according to the fourth aspect of the present invention, since the kick-up plate provided on the beam is eliminated, the shape of the beam can be made as simple as a rod, and the insulator can be used. It is easy to cover with.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings showing the embodiments. Embodiment 1 FIG. FIG. 1 is a perspective view from the upper right side of the front showing a closed switchboard according to the present invention. In the figure, reference numeral 1 denotes a box-shaped switchboard housing.
Shared with the outer wall. 3 inside the switchboard housing 1
Three circuit breaker chambers 11 and 1 divided into chambers
1 and 11 and each circuit breaker room 11 has a box-shaped circuit breaker 2.
Is stored.

Each circuit breaker room 11 is opened at the front of the switchboard housing 1, and a switchboard door 12 pivotally supported at the left end is provided at each opening. And the switchboard door 12
A display panel 13 for displaying the magnitude of the passing current in the circuit breaker 2 is provided on the front surface of the circuit breaker 2, and is connected to the circuit breaker 2 via a terminal block 14 provided on the inner wall of the circuit breaker room 11.

FIG. 2 is a perspective view from the upper front left side showing the structure of the circuit breaker 2. The circuit breaker 2 is provided with four wheels 21, 21,... In the four corners at the bottom of the circuit breaker 2. The handle 22 provided on the front surface of the circuit breaker 2 is gripped and moved forward and backward in the circuit breaker room 11. Pushed and pulled in the direction. Also, from the rear surface of the circuit breaker 2, a total of six primary conductors 24, 24,... In the form of narrow plates in the upper and lower rows project rearward, and the protruding ends thereof each have a clip shape. Further, on the left side of the circuit breaker 2, a drum-shaped roller 23p provided above the upper surface of the circuit breaker 2 is rotatably supported with the left-right direction as a rotation axis.

FIG. 3 is an exploded perspective view showing a mounted state of the roller 23p. First, the rectangular roller holding plate 231 is
A half portion in the longitudinal direction is located above the upper surface of the circuit breaker 2, and the other half is fixed to the left surface of the circuit breaker 2 with two mounting bolts. A roller mounting shaft 232 is vertically welded to the left surface of the protruding portion of the roller holding plate 231, and a retaining ring groove is provided around the distal end thereof. Then, the roller mounting shaft 232 is inserted into the roller 23p, and the roller 23p
A retaining ring 233 is attached to a retaining ring groove of a roller mounting shaft 232 protruding to the left side. Thereby, the roller 23
p is restrained from moving in its axial direction, and is pivotally supported so as to be rotatable about the left-right direction.

4 and 5 are side sectional views showing the inside of the circuit breaker chamber 11. FIG. 4 shows a cut-off state of the bus 3a and the branch 3b, and FIG. 5 shows a state of conduction of the bus 3a and the branch 3b. Is shown. At the position of the rear wall of the breaker room 11 corresponding to each primary conductor 24, a prismatic porcelain tube 31 is provided through the rear wall with the opening directed in the front-rear direction. A partition wall 32 is provided in the middle of the bus bar to separate the bus room 3 and the circuit breaker room 11. Further, a narrow plate-shaped conductor portion 33 is provided to penetrate each partition wall 32, and the busbar chamber 3 is provided.
The conductors 33 in the upper row projecting to the side are connected to the bus 3a, and the conductors 33 in the lower row are connected to branch lines.

The buses 3a, 3 opening in the circuit breaker room 11
The insulator tubes 31, 31, 31 on the sides a, 3a are provided with a rectangular plate-shaped shutter 4 made of an insulating material so as to cover all of these openings, whereby each conductor 33 on the bus 3a side is provided. Are shielded from each primary conductor 24 in the upper row.

FIG. 6 is a perspective view showing a main part of the shutter opening / closing device according to the present invention, and FIG. 7 is an exploded perspective view thereof. Insulator pipes 31, 31, 31 on the rear wall of circuit breaker room 11
At a position higher than the upper surface of the porcelain pipes 31, 31, 31 on both left and right sides, a pair of arm support portions 43, 43 made of a short angle member are attached to the rear wall by two mounting bolts on one side. Each arm is fixed, and the other side is arranged perpendicular to the rear wall, and the thickness direction of the other side is opposed to the left and right, and an arm pivot shaft 431 is provided vertically on the other surface that is away from the other side. A pin hole is drilled at the tip of each arm pivot shaft 431 perpendicular to the shaft.

A pair of shutter arms 41p, 41p, which are made of a thin plate member and whose thickness direction is directed to the left and right, face the arm pivot shafts 431, 431 to the mounting holes in the thickness direction drilled at one end thereof. The shutter arm 41p is rotatably supported about the left-right direction. A washer is inserted into the tip of an arm pivot shaft 431 protruding outside each shutter arm 41p, and a split pin is inserted into each of the above-described pin holes, so that an arm pivot shaft of each shutter arm 41p is formed. 431 is prevented from falling off.

The other end of each shutter arm 41p has a plate-shaped shutter holding portion 411 for holding the shutter 4 from behind.
p and 411p are provided respectively so as to be slightly lower than the arm pivot shafts 431 and 431 when the shutter 4 is closed. The shutter 4 is held by the respective shutter holding portions 411p at both left and right end portions of the rear surface thereof, and is fixed from the front surface of the shutter 4 by two mounting bolts. Therefore, the shutter 4 is urged in the closing direction by its own weight and the weight of the shutter arm 41p. A beam pivot shaft 412p is vertically provided substantially at the center of the left side of the left shutter arm 41p in the longitudinal direction, and two pin holes are drilled at its tip at right angles to the axis and parallel in the axial direction. Have been.

One end of a rod-shaped kick-up beam 42p, which is slightly shorter than the depth of the narrow circuit breaker chamber 11,
Plate-shaped beam pivot mounting portion 42 whose thickness direction is directed to the left and right
4p is extended, and its thickness dimension is the beam pivot shaft 4.
It is thinner than the interval between two pin holes provided on 12p. A pin hole is provided at the other end in a direction perpendicular to the axial direction.

The beam pivot shaft mounting portion 424p is provided with a beam pivot shaft mounting hole 422p perforated in the thickness direction.
It has a long hole shape in the longitudinal direction of 2p, and the beam pivot shaft 41
2p is inserted from the right side. Beam pivot 412p
Is inserted through the beam pivot shaft mounting portion 424p to a position where it is disposed between the above-described two pin holes, and is split into pin holes provided at appropriate distances from both sides of the beam pivot shaft mounting portion 424p. By inserting the kick beam 42
The movement of the p on the beam pivot 412p is restricted, and the p is pivotally supported about the left and right direction.

The frame 15 provided on the front side of the circuit breaker chamber 11 is a column member having a U-shape in a cross-sectional view, and is provided with an opening in the cross-sectional view to the right. Then, the arm pivot shaft 4 is located on the right side of the frame 15.
In a position slightly higher than 31, a plate-like beam holding plate 44 p
Is fixed from the right side by two mounting bolts, and its rear end is vertically extended rightward, and a kick-up beam sliding hole 441p is drilled in the thickness direction.

The kick-up beam 42p is inserted from behind into the kick-up beam sliding hole 441p, and the split pin is inserted into the pin hole at the front side of the kick-up beam sliding hole 441p. The kick beam sliding hole is for the kick beam 4
The diameter is slightly larger than 2p, and the kick-up beam 42p is rotatably supported with an appropriate degree of freedom. As described above, the kick-up beam 42p is provided with a low inclination on the rear side, and the lower portion of the peripheral surface thereof has the same height as the top of the roller 23p provided on the circuit breaker 2 at an appropriate front-rear position. It is made to be.

FIG. 8 is an explanatory diagram for explaining the engaged state of the roller 23p and the kick-up beam 42p.
(A) is a plan view of the engaging portion, and (b) of FIG.
It is -A sectional drawing. A guide groove 2 having a semicircular cross-section and having substantially the same shape as the kick-up beam 42p is provided on the peripheral surface of the roller 23p.
The guide groove 234p is engaged with the peripheral surface of the kick-up beam 42p.
The p does not move along the kick-up beam 42p and fall off.

With the above configuration, the gripper 22 is gripped and the circuit breaker 2 is pushed backward, whereby the rollers 23
The shutter 4 is opened by the shutter arm 41p which pivots upward in accordance with the pushing up of the kicking beam 42p in such a manner that p sinks below the kicking beam 42p. At the same time, the primary conductors 24,
24,... Are the buses 3a, 3a, 3a and the branch lines 3b, 3
b, 3b to be in an energized state.

By pulling out the circuit breaker 2 in the opposite direction to the above operation, the roller 23p is disengaged from the front of the kick-up beam 42p, and the shutter 4 is rotated downward by the shutter arm 41 which rotates downward. Will be closed. At the same time, the primary conductors 24, 24,.
3a and the branch lines 3b, 3b, 3b are separated from each other, and are cut off.

At this time, the two split pins inserted into the pin holes on the beam pivot shaft 412p are provided slightly apart from the thickness dimension of the beam pivot shaft mounting portion 422p. Is provided rotatably within an appropriate angle range, so that the bending force in the left-right direction on the kick-up beam 42p caused by the shift in the left-right position of the circuit breaker 2 is absorbed by these portions. You.

Since the kick-up beam 42p has a rod shape, it can be easily inserted into an insulator such as a polyethylene hose having a cylindrical shape whose inner diameter is the same as the outer diameter of the kick-up beam 42p. Can be insulated. Furthermore, the cross-sectional area that cuts the line of magnetic force is small, and deformation due to this is unlikely to occur.

In order to suppress the noise caused by sliding of the kick-up beam 42p in the kick-up beam sliding hole 441p, a resin frame is inserted into the edge of the kick-up beam sliding hole 441p. You can also.

Embodiment 2 FIG. 9 shows the kick-up beam 4
It is a side view which shows the front-back position of 2p. As shown in the drawing, the indication 425p is provided by a paint, a tape, or the like at the engagement portion of the kick-up beam 42p with the beam holding plate 44p, so that the shutter 4 is in the retracted position in the open state (FIG. 9).
(See FIG. 9A), and in the forward position in the closed state (FIG. 9)
(See (b).) By observing the axial position of the kick-up beam 42p, the open / closed state of the shutter 4 can be reliably confirmed.

Embodiment 3 FIG. FIG. 10 is an explanatory diagram for explaining another embodiment of the kick-up beam 42p.
In the above-described embodiment, the beam pivot mounting portion 42
4p shows an example of welding to the kick-up beam 42p, but a male screw is provided at the joint end of the beam pivot shaft mounting portion 424q, and this male screw is attached to a female screw provided at the joint end of the kick-up beam 42q. Fitted and joined. This facilitates replacement of only the beam pivot shaft mounting portion 424q, and facilitates adjustment work such as additional machining of the beam pivot shaft mounting hole 422q by removing the beam pivot shaft mounting portion 424q.

Embodiment 4 FIG. 11 is an explanatory diagram for explaining another embodiment of the kick-up beam 42p.
The kick-up beam 42r is a pipe-shaped member, and the rear end of the kick-up beam 42r is crushed into a plate-like shape.
And Thereby, the weight of the kick-up beam 42p can be reduced, and the driving force for operating the kick-up beam 42p can be further reduced.

Although the shutter opening / closing device in the above-described embodiment is an example in which the shutter opening / closing device is a closed switchboard, the present invention is not limited to this. Can be used.

[0057]

As described above in detail, according to the shutter opening / closing device of the present invention, the kick-up plate provided on the beam is eliminated, the guide groove is provided around the roller, and the beam is directly Because it was configured to contact the roller,
The shape of the beam can be simplified, the driving force for opening and closing the shutter can be reduced, and the beam can be rod-shaped to eliminate corners, thereby reducing frictional resistance with wiring in the switchboard. Therefore, the operation is less likely to be hindered by the wiring. In addition, since the pull-out unit moves the guide groove of the roller in contact with the peripheral surface of the beam and moves along the beam, the roller is dropped from the beam due to a shift in the left-right position of the pull-out unit. Nothing.

Since the beam is provided so as to be allowed to move in the longitudinal direction, the driving force for opening and closing the shutter can be further reduced. Further, since the beam is pivotally supported at one end in the middle of the arm, the beam is pushed and pulled by the swinging position of the shutter, and the position in the longitudinal direction changes. By observing this change, the open / closed state of the shutter can be reliably known.

Since the beam is provided with a display indicating the relative position with respect to another fixing member, the movement of the beam in the longitudinal direction can be made clear. In addition, since the kick plate provided for the beam is eliminated, the beam can be formed in a simple shape such as a rod, insulation is easy, and the influence of the magnetic lines generated in the switchboard is small. The present invention has excellent effects, for example, the weight can be reduced by forming the beam into a pipe shape.

[Brief description of the drawings]

FIG. 1 is a perspective view from the upper right side of the front showing a closed switchboard according to the present invention.

FIG. 2 is a perspective view from the upper front left side showing the configuration of the circuit breaker.

FIG. 3 is an exploded perspective view showing a mounted state of a roller.

FIG. 4 is a side cross-sectional view showing the inside of the circuit breaker room, showing a cut-off state of a bus bar and branch lines.

FIG. 5 is a side cross-sectional view showing the inside of the circuit breaker room, and shows the energized state of a bus and branch lines.

FIG. 6 is a perspective view showing a main part of a shutter opening / closing device according to the present invention.

FIG. 7 is an exploded perspective view of FIG.

FIG. 8 is an explanatory diagram for explaining an engagement state of a roller and a kick-up beam.

FIG. 9 is a side view showing front and rear positions of a kick-up beam.

FIG. 10 is an explanatory diagram for explaining another embodiment of a kick-up beam.

FIG. 11 is an explanatory diagram for explaining another embodiment of a kick-up beam.

FIG. 12 is a perspective view from the upper right side of the front showing the closed switchboard.

FIG. 13 is a perspective view from the upper front left side showing the configuration of the circuit breaker.

FIG. 14 is an exploded perspective view showing a mounted state of a roller.

FIG. 15 is a side cross-sectional view showing the inside of the circuit breaker room, and shows a cutoff state of a bus bar and a branch line.

FIG. 16 is a side cross-sectional view showing the inside of the circuit breaker room, and shows the energized state of a bus and branch lines.

FIG. 17 is a perspective view showing a main part of a shutter opening / closing device.

18 is an exploded perspective view of FIG.

[Explanation of symbols]

1 switchboard housing, 2 breaker, 3 busbar room, 3a
Bus, 3b branch, 4 shutters, 11 breaker room,
23, 23p roller, 24 primary conductor, 41, 41p
Shutter arm, 42, 42p kick-up beam, 2
34, 234p Guide groove, 425p display.

Claims (4)

[Claims] An arm pivotally supported at one end thereof;
A shutter provided at the other end of the arm, a drawer movably provided in a direction to come into contact with and separate from the shutter, and a rotation of the drawer about an axis parallel to a pivot axis of the arm. A roller rotatably supported and having a guide groove formed on the peripheral surface thereof, and one end rotatably supported at one end in the middle of the arm so as to be swingable about an axis parallel to the pivot shaft of the arm. And a beam that swings with the movement of the pull-out means and that opens and closes the shutter in conjunction with the arm. 2. The shutter opening / closing device according to claim 1, wherein the beam is provided so as to be allowed to move in the longitudinal direction. 3. The shutter opening / closing device according to claim 1, wherein the beam has a display indicating a relative position with respect to another fixing member. 4. The shutter opening / closing device according to claim 1, wherein the beam is covered with an insulator.