JPH099425A - Small-sized low-voltage switchboard - Google Patents

Abstract

PURPOSE: To provide a small-sized low-voltage switchboard which can improve the productivity and maintenance and inspection property, without reducing the number of accommodated parts. CONSTITUTION: A truck part 5 is composed, in a box, of a bottom plate 6, a front plate 8, a side plate 8, and a rear plate 9. The truck part 5 is constituted to be pushed in and drawn out freely, with the rollers 10 projected at the edges on both sides of the bottom plate 6 being guided by the guide grooves 4 provided at the opposite inner side faces of the casing 1. Moreover, the side plate 8 and the rear plate 9 are attached capably of standing on their heads to the bottom plate 6, with a hinge 11 as the center of rotation. So, the bottom plate 6, the side plate 8, and the rear plate 9 are developed into plane form by bringing down the side plate 8 and the rear plate 9 outward, in condition that the truck part 5 is pulled out of the casing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized low voltage switchboard used for power distribution or control of a generator or the like.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view showing a conventional small-sized low-voltage switchboard. In FIG. 9, reference numeral 1 is a box-shaped housing having an opening 1a on the front surface, and 2 is attached to the front surface of the housing 1 so as to be openable and closable. The doors 3 are storage components attached to the bottom surface or the inner wall surface of the housing 1 or the back surface of the door 2 and housed in the housing 1,
Examples of the storage parts 3 include a circuit breaker, various control circuits, a charging device, an auxiliary device control circuit, an alarm circuit, a measurement circuit,
Examples include automatic voltage adjustment circuits.

The small low-voltage switchboard configured as described above is
It is usually configured as an integrated device together with a mechanical part and an electric part such as a generator, and is widely used when it is housed in an enclosure, so that physical restrictions are involved. Therefore, it is necessary to realize the required functions and performances under the limited conditions of the casing 1 and to consider productivity and maintainability. To assemble the storage component 3 to this small low-voltage switchboard, open the door 2 and open the front opening 1a of the housing 1.
From the housing 1 to the bottom surface of the housing 1, the inner wall surface or the door 2
It is attached to the back of. At this time, the storage density of the components is increased in consideration of the efficient arrangement of the storage components 3 in the space inside the housing 1. Further, at the time of maintenance and inspection, the door 2 is left open to perform maintenance and inspection work from the front opening 1a of the housing 1.

[0004]

As described above, the conventional small-sized low-voltage switchboard has the housing part 3 from the front opening 1a of the housing 1 as described above.
It is configured to carry out assembly or maintenance inspection of. Therefore, when the storage parts 3 are assembled, the housing 1
It is difficult for a hand or a face to enter through the front opening 1a, it is difficult to assemble the storage components 3 on the bottom surface, the side surface, and the back surface inside the housing 1 with high density, and it is difficult to secure a wiring route, which deteriorates workability. Further, during maintenance and inspection, it is inevitable that the storage parts 3 overlap, and there is a risk that even if an attempt is made to check the back storage part 3, the front storage part 3 will be touched. In order to avoid such a risk, it is possible to temporarily remove the front storage component 3 and inspect the rear storage component 3, but the work efficiency will be significantly reduced. As described above, the conventional small-sized low-voltage switchboard has a problem that productivity and maintainability are deteriorated.

The present invention has been made to solve the above problems, and obtains a small-sized low-voltage switchboard which can remarkably improve productivity and maintainability without reducing the number of storage parts. The purpose is to

[0006]

A small-sized low-voltage switchboard according to the first invention of the present invention has a box-shaped casing having an opening at the front, and a storage component configured to be freely inserted into and removed from the casing through the opening. In a small-sized low-voltage switchboard having an assembled box-shaped bogie part, the bogie part is connected to the bottom plate, a front plate that is attached to the front part of the bottom plate and closes the opening when stored in the housing, and the bottom plate. It is composed of a side plate and a back plate which are attached so as to be upside down with the section as the center of rotation.

Further, a small low voltage switchboard according to a second invention of the present invention is the compact, low voltage switchboard according to the first invention, wherein a notch is formed on at least one of a side surface and a rear surface of the housing, and the carriage is housed in the housing. In this case, the notch is closed by the side plate and the back plate of the truck.

Further, a small-sized low-voltage switchboard according to a third invention of the present invention is, in the above-mentioned first invention, a notch is formed on a back surface of the housing, and when the carriage is housed in the housing,
The notch is closed by the back plate of the trolley part, and a part of the storage component can be projected to the outside from the notch.

Further, a small-sized low-voltage switchboard according to a fourth aspect of the present invention is the one according to any one of the first to third aspects of the invention, wherein the front plate is attached to the bottom plate so as to be openable and closable.

[0010]

In the first aspect of the present invention, the trolley part is pulled out from the housing, and the side plate and the back plate are tilted outward with the connecting part as the center of rotation, whereby the bottom plate, the side plate and the back plate are flat. Be deployed to. Therefore, when assembling the storage components, the storage components can be easily assembled on the bottom plate, the side plate, and the rear plate that are flatly developed from above without putting a hand or face through the narrow front opening of the housing 1. In addition, wiring can be easily provided between the components. In addition, during maintenance and inspection, without putting hands or face through the narrow front opening of the housing 1, there is no overlapping of the storage parts, and the bottom plate, the side plate, and the rear plate that are flatly developed from above are placed. Maintenance and inspection can be performed easily on the assembled storage parts without touching other storage parts.

According to the second aspect of the present invention,
The components of the trolley part also serve as a part of the housing, and the weight of the device can be reduced.

According to the third aspect of the present invention,
The components of the trolley part also serve as a part of the housing, and the weight of the device can be reduced. Moreover, since a part of the storage component is configured to be able to project to the outside from the notch, a part of the cooling device can be projected to the outside of the housing, and the cooling efficiency is improved.

According to the fourth aspect of the present invention,
Since the front plate is attached to the bottom plate so as to be openable and closable, the front plate can be opened while the trolley part is housed in the housing, and simple maintenance and inspection can be performed from the front opening of the housing.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 is a perspective view showing a state in which a trolley portion is pulled out from a small-sized low-voltage switchboard according to Embodiment 1 of the present invention, and FIG.
FIG. 3 is a plan view showing a truck portion of a small low-voltage switchboard according to Embodiment 1 of the present invention, and FIG. 3 is a developed plan view showing a truck portion of a small low-voltage switchboard according to Embodiment 1 of the present invention. The same or corresponding parts as those of the conventional small-sized low-voltage switchboard shown in the figure are denoted by the same reference numerals, and the description thereof will be omitted. In the figure, reference numeral 4 is a guide groove provided respectively on the inner surfaces of the housing 1 which face each other, and 5 is a carriage portion which is guided by the guide groove 4 and can be drawn out to the housing 1. The bottom plate 6, the front plate 7, the pair of side plates 8 and the rear plate 9 are formed in a box shape that opens upward. Rollers 10 are rotatably arranged in front and rear directions on both end surfaces of the bottom plate 6, and the rollers 10 engage with the guide grooves 4 to smooth the operation of moving the carriage 5 in and out. Further, the front plate 7 is integrally attached to the bottom plate 6 and closes the front opening 1a when the dolly portion 5 is inserted into the housing 1 to function as a door of the housing 1. Further, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be upside down with the hinge 11 serving as a connecting member as the center of rotation. Reference numeral 12 is an L-shaped metal fitting that connects the side plate 8 and the back plate 9 when the side plate 8 and the back plate 9 are erected in a U shape on the bottom plate 6.

In order to assemble the storage component 3 into the small-sized low-voltage switchboard constructed as described above, first, the carriage 5 is pulled out from the housing 1. Then, the mounting bolts 13 of the L-shaped metal fitting 12 are removed, and the side plate 8 and the back plate 9 are tilted outward with the hinge 11 as the center of rotation and developed in a plane shape. Therefore, the storage parts 3 are attached to the bottom plate 6, the front plate 7, the side plates 8 and the back plate 9, respectively, and wiring between the storage parts 3 is performed to assemble the storage parts 3 as shown in FIG. Next, the side plate 8 and the back plate 9 are erected with the hinge 11 as the center of rotation, and the mounting bolt 13 is passed through the L-shaped metal fitting 12 attached to the upper inner edge of the back plate 9 and tightened in the screw hole 8a of the side plate 8. Then, the side plate 8 and the back plate 9 are connected to each other, and the dolly portion 5 is assembled as shown in FIG. After that, the roller 10 is fitted into the guide groove 4, the front plate 7 is pushed, and the trolley portion 5 is housed in the housing 1 to complete a small low-voltage switchboard.

Next, when carrying out maintenance and inspection, the carriage unit 5
Is pulled out from the housing 1. Then, the mounting bolts 13 are removed, the side plate 8 and the back plate 9 are developed in a plane shape, and the storage component 3 is maintained and inspected. After that, the side plate 8 and the back plate 9
Is erected, the mounting bolt 13 is tightened via the L-shaped metal fitting 12, the dolly portion 5 is housed in the housing 1, and the maintenance and inspection work is completed.

As described above, according to the first embodiment, the side plate 8 and the back plate 9 which form the carriage portion 5 are attached to the bottom plate 6 by the hinge 1.
Since it is mounted so as to be upside down with 1 as the center of rotation, the side plate 8 and the back plate 9 can be developed in a flat shape when the storage component 3 is assembled, the working space becomes wider, and the storage components 3 do not overlap. Therefore, the storage parts 3 can be assembled to the bottom plate 6, the front plate 7, the side plates 8 and the back plate 9 without any trouble, wiring between the storage parts 3 can be facilitated, and the productivity can be improved without reducing the number of storage parts 3 to be stored. Can be increased. In addition, since the side plate 8 and the back plate 9 can be developed in a flat shape for maintenance and inspection, the storage parts 3 do not overlap each other, and other storage parts that touch the other storage parts 3 or obstruct the same as the conventional device. It is not necessary to remove 3 once, and the work efficiency of maintenance and inspection can be significantly improved.

Embodiment 2 FIG. In the first embodiment, each of the pair of side plates 8 and 8 and the back plate 9 is attached to the bottom plate 6 so as to be upside down with the hinge 11 as the center of rotation, but in the second embodiment, as shown in FIG. As shown, one side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be upside down around the hinge 11 as a rotation center, and the other side plate 8 is attached to the back plate 9.
The hinge 11 is attached so as to be openable and closable around the pivot point. Here, the other side plate 8 is fastened and fixed to the L-shaped metal fitting 12 attached to the bottom plate 6 when it is erected in a U-shape on the bottom plate 6 by the attachment bolts 13 screwed into the screw holes 8a. The other configurations are the same as those in the first embodiment.

In the second embodiment, the mounting bolt 13 is removed while the carriage 5 is pulled out from the housing 1, and the side plate 8 and the back plate 9 are connected to each other, and the side plate 8 and the bottom plate 6 are connected to each other. Release the connection respectively. And one side plate 8
Is tilted outward with the hinge 11 as the center of rotation. Then, the other side plate 8 is opened so as to be flush with the back plate 9 with the hinge 11 as the rotation center, and the back plate 9 is further tilted outward with the hinge 11 as the rotation center, as shown in FIG. The side plate 8 and the back plate 9 are developed in a flat shape. Therefore, the second embodiment
Also in the above, the same effect as that of the first embodiment can be obtained.

Example 3. In the third embodiment, as shown in FIG. 6, the support piece 14 is arranged at one end of the front edge of the bottom plate 6,
A projecting piece 15 protruding from the inner surface of the front plate 7 is rotatably supported on the supporting piece 14 by a shaft 16, so that the front plate 7 is fixed to the bottom plate 6.
It is attached so that it can be opened and closed. In addition, other configurations are
The configuration is similar to that of the first embodiment.

According to the third embodiment, as in the first embodiment, the side plate 8 and the rear plate 9 are attached to the bottom plate 6 so as to be developed in a plane shape, so that the same effect as that of the first embodiment can be obtained. can get. Further, according to the third embodiment, the front plate 7
Is attached to the bottom plate 6 so as to be openable and closable, the front plate 7 is left open while the trolley part 5 is housed in the housing 1 and the front opening 1a of the housing 1 is opened during simple maintenance and inspection work. From now on, maintenance and inspection can be performed, and the maintenance and inspection performance can be further improved.

In the third embodiment, the front plate 7 is rotatably supported by the bottom plate 6 by a cantilevered supporting portion, but the support structure of the front plate 7 is not limited to this. Instead, the front plate 7 may be attached to the bottom plate 6 so as to open and close the front opening 1a.

Embodiment 4 FIG. In the fourth embodiment, as shown in FIG. 7, a pair of guide rails 17 are provided on the bottom of the casing 1 so as to extend in parallel with the loading / unloading direction of the truck 5, and the guide rails are provided on the back surface side of the bottom plate 6 of the truck 5. Wheels (not shown) that run on 17 are provided, and a notch 1 is formed on the side surface of the housing 1.
8 are provided. Note that the other configurations are the same as those in the first embodiment
Is configured similarly to.

According to the fourth embodiment, like the first embodiment, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be developed in a plane, so that the same effect as the first embodiment can be obtained. can get. In addition, in the fourth embodiment, the wheels provided on the back surface of the bottom plate 6 travel on the guide rails 17 to move the dolly unit 5 in and out, so that, as in the first embodiment, the side end surface of the bottom plate 6 is removed. The protruding roller 10 and the guide groove 4 provided on the inner surface of the housing 1 are not required. Then, the bottom plate 6 is expanded to the inner side surface of the housing 1, and the side plate 8 is attached to the edge portion of the bottom plate 6, so that the side plate 8 closes the notch 18 when the dolly unit 5 is housed in the housing 1. Thus, it also serves as a part of the housing 1. Therefore, since the notch 18 is provided in the housing 1, the weight of the small-sized low-voltage switchboard can be reduced.

Embodiment 5 FIG. In the fifth embodiment, as shown in FIG. 8, a notch 19 is provided in the rear surface portion of the housing 1, and the bottom plate 6 is provided.
Is extended to the rear side of the casing 1, the rear plate 9 is attached to the edge portion of the bottom plate 6, and when the dolly unit 5 is housed in the casing 1, the rear plate 9 closes the cutout 19 to close the casing 1. It also serves as a part of. Further, the cooling device 20 of the storage component 3 is attached to the back plate 9 so as to project outward from the notch 19. The other structure is the same as that of the fourth embodiment.

According to the fifth embodiment, similarly to the fourth embodiment, the side plate 8 and the back plate 9 are attached to the bottom plate 6 so as to be able to be developed in a plane, and the back plate 9 closes the notches 19 to form a housing. Since it also serves as a part of the first embodiment,
The same effect can be obtained. Further, in the fifth embodiment, since the cooling device 20 projects outward from the notch 19, the cooling efficiency can be improved.

[0027]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, the bogie portion includes the bottom plate, the front plate that is attached to the front portion of the bottom plate and closes the opening when housed in the housing, and the connecting portion is connected to the bottom plate. Since it is composed of a side plate and a back plate that are installed so as to be upright as the center of motion, the side surface and back plate of the bogie part can be developed in a flat state with the bogie part pulled out from the housing.
The workability of assembling the storage parts and the maintenance and inspection is improved, the number of storage parts is not reduced, and a small low-voltage switchboard with excellent productivity and maintainability is obtained.

According to a second aspect of the present invention, in the first aspect of the invention, a cutout is formed on at least one of the side surface and the back surface of the housing, and when the carriage is housed in the housing. Since the notch is closed by the side plate and the back plate of the truck unit, the components of the truck unit also serve as a part of the housing, and the weight of the device can be reduced accordingly.

According to a third aspect of the present invention, in the first aspect of the present invention, when the notch is formed in the back surface of the housing and the bogie portion is housed in the housing, the back of the bogie portion is accommodated. Since the notch is closed by the face plate, and a part of the storage component can be projected to the outside from the notch, the component of the trolley part also serves as a part of the housing, and the part of the device is accordingly The weight can be reduced and the cooling efficiency can be improved when the cooling device is used as the storage component.

Further, according to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the front plate is attached to the bottom plate so as to be openable and closable, so that the trolley part is a casing. By opening the front plate in the state of being housed in the housing, simple maintenance and inspection can be performed from the front opening of the housing, and the maintenance and inspection performance can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pulled-out state of a trolley portion in a small-sized low-voltage switchboard according to Embodiment 1 of the present invention.

FIG. 2 is a plan view showing a truck portion of a small low-voltage switchboard according to Embodiment 1 of the present invention.

FIG. 3 is a developed plan view showing a truck portion of the small low-voltage switchboard according to the first embodiment of the present invention.

FIG. 4 is a plan view showing a truck portion of a small low-voltage switchboard according to Embodiment 2 of the present invention.

FIG. 5 is a developed plan view showing a truck portion of a small low-voltage switchboard according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing an open state of a front plate of a small low-voltage switchboard according to Embodiment 3 of the present invention.

FIG. 7 is a perspective view showing a pulled-out state of a truck portion of a small-sized low-voltage switchboard according to Embodiment 4 of the present invention.

FIG. 8 is a partially cutaway top view showing a small low-voltage switchboard according to Embodiment 5 of the present invention.

FIG. 9 is a perspective view showing an open state of a conventional small low-voltage switchboard.

[Explanation of symbols]

1 housing, 1a opening, 3 storage parts, 5 truck part, 6
Bottom plate, 7 Front plate, 8 Side plate, 9 Back plate, 11 Hinge (connecting part), 18, 19 Notch, 20 Cooling device (storage part).

Claims (4)

[Claims] 1. A small low-voltage switchboard comprising a box-shaped housing having an opening at a front portion, and a box-shaped trolley portion to which storage parts are assembled so that the housing can be inserted into and removed from the housing through the opening. The trolley unit is attached to a bottom plate, a front plate attached to a front portion of the bottom plate and closing the opening when the trolley unit is housed in the housing, and the trolley unit is attached to the bottom plate so as to be upside down around a connecting portion as a rotation center. A small-sized low-voltage switchboard characterized by comprising a side plate and a back plate. 2. A notch is formed on at least one of a side surface and a back surface of the housing, and when the carriage portion is housed in the housing, the notch is closed by a side plate and a back plate of the carriage portion. The small-sized low-voltage switchboard according to claim 1, wherein the small-size low-voltage switchboard is configured. 3. A notch is formed on the back surface of the housing, and when the dolly part is housed in the housing, the notch is closed by the back plate of the dolly part and one of the storage parts. The small low-voltage switchboard according to claim 1, wherein the portion is configured to be able to project to the outside from the notch. 4. The small low-voltage switchboard according to claim 1, wherein the front plate is attached to the bottom plate so as to be openable and closable.