Switchgear

Abstract

To provide a switchgear that can stably hold a door body that opens and closes an opening of a housing.SOLUTION: A switchgear according to the present embodiment comprises a housing that has an opening, a door body that opens and closes the opening; a support part that rotatably supports the door body; and a holding part that holds, at a predetermined position, the rotation position of the door body relative to the opening.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a switchgear. [Background technology]

[0002] For example, as disclosed in Patent Document 1, a switchgear is provided with a circuit breaker and other components inside a housing that forms its outer shell, and an opening on the rear surface of the housing is configured to be openable and closable by a plate-shaped door. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5378333 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of switchgear, for safety reasons, it is necessary to restrict the opening and closing of the door body during operation. The door body is fastened to the housing, for example, with a bolt. For example, when performing maintenance, operation is stopped and the bolt is removed, allowing the door body to be opened. However, because the door body is plate-shaped and has a simple structure, it is difficult to incorporate a stopper or the like to hold the door body in the open position. This poses a problem: the door body cannot be stabilized in the open position, which reduces workability.

[0005] Therefore, this embodiment provides a switchgear that can stably hold a door that opens and closes an opening in a housing. [Means for solving the problem]

[0006] The switchgear of this embodiment comprises a housing having an opening, a door body that opens and closes the opening, a support part that rotatably supports the door body, and a holding part that holds the rotational position of the door body relative to the opening at a predetermined position. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view schematically illustrating a configuration example of a switchgear according to an embodiment of the present invention. [Figure 2] FIG. 1 is a rear view schematically illustrating an example of the configuration of a switchgear according to an embodiment of the present invention. [Figure 3] FIG. 10 is a rear view schematically illustrating an example of the configuration of a closed position holder and its surrounding parts according to the present embodiment. [Figure 4] FIG. 10 is a cross-sectional plan view illustrating an example of the configuration of the closed position holder and its surroundings when the door body closes the opening according to the present embodiment. [Figure 5] FIG. 10 is a cross-sectional plan view illustrating an example of the configuration of the open position holder and its surroundings when the door body closes the opening according to the present embodiment. [Figure 6] FIG. 10 is a cross-sectional plan view illustrating an example of the configuration of the open position holder and its surroundings when the door body opens the opening according to the present embodiment. [Figure 7] FIG. 10 is a cross-sectional plan view showing a modified example of the embodiment, which is a schematic cross-sectional view showing an example of the configuration of the open position holder and the surrounding area when the door body opens the opening. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of a switchgear will be described below with reference to the drawings. The switchgear 1 illustrated in FIGS. 1 and 2 has a housing 2 that forms the outer shell of the switchgear 1 and is formed in a rectangular box shape. The housing 2 is made of a magnetic material, in this case, a ferromagnetic metal material such as iron. The housing 2 has a generally vertically elongated box shape, with the vertical dimension being longer than the front-to-rear and horizontal dimensions, and the front-to-rear dimension being longer than the horizontal dimension. One surface of the housing 2, in this case the rear surface, is formed with a rectangular opening 3. Multiple openings 3 (two in this case) are provided, separated into upper and lower sections. The openings 3 are also vertically elongated, with the vertical dimension being longer than the horizontal dimension.

[0009] The switchgear 1 also includes a door 4 that opens and closes the opening 3. The door 4 is made of a magnetic material, in this case, a ferromagnetic metal material such as iron. A door 4 is provided at each of the multiple openings 3, and therefore the switchgear 1 is configured with multiple door elements 4 separated vertically, in this case, two. A vertically elongated door base 5 is fastened to the rear surface of the switchgear 1 by a bolt 6, located to the side of the opening 3. The door base 5 is made of a magnetic material, in this case, a ferromagnetic metal material such as iron. The door 4 is supported by a hinge 7 on the door base 5 so as to be rotatable laterally. The hinge 7 is an example of a support portion.

[0010] The switchgear 1 also includes a closed position holder 8 and an open position holder 9 for holding the pivotal position of the door body 4 relative to the opening 3 at a predetermined position. The closed position holder 8 is provided inside the opening 3. More specifically, the closed position holder 8 is provided at the end of the opening 3 opposite the hinge 7. The closed position holder 8 is also provided at the center or central peripheral part in the up-down direction of the opening 3. On the other hand, the open position holder 9 is provided at the end of the surface of the door body 4 on the hinge 7 side. The open position holder 9 is also provided at the center or central peripheral part in the up-down direction of the door body 4.

[0011] The open position holder 9 is located lower than the bolt 6. The upper end of the open position holder 9 is slightly lower than the upper end of the closed position holder 8. The open position holder 9 only needs to be located away from the bolt 6, and therefore may be located higher than the bolt 6, for example. The positions of the closed position holder 8 and the open position holder 9 can be changed as appropriate. The height relationship between the closed position holder 8 and the open position holder 9 can be changed as appropriate. Therefore, for example, the closed position holder 8 and the open position holder 9 may be located at the same height, or the open position holder 9 may be located higher than the closed position holder 8.

[0012] The closed position holder 8 and the open position holder 9 are formed long in the vertical direction, and have screw holes long in the short direction at both ends in the longitudinal direction. Therefore, the attachment position of the closed position holder 8 can be adjusted in the front-to-rear direction at the end of the opening 3 by appropriately changing the position of the screw hole relative to the screw. The attachment position of the open position holder 9 can be adjusted in the lateral direction on the surface of the door body 4 by appropriately changing the position of the screw hole relative to the screw.

[0013] Next, the closed position holder 8 will be described in detail. As shown in Fig. 3, the closed position holder 8 has the magnet 8a exposed to the outside. In this case, the magnet 8a has a plate-like shape that is long in the vertical direction. The closed position holder 8 also has a plurality of magnets 8a arranged in multiple rows (two rows in this case) in the vertical direction and multiple columns (two rows in this case) in the horizontal direction.

[0014] 4, the closed position holder 8 is configured so that when the door body 4 closes the opening 3, the multiple magnets 8a come into contact with the inner surface of the door body 4. As a result, the door body 4 is held by the magnetic force of the closed position holder 8 in the position where the opening 3 is closed.

[0015] The switchgear 1 is provided with a handle portion 10 on the surface of the door body 4. In this case, the handle portion 10 is provided on the end portion of the surface of the door body 4 opposite the hinge 7. The handle portion 10 is also provided in the center or central peripheral portion in the up-down direction of the door body 4. The handle portion 10 is also provided in a position facing the closed position retaining portion 8 when the door body 4 closes the opening 3.

[0016] Next, the open position holder 9 will be described in detail. As shown in Fig. 5, the open position holder 9 exposes the magnet 9a in the horizontal direction when the door body 4 closes the opening 3. Although detailed illustration is omitted, in this case the magnet 9a also has a plate-like shape that is long in the vertical direction. The open position holder 9 also has a plurality of magnets 9a arranged in multiple rows (two rows in this case) in the vertical direction.

[0017] 6, the open position holder 9 is configured so that when the door 4 is open at a predetermined angle, in this case 90 degrees, relative to the opening 3, the multiple magnets 9a come into contact with the surface of the door base 5. As a result, the door 4 is held by the magnetic force of the open position holder 9 in the open position at the predetermined angle, in this case 90 degrees, relative to the opening 3.

[0018] The switchgear 1 also includes an adjustment member 11 between the door body 4 and the open position retaining portion 9. The adjustment member 11 is an example of an adjustment portion. In this case, the adjustment member 11 is configured by bending a plate-shaped member, and includes a main body portion 11a and a bent portion 11b. The bent portion 11b is bent so as to form a right angle with respect to the main body portion 11a.

[0019] The adjustment member 11 is attached by, for example, screws or welding, with the main body 11a interposed between the door body 4 and the open position holder 9 and the bent portion 11b abutting against the end face of the open position holder 9 opposite to the magnet 9a. The adjustment member 11 may be made of, for example, a metal material or a resin material.

[0020] If the adjustment member 11 were not attached, some of the magnets 9a of the open position holder 9 would come off the surface of the door base 5 and would not be able to make contact when the door 4 is in the open position as shown in Fig. 6. This would weaken the effect of the open position holder 9 in holding the door 4 in the open position, and there is a risk that the door 4 will not be stably held in the open position.

[0021] Therefore, by appropriately changing the thickness of the adjustment member 11, particularly the thickness of the main body 11a, it is possible to adjust the attachment position of the open position holder 9 relative to the door body 4 so that when the door body 4 is open at a predetermined angle, in this case 90 degrees, relative to the opening 3, all of the magnets 9a of the open position holder 9 face the door body base 5 of the housing 2. This allows the magnets 9a of the open position holder 9 to come into contact with the surface of the door body base 5 when the door body 4 is in the open state, making it possible to stably hold the door body 4 in the open state.

[0022] 2, the switchgear 1 includes various components inside the housing 2, such as various devices including circuit breakers, measuring instruments, and relays, as well as pillars for holding wiring, and structures for grounding. These components exist as objects 12 having a predetermined shape in the space inside the housing 2. The closed position holder 8 and the open position holder 9 are provided in positions inside the housing 2 that do not face the objects 12.

[0023] The switchgear 1 according to this embodiment is provided with a closed position holder 8 and an open position holder 9 that hold the rotation position of the door body 4 at a predetermined position relative to the opening 3. According to this configuration example, the door body 4 that opens and closes the opening 3 of the housing 2 can be stably held by the closed position holder 8 and the open position holder 9.

[0024] Furthermore, according to the switchgear 1, the door body 4 is made of a magnetic material, and the closed position holder 8 and the open position holder 9 hold the door body 4 in a predetermined position by magnetic force. According to this configuration example, the door body 4 can be held more stably by utilizing magnetic force.

[0025] Furthermore, according to the switchgear 1, the closed position holder 8 has a magnet 8a at the opening 3, and the door body 4 is held by the closed position holder 8 at a position where the opening 3 is closed. According to this configuration example, the door body 4 can be stably held by magnetic force in a state where the door body 4 closes the opening 3. Therefore, the door body 4 can be stably held at the closed position without fastening the door body 4 to the housing 2 with a bolt.

[0026] As shown in FIG. 1, the switchgear 1 has bolt holes 13 on the opposite side of the hinge 7 around the opening 3, and bolt holes 14 on the opposite side of the hinge 7 in the door body 4. As shown in FIG. 2, when the door body 4 closes the opening 3, bolts 15 can be fastened to the bolt holes 13 and 14. By fastening with the bolts 15 in this way, the magnetic force of the closed position holder 8 and the fastening force of the bolts 15 can be utilized to more stably hold the door body 4 in the closed position. Also, it is possible to more reliably prevent the door body 4 from opening unintentionally.

[0027] Furthermore, according to the switchgear 1, the open position holder 9 has a magnet 9a on the door body 4, and the door body 4 is held by the open position holder 9 in an open position at a predetermined angle relative to the opening 3. According to this configuration example, the door body 4 can be stably held by magnetic force in a state in which the door body 4 is open at a predetermined angle relative to the opening 3. Therefore, the door body 4 can be stably held in the open position without incorporating a stopper or the like in the door body 4.

[0028] Furthermore, according to the switchgear 1, by appropriately changing the thickness of the adjustment member 11, it is possible to adjust the attachment position of the open position holder 9 relative to the door body 4 so that the magnet 9a of the open position holder 9 faces the door body base 5 of the housing 2 when the door body 4 is open at a predetermined angle relative to the opening 3. By appropriately adjusting the position using the adjustment member 11 in this way, it is possible to hold the door body 4 in the open position more stably.

[0029] Moreover, according to the switchgear 1, the door body 4 is provided with a handle portion 10. According to this configuration example, an operator can easily open and close the door body 4 by gripping the handle portion 10. In particular, since the door body 4 is formed in a thin plate shape, it is difficult for an operator to hook his or her fingers on the door body 4 itself. Therefore, by providing the handle portion 10 on such a door body 4, opening and closing the door body 4 can be made even easier.

[0030] Furthermore, according to the switchgear 1, the door body 4 is divided into multiple pieces in the vertical direction. If a configuration were considered in which a single vertically long door body 4 were provided on the rear surface of the housing 2, there would be a concern that the thin, plate-like door body 4 would be prone to bending, making it difficult to open and close. In contrast, according to the door body 4 divided into multiple pieces in the vertical direction, each door body 4 is less likely to bend, making it easy to open and close.

[0031] Furthermore, according to the switchgear 1, the closed position holder 8 and the open position holder 9 are provided at positions that do not face the object 12 inside the housing 2. According to this configuration example, the closed position holder 8 and the open position holder 9 for stably holding the door body 4 can be arranged reasonably without changing the layout inside the housing 2.

[0032] Note that this embodiment is not limited to the above-described embodiment, and modifications and extensions can be made as appropriate without departing from the spirit of the present invention. For example, the switchgear 1 may be configured to have one opening 3 on the rear surface of the housing 2, and this one opening 3 may be opened and closed by multiple doors 4, or this one opening 3 may be opened and closed by one door 4. If one opening 3 provided on the rear surface of the housing 2 is configured to be opened and closed by one door 4, the door 4 may become long and may be prone to bending. However, for example, by providing a structure or member that reinforces the door 4, bending of the door 4 can be sufficiently suppressed.

[0033] 7, the adjusting member 11 may have a main body 11a that is not plate-shaped but has a triangular, so-called "wedge" shape. This configuration example makes it possible to stably hold the door 4 in an open position at an angle other than 90 degrees relative to the opening 3.

[0034] The switchgear 1 may be configured to lock the door 4 that closes the opening 3 with a key, in addition to or instead of the bolt 15. The switchgear 1 may be configured to lock the door 4 that closes the opening 3 with a locking device called an "interlock", in addition to or instead of the bolt 15. These configuration examples make it possible to more stably hold the door 4 in the closed position and more reliably prevent the door 4 from opening unintentionally.

[0035] Although one embodiment of the present invention has been described above, this embodiment is presented merely as an example and is not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. The present embodiment and its modifications are included within the scope and spirit of the invention, and are also included in the inventions described in the claims and their equivalents. [Explanation of symbols]

[0036] In the drawings, 1 indicates a switchgear, 2 indicates a housing, 3 indicates an opening, 4 indicates a door body, 7 indicates a hinge (support part), 8 indicates a holding part for a closed position (holding part), 9 indicates a holding part for an open position (holding part), 8a, 9a indicate magnets, 10 indicates a handle part, 11 indicates an adjustment member (adjustment part), and 12 indicates an object inside the housing.

Claims

1. a housing having an opening; a door body that opens and closes the opening; a support portion that rotatably supports the door body; a holding portion that holds the pivotal position of the door body relative to the opening at a predetermined position; A switchgear comprising:

2. The door is made of a magnetic material, The switchgear according to claim 1 , wherein the holding portion holds the door body at a predetermined position by magnetic force.

3. the holding portion includes a magnet in the opening, The switchgear according to claim 2 , wherein the door body is held by the holding portion in a position where the opening is closed.

4. the housing is made of a magnetic material, The holding portion includes a magnet on the door body, The switchgear according to claim 2 , wherein the door is held by the holding portion in an open position at a predetermined angle relative to the opening.

5. an adjustment portion is provided between the door body and the holding portion; The switchgear according to claim 4, wherein the adjustment unit adjusts an attachment position of the holding unit relative to the door body so that the magnet faces the housing when the door body is open at a predetermined angle relative to the opening.

6. The switchgear according to claim 1 , wherein the door body is provided with a handle portion.

7. The switchgear according to claim 1 , wherein the door body is divided into a plurality of sections in the vertical direction.

8. The switchgear according to claim 1 , wherein the holding portion is provided at a position that does not face an object inside the housing.

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