Switching devices and electrical and electronic equipment storage boxes

Abstract

To mount a handle to be used from a front side of a changeover switching device in a case where it is desired to change over a supply source of a power source by man power.SOLUTION: The present invention relates to a changeover switching device 1 comprising: a main circuit unit 10 capable of changing over a power source supplying power to a load apparatus between a first power source and a second power source; and a control unit 30 which controls the changeover of the power source supplying power to the load apparatus. In the changeover switching device, the main circuit unit includes: a first power source side terminal section 11 which is connectable with the first power source; a second power source side terminal section 12 which is connectable with the second power source; and a load side terminal section 13 which is connectable with the load apparatus. The control unit includes a handle mounting part 42 to which an attachable and detachable handle 81 is mounted, such that the power source can be manually changed over. A hole 37 into which the handle can be inserted from a front side when mounting the handle to the handle mounting part is provided at the front side of a case member 31 of the control unit.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a changeover switch device that switches a power source for supplying power to a load device between a first power source and a second power source, and to a box for housing an electric / electronic device. [Background technology]

[0002] As described in Patent Document 1, a switching device is known that includes a control unit that automatically switches between a commercial power source, which is a first power source, and a distributed power source, which is a second power source. This switching device is equipped with a handle that can be manually switched to check whether the electric wires are properly connected. The handle disclosed in Patent Document 1 is configured to be connected from the side to a handle mounting portion exposed on the side of the switching device, thereby enabling manual switching. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-123296

[0004] In a changeover switchgear having such a configuration, since the handle mounting portion must be connected from the side, it may be difficult to see the handle mounting portion, and it may be difficult to mount the handle on the handle mounting portion. For example, when the changeover switchgear is installed in a box for storing electrical and electronic equipment, such as a distribution board, switchboard, or high-voltage power receiving equipment, it may be impossible to look into the side of the changeover switchgear, making it difficult to mount the handle. Furthermore, since the changeover switchgear needs to be installed inside the box for storing electrical and electronic equipment in consideration of attaching the handle to the side of the changeover switchgear, it is necessary to ensure extra space around the changeover switchgear. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present invention have studied this issue extensively and have attempted to solve it. The problem that the present invention aims to solve is to make it possible to attach a handle that is used when manually switching the power supply source to the front side of the switching device. [Means for solving the problem]

[0006] In order to solve the above problems, a switching switch device is provided which includes a main circuit unit which can switch the power source supplied to a load device between a first power source and a second power source, and a control unit which controls the switching of the power source supplied to the load device, wherein the main circuit unit includes a first power source side terminal portion which can be connected to the first power source, a second power source side terminal portion which can be connected to the second power source, and a load side terminal portion which can be connected to the load device, and the control unit includes a handle attachment portion which can be attached with a handle which can be attached and detached to enable manual switching of the power source, and when attaching the handle to the handle attachment portion, a hole is provided on the front side of the case member of the control unit into which the handle can be inserted from the front side.

[0007] It is also preferable that the control unit be configured to have a handle support portion on the side thereof that can support the handle separated from the handle attachment portion.

[0008] Furthermore, it is preferable that the load side terminal portion is provided with a rotating member that rotates to switch the power source supplied to the load device between the first power source and the second power source, the control unit is provided with a shaft that engages with the rotating member, and the shaft is provided with a handle attachment portion, so that when a handle is attached to the handle attachment portion, the shaft and the rotating member work together to switch the power source by moving the handle, and when a handle is not attached to the handle attachment portion, the shaft is moved by an electrical force generated by the control unit, so that the shaft and the rotating member work together to switch the power source.

[0009] Furthermore, it is preferable that the main circuit unit be configured to include a plurality of switches each having a first power supply side terminal portion, a second power supply side terminal portion, and a load side terminal portion, with the rotating members of each switch connected in an interlocked state, allowing the switches to operate in conjunction with each other when the power source is switched.

[0010] It is also preferable that the switcher switch device is provided as a storage box for electric and electronic equipment. [Effects of the Invention]

[0011] In the present invention, when it is desired to manually switch the power supply source, the handle to be used can be attached from the front side of the switching switch device. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a changeover switching device according to an embodiment. [Figure 2] 2 is a front view of the changeover switchgear shown in FIG. 1, with the terminal cover omitted. [Figure 3] FIG. 2 is an exploded perspective view of the main circuit unit according to the embodiment. [Figure 4] 1 is a side view of a main circuit unit according to an embodiment, with a part of the case separated. [Figure 5] 10A and 10B are diagrams showing states before and after the pivoting member and its shaft are connected. [Figure 6] FIG. 2 is an exploded perspective view of the changeover switch device according to the embodiment. [Figure 7] FIG. 7 is an exploded perspective view of the changeover switchgear shown in FIG. 6 with the second case removed. [Figure 8] FIG. 8 is an exploded perspective view of the changeover switchgear shown in FIG. 7 with a second case and a switch unit removed. [Figure 9] FIG. 9 is an exploded perspective view of the switching unit shown in FIG. 8. [Figure 10] FIG. 10 is an exploded perspective view of the switching section shown in FIG. 9. [Figure 11] 10A and 10B are diagrams illustrating an example of the movement of the switching unit according to the embodiment. [Figure 12] 1. FIG. 5 is a diagram showing a modified example of the switch opening and closing device in which a handle support portion different from that in FIG. [Figure 13] 1 is a diagram showing a state in which a handle is attached to the switching opening and closing device of the embodiment. FIG. [Figure 14] 14 is a diagram showing a state in which the second case is separated from the changeover switching device in the state shown in FIG. 13. FIG. [Figure 15] 15 is a diagram showing the handle being rotated to switch the power source in the switcher switching device shown in FIG. 14. FIG. [Figure 16] FIG. [Figure 17] 10A and 10B are diagrams showing an example in which a cam is moved by moving an operating pin to switch a switch between on and off. [Figure 18] FIG. 2 is a perspective view of a cover of the switching device according to the embodiment. [Figure 19] FIG. 19 is a perspective view of the cover shown in FIG. 18 as seen from the opposite side. [Figure 20] FIG. 2 is a perspective view of a first cam in the embodiment. [Figure 21] FIG. 21 is a perspective view of the first cam shown in FIG. 20, seen from a different angle. [Figure 22] 10A and 10B are diagrams illustrating an example of cam movement when the cover is opened and closed. [Figure 23] 10A and 10B are diagrams illustrating an example of the relationship between the movement of the cam and the on / off state of the switch when the cover is opened and closed. [Figure 24] FIG. 10 is a diagram showing an example in which a switching switchgear is installed in a distribution board. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of the invention is described below. In the following description of the diverter switchgear 1, the side that faces the installation location when installed is referred to as the installation surface side, and the side opposite the installation surface side is referred to as the front side. The diverter switchgear 1 of the embodiment can automatically switch the power source that supplies power to the load equipment between a first power source and a second power source during a power outage or the like. Therefore, as can be seen from FIGS. 1 to 4 , the diverter switchgear 1 of the embodiment includes a main circuit unit 10 that can switch the power source that supplies power to the load equipment between the first power source and the second power source, and a control unit 30 that controls the switching of the power source that supplies power to the load equipment.

[0014] This changeover switchgear 1 includes a main circuit unit 10 having a first power source side terminal 11 connectable to a first power source, a second power source side terminal 12 connectable to a second power source, and a load side terminal 13 connectable to a load device. More specifically, the main circuit unit 10 includes the first power source side terminal 11 connected to a first power source, such as a commercial power source, on one side, the second power source side terminal 12 connected to a second power source, such as a distributed power source, on the other side, and the load side terminal 13 connected to a load device. In the example shown in FIG. 1 , the first power source side terminal 11, the second power source side terminal 12, and the load side terminal 13 are covered by a terminal cover 19 to prevent accidental contact therewith. Examples of distributed power sources include those utilizing renewable energy such as solar power generation and wind power generation, as well as fuel cells and storage batteries.

[0015] The main circuit unit 10 of the embodiment is provided with a switch 14 in which a first power supply side terminal portion 11, a second power supply side terminal portion 12, and a load side terminal portion 13 are housed in a case. The switches 14 may be connected in the number of poles required, but in the example shown in Figures 1 to 3, three switches 14 are connected to form a three-pole main circuit unit 10.

[0016] 4, the first power source side terminal portion 11 of the embodiment includes a terminal 11b having a contact 11a and a terminal screw 11c for connecting an electric wire to the terminal 11b. The second power source side terminal portion 12 also includes a terminal 12b having a contact 12a and a terminal screw 12c for connecting an electric wire to the terminal 12b. Meanwhile, the load side terminal portion 13 of the embodiment includes a rotating member 13d that rotates around a connecting pin 15 inserted into the axial hole, a contactor 13e having a contact 13a that comes into contact with the contact 11a of the first power source side terminal portion 11 or the contact 12a of the second power source side terminal portion 12, a terminal 13b that is electrically connected to the contactor 13e via an electrical circuit member, and a terminal screw 13c for connecting an electric wire to the terminal 13b.

[0017] When switching the power source for supplying power to the load device between the first power source and the second power source, the contactor 13e is rotated by rotating the rotating member 13d, whereby the contact point 13a of the contactor 13e is switched between the contact 11a of the first power source side terminal portion 11 and the contact 12a of the second power source side terminal portion 12, and the source of power supply to the load device is switched between the first power source and the second power source.

[0018] In the embodiment, openings 14b are provided in cases 14a that form the outer shells of switches 14, exposing connecting portions 13f of rotating members 13d, and switches 14 are connected to each other by connecting portions 13f exposed from openings 14b (see FIG. 3). In the embodiment, concave connecting portions 13f are provided on one side surface of rotating member 13d, and convex connecting portions 13f are provided on the other side surface. Convex connecting portion 13f of rotating member 13d of one switch 14 is fitted with convex connecting portion 13f of rotating member 13d of another switch 14, and connecting pin 15 is inserted into an axial hole of rotating member 13d, connecting multiple switches 14 so that they move integrally (see FIG. 5).

[0019] The rotating member 13d of the switch 14 adjacent to the control unit 30 has a recessed connection portion 13f provided on its side surface, which is fitted with the shaft 41 of the control unit 30, so that the rotating member 13d rotates in conjunction with the shaft 41. In other words, the rotating member 13d rotates in conjunction with a change in the angle of the shaft 41, and the contact between the contactor 13e and the contact 13a is switched between the contact 11a of the first power source side terminal portion 11 and the contact 12a of the second power source side terminal portion 12.

[0020] As can be seen from the above, the main circuit unit 10 preferably includes a plurality of switches 14 each having a first power supply side terminal portion 11, a second power supply side terminal portion 12, and a load side terminal portion 13, and the rotating members 13d of each switch 14 are connected in a fitted state, allowing the switches 14 to move in conjunction with each other when switching the power source. In this way, the rotating members 13d can be easily connected to each other, and the switches 14 can be easily connected. Furthermore, if a plurality of similar switches 14 are prepared and connected, the number of parts can be reduced.

[0021] Furthermore, it is preferable that the load side terminal portion 13 includes a rotating member 13d that rotates to switch the power source for supplying power to the load device between the first power source and the second power source, and that the control unit 30 includes a shaft 41 that fits with the rotating member 13d, and that the shaft 41 is provided with a handle attachment portion 42. In this way, the shaft 41 having the handle attachment portion 42 and the rotating member 13d fit together and move in conjunction with each other, thereby enabling the power source to be switched.

[0022] Furthermore, when the handle 81 is attached to the handle attachment portion 42, it is preferable that the shaft 41 and the rotating member 13d be linked together to switch the power supply by moving the handle 81, and when the handle 81 is not attached to the handle attachment portion 42, it is preferable that the shaft 41 and the rotating member 13d be linked together to switch the power supply by moving the shaft 41 with an electrical force generated by the control unit 30. In this way, it is only necessary to move the shaft 41 whether performing an electrical operation or a manual operation, which makes it possible to reduce the number of parts.

[0023] Next, we will provide a detailed description of the control unit 30. The control unit 30, which is connected to the main circuit unit 10, is connected to the side of the main circuit unit 10. This control unit 30 can perform control to switch the power supply source to the load side terminal section 13 of the main circuit unit 10 between the first power source and the second power source.

[0024] The control unit 30 of the embodiment has a main outer shell formed of a case member 31. The case member 31 of the embodiment is box-shaped and made up of a first case 31a and a second case 31b, and houses a changeover unit 32 and a switch unit 33 (see FIGS. 6 to 8). In the embodiment, the first case 31a of the control unit 30 and the switch 14 adjacent to the first case 31a are fixed with screws or the like, thereby fixing the main circuit unit 10 and the control unit 30. At this time, the switches 14 are also fixed to each other by using screws that penetrate all of the switches 14 constituting the main circuit unit 10 and the first case 31a.

[0025] In the embodiment, the switching unit 32 provided in the control unit 30 includes a switching section 32a, a first solenoid 32b, a second solenoid 32c, a first relay unit 32d, and a second relay unit 32e (see Figures 8 and 9).

[0026] The switching unit 32a of the embodiment has an operating pin 32aa inserted through its center, and includes a support base 32ab that supports each component, a connecting member 32ac that can connect the first movable iron core 32ba provided in the first solenoid 32b and the second movable iron core 32ca provided in the second solenoid 32c to its ends, the operating pin 32aa inserted through the connecting member 32ac, a switching member 32ad through which the operating pin 32aa is inserted together with the connecting member 32ac, a shaft 41 inserted through the switching member 32ad, and a display member 32ae through which the shaft 41 is inserted together with the switching member 32ad (see Figure 10).

[0027] In this embodiment, the first solenoid 32b includes a first coil 32bb, a first fixed core provided within the coil 32bb, a first movable core 32ba that moves within the first coil 32bb, and a frame 32bc that covers the first coil 32bb. The second solenoid 32c includes a second coil 32cb, a second fixed core provided within the second coil 32cb, a second movable core 32ca that moves within the second coil 32cb, and a frame 32cc that covers the second coil 32cb. In each solenoid, the movable core is disposed so as to protrude from the end of the coil opposite the end where the fixed core is provided.

[0028] The first relay unit 32d includes at least a circuit board 32dc to which a relay 32db is connected via a connector 32da. The second relay unit 32e includes at least a circuit board 32ec to which a relay 32eb is connected via a connector 32ea. These relay units, together with a switch unit 33 (described later), control the flow of electricity to the solenoid coil.

[0029] Here, an example of switching using the control unit 30 will be described. However, the explanation will be given by taking an example in which the power source supplied to the load device by the control unit 30 is switched from the second power source to the first power source. Note that the flow of operation is similar even when switching from the first power source to the second power source, so the explanation of that example will be omitted.

[0030] First, an example of electrical switching will be described. When switching is performed electrically, a current is applied to the first coil 32bb of the first solenoid 32b. This generates a magnetic field at the center of the first coil 32bb, which causes the magnetized first movable core 32ba to be attracted to the first fixed core. As the first movable core 32ba is attracted, the connecting member 32ac, to which the tip of the first movable core 32ba is connected, moves toward the first power source (see FIG. 11).

[0031] This movement of the connecting member 32ac causes the operating pin 32aa inserted through the connecting member 32ac to move toward the first power source. When the operating pin 32aa moves, the angle of the switching member 32ad through which the operating pin 32aa is inserted is changed. This change in the angle of the switching member 32ad changes the angle of the shaft 41 connected to the switching member 32ad. This change in the angle of the shaft 41 causes the rotating member 13d of the switch 14 fitted to the shaft 41 to rotate. As the rotating member 13d rotates, the contact 13a of the load side terminal 13, which is in contact with the contact 12a of the second power source side terminal 12, comes into contact with the contact 11a of the first power source side terminal 11. Note that this change in the angle of the shaft 41 causes the angle of the indicator member 32ae connected to the shaft 41 to change. Changing the angle of the indicator member 32ae can indicate that the load side terminal 13 is connected to the first power source side terminal 11.

[0032] Next, an example of manual switching will be described. In the case of manual switching, switching is performed using a handle 81 that is detachable from the changeover switch device 1. The shaft 41 has a handle attachment portion 42 at the end opposite to the end where the switch 14 is fitted.

[0033] First, the handle 81 is attached to the handle attachment portion 42. The handle 81 is tilted from the second power source side to the first power source side. By tilting the handle 81, the angle of the shaft 41 is changed. By changing the angle of the shaft 41, the rotating member 13d of the switch 14 fitted to the shaft 41 is rotated. By rotating the rotating member 13d, the contact 13a of the load side terminal portion 13, which is in contact with the contact 12a of the second power source side terminal portion 12, comes into contact with the contact 11a of the first power source side terminal portion 11. Note that by changing the angle of the shaft 41, the angle of the indicator member 32ae, which is connected to the shaft 41, is changed. By changing the angle of the indicator member 32ae, it is possible to indicate that the load side terminal portion 13 is connected to the first power source side terminal portion 11, as in the example above. When the work is completed, the handle 81 can be removed from the handle attachment portion 42.

[0034] If a handle support part capable of supporting the handle 81 separated from the handle attachment part 42 is provided on the side of the control unit 30, it is possible to prevent the handle 81 removed from the handle attachment part 42 from being lost.

[0035] In Fig. 1, a protrusion 35 provided on the side surface of the control unit 30 serves as the handle support portion. In this case, a hole is provided in the handle 81, and the protrusion 35 is inserted into the hole so that the handle 81 can be supported on the side surface of the control unit 30. In the example shown in Fig. 1, two holes are provided at intervals in the longitudinal direction of the handle 81, and the protrusions 35 are formed to correspond to the holes. By forming the handle support portion in the form of a protrusion, it is possible to prevent the handle 81 from falling off the handle support portion even if vibrations are applied or the orientation is changed, for example, when the switcher switching device 1 is transported.

[0036] The handle support portion may have other configurations. In the example shown in Fig. 1, two protrusions 35 are provided as the handle support portion to prevent the handle 81 supported by the handle support portion from rotating, but it is also possible to use only one protrusion 35. In this case, it is preferable to provide a surface or the like to prevent rotation.

[0037] For example, a protrusion corresponding to a hole provided in the handle 81 for insertion into the handle mounting portion 42 is provided on the control unit 30. In this case, if the control unit 30 is installed with the front side facing upward and the installation surface side facing downward, the handle 81 supported by the handle support portion may rotate toward the installation surface around the protrusion as an axis. Therefore, to prevent the handle 81 from rotating toward the installation surface, a surface is formed on the control unit 30 so as to support the surface of the handle 81 facing the installation surface. In this case, the surface does not need to be wide, as long as it is large enough to prevent the handle 81 from rotating.

[0038] Also, a handle support portion can be formed by a storage space formed by the side surface of the control unit 30 and multiple surfaces. In this case, by storing the handle 81 in the storage space, the handle 81 is supported on the side surface of the control unit 30.

[0039] In the example shown in FIG. 12, the handle support portion is formed by providing a receptacle portion 36 shaped like a cutout on a portion of the front side and the surface on the first power source side, so that the handle 81 can be inserted from the front side and the first power source side. The reason why a surface is left on the front side is that the changeover switching device 1 may be installed with the first power source side facing upward and the second power source side / load side facing downward. In this case, this is to prevent the handle 81 from tipping forward and falling off the handle support portion. As can be seen from this example, when a storage space is provided to form the handle support portion, the handle can be supported simply by storing the handle in the storage space. Therefore, the handle 81 can be easily inserted and removed from the handle support portion.

[0040] As can be seen from the example shown in FIG. 1 , in the embodiment, the control unit 30 is provided with a handle attachment section 42 that allows for manual switching of the power source by attaching a handle 81 that can be attached and detached to the control unit 30, so that the power source can be easily switched manually between the first power source and the second power source. When attaching the handle 81 to the handle attachment section 42, a hole 37 into which the handle 81 can be inserted from the front side is provided on the front side of the case member 31 of the control unit 30 (see FIGS. 1 , 2 , 13 , and 14 ). This makes it possible to attach the handle 81 to be used from the front side of the switching switchgear 1 when manually switching the power source. Note that in the embodiment, when manually switching between the first power source and the second power source, the handle 81 can be attached to the handle attachment section 42 and then moved to change the angle of the handle 81 relative to the switching switchgear 1 (see FIG. 15 ).

[0041] Incidentally, rather than configuring the handle mounting portion 42 so that it is always exposed, it is preferable to configure the switch switch device 1 with a cover 38 that can cover the handle mounting portion 42. In this way, it is possible to prevent dust from accumulating on the handle mounting portion 42 and unnecessary mounting and operation of the handle 81.

[0042] In addition, if the case member 31 of the control unit 30 is provided with a handle attachment section 42 to which a handle 81 can be attached when manually switching the power supply to the load equipment, and the case member 31 is provided with a hole 37 that allows access to the handle attachment section 42, it is preferable that the cover 38 be configured to be able to cover the hole 37 that allows access to the handle attachment section 42.

[0043] In this embodiment, a handle attachment portion 42 is provided at the end of a shaft 41 provided on the control unit 30, and a hole 37 is formed in the case member 31 by cutting out a portion of the front side of the second case 31b of the control unit 30, making it possible to access the handle attachment portion 42 arranged inside the case member 31. In addition, a cover 38 that can be opened and closed and that can cover the hole 37 provided in the case member 31 is provided on a portion of the second case 31b. By opening the cover 38, the handle attachment portion 42 can be accessed, and by closing the cover 38, the hole 37 that allows access to the handle attachment portion 42 can be covered.

[0044] Of course, a part of the first case 31a of the control unit 30 may be cut out and covered with the cover 38. Alternatively, by providing a cutout in both the first case 31a and the second case 31b of the control unit 30, the hole 37 extending from the first case 31a to the second case 31b may be covered with the cover 38.

[0045] In addition, when a hole 37 through which the handle mounting portion 42 can be accessed is provided on the side of the switching opening / closing device 1 (for example, on the side of the second case 31b of the control unit 30), a cover 38 that can cover the hole 37 may be provided.

[0046] Next, we will explain the switch unit 33 provided in the control unit 30. The switch unit 33, together with the relay unit, is used to control the supply of electricity to the solenoid coil. The switch unit 33 is housed in and protected by the case member 31 of the control unit 30.

[0047] The switch unit 33 preferably includes at least a switch section 33a and two substrates 33b (see FIG. 7). The switch section 33a preferably includes at least a first switch 33aaa and a second switch 33ab that control the flow of current to the coil, a first cam 33ac and a second cam 33ad that are used to turn the switch section 33a on and off, a spring 33ae that biases the first cam 33ac, a spring 33af that biases the second cam 33ad, and a base 33ag that houses them (see FIG. 16). The base 33ag in this embodiment is provided with a first opening 33ag1 through which the shaft 41 is inserted and a second opening 33ag2 through which the operation pin 32aa is inserted.

[0048] Here, the relationship between the operation pin 32aa and the switch unit 33 will be described. When the operation pin 32aa, inserted through the second opening 33ag2 provided in the base 33ag of the switch unit 33, is moved, its end can be brought into contact with the first cam 33ac or the second cam 33ad (see FIG. 17 ). For example, when the first movable iron core 32ba is attracted to the first coil 32bb, the connecting member 32ac moves toward the first power source, and the operation pin 32aa also moves toward the first power source. The end of the operation pin 32aa comes into contact with the first cam 33ac and can be pushed toward the first power source. The first cam 33ac, pushed toward the first power source by the operation pin 32aa, rotates around its axis, turning off the first switch 33aa. This state continues until the operation pin 32aa moves toward the second power source. When the operation pin 32aa moves toward the first power source, the contact between the operation pin 32aa and the second cam 33ad is released. Accordingly, the second cam 33ad rotates due to the bias of the spring 33af, turning on the second switch 33ad.

[0049] The first switch 33aa controls the flow of current to the first coil 32bb, and the second switch 33ab controls the flow of current to the second coil 32cb. Specifically, when the switch is turned on, the flow of current to the coil is permitted, and when the switch is turned off, the flow of current to the coil is prohibited.

[0050] The state in which current is permitted to flow to the coil is a state in which current can be passed through the coil when the board 33b of the switch unit 33 or the relay unit of the switching unit 32 receives a current-passing signal to the coil, and the state in which current is prohibited to flow through the coil is a state in which current cannot be passed through the coil even when the board 33b of the switch unit 33 or the relay unit of the switching unit 32 receives a current-passing signal to the coil.

[0051] Here, we will explain the case where the first switch 33aa is turned on and the second switch 33ab is turned off. Because the second switch 33ab is turned off, no current is passed through the second coil 32cb, but the first switch 33aa is turned on. Therefore, when the circuit board 33b of the switch unit 33 or the first relay unit 32d receives a signal to energize the first coil 32bb, current is passed through the first coil 32bb. As a result, the first movable iron core 32ba, the connecting member 32ac, and the operating pin 32aa move toward the first power source, causing the operating pin 32aa to press the first cam 33ac. As a result, the first switch 33aa is turned off and enters a current-disabled state. At this time, current continues to pass through the first coil 32bb until the first switch 33aa is turned off. Of course, this series of actions occurs instantaneously, so the time it takes for the coil to be energized is short.

[0052] Next, the energization signal to the coil will be described. The energization signal to the coil, which is sent to the board 33b of the switch unit 33 or the relay unit of the switching unit 32, is generated based on the presence or absence of energization from the first power source or the second power source, and on time control. The case where the energization signal to the coil is generated based on time control refers to, for example, a case where an energization signal to the second coil 32cb is sent to the board 33b of the switch unit 33 or the second relay unit 32e at a predetermined time, regardless of the presence or absence of energization from the first power source. Based on the energization signal generated in this way, switching from the first power source to the second power source can be performed.

[0053] Next, specific operation will be explained. In the following description, when explaining whether or not power is being supplied from the first power source or the second power source, the first power source is a commercial power source and the second power source is a distributed power source. Furthermore, the first power source, which is a commercial power source, is assumed to have priority over the second power source, which is a distributed power source. In other words, when power is being supplied from the first power source, the first power source is used, and when power is not being supplied from the first power source, the second power source is used.

[0054] When there is current from the first power source, the operation pin 32aa is located on the first power source side, so the first switch 33aa is off and the second switch 33ab is on. If a power outage occurs in the first power source, the board 33b of the switch unit 33 or the second relay unit 32e detects the power outage and checks whether there is current from the second power source. If there is no current from the second power source, the state of the control unit 30 is maintained. If there is current from the second power source, it determines that a current-carrying signal for the second coil 32cb has been received, and current is applied to the second coil 32cb. As a result, the operation pin 32aa moves toward the second power source, and the first switch 33aa is on and the second switch 33ab is off.

[0055] Thereafter, when the first power supply is restored, the substrate 33b of the switch unit 33 or the first relay unit 32d detects the restoration of the first power supply, determines that it has received a signal to energize the first coil 32bb, and energizes the first coil 32bb. As a result, the operation pin 32aa moves toward the first power supply, the first switch 33aa is turned off, and the second switch 33ab is turned on.

[0056] Here, the cover 38 will be described. The cover 38 of this embodiment has bearing portions 38a at both longitudinal ends that receive shafts provided on the second case 31b of the control unit 30, an engagement portion 38b at one lateral end that engages with the first case 31a of the control unit 30, and a cover-side abutment portion 38c at the other end (see FIGS. 18 and 19). The cover-side abutment portion 38c has a cover-side inclined surface 38ca formed on the surface facing the engagement portion 38b, and a cover-side abutment surface 38cb formed on the surface facing the longitudinal end.

[0057] Therefore, cover 38 can be opened by rotating it around the axis received in bearing 38a after disengaging engaging portion 38b from case member 31. Cover 38 can also be closed by rotating it in the opposite direction and engaging engaging portion 38b with case member 31.

[0058] The first cam 33ac in this embodiment includes a bearing portion 33ac1 that receives a shaft provided on the base 33ag, a pressing portion 33ac2 that presses the first switch 33aa, a spring mounting portion 33ac3 to which the spring 33ae is attached, and a cam-side abutment portion 33ac4 at its upper end. The cam-side abutment portion 33ac4 also includes a cam-side abutment surface 33ac5 and a cam-side inclined surface 33ac6 (see FIGS. 20 and 21).

[0059] Similarly, the second cam 33ad of the embodiment has a bearing portion 33ad1 that receives a shaft provided on the base 33ag, a pressing portion 33ad2 that presses the second switch 33ab, a spring mounting portion 33ad3 to which the spring 33af is attached, and a cam-side abutment portion 33ad4 at its upper end. The cam-side abutment portion also has a cam-side abutment surface and a cam-side inclined surface.

[0060] In this embodiment, by rotating the cover 38, the cover-side contact portion and the cam-side contact portion come into contact with each other, and the cam rotates due to the force applied from the cover-side contact portion to the cam-side contact portion (see FIGS. 22 and 23). Therefore, when the cover 38 comes into contact with the cam that turns the switch on, the cam rotates, and the switch can be changed to the off state.

[0061] More specifically, opening the cover 38 changes one switch from on to off, and the other switch is set to the off state by the operating pin 32aa, so both switches are in the off state. In other words, because both the first switch 33aa and the second switch 33ab prohibit the passage of current to the coil, no current is passed through the coil. Therefore, even if the handle 81 is attached to the handle attachment portion 42 with the cover 38 open and the switch is manually switched, no current is passed through the coil, which reduces the risk of the coil burning.

[0062] Next, the movement of the cover 38 and the cam will be described. As can be seen from FIG. 22, when the cover 38 is closed, the cam is located between the engagement portion 38b of the cover 38 and the cover-side abutment portion 38c. When the cover 38 is opened (the cover 38 rotates about the axis supported by the bearing portion 38a), the cover-side inclined surface 38ca and the cam-side inclined surface come into contact. When the cover 38 is opened further, the cover-side inclined surface 38ca presses the cam-side inclined surface, and the cam rotates about the bearing portion in a direction that turns the switch off. At this time, opening the cover 38 to a certain extent turns the switch off.

[0063] After the cover 38 is opened until the cover-side inclined surface 38ca and the cam-side inclined surface no longer come into contact with each other, the cover-side contact surface 38cb and the cam-side contact surface come into contact with each other. By keeping the cover 38 open, the switch can also be kept in the off state.

[0064] Conversely, when the cover 38 is closed, the cam is urged by the spring to rotate in the direction that turns on the switch. As a result of this rotation, the cam turns on the switch.

[0065] As can be understood from these descriptions, the diverter switchgear 1 includes a main circuit unit 10 capable of switching the power source for supplying power to the load equipment between a first power source and a second power source, and a control unit 30 that controls the switching of the power source for supplying power to the load equipment, and the main circuit unit 10 preferably includes a first power source side terminal portion 11 connectable to the first power source, a second power source side terminal portion 12 connectable to the second power source, and a load side terminal portion 13 connectable to the load equipment, and the control unit 30 preferably includes a solenoid that enables switching of the power source by passing current through the coil, and a cover 38 that can be opened or closed to switch between a state in which current is permitted to pass through the coil and a state in which current is prohibited to pass through the coil. In this way, it is possible to provide a diverter switchgear 1 that can prohibit current from passing through the coil by opening the cover 38 provided on the control unit 30.

[0066] In addition, it is preferable that the control unit 30 be configured so that it can switch between a state in which current is permitted to flow to the coil and a state in which current is prohibited to flow to the coil by switching the switch between on and off states through the opening and closing operation of the cover 38.

[0067] It is preferable that the control unit 30 is provided with a cam that can be linked to the opening and closing operation of the cover 38, so that the cam can be moved away from the switch by opening the cover 38, and the cam can press the switch by closing the cover 38.

[0068] The changeover switchgear 1 of the embodiment is attached to an electrical and electronic equipment storage box 9 (see FIG. 24). The electrical and electronic equipment storage box 9 is used to store electrical and electronic equipment such as circuit breakers, switches 14, transformers, relays, communication devices, measuring devices, control devices, sensor devices, air conditioners, and servers in a box body, and refers to, for example, a distribution board, a switchboard, a control panel, high-voltage power receiving equipment (including cubicle-type high-voltage power receiving equipment), a system rack, etc. In FIG. 24, the changeover switchgear 1 is attached inside the distribution board.

[0069] Although the present invention has been described above using the embodiments as examples, the present invention is not limited to the above embodiments and can be embodied in various forms. For example, It is also possible. [Explanation of symbols]

[0070] 1. Switchgear 9. Electrical and electronic equipment storage boxes 10 Main circuit unit 11 First power supply side terminal section 12 Second power supply side terminal section 13 Load side terminal 13d Rotating member 14 Switchgear 30 Control Unit 31 Case material 37 holes 41 Shaft 42 Handle attachment part 81 Handle

Claims

1. A switching switchgear including a main circuit unit capable of switching a power source for supplying power to a load device between a first power source and a second power source, and a control unit for controlling the switching of the power source for supplying power to the load device, the main circuit unit includes a first power source side terminal portion connectable to a first power source, a second power source side terminal portion connectable to a second power source, and a load side terminal portion connectable to a load device; The control unit is provided with a handle attachment portion for attaching a handle that can be attached and detached to enable manual switching of power; The switching opening and closing device has a hole on the front side of the case member of the control unit into which the handle can be inserted from the front side when the handle is attached to the handle attachment portion.

2. 2. The switch opening and closing device according to claim 1, further comprising a handle support portion on a side surface of the control unit, the handle support portion being capable of supporting a handle separated from the handle attachment portion.

3. the load-side terminal portion includes a rotating member that rotates to switch the power source for supplying power to the load device between the first power source and the second power source; The control unit includes a shaft that engages with the rotating member, a handle attachment portion on the shaft; When a handle is attached to the handle attachment section, by moving the handle, the shaft and the rotating member are linked together, making it possible to switch the power supply, 3. The switching opening and closing device according to claim 1 or 2, wherein when a handle is not attached to the handle attachment portion, the shaft is moved by an electrical force generated by a control unit, and the shaft and the rotating member are linked to switch the power source.

4. the main circuit unit includes a plurality of switches each having a first power supply side terminal portion, a second power supply side terminal portion, and a load side terminal portion; The rotary members of each switch are connected in a fitted state, 4. The changeover switchgear according to claim 1, wherein the switches are capable of operating in conjunction with each other when switching the power source.

5. A box for storing electric and electronic equipment, comprising the changeover switch device according to any one of claims 1 to 4.

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