JP7742787B2 - Switching devices and electrical and electronic equipment storage boxes - Google Patents

Description

The present invention relates to a switching device that switches between a first power source and a second power source as the power source for supplying power to a load device, and to a box for storing electrical and electronic equipment.

As described in Patent Document 1, a changeover switch 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. As described in Patent Document 1, this changeover switch uses a solenoid to switch between them. For example, when current is applied to the solenoid coil, the plunger is pulled toward the inside of the coil, which in turn causes the crossbar to move in tandem and switch between them. Meanwhile, as described in Patent Document 2, a changeover switch is known that allows manual switching using a handle.

Japanese Patent Application Laid-Open No. 2009-272077 Japanese Patent Application Laid-Open No. 2017-123296

Under normal circumstances, the coil is only energized for a short time when switching. However, if manual switching is performed using the handle while the coil is energized, there is a possibility that the coil will remain energized for a long period of time. In this case, there is a risk that the coil will burn out.

The inventors of this invention have thoroughly investigated this issue and attempted to find a solution. The problem that this invention aims to solve is to provide a changeover switchgear that can prohibit the flow of electricity to the coil by opening a cover attached to the control unit.

To solve the above problem, a switching device is provided that includes a main circuit unit that can switch the power source supplied to the load equipment between a first power source and a second power source, and a control unit that controls the switching of the power source supplied to the load equipment. The main circuit unit includes a first power source terminal unit that can be connected to the first power source, a second power source terminal unit that can be connected to the second power source, and a load-side terminal unit that can be connected to the load equipment. The control unit includes a solenoid that enables the power source to be switched by passing current through the coil, and a cover that can be opened or closed to switch between a state in which current is allowed to flow through the coil and a state in which current is prohibited from flowing through the coil.

It is also preferable that the control unit be configured so that opening and closing the cover switches the switch between on and off, thereby switching between a state in which current is permitted to flow through the coil and a state in which current is prohibited from flowing through the coil.

It is also preferable that the control unit be equipped with a cam that can be linked to the opening and closing of the cover, so that the cam can be moved away from the switch by opening the cover, and the cam can press the switch by closing the cover.

It is also preferable that the case member of the control unit has a handle attachment section to which a handle can be attached when manually switching the power supply to the load device, the case member has a hole that allows access to the handle attachment section, and the cover is configured to be able to cover the hole that allows access to the handle attachment section.

It is also preferable that the above-described switching device is provided in a box for storing electrical and electronic equipment.

This invention makes it possible to provide a switching device that can prohibit the flow of electricity to the coil by opening a cover attached to the control unit.

FIG. 1 is a perspective view of a changeover switching device according to an embodiment. 2 is a front view of the changeover switchgear shown in FIG. 1, with the terminal cover omitted. FIG. 2 is an exploded perspective view of the main circuit unit according to the embodiment. 1 is a side view of a main circuit unit according to an embodiment, with a part of the case separated. 10A and 10B are diagrams showing states before and after the pivoting member and its shaft are connected. FIG. 2 is an exploded perspective view of the changeover switch device according to the embodiment. FIG. 7 is an exploded perspective view of the changeover switchgear shown in FIG. 6 with the second case removed. FIG. 8 is an exploded perspective view of the changeover switchgear shown in FIG. 7 with a second case and a switch unit removed. FIG. 9 is an exploded perspective view of the switching unit shown in FIG. 8 . FIG. 10 is an exploded perspective view of the switching portion shown in FIG. 9 . 10A and 10B are diagrams illustrating an example of the movement of the switching unit according to the embodiment. 1. FIG. 5 is a diagram showing a modified example of the switch opening/closing device in which a handle support portion different from that in FIG. 1 is a diagram showing a state in which a handle is attached to the switching opening and closing device of the embodiment. FIG. 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. 15 is a diagram showing the handle being rotated to switch the power source in the switching device shown in FIG. 14 . FIG. FIG. 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. FIG. 2 is a perspective view of a cover of the switching device according to the embodiment. FIG. 19 is a perspective view of the cover shown in FIG. 18 as seen from the opposite side. FIG. 2 is a perspective view of a first cam in the embodiment. FIG. 21 is a perspective view of the first cam shown in FIG. 20 as viewed from a different angle. 10A and 10B are diagrams illustrating an example of cam movement when the cover is opened and closed. 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. FIG. 10 is a diagram showing an example in which a switching switchgear is installed in a distribution board.

The following describes an embodiment of the invention. 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 this 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 other event. Therefore, as can be seen from Figures 1 to 4, the diverter switchgear 1 of this 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.

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 a first power source side terminal 11 on one side to which a first power source, such as a commercial power source, is connected, a second power source side terminal 12 on the other side to which a second power source, such as a distributed power source, is connected, and a load side terminal 13 to which a load device is connected. 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 with them. Examples of distributed power sources include those that utilize renewable energy sources such as solar power generation and wind power generation, as well as fuel cells and storage batteries.

The main circuit unit 10 of this embodiment is also provided with a switch 14, which houses the first power supply side terminal portion 11, the second power supply side terminal portion 12, and the load side terminal portion 13 in a case. It is sufficient to connect as many switches 14 as necessary for the number of poles, but in the example shown in Figures 1 to 3, three switches 14 are connected, forming a three-pole main circuit unit 10.

As can be seen from FIG. 4, the first power supply 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 terminal 11b. Similarly, the second power supply side terminal portion 12 also includes a terminal 12b having a contact 12a and a terminal screw 12c for connecting an electric wire to 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 contacts the contact 11a of the first power supply side terminal portion 11 or the contact 12a of the second power supply side terminal portion 12, a terminal 13b electrically connected to contactor 13e via an electrical circuit member, and a terminal screw 13c for connecting an electric wire to terminal 13b.

When switching the power source for supplying power to the load device between the first power source and the second power source, the rotating member 13d is rotated to rotate the contactor 13e. In this way, the contact point of the contact 13a of the contactor 13e is switched between the contact 11a of the first power source terminal portion 11 and the contact 12a of the second power source terminal portion 12, and the source of power supplied to the load device is switched between the first power source and the second power source.

In this embodiment, the case 14a forming the outer shell of the switch 14 has an opening 14b that exposes the connection portion 13f of the rotating member 13d, and the switches 14 are connected to each other by the connection portion 13f exposed from the opening 14b (see Figure 3). In this embodiment, a concave connection portion 13f is provided on one side of the rotating member 13d, and a convex connection portion 13f is provided on the other side. The concave connection portion 13f of the rotating member 13d of one switch 14 is fitted with the convex connection portion 13f of the rotating member 13d of another switch 14, and a connecting pin 15 is inserted through the axial hole of the rotating member 13d, connecting the multiple switches 14 so that they move together (see Figure 5).

The rotating member 13d of the switch 14 adjacent to the control unit 30 has a recessed connection portion 13f on its side that fits into the shaft 41 of the control unit 30, allowing the rotating member 13d to rotate in conjunction with the shaft 41. In other words, the rotating member 13d rotates in conjunction with changes 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 supply side terminal portion 11 and the contact 12a of the second power supply side terminal portion 12.

As can be seen from the above, the main circuit unit 10 preferably comprises 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, with the rotating members 13d of each switch 14 connected in a fitted state, allowing the switches 14 to move in tandem when switching power sources. This makes it easy to connect the rotating members 13d to each other, and also makes it easy to connect the switches 14. Furthermore, if multiple similar switches 14 are prepared and connected, the number of parts can be reduced.

Furthermore, the load side terminal portion 13 is provided with a rotating member 13d that rotates to switch the power source supplied to the load device between the first power source and the second power source, and the control unit 30 is preferably configured to have a shaft 41 that engages with the rotating member 13d, and a handle attachment portion 42 on the shaft 41. In this way, the shaft 41 having the handle attachment portion 42 engages with the rotating member 13d and moves in conjunction with it, making it possible to switch the power source.

Furthermore, when the handle 81 is attached to the handle attachment portion 42, moving the handle 81 allows the shaft 41 and the rotating member 13d to work together to switch the power supply; and when the handle 81 is not attached to the handle attachment portion 42, it is preferable to move the shaft 41 with an electrical force generated by the control unit 30, allowing the shaft 41 and the rotating member 13d to work together to switch the power supply. In this way, the shaft 41 can be moved whether for electrical operation or manual operation, thereby reducing the number of parts.

The control unit 30 will now be described in detail. The control unit 30 is connected to the main circuit unit 10 and is connected to the side of the main circuit unit 10. This control unit 30 can control the switching of the power source to the load side terminal section 13 of the main circuit unit 10 between the first power source and the second power source.

The control unit 30 of this embodiment has a main outer shell formed by a case member 31. The case member 31 of this embodiment is box-shaped and made up of a first case 31a and a second case 31b, and houses a switching unit 32 and a switch unit 33 (see Figures 6 to 8). In this embodiment, the main circuit unit 10 and the control unit 30 are fixed together by fastening the first case 31a of the control unit 30 to the switch 14 adjacent to the first case 31a with screws or the like. At this time, the switches 14 are also fixed together by using screws that pass through all of the switches 14 that make up the main circuit unit 10 and the first case 31a.

In this 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).

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

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 positioned so that it protrudes from the end of the coil opposite the end where the fixed core is provided.

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 the switch unit 33 described below, control the flow of electricity to the solenoid coil.

Here, we will explain an example of switching using the control unit 30. However, we will explain 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 operational flow is similar when switching from the first power source to the second power source, so we will not explain that example again.

First, an example of electrical switching will be described. When switching using electricity, 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 Figure 11).

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 changes. This change in the angle of the switching member 32ad changes the angle of the shaft 41 connected to the switching member 32ad. Changing the angle of the shaft 41 rotates the rotating member 13d of the switch 14 fitted to the shaft 41. Rotating the rotating member 13d causes the contact 13a of the load side terminal 13, which contacts the contact 12a of the second power source side terminal 12, to contact the contact 11a of the first power source side terminal 11. Changing the angle of the shaft 41 also changes the angle of the indicator member 32ae, which is connected to the shaft 41. Changing the angle of the indicator member 32ae indicates that the load side terminal 13 is connected to the first power source side terminal 11.

Next, an example of manual switching will be described. Manual switching is performed using a handle 81 that can be attached to the switching switch device 1. The shaft 41 has a handle attachment portion 42 at the end opposite the end where the switch 14 is fitted.

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. Changing the angle of the shaft 41 rotates the rotating member 13d of the switch 14 fitted to the shaft 41. Rotating the rotating member 13d causes the contact 13a of the load side terminal portion 13, which contacts the contact 12a of the second power source side terminal portion 12, to contact the contact 11a of the first power source side terminal portion 11. Note that changing the angle of the shaft 41 also changes the angle of the indicator member 32ae, which is connected to the shaft 41. As in the example above, changing the angle of the indicator member 32ae can indicate that the load side terminal portion 13 is connected to the first power source side terminal portion 11. When the work is completed, the handle 81 can be removed from the handle attachment portion 42.

By providing a handle support portion on the side of the control unit 30 that can support the handle 81 when it is separated from the handle attachment portion 42, it is possible to prevent the handle 81 from being lost when it is removed from the handle attachment portion 42.

In Figure 1, a protrusion 35 on the side of the control unit 30 serves as the handle support. In this case, a hole is provided in the handle 81, and by inserting the protrusion 35 into the hole, the handle 81 can be supported on the side of the control unit 30. In the example shown in Figure 1, two holes are provided at intervals along the length of the handle 81, and the protrusions 35 are formed to correspond to these holes. By making the handle support a protrusion, it is possible to prevent the handle 81 from falling off the handle support even if vibrations are applied or the orientation is changed, such as when transporting the switcher switching device 1.

The handle support portion may have other configurations. In the example shown in Figure 1, two protrusions 35 are provided as the handle support portion to prevent rotation of the handle 81 supported by the handle support portion, 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.

For example, a protrusion corresponding to a hole in the handle 81 for insertion into the handle attachment portion 42 is provided on the control unit 30. In this case, if the front side is installed facing up and the installation surface side facing down, 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 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.

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

In the example shown in Figure 12, a handle support portion is formed by providing a receptacle portion 36 shaped like a cutout on part 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. Note that part of the front side is left as a surface because the changeover switching device 1 may be installed with the first power source side facing up and the second power source side and load side facing down. In such cases, 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 a handle support portion, the handle can be supported simply by storing the handle in the storage space. This makes it easy to insert and remove the handle 81 from the handle support portion.

As can be seen from the example shown in FIG. 1, in this embodiment, the control unit 30 is provided with a handle attachment section 42 that allows for manual power switching by attaching a removable handle 81 to the control unit 30, making it easy to manually switch the power source to the load equipment 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). Therefore, when manually switching the power source, the handle 81 can be attached from the front side of the switching switch device 1. In this embodiment, manually switching between the first power source and the second power source can be performed by attaching the handle 81 to the handle attachment section 42 and then moving the handle 81 to change its angle relative to the switching switch device 1 (see FIG. 15).

However, rather than leaving the handle mounting portion 42 exposed at all times, it is preferable to provide the switch switch device 1 with a cover 38 that can cover the handle mounting portion 42. This makes it possible to prevent dust from accumulating on the handle mounting portion 42 and to prevent unnecessary installation and operation of the handle 81.

Furthermore, if the case member 31 of the control unit 30 is provided with a handle attachment section 42 to which a handle 81 is 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.

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 portion of the front side of the second case 31b of the control unit 30 is cut out to create a hole 37 in the case member 31, allowing access to the handle attachment portion 42 located inside the case member 31. In addition, a cover 38 that can be opened and closed is provided on a portion of the second case 31b and can cover the hole 37 provided in the case member 31. Opening the cover 38 allows access to the handle attachment portion 42, and closing the cover 38 covers the hole 37 that provides access to the handle attachment portion 42.

Of course, a portion of the first case 31a of the control unit 30 may be cut out and covered with the cover 38. Alternatively, by providing cutouts in both the first case 31a and the second case 31b of the control unit 30, the hole 37 extending between the first case 31a and the second case 31b may be covered with the cover 38.

In addition, if a hole 37 that allows access to the handle mounting portion 42 is provided on the side of the switching 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.

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 flow of electricity to the solenoid coil. The switch unit 33 is housed and protected in the case member 31 of the control unit 30.

The switch unit 33 preferably includes at least a switch section 33a and two boards 33b (see FIG. 7). The switch section 33a preferably includes at least a first switch 33aaa and a second switch 33abb 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 these components (see FIG. 16). In this embodiment, the base 33ag is provided with a first opening 33ag1 through which the shaft 41 is inserted and a second opening 33ag2 through which the operating pin 32aa is inserted.

Here, we will explain the relationship between the operating pin 32aa and the switch unit 33. By moving the operating pin 32aa, which is inserted through the second opening 33ag2 provided in the base 33ag of the switch unit 33, its end can be brought into contact with the first cam 33ac or the second cam 33ad (see Figure 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, causing the operating pin 32aa to also move toward the first power source. The end of the operating pin 32aa comes into contact with the first cam 33ac, pushing it toward the first power source. The first cam 33ac, pushed toward the first power source by the operating pin 32aa, rotates around its axis, turning off the first switch 33aa. This state continues until the operating pin 32aa moves toward the second power source. Furthermore, as the operating pin 32aa moves toward the first power source, the contact between the operating 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.

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.

The coil energization permitted state is a state in which current can be applied to the coil when the circuit board 33b of the switch unit 33 or the relay unit of the switching unit 32 receives a signal to energize the coil. The coil energization prohibited state is a state in which current cannot be applied to the coil even when the circuit board 33b of the switch unit 33 or the relay unit of the switching unit 32 receives a signal to energize the coil.

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 pass current to 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 the first switch 33aa enters a current-prohibited 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 current to pass through the coil is short.

Next, the coil energization signal will be explained. The coil energization signal sent to the circuit board 33b of the switch unit 33 or the relay unit of the switching unit 32 is generated based on whether or not there is current from the first power source or the second power source, and by time control. A case in which the coil energization signal is generated based on time control refers, for example, to a case in which a signal to energize the second coil 32cb is sent to the circuit board 33b of the switch unit 33 or the second relay unit 32e at a predetermined time, regardless of whether or not there is current from the first power source. Switching from the first power source to the second power source can be performed based on the energization signal generated in this way.

Next, we will explain the specific operation. In the following description, when explaining whether or not power is being supplied from the first or second power source, the first power source will be referred to as a commercial power source and the second power source as a distributed power source. Furthermore, the first power source, which is a commercial power source, will take 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 will be used, and when power is not being supplied from the first power source, the second power source will be used.

When current is flowing from the first power source, the operating pin 32aa is positioned 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 circuit board 33b of the switch unit 33 or the second relay unit 32e detects the power outage and checks whether current is flowing from the second power source. If current is not flowing from the second power source, the state of the control unit 30 is maintained. If current is flowing from the second power source, it determines that a current flow signal for the second coil 32cb has been received, and current is applied to the second coil 32cb. As a result, the operating pin 32aa moves toward the second power source, and the first switch 33aa is turned on and the second switch 33ab is turned off.

When the first power supply is subsequently restored, the circuit board 33b of the switch unit 33 or the first relay unit 32d detects this and determines that it has received a signal to energize the first coil 32bb, causing the first coil 32bb to be energized. As a result, the operating pin 32aa moves toward the first power supply, turning the first switch 33aa off and the second switch 33ab on.

Now, the cover 38 will be described. In this embodiment, the cover 38 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 Figures 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.

As a result, the cover 38 can be opened by disengaging the case member 31 from the engaging portion 38b and then rotating it around the axis received in the bearing portion 38a. The cover 38 can also be closed by rotating it in the opposite direction and engaging the engaging portion 38b with the case member 31.

In addition, the first cam 33ac in this embodiment has 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 has a cam-side abutment surface 33ac5 and a cam-side inclined surface 33ac6 (see Figures 20 and 21).

Similarly, the second cam 33ad in this 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.

In this embodiment, rotating the cover 38 causes the cover-side contact portion and the cam-side contact portion to come into contact, and the force applied from the cover-side contact portion to the cam-side contact portion causes the cam to rotate (see Figures 22 and 23). Therefore, when the cover 38 comes into contact with the cam that turns the switch on, the cam rotates, changing the switch to the off state.

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 off. In other words, because both the first switch 33aa and the second switch 33ab prohibit current from flowing 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, reducing the risk of the coil burning out.

Next, the movement of the cover 38 and cam will be explained. As can be seen from Figure 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 around 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 against the cam-side inclined surface, and the cam rotates around 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.

After the cover 38 is opened until the cover-side inclined surface 38ca no longer abuts against the cam-side inclined surface, the cover-side abutment surface 38cb abuts against the cam-side abutment surface. By keeping the cover 38 open, the switch can also be kept in the off state.

Conversely, when cover 38 is closed, the spring biases the cam, causing it to rotate in the direction that turns the switch on. As a result of this rotation, the cam turns the switch on.

As can be seen from these descriptions, the diverter switchgear 1 includes a main circuit unit 10 that can switch 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. The main circuit unit 10 preferably includes a first power source side terminal unit 11 that can be connected to the first power source, a second power source side terminal unit 12 that can be connected to the second power source, and a load side terminal unit 13 that can be connected to the load equipment. The control unit 30 preferably includes a solenoid that enables power source switching by energizing the coil, and a cover 38 that can be opened or closed to switch between a state in which energization to the coil is permitted and a state in which energization to the coil is prohibited. In this way, it is possible to provide a diverter switchgear 1 that can prohibit energization to the coil by opening the cover 38 provided on the control unit 30.

Furthermore, it is preferable that the control unit 30 be configured so that opening and closing the cover 38 switches the switch between on and off, thereby switching 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.

It is preferable that the control unit 30 be equipped with a cam that can be linked to the opening and closing 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.

The switching device 1 of this embodiment is attached to an electrical/electronic equipment storage box 9 (see Figure 24). The electrical/electronic equipment storage box 9 is used to store electrical/electronic equipment such as circuit breakers, switches 14, transformers, relays, communication devices, measuring devices, control devices, sensor devices, air conditioning equipment, and servers in the box body, and may refer to, for example, a distribution board, switchboard, control panel, high-voltage power receiving equipment (including cubicle-type high-voltage power receiving equipment), system rack, etc. In Figure 24, the switching device 1 is attached inside the distribution board.

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.

REFERENCE SIGNS LIST 1 Switching device 9 Electrical and electronic equipment storage box 10 Main circuit unit 11 First power supply side terminal portion 12 Second power supply side terminal portion 13 Load side terminal portion 13d Rotating member 14 Switch 30 Control unit 31 Case member 37 Hole 41 Shaft 42 Handle mounting portion 81 Handle

Claims (5)

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 supply terminal portion connectable to a first power supply, a second power supply terminal portion connectable to a second power supply, and a load side terminal portion connectable to a load device;
The control unit is a switching switch device equipped with a solenoid that enables switching of the power supply by passing current through the coil, and a cover that can be opened and closed to switch between a state in which current is permitted to flow through the coil and a state in which current is prohibited to flow through the coil. The switching device of claim 1, wherein the control unit switches the switch between on and off states by opening and closing the cover, thereby switching 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. The control unit
Equipped with a cam that can be linked to the opening and closing of the cover,
3. The switching device according to claim 2, wherein the cam can be moved away from the switch by opening the cover, and the cam can press the switch by closing the cover. A handle mounting portion is provided in the case member of the control unit to which a handle can be attached when manually switching the power supply to the load device,
The case member has a hole that allows access to the handle attachment portion,
4. The switchgear according to claim 1, wherein the cover is capable of covering a hole that allows access to the handle attachment portion. A box for storing electrical and electronic equipment equipped with a switching device according to any one of claims 1 to 4.