JP3940349B2 - Power supply switchgear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply switching apparatus that opens and closes a wiring for supplying power from a supply side to a demand side.
[0002]
[Prior art]
In general, a watt-hour meter for measuring power consumption on the demand side is interposed between the power supply side lead-in line and the demand side wiring. When power supply is stopped due to non-payment of charges, the service line is removed from the watt-hour meter, and the service line is connected to the power meter again when power supply is resumed. Since the removal and connection of the lead-in wires are performed in a live line state, there is a risk of electric shock and is troublesome, and the work requires skill.
[0003]
On the other hand, Patent Document 1 discloses a power supply switching device that is installed between a watt-hour meter and a service line or a demand-side wiring to switch power supply stop and release. 10 and 11 show a power supply switching device disclosed in Patent Document 1. FIG.
[0004]
The power supply switching device shown in FIG. 10 includes a device main body 101 and a conductive plug 102 that is detachably attached to the device main body 101. The apparatus main body 101 and the watt hour meter 103 are connected via a lead wire 104 attached to the apparatus main body 101 with a screw (not shown). The lead-in wire or the demand-side wiring 105 is attached to the apparatus main body 101 with a screw 106.
[0005]
The conductive plug 102 is attached to the apparatus main body 101 to connect the lead wire 104 and the wiring 105. By attaching and detaching the conductive plug 102 to the apparatus main body 101, the power supply is stopped and released.
[0006]
In addition, the power supply opening / closing device shown in FIG. 11 includes a remote control stop / release device 107, and is configured to switch between power supply stop and release by opening and closing the switch 108 by remote operation.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-98716 (paragraph numbers 0006 to 0011, paragraph number 0016, FIGS. 4 and 8)
[0008]
[Problems to be solved by the invention]
However, among the power supply switchgears described above, those that attach and detach the conductive plug have exposed screws and other parts (charging parts) for attaching lead wires and wirings, so that inadvertently touching consumers and workers can be electrocuted. There is a risk. On the other hand, a device equipped with a remote control stop canceling device is safe because it can open and close the switch by remote operation, but it is expensive and requires a large installation space.
[0009]
An object of the present invention is to provide a small and inexpensive power supply switching apparatus that can be safely opened and closed.
[0010]
[Means for Solving the Problems]
In view of the above-described problems, the present invention includes a supply-side terminal for connecting a supply-side wiring and a demand-side terminal for connecting a demand-side wiring in the switchgear body, between the supply-side terminal and the demand-side terminal. On the premise of a structure that opens and closes the wiring for supplying power from the supply side to the demand side by providing switching means for switching between one of the conduction state and the non-conduction state, the electrical conduction portion of the switchgear body is It is an object of the present invention to provide a power supply opening / closing device provided with an insulating lid that is covered so as not to be exposed to the outside. According to this configuration, since the electrically conductive portion is covered with the insulating lid, it is possible to prevent a user or worker from inadvertently touching and receiving an electric shock.
[0011]
Examples of the switching means include those composed of a conductor or an insulator. When the switching means is composed of a conductor, a predetermined gap is provided between the terminals so that the supply side terminal and the demand side terminal are connected or disconnected by the conductor. When switching between both terminals to the conductive state, insert the conductor into the gap and connect between both terminals, and when switching between the two terminals to the non-conductive state, pull the conductor out of the gap and disconnect the connection between both terminals To do.
[0012]
When the switching means is composed of an insulator, energize at least one of the two terminals toward the other terminal so that the supply side terminal and the demand side terminal are connected or disconnected by the insulator. Biasing means for bringing both terminals into contact is provided. When switching between both terminals to the conductive state, pull out the insulator from between both terminals to connect between both terminals, and when switching between both terminals to the non-conductive state, the insulator is resisted against the biasing force of the biasing means. Insert between both terminals to cut the connection between both terminals. Examples of the urging means include an elastic body made of rubber or a spring.
[0013]
The switching means may be separate from the other members, but may be provided integrally with the lid. At this time, two types of lids are provided as the lid, and switching means (conductor or insulator) is provided in any lid, and switching means is not provided in the remaining lids. By switching one lid attached to the switchgear body to the other lid, the terminals are switched to one of a conductive state and a non-conductive state. By doing so, it is only necessary to attach and detach the lid for covering the electrically conductive portion, so that switching between the conductive state and the non-conductive state between both terminals can be simplified.
[0014]
Further, the switching means may be composed of a conductor and an insulator. In this case, when switching between both terminals to the conductive state, a conductor is inserted between both terminals to connect between both terminals, and when switching between both terminals to the non-conductive state, an insulator is inserted between both terminals. Disconnect the connection between both terminals. When this switching means is provided integrally with the lid, two types of lids are provided as the lid, a conductor is provided on one of the lids, and an insulator is provided on the other lid. By replacing one lid attached to the switchgear main body with the other lid, the terminals may be switched to one of a conductive state and a non-conductive state.
[0015]
When the switching means is provided on the lid, by changing the mounting direction of the lid on the switchgear body, the switching means is inserted between the terminals or pulled out from both terminals, and the terminals are turned on and off. You may make it switch to one of these. This is preferable because it is not necessary to prepare a plurality of lids.
[0016]
Specifically, a configuration in which the gap between both terminals and the switching means are eccentric from the center of the lid can be exemplified. In other words, the conductor (insulator) is set to be inserted between both terminals when the lid is mounted in a predetermined direction, and the conductor (insulator) is connected to both terminals by changing the mounting direction of the lid. Pull out from between. When the switching means is composed of a conductor and an insulator, the insulator (conductor) is inserted in place of the drawn conductor (insulator) by changing the mounting direction of the lid. That's fine.
[0017]
As another switching means, an electrical contact for connecting or disconnecting both terminals, a switch connected to the electrical contact, and a protrusion formed on the lid so as to press the switch may be provided. Specifically, the supply-side terminal and the demand-side terminal are arranged at a predetermined interval, and the switch is connected to connect both terminals with electrical contacts, and the electrical contact disconnects between the two terminals. It is movable between postures.
[0018]
By changing the mounting direction of the lid, the protrusions are pressed against different parts of the switch, the switch is switched between the connection posture and the disconnection posture, the electric contact is moved, and the connection between the terminals is turned on and off. Switch to one of them.
[0019]
An electrically conductive portion of the switchgear body is covered with an insulating cover so as not to be exposed to the outside, and an insertion hole for inserting the switching means is formed in this cover. After the supply side wiring and the demand side wiring are connected and the cover is mounted, the switching means is inserted into and removed from the insertion hole, thereby switching between the conductive state and the non-conductive state between the two terminals. By doing so, even when the lid is removed, the electrically conducting portions such as the supply side terminal and the demand side terminal are not exposed, so that switching between the conducting state and the non-conducting state between both terminals can be made safe. .
[0020]
The lid and cover attached to the switchgear body can be removed with a dedicated tool to prevent unauthorized operation. Specifically, the structure which attaches and fixes a cover body and a cover with the special screw which formed the trifurcated groove | channel so that the generally used plus driver and minus driver cannot be used can be illustrated. In this case, it is possible to prevent a user or a third party from removing the lid or the cover, and to prevent an electric shock or power theft by touching the electrically conductive portion.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a power supply switching apparatus according to the present invention will be described with reference to the drawings. This power supply switching device is connected in series between a watt-hour meter (not shown) and a demand-side wiring, and opens and closes a wiring for supplying power from the supply side to the demand side. Note that the power supply switching device may be connected between the watt-hour meter and the supply-side lead-in wire.
[0022]
[ reference Form] First, Reference for power switchgear A form is demonstrated. FIG. Is salary FIG. 2 is a perspective view when the lid of the power supply switchgear is removed, FIG. 3 is a perspective view showing the inside of the switchgear body, and FIG. It is a perspective view of the lid which is not provided.
[0023]
In this power supply switchgear, the switchgear main body 1, the supply-side terminal 3 that connects the supply-side wiring 2, the demand-side terminal 5 that connects the demand-side wiring 4, and the electrical conduction portion of the switchgear main body 1 are external. A cover 6 so as not to be exposed to the light, a lid 7 covering the outside of the cover 6, and a conductor for switching between the supply-side terminal 3 and the demand-side terminal 5 to one of a conductive state and a non-conductive state. 8 (switching means).
[0024]
The switchgear main body 1 is formed in a substantially box shape from, for example, an electrically insulating synthetic resin, and a supply side terminal 3 and a demand side terminal 5 are disposed therein. The supply side terminal 3 and the demand side terminal 5 are arranged so that the axes thereof are parallel to each other, and a gap 9 for inserting the conductor 8 is formed between the terminals 3 and 5. The gap 9 is set to be smaller than the thickness of the conductor 8 by urging the supply side terminal 3 toward the demand side terminal 5 with a spring (not shown).
[0025]
The supply side terminal 3 has a substantially L-shaped cross section made of a conductive material, and is arranged with its vertical piece 10 facing the demand side terminal 5. The supply-side terminal 3 is attached to the switchgear main body 1 by fixing the distal end side with a screw 12 when viewed from the supply-side wiring 2 of the horizontal portion 11. The screw 12 is gently tightened so that the supply side terminal 3 can be biased by a spring so that the gap 9 can be made smaller than the conductor 8.
[0026]
An insertion portion 14 for inserting the core wire 13 of the supply side wiring 2 is formed on the proximal end side of the horizontal portion 11 of the supply side terminal 3. Supply is performed by inserting the supply-side wiring 2 into a supply-side wiring insertion hole (not shown) formed on the supply side surface of the switchgear body 1, inserting the core wire 13 into the insertion portion 14, and crushing the insertion portion 14. The supply-side wiring 2 is connected to the side terminal 3. The supply-side wiring 2 is a multi-core wire covered with a covering portion so that it can be easily routed in a narrow space near the wattmeter.
[0027]
The demand-side terminal 5 is a substantially rectangular parallelepiped made of a conductive material, and is attached to the switchgear main body 1 by being covered with an inner lid 19 described later. The demand side terminal 5 is formed with an insertion hole 16 for inserting the core wire 15 of the demand side wiring 4 at the center of the shaft, and is screwed into the insertion hole 16 from the lid 7 side of the demand side terminal 5. The tip of the screw 17 is inserted.
[0028]
By inserting the demand side wiring 4 into the demand side wiring insertion hole 18 formed on the demand side of the switchgear body 1, inserting the core wire 15 into the insertion hole 16, and tightening the screw 17, The demand side wiring 4 is connected to the use side terminal 5. A step is formed on the inner peripheral surface of the demand side wiring insertion hole 18, and the core wire 15 of the demand side wiring 4 is opened and closed by inserting the end of the covering portion of the demand side wiring 4 up to this step. It is not exposed to the outside of the main body 1.
[0029]
The switchgear body 1 in which the supply side terminal 3 and the demand side terminal 5 are arranged has an inner lid 19 that covers the supply side terminal 3 and the demand side terminal 5 after connecting the supply side wiring 2 to the supply side terminal 3. It comes to adhere. The inner lid 19 is made of, for example, an insulating synthetic resin and is sized to fit into the switchgear body 1.
[0030]
A screw through hole 20 through which the screw 17 passes is formed in a portion of the inner lid 19 that covers the demand-side terminal 5, and the screw 17 exposed from the screw through hole 20 is operated. A conductor through hole 21 for penetrating the conductor 8 is formed in the center of the inner lid 19. The conductor through hole 21 has a size that allows the conductor 8 to be inserted.
[0031]
The cover 6 is made of, for example, an insulating synthetic resin, and is attached so as to cover the inner lid 19 with a special screw 22. By covering the screws 17 with the cover 6, all the electrically conductive portions are covered. The special screw 22 is formed with a trifurcated groove and can be removed by a dedicated tool to prevent unauthorized operation. In the center of the cover 6, a conductor insertion hole 23 for inserting the conductor 8 is formed. The conductor insertion hole 23 has the same shape as the conductor through hole 21 of the inner lid 19.
[0032]
The lid body 7 is made of, for example, an insulating synthetic resin, and is attached to the opening / closing device main body 1 so as to be fitted to the outside of the cover 6 and the inner lid 19. The lid body 7 includes a conductive cover 7 a having a conductor 8 projecting on the inside thereof and a non-conductive cover 7 b in which the conductor 8 is not provided. The conductor 8 is a plate made of a conductive material, and is set to a thickness that can be inserted into the gap 9 by expanding the gap 9 against the biasing force of a spring (not shown).
[0033]
When the lid body 7a with the conductor 8 protruding is attached, the conductor 8 penetrates the conductor insertion hole 23 of the cover 6 and the conductor through hole 21 of the inner lid, and the gap between the terminals 3 and 5 9 is inserted to switch between the terminals 3 and 5 to the conductive state. When the lid 7a is removed, the conductor 8 is pulled out from the gap 9, and the terminals 3 and 5 are switched to a non-conductive state. By selectively using the lids 7a and 7b, the conductive state and the non-conductive state between the terminals 3 and 5 are switched. The lid body 7a and the lid body 7b have the same appearance, and the power feeding state and the power feeding stop state cannot be distinguished from the outside.
[0034]
When the lid body 7 is attached to the opening / closing device body 1, the projections 24 provided on the inner side of the lid body 7 are inserted into the projection insertion holes 25 of the cover 6 and the projection insertion holes 26 of the inner lid 19. A special screw 27 is screwed onto the inner lid 19 from the outside of the side surfaces of the opening / closing device body 1 and the lid body 7 and the tip of the special screw 27 is brought into contact with the protrusion 24 of the lid body 7 so that the lid body 7 opens and closes. It is fixed to the apparatus body 1. The special screw 27 is formed with a trifurcated groove and can be removed by a dedicated tool to prevent unauthorized operation. The protrusion insertion hole 26 of the inner lid 19 has a depth that does not penetrate the inner lid 19.
[0035]
next , Salary A procedure for operating the electric switchgear will be described. First, the special screw 27 of the power supply switchgear shown in FIG. 1 is loosened with a dedicated driver, and the lid 7 is removed from the switchgear main body 1 as shown in FIG. Next, the special screw 22 is loosened with a dedicated screwdriver, and the cover 6 is rotated around the special screw 22 to expose the screw 17 as shown in FIG. Since the special screw 22 and the cover 6 are not removed, the parts can be prevented from dropping, and the workability in a narrow place is improved.
[0036]
The demand side wiring 4 is inserted into the demand side wiring insertion hole 18 of the switchgear main body 1, the core wire 15 is inserted into the insertion hole 16 of the demand side terminal 5, and the screw 17 is tightened to tighten the screw 17. The demand side wiring 4 is connected to 5. The cover 6 is adjusted to a predetermined position, and the special screw 22 is tightened and fixed. As a result, the screw 17 is covered with the cover 6 and the electrically conductive portion is not exposed. Here, the screw 17 has a length that does not protrude from the inner lid 19 in a state where the core wire 15 is firmly tightened, and the cover 6 cannot be attached when the core wire 15 is not completely connected.
[0037]
Then, the other end side of the supply side wiring 2 is attached to the secondary side terminal of the watt-hour meter, and the supply side terminal 3 is charged. At this stage, the gap 9 between the supply side terminal 3 and the demand side terminal 5 prevents power supply to the demand side wiring 4. The attachment of the power supply switchgear is completed by selecting the lids 7a and 7b and attaching them to the switchgear main body 1 depending on the case where power is supplied to the demand side and the case where power supply is stopped.
[0038]
When supplying power to the demand side, as shown in FIG. 6, the lid body 7 a provided with the conductor 8 is attached to the switchgear body 1. The mounting direction of the lid 7a is set so that the inner protrusion 24 is aligned with the protrusion insertion hole 25 of the cover 6. As a result, the conductor 8 projecting from the inside of the lid 7 a passes through the conductor insertion hole 23 of the cover 6 and the conductor through-hole 21 of the inner lid, and the gap 9 between the terminals 3 and 5. Inserted into.
[0039]
Before the cover 7a is attached, a spring (not shown) biases the supply-side terminal 3 toward the demand-side terminal 5, so that the gap 9 is smaller than the thickness of the conductor 8. By attaching the lid 7, the conductor 8 is inserted into the gap 9 while expanding the gap 9 against the urging force of the spring. Thereby, the conductor 8 contacts the supply side terminal 3 and the demand side terminal 5, and between both the terminals 3 and 5 switches to a conduction | electrical_connection state.
[0040]
When power supply to the demand side is stopped, as shown in FIG. 7, the lid body 7 b not provided with the conductor 8 is attached to the switchgear main body 1. The mounting direction of the lid 7 b is set so that the inner protrusion 24 is aligned with the protrusion insertion hole 25 of the cover 6. The gap 9 cuts between the terminals 3 and 5 and switches to a non-conductive state.
[0041]
The lid body 7 attached to the switchgear body 1 is fastened with a special screw 27 to prevent unauthorized operation. As a result, the conductor insertion hole 23 of the cover 6 and the conductor through hole 21 of the inner lid are covered, and the inside and outside of the switchgear main body 1 are blocked.
[0042]
According to the said structure, since the inside of the switchgear main body 1 is covered with the cover body 7, it can prevent that an operator or a consumer touches carelessly and receives an electric shock. By selecting and attaching the lids 7a and 7b, an opening / closing operation between the terminals 3 and 5 can be easily performed to switch between power supply stop and release thereof. Even when the lid 7 is removed for opening and closing, the cover 6 covers the electrically conductive portion, so that an electric shock to the operator can be prevented. Since the lid 7 and the cover 6 are fixed by the special screws 27 and 22, unauthorized operation by a consumer or a third party can be prevented, and theft or the like can be prevented.
[0043]
In addition, Reference for this power switchgear The form is the above Form of Is not limited to the state Suitable Changes can be made. For example, an insulator may be used as the switching means instead of the conductor 8. In this case, a spring that biases at least one of the supply-side terminal 3 and the demand-side terminal 5 toward the other terminal is provided so that the terminals 3 and 5 are brought into contact with each other.
[0044]
By mounting the lid with the insulator projecting, the insulator is inserted while spreading between the terminals 3 and 5. As a result, the terminals 3 and 5 are switched to the non-conductive state. By removing this lid, the insulator is pulled out between the terminals 3 and 5, and the terminals 3 and 5 are brought into contact with each other by the urging force of the spring to switch to the conductive state. After that, a lid that is not provided with an insulator is attached.
[0045]
As the switching means, both a conductor connecting the terminals 3 and 5 and an insulator insulating the terminals 3 and 5 may be used. By attaching the cover body provided with the conductor projecting, the conductor is inserted between the terminals 3 and 5 and the terminals 3 and 5 are switched to the conductive state. By mounting the cover body protruding from the insulator, the insulator is inserted between the terminals 3 and 5, and the terminals 3 and 5 are switched to the non-conductive state. These conductors and insulators may be separated from the lid 7 instead of protruding from the lid 7.
[0046]
Further, instead of providing two types of lids 7a and 7b, by changing the mounting direction of one type of lid 7 to the switchgear body 1, the conductive state and non-conductive state between the terminals 3 and 5 can be changed. You may make it switch.
[0047]
When a conductor or an insulator is used as the switching means, the conductor (insulator) is provided so as to be eccentric from the center of the lid 7. When the lid 7 is mounted in a predetermined direction, the conductor (insulator) is inserted between the terminals 3 and 5, and the connection between the terminals 3 and 5 is switched to the conductive state (non-conductive state). To do. When the lid body 7 is mounted in the other direction, the conductor (insulator) is shifted from between the terminals 3 and 5, and the terminals 3 and 5 are switched to a non-conductive state (conductive state).
[0048]
When a conductor and an insulator are used as the switching means, the conductor and the insulator are eccentrically provided from the center of the lid body 7 and protruded. When the lid body 7 is mounted in a predetermined direction, the conductor is inserted between the terminals 3 and 5, the connection between the terminals 3 and 5 is switched to the conductive state, and the lid body 7 is mounted in the other direction. When this is done, an insulator is inserted between the terminals 3 and 5 so that the terminals 3 and 5 are switched to a non-conductive state.
[0049]
[ Of the present invention Embodiment] Next, referring to FIG. 8 and FIG. The fruit An embodiment will be described. This The fruit The embodiment is reference The configuration is almost the same as the configuration, but instead of inserting a conductor between the supply side terminal 3 and the demand side terminal 5 or extracting the conductor from between the terminals 3 and 5, the gap between the terminals 3 and 5 is An electrical contact 31 for connection or disconnection is provided.
[0050]
The switching means for switching between the conductive state and the non-conductive state between the terminals 3 and 5 is formed in the lid 33 so as to press the switch 32 connected to the electrical contact 31, the electrical contact 31, and the switch 32. And the projection 34.
[0051]
The electrical contact 31 is formed from a conductive material in a U-shaped cross section, and is disposed between the terminals 3 and 5 with its open side facing the lid 33 side. Both terminals 3 and 5 are arranged at a predetermined interval so that the electrical contact 31 can move. Near the center between the terminals 3 and 5, an arc portion 36 of the extension fitting 35 is formed so as to protrude upward from the demand side terminal 5, and an electrical contact 31 is formed on the arc portion 36. Placed.
[0052]
The electrical contact 31 contacts the supply side terminal 3 by moving to the supply side terminal 3 side, and connects the supply side terminal 3 and the demand side terminal 5 via the extending portion 35. Further, the electrical contact 31 moves toward the demand side terminal 5 to form a gap between the supply side terminal 3 and the connection between the supply side terminal 3 and the demand side terminal 5.
[0053]
The switch 32 includes a pressing portion 37 that is pressed by the protrusion 34 and a spring portion 38 that protrudes from the pressing portion 37 on the switching device body 1 side. And a cutting posture in which the electrical contact 31 cuts between the terminals 3 and 5. The pressing part 37 is formed in a substantially rectangular parallelepiped from, for example, an insulating synthetic resin. The spring portion 38 is formed, for example, from an insulating synthetic resin into a rod shape having elasticity, and the electric contact 31 is engaged with the tip of the spring portion 38.
[0054]
The switch 32 is inserted into the switch insertion hole 40 of the inner lid 39 and the switch insertion hole 42 of the cover 41. At this time, the pressing portion 37 slightly protrudes from the switch insertion holes 40 and 42. The switch insertion holes 40 and 42 are slightly larger than the pressing portion 37 so that the pressing portion 37 can be inclined when the pressing portion 37 is pressed by the projection 34 of the lid 33.
[0055]
The protrusion 34 is formed at a portion eccentric from the center inside the lid 33. When the lid 33 is mounted on the opening / closing device body 1, the protrusion 34 presses a portion eccentric from the center of the pressing portion 37 of the switch 32, and the pressing portion 37 is inclined. A predetermined gap is formed between the lid 33 and the cover 41 so that the pressing portion 37 can be inclined.
[0056]
The lid 33 can be attached to the switchgear main body 1 with the protrusion 34 positioned on the demand side terminal 5 side. The lid 33 can be attached to the switchgear body 1 with the protrusion 34 positioned on the supply side terminal 3 side. By changing the mounting direction of the lid 33, the projection 34 presses a different portion of the pressing portion 37 to switch between the connection posture and the cutting posture of the switch 32. As a result, the electrical contact 31 moves to switch between a conductive state and a non-conductive state between the terminals 3 and 5, and to switch between power feeding and power feeding stop.
[0057]
Next, the operation of the electrical contact 31 when the lid 33 is attached to the switchgear body 1 will be described. First, when the lid 34 is mounted on the switchgear body 1 shown in FIG. 8 with the projection 34 positioned on the demand side terminal 5 side, the projection 34 is pressed by the switch 32 as shown in FIG. The demand side terminal 5 side of the part 37 is pressed. The pressing portion 37 is inclined so as to push in the demand side terminal 5 side, and the spring portion 38 is deformed. Due to the restoring force of the spring portion 38, the electric contact 31 moves to the supply side terminal 3 side. The electrical contact 31 comes into contact with the supply-side terminal 3, and the connection between the terminals 3 and 5 is switched to a conductive state.
[0058]
Further, when the lid 34 is mounted on the switch body 1 shown in FIG. 8 with the projection 34 positioned on the supply side terminal 3 side, the projection 34 is a pressing portion of the switch 32 as shown in FIG. 9B. The supply side terminal 3 side of 37 is pressed. The pressing portion 37 is inclined so as to push in the demand side terminal 5 side, and the spring portion 38 is deformed. Due to the restoring force of the spring portion 38, the electric contact 31 is in a cutting posture in which it moves to the demand side terminal 5 side. The electrical contact 31 is separated from the supply-side terminal 3, and the terminals are switched to the non-conductive state.
[0059]
【The invention's effect】
As is apparent from the above description, according to the present invention, by providing a lid that covers the electrically conductive portion of the switchgear body, it is possible to prevent a user or an operator from inadvertently touching the electrically conductive portion and receiving an electric shock. it can. The appearance of the lid can be made the same in both the power supply state and the power supply stop state, and the power supply state and power supply stop state of each door can be made indistinguishable by a third party.
[0060]
When the lid is removed in order to switch between power supply stop and release, the cover covers the electrically conducting portion except for the insertion hole for inserting the switching means, so that the operator can be prevented from receiving an electric shock. As a result, when opening and closing the power supply opening and closing device, the opening and closing operation can be performed safely and quickly without wearing special protective equipment such as a protective surface and protective gloves, and the cost of the opening and closing operation is reduced. can do.
[0061]
By attaching the lid and cover with special screws that are not generally used, it is possible to prevent unauthorized operations by consumers. Thereby, while being able to prevent a user's electric shock, theft by the consumer etc. can be prevented.
[0062]
Further, since the lid has a simple structure provided with switching means and can be reduced in size, the installation space can be reduced and the manufacturing cost can be reduced.
[Brief description of the drawings]
[Figure 1] Salary A perspective view when the lid of the electric switchgear is mounted ( reference Form)
FIG. 2 is a perspective view when the lid of the power supply switching device is removed.
FIG. 3 is a perspective view showing the inside of the switchgear body.
FIG. 4 is a perspective view of a lid without a conductor.
FIG. 5 is a perspective view showing a state in which the cover is displaced.
6 is a cross-sectional view taken along the line AA in FIG. 1, showing a case where a conductor is provided on the lid.
7 is a cross-sectional view taken along the line AA in FIG. 1, showing a case where no conductor is provided on the lid.
FIG. 8 is a cross-sectional view before the lid is mounted ( Of the present invention Embodiment)
9A and 9B are cross-sectional views after the lid is mounted, in which FIG. 9A shows a conductive state and FIG. 9B shows a non-conductive state.
FIG. 10 is a front view around a mounting portion of a conventional power supply switchgear for attaching / detaching a conductive plug;
FIG. 11 is a configuration diagram of a power feeding switchgear provided with a remote control stop canceling device.
[Explanation of symbols]
1 Switchgear body
2 Supply side wiring
3 Supply side terminal
4 demand side wiring
5 Terminals for demand
6 Cover
7 Lid
8 Conductor
9 Clearance
22, 27 Special screw
23 Conductor insertion hole
31 Electrical contacts
32 switches
33 lid
34 Protrusion

Claims (4)

In a power supply switchgear that opens and closes a wiring for supplying power from a supply side to a demand side, a supply side terminal that connects the supply side wiring to the switchgear body, and a demand side terminal that connects the demand side wiring Is provided with a predetermined interval, and an insulating lid is provided to cover the electrical conduction portion of the switchgear body so that the electrical conduction portion is not exposed to the outside. Switching means for switching to one of the conductive states is provided, and the switching means includes an electrical contact for connecting or disconnecting both terminals, a switch connected to the electrical contact, and a lid for pressing the switch. The switch is movable between a connection posture in which the two terminals are connected by the electric contact and a cutting posture in which the two terminals are cut by the electric contact, The protrusions indicate the mounting direction of the lid Pressing the different parts of the switch by obtaining, by moving an electrical contact switch and a cutting position and the connecting position of the switch, and wherein the switch over to one of a conducting state and a non-conducting state between the terminals Power supply switchgear. The power supply opening / closing device according to claim 1, wherein the lid attached to the opening / closing device body is removable with a dedicated tool so as to prevent unauthorized operation. An insulating cover is provided on the inner side of the lid so as to prevent the electrically conductive portion of the switchgear body from being exposed to the outside, and an insertion hole for inserting the switching means is formed in the cover. The power feeding switchgear according to claim 1 or 2 , characterized in that The power supply switchgear according to claim 3, wherein the cover attached to the switchgear main body is removable with a dedicated tool so as to prevent unauthorized operation.

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