JPH08329764A - Lock mechanism of switch and uninterruptible power supply device - Google Patents

Abstract

PURPOSE: To perform switching operation in a right operation procedure without looking at an operation manual by mechanically specifying the operation procedures for opening closing of plural switches. CONSTITUTION: Plural switches 3, 4 and 5 where handles to operate opening- closing are protrusively installed on the surface of a panel 11 and a lock plate 13 having a specific shape to restrict opening-closing operation of the other switches except specific switches by restricting operation areas 3b, 4b and 5b of the respective handles protruding from the panel 11, are provide on the panel 11. The lock plate 13 is slidingly operated, and the specific switches are changed to the other switches.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch lock mechanism for specifying an opening / closing operation sequence and an uninterruptible power supply unit equipped with the switch lock mechanism.

[0002]

2. Description of the Related Art An uninterruptible power supply system continuously outputs AC voltage using a built-in battery as a power source when a power failure occurs in an AC power source, and it is necessary to occasionally perform maintenance and inspection in preparation for a power failure. Is. Also, when the load is important,
Even when the built-in battery is replaced, the periodic inspection is performed, or the unit is repaired, it may be necessary to continue supplying power to the load. In preparation for such a case, a maintenance bypass circuit as shown in FIG. 7 is required.

In FIG. 7, reference numeral 1 denotes an AC power source input,
The uninterruptible unit 2 that continuously outputs a constant AC voltage when a power failure or abnormal voltage drop occurs is the above-mentioned maintenance bypass circuit. The maintenance bypass circuit 2 includes a switch 3 for opening / closing between an AC power supply and an input side of the uninterruptible unit 1, a switch 4 for opening / closing between an output side of the uninterruptible unit 1 and a load, and an AC power supply and a load. A switch 5 for opening and closing the space is provided, and normally the switches 3 and 4 are closed, and the switch 5 is opened to operate the uninterruptible unit 1 to supply power to the load. When the uninterruptible unit 1 is to be maintained, the operation switch provided in the uninterruptible unit 1 is turned off and switched to the bypass circuit 1a provided inside the uninterruptible unit 1, and then the switch 5 is closed to switch the switch. Three
And 4 are opened. As a result, the path of the power supplied to the load is switched from the bypass circuit 1a provided inside the uninterruptible unit 1 to the circuit of the switch 5,
It is possible to perform maintenance work by keeping the uninterruptible unit 1 in a non-energized state while continuing to supply electric power.

When the uninterruptible unit 1 is returned to the normal operating state, the switches 3 and 4 are closed, the operation switch provided in the uninterruptible unit 1 is turned on and the switch 5 is opened, and the normal operation is performed. Return to the state. Switch 3 to above
A series of operation procedures of No. 5 are indicated by a caution name plate and an instruction manual to prevent erroneous operation.

[0005]

However, in the above-mentioned conventional method, since a person operates while referring to the instruction manual and the actual product, there is a case where the operation is erroneous, and when the operation procedure is incorrect, the load is supplied to the load. Power is cut off unnecessarily,
There was a risk of inducing unexpected disabilities.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to mechanically specify an operation procedure for opening and closing a plurality of switches without looking at an instruction manual. An object of the present invention is to provide a switch lock mechanism and an uninterruptible power supply device that can perform a switching operation in a correct operation procedure.

[0007]

SUMMARY OF THE INVENTION A switch lock mechanism according to the present invention limits a plurality of switches, each of which has a handle for opening and closing and which is mounted on a surface of a panel so as to project therefrom, and an operating area of each handle which projects from the panel. Then, a lock plate having a specific shape that restricts the opening / closing operation of other switches except the specific switch is provided on the panel, and the specific switch is changed to another switch by slidingly operating the lock plate. (Claim 1) Further, the lock plate is provided with a cutout portion of a specific shape that limits an operation region determined by a stroke length and a handle width of opening / closing operation of each handle, and the cutout portion opens / closes the specific switch. Then, by slidingly operating the lock plate, the operation area of the specific switch is limited to make the opening / closing operation impossible, and the opening / closing operation is performed by removing the restriction of the operation area of any one of the other switches. It is possible to make it possible, and the shape is provided with a locking portion that changes the specific switch to another switch. (Claim 2) Furthermore, the cutout portion is provided with a stopper portion that prevents the locking plate from sliding at the handle end of the specific switch, and the stopper portion is released by opening and closing the specific switch. To do. (Claim 3) Further, the cutout portion is provided with a locking portion that restricts opening / closing operations of all the switches when the locking plate is at the right end position or the left end position. (Claim 4) Further, a transparent window is provided at a predetermined position of the lock plate, a mark for specifying the slide position of the lock plate is attached to the surface of the panel, and the lock plate is slid. To display the mark on the window. (Claim 5) The uninterruptible power supply of the present invention is an uninterruptible unit that supplies AC power to a load by continuously outputting an AC voltage even when an AC power is input and a power failure occurs. A first switch for opening and closing the input side of the uninterruptible unit and a second switch for opening and closing the output side of the uninterruptible unit and the load
Third switch for opening and closing between the switch, the AC power supply and the load
A maintenance unit having a switch, the first, second, and third switches are arranged side by side on a panel of the maintenance unit, and the first, second, and third switches are locked with the switches described above. When a mechanism is provided and the uninterruptible unit is maintained, the first, second, and
Open and close the third switch. (Claim 6) Further, the maintenance unit includes a flat surface portion orthogonal to the panel surface, and a mounting portion continuous from the flat surface portion above the panel surface, and the mounting portion is screwed to the flat surface of the uninterruptible unit. The maintenance unit is stopped and attached, and a bent portion orthogonal to the panel surface is provided on a side of the locking plate near the mounting portion, and the mounting portion is attached to the bending portion at a specific position of the locking plate. A notch is provided at the corresponding position of the screwing point so that the screw can be attached and detached only at this specific position. (Claim 7)

[0008]

The lock mechanism of the switch of the present invention restricts the opening / closing operation of the other switches except the specific switch by the locking plate of the specific shape, and the locking switch plate is slid to operate the other specific switch. Change to a switch. (Claim 1) Further, when the lock switch is slid by opening and closing the specific switch, the notch provided in the lock plate limits the operation area of the specific switch to disable the open and close operation. At the same time, the opening / closing operation can be performed by removing the restriction on the operation area of any one of the other switches. (Claim 2) Further, the sliding operation of the lock plate is blocked at the handle end of the specific switch by the stopper portion provided in the notch,
Further opening and closing of the specific switch allows further sliding. (Claim 3) Further, when the locking plate is slid to the right end or the left end, the locking part restricts the opening / closing operation of all the switches. (Claim 4) Further, when the lock plate is slid, a mark for specifying the slide position of the lock plate is displayed in the window of the lock plate. (Claim 5) In the uninterruptible power supply device of the present invention, the AC power supply and the load are connected to the maintenance unit, the uninterruptible unit and the maintenance unit are connected, and the first and second switches are turned on and the third switch is turned on. It is operated in the off state. When performing maintenance on the uninterruptible unit, by sliding the lock plate, the first, second, and third switches are opened / closed in a specified procedure, and the first and second switches are turned off and the first switch is turned off. Perform maintenance work with the switch of 3 turned on. (Claim 6) Further, when the lock plate is slid to a specific position where the first and second switches are turned off and the third switch is turned on, a notch formed in a bent portion of the lock plate. Is set to the screwing point of the mounting part, and the uninterruptible unit can be installed and removed while the power is off, and maintenance work can be performed safely. (Claim 7)

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a switch lock mechanism according to claims 1 to 5 of the present invention. (a) is a view seen from a switch operation surface side of the panel 11, and (b) is a side sectional view of the panel 11 seen from below.

In FIG. 1, the switches 3 to 5 are provided with a support plate 12
The handles 3a to 5a that are mounted on the
Mounted protrudingly on 11 surfaces. 13 is a lock plate slidably mounted on the panel 11, which has a specific shape that restricts the operation area of each handle 3a to 5a protruding from the panel 11 to restrict the opening and closing operations of other switches except the specific switch. Locking parts 13c to 13e and 13c 'to 13e' are provided. That is, the lock plate 13 is fixed on the panel 11 by the screws 14a, 14b via the slits 13a, 13b of a constant length, and the screws 14a,
It can be slid to the left and right by loosening 14b. The operating area of each handle 3a-5a when opening / closing each switch 3-5 is the stroke length of the opening / closing operation of each handle 3a-5a as shown by the shaded portions 3b-5b in FIG. 1 (a). Determined by the handle width, the lock parts 13c to 13e, 13 of the lock plate 13
The c ′ to 13e ′ function by the notch provided in the lock plate 13 so that the handles 3a to 5a of the respective switches are restrained in the ON or OFF position. The material of the lock plate 13 is the handle
It is sufficient that it has a strength that suppresses the operation force of 3a to 5a, and a transparent acrylic plate can be used so as not to spoil the appearance. Further, the operation portion 13m can be provided to facilitate the slide operation.

FIG. 1A shows a state in which all the switches are locked with the switch 5 off and the switches 3 and 4 on. Here, when the locking plate 13 is slid to the left by d1, the right side of the handle 5a abuts on the stopper portion 13f of the cutout portion of the locking plate 13 and cannot be slid further to the left. In this state, the handle 5a of the switch 5
The operation area 5b is secured, the opening / closing operation of the switch 5 becomes possible, and the opening / closing operation of other switches except the switch 5 is restricted. When the switch 5 is turned on in this state, the right side of the handle 5a is released from the restraint of the stopper portion 13f, and the locking plate 13 can be further slid to the left side.
Then, when the lock plate 13 is slid to the left by d2,
The right side of the handle 3a is the stopper part 13 of the cutout part of the locking plate 13.
It hits g and can no longer slide to the left. In this state, the operation area 5b of the switch 5 is restricted by the locking portion 13c ', and the switch 5 remains in the on state and cannot be turned off. Also, the handle of the switch 3
Since the operation area 3b of 3a is secured, the switch 3 can be opened and closed, and the specific switch can be changed from the switch 5 to the switch 3. In the same manner, by sequentially sliding the lock plate 13 to the left, the specific switches can be sequentially switched to open / close the switches in the specified order. The undo operation can be performed in the same manner.

Further, as shown in FIG. 1 (c), transparent windows 13n to 13r are provided at predetermined positions of the locking plate 13, and the sliding position of the locking plate 13 is set at a predetermined position of the panel 11. When the lock plate 13 is slide-operated with a specific mark, the window
A specific mark can be displayed on 13n to 13r. That is, the windows 13n to 13q are provided in the vicinity of the handles 3a to 5a of each switch, and when the position of the lock plate 13 is slid to a position where the opening and closing operation of each switch can be performed, the windows 11n to 13q are written in advance on the panel 11. Mark the window with a different color (for example, red) 13n
It can be displayed on ~ 13q to indicate that the switch is operable. Further, the window portion 13r can be provided at any position, and the numbers 0 to 4 for specifying the position of the locking plate 13 at the position of the panel 11 corresponding to the position of the window portion 13r of the panel 11 can be provided.
The slide position of the lock plate 13 can be displayed with a code. (Claim 5) FIG. 2 is a view showing a concrete example of the notch portion provided in the locking plate 13. This embodiment shows an example of the shape of the cutout when three switches having the shape shown in FIG. 2 (b) are arranged side by side and the switching operation is performed in the mode shown in FIG. 2 (a). It is a figure. That is, in mode 0, the switch 5 is off and the switches 3 and 4 are on, and the switching operation of all the switches is restricted. In mode 1, only the switch 5 can be switched, and in mode 2, only the switch 3 can be switched. In the mode 3, only the switch 4 can be switched. In the mode 4, the switch 5 is turned on and the switches 3 and 4 are turned off to restrict the switching operation of all the switches.

When the width of the handle of the switch is A, the stroke length inside the handle when opening and closing the operation surface of the panel 11 is C, and the stroke length outside is D, the operation area of the handle is shown in FIG. The range is as shown in
By restricting the range BA indicated by diagonal lines with the lock plate 13, the opening / closing operation of the switch can be restricted.

FIG. 2 (d) shows the shape of the notch 13s for the switch 5 when the lock plate 13 is slid from right to left so as to change to modes 0, 1, 2, 3, and 4. It is the figure shown. That is, in mode 0, the switch 5 is in the off state, and the locking portion 13c of the cutout portion 13s limits the operation area to restrict the opening / closing operation while keeping the off state. In this case, the side length B1 of the locking portion 13c is set to the switch 5
Set the length so that the opening / closing operation of the handle can be reliably restrained. When the lock plate 13 is slid to the left by the length B1, the stopper portion 13f of the cutout portion 13s hits the handle of the switch 5 and cannot be slid further leftward.
In this state, the cutout portion that secures the operation area moves above the switch 5, the restriction of the opening / closing operation of the switch 5 is released, the switching operation becomes possible, and the mode 1 is changed. Here, when the switch 5 is operated from off to on, the switch 5
The handle is disengaged from the stopper portion 13f, and the locking plate 13 can be further slid to the left. Further to the left, length B2, B
When sliding 3 and B4, the mode changes to modes 2, 3 and 4, and the locking portion 13c 'of the notch 13s limits the operation area and restricts the opening / closing operation while keeping the ON state. Therefore, the lock plate 13
The length of B1, B2, B3, B4 is sequentially slid to the left to change from mode 0 to modes 1, 2, 3, 4 and the shape of the cutout 13s of the lock plate 13 with respect to the switch 5 is changed. Can be determined.

In FIG. 2 (e), similarly, the shapes of the cutouts 13t and 13u for the switches 3 and 4 are determined, and the cutouts of the lock plate 13 when the switches 5, 3 and 4 are arranged in order from the left. 13s,
It is the figure which showed 13t and 13u. The locking portions 13c to 13e,
The lengths B1, B2, B3 and B4 of 13c 'to 13e' need not be equal. Further, the switches 5, 3 and 4 do not need to be arranged in a horizontal row and can be arbitrarily arranged, and the number of switches is not limited to three. Further, if the positions of the locking portions 13c to 13e, 13c 'to 13e' and the stopper portions 13f to 13h, 13f 'to 13h' can be secured, variously modified notched locking plates can be obtained.

An embodiment of an uninterruptible power supply device corresponding to claim 6 of the present invention is shown in FIGS. In FIG. 3, (a) is a plan view, (b) is a side view, (c) is a rear view, 1 is an uninterruptible unit, 2 is a maintenance unit having switches 3 to 5, Are the same. However, the maintenance unit 2 has the following functions.

The maintenance unit 2 is attached to the back surface of the uninterruptible unit 1 by screws and is connected to the uninterruptible unit 1 via a connector 7. The external line connecting to the AC power source and the load is connected via a connection terminal 8 provided inside the maintenance unit 2. Further, the maintenance unit 2 can be easily separated from the uninterruptible unit 1 by removing the screw.

The switches 3 to 3 provided on the maintenance unit 2
5, a handle for operating the opening and closing is attached so as to project on the operation panel surface, and the switch locking mechanism having the locking plate 13 described in FIG. 1 is attached on the panel surface.

The relationship between the sliding operation of the lock plate 13 and the opening / closing operation of the switches 3 to 5 will be described with reference to FIG. When performing maintenance work on the uninterruptible unit 1, the maintenance unit 2
As described above, the opening / closing operation of each of the switches 3 to 5 must be operated in a correct procedure so that the power supplied to the load continues.

FIG. 5 (a) shows a state in which the lock plate 13 is located on the rightmost side (mode 0), in which the switch 5 is turned off and the switches 3 and 4 are turned on. Is driving. In this state, the lock parts 13c to 13e of the cutouts provided on the lock plate 13 are used for all the switches 3
The opening and closing operations of 5 are restricted and fixed.

FIG. 5 (b) shows a state in which the lock plate 13 is slid to the left by B1 (mode 1). When B1 is slid to the left from the state of mode 0, the stopper portion 13f of the notch provided on the lock plate 13 hits the handle of the switch 5 and cannot be slid to the left any further. In this state (mode 1), the restriction on the opening / closing operation of the switch 5 is released, and the switch 5 can be operated from off to on. When the switch 5 is operated from off to on,
The handle of the switch 5 is disengaged from the stopper portion 13f, and the locking plate 13 can be further slid to the left.

FIG. 5 (c) shows a state (mode 2) in which the lock plate 13 is slid further left B2 from the state of FIG. 5 (b). In this state, the notched stopper portion 13g provided on the lock plate 13 hits the handle of the switch 3, and the stopper portion 13g cannot slide to the left any further. Also, the switch 5 is in a state in which the opening / closing operation is restricted by the locking portion 13c 'while it is on, and the switch 3 is released from the constraint of the locking portion 13d and can be operated from on to off. Also, when the switch 3 is operated from on to off, the handle of the switch 3 comes off from the stopper portion 13g and the locking plate.
13 can be further slid to the left.

FIG. 5 (d) shows a state (mode 3) in which the lock plate 13 is further slid left B3 from the state of FIG. 5 (c). When this happens, the stopper 13h
It hits the handle of and cannot slide to the left any further. Further, the switch 3 remains in the off state by the locking portion 13d ′ and the opening / closing operation is restricted, and the switch 4
Is released from the restraint of the locking portion 13e and can be operated from on to off. When the switch 4 is operated from on to off, the handle of the switch 4 is disengaged from the stopper portion 13h, and the locking plate 13 can be further slid to the left side.

FIG. 5 (e) shows a state (mode 4) in which the lock plate 13 is slid further left B4 from the state of FIG. 5 (d). When this happens, the stopper 13i
It hits the handle of and cannot slide to the left any further. Further, the switch 4 is in a state in which the open / close operation is restricted by the locking portion 13e ′ while it is off, and all the switches 3 to 5 are in a fixed state in which the open / close operation is restricted.

As described above, when the uninterruptible unit 1 is maintained, the lock plate 13 is sequentially slid to the left to operate mode 0 → mode 1 → switch 5 from on to off →
Mode 2 → Switch 3 is operated from on to off → Mode 3
→ The switch 4 is operated from on to off → By opening and closing the switches 3 to 5 in the procedure to reach the mode 4, anyone can perform the switching operation in the correct procedure and disconnect the uninterruptible unit. When the operation of the uninterruptible unit 1 is restarted after finishing the maintenance work, the locking plate 13 is sequentially slid to the right side, and the switches 3 to 5 are opened / closed in the reverse procedure from mode 4 to mode 0. As a result, the switching operation can be similarly performed in the correct procedure to restart the operation of the uninterruptible unit 1.

FIG. 6 shows an embodiment of an uninterruptible power supply system corresponding to claim 7 of the present invention. As shown in FIGS. 6 (a) and 6 (b),
The maintenance unit 2 has a flat surface portion 15 orthogonal to the panel surface 11 and a mounting portion 16 continuous from the flat surface portion 15 above the panel surface 11, and the mounting portion 16 is screwed to the flat surface of the uninterruptible unit 1 for maintenance. The unit 2 is attached, and the bent portion 17 orthogonal to the panel surface 11 is provided on the side closer to the mounting portion 16 of the locking plate 13, and the mounting portion 16 is screwed to the bending portion 17 at a specific position of the locking plate 13. A notch 18 is provided at a position corresponding to 19, and the screw 19 can be attached and detached only at this specific position. That is, as described above, when the uninterruptible unit 1 is maintained, the uninterruptible unit 1 is disconnected in the mode 4 state.
As shown in (c), the sliding position of the lock plate 13 is the mode 4
The cutout portion 18 of the bent portion 17 is set to be the position of the screwed portion 19 of the mounting portion 16 at a specific position. According to this embodiment, unless the mode 4 is set, the uninterruptible unit 1
Since it cannot be removed, safer maintenance work can be performed. (Claim 7)

[0027]

According to the switch lock mechanism of the present invention, it is possible to correctly perform the opening / closing operation procedure specified for a plurality of switches without referring to an instruction manual or the like. Further, according to the uninterruptible power supply device of the present invention, when performing maintenance of the uninterruptible unit, a switching operation of a plurality of switches is performed in a correct procedure, and the power supplied to the load is not interrupted unnecessarily Maintenance work can be performed.

[Brief description of drawings]

1A and 1B are views showing an embodiment of a switch lock mechanism according to claims 1 to 5 of the present invention, wherein FIGS. 1A and 1C are views of an operation panel viewed from the front, and FIG. 1B is an operation panel. The sectional side view which looked at from below.

FIG. 2 is a view for explaining a cutout portion of a locking plate used in the above embodiment.

FIG. 3 is a diagram showing an embodiment of an uninterruptible power supply device according to claim 6 of the present invention, (a) is a plan view, (b) is a side view, and (c).
Is the rear view.

FIG. 4 is a circuit diagram of an embodiment of the uninterruptible power supply device.

FIG. 5 is a view for explaining the action of the lock plate used in the above embodiment.

FIG. 6 is a view showing an embodiment of an uninterruptible power supply device according to claim 7 of the present invention, (a) and (c) are rear views, and (b) is a side view.

FIG. 7 is a circuit diagram of a conventional uninterruptible power supply device.

[Explanation of symbols]

1 ... Uninterruptible unit 2 ... Maintenance unit 3 to 5 ... Switch 7 ... Connector 8 ... Connecting terminal 11 ... Panel 12 ... Support plate 13 ... Lock plate 13a, 13b ... Slit 13c to 13e, 13c 'to 13e' ... Lock Parts 13f to 13h, 13f 'to 13h' ... Stopper parts 13n to 13r ... Window parts 13s to 13u ...
Notch 14a, 14b… Screw 15… Flat part 16… Mounting part 17… Bend 18… Notch 19… Screw stop

Front Page Continuation (72) Inventor Shigetoshi Higaki No. 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu factory

Claims (7)

[Claims] 1. A lock mechanism for restricting the operation of a plurality of switches, each of which has a handle arranged to project from a desired portion of a surface of a casing and which operates to open and close, wherein an operating region of the handle is restricted. A lock mechanism for a switch, which is equipped with a locking plate that restricts opening and closing collectively. 2. The lock mechanism for a switch according to claim 1, wherein the locking plate includes a cutout portion that limits an operation area determined by a stroke length and a handle width of opening / closing operation of each handle. And the lock mechanism of the switch. 3. A lock mechanism for a switch according to claim 2, wherein the cutout portion is provided with a stopper portion that prevents the lock plate from operating at a handle end of a specific switch. Lock mechanism. 4. The lock mechanism for a switch according to claim 3, wherein the cutout portion includes a locking portion that restricts opening / closing operations of all the switches when the locking plate is in a predetermined position. The lock mechanism of the switch. 5. The lock mechanism for a switch according to claim 2, wherein a window is provided at a predetermined position of the locking plate, and a sliding position of the locking plate is provided on the surface of the casing. A lock mechanism for a switch, characterized in that the mark is displayed on the window by operating a lock plate with a specific mark. 6. An uninterruptible unit that continuously outputs an AC voltage and supplies power to a load when an AC power source is input and a power failure occurs, and between the AC power source and the input side of the uninterruptible unit. A maintenance unit having a first switch for opening and closing the switch, a second switch for opening and closing the output side of the uninterruptible unit and the load, and a third switch for opening and closing the AC power supply and the load, The first, second and third switches are arranged side by side on the panel of the maintenance unit,
The lock mechanism of the switch according to any one of claims 1 to 5 is provided to the first, second, and third switches, and when the uninterruptible unit is maintained, the first procedure is performed in a specified procedure. An uninterruptible power supply characterized by opening, closing, and opening second and third switches. 7. The uninterruptible power supply according to claim 6, wherein the maintenance unit includes a flat surface portion orthogonal to the panel surface and a mounting portion continuous from the flat surface portion above the panel surface. The maintenance unit is attached to the plane of the power failure unit by screwing the mounting portion, and a bent portion orthogonal to the panel surface is provided on the side of the locking plate near the mounting portion, and the specific position of the locking plate. A notch is provided in the bent portion at a position corresponding to the screwed portion of the mounting portion,
An uninterruptible power supply characterized by being able to attach and remove screws only at this specific position.