JPH0747576Y2 - Control panel door interlock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a door interface that acts so that one door cannot be completely closed when the other door is open in a control panel whose door is a double door. Involved in locking devices,
The present invention relates to a door interlock device for a mechanical control panel, which is composed of a cam, a roller and a slide member.

[Conventional technology]

When maintaining or inspecting electrical equipment housed inside the control panel, turn off the breaker to shut off the circuit before opening the door. Then, after the work is completed, the door is completely closed and the breaker is turned on to turn on the power. in this case,
If the breaker is turned on and the power is turned on with the door open due to carelessness, an electric shock to workers or a short-circuit accident may occur. Therefore, the breaker is equipped with a safety device that can be turned on only when the door is completely closed. Conventionally, as a control panel having a breaker equipped with this type of safety device and having a double-door door, there is a control panel shown in FIG. In FIG. 5, reference numeral 21 is a control panel body, and an electric device 28 is housed therein. A left door 22 and a right door 23 are attached to the control panel body 21 in a double door structure.When the right door 23 is closed with the left door 22 closed, the right door 23 partially overlaps the left door 22. ing. As a result, when the left and right doors 22 and 23 are closed and the right door 23 is locked, the left door 22
Is automatically locked. Reference numeral 24 is a breaker, which is fixed to the front surface of an electric device 28 housed in the control panel body 21, and has an operating handle 25 and a lock lever as shown in FIG.
26 and. The lock lever 26 is interlocked with a lock mechanism (not shown) in the breaker 24, and a safety device is configured so that the operation handle 25 cannot be turned ON from the OFF position unless the lock lever 26 is pushed up. The right door 23 has a hole 23a so that the handle of the breaker 24 can be operated with the right door 23 closed, and the plate 27 is screwed inside. As shown in FIG. 7, the plate 27 has an engaging piece portion 28 for releasably engaging with the lock lever 26 of the breaker 24. When the right door 23 is completely closed, the lock lever 26 of the breaker 24 is
It engages with the engaging piece portion 28, rides on the inclined surface 28a of the engaging piece portion 28, and sinks into the concave portion 28b. This allows the lock lever 2
6 is in a pushed-up state as shown by the one-dot chain line, the operation handle 25 can be turned ON from the OFF position, and the lock lever 26 is locked in the recess 28b of the engaging piece portion 28, so that the right The door 23 is automatically locked.

[Problems to be solved by the device]

In a control panel with a breaker equipped with the safety device described in the prior art, after maintenance and inspection of the electrical equipment housed in the control panel is completed, the door is closed and the operation handle of the breaker is turned on to turn it on. If the number of doors is one, the operation handle of the breaker cannot be turned on unless the door is completely closed, which is safe. But,
When there are two doors, even if the left door 22 is open as described above, if the right door 23 is completely closed, the operation handle of the breaker 24 can be operated.
Since 25 can be turned on, there is a risk of electric shock, short circuit accident, etc. of workers due to carelessness. Therefore, the left door 22
It is necessary to provide a door interlock device that cannot completely close the right door 23 when the door is open. As such a door interlock device, there is a device that electrically interlocks by providing a door detection switch for the left door 22, but it is necessary to add a complicated electrical configuration, and it is reliable because it is electrical. It has a problem of lack of sex.

The present invention has been made in view of the above problems of the conventional technology, and an object thereof is to provide a mechanical door interlock device having a simple structure and high reliability. It is a thing.

[Means for Solving the Problems]

In order to achieve the above object, the door interlock device of the present invention is provided on the left and right doors which are attached to the control panel body in a double door and one of which partially overlaps with the other, and the upper part of each of the other door and the one door. The first and second cam plates protruding toward the inside of the control panel main body, and the first and second rollers engaging with the first and second cam plates are slidable in the left-right direction. A door interlock device comprising a slide member urged in one direction and provided in the main body, wherein an interval between the first and second rollers is an interval between the first and second cam plates. The second cam plate of the other door is engaged with the second roller by the first cam plate of the other door engaging with the first roller to slide the slide member in the left-right direction. It is possible to combine.

[Action]

If the other door is closed and the first cam plate of the other door and the first roller are not engaged, the slide member will not slide, and even if one door is closed, the end portion of the second cam plate of one door will not move. One of the doors does not completely close due to the contact with the second roller. Further, when the other door is closed, the first roller presses the first cam plate and also serves as a mooring means for the other door.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view showing a control panel equipped with a door interlock device of the present invention, FIG. 2 is a view showing a door interlock device of the present invention, and is a sectional view taken along line AA of FIG. 1, and FIG. BB of FIG.
A sectional view and FIG. 4 are sectional views taken along the line CC of FIG.

The parts having the same functions as those in FIGS. 5 to 7 are designated by the same reference numerals, and the description thereof will be omitted. The difference from FIGS. 5 to 7 is that a mechanical door interlock device is installed on the control panel.

1 to 4, the door interlock device 1 is
The sliding portion 15 provided on the opening side ceiling of the control panel body 21, the first cam plate 3 provided on the upper part of the left door 22, and the second cam plate 4 provided on the upper part of the right door 23 Become. The sliding portion 15 includes a slide member 2, a support member 7, a guide wheel 8, and a spring member 9
And a first stop plate 11 and a second stop plate 12,
It is fixed to the opening side ceiling of the control panel body 21 at 13. The slide member 2 has a first roller 5 and a second roller 6 arranged in the left-right direction that engage with the first cam plate 3 and the second cam plate 4, and slides in the left-right direction along a guide wheel 8. Free,
It is biased to the left by the spring member 9. The two pairs of guide wheels 8 made of a spool-like member are fixed to the support member 7 by pivotal support at regular intervals in the left-right direction. One end 9a of the spring member 9 is supported by a support fitting 10 fixed to the support member 7,
The other end 9b is supported by the slide member 2 and constantly urges the slide member 2 to the left. The first stopper plate 11 and the second stopper plate 12 are fixed to the support member 7, and the first stopper plate 11 restricts the leftward sliding of the slide member 2 by the side surface 11a. The side surface 12a prevents the slide member 2 from running away to the right. The first cam plate 3 and the second cam plate 4 are formed in a tapered shape having inclined portions 3a and 4a, are provided on the upper portions of the left door 22 and the right door 23, and project into the main body. . The distance between the first roller 5 and the second roller 6 is smaller than the distance between the first cam plate 3 and the second cam plate 4. As a result, when the right door 23 is closed with the left door 22 open, the end 4c of the second cam plate 4 comes into contact with the second roller 6 and the right door 23 cannot be completely closed. When the right door 23 is closed with 22 closed, the first cam plate 3 engages with the first roller 5 so that the slide member 2 slides to the right, and the inclined portion of the second cam plate 4 is slid. 4a is second
The roller 6 can be engaged and the right door 23 can be completely closed. The spring member 9 is biased by the slide member 2
It is possible to make adjustments by using the preliminary hole 2b provided in the and the preliminary hole 10a provided in the support fitting 10.

Next, the operation and function of the door interlock device having the above structure will be described.

When carrying out maintenance, inspection, etc. of the electrical equipment 28 stored inside the control panel body 21, first move the operation handle 25 of the breaker 24.
Turn off and cut off the circuit. Then, the right door 23 is opened and then the left door 22 is opened to perform the work such as internal inspection. Left door 22
With the right door 23 opened, the slide member 2 is biased leftward by the spring member 9, so that the end surface 2a of the slide member 2 is in contact with the side surface 11a of the first stop plate 11 and the slide member 2 2 is at the leftmost position as shown by the alternate long and short dash line.
Further, the first roller 5 and the second roller 6 which are axially fixed to the slide member 2 are also at the left end position. When the work such as internal inspection is completed, the left door 22 is first closed. When the left door 22 is closed, the inclined portion 3a of the first cam plate 3 engages with the first roller 5, and the first cam plate 3 pushes the first roller 5 rightward against the biasing force of the spring member 9. To do. The first roller 5 rides on the inclined portion 3a of the first cam plate 3 while sliding to the right, moves to the intermediate position as shown by the alternate long and short dash line, and contacts the vertical portion 3b of the first cam plate 3. At this time, since the slide member 2 is biased leftward by the spring member 9, the first roller 5 presses the vertical portion 3b of the first cam plate 3 leftward, and the left door 22 is in a moored state. Becomes Therefore, it is not necessary to hold the left door 22 when closing the right door 23. As the first roller 5 slides from the left end position to the intermediate position, the slide member 2 also slides along the guide wheel 8 from the left end position to the intermediate position, and the second roller 6 also slides from the left end position to the intermediate position. It is moving. When the right door 23 is closed in this state, the inclined portion 4a of the second cam plate 4 engages with the second roller 6, and the second cam plate 4 presses the second roller 6 against the biasing force of the spring member 9. To do. Second
The roller 6 slides to the right while the inclined portion of the second cam plate 4
4a is moved up to the right end position as shown by the solid line and abuts on the vertical portion 4b of the second cam plate 4. At this time, even if the right door 23 is suddenly closed, the end surface 2c of the slide member 2 contacts the side surface 12a of the second stop plate 12, so that the slide member 2 is prevented from running to the right. As described above, the right door 23 can be completely closed by closing the left door 22 and then the right door 23. As a result, the lock lever 26 of the breaker 24 engages with the engaging piece portion 28 of the plate 27, and the inclined surface 28 of the engaging piece portion 28.
Ride a and immerse into the recess 28b. Therefore, the lock lever 26 is pushed up and can be turned on by rotating the operation handle 25 of the breaker 24 from the OFF position to the ON state. The right door 23 is automatically locked because it is hooked by 28b. However, if the right door 23 is closed with the left door 22 open,
Since the slide member 2 does not slide to the right, the second roller 6 is at the left end position, and the end 4c of the second cam plate 4 is in the second position.
The right door 23 cannot be completely closed by making contact with the roller 6, and the operation handle 25 of the breaker 24 cannot be turned ON from the OFF position. Therefore, if the left and right doors 22 and 23 are not completely closed, turn on the operation handle 25 of the breaker 24.
Therefore, the electric power cannot be turned on and the electric shock or short circuit accident of the worker can be surely prevented.

In the above embodiment, the breaker 24 shown in FIG. 5 is fixed to the electric device 28 in the control panel 21 and the right door 23 is closed.
The case where the right door 23 is locked by the lock lever 26 of the breaker 24 has been described. However, not only locking the right door 23 by the breaker 24, but turning the lever provided on the right door 23, the right door 23
The door interlock device of the present invention can be applied to a type in which the breaker is automatically turned on by mechanically locking the 23 and the control panel body 21.

Further, in the above embodiment, the case where the other door is the left door and the one door is the right door has been described, but it is applicable even when the other door is the right door and one door is the left door. It has the same effect as the example.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

It is a simple mechanical door interlock device composed of a cam, a roller and a slide member, so that one door cannot be closed without closing the other door without using a complicated electrical structure. can do. Therefore, for example, unless the left and right doors are completely closed, the breaker operation handle can be turned ON from the OFF position to be in the energized state. As a result, as one door is closed while the other door is open, and the operating handle of the breaker is turned ON, an unexpected electric shock or short circuit accident may occur due to carelessness. Can be surely prevented.

Further, when the other door is closed, the first roller presses the first cam plate and also serves as the mooring means of the other door, and when closing the one door, it is not necessary to hold the other door while closing the other door. You can open and close smoothly.

[Brief description of drawings]

FIG. 1 is a view showing a control panel equipped with a door interlock device of the present invention, FIG. 2 is a view showing a door interlock device of the present invention, and is a sectional view taken along line AA of FIG. 1, and FIG. BB of FIG.
Sectional view, FIG. 4 is a sectional view taken along line CC of FIG. 3, FIG. 5 is a view showing a conventional control panel, FIG. 6 is a view showing a breaker, and FIG. 7 is a view showing a plate of the breaker. . 1 ... Door interlock device, 2 ... Slide member, 3 ... First
Cam plate, 4 ... second cam plate, 5 ... first roller, 6 ... second roller, 8 ... guide wheel, 9 ... spring member.

Claims (2)

[Scope of utility model registration request] 1. A left and right door which is attached to a control panel main body in a double door and one of which partially overlaps the other, and a first door and a first door which are provided on respective upper portions of the other door and the one door and project toward the inside of the main body. Two cam plates and first and second rollers that engage with the first and second cam plates, and are slidable in the left-right direction and urged in one direction to be installed in the control panel body. A door interlock device comprising a sliding member,
The distance between the first and second rollers is narrower than the distance between the first and second cam plates, and the first cam plate of the other door is the first
A door interlock of a control panel, characterized in that the second cam plate of one of the doors can be engaged with the second roller by the slide member sliding leftward and rightward by engaging with the roller. apparatus. 2. A breaker is fixedly installed in the control panel, and the breaker is closed when one door partially overlaps with the other door.
The door interlock device for a control panel according to claim 1, further comprising a lock lever for locking the door.