JPH08240069A - Automatic open/close device for power supply device door - Google Patents

Abstract

PURPOSE: To provide a small and inexpensive device capable of smoothly opening and closing the double-leafed door of a power supply device such as a distribution panel automatically. CONSTITUTION: A linear motor 25 is mounted on the top plate of the enclosure 23 of a distribution panel via a turntable 30, and one end of a rod 28 reciprocated on the operation of a reversible motor 26 of the motor 25 via a linear head 27 is connected to a door 13 via a pin 34. Also, the motor 26 is driven in a forward direction to move the rod 28 unidirectionally. The door 13 is thereby turned about a hinge 21 and opened. In this case, the motor 25 turns for the top plate, and a relative angle between the rod 28 and the door 13 changes. Thus, an excessive force does not act on the motor 25 and the rod 28, thereby allowing the door 13 to be smoothly opened and closed with a small drive force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically opening and closing a single-open or double-open door provided on a power supply device.

[0002]

2. Description of the Related Art Conventionally, for example, in an unmanned building, various switchboards have been installed, and these are generally housed inside a housing. A door is attached to this housing and the door is always closed. Everything is kept out of dust and small animals such as insects and birds do not enter. In such switchboard equipment, periodical inspections are carried out in order to confirm its operation, and at that time, the doors are opened to inspect the inside.

On the other hand, the buildings of customers are becoming unmanned, and in that case, sensors for detecting the operating state are provided, and the output signals of these sensors are transmitted to a monitoring center having a staff member to detect a failure or the like. I'm trying to do. However, there is a limit in monitoring only by these sensors, and it is often impossible to properly respond to a failure. Therefore, a required number of industrial TV cameras (ITVs) are installed in an unmanned building, and these are remotely controlled to obtain an image of a desired part, or an infrared camera is installed to locate a defective contact point that cannot be found in a visible image. It has been proposed to find heating points by or to place both industrial television cameras and infrared cameras. The image information obtained by such an industrial TV camera or infrared camera is extremely useful, and a much larger amount of effective information can be obtained compared with the conventional case where an operating state is simply detected by a sensor. Will be done.

[0004]

As described above, when the operating state of the unmanned building is remotely controlled and monitored by the television camera, if the inside state of the switchboard provided in the unmanned building can be also monitored by the television camera. , More useful information will be obtained. However, since the switchboard is provided with the door as described above, and the door usually needs to be closed, it is not possible to monitor the internal state of the switchboard with the television camera.

Thus, in order to monitor the inside of the switchboard with the television camera, it is necessary to open the door when it is desired to monitor. Workers cannot open the doors in unmanned buildings, so a device that automatically opens and closes the doors is required. In general, the door of a switchboard is a single-sided door when it is small, and a double-sided door when it is large. In order to automatically open and close such a double door type door, the present inventors first connected the output shaft of a reversible geared motor having a gear having a reduction ratio of about 1/1500 to the pivot of the door. The device was developed.
Since the door is made of an iron plate with a thickness of about 2 to 3 mm, it has a considerable weight, and a geared motor with a considerably large output is required to apply a driving force to the pivot to rotate it. It has the drawback of being expensive. In addition, double-sided power supplies are often installed adjacent to each other, but when the geared motor is installed on the pivot of the door of the switchboard, the drive part protrudes from the switchboard and the switchboard is installed adjacently. Can't do it.

Further, in order to connect the output shaft of the geared motor to the pivot of the door of the existing switchboard, an appropriate connecting mechanism is required, but as described above, a considerable stress acts on this part. However, the mechanical strength must be extremely high, and there is also a drawback that it becomes large and expensive. Therefore, this method of connecting the geared motor to the pivot of the door is difficult to apply to the existing switchboard.

An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a device having a simple structure and a low cost, which can automatically open and close the door of a power supply device such as a switchboard.

[0008]

SUMMARY OF THE INVENTION The present invention is a device for automatically opening and closing a single-opening or double-opening door provided in a power supply device, wherein a fixing member to which a pivot of the door is fixed,
A linearized motor that connects a rod-shaped rack that linearly reciprocates via a pinion to the drive shaft of a reversible motor,
Attached via a rotation base rotatable about an axis parallel to the pivot axis of the door, and pivotally attach one end of the rack to the door,
The reversible motor is driven in one direction to move the rack in one direction to open the door, and the reversible motor is driven in the opposite direction to move the rack in the opposite direction to close the door. It is what

[0009]

In the automatic door opening / closing device for a power supply device according to the present invention described above, a linearized motor in which a rod-shaped rack that linearly reciprocates via a pinion is connected to a drive shaft of a reversible motor is used. Since the door is opened and closed by the reciprocating motion of the rack, the driving force is greater than that when the rotating shaft is directly attached to the door by pivotally attaching one end of the rack to the door at a position away from the door pivot. Is much smaller, and therefore, the linearized motor can have a small output and can be inexpensive. Further, the door axis does not need to be processed, and the axis has the same force as when the operator manually opens and closes the door, so that it can be applied to the existing switchboard as it is.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagrammatic view showing the overall construction of an unmanned building to which an embodiment of an automatic door opening / closing device for a power supply device according to the present invention is applied. As shown in FIG. 1, in this example, a switchboard 12 is arranged inside a building 11 of an unmanned building, and its door
13 is configured to open and close automatically by remote control. Of course, equipment other than the switchboard 12 is installed inside the building 11, but it is omitted for simplicity of the drawing. building
11 A television camera (industrial television camera) 14 for monitoring is placed inside, and this is placed on a pan / tilt platform 15,
The pan / tilt pan head can be remotely controlled while watching the image transmitted from the TV camera at the monitoring center. Pan with the TV camera 14 mounted like this
The tilt platform 15 is fixedly arranged in the building 11 or arranged on a rail so as to be movable along the rail. In the latter case, one TV camera can monitor a plurality of locations, but a moving mechanism is required. Further, it is preferable that the television camera 14 has a zoom lens so that the zoom ratio can be remotely controlled. Such a television camera and its operating mechanism are not the subject of the present invention and will not be described in further detail. An infrared camera may be provided in addition to or instead of the industrial television camera 14 described above.

When the operation state of the switchboard 13 is monitored by the TV camera 14, first, the door automatic opening / closing device according to the present invention is remotely driven to automatically open the door 13, and the pan / tilt platform 15 and the TV camera are used. The lens of (1) is appropriately remote-controlled so that a desired portion in the switchboard (12) is imaged by the television camera, and the image can be observed at the monitoring center. In this way, when the inspection of the operating status of the switchboard 12 is completed,
The door 13 is remotely controlled so as to be automatically closed.

2 and 3 are a front view and a plan view showing the door closed state of the automatic door opening / closing apparatus of this embodiment, and FIG. 4 is a plan view showing the same state when the door is opened. is there. The door 13 of the switchboard 12 in the present example is a single-sided door, and hinges 21 and 22 are pivotally attached to the housing 23 of the switchboard on one side thereof. A bus box 24 is provided above the door 13 of the switchboard 12. In this example, the linear motor 25 is arranged on the top plate of the housing of the bus box 24. The linear motor 25 includes a reversible motor 26 and a rod-shaped rack 28 connected to an output shaft of the reversible motor via a linear head 27 including a pinion.
And have. When the reversible motor 26 is driven in one direction,
The rack 28 moves in one direction, and when the reversible motor is driven in the opposite direction, the rack moves in the opposite direction.

The mount 29 for the linear motor 25 described above
Is fixed to a turntable 30 having a bearing 30a so as to be rotatable about an axis parallel to the pivot of the door 13. Therefore, the linear motor 25 is attached to the top plate of the housing of the bus box 24 so as to be rotatable about the axis AA described above. One end of the rack of the linear motor 25 is pivotally attached to the upper end of the door 13. In this example, since it is attached to the existing switchboard 12, a pillar 31 made of a rectangular steel pipe is fixed to the front surface of the door 13 by screws 32 and 33, and the tip of the rack 28 is pivotally attached to the upper portion of the pillar 31 by a pin 34. In this example, the support column 31 is formed of a square steel pipe, but the support column may be formed of angle steel or a channel.

In this example, the size of the door of the switchboard 12 is approximately the height.
2300mm, width is about 300mm, and it is made of iron plate with thickness of 2 ~ 3mm.The reversible motor 26 of the linearized motor 25 is the output of 25W without electromagnetic brake, and the total length of the rack 28 is about 500mm. , Its reciprocating range is 400 mm, and the moving speed is 20 mm / sec. This is an example,
For example, a linearized motor with a limit switch and a speed-controlled linearized motor can be used.

Now, it is assumed that the door 13 of the switchboard 12 is closed and a command to image the inside of the switchboard by the television camera 14 shown in FIG. 1 is transmitted from the monitoring center. In this state, the rack 28 of the linear motor 25 is at the uppermost position when viewed from the front view of FIG. When the reversible motor 26 is driven in one direction by the command, the rack 28 moves downward in FIG. Therefore, the door 13 has the hinge 21 and
It will rotate around 22 pivots. In this case, the linear motor 25 as a whole also rotates clockwise in the plane of FIG. 3, and the relative angle between the door 13 and the rack 28 also changes. Therefore, almost no undesired stress acts on the door 13 and the rack 28, and the door opens smoothly.
As shown in FIG. 4, when the door 13 is opened at an angle of about 90 degrees, the reversible motor 26 is de-energized and the door is held at this position. In this state, the television camera 14 can capture an image of the inside of the switchboard 12, transmit an image signal to the monitoring center, and an image can be displayed and monitored in the monitoring center.

When the monitoring at the monitoring center is completed, a command to close the door 13 of the switchboard 12 is transmitted. In response to this command, the reversible motor 26 is driven in the reverse direction so that the rack is moved upward in the plan view of FIG. This rack
In response to the movement of 28, the door 13 rotates counterclockwise about the pivots of the hinges 21 and 22, and the door 13 can be closed as shown in FIG. Even during the rotation of the door 13, the linear motor 25 rotates with respect to the rotation base 30 attached to the top plate of the housing of the bus box, and the pin 34 is provided between the door 13 and the rack 28. Therefore, the door is relatively rotated, and no excessive force is applied to the door.

The present invention is not limited to the above-described embodiments, but various modifications and variations are possible. For example, in the above-mentioned embodiment, the switchboard is provided with a single-opening door,
Although this is automatically opened and closed, a double door is provided when the width of the switchboard is long, and the device of the present invention is configured to automatically open and close these left and right doors. You can also Further, in the above-described embodiment, the linear motor is mounted on the top plate of the casing of the switchboard, but if the interior of the casing has a spatial margin, it may be arranged inside the casing. it can. Furthermore, although the door of the switchboard is opened and closed in the above-described embodiment, the rectifier, the inverter,
The device of the present invention can also be applied to automatically open and close the doors of power supply devices such as converters and signal power supplies.

As described above, FIGS. 5 to 7 show an embodiment of the automatic door opening / closing apparatus according to the present invention in which the double door is opened and closed by the linear motor arranged inside the housing. FIG. 5 is a plan view showing the top plate of the housing, FIG. 6 is a front view showing the door, and FIG. 7 is a plan view showing the top plate with the door open. In these drawings, the same parts as those in the above-described embodiment are indicated by the same reference numerals with reference numerals L and R corresponding to the left and right doors. The angle member 41L and the side plate of the casing 12 of the switchboard 11
Mounting plates 42L and 42R are fixed via 41R, and rotary bases 30L and 30R having bearings are fixed to these mounting plates, respectively, and mounting plates 29L and 25R of lineare motors 25L and 25R are fixed to these rotary bases. Install 29R. Racks 28L and 28 of these linearized motors 25L and 25R
One end of R is pivotally attached to the left and right doors 13L and 13R via pins 34L and 34R.

Also in this example, the left and right doors 13L and 13L are driven by driving the linear motors 25L and 25R.
R can be opened and closed automatically, in which case the linear motor can rotate relative to the mounting plates 42L and 42R fixed to the housing 12 and the racks 28L and 28R.
Since one end of is pivoted to each door 13L and 13R,
There is no excessive force when opening and closing the door, and the door can be opened and closed smoothly with a small amount of force. In this case, it is preferable to open and close the left and right doors 13L and 13R at the same time, but it is not always necessary to have such a configuration, and they may be opened and closed separately.

[0020]

As described above, according to the automatic door opening / closing device for a power supply device of the present invention, a linearized motor in which a drive shaft of a reversible motor is connected to a rack that linearly reciprocates via a rack and pinion. , Which is rotatably attached to the casing of the power supply unit and one end of the rack is pivotally attached to the door, and the reversible motor is driven in one direction and the other direction to reciprocate the rack to open and close the door. Therefore, since the rack and the door are not unduly stressed by opening and closing the door, the door can be smoothly opened and closed with a small driving force. Therefore, the reversible motor can be made small and inexpensive. Further, since there is no need to perform any processing on the pivot of the door, there is an advantage that it can be applied to an existing power supply device as it is.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a switchboard to which an automatic door opening / closing device according to the present invention is applied.

FIG. 2 is a front view showing an embodiment of an automatic door opening / closing device according to the present invention with the door closed.

FIG. 3 is a plan view showing a state in which the door is also closed.

FIG. 4 is a plan view showing a state in which a door is opened.

FIG. 5 is a plan view showing another embodiment of the door opening / closing device according to the present invention with the left and right doors closed, with the top plate removed.

FIG. 6 is a front view showing a state in which the door is closed, with the door removed.

FIG. 7 is a plan view showing a state in which the left and right doors are opened with the top plate removed.

[Explanation of symbols]

 11 Building of unmanned building 12 Switchboard 13 Door 14 TV camera 15 Pan / tilt pan head 21, 22 Hinge 23 Enclosure 24 Busbar box 25 Linear motor 26 Reversible motor 27 Linear head 28 Rack 29 Mounting base 30 Rotating base 30a Bearing 31 Strut 32, 33 Screw 34 pin 25L, 25R Linear motor 26L, 26R Reversible motor 27L, 27R Linear head 28L, 28R Rack 29L, 29R Mounting base 30L, 30R Rotating base 41L, 41R Angle member 42L, 42R Mounting plate

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoshitaka Konya 1-34, Roppongi, Minato-ku, Tokyo Within NTT Ftities (72) Inventor Hideo Nagano 5-chome, Nishigotanda, Shinagawa-ku, Tokyo 7-5 Koyo Electric Co., Ltd. (72) Inventor Shigeru Sasaki 5-7-5 Nishigotanda, Shinagawa-ku, Tokyo Koyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A device for automatically opening and closing a single-opening or double-opening door provided in a power supply device, wherein a fixed member to which a pivot shaft of the door is fixed is linearly connected to a drive shaft of a reversible motor via a pinion. A linear motor that is connected to a rod-shaped rack that reciprocally moves, is attached via a rotary base that is rotatable around an axis parallel to the pivot axis of the door, and one end of the rack is pivotally attached to the door. Then, the reversible motor is driven in one direction to move the rack in one direction to open the door, and the reversible motor is driven in the opposite direction to move the rack in the opposite direction to close the door. Automatic opening / closing device for power supply device doors.