JPS62185993A - Safety device for electric switchgear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a safety device for an electric switchgear.

[Prior Art] Conventionally, as described in Japanese Patent Application Laid-Open No. 5111-108485, a pressure-sensitive switch, a transmitter, and a battery are provided at the bottom of the shutter as a safety device for an electric shutter, and an activation signal of the pressure-sensitive switch is provided. has been proposed to control the stop of an electric motor.

In other words, in the above safety device, when a foreign object collides with the lower part of the shutter while it is lowering and the pressure-sensitive switch is activated, the transmitter transmits a collision detection signal to the electric motor and stops the electric motor, thereby preventing the collision. The aim is to prevent accidents in which a foreign object, such as a human body, is continuously pressed strongly.

[Problems to be Solved by the Invention] However, in the conventional electric shutter safety device proposed above, it is necessary to provide a pressure-sensitive switch, a transmitter, and a battery at the bottom of the shutter, and it is necessary to provide the output signal of the transmitter. A means for transmitting the information to the control section of the electric motor is required, making the overall structure complicated.

In addition, when installing a safety device against collision with foreign objects as described above in an electric opening/closing device such as an electric shutter,
It is necessary to reduce as much as possible the pressing force of the opening/closing door that acts on a foreign object, such as a human body, after a collision.

With a simple structure, the present invention reduces the pressing force of the door against the foreign object as much as possible when a foreign object collides with the door, and reliably prevents the occurrence of an accident in which the door continues to strongly press the foreign object that has collided with it. The purpose is to make it possible.

[Means for Solving the Problems] The present invention provides a safety device for an electric opening/closing device that drives an opening/closing door by an electric motor, which is provided so as to be relatively movable at the tip of the opening/closing door, and which opens/closes when a foreign object collides with the opening/closing device. a collision actuating body that moves backward in the opening/closing direction of the door; a brake receiver extending along the opening/closing direction on the side of the door; When the foreign object does not collide with the body, it is set at the original position where it does not collide with the brake receiver, and when the foreign object collides with the collision actuating body, it is set at the operating position where it collides with the brake receiver to prevent the door from moving. The motor includes a brake body that performs braking, and a motor stop means that detects an overload operating state of the electric motor and stops the electric motor.

[Function] According to the present invention, when a foreign object, such as a human body, collides with the tip of the door while the door is being moved by the drive of the electric motor, The collision actuating body moved backward moves, and the braking body that is linked to the above-mentioned backward movement of the collision actuating body is switched from the original position to the operating position, and the braking body collides with the brake receiver, and this collision is The movement of the opening/closing door is braked by the braking force based on the resultant force. (2) If an overload exceeding a certain level is applied to the electric motor under the action of the braking force, the motor stopping means will stop the electric motor, and the opening/closing door will come to a complete stop.

That is, according to the present invention, the door is not equipped with an electrically actuated part for detecting the collision of a foreign object and transmitting the detection signal to the electric motor, and a simple structure is used to detect the collision of the foreign object. Stop the door from moving.

Further, according to one aspect of the present invention, the door is braked by the operation of the braking body as the collision actuating body moves backward, which is activated by a slight collision with a foreign object.

That is, according to the present invention, when the door collides with a foreign object, the collision force or pressing force that acts on the foreign object is an extremely slight force that is required to move the collision actuating body backward and hold it in the retreated position. That's enough. At this time, an extremely large braking force is applied to the door due to the collision force between the brake body and the brake receiver, and the electric motor immediately stops under the action of this braking force, releasing the pressing state that the door exerts on the foreign object. It becomes possible to do so.

As a result, according to the present invention, the simple structure reduces the pressing force of the door against the foreign object as much as possible when a foreign object collides with the door, thereby preventing the occurrence of an accident in which the door continues to press the foreign object that has collided with it. It is possible to reliably prevent this.

[Embodiment] Fig. 1 is a partially cutaway front view of an electric switchgear to which an embodiment of the present invention is applied, and Figs. 2 (A) to (C) show main parts of Fig. 1. FIG. 6 is a front view showing different operating states.

In FIG. 1, reference numeral 10 denotes an electric shutter as an electric opening/closing device. Take case 1
2 is provided with an electric motor 14 and a winding shaft 15 rotated by the electric motor 14, and the winding shaft 15 is capable of winding up an opening/closing door 16 made of a slat.

In FIG. 1, 17 is a remote control unit, 18 is a power supply, and 19
is the control section. The remote control unit 17 has an opening operation button 20
, a close operation button 21, an open indicator lamp 20A, and a close indicator lamp 21A. The control unit 19 operates the opening operation button 2
When the opening operation signal of 0 is received, the opening driving current is supplied to the electric motor 14 via the power supply line 22, and when the closing operation signal of the closing operation button 21 is received, the electric motor is supplied via the power supply line 23. −
This makes it possible to supply a closing drive current to the motor 14.

As a result, the electric shutter 10 drives and controls the electric motor 14 by operating the open operation button 20 and the close operation button 21 of the remote control unit 17, thereby enabling the door 16 to be opened and closed. When the opening/closing door 16 is in the opening operation, the close indicator lamp 20A is normally lit, and when the opening/closing door 16 is in the closing operation, the closing indicator lamp 21A is normally lit.

As shown in FIGS. 2(A) to 2(C), the electric shutter lO is connected to a baseboard 24 that constitutes the tip (lower end) of the opening/closing door 16.
is equipped with a collision actuating body 25.

Under normal conditions, the collision actuating body 25 is set at a lowered position relative to the baseboard 24 of the opening/closing door 16 by a coil spring 26 (a leaf spring may be used) as shown in FIG. Now, as shown in Figure 2 (B), baseboard 2
It is guided by guide brackets 27 provided on both sides of the opening/closing door 4, and is movable relative to the opening/closing door 16 in the opening/closing direction of the opening/closing door 16. As a result, the collision actuating body 25
When the door 16 collides with a foreign object, such as a human body, while the door 16 is being lowered, a small collision force P causes the door 16 to move backward in the drawing, which is the opening/closing direction of the door 16.

Further, in the electric shutter 10, as shown in FIGS. 2(A) to 2(C), the inner side surfaces of the left and right guide rails 11 serve as brake receiving portions 28.

Further, as shown in FIGS. 2A to 2C, the electric shutter 10 includes left and right brake bodies 29 at both left and right ends of the baseboard 24 of the door 16. Braking body 29 is spring 3
0 to the baseboard 24, its base end and middle part are brought into contact with the baseboard 24 under normal conditions, and the distal end thereof is provided with a braking part 29A made of rubber or the like. Further, one end of a link 31 is connected to the base end of the brake body 29 through a pin, and the other end of the link 31 is connected through a pin to the collision actuating body 25 . As a result, the left and right braking bodies 29 are connected to the collision actuating body 25.
When a foreign object does not collide with the collision actuating body 25, it is supported by the skirting board 24 in a state in which the foreign object
), the brake part 29A is set at the original position where it does not collide with the brake receiving part 28. On the other hand, when a foreign object collides with the collision actuating body 25, the braking body 29 acts as shown in FIG.
As shown in B), a component of the slight collision force P acting on the collision actuating body 25 is transmitted via the link 31 and moves laterally to the operating position where the brake part 29A collides with the brake receiving part 28. Set.

Further, the electric shutter 10 includes a current detector 32 at an intermediate portion between the power supply line 22 and the power supply line 23, and transmits the detection result to the control unit 19.

The control unit 19 and the current detector 32 constitute a motor stopping/reversing means, which stops and reverses the electric motor 14 when an overload operating state of the electric motor 14 is detected.

Next, the operation of the above embodiment will be explained.

According to the above embodiment, as shown in FIG. 2(A), when the door 16 is being moved by the drive of the electric motor 14, there is a foreign object such as a human body, etc. at the tip of the door 16. When the collision occurs, (1) the collision actuating body 25 provided at the tip of the opening/closing door 16 moves backward by a slight collision force P as shown in FIG. The brake body 29 that is linked to the movement is switched from the original position to the operating position, and the brake part 29A of the brake body 29 collides with the brake receiving part 28, and a braking force R (frictional force) based on this collision force Q is generated. This prevents the door from moving. ■The above braking force H
If an overload exceeding a certain level is applied to the electric motor 14 under the action of Move and stay away from foreign objects. At this time, as shown in FIG. 2(C), the brake body 29 rotates in a direction away from the brake receiver 28 to eliminate the braking state, and the collision actuating body 25 is affected by its own weight and the elastic force of the coil spring 26. The brake body 29 is returned to the initial position from the retracted position by the movement, and the brake body 29 interlocked with this returns to the initial position as shown in FIG.
Return to the original position shown in A). Note that when the motor reversing means detects that an overload of a certain level or more is applied to the electric motor 14 at the time of a collision of the opening/closing door 16, the closing indicator lamp 21 is activated.
A flickers on.

That is, according to the above embodiment, there is no electrically operated part for detecting the collision of a foreign object with the door 16 and transmitting the detection result to the electric motor 14, and the structure is simple.
It becomes possible to detect the collision of a foreign object, stop the movement of the door 16, and further move the door 16 in the opposite direction.

Further, according to the embodiment described above, the opening/closing door 16 is braked by the operation of the brake body 29 accompanying the backward movement of the collision actuating body 25 which is activated by a slight collision with a foreign object.

That is, according to the embodiment described above, when the door 16 collides with the foreign object, the collision force and pressing force acting on the foreign object are extremely small and are only required for the collision actuating body 25 to move backward and maintain it in the backward position. A force is sufficient.

At this time, an extremely large braking force R (frictional force) based on the collision force Q between the braking body 29 and the brake receiver 28 acts on the opening/closing door 16, and the electric motor 14 immediately rotates in reverse under the operation of the braking force R. , it becomes possible to completely release the pressing state that the opening/closing door 16 exerts on the foreign object.

FIGS. 3(A) to 3(D) are schematic diagrams showing modified examples of the brake body actuation mechanism in the present invention. In FIGS. 3(A) to 3(D), 16 is an opening/closing door, 25 is a collision actuating body, and 28 is a brake receiver.

In FIG. 3(A), a brake body 40 that collides with the brake receiving part 28 is rotatably supported on the door 16, and a drive body 41 that is linked to the collision actuating body 25 can be moved linearly to the door 46. 41A is a guide portion of the driving body 41), and this is an example in which the brake body 40 and the driving body 41 are connected by a link 42.

FIG. 3(B) shows that a brake body 50 that abuts against the brake receiver 28 is rotatably supported on the door 16, and a drive body 51 that is interlocked with the collision actuating body 25 is rotatably supported on the door 16. In this example, the braking body 5o and the driving body 51 are connected by a link 52. Note that the drive body 51 has a link 52 connected to an end portion on the opposite side of the brake body 50 with respect to its center of rotation.

FIG. 3(C) shows that a brake body 60 that abuts against the brake receiving part 28 is rotatably supported on the door 16, and a drive body 61 that is interlocked with the collision actuating body 25 is rotatably supported on the door 16. In this example, the braking body 60 and the driving body 61 are connected by a link 62. Note that the drive body 61 has a link 62 connected to an end on the brake body 60 side with respect to its center of rotation.

FIG. 3(D) shows that a brake body 70 that abuts against the brake receiving part 28 is rotatably supported on the door 16, and a drive body 71 that is linked to the collision actuating body 25 can be moved linearly to the door 16. 71A is a guide portion of the driving body 71), and this is an example in which the intermediate portion of the brake body 7o and the end portion of the driving body 71 are directly connected.

FIGS. 4(A) and 4(B) are schematic diagrams showing a modification of the brake receiving portion in the present invention.

The brake receiving portion 80 shown in FIG. 4(A) has a serrated uneven surface on the surface with which the brake body abuts, thereby enabling reliable braking.

The brake receiving part 90 shown in FIG. This enables reliable braking.

Note that the present invention is also applicable to electric blinds, electric shutters, and the like.

Furthermore, the present invention is also applicable to a telecontrol system in which the remote control section 17 is configured by a telephone.

[Effects of the Invention] As described above, the present invention provides a safety device for an electric opening/closing device that drives the opening/closing door by an electric motor. a collision actuating body that moves backward in the opening/closing direction of the door; and a brake receiving part extending at a position along the opening/closing direction of the opening/closing door.
It is supported by an opening/closing door so as to be able to interlock with the collision-actuating body, and is set in its original position so that it does not collide with the brake receiver when a foreign object does not collide with the collision-actuating body, and when the foreign object collides with the collision-actuating body, the brake receiver is a braking body that is set in an operating position that abuts against the door and brakes movement of the opening/closing door, and a motor stopping means that detects an overload operating state of the electric motor and stops the electric motor. This is what I did.

Therefore, according to the present invention, with a simple structure, when a foreign object collides with the door, the pressing force of the door against the foreign object is reduced as much as possible, thereby preventing the occurrence of an accident in which the door continues to press the foreign object that has collided with it. This makes it possible to reliably prevent this.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of an electric switchgear to which an embodiment of the present invention is applied, and Figs. 2 (A) to (C) show different operating states of the main parts of Fig. 1. Front view shown in Figure 3 (
A) to (D) are schematic diagrams showing modified examples of the brake body actuation mechanism in the present invention, and FIGS. 4(A) and CB) are schematic diagrams showing modified examples of the brake receiver in the present invention. 10... Electric shutter, 14... Electric motor, 1
9... Control unit, 25... Collision actuating body, 28... Brake receiver. 29... Braking body, 32... Current detector (motor stop/stop means), 40.50.60.70... Braking body, 80
．． 90... Brake receiver. Figure 1 Figure 2 (A) Figure 2 (B) Figure 20 (C) Figure 30 (A) Figure 3 (B) Figure 3 (C) Figure 3 (D)

Claims (1)

[Claims] (1) In a safety device for an electric opening/closing device in which a door is driven to open and close by an electric motor, a collision actuating body is provided in a relatively movable manner at the tip of the door and moves backward in the opening/closing direction of the door when a foreign object collides with the door. and a brake receiver extending along the opening/closing direction on the side of the door, which is supported by the door so as to be interlocked with the collision actuating body, and when a foreign object does not collide with the collision actuating body, the brake receiver A brake body is set at the original position where no collision occurs, and when a foreign object collides with the collision body, the brake body is set at an operating position where it collides with the brake receiver to brake the movement of the opening/closing door, and an overload on the electric motor. A safety device for an electric switchgear, comprising a motor stopping means for detecting an operating state and stopping the electric motor.