JPS62148788A - Safety apparatus of electromotive opening and closing apparatus - 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 an electric opening/closing device for driving an opening/closing door using an electric motor, there is one described, for example, in Japanese Patent Application Laid-open No. 108485/1985. In this device, a shutter main body serving as an opening/closing door can be driven to open and close by an electric motor, and the opening and closing of the shutter main body is automated. Also,
Normally, the driving of the electric motor, that is, the driving of the opening/closing door, is performed through the operation of an opening/closing switch provided on an operation panel or the like.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional electric opening/closing device, when opening/closing the door by operating the opening/closing switch, for example, when the door is driven to be opened/closed, objects or bodies may come into contact with the door. Some of them collide,
The foreign objects that collide with each other may continue to be strongly pressed under the action of the driving force of the electric motor, leading to damage. In order to prevent this, it is possible to install a safety device that detects the collision of this foreign object and controls the electric motor to stop, but in the unlikely event that an abnormality occurs in this safety device, the safety device will be activated. The sense of security that there is can lead to even bigger accidents.

The object of the present invention is to drive the opening/closing door in a double manner to open and close it safely.

[Means for Solving the Problems] The present invention is a safety device for an electric opening/closing device that drives an opening/closing door by an electric motor, and detects a collision of a foreign object with the tip of the opening/closing door, thereby generating a collision signal. a collision signal generation circuit that outputs a test signal, and a test means that outputs a test signal from the collision signal generation circuit during a test period determined at an initial stage when the door closes from an open state;
The apparatus further includes an opening/closing control section that controls the electric motor to stop when the test signal is not received during the test period and when a collision signal is received outside the test period.

[Function] According to the present invention, when a foreign object (for example, a hand, foot, head) collides with the tip of the opening/closing door outside the test period, the collision signal generation circuit detects this and outputs a collision signal, The opening/closing control section controls the electric motor to stop. Thereby, even after the collision, the driving force F of the electric motor does not continue to strongly press the foreign objects.

In addition, a test means is provided to check that the collision signal generation circuit is working properly when the door is closed from the open state. If so, no test signal is generated during the test period, and the opening/closing control section controls the electric motor to stop. As a result, the door will not open under conditions where the collision signal generation circuit is out of order, and there is no risk of an accident in which the door presses a foreign object.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram of an electric switchgear to which the present invention is applied;
2 is a front view of the shutter main body taken along line II--II in FIG. 1, and FIG. 3 is a circuit diagram showing a collision detection means.

In Fig. 1, l is an electric shutter, and 2 is a shutter body (opening/closing door) consisting of an electric shutter shutter. It is attached so as to be wound up on the winding shaft 5, and is configured to move up and down in the vertical direction while being guided by guide rails 6.6 disposed on both sides. The winding shaft 5 is driven by an electric motor 9 via a chain wheel 7 and a chain 78.

A shutter closing detection switch 10 (for example, a limit switch) is turned on by a driver 11 fixed to the shutter body 2 when the shutter body 2 is completely closed, and sends out a shutter closing detection signal LC. Reference numeral 12 denotes a shutter open detection switch (for example, a limit switch), which is turned on by a driver 13 fixed to the shutter body 2 when the shutter body 2 is fully opened, and sends out a shutter open detection signal LO.

Reference numeral 14 denotes a hand-held operation unit, which is provided inside the chamber in which the shutter main body 2 is provided, and includes a close pushbutton switch 14C, an open pushbutton switch 140, a stop pushbutton switch 14S, and a close pushbutton switch 14C. When the switch 14C is pressed, the shutter close command signal C is sent, when the open button switch 140 is pressed, the shutter open command signal ○ is sent, and when the stop button switch 14S is pressed, the shutter stop command signal S is sent to control the opening and closing of the shutter. 20.

Reference numeral 15 denotes a remote control panel section, which is provided in a separate room apart from the above room, and includes - remote control push button switches 16 and two status indicator lamps, namely a closed indicator lamp 17G and an open indicator lamp. An indicator lamp 170 is provided.

The remote control pushbutton switch 16 supplies the closing output generated by its closing to the shunter opening/closing control section 20.

The shutter opening/closing control section 20 is constituted by a microcomputer, and is shown in functional blocks in the figure. In the shutter opening/closing control section 20, the shutter close command signal C is guided to a forward rotation command circuit section 21, and the shutter open command signal O is guided to a reverse rotation command circuit section 22.

When the forward rotation command circuit section 21 receives the shunter closing command signal C, it sends a forward rotation command signal to the drive circuit section 30 of the electric motor 9, and when it receives the shunter closing detection signal LC, it sends out a forward rotation stop command signal 6 When the drive circuit unit 30 receives this forward rotation command signal, the drive circuit unit 30 outputs the electric motor 9 from the AC power source 31.
On the other hand, a driving current 1a for normal rotation is supplied. The drive current ia is supplied through the supply line 32a.
It is done through. Drive for electric motor 9? if
When the flow ia is supplied, the shunter main body 2 is driven in the lowering direction. On the other hand, the drive circuit section 30 rotates out of the normal direction.
b Upon receiving the command signal, the drive circuit 30 starts the electric motor 9.
This results in cutting off the supply of drive current ia to. When the supply of the drive type IJLia is cut off, the electric motor 9 is immediately stopped.

On the other hand, the reverse rotation command circuit section 22 outputs a shutter open command signal O.
When receiving the shutter open detection signal LC, it sends out a reverse rotation command signal to the drive circuit section 30 of the drive motor 9, and when it receives the shutter open detection signal LC, it sends out a reverse rotation stop command signal. When the drive circuit unit 30 receives this reverse rotation command signal, it supplies the electric motor 9 with a drive current ib for performing reverse rotation from the AC power supply 31. The drive current ib is supplied via the supply line 32b. 'When the drive type 11 i b is supplied to the drive motor 9, the shunter main body 2 is driven in the winding direction. On the other hand, when the drive circuit section 30 receives the reverse rotation stop command signal, the drive circuit section 30 cuts off the supply of the drive current ib to the electric motor 9. When the supply of drive current ib is cut off, electric motor 9 immediately stops.

Further, a forward rotation command circuit section 21 and a reverse rotation command circuit section 22
further receives a shutter stop command signal S, and upon receiving this signal S generates a forward rotation stop signal and a reverse rotation stop command signal, respectively. Thereby, the drive circuit section 30 can cut off the supply of the drive TF, flow ia, or ib to the electric motor 9.

The shutter opening/closing control section 20 further includes a state monitoring section 23
have. The state monitoring unit 23 includes a first determination unit 23A.
, a second determination section 23B, and a third determination section 23C. When the first determination unit 23A receives the closing output of the remote control pushbutton switch 16 while the output of the shunter open detection switch LO is guided and the shutter open detection signal LO is input, the first determination unit 23A determines whether the forward rotation command circuit A shunter closing command signal C is sent to the section 21. When the second determination unit 23B receives the closing output of the remote control pushbutton switch 16 with the output of the shutter closing detection switch 12 being guided and the shunter closing detection signal LC being input, the second determination unit 23B determines whether the reverse rotation command circuit A shank-opening command signal O is sent to the section 22. When the third determination unit 23C receives the closing output of the remote control pushbutton switch 16 in a state where neither the shunter close detection signal LC nor the shunter open detection signal LO is generated, the forward rotation command circuit unit 21 and the reverse rotation command Circuit section 22
supplies the shunter stop command signal S to the forward rotation command circuit section 21 and the reverse rotation command circuit section 22 on the condition that the output command signals are respectively outputting a forward rotation command signal and a reverse rotation command signal, and the forward rotation command circuit section The shunter closing command signal C is supplied to the forward rotation command circuit section 21 under two conditions that both the rotation command circuit section 21 and the reverse rotation command circuit section 22 are not outputting.

The shutter opening/closing control section 20 further includes a lamp lighting control section 24 . This lamp lighting control section 24 is
It includes a static lighting circuit 25, a slow flickering lighting circuit 26, and a normal flickering lighting circuit 27.

The static lighting circuit 25 is guided by the shutter closed detection signal LC and the shunter open detection signal LO, and when the former is input, the image display lamp 170 is statically illuminated, and when the latter is input, the image display lamp 170 is statically illuminated. Turn it on.

The slow flicker lighting circuit 25 is connected to the forward rotation command circuit section 21
A forward rotation command signal outputted by the circuit 22 and a reverse rotation command signal outputted from the reverse rotation command circuit 22 are guided, and when the former is input, the screen display lamp 17C is slowly flickered, and when the latter is input, the screen is turned off. The display lamp 170 is slowly flickered on.

Further, the normal lighting circuit 27 can be inputted with the alarm signal R sent from the alarm output section 33, and when the alarm signal R is input from the output section 33, the closed indicator lamp 17C and the open indicator lamp 170 are turned on. Turn on the flicker.

Therefore, this electric shutter 1 has a safety device as described below.

That is, the width direction (X
A pressure-sensitive switch 34 is provided in substantially the entire area in the direction). This pressure-sensitive switch 34 includes a power supply 35, a signal generation section 3
Together with 6, it is possible to form a closed circuit. Signal generator 3
6 outputs a collision signal FO when the pressure sensitive switch 34 is closed. The pressure-sensitive switch 34 may be closed when a foreign object, such as a hand or foot, collides with the pressure-sensitive switch 34 when the shutter main body 2 is driven to wind up or down. The collision signal FO is transmitted to the light emitting unit 3.
The zero light emitting section 37 inputted to the shutter main body 2 is disposed at one end in the width direction of the shutter main body 2 . Further, a light receiving section 38 facing the light emitting section 37 is installed on the floor below the shutter main body 2 . The light emitting unit 37 emits sensor light 39 in response to the collision signal FO, and the light receiving unit 38 that receives the sensor light 39 activates the safety detection unit 38A and outputs the collision signal F1 to the determination unit 40. The above pressure sensitive switch 34, electric rX35
, the signal generating section 36, the light emitting section 37, the light receiving section 38, and the safety detecting section 38A constitute a collision signal generating circuit of the present invention.

On the other hand, a test switch 41 is provided on the front end side of the shutter body 2. Outside this test period・2chi4
1 is determined when the shutter passes in front of the magnet 42 connected in parallel to the pressure-sensitive switch 34 and fixed to the shutter case 4, that is, at the initial stage when the shutter main body 2 moves from a fully open state to a closed state. During the test period, it is brought into a closed state by the electromagnetic action of the magnet 42, causing the signal generator 36 to output the test signal To. When the test signal TO is input to the light emitting section 37, the light emitting section 37 emits the sensor light 39, and the light receiving section 38 that receives this sensor light 39 activates the safety detection section 38A to send the test signal to the determination section 40. Output T1.

The determination unit 40 determines the collision signal F1 and the test signal T1 as follows. That is, 43 is a timer control section, which turns on a timer 44 when the shutter main body 2 starts to come out from the shutter case 4 in response to a shutter open detection signal from the shutter open detection switch 12. The timer 44 is activated by the timer control section 43, sends a signal K to the determination section 40 during the test period (for example, 4 seconds), and is reset after the test period has elapsed. As a result, the determination unit 40 determines that the period during which the signal K is transmitted from the timer 44 is during the test period. The determination unit 40 determines whether the safety detection unit 3
If a signal is transmitted from 8A, this signal is used as the test signal T1.
If it is determined that there is a failure in the collision signal generation circuit and no signal is transmitted from the safety detection section 38A during the test period, the alarm output section 33 is activated. , outputs an alarm signal R from the alarm output section 33. Further, if a signal is transmitted from the safety detection section 38A outside the test period, the determination section 40 determines the signal as a collision signal F1, activates the alarm output section 33, and outputs an alarm signal from the alarm output section 33. Output R.

Examples of failures in the collision signal generation circuit include disconnection of electrical wiring constituting the collision signal generation circuit, malfunction of the power source 35, signal generation section 36, light emitting section 37, light receiving section 38, and safety detection section 38A. .

In this way, the alarm signal R output from the alarm output section 33 is sent to the normal lighting circuit 27 as described above.

As a result, the two display lamps 17C and 170 are flickered to alert the user. As a result, the user can detect that a foreign object, such as a limb of a person near the shutter body 2, has collided with the shutter body 2 by the flickering.

The above-mentioned alarm signal R is also sent to the forward rotation command circuit section 21 and the reverse rotation command circuit section 22, of which the circuit section 21 issues a forward rotation stop F command signal based on the signal R.
Further, the circuit section 22 is configured to send a reverse rotation stop command signal to the drive circuit section 30 based on the signal R. As a result, the operation of the electric motor 9 is stopped, and the closing or opening drive of the shutter body 2 is immediately stopped. In addition, after receiving the above-mentioned warning signal R, the rotation direction of the electric motor 9 is operated in the opposite direction to that before the collision detection,
It may also be possible to reliably release the contact state and the pinched state of the foreign object caused by the opening/closing door. Furthermore, the above alarm signal R
is also sent to the melody generation circuit 46. The melody generation circuit 46 is formed by a digital IC, and when the collision detection signal R is input, the circuit 46 outputs an audio output signal M to a speaker 47 installed at the same location as the operation panel section 15. It is possible. The speaker 47 is capable of generating a melody based on the audio output signal M to alert the user.

In this configuration, the opening/closing state of the shutter main body 2 and the collision state of foreign matter against the shutter main body 2 can be checked by the image display lamp 170 of the remote control panel 15 and Display lamp 1
7C is lit or not and the flicker lighting mode. For example, at night, the image display lamp 170 is lit statically (since the shutter body 2 is completely open). If you want to close the shutter, turn on the remote control pushbutton switch 16, and the first determination section 23A will generate the shutter closing command signal C, so the drive circuit section 30 will supply the drive current ia to the electric motor 9. The shutter body 2 is lowered, and the image display lamp 17C flickers slowly until it is completely lowered. If it becomes necessary to stop the closing operation of the shutter body 2 during this lowering, use the same remote control pushbutton switch.
When the third determination unit 23C generates a shutter stop command signal S, the electric motor 9 stops rotating and the lowering operation of the shutter body 2 is stopped. Also, at night, the image display lamp 17C and the image display lamp 17
0 are both off (since the shutter and main body 2 are half open), if you want to close the shutter and main body 2,
All you have to do is turn on the remote control pushbutton switch 16.For example, in the daytime, if you notice that the shutter body 2 is closed because the image display lamp 17c is still lit, you can turn on the shutter body 2. If you want to open the second determination unit 2, press the remote control pushbutton switch 16.
3B generates the shutter open command signal O, so rtt
The moving motor 9 rotates in the reverse direction to start winding up the shutter body 2, and the image display lamp 170 slowly flickers on. Furthermore, when the alarm signal R is input from the alarm output section 33, the opening/closing drive of the shutter body 2 is stopped, and the image display lamp 17G or the image display lamp 170 flickers. You can go to the installation location and check the collision status of foreign objects.

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

According to the above embodiment, if a foreign object collides with the tip of the shutter body 2 outside the test period, the collision signal generation circuit detects this and outputs a collision signal, and the alarm output section outputs an alarm signal. Since the opening/closing control section operated by this controls the electric motor 9 to stop, the foreign objects will not continue to be strongly pressed under the driving force of the electric motor 9 even after the collision.

Further, a test means is provided to check that the collision signal generation circuit works normally each time the shutter body 2 is closed from the fully open state. If there is a failure in that part, no test signal is generated during the test period, the alarm output section outputs an alarm signal, and the opening/closing control section activated by this output controls the electric motor 9 to stop. Thereby, under a condition where the collision signal generation circuit is out of order, the shutter body 2 does not move and there is no risk of an accident in which it presses against a foreign object.

In the practice of the present invention, means for pushing the pressure-sensitive switch 34 during the test period is provided in the shutter case 4 as a test means, and the entire collision signal generation circuit including the operating state of the pressure-sensitive switch 4 is It may also be used to check the operating status of the

Note that the present invention is also applicable to electric blinds, electric shutters, etc. driven by an electric motor.

Furthermore, the present invention is also applicable to a telecontrol device in which the remote control panel 15 is a telephone.

[Effects of the Invention] As described above, the present invention is a safety device for an electric opening/closing device that drives an opening/closing door by an electric motor, and generates a collision signal by detecting a collision of a foreign object with the tip of the opening/closing door. a collision signal generation circuit for outputting a collision signal, a test means for outputting a test signal from the collision signal generation circuit during a test period determined at an initial stage in which the door closes from an open state, and a test means for outputting a test signal from the collision signal generation circuit; When no signal is received, and when a collision signal is received outside the above test period,
The opening/closing control section controls the stopping of the electric motor. Therefore, it is possible to safely open and close the door in a double manner.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an electric switchgear according to an embodiment of the present invention, Fig. 2 is a front view of the shunter body taken along line II-II in Fig. 1, and Fig. 3 shows a collision signal generation circuit. FIG. l... Electric shutter, 2... Shutter body (opening/closing door), 9... Electric motor, 20... Shutter opening/closing control section, 34... Pressure sensitive switch, 35... Power supply,
36... Signal generation section, 37... Light emitting section, 38...
Light receiving part, 38A...Safety detection part, (35~38A...
・Collision signal generation circuit), 40...determination section, 41...
test switch. FO, Fl... Collision signal, TO, Tl... Test signal. Patent applicant: Sekisui Chemical Co., Ltd. Representative Hiroshi 1) 6

Claims (1)

[Claims] (1) A safety device for an electric opening/closing device that drives an opening/closing door by an electric motor, which includes a collision signal generation circuit that outputs a collision signal by detecting a collision of a foreign object with the tip of the opening/closing door, and A test means for outputting a test signal from the collision signal generation circuit during a test period determined on the initial stage side of the closing operation from the open state, and a test means for outputting a test signal from the collision signal generation circuit when the test signal is not received during the test period and outside the test period. 1. A safety device for an electric switchgear, comprising an opening/closing control section that controls an electric motor to stop when a collision signal is received.