JPS5815585Y2 - Door stop control device for automatic door equipment - Google Patents

Description

[Detailed description of the invention] The present invention is a door stop control device for an automatic door device, more specifically, a door stop control device for an automatic door device, in order to automatically stop the door in the open position and the closed position as required. This invention relates to a door stop control device that controls an electric motor for opening and closing a door.

In automatic door devices, for example, when a mat-type switch is pressed, an electric motor for opening and closing the door starts rotating in a predetermined direction, and the action of the electric motor causes the door to close from the open position. The door is then moved towards the open position and automatically stops when the door is in the open position.

After a certain amount of time has elapsed, the door stopped at the open position is moved from the open position to the closed position by causing the electric motor to start rotating in the opposite direction to the predetermined direction using an appropriate means such as a timer. When moved again and in the open position, the door is automatically stopped.

By the way, if a door that is moving from the closed position to the open position or from the open position to the closed position is moved to the open or closed position while maintaining the normal movement speed, the door will not move to the closed or open position. The door may slam into the door stop or door sill at certain points, which may adversely affect the various components of the automatic door system, and may also prevent the door from properly stopping in the open or closed position. It becomes possible.

Therefore, as is well known to those skilled in the art, when automatically stopping a door in the open or closed position, the door is decelerated or temporarily stopped slightly before the open or closed position, and then the door is stopped automatically. It is necessary to slowly move the valve to the open or closed position.

Therefore, in conventional automatic door devices, one or two magnets or limits are installed either directly on the door itself or on an appropriate member that moves in conjunction with the opening/closing movement of the door. When the switch actuator is attached, a proximity switch or When the limit switch is installed and the door is near the open position or near the closed position, the magnet or the limit switch actuator acts on the proximity switch or the limit switch to generate an electric signal, and the electric signal is generated. The electric motor is controlled by an appropriate control circuit that receives the signal, and when the door approaches the open position or the closed position, the door is decelerated or temporarily stopped, and then the door is slowly moved to the open or closed position. Ta.

However, a door stop control device in a conventional automatic door device that is composed of a magnet or limit switch actuator, a proximity switch or limit switch, and a control circuit as described above includes a magnet or limit switch, a proximity switch or limit switch, and a control circuit. can only detect when the door is a predetermined distance before the open or closed position, and cannot detect changes in the door position relative to the open or closed position. Due to this, there is a drawback that the control circuit for controlling the electric motor becomes considerably complicated and expensive, including a timer and the like.

That is, when the control circuit of a conventional door stop control device receives an electrical signal from a proximity switch or a limit switch, it first decelerates or stops the rotation of the electric motor, decelerates or temporarily stops the door, and then operates the door at a predetermined speed. It is necessary to control the electric motor so that the electric motor rotates at low speed for a period of time, slowly moves the door to the open or closed position, and then stops at the open or closed position. Since it is impossible to control the electric motor based on the position of the door after receiving the electrical signal, it is necessary to control the electric motor based on time using a timer, etc. However, despite being complex and expensive, it is extremely difficult to accurately stop the door in a predetermined open or closed position.

On the other hand, if one or more additional proximity switches or limit switches are provided that are activated when the door is slowly moved from near the open position or close position to the open or closed position, a timer etc. The configuration of the control circuit itself can be simplified by omitting this element, but this also reduces the cost of the entire door stop control device due to the need for an additional proximity switch or limit switch. It is not possible to control the electric motor as desired in response to changes in the position of the door, and unless a significant number of proximity switches or limit switches are provided.

The present invention has been developed in view of the above facts, and its main purpose is to eliminate the need for complex and expensive control circuits, and also to eliminate the need for additional proximity switches or limit switches. A new and superior door for an automatic door device that can control the electric motor for opening and closing the door as desired and stop the door at the open and closed positions as desired without having to do so. An object of the present invention is to provide a stop control device.

As a result of extensive research, the inventor of the present invention has developed a new technology that replaces the combination of a magnet or a lever/mitswitch actuator and a proximity switch or limit switch used in conventional door stop control devices.
By using a combination with a magnetic sensing element, which is known per se, and whose output voltage changes depending on the strength of the magnetic field acting on the magnet,
Electric motors for opening and closing the door as desired in response to changes in the position of the door relative to the open and closed positions, without the need for complex and expensive control circuits or additional proximity or limit switches. It has been found that the door can be stopped in the open position and the closed position as desired by controlling the door.

That is, according to the present invention, there is a first element that is moved in relation to the opening and closing movement of the door, and a first element that is mounted in a position that cooperates with the first element when the iron door is near the open position or near the closed position. In the door stop control device for an automatic door device, the first element and the second element are composed of a magnet, and the other is composed of a magnetic field. It is composed of a magnetically sensitive element whose output voltage changes depending on the strength of the iron door. A door stop control device is provided, which is characterized by being provided with a control circuit that reduces the rotational speed of an electric motor for opening and closing operations stepwise or gradually.

In the door stop control device of the present invention, when the door is close to the open position or close to the closed position, the magnetic field from the magnet begins to act on the magnetically sensitive element, and an output voltage is generated in the magnetically sensitive element.

The output voltage of the magnetically sensitive element, which may be a Hall element or a magnetic diode, for example, is proportional to the strength of the magnetic field and thus inversely proportional to the square of the distance between the magnetically sensitive element and the magnet.

Therefore, the output voltage of the magnetically sensitive element changes depending on the position of the door relative to the open or closed position.

The control circuit reduces the rotational speed of the electric motor for opening and closing the door stepwise or progressively depending on the output voltage of the magnetically sensitive element and thus depending on the position of the door relative to the open or closed position. , stopping the door in the open or closed position as desired.

A first element that is moved in relation to the opening and closing movement of the door,
It is also possible to consist of a magnetically sensitive element and the second element to be composed of a magnet, but this would require special attention to the wiring associated with the moving magnetically sensitive element, so that the first element Preferably, the second element is composed of a magnet and the second element is composed of a magnetically sensitive element.

The control circuit includes a first comparator for reducing the rotation speed of the electric motor to a predetermined speed when the output voltage of the magnetically sensitive element exceeds the first set voltage; A second comparator for stopping the operation of the electric motor when a second set voltage higher than the first set voltage is exceeded, or the rotational speed of the electric motor is gradually increased as the output voltage of the magnetically sensitive element increases. A device including a speed control circuit for reducing the speed is preferably used.

Hereinafter, a specific example of the door stop control device according to the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIG. 1, in the illustrated automatic door system, a chassis 2 is fixed to a predetermined position of a building, and a door suspension rail (not shown) is formed on the chassis 2, for example. The door wheel attached to the top of door 4 (
(not shown), the door 4 is suspended so as to be able to reciprocate in the directions shown by the arrows A and 2 between the open position shown by the dashed line 4a and the closed position shown by the dashed double dot line 4b. has been done.

Such a door 4 is drivingly connected to an electric motor (not shown) via a transmission mechanism (not shown) well known to those skilled in the art, and is moved between an open position 4a and a closed position 4b by the action of the electric motor. You can move back and forth between the two.

The above-mentioned configuration of the illustrated automatic door device is well known to those skilled in the art, so a detailed explanation thereof will be omitted.

The illustrated embodiment of the door stop control device according to the invention for stopping the door 4 in the open position 4a and the closed position 4b includes a first element consisting of a first member 6 mounted on the upper part of the door 4. and a second one attached to chassis 2 at a predetermined interval.
and a second element composed of a member 8 and a third member 10.

The second member 8 is disposed at a position that aligns with the first member 6 when the door 4 is in the open position 4a, and the third member 10 is
It is arranged at a position that aligns with the first member 6 when the door 4 is in the closed position 4b.

In the illustrated example, the first member 6 is a magnet;
On the other hand, the second member 8 and the third member 10 are magnetically sensitive elements known per se, such as Hall elements or magnetic diodes, whose output voltage varies depending on the strength of the applied magnetic field.

A Hall element or magnetic diode, when acted upon by a magnetic field while being energized with a constant current, produces an output voltage proportional to the strength of this magnetic field.

In the automatic door device as described above, rotation of the electric motor (not shown) in a predetermined direction is started by an appropriate means such as a mud switch (not shown), and the door 4 is closed. When the door 4 starts opening in the direction shown by arrow A from the position 4b toward the open position 4a and moves close to the open position 4a, the magnetic field from the first member, that is, the magnet 6, is transferred to the second member, that is, the magnetically sensitive It begins to act on the element 8 and thus produces an output voltage on the magnetically sensitive element 8 .

By the way, when the magnetically sensitive element 8 is a Hall element or a magnetic diode, the output voltage of the magnetically sensitive element 8 is inversely proportional to the strength of the magnetic field acting on it. is inversely proportional to the square of the distance of
Therefore, when the door 4 moves to the open position 4a after the magnetic field of the magnet 6 begins to act on the magnetic sensing element 8 when the door 4 is near the open position 4a, in response to the change in the position of the door 4 with respect to the open position 4a, It gradually increases as shown by solid line A in FIG.

In FIG. 2, the horizontal axis represents the change in the distance between the magnet 6 and the magnetically sensitive element 8, and the distance between the open position 4a and the actual position of the door 4 increases toward the right. gradually decrease,
At point O, the door 4 is in the open position 4a.

The vertical axis represents the magnitude of the output voltage V of the magnetically sensitive element 8.

Similarly, the electric motor (not shown) starts rotating in the opposite direction to the predetermined direction, and the door 4 is moved to the open position 4.
a to the closed position 4b in the direction shown by the arrow, and when the door 4 moves close to the closed position 4b, the magnetic field by the magnet 6 begins to act on the third member, that is, the magnetically sensitive element 10. , thus an output voltage is generated at the magnetically sensitive element 10.

This output voltage gradually increases as shown by curve A in FIG. 2 as the door 4 approaches the closed position 4b.

The illustrated embodiment of the door stop control device according to the invention is further provided with a control circuit for controlling the electric motor in accordance with the output voltages of the magnetically sensitive elements 8 and 10.

To explain with reference to FIG. 3, a control circuit 14 is connected to the output side of the magnetically sensitive element 8 and the magnetically sensitive element 10 via an amplifier 12, and the output voltage of each is amplified by the amplifier 12. The signal is supplied to the control circuit 14.

By means of an appropriate means (not shown), a constant current is applied to the magnetically sensitive element 8 only when the door 4 opens in the direction indicated by the arrow A, and a constant current is applied to the magnetically sensitive element 10 only when the door 4 opens in the direction indicated by the arrow A. A constant current is applied only when the door 4 moves in the direction shown by arrow A, so that the magnetically sensitive element 8 can generate an output voltage proportional to the strength of the magnetic field acting on it only when the door 4 moves in the direction shown by arrow A. The magnetically sensitive element 10 is adapted to generate an output voltage proportional to the strength of the magnetic field acting on the door 4 only when the door 4 moves in the direction indicated by the arrow.

Alternatively, an appropriate gate means (not shown) may be interposed between the magnetically sensitive elements 8 and 10 and the amplifier 12, so that when the door 4 is opened in the direction of arrow A, the output of the magnetically sensitive element 8 is Only voltage is supplied to the amplifier 12 and the door 4
When the magnetically sensitive element 10 closes in the direction of the arrow, only the output voltage of the magnetically sensitive element 10 may be supplied to the amplifier 12.

Control circuit 14 includes two voltage comparators 16 and 18 connected to the output side of amplifier 12 .

The first comparator 16 generates a signal when the output voltage of the magnetically sensitive element 8 or 10 exceeds a predetermined 41 set voltage V1 (see FIG. 2), for example to reduce the supply voltage to the electric motor. As a result, the rotational speed of the electric motor, and therefore the moving speed of the door 4, is reduced to a predetermined speed.

The second comparator 18 generates a signal when the output voltage of the magnetically sensitive element 8 or 10 exceeds a second set voltage 2 (see FIG. 2) which is higher than the first set voltage Vl, The power supply to the electric motor is stopped to stop driving the door 4 by the electric motor, and after some movement due to inertia, the door 4 is stopped at the open position 4a.

In such a control circuit 14, simply the first comparator 1
By adjusting the setting voltage (1) or (2) of the second comparator 18, the time point at which the moving speed of the door 4 decelerates or the time at which the door 4 stops driving can be changed as appropriate. Therefore, the movement stop control of the door 4 can be adjusted as required very easily.

Also, if desired, a comparator separate from the first comparator 16 or the second comparator 18 may be connected to the amplifier 12 by the signal generated by the first comparator 16 or the second comparator 18. A braking mechanism (not shown) which is connected and, depending on the signal generated by this comparator, acts on the door 4 itself or on appropriate parts of the transmission mechanism (not shown) between the door 4 and the electric motor.
(not shown), thereby making it possible to control the stoppage of the door 4 more reliably.

FIG. 4 shows a modification of the control circuit 14 shown in FIG. 3. In FIG.

Similarly to the control circuit 14 of FIG. 3, the control circuit 20 of FIG. The rotational speed of the electric motor is changed in accordance with the magnitude of the output voltage of the magnetically sensitive element 8 or 10, and the rotational speed of the electric motor is approximately inversely proportional to the output voltage of the magnetically sensitive element 8 or 10, as shown by the two-dot chain line "B" in FIG. It consists of a speed control circuit that controls the speed so that it gradually decreases.

The configuration of the control circuit 20 itself may be of a well-known form as can be easily understood by those skilled in the art, and therefore detailed description thereof will be omitted.

According to such a control circuit 20, it is possible to gradually and smoothly decelerate the moving speed of the door 4 from the normal opening/closing speed to the stop.

Although the illustrated specific examples of the present invention have been described in detail above, the present invention is not limited to these specific examples, and it is understood that various modifications and modifications can be made without departing from the scope of the present invention. , it should be obvious without saying too much.

For example, in the illustrated embodiment, the first element is comprised of a single member or magnet 6, and such single magnet 6 is in turn the second element.
The first element 6 is arranged at a distance so that it acts on both of the two elements constituting the element, namely the magnetically sensitive elements 8 and 10, such as Hall elements or magnetic diodes. It is also possible to configure the magnet with two magnets, one magnet acting on the magnetically sensitive element 8 and the other magnet acting on the magnetically sensitive element 10.

Further, the second element is composed of a single member (magnetic sensing element), the first element is composed of two members (magnets) attached to the door 4 at a distance, and the door 4 is opened. When the door 4 is near the closed position, one member (magnet) of the first element acts on a single member (magnetic sensing element) of the second element, and when the door 4 is near the closed position, the other member of the first element acts on the single member (magnetic sensing element) of the second element. It is also possible to cause the (magnet) to act on a single member (magnetically sensitive element) of the second element.

Further, in the illustrated example, the first element is composed of the magnet 6 and the second element is composed of the magnetically sensitive elements 8 and 10, but conversely, the first element is composed of the magnetically sensitive elements. Similar effects can be achieved even if the second element is composed of a magnet.

However, if the first element that moves with the movement of the door 4 is a magnetically sensitive element, the wiring of the magnetically sensitive element should be adjusted so that the movement of the door 4 does not interfere with the wiring attached to the magnetically sensitive element. It is necessary to pay special attention to.

Furthermore, in the illustrated example, the magnet 6 constituting the first element is attached directly to the door 4 itself so that it can be moved in conjunction with the opening/closing movement of the door 4. It is also possible to attach the magnet 6 constituting the first element to a separate member that is moved in conjunction with the opening/closing movement of the door 4 so that it can be moved in conjunction with the opening/closing movement of the door 4.

Of course, in such a case, the mounting positions of the magnetically sensitive elements 8 and 10 constituting the second element will cooperate with the magnet 6 when the door 4 is near the open position 4a and near the closed position 4b, respectively. 1 is selected for the position.

In addition, when the magnet constituting the first element is attached to a separate member that is linked to the opening and closing movement of the door 4,
It is preferable to use an automatic magnet position setting mechanism as disclosed in Publication No. 3-1802, and to construct the first element from two magnets fixed to each of a pair of actuating arms in the darning mechanism. .

Thus, as explained in detail in the above-mentioned Japanese Utility Model Publication No. 53-1802, when installing an automatic door device, by simply opening and closing the door 4 once, the two magnets constituting the first element and the second The starting position of cooperation with the two magnetically sensitive elements constituting the second element can be automatically set to a desired position.

[Brief explanation of drawings]

FIG. 1 is a simplified diagram of an automatic door device equipped with a specific example of a door stop control device according to the present invention, and FIG. 2 is an output of a magnetically sensitive element due to a change in the actual position of the door with respect to the open or closed position. 3 is a block diagram showing a specific example of the door stop control device according to the present invention; FIG. , a block diagram showing a modification of the door stop control device according to the present invention. 4... Door, 4a... Door open position, 4b
... Door closed position, 6 ... Magnet (first element), 8 and 10 ... Magnetic sensing element (second element), 14 ... ...Control circuit, 16 and 18...
...Voltage comparator, 20... Control circuit (speed control circuit).

Claims (1)

[Scope of utility model registration request] 1. It comprises a first element that is moved in conjunction with the opening and closing movement of the door, and a second element that is mounted at a position that cooperates with the first element when the iron door is near the open position or near the closed position. , in a door stop control device for an automatic door device, one of the first element and the second element is composed of a magnet, and the output voltage of the other changes depending on the strength of the applied magnetic field. Rotation of an electric motor for opening and closing the iron door in response to the output voltage of the magnetically sensitive element generated by the magnetic field of the magnet acting on the magnetically sensitive element. A door stop control device characterized by being provided with a control circuit that reduces the speed stepwise or gradually. 2. The door stop control device according to claim 1, wherein the first element is composed of a magnet and the second element is composed of a magnetically sensitive element. 3. The control circuit includes a first comparator for reducing the rotation speed of the electric motor to a predetermined speed when the output voltage of the magnetically sensitive element exceeds a first set voltage, and an output of the magnetically sensitive element. Claims 1 or 2 include a second comparator for stopping the operation of the electric motor when the voltage exceeds a second set voltage that is higher than the first set voltage. The door stop control device described in Section 2. 4. The control circuit includes a speed control circuit for gradually decreasing the rotational speed of the electric motor as the output voltage of the magnetically sensitive element increases. Door stop control device as described in section.