JPH0448155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic door device used at the entrances and exits of various vehicles and buildings, and particularly to a switch mechanism for automatically opening the door.

(Prior art and its problems) In conventional automatic door devices, a mat switch or an infrared sensor provided on the fixed side detects when a person approaches the door, and the opening/closing driving means is activated in conjunction with this detection operation. The door was activated. With such conventional devices, the door will open when a person enters the detection area of the matsuto switch or infrared sensor, regardless of whether or not the person has the intention to open the door. In a situation where the area around the door is crowded with people, inconveniences occur such as the door opening and closing frequently even though no one is passing by. Therefore, it has been difficult to use it, for example, as an automatic door system between commuter vehicles or as an automatic door system for stores with checkout counters right next to entrances and exits.

In order to eliminate such inconveniences, a door opening switch that can be operated directly or indirectly by a person is provided on the door side, such as a touch switch or a switch that is linked to the handle, and the opening/closing drive means is linked to the operation of this switch. Automatic door devices that operate the door opening operation have also been put into practical use, but in this type of automatic door device, the switch on the door side that moves to open and close and the control circuit on the stationary side that has the opening and closing drive means are electrically connected. In order to make the connection, an electrical path must be provided between the door side and the fixed side using a curled cord or the like that does not interfere with the door's opening/closing movement, and an electrical circuit is also required inside the door, resulting in high costs. Not only that, but it also becomes difficult to maintain and inspect the electric circuit system. Furthermore, the presence of electrical paths that are constantly in motion as the door opens and closes is likely to cause failures and shorten the useful life of the device.

(Means and effects for solving the problems) The present invention proposes an automatic door device that can solve the conventional problems as described above. A light reflecting surface is provided on the upper end of the door body, which is detected by a retroreflective photoelectric switch provided on the fixed side.
Detection of changing the ON/OFF state of the photoelectric switch by blocking the light input reflection path of the light reflection surface or moving the light reflection surface itself in conjunction with the operation of a manual operating tool provided on the door body. A state switching means is provided, and a photoelectric switch for detecting a passerby is provided at a fixed part around the doorway opened and closed by the door body at a position close to the door body. The opening/closing driving means is configured to operate to open the door when the ON/OFF state of the photoelectric switch changes, and the opening/closing driving means is configured not to operate to close the door when the photoelectric switch for detecting a passerby is in the state of detecting a pedestrian. The point is that it is structured as follows.

In this way, in the device of the present invention, the detection state switching means is activated by operating the manual operating tool on the door body side, and either the light input/reflection path to the light reflection surface is blocked or the light reflection surface itself is changed. When moving, turning on the fixed-side retroreflective photoelectric switch,
The OFF state can be switched wirelessly and remotely.
As the ON/OFF state of this photoelectric switch changes, the opening/closing drive means operates to open the door, and the door body automatically opens. While the passerby detection photoelectric switch detects a person passing through the open doorway, the opening/closing driving means does not close the door, and the door remains open.

(Example) An example of the present invention will be described below based on the attached illustrative drawings.

In FIG. 1, reference numeral 1 denotes a sliding door type door body for opening and closing an entrance/exit 2, and is suspended from an upper guide rail 3 via wheels 4 so as to be capable of horizontal opening/closing movement. Reference numeral 5 denotes an opening/closing driving means for driving the door body 1 to open and close, and includes a driving arm 5b that can be swung back and forth within a certain angle range by a rotary driving device 5a of a fluid pressure type or an electric type. The upper end of the drive arm 5b is engaged with a vertical rail 5c attached to the rear side of the door body 1 via a roller 5d. 6 is door body 1
This is a door opening/opening limit switch that detects when the doorway 2 is in the fully open position.

Reference numeral 7 denotes a movable handle provided on the door body 1 that can swing left and right, and is interlocked and connected to the detection state switching means 8. As shown in FIG.
0 through an interlocking pin 11
A light reflecting surface 14 is formed on the front surface of the upper end of the rod 12, which projects upward from the upper end of the door body 1. Reference numeral 15 denotes a retroreflective photoelectric switch attached to a fixed part around the entrance/exit 2 so as to face the light reflecting surface 14 .

Reference numeral 16 denotes a photoelectric switch for detecting passersby passing through the entrance/exit 2;
It is composed of a light emitter 17a provided on one side fixed part and a light receiver 17b provided on the other side fixed part of the entrance/exit 2, and is a retroreflective photoelectric switch with a light reflecting surface arranged on one side. You can also use This passerby detection photoelectric switch 16 is
It is arranged at a position as close to the door body 1 as possible on the outside of the vehicle or on the outdoor side with respect to the door body 1.

The handle 7 is held in an initial state in which it hangs straight down as shown by the solid line in FIG. 3 by the lift rod 12 which is at its upper limit position due to the biasing force of the spring 13. In this state, the upper end portion of the lifting rod 12, that is, the portion provided with the light reflecting surface 14 is connected to the door body 1.
The light beam from the retroreflective photoelectric switch 16 on the fixed side protrudes further upwardly from the light reflecting surface 15.
The light is reflected by the light and enters the light receiving section of the photoelectric switch 15, and the photoelectric switch 15 is in an OFF state.

The door opening limit switch 6, the retroreflective photoelectric switch 15, the passerby detection photoelectric switch 16, etc. are used as a control signal source for the opening/closing driving means 5 for sequence control or program control means, as shown in the flowchart of FIG. Door opening control and door closing control are performed as shown.

That is, as explained earlier, when the handle 7 is in the initial state hanging straight down, the photoelectric switch 15 is
It is in the OFF state. Handle 7 is the person who has the will to open the door.
is swung in the direction of opening the door as shown by the imaginary line in FIG.
2, the light reflecting surface 14 exits downward from the optical path of the photoelectric switch 15, and the reflected light disappears, so the photoelectric switch 15 is switched to the ON state. The switching of the photoelectric switch 15 to the ON state serves as a door opening command signal, and the opening/closing driving means 5 operates to open the door, thereby opening the door body 1.

Incidentally, as is natural for this type of control, once the photoelectric switch 15 is switched to the ON state and the opening/closing drive means 5 operates to open the door, the handle 7 is returned to its original initial state and the photoelectric switch 15 is turned OFF. A holding function is provided to hold the door opening command signal so that the door opening operation is not interrupted even if the state is restored.

When the opening door body 1 reaches the opening limit position and the opening limit switch 6 is turned off, the door opening operation of the opening/closing drive means 5 is stopped. The door body 1 continues to be stopped at the opening limit position until a certain period of time (about several seconds) set on the timer has elapsed. Handle 7
The person who operated the can pass through the entrance/exit 2 which was opened during this time.

When the set time has elapsed after the door body 1 stopped at the opening limit position, the photoelectric switch 15 is in the OFF state (the handle 7 is returned to the initial state).
The opening/closing driving means 5 is operated to close the door under the condition that the passerby detection photoelectric switch 16 is in the OFF state (no one is passing through the entrance/exit 2). The clock operates at the set time each time the handle 7 is operated in the door opening direction and the photoelectric switch 15 is turned on, and when a person passes through the doorway 2 and interrupts the optical path of the photoelectric switch 16 for detecting a passerby. Accordingly, it is updated every time the photoelectric switch 16 is switched to the ON state. Therefore, the door closing operation is not performed while a person is passing through the doorway 2. Of course, even if the door body 1 starts to close, if the handle 7 is operated in the door opening direction and the photoelectric switch 15 is switched to the ON state, or if a person passes through the doorway 2, etc. When the photoelectric switch 16 for detecting a passerby is switched to the ON state, the opening/closing driving means 5 is switched from the door closing operation state to the door opening operation, and the door body 1 is immediately opened.

Note that a locking mechanism that automatically locks the door body 1 in the closed door position may also be used. This locking mechanism can be automatically unlocked prior to the door opening operation by the opening/closing driving means 5, but when the movable handle 7 is used as in the above embodiment, for example, as shown in FIG. As shown in FIG. 3, a fixed locking pawl 18 is provided which automatically engages with the upper end of the lifting rod 12 when the door body 1 moves to the closing limit position, and the locking claw 18 is fixed by swinging the handle 7 in the door opening direction. It is also possible to configure the upper end of the lifting rod 12 to be released from the locking pawl 18 to release the lock.

Although the movable handle 7 is used as a manual operating tool, the present invention is not limited to this. For example, it is also possible to use a manual operating tool in the form of a large push button that moves inward to the door body when pressed with the fingertips. Further, even when using a handle, any handle such as a lever type or a knob type can be used. Furthermore, when a handle is used that has a movable part that can be operated with fingers in a part of the handle, the movable part can be used as a manual operating tool.

In the above embodiment, the light reflecting surface 14 itself is moved in conjunction with the operation of the manual operating tool to switch the ON/OFF state of the regressive photoelectric switch 15. It is also possible to form a light beam blocking portion, for example, at the upper end of the lifting rod 12, for blocking the light beam entering and reflecting path to the light beam reflecting surface 14, and to link it to a manual operating tool.

(Effects of the Invention) According to the automatic door device of the present invention that can be implemented as described above, the door is not opened unless the manual operating tool provided on the door body is operated, so that a person standing near the door cannot open the door. This eliminates the inconvenience of the door opening automatically or simply when a person passes in front of the door. Therefore, the automatic door device of the present invention can be effectively utilized in areas where automatic door devices of this type cannot be used, such as entrances and exits between vehicles for commuting vehicles and store entrances and exits at checkout counters.

Moreover, there is no need for any electrical parts such as switches on the door side that moves to open and close, and therefore there is no need to provide a special electrical path between the door and the fixed side that does not affect the opening and closing movement of the door. All systems can be installed on the fixed side. Therefore, it can be carried out at a very low cost, and maintenance and inspection of the electrical system is also easy.
It can be used as an automatic door device with a long service life and less risk of electrical system failure.

Furthermore, since the optical path between the light reflecting surface on the door body side and the retroreflective photoelectric switch on the fixed side is placed above the top edge of the door body, an opening for the optical path should be provided at the front edge of the door body. Not only does it become unnecessary to form the optical path, but also tampering with the optical path can be avoided.

Further, the photoelectric switch for detecting passersby has the advantage that it can be installed at a fixed part around the entrance/exit, where there is no risk of it being tampered with, and where it is most convenient for detection.

[Brief explanation of the drawing]

Figure 1 is a schematic front view of the whole, Figure 2 is a cross-sectional plan view, Figure 3 is a longitudinal front view showing details of the main parts, Figure 4
The figure is a flowchart explaining the control procedure. DESCRIPTION OF SYMBOLS 1... Door body, 2... Doorway, 3... Guide rail, 4... Wheel, 5... Opening/closing drive means, 6
... Door opening limit switch, 7 ... Movable handle (manual operating tool), 8 ... Detection state switching means, 9 ... Support shaft,
10... Vertical movement arm, 11... Interlocking pin, 12
... Lifting rod, 13 ... Spring, 14 ...
Light reflecting surface, 15...Recurrence reflective photoelectric switch,
16...Passerby detection photoelectric switch, 17a...
Emitter, 17b...Receiver, 18...Fixed locking claw.

Claims (1)

[Claims] 1. A light reflecting surface that is detected by a retroreflective photoelectric switch provided on the fixed side is provided at the upper end of the door body that is opened and closed by the opening/closing drive means, and a manual operating tool provided on the door body is operated. A detection state switching means is provided for changing the ON/OFF state of the photoelectric switch by blocking the light input reflection path of the light reflection surface or moving the light reflection surface itself in conjunction with the above-mentioned door body. A photoelectric switch for detecting passersby is provided at a fixed part around the doorway that is opened and closed at a position close to the door body, and when the manual operating tool is operated, the retroreflective photoelectric switch is activated.
The opening/closing drive means is configured to operate to open the door when the ON/OFF state changes, and the opening/closing drive unit is configured to not operate to close the door when the photoelectric switch for detecting a passerby is in the passerby detection state. Automatic door device.