JPH0941802A - Automatic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic door of higher safety by positively detecting an obstruction such as a human body. SOLUTION: A distance measuring sensor 13a is provided at the upper end of a door 1, and a controller 14a is provided above the door 1 so as to constitute a second detecting device including at least the distance measuring sensor 13a and the controller 14a. Upon receiving a second detection signal from the second detecting device, an opening/closing control device 12 stops the opening/ closing action of the door 1 or reverses the action of the door 1 from closing action to opening action.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automatic door.

[0002]

2. Description of the Related Art A perspective view of an automatic door according to the present invention is shown in FIG.
The side view of the structure is shown in FIG. 7A, and the top view of the structure is shown in FIG.
(B). (First Conventional Example) As an automatic door, as shown in FIG. 7A, a belt 8 is wound around a drive pulley 7 and a driven pulley 10 which are normally and reversely rotated by a motor 6, and the belt 8 is used as the door 1. It is known that the door 1 is automatically opened and closed in the left and right directions by connecting the motor 6 to the motor 6 in the forward and reverse directions.

In such an automatic door, a mode is detected by a first detection signal (hereinafter referred to as a detection signal) from a first detection device (hereinafter referred to as a detection device) 2A, 2B such as a human body. Drive the motor 6 in a predetermined operation pattern in the forward and reverse directions,
The door is opening and closing. The detectors 2A and 2B are typically attached to the engine case 3 at a substantially central portion as shown in FIGS. 6 and 7 (b), and a person approaches by the change in the reflected amount of infrared rays output. There are a ray sensor for determining whether or not there is a hit, a mat sensor that is embedded in the floor of the entrance and exit, and determines a capacitance change due to a person approaching. Further, as shown in FIG. 8, the detection ranges X1 and X2 of these detection devices 2A and 2B are usually present near the entrance-side and exit-side doors 1 having a width substantially equal to the entrance / exit width. In FIG. 7A, 3 is an engine case that houses and arranges the drive pulley 7 to the driven pulley 10, 5 is an automatic door control device, and 9 is a belt that stably fixes the belt 8.

However, as shown in FIG. 8, the vicinity of the movement path of the door 1 is a non-detection area X3 of the detection devices 2A and 2B, and if an obstacle such as a human body exists there, the opening / closing operation of the door 1 is performed. There is a possibility that it will interfere with.

Then, as a means for solving such a problem, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 52-111152. (Second Conventional Example) This example has a function of reversing the operation from the closing operation to the opening operation or stopping the door when the opening / closing operation of the door is disturbed by an obstacle such as a human body. In other words, if an obstacle such as a human body is caught in or comes into contact with the door during the opening / closing operation of the door, the rotation of the motor is blocked, and it is detected that an overcurrent flows in the opening / closing drive circuit and the emergency release switch To open the door.

[0006]

However, in the second conventional example, when the obstacle is relatively lightweight, such as a child or an elderly person, the motor is not sufficiently loaded and the door There is a problem that the operation inversion and the stop operation may not be performed.

The present invention has been made in view of the above problems, and an object thereof is to provide an automatic door with higher safety by surely detecting an obstacle such as a human body. is there.

[0008]

In order to solve the above problems, according to the invention of claim 1, the first detection for detecting the approach of a human body or the like and outputting a first detection signal. An automatic door including a device and an opening / closing control device that opens and closes the door upon receiving a first detection signal, detects a presence of an obstacle in a traveling direction of the door, and outputs a second detection signal. In addition to providing the second detection device, the opening / closing control device receives the second detection signal to stop the opening / closing operation of the door or reverse the operation of the door from the closing operation to the opening operation.

According to a second aspect of the present invention, the second detection device is configured to include at least a distance measuring sensor for measuring a distance to an obstacle.

According to the third aspect of the present invention, the second detection device is characterized by including at least an infrared light projecting portion and an infrared light receiving portion.

[0011]

[Embodiment]

(Embodiment 1) FIG. 1 shows a side view of a first embodiment according to the present invention.

The difference from the first conventional example shown in FIGS. 6 to 8 is that the distance measuring sensor 13a is provided at the upper end of the door 1 and
The controller 14a is provided above the door 1, and a second detection device (hereinafter, referred to as a detection device) including at least the distance measuring sensor 13a and the controller 14a is configured, which is the same as the other first conventional examples. The description is omitted by giving the same reference numerals to the configurations.

Here, the distance measuring sensor 13a is a sensor whose output voltage changes according to the reflection distance of infrared rays and which is capable of measuring the distance and detecting the presence or absence of an object.

FIG. 2 is a schematic block diagram of the controller 14a. The controller 14a includes the opening / closing control device 12
A transmission unit 16 that transmits a second detection signal (hereinafter, referred to as a signal) So, a CPU 17, a distance measuring sensor 13a, a transmission unit 16, and a power supply unit 15 that supplies power to the CPU 17. The CPU 17 transmits a signal to the distance measuring sensor 13a, determines whether there is an obstacle such as a human body based on the signal transmitted from the distance measuring sensor 13a, and sends the information to the transmitting unit 16. FIG. 3 shows the distance measuring sensor 1
A characteristic diagram of a reflection distance (hereinafter referred to as distance) Y of the infrared ray S1 output from 3a and an output voltage Vo of the distance measuring sensor 13a is shown. Here, the distance measuring sensor 13a and the ground are set to a distance L1, and the output voltage Vo of the distance measuring sensor 13a at the distance L1 is set to a voltage VL. As shown in FIG. 3, it can be seen that the output voltage Vo decreases as the distance Y increases.

Next, the operation will be briefly described with reference to FIGS. If there is an obstacle such as a human body in the traveling direction of the door 1 during the opening / closing operation of the door 1, the distance Y becomes smaller than the distance L1 and the output voltage Vo becomes larger than the voltage VL. That is, when the output voltage Vo becomes higher than the voltage VL, the CPU 17 detects the presence of an obstacle such as a human body and wirelessly transmits the signal So to the opening / closing control device 12 via the transmitting unit 16 to notify the opening / closing operation of the door 1. The operation is stopped or the operation of the door 1 is reversed from the closing operation to the opening operation.

(Second Embodiment) FIG. 4 is a side view of a second embodiment according to the present invention.

The difference from the first embodiment shown in FIG. 1 is that, instead of the distance measuring sensor 13a, a projector 18 for infrared rays S2 is provided at the upper end of the door 1 and an infrared ray S2 is provided at the lower end of the door 1. The light receiving unit 19 is provided, and the light projecting unit 1 is controlled by the controller 14a.
8. It is said that the second detecting device (hereinafter, referred to as a detecting device) including at least the light projecting unit 18, the light receiving unit 19, and the controller 14a is configured while operating the light receiving unit 19. The other configurations that are the same as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

In the present embodiment, the presence of an obstacle such as a human body is detected by blocking the infrared ray S2, and the door 1 is detected.
The opening / closing operation of is stopped or the operation of the door 1 is reversed from the closing operation to the opening operation.

(Third Embodiment) FIG. 5 shows a side view of a third embodiment according to the present invention.

The difference from the first embodiment shown in FIG. 1 is that a plurality of distance measuring sensors 1 are used instead of the distance measuring sensor 13a.
3b are arranged at the side end of the door 1, and the controller 14a
The configuration is the same as that of the first embodiment except that the description thereof will be omitted.

In the present embodiment, the infrared ray S3 from the distance measuring sensor 13b is projected in a substantially horizontal direction on the ground, and the distance between the distance measuring sensor 13b and an obstacle such as a human body becomes shorter than the distance L2. By detecting the presence of an obstacle such as a human body, the opening / closing operation of the door 1 is stopped, or the operation of the door 1 is reversed from the closing operation to the opening operation.

[0022]

According to the first aspect of the present invention, an obstacle such as a human body is surely detected, the opening / closing operation of the door is stopped, or the operation of the door is reversed from the closing operation to the opening operation. We can provide highly safe automatic doors.

According to the second aspect of the present invention, the distance measuring sensor reliably detects the distance to an obstacle such as a human body and stops the opening / closing operation of the door or reverses the operation from the closing operation to the opening operation of the door. By doing so, a more safe automatic door can be provided.

According to the third aspect of the present invention, it is surely detected that the infrared rays output from the light projecting unit are blocked by an obstacle such as a human body, and the opening / closing operation of the door is stopped or the door is closed. By reversing the operation from to open operation,
A safer automatic door can be provided.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment according to the present invention.

FIG. 2 is a schematic configuration diagram of a controller according to the above embodiment.

FIG. 3 shows a characteristic diagram of a distance measuring sensor.

FIG. 4 is a side view showing a second embodiment according to the present invention.

FIG. 5 is a side view showing a third embodiment according to the present invention.

FIG. 6 shows a perspective view of a first conventional example according to the present invention.

FIG. 7 is a side view of a structure according to the above conventional example.

FIG. 8 is a top view of a structure according to the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 First detection device 12 Opening / closing control device 13 Distance measuring sensor 18 Light emitting unit 19 Light receiving unit S signal

Claims (3)

[Claims] 1. A first method for detecting the approach of a human body or the like.
In an automatic door equipped with a first detection device that outputs a detection signal of 1. and an opening and closing control device that opens and closes the door by receiving the first detection signal, there is an obstacle in the traveling direction of the door. A second detection device that detects and outputs a second detection signal is provided, and the opening / closing control device receives the second detection signal and stops the opening / closing operation of the door or closes the door. An automatic door characterized in that the operation is reversed to the opening operation. 2. The automatic door according to claim 1, wherein the second detection device includes at least a distance measurement sensor that measures a distance to an obstacle. 3. The automatic door according to claim 1, wherein the second detection device is configured to include at least an infrared light projecting portion and the infrared light receiving portion.