JPS6118558A - Automatic opening device for door - 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 detects an increase in air pressure in the door rubber when a person or object is caught in the door, and uses this detected pressure to reverse and open the door. This invention relates to an automatic door opening device. - [Prior art] As shown in Figs. A highly sensitive pressure switch (4) detects the increase in air pressure in the air bag (3) provided in the air bag (3), and a movable contact (
6), converts it into an electrical signal, and sends the signal from the door body, which is a moving body, to a curled electric wire cord (force, etc.) to give a reverse opening operation command to the door closing device (shown in the diagram). In conventional technology such as
malfunction due to vibration, non-operation when the hitting speed is slow, difficulty in adjusting the touching pressure, and breakage of moving cables such as curled electric wire cords.

It was not highly reliable due to durability issues.

In the figure, (8) is a pressure switch air chamber, (9) is an air vent hole with a throttle valve, and α0 is a cord support.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and solves the problems of the conventional technology by simple and rational means, detects operation without contact, has excellent durability and maintainability, and
The purpose is to provide a device that operates properly.

[Means for solving problems]

As a means to solve the conventional problems, the automatic door opening device of the present invention detects the increase in air pressure in the door rubber when a person or object is caught in the door, and uses this detected pressure to reverse the door. The device which is designed to open the door is composed of a light shielding body which projects above the door body due to the rising air pressure, and a phototube device whose optical axis is blocked by the light shielding body and which outputs a door reversal opening signal. This is a characteristic feature.

〔Example〕

The details of the embodiments will be explained with reference to the drawings. Figure 1 and the spear figure show an embodiment of the spear 1, and the fang 3 figure and the spear figure show an example of the fang. Fang 1 is a partially omitted front view of the Fang I embodiment, a spear figure is a partially omitted front view of the same operating state as above, Fang 3 is a partially omitted front view of the Fang embodiment, and Fang 4 is the same as above. The partially omitted front view of the operating state and the figure S are actual circuit diagrams.

First, to explain the example of the example l and λ diagram, aυ
is a door body, and inside the door tip rubber αB of the door body (11),
A long air bag A3 is built in over approximately the entire length of this air bag. At the upper end of the air bag αJ, an air cylinder α4 is connected to a door body αη.
A piston αe having a light shielding plate α attached to its upper end is fitted into the air cylinder a4. The collector η is a phototube light emitter, and α樟 is a phototube receiver. When the optical axis is blocked by the light shielding plate (I!9), an inversion opening signal of the door body υ is output.

In the embodiment shown in Figure J and 4', the air cylinder α is replaced with a structure of a piston ae and a four-light plate αω, and a light-shielding balloon ←9 is connected to the upper end of the air bag a3. The effects are completely equal for both.

[Operation explanation]

To explain the operation of the above-mentioned embodiment, when the door body (11) is moving in the closing operation, when an obstacle such as a human body or an object is caught between the door tip rubber α2 and the vehicle body, the door tip rubber a2 Inner air bag a3
is compressed, and this compressed air pressure pushes up the piston Q61 in the air cylinder α, raises the light shielding plate a9, blocks the optical axis emitted from the phototube emitter ←η, and operates the phototube receiver <18>. Then, a reverse opening operation command is issued to the door closing device (path shown) to reverse open the door body aυ and release the trapped person or object.

In the embodiment of Fang λ, the light-shielding balloon α is inflated by compressed air pressure to block the optical axis, and the following operations are the same as those of the embodiment of Fang I.

Next, the third figure α will be explained. This is the case when an air cylinder operated by pneumatic pressure is used as the actuator of the door closing device. Normally, when the driver or conductor presses the door opening button Q1J in the driver's cab, relay A is energized and self-holds. , operate the solenoid valve (c) at the contact point of relay A to open the door body. By pressing the door close button, relay A is demagnetized and the door body is closed.

In addition, when relay J-A is demagnetized and the door rubber is pressed while the door body is closing, the phototube is activated and relay B
is excited and self-holds, and the solenoid valve (
Operate the door again and open the door body again. The door is opened, the door open position detection IJ switch (c) is activated, relay B is demagnetized, and the door is automatically closed immediately.

On the other hand, in Figure 5, relay A is demagnetized and the door rubber is pressed while the door body is closing, so the phototube is activated.
Energize relay B. Relay A is energized by the excitation of relay B, and the door body is opened.

With this method, the door does not close immediately, but remains open until the staff confirms that it is safe and presses the door close again.

In this way, the present invention can be applied to either method.

In the figure (C) is the door closing device relay panel, and (Foundation) is the phototube amplifier.

(c) is a limit switch for detecting the open position of the door.

〔effect〕

As described above, the present invention has the following effects.

(α) Unlike the conventional technology, the air vent provided in the high-sensitivity pressure switch does not have a hole, so even if the door rubber is pushed slowly, the light shield will operate reliably and the optical axis of the photocell will be protected. By blocking light and outputting a door reversal release signal, the door closing device can be reversed to reliably open the door and free a trapped human body or object.

(b) Since it is a non-contact method, there is no need for moving cables for signal transmission, and a highly reliable device can be easily obtained.

[Brief explanation of drawings]

Fig. 1 is a partially omitted front view showing the lance embodiment of the device of the present invention, Fig. 3 is a partially omitted front view of the same operating state, and Fig. 3 is a partially omitted front view of the fang 2 embodiment. Figure 1 is a partially omitted front view of the same operating state as above, and Figure 3 is α. K is an actual circuit diagram, Figure 4 is a front view of a conventional device, and Figure 4 is a sectional view of the same pressure switch. aυ...door body, a2...rubber door, housing...air bag, Q4)...air cylinder i, 3a...shading plate, (
Lo... BisFun, aη... Phototube light emitter, α-
...Phototube receiver, ell...shading balloon. /J Figure 3 Figure 4 Figure 5 (Figure 6

Claims (3)

[Claims] (1) In a device that detects an increase in air pressure in the door rubber when a human body or object is caught in the door, and uses this detected pressure to reverse and open the door, the increased air pressure causes the door to close. 1. An automatic opening device comprising: a light shield projecting upward; and a phototube device whose optical axis is blocked by the light shield and which outputs a door reversal opening signal. (2) The automatic door opening device according to claim 1, wherein the light shielding body is a plate. (3) The automatic door opening device according to claim 1, wherein the light shielding body is a balloon.