JPH07106867B2 - Doorway safety device for elevator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an entrance / exit safety device for an elevator.

(Prior Art) Generally, in elevators, as a door for getting in and out, usually a side-opening type door, which is divided into a door for getting on and off and a door for a car room, is often used. Call the car room by pressing the call button installed at the entrance on the side of the hall, board when the doors of the boarding / alighting room and the car room open, and press the push button on the target floor installed at the entrance of the car room and close the door. After moving the car room up and down to the destination floor, you can open the door and get off to the hall side.

By the way, in such an elevator, an unspecified number of passengers unintentionally repeat operations such as calling in a cab, opening and closing a door, getting on and off a door, etc. Are equipped with various safety devices.

And as a safety device during this kind of door closing operation,
Normally, mechanical safety, electromagnetic safety, ultrasonic sensor, photoelectric switch, etc. are used, but in reality, there are not enough safety devices for opening the door. Therefore, especially in elevators, since doors are often made of steel plate and windows are not attached due to fire prevention regulations, it is impossible to determine when the door opens unlike automatic doors, trains, buses, etc. Sometimes.

Also, when waiting for the car room on the floor side of each floor, it is difficult to know the arrival of the car room unless you always look at the position indicator of the car room. The door may open suddenly when called from.

In such a case, for example, if an infant is playing at the hall side and leaning on the hall door, or if the car room is full and passengers are pressed against the car side door, the door will open. During operation, there is a risk that a hand or a finger may be drawn between the frame forming the doorway and the door to cause an injury, and sufficient safety measures in such a case are also necessary.

Therefore, as a safety device of this kind, as shown in FIG. 6, a finger H is conventionally sandwiched in a gap a between a door 4 and a vertical frame 3 forming an entrance / exit 2 on the side of a cab 1. At this time, by detecting the bending of the door 4 or by attaching a tape switch to the vertical frame 3, a switching operation can be performed when the tape switch is pressed by a finger H, and a part of the vertical frame 3 can be freely moved. And the vertical frame 3 when pressed with the finger H
There are various proposals for operating a switch installed on the back side of the switch according to the movement of the switch.

(Problems to be Solved by the Invention) However, in each of the above-described conventional safety devices, the fact that the finger H is sandwiched between the door 4 and the frame 3 is directly detected, which causes a serious injury. Can be prevented,
There was no change in the fact that fingers and the like were caught, and there was a problem that in some cases there was a risk of causing a small injury.

The present invention has been made under the circumstances described above, and its purpose is to detect an essential problem that a conventional safety device has, that is, not to detect after a finger or the like is caught, It is an object of the present invention to provide a safer elevator entrance / exit safety device capable of detecting a foreign matter such as the front side before a finger or the like is caught.

[Structure of the Invention] (Means for Solving Problems) In order to solve the problems described above, the present invention maintains a constant gap in a vertical frame that forms an entrance of a car room or an entrance / exit. A photoelectric sensor in which a recess is provided in the longitudinal direction of the side of the vertical frame facing the door, and light is emitted and received along the longitudinal direction in the recess at the entrance and exit of an elevator in which a laterally opening type door is openably and closably installed The foreign matter detecting means is formed.

(Operation) That is, according to the present invention, with the above configuration,
Since the door of the vertical frame forming the entrance and exit of the elevator is provided with the foreign matter detection means composed of a photoelectric sensor for projecting and receiving light in the recess provided in the longitudinal direction on the side facing the door,
Since a photoelectric sensor can detect a foreign substance at the same time when a finger or the like approaches the vicinity of a vertical frame facing the door and is inserted into the recess, the foreign substance detection signal from the photoelectric sensor can be linked to the door opening / closing mechanism. By controlling the opening and closing of the door to stop immediately, it is possible to stop the opening and closing of the door before fingers and the like are caught between the door and the vertical frame, thereby preventing small injuries. It becomes possible to avoid the danger.

(Examples) Hereinafter, an example of the present invention will be described in detail with reference to the cross sections shown in FIGS. 1 to 5. In the illustrated embodiment according to the present invention, the same parts as those of the conventional elevator entrance / exit shown in FIG.

As shown in FIG. 1 and FIG. 2, in the vertical frame 3 forming the doorway 2 of the car room 1, the upper end and the lower end are left on the surface facing the door 4 in the longitudinal direction with about 100 mm left. A recess 31 is provided, and the projector 5a and the photoreceiver 5b constituting the photoelectric sensor 5 are built in the end portions of the upper and lower ends of the recess 31 so as to face each other, and the optical axis L extends along the inner longitudinal direction of the recess 31. It is designed to be irradiated.

By the way, the size of the recess 31 is set to the minimum size that allows the fingertip to be inserted without coming into contact with the door 4 side.
The output signal of the photoelectric sensor 5 is input to the door control circuit via a cable, and if there is a signal input during the door opening operation, the door opening operation is temporarily stopped. Alternatively, a control system is formed so as to change the door drive by reversing the door to perform a closing operation.

Further, in the cab 1 described above, the vertical direction of the vertical frame 3 forming the doorway 2 is fixed to the interior panel 6, and the upper part thereof is fixed to the curtain plate 8 having the indicator 7 built therein. It is configured by being fixed to the ceiling 9.

On the other hand, a pair of left and right cab doors 4 for opening and closing the doorway 2 of the cab 1 in a laterally opening manner are provided with cushion rubber on the opening and closing ends.
A hanger roller which is equipped with a decorative joint 11 to which 10 is fixed and which is rotatably supported by a door hanger 12 on the upper part.
13 is suspended on a door rail 14 fixed to the side of the cab 1, and at its lower part, a door shoe 16 is inserted into a groove of a sill 15 fixed to the floor of the cab 1.
It is designed to be guided in the opening direction.

That is, in the door safety device described above, as shown in FIGS. 3 and 4, when the fingers H of the elevator passenger approach the gap a between the vertical frame 3 and the door 4 and are inserted into the recess 31 during the door opening / closing operation. , The optical axis L is blocked, and the light from the light emitter 5a is received by the light receiver.
5b is no longer reached, thereby limiting the door opening operation and preventing the fingers H from being caught in the gap A between the vertical frame 3 and the door 4. In this way, the fingers H approaching the vicinity of the vertical frame 3 are detected by the photoelectric sensor 5 when they are inserted into the recess 31, and the door opening control is changed by the detection signal so that the door 4 and the vertical frame 3 can be changed. It is possible to avoid the danger by stopping the door before being caught.

Further, as shown in FIG. 5, even when the passenger M stands near the vertical frame 3 of the entrance / exit 2 and the door 4 opens while the passenger compartment 1 is full, the optical axis L of the vertical frame 3 is Since the passenger's body, arms, etc. are blocked by the side surface of the vertical frame 3 and do not enter the recess 31 because they pass through the recess 31, the optical axis L is not blocked and the door opening operation is hindered. Absent. Further, the same is true when the passenger starts to open the door and gets in and out of the vicinity of the doorway, and there is no problem in the door opening operation. In this case, a part of the passenger's body smaller than the recess 31 enters into the recess 31 only when approaching the gap a between the vertical frame 3 and the door 4, so that the optical axis L is blocked at this time. , It is possible to reliably detect before being caught in the gap a. As a result, a size that is not caught in the gap between the vertical frame 3 and the door 4 is not detected even when it comes near, and a size that is smaller than a certain size that may be caught is approached. It can operate selectively only when.

The present invention is not limited to the above embodiment, and can be used not only on the car side but also on the hall door.

Also, although only a part of the vertical frame forming the entrance / exit in the longitudinal direction was made into a concave part, the concave part was provided over the entire length of the frame for ease of manufacturing, and the photoelectric sensor was installed on the curtain plate part and the floor surface. However, the same action and effect as the present invention can be exhibited.

Further, regarding the type of the photoelectric sensor, in the specific example, the transmission type having one light emitter and one light receiver has been described, but the light emitter and the light receiver are integrated, and the reflection plate is installed on the opposite surface. A reflective photoelectric sensor may be used.

Furthermore, the function of the recess formed in the frame is to identify a size that can be sandwiched in the gap with the door, preventing malfunctions during normal boarding and alighting, but without making the frame concave. On the outside of the frame, an optical axis is provided in the vicinity of the door, and a plate-shaped or rod-shaped object that protects the optical axis as a separate component is fixed and installed on the frame, floor, or curtain plate. Alternatively, an optical axis may be installed in front of the gap between the diaphragm and the door with a condensing lens to detect the approach of an obstacle before the door opening operation and give a warning.

In addition, it goes without saying that the present invention can be variously modified and implemented within the scope of the present invention.

[Effects of the Invention] As is apparent from the above description, according to the present invention, a photoelectric conversion device that projects light into and receives light from a recess provided in the longitudinal direction on the side facing the door of the vertical frame that forms the entrance and exit of the elevator. Since the foreign matter detecting means including the sensor is provided, the foreign matter can be detected by the photoelectric sensor at the same time when the fingers and the like approach the vicinity of the vertical frame facing the door and are inserted into the concave portion,
If the detection signal of a foreign substance by this photoelectric sensor is linked to the door opening / closing mechanism to control the door opening / closing to stop immediately, the door opening / closing can be performed before fingers are caught between the door and the vertical frame. Therefore, it is possible to provide an elevator entrance / exit safety device having an excellent effect that a small injury can be prevented in advance and a danger can be avoided.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an entrance / exit provided with an elevator entrance / exit safety device according to the present invention, FIG. 2 is a longitudinal sectional view of the entrance / exit, FIG. Is an explanatory view showing the same operating state, FIG. 5 is an explanatory view of the safety device in a fully occupied state, and FIG. 6 is an explanatory view showing an operating state at an elevator doorway of a conventional structure. 1 ... Car room, 2 ... entrance, 3 ... vertical frame, 31 ... recess, 4 ... door, 5 ... photoelectric sensor, L ... optical axis, H ...
… Fingers.

Claims (1)

[Claims] 1. The door of the vertical frame faces the doorway of an elevator in which a laterally-opening type door is installed so as to be openable and closable while maintaining a constant gap with respect to the vertical frame forming the doorway of a car room or a boarding / alighting area. An entrance / exit safety device for an elevator, characterized in that a concave portion is provided in a longitudinal direction of the side, and foreign matter detection means including a photoelectric sensor that projects and receives light is provided along the longitudinal direction in the concave portion.