JPH10265156A - Safety device for entrance of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a safety device at a low cost and in a short time which is not caught in a car door by interposing a projector and a photodetector for detecting an obstacle, and outputting a re-open signal for again opening a car door and a landing door according to the detection of an obstacle when the car door is closed. SOLUTION: A projector 6a and a photodetector 6b are arranged on the car 2 side of a car post 4, and fixed to the car post 4 by a bolt 8. When a car passenger touches an operating unit 6 to insert hands or the like in a gap of the door 1 for stopping the door in the process of being closed in the midway, naturally light 7 is intercepted. In response to interception of light 7, a door re-open signal for the door is output, so that the hands can be prevented from being caught in the car door 1 before it reaches an operating unit 9. Further, the device includes a speaker for outputting voice of a message for attracting passenger's attention or the like when an obstacle is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator entrance having a car door and a car column.

[0002]

2. Description of the Related Art FIG. 3 is a cross-sectional view for explaining a conventional elevator doorway having a car door and a car column. A pair of car doors 1 and a pair of car pillars 4 are provided at the elevator entrance shown in FIG. 3, and a pair of landing doors (not shown) also opens and closes as the pair of car doors 1 open and close.

[0003] Inside the car door 1 shown in FIG. 3, an operating body 9 protruding from the tip of the car door 1 and capable of retreating, and a lever 10 rotatably attached to the car door 1 in conjunction with the operating body 9. And a switch (not shown) for detecting the rotation operation of the lever 10 and outputting a restart door signal for opening the car door 1.

In this conventional safety device, when the pair of car doors 1 closes, the operating body 9 strikes an obstacle interposed between the front ends of the car doors 1 and retreats.
0 rotates, and accordingly, a switch (not shown) is operated to output a restart door signal for opening the car door 1. However, in the safety device shown in FIG. 3, when the passenger's hand 3 is inserted between the pair of car doors 1 from the car 2 side, the operating body 9 may not hit the passenger's hand 3 in some cases. The passenger's hand 3 could not be detected, and therefore, there was a concern that the passenger's hand 3 would get caught between the pair of car doors 1.

[0005] As a safety device for preventing such an accident at the entrance of the elevator, for example, Japanese Patent Application No. Hei 7-32917.
No. 9 has been proposed.

FIG. 2 is a cross-sectional view of a safety device provided with such a safety device for an entrance of an elevator and a peripheral portion thereof.

[0007] As shown in FIG. 2, the above-mentioned safety device comprises a light emitter 6a and a light receiver 6 which are arranged to face each other.
b, the projector 6a is provided in the gap between one of the car doors 1 and the car pillar 4, emits light 7 toward the other car door 1, and the light receiver 6b is the other car door 1. It is provided in the gap between the pillar 4 and receives the light 7. These light emitter 6a and light receiver 6b are arranged as shown in FIG.
Are attached to the car columns 4 as shown in FIG.

In this safety device, when an obstacle such as the hand 3 shown in FIG. 3 is interposed between the open ends of the pair of open car doors 1, the obstacle blocks the light 7 from the projector 6a and the light is received. Since the light 7 is not received by the container 6b, the obstacle is detected and the restart door signal for opening the car door 1 and the landing door (not shown) is output.

[0009]

Among the above-mentioned prior arts, the safety device shown in FIG. 2 has a floodlight 6 arranged to face each other as shown in FIG.
a light receiver 6b, the light projector 6a is provided in a gap between one car door 1 and the car pillar 4, emits light 7 toward the other car door 1, and the light receiver 6b is connected to the other car door 1. It is provided in a gap between the car door 1 and the car pillar 4 and receives the light 7. The light emitter 6a and the light receiver 6b are respectively attached to the car pillar 4 as shown in FIG. Therefore, in order to attach the light emitter 6a and the light receiver 6b to the car pillar 4, the car pillar 4 must be manufactured in advance with the pillar width C in consideration of the thickness A of the light emitter 6a and the light receiver 6b. . Therefore, if the safety device shown in FIG. 2 is to be attached to the conventional elevator doorway shown in FIG. 3, the gap B between the car door 1 and the car pillar 4 must be larger than the thickness A of the light emitter 6a and the light receiver 6b. No, but B <
Because of the relationship A, the car pillar 4 must be remanufactured with the pillar width C in consideration of the thickness A. Therefore, when installing the safety device shown in FIG. 2, there were problems such as the cost of manufacturing the car pillar 4 and the cost of removing and newly installing the car pillar 4 were high.

The present invention has been made in view of such a situation in the prior art, and an object thereof is to provide an inexpensive safety device for an elevator entrance which can prevent a passenger from being caught in a car door. In a short time.

[0011]

SUMMARY OF THE INVENTION In order to achieve this object, the present invention relates to a safety device for an elevator doorway provided at an entrance and exit of an elevator having a car door and a car column for detecting an obstacle located at the entrance and exit. , The car pillar is disposed to face each other, the obstacle is detected by interposing a light emitter and a light receiver, and when the car door is closed, the car door and the landing are detected according to the detection of the obstacle. It is configured to output a reopening signal for opening the door again.

In the present invention constructed as described above, since only holes for bolts for mounting the light-emitting device and the light-receiving device on the car pillar are formed, a cage generated when an attempt is made to apply a safety device to an existing elevator doorway. The production of pillars and the removal and construction of new car pillars can be eliminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a safety device for an elevator doorway according to the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a safety device for an elevator entrance having a car and a car door according to an embodiment of the present invention.

In the embodiment shown in FIG. 1, a light projector 6a and a light receiver 6b are arranged on the inside of the car column 2 of the car column 4 and are attached to the car column 4 by bolts 8.

In this embodiment, as shown in FIG. 3, the car door 1 which has begun to close is tried to be stopped halfway, and the passengers in the car try to touch the operating body 6 and use the hand 3 or the like to close the car door. When inserted from the gap 1, the light 7 is naturally blocked. By interrupting the light 7, a door reopening signal is output, so that it is possible to prevent the car 9 from being caught by the car door 1 before the hand reaches the operating body 9.

Further, a speaker (not shown) for outputting a sound such as a message calling attention when an obstacle is detected is provided.

[0018]

The present invention is configured as described above.
Even if a passenger inserts a hand or the like from the gap of the car door, the light emitting device and the light receiving device detect and output the restarting door signal, so that it is possible to provide an inexpensive and short-time safety device that does not become caught in the car door. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an elevator car and a car door provided with an elevator doorway safety device according to the present invention.

FIG. 2 is a cross-sectional view of a conventional elevator car and a car door provided with a conventional safety device for an elevator doorway.

FIG. 3 is a cross-sectional view illustrating a conventional elevator doorway having a car door and a car column.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Car door 2 Riding car 3 Hand 4 Basket pole 5 Clearance 6a Projector 6b Receiver 7 Light 8 Bolt 9 Working body 10 Lever

Claims (2)

[Claims] 1. A safety device for an elevator doorway provided at an entrance and exit of an elevator having a car door and a car column, wherein the safety device for an elevator doorway detects an obstacle located at the entrance and exit, wherein the safety device is disposed on the car column so as to face each other, An obstacle is detected by interposing a light emitter and a light receiver, and when the car door is closed, a re-opening signal for re-opening the car door and the landing door in response to the detection of the obstacle is output. A safety device for an elevator entrance. 2. A safety device for an entrance of an elevator according to claim 1, wherein a speaker for outputting a sound for calling attention when an obstacle is detected by the light emitter and the light receiver is provided in the elevator car.