JP3297377B2 - Elevator doorway safety devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator doorway where passengers enter and exit between a car having a car door and a hall having a hall door. When an obstacle is detected when the door is closed, the door closing operation is stopped. And a safety device that can avoid danger.

[0002]

2. Description of the Related Art Conventionally, as a safety device for an elevator doorway, it has been possible to protrude a little toward the opening / closing end side (front end side) of a car door and retreat when pressed toward the opposite opening / closing end side (rear end side). An operating body, a lever that rotates in conjunction with the operating body, and a switch that detects the rotation of the lever and outputs a restart door signal, and when the restart door signal is output from this switch, the car door It is widely known that the door closing operation is stopped and the door opening operation is started. However, with this type of safety device that only uses the pressing force received from obstacles, there are concerns about inconveniences such as closing the door with clothes etc. sandwiched in between and the operating body easily applying impact to passengers' bodies. In recent years, a technique has been proposed in which a photoelectric device such as an infrared sensor is used in combination to enhance safety.

[0003] Such a conventional proposal is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-19.
As described in Japanese Patent Publication No. 8556, a projector or a receiver of a photoelectric device such as an infrared sensor is attached to a portion near the open / close end on the back side of the car door (outside of the car), and a light (infrared ray) is transmitted through a predetermined optical path. ) Can be detected to detect the presence or absence of an obstacle on the open / close end side of the car door. By adopting the safety device using light in this way, even if the obstacle is clothes or the like, the door closing operation can be stopped quickly, and the body of the passenger detected as the obstacle is pressed by the device. As a result, the safety of the elevator entrance is improved.

[0004]

By the way, the car door which slides in the left and right direction to open and close the car has left and right sides folded back to the rear as viewed from inside the car.
The folded ends are connected by a reinforcing member.However, depending on the type of elevator, there is a small bending allowance on the left and right of the car door and the folded end is considerably narrow. In such a case, it becomes impossible to secure a space for mounting the components of the safety device (light emitter and light receiver). That is, if the width dimension of the part (returned end) of the car door that wraps around to the back side is short, it is difficult to attach the component device to that part in a stable posture. Therefore, when applying the above-mentioned conventional proposal to an existing elevator having a car door having a folded back end portion, the car door must be replaced with a car door having a desired shape, which results in a large cost. There was a problem that was forced to up.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the prior art, and an object thereof is to provide a structure in which an existing car door is provided with a photoelectric device even if the folded end of the car door is narrow. It is an object of the present invention to provide a safety device for an elevator doorway, which can easily and surely attach a vehicle and improve safety at low cost.

[0006]

In order to achieve the above-mentioned object, the present invention is characterized in that both left and right sides are folded back when viewed from inside the car, and the folded ends are connected by a reinforcing member. The car door is installed at the entrance of an elevator where the car is opened and closed by sliding the car door in the left and right direction, and the components of the photoelectric device are attached to the car door to open and close the car door. In the safety device capable of detecting the obstacle of the above, in the vicinity of the folded end on the open / close end side of the car door, at the position where the folded end is extended to the anti-open / close end side, the folded end and the plate thickness And a seat extending in the up-down direction is arranged, and the seat is attached to the reinforcing member, and the component device is attached to the seat behind the car door.

[0007] The safety device constructed as described above, with a seat having the same plate thickness as the folded end portion of the car door interposed,
Since the components of the photoelectric device are fixed to the reinforcing member of the car door, even if the folded end is narrow, the components are held in a stable posture supported by a seat arranged adjacent to the folded end. Can be attached to a desired site. Therefore, the safety device can be easily and reliably attached to an existing car door without the uneconomical necessity of replacing the car door due to lack of mounting space.

If the seat is provided with an upright portion which is bent in a direction to stand upright with respect to the reinforcing member, the mechanical strength of the seat is increased, so that even if an impact or the like is applied to the seat, the above structure is obtained. Devices are less likely to be adversely affected.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
A description will be given based on FIG. However, FIG. 1 is a front view of a car door provided with a safety device for an elevator doorway according to this embodiment as viewed from the landing side, and FIG. 2 is a view of the safety device and its surroundings along the line AA in FIG. FIG.

[0010] As shown in these figures, the elevator doorway is provided with, for example, a pair of double-opened car doors 2 and a pair of landing doors 4. When the door is slid, the landing door 4 provided on the landing 3 slides in conjunction therewith, and the car 1 and the landing 3 are opened and closed. As described above, the car door 2 has both left and right sides folded back from the inside of the car 1 and the folded ends 2a are connected to each other by the reinforcing member 5, but depending on the elevator model, As shown in the figure, there is a car door 2 in which the left and right bending margins are small and the folded end 2a is considerably narrow.
The reinforcing member 5 has an operating body 6 which projects a little toward the open / close end side (front end side) of the car door 2 and can be retracted when pressed toward the opposite open / close end side (rear end side); And a switch 8 for detecting a rotation operation of the lever 7 and outputting a restart door signal.
When an obstacle existing between the pair of car doors 2 hits the operating body 6 during the door closing operation, the operating body 6 is retracted and the lever 7 is moved.
And the switch 8 outputs a reopening signal from the switch 8 to change the car door 2 from the closing operation to the opening operation.

In this embodiment, the car door 2
A safety device using infrared rays is attached to the car door 2 to detect whether or not an obstacle exists in the traveling direction of the car door 2 at the time of closing the door by an optical signal, thereby enhancing the safety of the elevator entrance. This safety device comprises a pair of car doors 2
Each of the seats 1 having the same thickness as the folded end 2a and extending in the up and down direction near the folded end 2a on the opening / closing end side of the seat 1.
1 and a light emitting device 9a and a light receiving device 9b of a photoelectric device (infrared sensor) are attached to each seat 11, respectively.
The optical path 10 determines whether or not an obstacle exists between the pair of car doors 2.
Is detected depending on whether or not is interrupted. That is, if an obstacle exists between the pair of car doors 2, light (infrared rays) emitted from the light projector 9a to the predetermined optical path 10 does not reach the corresponding light receiver 9b. The presence or absence of an obstacle can be detected based on the output signal, and when an obstacle is detected, the door closing operation is immediately stopped to open the car door 2. The seat 11 is fixed to the reinforcing member 5 at a position where the adjacent folded end 2a is extended to the side opposite to the opening / closing end. The seat 11 is provided with an upright portion 11 which is bent in a direction in which the seat 11 stands upright with respect to the reinforcing member 5.
a.

That is, when attaching the projector 9a and the receiver 9b of the safety device to the car door 2, first, the reinforcing member 5
The seat 11 is brought into contact with a position adjacent to the folded end portion 2a on the open / close end side on the outer surface of the open / close end side, and the seat 11 is fixed to the reinforcing member 5 using a dish rivet (not shown) or the like. . Next, the projector 9a or the light receiver 9b is fixed to the seat 11 with screws 12 using a mounting hole (not shown) provided in the seat 11 in advance, so that the mounting to the car door 2 is completed. I do. In this state, the upright portion 11a of the seat 11 is located behind the light projector 9a and the light receiver 9b supported by the seat 11.

As described above, the safety device for the entrance of the elevator according to the present embodiment has the light emitting device 9a even if the folded end 2a of the car door 2 is narrow and there is no space for mounting the light emitting device 9a and the light receiving device 9b of the photoelectric device. And the light receiver 9b are fixed to the reinforcing member 5 with the seat 11 having the same plate thickness as that of the folded end 2a interposed therebetween. It can be applied to the door 2 without any trouble. In other words, this safety measure is to support the projector 9a and the light receiver 9b with both the seat 11 and the folded end 2a even when the folded end 2a of the existing car door 2 is too narrow to secure a mounting space there. Since it can be attached to a desired portion (in the vicinity of the open / close end on the back side of the car door 2) in a stable posture, it is not necessary to replace the car door 2 with another one. Therefore, this safety device can be easily and inexpensively applied to an existing elevator.

As is well known, the projector 9a and the light receiver 9
A precision electronic component such as a diode or a printed wiring board is incorporated in the inside of the b. As described above, the seat 11 is provided with the upright portion 11a that is bent in the direction in which it rises with respect to the reinforcing member 5. Since the seat 11 is provided, the mechanical strength of the seat 11 is high, and therefore, even if an impact or the like is applied, it is unlikely that the projector 9a and the light receiver 9b will be adversely affected such as to cause a failure.

In the above-described embodiment, a center-open type elevator in which the pair of car doors 2 are slid in opposite directions has been described as an example. However, it is needless to say that the present invention can be applied to a single-open type elevator. In this case, one of the light emitter 9a and the light receiver 9b may be attached to a desired portion of the car door 2, and the other may be attached to the door stop of the pillar of the car 1.

[0016]

The safety device for an elevator entrance according to the present invention is embodied in the form described above, and has the following effects.

Since the components (light emitter and light receiver) of the photoelectric device are fixed to the reinforcing member of the car door with the seat having the same thickness as the folded end of the car door interposed therebetween,
Even if the folded end portion is narrow, the component device can be attached to a desired portion in a stable posture supported by a seat arranged adjacent to the folded end portion. Therefore, this safety device can easily and inexpensively improve the safety of an elevator entrance / exit as compared with the related art in which the existing car door has to be replaced because there is no mounting space.

Further, if the seat is provided with an upright portion bent in a direction to stand upright with respect to the reinforcing member, the mechanical strength of the seat is increased, and the seat is configured even if an impact or the like is applied. This is preferable because adverse effects on equipment are less likely to occur.

[Brief description of the drawings]

FIG. 1 is a front view of a car door provided with a safety device for an elevator entrance according to an embodiment of the present invention, as viewed from a landing side.

FIG. 2 is a cross-sectional view of the safety device and its peripheral portion as viewed along line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding car 2 Car door 2a Folded end 3 Landing 4 Landing door 5 Reinforcement 6 Operating body 9a Floodlight 9b Light receiver 10 Optical path 11 Seat 11a Standing part

Claims (3)

(57) [Claims] 1. A car door in which the left and right sides are folded back to the rear as viewed from the inside of the car, and the car door to which the folded ends are connected by a reinforcing member is slid in the left and right direction. A safety device which is installed at an entrance of an elevator where a car is opened and closed and which can detect an obstacle at an open / close end of the car door by attaching a component of a photoelectric device to the car door, A seat having the same thickness as the folded end and extending in the up-down direction is disposed at a position where the folded end is extended to the side opposite to the opened / closed end near the folded end on the opening / closing end. A safety device for an elevator doorway, wherein the device is attached to the reinforcing member, and the component device is attached to the seat behind the car door. 2. The safety device according to claim 1, wherein the component device of the photoelectric device is a light projector or a light receiver. 3. The safety device for an elevator doorway according to claim 1, wherein the seat has an upright portion bent in a direction to stand upright with respect to the reinforcing member.