JPH0812239A - Nipping preventive device for delta part of escalator - Google Patents

Abstract

PURPOSE:To prevent such an accident with escalator that a passenger is pinched in his neck etc., in the delta part of escalator and also avoid tumbling of other passengers. CONSTITUTION:When any physical part of a passenger touches a contact rod 10 installed on a triangular plate 4, a displacement, is made, and the first switch 12 and second switch 13 are operated in two steps, and upon actuating an alarm buzzer, the escalator is stopped operating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an escalator for preventing an accident in which a passenger of the escalator has his or her neck caught in a delta portion formed in a moving handrail of the escalator and an opening portion provided in a ceiling or floor of a building. The present invention relates to a device for preventing a delta part from being pinched.

[0002]

2. Description of the Related Art FIG. 8 is an overall configuration diagram showing a schematic configuration of a conventional escalator. The part where the moving handrail 1 of the escalator intersects with the openings such as the ceiling and floor 2 of the building is called a delta part 3. Children, etc. get on the escalator,
If you do not notice that you are approaching the delta part 3 with your arm or neck out of the moving handrail 1, a serious accident will occur in which your neck or arm is pinched by the delta part 3. In order to prevent the occurrence of such an accident, conventionally, a triangle plate 4 called a delta guard is installed in the delta part 3 to alert the user not to cause an accident such as a neck being caught. . 5 is an upper machine room.

In Japanese Utility Model Laid-Open No. 62-173375, a contact body elastically supported near the triangular plate is provided.
There is a description of an escalator safety device which is provided with a detection switch that operates by tilting the contact body.

[0004]

In the above-mentioned conventional escalator, the triangular plate 4 is provided to call attention so that passengers do not get their necks caught in the delta portion 3. Even if there was, there was a problem that the arm and neck were kept out of the moving handrail 1 without noticing that the delta part 3 was approached, and the neck and arm were pinched by the delta part 3. Also, the escalator does not stop even if it is caught, and the operation is continued, which is extremely dangerous.

On the other hand, in the structure provided with the detection switch which is activated by the inclination of the contact body, when the escalator suddenly stops due to an accident, mischief or the like, an unexpected passenger may fall and cause another disaster. was there.

Therefore, the problem to be solved by the present invention is to give an alarm of abnormal occurrence first when the passenger's arm or neck of the escalator comes into contact with the triangular plate, and then stop the operation of the escalator to stop the arm or neck. It is an object of the present invention to provide a device for preventing a passenger from being caught in an escalator delta portion, which can prevent a passenger from being caught in the vehicle and prevent a passenger from falling over.

[0007]

A device for preventing pinching of an escalator delta portion according to the present invention is provided with a contact rod formed horizontally displaceable on the front end side of a triangular plate provided in the delta portion of the escalator, and A first switch and a second switch are provided on the triangular plate, and the alarm means is activated by activating the first switch at the first stage of horizontal displacement of the contact rod. Further, the operation of the escalator is stopped by operating the second switch in the second stage of horizontal displacement of the contact rod.

The first switch and the second switch are photoelectric switches.

Further, the pushing plate attached to the arm is a fan-shaped cam.

Further, there are provided a spring for holding the contact rod on the triangular plate, and a first switch actuating rod for transmitting the horizontal displacement of the contact rod caused by the deformation of the spring to the first switch and actuating the first switch.

[0011]

In the escalator delta pinch prevention device according to the present invention, the passenger's body comes into contact with the contact rod installed on the triangular plate and is displaced to operate the safety switch consisting of the first switch and the second switch in two steps. Let The first in the first stage
The switch is activated, and alarm means such as an alarm buzzer sounds. Then, when the contact rod is further strongly pushed and displaced, the second stage operation is started and the second switch is activated to stop the operation of the escalator and prevent the delta portion from being pinched.

Further, by constructing the first switch and the second switch with photoelectric switches, the number of mechanical operation parts is reduced, and more stable operation is realized for a long period of time.

Further, by using a fan-shaped cam instead of the push plate attached to the arm, the operating piece of the first switch can be constantly pressed by a constant amount even if the contact rod is largely displaced. The life of the switch is extended.

Further, the contact rod is held by a spring, and the displacement of the contact rod due to the deformation of the spring causes
A first switch actuation rod actuates the first switch,
Sound the alarm means.

[0015]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall configuration diagram showing a schematic configuration of a device for preventing pinching of an escalator delta portion according to the present invention. In the figure, the structure of the moving handrail 1, the ceiling or floor 2, the delta part 3, the triangular plate 4, and the upper machine room 5 is the same as that of the conventional example shown in FIG. 8 already described. The same components are used and the description thereof is omitted.

A contact rod 10 is provided on the front end side of the triangular plate 4 provided in the delta portion 3. As shown in FIG.
The contact rod 10 is held by the triangular plate 4 via the arm 11 and can be displaced in the horizontal direction as the arm 11 rotates. Further, a first switch 12 and a second switch 13 are attached to the triangular plate 4, and the operating piece of the first switch 12 is pressed by a pressing plate 14 fixed to the arm 11 so as to operate. .

The movable portion 13a and the fixed portion 13b of the second switch 13 are connected via a spring 15 as an elastic urging means, and the movable portion 13a is constantly urged in the direction of the contact rod 10 by the spring 15. Has been done. Contact rod 1
The actuator 13c of the second switch 13 is configured to operate by the displacement of the movable portion 13a with the displacement of 0. First switch 12 and second switch 1
3 is a buzzer circuit section 18 and an operation control section 1 provided in the upper machine room 5 via control cables 16 and 17, respectively.
9 and 9 are electrically connected. The buzzer circuit section 18
It is electrically connected to an alarm buzzer 20 as an alarm means.

FIG. 4 shows the switch section 1 in this embodiment.
2 is an electric circuit diagram showing an electric connection state of the buzzer circuit unit 18, the operation control unit 19, the alarm buzzer 20 and the like. The contact 12A of the first switch 12 is connected in series to the buzzer circuit section 18.

The contact 13A of the second switch 13 is connected in series to the coil of the detection relay 21 forming a part of the operation control section 19, and the break contact 21B of the detection relay 21 is connected in series to the circuit of the operation control relay 22. ing.

Next, the operation of this embodiment will be described.
When the arm or neck of the passenger of the escalator contacts the contact rod 10 provided on the triangular plate 4, the contact rod 10 is displaced to the right as shown in FIG. Activates the first switch 12. As a result, a signal for closing the contact 13A is sent to the buzzer circuit section 18 installed in the upper machine room 5 via the control cable 16 to cause the alarm buzzer 20 provided in the delta section 3 to ring.

The contact rod 10 is strongly pressed, and the spring 15
When, for example, a force of 10 kg or more is applied and the displacement further occurs, the contact rod 10 comes into contact with the second switch 13 and the second switch 13 operates. Then, the contact 13A of FIG. 4 is closed and the detection relay 21 of the operation control unit 19 is turned on, the break contact 21B of the detection relay 21 is opened, the coil current of the operation control relay 22 is cut off, and the escalator operates. Stop.

As described above, in this embodiment, the first switch 12 and the second switch 13 attached to the triangular plate 4 are actuated to cause the alarm buzzer 20 to sound to notify the passenger of the occurrence of the abnormal condition. The escalator is stopped if necessary to prevent a trapped accident in the delta part 3. Since the warning buzzer 20 is used to call attention in advance, it is possible to avoid an accident in which another passenger falls due to a sudden stop of the escalator.

Embodiment 2 FIG. In the first embodiment, the first switch 12 and the second switch 13 are mechanical contact switches, but in the present embodiment shown in FIG. 5, the portion corresponding to the first switch 12 is the triangular plate 4. It is composed of a fixed photoelectric switch 23 and a reflecting mirror 24 fixed to the contact rod 10. The portion corresponding to the second switch 13 is composed of the photoelectric switch 25 and the light shielding plate 26.

In the present embodiment, when the contact rod 10 is displaced due to contact with a part of the passenger's body or the like, the reflecting mirror 24 fixed to the contact rod 10 is displaced, and the photoelectric switch 23 is operated to operate. Sound the alarm buzzer similar to 1. Further, when the contact rod 10 further moves and pushes in the light shielding plate 26, the photoelectric switch 25 operates to stop the operation of the escalator.

In the structure of this embodiment, since photoelectric switches are used as the first and second switches, the structure is simplified, the cost can be reduced, and the failure is less likely to occur and the life is extended. To be achieved.

Example 3. In this embodiment shown in FIG.
A fan-shaped cam 27 is provided at the tip of the arm 11 in place of the push plate 14 for operating the first switch 12 adopted in 1.

In the first embodiment, if the contact rod 10 is further pressed after the first switch 12 is operated, the operating piece of the first switch 12 is further pressed, and there is a risk of damage. However, according to this embodiment, the first switch 1
Even if the contact rod 10 is further displaced after the operation of 2, the operation piece of the first switch 12 is not pushed beyond a certain amount due to the structure in which the fan-shaped cam 27 is attached to the arm 11. Therefore, it is possible to realize a device with few failures and high reliability.

Example 5. In the fifth embodiment, the contact rod 10 is held on the triangular plate 4 by the spring 28, and the first switch actuation rod 29 for actuating the first switch 12 is fixed to the contact rod 10. There is.

According to the structure of the present embodiment, the crank mechanism for holding the contact rod 10 employed in the first embodiment is unnecessary, so that the structure is simple and the cost can be reduced.

[0030]

As described above, according to the present invention,
The passenger's body comes into contact with the contact rod installed on the triangular plate and is displaced to sequentially operate the first switch and the second switch in two steps, and after the alarm buzzer sounds, the operation of the escalator is stopped. It is possible to prevent a passenger's neck from being caught in the delta part of the escalator. Further, it is possible to avoid a fall accident of other passengers due to a sudden stop of the escalator due to an accident or mischief.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an enlarged explanatory diagram showing a configuration of a pinch detection unit of the apparatus of FIG.

FIG. 3 is an explanatory diagram showing an operation of a portion of FIG.

FIG. 4 is an electric circuit diagram showing an electric circuit configuration of the apparatus of FIG.

FIG. 5 is an explanatory diagram showing a configuration of a pinch detection unit according to the second embodiment of the present invention.

FIG. 6 is an enlarged view of a main part showing a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a configuration of a pinch detection portion according to a fourth embodiment of the present invention.

FIG. 8 is an overall configuration diagram of a conventional device.

[Explanation of symbols]

 1 Moving handrail 2 Ceiling and floor 3 Delta part 4 Triangular plate 5 Upper machine room 10 Contact rod 11 Arm 12 First switch 13 Second switch 14 Push plate 15 Spring 16, 17 Control cable 18 Buzzer circuit part 19 Operation control part 20 Alarm buzzer 21 Detection Relay 22 Operation Control Relay 23 Photoelectric Switch 24 Reflector 25 Photoelectric Switch 26 Light-Shielding Plate 27 Fan-Shaped Cam 28 Spring 29 Actuator Rod for First Switch

Claims (4)

[Claims] 1. A contact rod formed so as to be horizontally displaceable on a front end side of a triangular plate provided in a delta portion of an escalator, and a first switch and a second switch are provided on the triangular plate, and the horizontal displacement of the contact rod is provided. The alarm means is activated by the operation of the first switch in the first step of the above, and the operation of the escalator is stopped by the operation of the second switch in the second step of the horizontal displacement of the contact rod. A device for preventing the escalator delta from being pinched. 2. The pinch prevention device for an escalator delta portion according to claim 1, wherein the first switch and the second switch are photoelectric switches. 3. The escalator delta portion according to claim 1, wherein the arm holding the contact rod and rotating in association with the displacement of the contact rod is provided with a fan-shaped cam for activating the first switch. Prevention device. 4. A spring for holding the contact rod on a triangular plate, and a first switch actuating rod for transmitting the horizontal displacement of the contact rod caused by deformation of the spring to the first switch to actuate the first switch. A device for preventing the escalator delta from being pinched.