JPS63208492A - Safety device for escalator - 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] [Effect of the invention] (Industrial application field) The present invention relates to a safety device for an escalator.

(Prior Art) Generally, as shown in FIG. 5, an escalator includes an endless step 2 that runs continuously between the upper and lower entrances 1 and 1, and handrails 3 provided on both sides of the step 2. It consists of a moving handrail 4 that moves at the same speed and in the same direction as the steps 2, and these are installed between the floors 5 and 6 on the lower and upper floors of the building.
=I is used to transport passengers between the upper and lower entrances 1 and 1.

In order to reduce the installation area of this type of escalator, the upper floor 6 of the building and the handrail 4 are often installed close to each other.
A triangular space 7 is formed between the handrail 4 and the moving handrail 4. Therefore, if a passenger leans a part of his or her body outside the moving handrail 4 while the escalator is operating upward, there is a risk that the passenger will be caught in the triangular space 7 described above. This also applies to a triangular space (not shown) formed between the exterior of one escalator and the moving handrail of the other escalator, which are installed adjacently and intersectingly.

Therefore, in order to prevent passengers' bodies from getting caught in such triangular space 7, conventionally, as shown in FIGS. 6(a) and 6(b), a A triangular guard plate 8 is suspended or supported from a fixed part of the parapet 3 on the floor 6 or the movable handrail 4 side.

As a result, in the event that a passenger leans out of the moving handrail 4 and approaches the apex force of the triangular space 7, part of the passenger may come into contact with the guard plate 8, thereby posing danger to the passenger. Inform the passenger to return the body to a normal state, or as shown in Figure 6(b), if the tip of the guard plate 8 comes into contact with the passenger's body, A safety switch 10 is installed to stop the escalator in an emergency.

On the other hand, recently, as shown in FIG.
An energy flux generating device 11 such as a photoelectric switch is installed between the outside of the escalator's handrail 3 and the upper floor 6 of the building, and an alarm is issued when the energy flux is interrupted, or the escalator is activated. Measures are being taken to stop it.

Furthermore, a photoelectric switch is provided in front of the guard plate 8,
There are also devices that detect and issue a warning before a passenger comes into contact with the triangular guard plate 8.

(Problems to be Solved by the Invention) However, among such conventional escalator safety devices, the one that only provides the guard plate 8 in the triangular space 7 shown in FIG. It was not sufficient to ensure the safety of passengers.

Furthermore, in the case of the conventional escalator safety device shown in FIG. 6(b), since the switch 10 is provided on the guard plate 8, the wiring 12 for the switch 10 is done outside the escalator body. However, there was a problem that the design of the escalator was impaired.

Furthermore, in the case of the conventional example shown in FIG. 7, the distance between the top and bottom of the triangular space 7 is long, so the reflector 13 is provided on the ceiling side. There was a technical problem in that adjustment was difficult. In addition, passengers often intentionally touch the reflector, causing malfunctions, and the design of the ceiling was also compromised.

Therefore, in the case of conventional examples, there are some that use a photoelectric switch for measuring distance m without using a reflector, but with such a photoelectric switch, the distance traveled by the light beam is limited. Because of this limitation, when detecting a long-distance area such as the triangular space 7, the detection sensitivity is poor and the operation becomes unstable.

Furthermore, in the case of a safety device in which a photoelectric switch is provided in front of the guard plate 8, there is a problem in that a simple act of putting a hand out of the handrail causes a detection operation, resulting in an extremely large number of malfunctions.

This invention was made to solve the above-mentioned conventional problems, and its purpose is to reduce the probability of malfunction of the device without compromising the design of the escalator, and to prevent passengers from being in real danger. To provide a highly reliable escalator safety device capable of quickly stopping an escalator only when the situation is such that the safety of passengers is ensured.

[Structure of the Invention] (Means for Solving the Problems) The escalator safety device of the present invention is provided at the intersection between the moving handrail of the escalator and the upper floor of the building or the exterior of another adjacent escalator. A guard plate is suspended in the triangular space formed, a detection plate of a predetermined width is provided on the bottom of the guard plate, and an optical sensor that constantly detects the distance to this detection plate is installed inside the escalator. A safety stop circuit is provided below the detection plate, and when the optical sensor detects that the distance to the detection plate has exceeded the permissible range, it receives the detection signal and makes an emergency stop of the escalator. be.

(Function) In the escalator safety device of the present invention, when the guard plate in the triangular space moves beyond a certain distance and the distance to the detection plate becomes larger than the allowable range, the safety stop circuit activates the escalator. The train will be stopped to ensure the safety of passengers.

In addition, even if a passenger touches the guard plate, the passenger immediately notices it and withdraws, or the guard plate is slightly shaken as a prank, and the movement of the guard plate is small within the allowable range. When this is the case, the safety stop circuit is not activated, and the possibility of malfunction can be kept low.

(Example) Hereinafter, embodiments of the present invention will be explained in detail based on the drawings.

1 and 2 show an example of the present invention. As explained in the conventional example, an escalator usually has endless steps 2 that continuously operate between the upper and lower entrances 21 and 21.
2, a handrail 23 provided on both sides of the step 22, and a moving handrail 24 that moves at the same speed and in the same direction as the step 22, and these are connected to the lower floor and upper floor of the building. Installed between 25 and 26, the upper and lower entrances and exits 2
Transport passengers between 1.21 and 21.

In an escalator with such a configuration, the floor 2 on the upper floor side
A guard plate 28 is suspended in a triangular space 27 formed at the intersection of the lower surface of the handrail 6 and the movable handrail 24. A detection plate 30 whose periphery is covered with a rubber elastic body 29 is attached to the bottom surface of the guard plate 28 . This detection plate 30 has a necessary and sufficient width W to prevent malfunction.

On the other hand, a space 34 sandwiched between the inner ledge 31 and outer ledge 32 at the lower part of the escalator's handrail 23 and the main body frame 33
An optical sensor 35 is installed in the.

The detailed structure of the detection plate 30 and this optical sensor 35 is shown in FIG. This optical sensor 35 is a photoelectric detection switch for distance measurement, and includes a light emitting element 36 that emits light toward the detection plate 30, and a luminous flux 37 from the light emitting element 36.
a light projecting lens 38 that narrows down the light, a light receiving lens 40 that collects a part 39 of the light diffusely reflected by the detection plate 30, and a position detecting element 41 that detects the light that passes through the light receiving lens 40. It is made up of.

The optical sensor 35 focuses the light beam 37 emitted from the light emitting element 36 using a projection lens 38 and irradiates it onto the surface of the detection plate 30 . Then, 39 which was diffusely reflected by the detection plate 30
passes through the light receiving lens 40 and forms a spot of light on the position detection element 41. At this point, as shown in FIG. 3, when the detection plate 30 is located at a relatively short distance A, the position detection element 4
A spot is created at point a on 1, and the detection plate 30 is placed at a long distance 11B.
, a light spot is created at point h on the position detection element 41.

The position detection element 41 has the property of changing the magnitude of the current flowing depending on the position of the spotlight between the poles 42 and 43, converts the detection distance into a current value, and the current value is a set current corresponding to the set distance. It is possible to determine whether the detection plate 30 is within the set distance depending on whether the distance is larger or smaller than .

Therefore, as will be described later, by operating the position detection switch in accordance with the output of the position detection element 41 of the optical sensor 35, the safety stop circuit is activated -8= and the escalator can be brought to an emergency stop.

FIG. 4 shows a safety stop circuit 44 for performing an emergency stop operation in the event that a passenger on the escalator leans out into the triangular space 27, contacts the guard plate 28, and is at risk of getting his or her neck caught. It shows. This safety stop circuit 44
A rising relay 46 and a descending relay 47 are connected in series to the up and down sides of the escalator's rising and descending operation starting switch 45, respectively. For these ascending relays 46 and descending relays 47, ascending relay contacts 46a and descending relay contacts 47a are provided in parallel with the starting switch 45, and these relay contacts 46a
, 4.7a are commonly connected to a stop button switch 48.

Furthermore, a position detection switch 49 operated by the position detection element 41 and an abnormal stop relay 50 are connected in series between the power supplies. A relay contact 50a of this abnormal stop relay 50 is inserted in series in the connection line between the starting switch 45 and the rising relay 46.

The operation of the escalator safety device having the above configuration will be described next.

In a normal state, a light beam 37 from a light emitting element 36 is irradiated onto a detection plate 30, and three portions of the light reflected here pass through a light receiving lens 40 to detect a position detection element. A light spot is created at point 410 a.The output current of the light detection cable 41 in this normal state becomes so large that the light sensor setting 49 in the safety circuit shown in FIG. 4 is closed.

Therefore, in the safety circuit 44, the emergency stop relay 5
0 is placed in the 1 state and its relay contact 50a is also closed.

When the escalator start switch 45 is turned on to the upward side, the relay contact 50a of the emergency stop relay 50 is closed, so current flows to the upward relay 46, and the upper back relay contact 4.68 is also closed, causing the escalator to will start the upward movement.

If the escalator is currently in ascending operation and a passenger is leaning over the moving handrail 24, the passenger will come into contact with the guard plate 28 provided in the triangular space 27.

This causes the guard plate 28 to move. However, if a passenger comes into contact with the guard plate 28 and withdraws in haste, the detection plate 30 provided on the bottom surface of the guard plate 28 is always activated by the optical sensor 30 provided inside the handrail 23.
Since the distance is measured by and this detection plate 30 has a width W sufficient to prevent malfunction, the movement of the guard plate 28 is smaller than the width W, and the optical sensor 35 It is possible to follow the movement of 28,
It will not work.

However, due to passenger contact, the guard plate 28 may move more than the detection range of the optical sensor 35. In such a case, there is a risk that passengers will be caught in the triangular space 27, so the safety stop circuit 44 will operate as follows to perform an emergency stop of the escalator.

In the optical sensor 35 shown in FIG. 3, if the position of the detection plate 30 now reaches a distance B and deviates far from the set position C, the spot b will also deviate from the set position O. Therefore, the current from the position detecting cable 41 becomes smaller than the set current for the spot C, and the position detecting switch 49 of the safety stop circuit 44 is opened.

As a result, the emergency stop relay 50 is deenergized and its relay contact 50a is also opened. Therefore, the series line between the starting switch 45 and the ascending relay 46 becomes open.
The ascending relay contact 46a is also opened, the escalator comes to an emergency stop, and the safety of passengers is ensured.

In this way, when the escalator is in ascending operation, a passenger is leaning out far beyond the moving handrail 24 and comes into contact with the guard plate 28 in the triangular space 27, causing the card plate 28 to move significantly. When there is a dangerous situation, the optical sensor 35 detects the abnormality and activates the safety stop circuit 4.
4 is activated to make an emergency stop of the escalator and ensure the safety of passengers (2).

However, the guard plate 28 was simply damaged due to a mischief caused by a passenger.
If the sensor plate 30 is touched and slightly shaken, since the detection plate 30 has an allowable range of width W, an emergency stop operation is not performed, and a malfunction can be prevented.

[Effects of the Invention] As described above, according to the present invention, a detection plate having a predetermined width is provided on the guard plate, and the distance to this detection plate is constantly detected by the optical sensor provided on the escalator side. Since the escalator will come to an emergency stop if the escalator moves too far beyond the allowable range, if a passenger mischievously shakes the guard plate slightly, there will be no emergency stop, and the occurrence of malfunctions will be minimized. It can be suppressed. In addition, since an optical sensor is installed inside the escalator at a position below the detection plate installed on the bottom of the guard plate, wiring can be done inside the escalator where passengers cannot see it, making it safer. The design is not impaired by the wiring for the stop circuit.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. 3 is an optical explanatory diagram showing the configuration of the optical sensor used in the above embodiment. FIG. 4 is a circuit diagram showing the configuration of the safety stop circuit used in the above embodiment, FIG. 5 is a front view showing the configuration of a general escalator,
Fig. 6(a) is an enlarged front view showing a conventional example, Fig. 6(b)
) is an enlarged front view showing another conventional example, and FIG. 7 is a front view showing still another conventional example. 22... Steps 23... Balustrade 24... Moving handrail 25.26... Floor 27... Triangular space 28... Guard plate 30... Detection plate 35... Optical sensor 44 ...safety stop circuit

Claims (1)

[Claims] A guard plate is suspended in the triangular space formed at the intersection of the escalator's moving handrail and the upper floor of the building or the exterior of another adjacent escalator, and a predetermined width is attached to the bottom of the guard plate. A detection plate is provided, an optical sensor is provided inside the escalator at a position below the detection plate, and the optical sensor is set to constantly detect the distance to the detection plate, and the optical sensor is configured to detect the detection plate. A safety device for an escalator, comprising a safety stop circuit that emergencyly stops the escalator in response to a detection signal when it is detected that the distance to the board has exceeded an allowable range.