JPH1149462A - Safety device for elevator entrance and exit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device of an elevator entrance and exit which is capable of surely detecting an obstacle which is small in a thickness dimension in the vertical direction, without requiring an increase in the total number of a non-contact sensor. SOLUTION: By improving detection accuracy by narrowing each disposition interval of diodes 11a to 11g of a light projecting device 5 and a light receiving body 17 of a light receiving device 6 in a prescribed height area according to a detection object, a deck is detected by the diodes 11a to 11g and the light receiving body 17, even if an obstacle located in the prescribed height area is this deck which is small in a thickness dimension in the vertical direction. By increasing the disposition intervals of the diodes 11g to 11z and the light receiving body 17 of the light receiving device 6 in other height areas, the number of the diodes 11g to 11z is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a safety device for an elevator entrance having a car door and a landing door,
More particularly, the present invention relates to a safety device for an elevator entrance provided with a plurality of non-contact sensors for detecting an obstacle.

[0002]

2. Description of the Related Art FIG. 4 is a view of a conventional car door provided with a safety device for an entrance and exit of a car viewed from a landing side, FIG. 5 is a cross-sectional view of the car door and the landing door of FIG. 4, and FIG. FIG. 7 is a longitudinal sectional view illustrating a safety device at an entrance, FIG. 7 is a plan view of an elevator entrance, and FIG. 8 is a side view of a car door and a landing door as viewed from a portion A in FIG.

In general, a pair of car doors 2 and 2a are provided in a car 1 at an elevator entrance as shown in FIG. 7, and a pair of hall doors 4 and 4 which can be linked with the car doors 2 and 2a are provided in a hall 3. 4a is provided.

A safety device provided at such an elevator entrance is, for example, an infrared detection device as described in Japanese Patent Application Laid-Open No. Hei 8-199856. One of the safety devices is as shown in FIGS. A floodlight 5 installed at a height that does not hinder the door opening and closing, for example, about 10 mm from the car sill 2b, and near the tip of the car door 2a (a so-called door stop side end); It is installed near the tip of the car door 2 and has a light receiver 5 and a light receiver 6 facing the light projector 5. As shown in FIG. 4, the light emitter 5 and the light receiver 6 are formed over almost the entire height of the elevator entrance, and detect an obstacle (not shown) interposed between the car doors 2 and 2a.

[0005] As shown in FIG.
A case 8 having an opening 7 which is attached to the back side of the tip of one of the car doors 2a and faces the light receiver 6;
A transparent plate, for example, an acrylic plate 9 and a case 8
Printed circuit board 10 built in
A plurality of light emitters arranged on 0, for example, a diode group 1
1 mainly. As shown in FIG. 6, the case 8 has a height of about 2000 mm and a width of about 40 mm.
mm and the thickness are set to about 10 mm. The lowermost part of the plurality of diode groups 11 is, for example, 25
It is provided at a height position of about mm and is arranged at an equal interval of about 45 mm upward from this height position.
In addition, a wiring 12 is connected to the diode group 11 via a printed circuit board 10.

Similarly, as shown in FIG. 5, the above-mentioned light receiver 6 is attached to the back side of the front end of the other car door 2 and has a case 14 having an opening 13 facing the light projector 5.
A transparent plate, for example, an acrylic plate 15 mounted on the opening 13, a printed circuit board 16 built in the case 14,
A plurality of photoreceptors 17 arranged on the printed board 16
It is mainly composed of The case 14 of the light receiver 6 is also set to have a height of about 2000 mm, a width of about 40 mm, and a thickness of about 10 mm. Each of the photoreceptors 17 is arranged at the same height position as each of the diode groups 11 of the light emitter 5, and is provided with a wiring 18 via a printed board 16.
Is connected.

In the conventional safety device constructed as described above, infrared rays 19 are emitted in the horizontal direction from the diode group 11 of the light projector 5 to the light receiver 6 via the acrylic plate 9, and the infrared rays 19 are transmitted to the car door. After traversing the gaps at the respective ends of 2a and 2a, the light passes through the acrylic plate 15 and enters the light receiver 6, so that the light
9 is detected. And car door 2,
When an obstacle (not shown) intervenes at each end of 2a, the obstacle blocks the infrared rays 19, and at least some of the photoreceptors 17 do not detect the infrared rays 19. Is output.

[0008]

By the way, in the above-described conventional safety device for the entrance and exit of the elevator, the diode group 11 of the light emitter 5 and the light receiver 17 of the light receiver 6 are arranged at equal intervals, and the arrangement intervals are relatively large. Therefore, there is a problem that it is difficult to detect an obstacle having a small vertical thickness. For example, when a passenger pushes the cart 30 shown in FIG.
When the height is 130 mm from the car threshold 2b and the thickness in the vertical direction is 35 mm, the infrared rays 19 are 35 mm, 80 mm, 125 mm, and 170 m from the car threshold 2b.
m, the loading platform 31 is located between the third infrared ray 19 and the fourth infrared ray 19 from the bottom, and the loading platform 31 can be detected. As a result, the loading platform 31 is detected.
There is a concern that the car may be caught between the car doors 2 and 2a and between the landing doors 4 and 4a.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to provide an obstacle having a small vertical thickness without increasing the total number of non-contact sensors. Is to provide a safety device for an elevator doorway that can reliably detect an elevator.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a plurality of non-contact sensors for detecting obstacles at almost the entire height of an entrance and exit of an elevator having a car door and a landing door. In the safety device for an elevator entrance, the plurality of non-contact sensors are arranged at unequal intervals in the vertical direction.

In the present invention configured as described above, the non-contact sensors are arranged at relatively small intervals in a predetermined height region in accordance with an object to be detected, thereby improving the detection accuracy. Even if the detection target located in the predetermined height region is an obstacle having a small vertical thickness, it can be reliably detected by the non-contact sensors arranged at relatively small intervals. Further, in the other height area different from the predetermined height area, by disposing the non-contact sensors at relatively wide intervals, it is not necessary to increase the total number of these non-contact sensors. I'm done.

[0012]

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 longitudinal sectional view showing a safety device for an elevator doorway according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of an elevator doorway provided with a safety device of this embodiment. 1 and 2, the same components as those shown in FIGS. 4 to 8 are denoted by the same reference numerals. That is, 1 is a car, 2
a is a car door, 2b is a car threshold, 3 is a landing, 4a is a landing door, 5 is a floodlight, 6 is a light receiver, 7 is an opening, 8 is a case, 9 is an acrylic plate, 10 is a printed circuit board, and 11 is a diode group. , 12 are wirings, 13 is an opening, 14 is a case, 1
5 is an acrylic plate, 16 is a printed circuit board, 17 is a photoreceptor,
18 is a wiring, and 19 is an infrared ray.

The safety device of the present embodiment shown in FIG. 1 has a plurality of diode groups 1 compared to the above-described conventional safety device.
The difference is that the lower intervals between the first and the light receivers 17 are set to be closer than the upper intervals, and the other configurations are basically the same. For example, the first diode 11a from the bottom is arranged 25 mm above the lower end of the case 8, and the arrangement interval from the diode 11a to the seventh diode 11g is set to about 20 mm, respectively. The arrangement interval from 11g to the 40th (uppermost) diode 11z is set to about 50 mm.

In this embodiment, for example, when a passenger tries to get into the car 1 by pushing the bogie 30 shown in FIG.
The bed 31 of this cart 30 is 130m from the car threshold 2b
m and the thickness in the vertical direction is 35 mm, the infrared rays emitted from the diode 11f located at a height of 135 mm from the car threshold 2b and another diode 11g located at a height of 155 mm. 19 is blocked by the loading platform 31, and the infrared rays 1
9 is not detected, a detection signal is output from the light receiver 6,
As a result, it is possible to prevent an accident in which the carrier 31 is caught between the car doors 2 and 2a and between the landing doors 4 and 4a.

In the embodiment configured as described above, the diodes 11a to 11g are provided in a predetermined height region (that is, a height region of 35 to 155 mm from the car sill 2b) according to an object such as the bed 31 to be detected. , The obstacles such as the bed 31 having a small vertical thickness can be reliably detected, and other height regions (that is, a height region of 155 to 1805 mm from the car threshold 2b) can be detected. By expanding the arrangement intervals of the diodes 11g to 11z, it is not necessary to increase the total number of the diodes 11a to 11z.

In this embodiment, the lowermost diode 11a is disposed 25 mm above the lower end of the case 8, and the distance between the diode 11a and the seventh diode 11g is set to about 20 mm. 7
The 40th diode 11 to the 40th diode 11g
The arrangement intervals up to z are set to about 50 mm, respectively, but the present invention is not limited to this, and a predetermined arrangement interval and a predetermined number of diodes can be set according to an object to be detected.

FIG. 3 is an explanatory view of an elevator entrance provided with a safety device according to another embodiment of the present invention. In addition,
In FIG. 3, the same components as those shown in FIGS. 1, 2, and 4 to 8 described above are denoted by the same reference numerals.

The safety device according to the present embodiment shown in FIG. 3 is different from those shown in FIGS. 1 and 2 in that the distance between the first diode 11a from the bottom and the nineteenth diode 11m is 50 mm. The 19th diode 11m to the 34th diode 11r
Are set to about 20 mm, and the arrangement intervals above the 34th diode 11r are set to about 100 mm, respectively, and other configurations are the same.

In this embodiment, for example, when a patient's stretcher 40, which is frequently used in a hospital, is to be carried into the car 1, the carrier 41 of the stretcher 40 is moved up and down at a height of 1000 mm from the car sill 2b. 1005m from the car sill 2b if the thickness of the car is 35mm
The infrared rays 19 emitted from the diode 11n located at the height of m and the other diode 11p located at the height of 1025 mm are blocked by the loading platform 41, and the above-mentioned infrared rays 19 are not detected by some of the photoreceptors 17. The detection signal is output from the light receiver 6, and as a result, it is possible to prevent an accident that the carrier 41 is caught between the car doors 2 and 2a and between the landing doors 4 and 4a.

Also in the present embodiment having the above-described configuration, a predetermined height area (ie, the car sill 2) is set in accordance with the target such as the bed 41 of the patient stretcher 40 to be detected.
By narrowing the distance between the diodes 11m to 11r at a height of 985 to 1285 mm from b), obstacles such as the bed 41 having a small vertical thickness can be reliably detected, and the lower height region can be detected. The arrangement interval of the diodes 11a to 11m is slightly widened (that is, the height region of 35 to 985 mm from the car threshold 2b), and the diode 11r is set in the upper height region (that is, the height region of 1285 mm or more from the car threshold 2b). By widening the arrangement intervals, it is not necessary to increase the total number of diodes 11a to 11r.

[0021]

According to the present invention, as described above, according to the present invention, the non-contact sensors are arranged at relatively small intervals in a predetermined height region according to the detection target, thereby improving the detection accuracy. Even if the detection target located in the predetermined height area is an obstacle having a small vertical thickness, the non-contact sensor disposed at a relatively small interval can reliably detect the obstacle. There is. Further, in the other height area different from the predetermined height area, by disposing the non-contact sensors at relatively wide intervals, it is not necessary to increase the total number of these non-contact sensors. It also has the effect of ending.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a safety device for an elevator entrance according to an embodiment of the present invention.

FIG. 2 is an explanatory view of an elevator entrance provided with the safety device of the present embodiment.

FIG. 3 is an explanatory view of an elevator entrance provided with a safety device according to another embodiment of the present invention.

FIG. 4 is a view of a conventional car door provided with a safety device for an elevator entrance, as viewed from a landing side.

5 is a cross-sectional view of the car door and the landing door of FIG.

FIG. 6 is a longitudinal sectional view illustrating a conventional safety device for an elevator entrance.

FIG. 7 is a plan view of an elevator entrance.

FIG. 8 is a side view of the car door and the landing door as viewed from a portion A in FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 car 2a car door 3 hall 4a hall door 5 light emitter 6 light receiver 11 diode group 11a to 11z diode 17 light receiver 30 carriage 31 carrier 40 patient stretcher 41 carrier

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Yamamoto, Inventor 1-6-6 Kanda Nishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Co., Ltd. (72) Masahiro Yamada 2-156, Amimachi, Kasugai-shi, Aichi Prefecture Toyo Electric Co., Ltd.

Claims (3)

[Claims] 1. An elevator doorway safety device comprising a plurality of non-contact sensors for detecting obstacles at almost the entire height of the doorway at an elevator doorway having a car door and a landing door, wherein the plurality of non-contact sensors are provided. Are disposed at unequal intervals in the vertical direction. 2. An elevator doorway safety device according to claim 1, wherein an interval between the plurality of non-contact sensors is set to be smaller than an interval between the plurality of non-contact sensors. 3. The safety device according to claim 1, wherein each of the plurality of non-contact sensors comprises a light emitter and a light receiver facing each other.