JP2009220941A - Elevator landing detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator landing detection device capable of reliably detecting that a car has landed at a landing hall even with attachment of foreign matter or entry of any creature such as an insect. <P>SOLUTION: An elevator landing detection device uses a reflection-type photoelectric sensor 24 and an isolation-type photoelectric sensor 25 in combination. In this structure, even if some error has occurred in any one of these photoelectric sensors, the landing detection device can reliably detect that the car has landed at the landing hall, thereby greatly improving the reliability of the landing detection device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for detecting that an elevator car has landed in a hall, and more particularly, that a car has landed in a hall even if foreign matter is attached or an organism such as an insect invades. It is related with the technique improved so that it can detect reliably.

Conventionally, an elevator is provided with a landing detection device for detecting that a car has landed in a hall.
In this landing detection device, for example, as described in Patent Document 1 below, a reflection type photoelectric sensor that performs light projection and light reception is provided on a door sill of a car and a reflection member is provided on a door sill of a hall. ing.
As a result, when the car lands in the hall, the light beam projected from the light projecting portion of the reflective photoelectric sensor provided on the car side is reflected by the reflecting member on the hall side, and again the reflective photoelectric sensor. It is possible to detect that the car has landed in the hall.

JP 2004-224529 A

  However, since the conventional landing detection device described above has a structure that uses only a reflection type photoelectric sensor, for example, when a foreign substance adheres to a light projecting part or a light receiving part of the reflection type photoelectric sensor or an organism such as an insect enters. There is a risk that it will not be possible to detect that the car has landed in the hall.

  Accordingly, an object of the present invention is to solve the above-described problems of the prior art and reliably detect that a car has landed in a landing hall even if foreign matter is attached or an organism such as an insect enters. Another object is to provide an elevator landing detection device.

The means described in claim 1 for solving the above problem is as follows.
A device for detecting that an elevator car has landed in a hall,
A first light projecting unit that projects a light beam toward a predetermined direction; and a first light receiving unit that receives the light when the light beam is reflected by a reflector and returns. A reflective photoelectric sensor that detects landing when returning to the first light receiving unit;
A cut-off type photoelectric sensor that has a second light projecting unit that projects light toward the second light receiving unit, and detects landing when the light projected from the second light projecting unit is blocked. A sensor,
It is characterized by providing.

That is, the elevator landing detection apparatus according to the first aspect uses a combination of a reflective photoelectric sensor and a blocking photoelectric sensor.
Thereby, even if any one of the photoelectric sensors is abnormal, it can be reliably detected that the car has landed in the hall, so that the reliability of the landing detection device can be greatly improved. .

  According to a second aspect of the present invention, the elevator landing detection apparatus according to the first aspect further includes a support unit that integrally supports the reflective photoelectric sensor and the blocking photoelectric sensor on the car. It is characterized by that.

  That is, the elevator landing detection device according to claim 2 has a structure in which the reflection type photoelectric sensor and the blocking type photoelectric sensor are supported by one support means and attached to the car. It can be easily and accurately mounted on the car.

  According to a third aspect of the present invention, in the elevator landing detection apparatus according to the second aspect, the light beam projected from the first light projecting unit is reflected toward the first light receiving unit. A first cover provided on the side of the hall that has both a reflection section and a blocking section that blocks a light beam projected from the second light projecting section from reaching the second light receiving section. A detector is further provided.

  That is, the elevator landing detection apparatus according to claim 3 is provided with the reflecting portion and the blocking portion integrally as the first detected body. Therefore, the first detected body is highly accurate and easy. Can be attached to the hall.

The means described in claim 4 is the elevator landing detection device according to claim 1,
A second object to be detected having a reflecting portion that reflects the light beam projected from the first light projecting portion toward the first light receiving portion;
A third object to be detected having a blocking unit that blocks the light projected from the second light projecting unit from reaching the second light receiving unit;
The reflective photoelectric sensor and the blocking photoelectric sensor are provided in different parts of the car, respectively.
The second object to be detected and the third object to be detected are provided at positions opposite to the reflective photoelectric sensor and the blocking photoelectric sensor in an elevator hoistway, respectively. .

  That is, the elevator landing detection apparatus according to claim 4 is configured such that the reflective photoelectric sensor and the second detected object are opposed to the interrupted photoelectric sensor and the third detected object, respectively, and the car side Since it is provided at different positions on the hall side (the hoistway side), it can be mounted on elevator devices that cannot secure sufficient space around the door sill of the car or the door sill of the hall. .

  According to the present invention, it is possible to provide an elevator landing detection device that can reliably detect that a car has landed in a landing hall even if foreign matter is attached or an organism such as an insect invades.

  Hereinafter, with reference to FIGS. 1-5, each embodiment of the landing detection apparatus of the elevator which concerns on this invention is described in detail. In the following description, the same parts are denoted by the same reference numerals, and redundant description is omitted.

First Embodiment First, with reference to FIGS. 1 to 4, a landing detection apparatus according to a first embodiment and a modification thereof will be described.

As shown in FIG. 1, the elevator car 10 of the elevator 100 including the landing detection device 20 according to the first embodiment is guided by a pair of left and right car side guide rails 11L and 11R, and moves up and down in the hoistway. A pair of left and right doors 12L and 12R are provided on the front surface.
Further, a driving device 15 that rotationally drives the traction sheave 14 is supported on the tops of a pair of front and rear weight side guide rails 13f and 13r that guide the lifting and lowering of the counterweight (not shown).
Further, one side of the main rope 16 wound around the traction sheave 14 is wound around a pair of left and right car-side sheaves 17L and 17R provided at the upper part of the car 10, so that the car 10 is 2: 1. Suspended by roping.

A pair of left and right doors 12L and 12R of the car 10 slides on the car side door sill 18 and a hold door (not shown) on the hall side is R on the hall side door sill 19 shown in FIGS. Slide.
In the landing detection device 20 of the first embodiment, the reflection type photoelectric sensor 24 and the blocking type photoelectric sensor 25 are supported by the support means 21 at the end of the car side door sill 18.
Moreover, the 1st to-be-detected body 30 is attached to the edge part of the hall | door side door sill 19, as shown in FIG.

As shown in FIG. 2 in an enlarged manner, the support means 21 is a member formed by bending a steel plate into an L shape, and is attached to the car side door sill 18 and is opposed to the landing hall side. And a second portion 21b facing the side of the car.
A total of three reflective photoelectric sensors 24 are arranged in parallel in the vertical direction at a predetermined interval on the surface of the second portion 21b.
Furthermore, one interrupted photoelectric sensor 25 is attached to a tongue piece portion 21c extending from the rear edge of the second portion 21b to the back side of the car 10.

  On the other hand, as shown in FIG. 3, the first detected object 30 supported by the hall side door sill 19 is a member formed by bending a steel plate, and is attached to the hall side door sill 19 to be a car. 10, a reflection part 32 extending in parallel with a predetermined interval with respect to the above-described reflection type photoelectric sensor 24, and a blocking part 33 entering the inside of the above-described blocking type photoelectric sensor 25. is doing.

Thereby, when the car 10 reaches the landing hall, the light beam projected from the light projecting portion of the reflective photoelectric sensor 24 is reflected on the inner wall surface of the reflective portion of the first object 30 to be detected. Returning to the light receiving part of the reflective photoelectric sensor 24.
At the same time, since the blocking part 33 of the first detected body 30 enters inside the blocking photoelectric sensor 25, the light projected from the light projecting part of the blocking photoelectric sensor 25 toward the light receiving part is blocked. The

That is, the elevator landing detection device 20 of the first embodiment uses the reflective photoelectric sensor 23 and the blocking photoelectric sensor 25 in combination.
Thereby, even if any one of the photoelectric sensors is abnormal, it can be reliably detected that the car 10 has landed in the hall, so that the reliability can be greatly improved.
In addition, since the reflection type photoelectric sensor 23 and the blocking type photoelectric sensor 25 are supported by one support means 21 and attached to the car 10, the both photoelectric sensors are easily attached to the car 10 with high accuracy. be able to.
Further, since the reflecting portion 32 and the blocking portion 33 are integrally provided as the first detected body 30, the first detected body 30 is easily attached to the hall side door sill 19 with high accuracy. Can do.

The first detected body 30 shown in FIG. 3 is formed integrally from a steel plate, but, like the first detected body 35 shown in FIG. 37 can be formed in combination.
In this case, the reflection part 36 a can be formed on one member, and the blocking part 37 a of the other member 37 can be formed.

Second Embodiment First, referring to FIG. 5, a landing detection apparatus according to a second embodiment will be described.

The landing detection device 20 of the first embodiment described above has a structure in which the reflection type photoelectric sensor 24 and the blocking type photoelectric sensor 25 are integrally supported by the support means 21.
On the other hand, the landing detection device 40 of the second embodiment supports the reflective photoelectric sensor 24 by the second support means 41 attached to the car-side door sill 18, and the rear lower surface of the rear portion of the car 10. The blocking photoelectric sensor 25 is supported by the third support means 42 attached to the.

Accordingly, a second object to be detected (not shown) having a reflection part that reflects the light projected from the light projecting part of the reflective photoelectric sensor 24 is provided at the end of the hall side door sill 19. It is attached. In addition, the right car-side guide rail 11R that guides the raising and lowering of the car 10 has a third detected object for blocking the light projected from the light projecting unit to the light receiving unit of the blocking photoelectric sensor 25. A body (not shown) is attached.
Note that the second detection target and the third detection target can be configured in the same manner as the portions 36 and 37 that constitute the first detection target 35 shown in FIG.

  That is, the elevator landing detection device 40 of the second embodiment is configured such that the reflective photoelectric sensor 24 and the second detected object are opposed to the blocking photoelectric sensor 25 and the third detected object, respectively. Since it is provided at different positions on the car side and the hall side (the hoistway side), an elevator device that cannot secure a sufficient space around the door sill 18 of the car 10 or the door sill 19 on the hall side. Can also be attached to.

As mentioned above, although each embodiment of the elevator landing detection apparatus according to the present invention has been described in detail, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications are possible.
For example, in the above-described embodiment, the landing detection device is provided on the right end of the car side door sill 18 on the right side of the figure or the lower surface on the right side of the car 10, but other parts, for example, the car side It can also be provided on the left end of the door sill 18 in the figure or on the upper surface of the car 10.

The perspective view of an elevator provided with the landing detection apparatus of 1st Embodiment. The perspective view which expands and shows the waist | hip | lumbar part of the landing detection apparatus shown in FIG. The perspective view which shows the to-be-detected body of the landing detection apparatus shown in FIG. The perspective view which shows the modification of the to-be-detected body shown in FIG. The perspective view of an elevator provided with the landing detection apparatus of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Car 11 Car side guide rail 12 Car door 13 Weight side guide rail 14 Traction sheave 15 Drive device 16 Rope 17 Car side sheave 18 Car side door sill 19 Hall side door sill 20 Support of landing detection device 21 of first embodiment 21 Means 24 Reflection type photoelectric sensor 25 Blocking type photoelectric sensor 30 First detected object 31 Mounting portion 32 Reflecting portion 33 Blocking portion 35 Modification of first detected body 36a Reflecting portion 37a Blocking portion 41 Second support means 42 3rd support means 100 An elevator provided with the landing detection apparatus of this invention

Claims (4)

A device for detecting that an elevator car has landed in a hall,
A first light projecting unit that projects a light beam toward a predetermined direction; and a first light receiving unit that receives the light when the light beam is reflected by a reflector and returns. A reflective photoelectric sensor that detects landing when returning to the first light receiving unit;
A cut-off type photoelectric sensor that has a second light projecting unit that projects light toward the second light receiving unit, and detects landing when the light projected from the second light projecting unit is blocked. A sensor,
An elevator landing detection apparatus comprising:   The elevator landing detection apparatus according to claim 1, further comprising support means for integrally supporting the reflective photoelectric sensor and the blocking photoelectric sensor with respect to the car.   A reflection unit configured to reflect the light beam projected from the first light projecting unit toward the first light receiving unit; and the light beam projected from the second light projecting unit to the second light receiving unit. The elevator landing detection apparatus according to claim 2, further comprising a first object to be detected provided on a side of the hall that has a blocking unit that blocks the terminal so as not to reach. A second object to be detected having a reflecting portion that reflects the light beam projected from the first light projecting portion toward the first light receiving portion;
A third object to be detected having a blocking unit that blocks the light projected from the second light projecting unit from reaching the second light receiving unit;
The reflective photoelectric sensor and the blocking photoelectric sensor are provided in different parts of the car, respectively.
The second object to be detected and the third object to be detected are provided at positions opposite to the reflective photoelectric sensor and the blocking photoelectric sensor in an elevator hoistway, respectively. The elevator landing detection apparatus according to claim 3.

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