JP2001226060A - Safety device for entrance of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for entrance of an elevator allowing easy addition of functions and sure detection of a detected body on a landing side. SOLUTION: This safety device for entrance of an elevator comprises a first detecting means 50 disposed at the entrance of a car 19, having a first light emitting element 5 and a first light receiving element 6, and outputting a first detection signal, and a second detecting means 16 detecting a detected body 12 on the landing 23 side and outputting a second detection signal to the upper side of the entrance of the car 19. Based on the first and second detection signals, a control means 13 controls car doors 1 and 2 and landing doors 20 and 21, thereby realizing the fine opening and closing control of the elevator doors at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator doorway, and more particularly to a safety device for an elevator doorway which detects a passenger trying to get into a car and controls a car door and a landing door.

[0002]

2. Description of the Related Art FIG. 4 is a plan view showing a conventional safety device for an entrance of an elevator.

FIG. 4 shows a conventional safety device for an entrance and exit of an elevator.
As shown in FIG. 1, a first light emitting portion, which is provided on a light emitting body 3 provided near the tip of one car door 1 and emits a first beam 7, that is, a first light emitting element 5, and the other car door 2 Provided on the photoreceptor 4 provided near the tip of
A first beam receiving unit that receives the first beam 7, that is, a first detecting unit 50 including the first light receiving element 6, and a second detecting unit 50 that is provided in the light emitting body 3 and emits the second beam 10 obliquely toward the landing side. A second light-emitting element 8; and a second detecting means 51 provided in the light receiving device 4 and including a second light receiving element 9 for receiving the reflected light 11 of the second beam 10 reflected by the detection object 12 on the landing side. I have.

In the conventional safety device configured as described above, the first detecting means 50 detects an object to be detected between the car doors 1 and 2 and outputs a first detection signal to control means (not shown). The second detection means 51 detects the detection object 12 on the landing side and outputs a second detection signal to control means (not shown), and the control means performs a car operation based on the first detection signal and the second detection signal. The doors 1 and 2 and the landing doors 20 and 21 are controlled.

[0005] In the conventional elevator safety device configured as described above, by detecting the detected object between the car doors 1 and 2 and the detected object 12 on the landing side, the fine and safe car door 1, 2 and the landing doors 20 and 21 can be controlled.

FIG. 5 is a plan view showing another conventional safety device for an elevator entrance. In FIG. 5, the same components as those shown in FIG. 4 described above are denoted by the same reference numerals.

[0007] As shown in FIG. 5, another conventional safety device for an elevator entrance is provided on a light emitting body 30 provided near the tip of one of the car doors 1 and emits a first beam 7. 5 and a first detecting means 50 provided on a photoreceptor 40 provided near the tip of the other car door 2 and comprising a first light receiving element 6 for receiving the first beam 7, and between the car doors 1 and 2. Actuators 14 and 15 that output a third detection signal when they come into contact with the detected object are provided.

Another conventional safety device configured as described above detects an object to be detected between the car doors 1 and 2 by the first detection means 50 and outputs a first detection signal to control means (not shown). At the same time, the objects to be detected between the car doors 1 and 2 are detected by the operating bodies 14 and 15, and a third detection signal is output to control means (not shown), and the control means outputs the first detection signal and the third detection signal. The car doors 1 and 2 and the landing doors 20 and 21 are controlled based on the signal. The safety device described later cannot detect the detection target 12 located on the landing side as in the safety device of FIG. 4 described above and cannot reflect the detected object 12 on the control of the car doors 1 and 2 and the landing doors 20 and 21.

[0009]

By the way, in the above-described safety device at the entrance of the elevator, the light emitting body 3 is provided with the first light emitting element 5 and the second light emitting element 8 provided obliquely, and the light receiving body 4 is provided with the first light emitting element 5. Since the light receiving element 6 and the second light receiving element 9 provided diagonally are provided, the structures of the light emitting body 3 and the light receiving body 4 are complicated and have relatively large thickness dimensions. Therefore, for example, as shown in FIG. 5, when an attempt is made to add a second detection means 51 to an elevator in which operating bodies 14 and 15 are attached to the tips of the car doors 1 and 2 in order to detect passengers on the landing side, When the gap between the car doors 1 and 2 and the working bodies 14 and 15 is small, a new light emitting body 3 and a new light receiving body 4 cannot be attached, so that the working bodies 14 and 15 must be replaced.

Further, the second light emitting element 8 is provided obliquely toward the landing side, and due to the characteristic of detecting the reflected light 11, when the opening interval between the car doors 1 and 2 is widened, even the passers-by passing through the landing. The detection range is limited when the distance between the doors of the car doors 1 and 2 is narrowed as well as when the detection is performed. Therefore, the operation of the second detection means 51 is performed when the distance between the doors is within a predetermined value range. There was a problem that the object to be detected near both ends of the width could not be detected.

It is an object of the present invention to provide an elevator entrance / exit safety device which can easily add a function and can surely detect an object to be detected on a landing side.

[0012]

In order to achieve this object, the present invention provides a first beam emitting portion disposed at a car entrance and emitting at least one first beam in a direction crossing the car entrance. Elevator entrance / exit including first detection means having a first beam light receiving unit for receiving a first beam, and control means for controlling a car door and a landing door based on a first detection signal output from the first detection means. In the safety device of (1), second detection means for detecting an object to be detected on the landing side and outputting a second detection signal is provided above the car entrance, and the control means includes the first detection signal and the second detection signal. The car door and the landing door are controlled based on a signal.

According to the present invention configured as described above, the first
The detection means detects an object to be detected between the car doors and outputs a first detection signal to the control means, and the second detection means at the upper part of the car entrance detects the object to be detected on the landing side and sends the second detection signal to the control means. Outputs a detection signal. The control means controls the car door and the landing door based on the first detection signal and the second detection signal. As described above, since the detection object on the landing side is detected by the second detection means provided above the car entrance, it is not necessary to integrally provide the first detection means and the second detection means as in the related art. Therefore, it is possible to easily add a new function, that is, a second detection unit that detects the detection object on the landing side while utilizing the existing device. Further, since the second detection means is arranged above the car entrance, the detection range of the detection target on the landing side can be made ideal, and therefore, the detection target can be reliably detected.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a safety device for an entrance of an elevator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a car showing an embodiment of an elevator doorway safety device according to the present invention, and FIG.
FIG. 3 is a flowchart showing a processing procedure of the safety device of FIG. 1. In FIGS. 1 and 2, the same components as those shown in FIGS. 3 and 4 are denoted by the same reference numerals. That is, 1 and 2 are car doors, 5 is a first light emitting element composed of, for example, a plurality of infrared light emitting diodes LED, 6 is a first light receiving element composed of, for example, a plurality of phototransistors, 7 is a first beam, and 12 is an object to be detected. , 14,
Reference numeral 15 denotes an operating body, 30 denotes a light emitting body, 40 denotes a light receiving body, and 50 denotes a first detecting means.

As shown in FIGS. 1 and 2, the safety device for the entrance and exit of the elevator according to this embodiment detects the object 12 on the landing 23 side above the entrance of the car 19 and outputs a second detection signal. A detection unit 16 and a control unit 13 that controls the car doors 1 and 2 and the landing doors 20 and 21 based on the first detection signal output from the first detection unit 50 and the second detection signal are provided. Further, the second detecting means 16
Includes, for example, a second detection element 17 that detects heat of the detection target 12 by infrared rays, and a shield 18 that specifies a detection range to the landing 23 side, and detects the detection target 12 within the detection range 22. It is possible. As the second detecting means 16, for example, a means for detecting by ultrasonic waves, a means for irradiating infrared rays and detecting by reflected light thereof, and the like can be used.

Further, the first detecting means 50 detects that the opening interval between the car doors 1 and 2 and the landing doors 20 and 21 has reached a predetermined value based on the amount of light received by the first light receiving element 6, and outputs a door opening signal. Is output to the control means 13, and the control means 13 outputs an operation signal to the second detection means 16 in accordance with the detection signal. The control means 13
Measures the time from the detection of the detection target 12 by the second detection means 16, outputs an inoperative signal to the second detection means 16 in response to the lapse of a predetermined time, and terminates the detection of the detection target 12 It is made to let.

In this embodiment, as shown in FIG. 5, the car doors 1, 2 and the landing door 20,
When the opening 21 starts to open, the control means 13 first outputs an operation signal to the first detection means 50, and the first detection means 50 is operated in step S2. Accordingly, the first step is performed as a procedure S3.
The light emitting element 5 emits light and irradiates the first beam 7,
The beam 7 is received by the first light receiving element 6. At this time, as the procedure S4, for example, the landing doors 20 and 21 are
a, 21a, the opening interval is small, and if the light receiving amount of the first beam 7 by the first light receiving element 6 is equal to or more than a predetermined value, the opening interval between the car doors 1, 2 and the landing doors 20, 21 is set to the predetermined value. Judge that it has not reached. On the other hand, when the car doors 1 and 2 and the landing doors 20 and 21 are further opened, and the received light amount of the first beam 7 reaches a set value or less, the first detection means 50 sets the car doors 1 and 2 and the landing door. 20,
It judges that the opening interval of 21 has become the interval at which the passenger can get on and off, and outputs a door opening signal to the control means 13. In response to this, the control means 13 outputs an operation signal to the second detection means 16, and the second detection means 16 is operated in step S5. Thereby, for example, the car doors 1 and 2 and the landing doors 20 and 21
When the passenger who is the detection target 12 tries to get into the car 19 from the landing 23 side during the door closing operation, the second detection device 16
At the time when the detection target 12 is at the landing 23 position, and outputs a second detection signal.
To prevent the car doors 1 and 2 and the landing doors 20 and 21 from hitting the passenger.

On the other hand, when the second detection device 16 detects the passenger, which is the detection object 12 stopped at the landing 23 in step S6, the control means 13 determines the time from the detection of the detection object 12 by the second detection means 16. measure. At this time, the procedure S
When it is determined that the predetermined time has elapsed from the start of detection as 7, the control means 13 outputs an inoperative signal to the second detection means 16, and in response to this, the second detection means ends detection of the detection target 12 and The control means 13 performs the closing operation of the car doors 1 and 2 and the landing doors 20 and 21.

The operation of the first detecting device 50 is the same as the conventional one. When the first beam 7 is cut off over the entire width of the entrance and exit, a detection signal is output to the control means 13 and the control is performed accordingly. The means 13 controls opening and closing operations of the car doors 1 and 2 and the landing doors 20 and 21.

In the embodiment configured as described above, the detection object 12 on the landing 23 side is detected by the second detection means 16 provided above the entrance of the car 19, so that the first detection means and the It is not necessary to integrally provide the second detection means, and therefore, a new function, that is, a second function of detecting the object to be detected on the landing 23 side while utilizing the existing device.
Detection means 16 can be easily added. Further, since the second detection means 16 is arranged above the car entrance, the detection range of the detection target 12 on the landing 23 side can be made ideal, and therefore, the detection target 12 is reliably detected. be able to. Further, the control means 13 includes a landing 23
When it is detected that the detection target 12 is stopped at a predetermined time, when it is determined that a predetermined time has elapsed from the start of the detection, an inactive signal is output to the second detection means 16 and the detection of the detection target 12 is terminated. It is possible to prevent a necessary extension of the door opening and suppress a decrease in the operating efficiency of the elevator.

[0022]

Since the present invention is constructed as described above, a new function, that is, a second function for detecting an object to be detected on the landing side while utilizing an existing device, for example, the first detecting means or the operating element, is used.
Detection means can easily be added,
More precise control of opening and closing the elevator door can be realized at low cost.

Further, the object to be detected on the landing side can be reliably detected, whereby the passengers trying to get into the car from the landing can be more reliably prevented from being caught by the door during the closing operation. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a safety device for an elevator doorway of the present invention.

FIG. 2 is a plan view taken along line AA of FIG.

FIG. 3 is a flowchart showing a processing procedure of the safety device of FIG. 1;

FIG. 4 is a plan view showing a conventional safety device for an entrance of an elevator.

FIG. 5 is a plan view showing another conventional safety device for an elevator entrance.

[Explanation of symbols]

 1, 2 car door 5 first light emitting element 6 first light receiving element 7 first beam 12 object 13 control means 14, 15 operating body 16 second detecting means 17 second detecting element 18 shielding body 19 car 20, 21 Landing door 22 detection range 30 light emitter 40 light receiver 50 first detection means

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Riki Komatsu 232 Horiguchi, Hitachinaka-city, Ibaraki Pref.

Claims (5)

[Claims] A first beam emitting unit disposed at a car doorway for emitting at least one first beam in a direction crossing the car doorway; and a first beam receiving unit for receiving the first beam.
An elevator doorway safety device comprising: a first detection unit having a beam receiving unit; and a control unit that controls a car door and a landing door based on a first detection signal output from the first detection unit. A second detection means for detecting an object to be detected on the landing side and outputting a second detection signal at an upper portion of the car door, wherein the control means is configured to control the car door and the A safety device for an elevator entrance, which controls a landing door. 2. The control means according to claim 1, wherein said second opening is performed when an opening interval between said car door and said landing door reaches a predetermined value.
2. A safety device for an elevator doorway according to claim 1, wherein an operation signal is outputted to a detecting means to detect the object to be detected. 3. The first detecting means detects that the opening interval between the car door and the landing door has reached a predetermined value, outputs a door opening signal to the control means, and the control means outputs the door opening signal to the control means. The safety device according to claim 1, wherein an operation signal is output to the second detection means in response to the door signal to detect the object to be detected. 4. The control means measures time from the detection of the detected object by the second detection means, and outputs an inoperative signal to the second detection means in response to elapse of a predetermined time. 4. The safety device according to claim 2, wherein the detection of the detected object is terminated. 5. The safety device according to claim 1, wherein the second detection means includes a shield that specifies a detection range on the landing side.