JPH04166576A - Safety device for car carrying elevator - Google Patents

Abstract

PURPOSE:To make it possible to promote operation efficiency of an elevator while securing safety by providing alarming detectors to make detection and operation before stopping detectors makes detection and operation and an alarm equipment giving the alarm through the operation of them. CONSTITUTION:A car A is pulled into a cage 1, and when the car A moves across a specific position, stopping detectors 12 and 13 to stop the operation of an elevator by making detection and operation are provided to the elevator rising, falling and moving to a required floor. Alarming detectors 20 and 21 detecting and operating prior to the stopping detectors 12 and 13 and an alarm equipment 22 giving the alarm through the detection and operation of them are provided. When the car A is moved in the direction of the front and rear by the vibration of the elevator or the wrong operation of an operator, detection is made to give the alarm, and a necessary action is taken by the operator. At that time, the operation of the elevator is continued until the cage 1 passes across a specific position so that the stopping detectors 12 and 13 make detection and operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a safety device for an elevator for transporting a motor vehicle for raising and lowering a motor vehicle.

(Prior Art) A car 1 of an elevator for transporting automobiles in a general multi-level parking lot or the like is shown in FIGS. 6 and 7. This car 1 is composed of a car body 2 and a car frame 3 on which it is mounted and supported. The car main body 2 is of an oven type and is composed of a flat car floor plate 4 which is elongated in the front and back, and side plates 5 and 6 erected on the left and right sides of the car floor plate 4. Further, the car frame 3 is composed of a lower beam 7 that supports the car floor plate 4 from below, left and right support columns 8, and an upper beam 9. The car frame 3 is suspended by lobes (not shown), and the entire car 1 is moved up and down in a hoistway of a building by a lifting drive device such as a hoist. This lifting/lowering operation is controlled by an elevator control device.

Incidentally, at the front and rear ends of the car floor plate 4, a sill 10 is provided in an overhanging state adjacent to a sill (not shown) of the entrance/exit of the building to facilitate boarding and alighting of the automobile A when the car lands on the floor. In addition, a car stopper 11 is provided on the top surface of the car floor 4 near the front and rear ends.
are provided for each.

As a safety device in such an elevator for transporting automobiles, stop detectors 12 and 13 are provided near the front and rear ends of the car body 2 of the car 1. The front and rear stop detectors 12 and 13 are each an optical sensor using a phototube or the like, and the light emitter 12 attached to one side plate 5
a, 13a, and light receivers 12b, 13b attached to the other side plate 6 in opposition to the light receivers 12b, 13a.

Then, as shown in FIG. 7, the elevator is moved up and down with the car A on the car 1, and during the up and down operation, due to vibrations of the elevator, malfunctions in the operation of the car A, etc., the car A is moved in the longitudinal direction. When the vehicle A moves beyond a predetermined position, the light from the light emitter 12a or 13a of the stop detector 12 or 13 is blocked by the front or rear part of the vehicle A, and the light receiver 12b or 13b cannot receive the light, resulting in an abnormality. Emit a detection signal. This signal is sent to the elevator control device (
(not shown), and the elevator operation is immediately stopped. This prevents the car A from coming into contact with the inner wall of the hoistway due to it protruding from the car 1 and causing a fall accident.

(Problem to be Solved by the Invention) By the way, the above-mentioned safety device for the car transport elevator detects when the car A in the car 1 moves and stops the operation of the elevator to ensure safe operation. However, if car A is loaded in the car 1 so that it is offset from the center in the front and rear directions, even if car A moves slightly back and forth due to elevator vibration or driver malfunction, the stop The detector 12 or 13 operates to detect an abnormality and the operation of the elevator is stopped, and if such a situation occurs frequently, the operation efficiency of the elevator will be reduced. Moreover, at this time, the operation of the elevator suddenly stops without informing the driver of the movement of the automobile A, which causes a problem of giving the driver a sense of anxiety.

The present invention has been developed in view of the above circumstances, and its purpose is to prevent the car from reaching a predetermined position in the front and rear directions even if the car moves due to elevator vibrations, driver malfunction, etc. The system continues to operate the elevator and alerts the driver to stop the movement of the car to avoid danger, and only stops the elevator when the car has moved forward or backward beyond a predetermined position to ensure safety. An object of the present invention is to provide a safety device for an elevator for transporting automobiles, which can improve safety and operation efficiency of the elevator.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a stop detection system that detects when a car in an elevator car moves beyond a predetermined position in the longitudinal direction and stops the elevator operation. In the safety device for a car transport elevator equipped with a car transport elevator, an alarm detector is provided which detects when the car in the car moves in the front-back direction before the stop detector, and the alarm detector The reason is that an alarm device is provided which issues an alarm when the detection operation is detected.

(Function) According to the safety device for the car transport elevator configured as described above, when a car gets into the car of the elevator that has landed on the floor and stops, the operation of the elevator is started and the car is moved up and down to the destination floor.

If the car in the car moves forward or backward due to elevator vibration or driver malfunction during this ascent or descent, the alarm detector will first detect it and the alarm system will issue an alarm.
To avoid danger by alerting the driver and stopping further movement of the vehicle. During this time, elevator operation continues without stopping. When the car moves further and exceeds a predetermined position in the longitudinal direction of the car, the stop detector operates to detect and stop the elevator.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. Note that the same reference numerals are given to the same components as those shown in FIG. 6 and FIG. 7 in order to simplify the explanation.

Car body 2 of car transport elevator car 1 as before
Light emitters 12a, 13a and light receivers 12b, 13b are arranged facing each other at predetermined positions near the front and rear ends of the left and right side plates 5, 6, respectively.
A stop detector 12 and 13 are provided. In addition to this, the front and rear stop detectors 12
．． Alarm detectors 20 and 21 that operate to detect the forward and backward movement of the automobile A are provided prior to the alarm detectors 13 and 13. The front and rear alarm detectors 20.21 are the front and rear stop detectors 12.
13 (toward the center of the car) by a predetermined distance L in both the front and rear.
(for example, a size of about 10 an).

The front and rear alarm detectors 20.21 are also optical sensors using phototubes similar to the stop detector 12.13, and have light emitters 20a and 21a attached to one side plate 5, and light emitting devices 20a and 21a attached to the other side plate 6. Light receivers 20b and 21 mounted opposite to each other
It is composed of b. The light beams from the light emitters 20a, 21a are received by the light receivers 20b, 21b, which output a normal detection signal when receiving normal light, and output an abnormality detection signal when no light is received.

Further, an alarm device 22 such as a buzzer is attached to the lower surface of the upper beam 9 of the car frame 3 of the elevator car 1. This warning device 22 is configured to issue a warning based on the detection operation of the warning detectors 20 and 21, and to call the driver's attention.

According to the safety device for the elevator for transporting automobiles having such a configuration, the automobile A is driven by the driver's driving operation and gets into the car body 2 of the elevator car 1 which has stopped at the landing, and the car A can move forward and backward. When the car comes to a stop approximately in the center of the car body 2 according to the instructions of the forward/backward guidance indicator light (not shown) that is linked to the stop detector 12.13 and the alarm detector 20.21, the elevator starts operating and the car stops. 1 up and down to the destination floor. If the car A in the car 1 moves forward or backward due to vibrations of the elevator or malfunction of the driver during this ascent or descent, the light emitting device of the alarm detector 20 or 21 will be activated first by the front or rear part of the car A. 20a or 21
Since the light from g is blocked, the light receiver 20b or 21b cannot receive the light and outputs an abnormality detection signal. This abnormality detection signal causes the alarm device 22 to issue an alarm, which alerts the driver to stop further movement of the automobile A, such as by applying the brakes, thereby avoiding danger. During this time, elevator operation continues without stopping. When the automobile A further moves forward and backward and exceeds a predetermined position in the longitudinal direction of the car 1, the light emitting device 12 of the stop detector 12.13 is activated by the front or rear portion of the automobile A.
The light from a or 13a is blocked, and the light receiver 12b or 13b cannot receive the light and outputs an abnormality detection signal. This signal is sent to the elevator controller (not shown) to immediately stop elevator operation. Now car A car 1
Safety is ensured by preventing contact with the inner wall of the hoistway and the risk of falling accidents caused by protruding from the hoistway.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 to 5. Here again, the same reference numerals are given to the same components as those in the previous embodiment to simplify the explanation.

In this embodiment, an image sensor 30 is used as the alarm detector in place of the alarm detectors 20 and 21 using the phototubes described above. That is, while the stop detectors 12.13 are provided at predetermined positions near the front and rear ends of the left and right side plates 5.6 of the car body 2 of the car transport elevator car 1, as in the conventional case, on the car frame 3 of the car 1, An image sensor 3o is attached to the rear side of the beam 9 as an alarm detector. This image sensor 3o is a one-dimensional scanning image sensor, which detects the position of the object by outputting a high level signal and a low level signal based on the difference in brightness between the position where the object is present and the position where it is not. It is something to do.

The image sensor 30 is set to detect the forward and backward movement of the automobile A within the car body 2 before the stop detectors 12 and 13 at the front and rear ends do. This image sensor 30 repeatedly scans one after another, detects the movement of the car A over time, and sends a detection signal to the microcomputer 31 shown in FIG. 4. If a difference occurs between these detection signals, the car A moves forward or backward. In this case, the microcomputer 31 is configured to issue an alarm command signal to the alarm device 22.

FIG. 4 shows a block diagram of the microcomputer 31. First, the image sensor 30, the alarm device 22, and the elevator operation control device 32 are connected to the microcomputer 31 through signal input/output ports 33, respectively.

This microcomputer 31 basically includes a CPU (central processing unit) 34 that controls the alarm device 22;
A CLOCK 35 that processes programs for the control operation of the CPU 34 in chronological order, and a ROM (read/write) that stores the control operation program data of the CPU 34.
Only memory) 36, RAM (random access memory) 37 and RAM 38 for storing scan data sent from the image sensor 30, and these are connected by a pass line 39. ing.

Incidentally, FIG. 5 shows a flowchart of the control operation of the CPU 34 according to the program stored in the ROM 36.

The operation of the safety device for the automobile transportation elevator constructed as described above will now be explained with reference to the flowchart shown in FIG. Similar to the embodiment described above, when the car A gets into the car body 2 of the elevator car 1 and the elevator starts operating, the CPU 34 operates according to the program in the ROM 36 of the microcomputer 31, and input/output is performed as shown in step 100. It is confirmed whether the elevator control device 32 is outputting a signal indicating that the elevator is in operation via the port 33. If the signal is not output, step 100
to stop processing. If the driving signal is being output, the process moves to step 101, where the scanning result of the image sensor 30 of the car A in the car body 2 is taken in via the input/output port 33 and stored in the RAM 37.

Next, the process proceeds to step 102, in which the scan results of the vehicle by the image sensor 30 are sent to the input/output port 33 in the same manner as described above.
This time, it is stored in the RAM 38.

Next, the process proceeds to step 103, where the contents stored in the RAM 37 and the contents stored in the RAM 38 are compared. If the contents of both match, it means that the car A is not moving, and the process proceeds to step 104. In step 104, it is checked again whether the elevator operation signal is being output. If the operation signal has been output, the process returns to step 102 again, and the scanning result by the image sensor 30 is stored in the RAM 3.
8, move to step 103, and store RAM37 and RA again.
From 102 to 104, the contents of M38 are compared, and if the contents match, the process proceeds to step 104.
Repeat steps.

If the elevator operation signal is not output here, the processing step of the microcomputer 31 ends.

On the other hand, if the contents of the RAM 37 and RAM 38 do not match in step 103, the car A in the car body 2
has moved back and forth due to vibrations, operational errors, etc., so step 103 moves to step 105.

In step 105, as in step 104, it is checked again whether the elevator operation signal is being output. If the operating signal is not output, the processing process of the microcomputer 31 ends. If the driving signal is output, the process moves to step 106, where the microcomputer 31 sends a signal to the alarm device 22 via the input/output port 33, activates the alarm device 22, and warns the driver of the vehicle A of an abnormality. Inform.

Then, the process advances to step 107 and the elevator operation signal is checked again. If the driving signal is being output, the alarm device 22 will continue to sound, and if the driving signal is no longer being output,
Proceeding to step 108, the alarm from the alarm device 22 is stopped. In this way, the processing steps of the microcomputer 31 are completed.

In other words, in the safety device for a car transport elevator with such a configuration, if car A in car 1 moves forward or backward due to elevator vibration or driver malfunction while the elevator is in ascending or descending operation, the alarm detector is activated. The scanning signal from the image sensor 30 causes the microcomputer 3 to
Detector 12.1'3 for stopping the movement of car A using 12.1'3
The alarm device 22 issues an alarm to alert the driver and stop the further movement of the automobile A, thereby avoiding danger and achieving the same effects as in the above-mentioned embodiment. It will be done.

In the two embodiments described above, when the automobile A moves back and forth, the alarm detector 20.21 and the image sensor 30 operate to detect the alarm before the stop detector 12.13 operates to detect the alarm. The device 22 was operated to alert the driver, but if a function to control the elevator operation and make it run at a low speed at the same time as this warning is added, the vibrations caused by the vibrations can be reduced. The effect is that the movement of the automobile A is stopped, or even if it moves, the amount of movement is reduced.

〔Effect of the invention〕

According to the safety device for a car transport elevator of the present invention,
Even if the car moves due to elevator vibrations or driver malfunction, if the movement does not reach the specified position in the front and rear direction of the car, the elevator will continue to operate and the driver will be cautioned and the car will be moved. By stopping the elevator, danger can be avoided, and elevator operation can be stopped only when the car has moved forward or backward beyond a predetermined position, ensuring safety and increasing elevator operation efficiency.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an elevator car for transporting automobiles equipped with a safety device showing one embodiment of the present invention, Fig. 2 is a cross-sectional view of the same elevator car, and Fig. 3 shows another embodiment of the invention. A sectional view of an elevator car for transporting automobiles equipped with a safety device, Fig. 4 is a block diagram of the control for operating the alarm device, Fig. 5 is a flow chart showing the same control operation, and Fig. 6 is a conventional elevator car for transporting automobiles The corner perspective view, FIG. 7, is also a sectional view of the elevator car. 1...Car, A...Car, 12.13...Stop detector, 20.21...Alarm detector, 30...
Image sensor (alarm detector), 22... Alarm device. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 31 Figure 5 and Figure 6

Claims (2)

[Claims] (1) In a safety device for a car transport elevator equipped with a stop detector that detects when a car in the elevator car moves beyond a predetermined position in the longitudinal direction and stops elevator operation, An automobile characterized in that it is provided with an alarm detector that performs a detection operation before the stop detector when the automobile moves in the front-rear direction, and an alarm device that issues an alarm by the detection operation of the alarm detector. Safety equipment for transportation elevators. (2) The safety device for an elevator for transporting automobiles according to item 1, wherein the alarm detector uses an image sensor.