JP2003095554A - Safety device on elevator car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of a worker in charge of maintenance inspection work of an elevator. SOLUTION: This safety device on the elevator car is furnished with a safety belt the worker 11 working on a car 10 wears, a hook 14 fitted on this safety belt 13, a safety fence 12 set on the car of the elevator to connect this hook, a connection detector 21 to detect a connecting state of them and the hook 14 to each other and an alarm generator 17 to generate an alarming signal in accordance with a detection signal from it. Consequently, the alarm is generated to the worker time when the safety belt is not properly installed on the safety fence and a fixing fitting at the time of practicing maintenance inspection work of the elevator device, and accordingly, the worker can perform the maintenance inspection work without any anxiety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator car safety device for ensuring the safety of workers engaged in maintenance and inspection work of elevators.

[0002]

2. Description of the Related Art An elevator is used as an indispensable means for moving passengers or luggage up and down in a high-rise building. To ensure the smooth and safe operation of such an elevator at all times, in addition to performing regular maintenance and inspections, check the operating status of each device even when the cumulative operating time reaches a predetermined time. In addition, a specialized worker checks the wear state of parts and adjusts or replaces them if necessary.

As is well known, an elevator machine room (hereinafter, simply referred to as a machine room) is installed right above a hoistway formed vertically in a building, for example, in the rooftop of the building.

A hoist is installed in the machine room. A car is fixed to one end of the main rope wound around the hoist and a balance weight is fixed to the other end of the main rope. The counterweight is a hoisting machine that moves up and down in opposite directions in a slippery manner.

The objects of maintenance and inspection work of this elevator are not only various equipments in the machine room, but also various equipments installed in the car and the joint with the main rope, and various equipments in the hoistway. Over.

Therefore, in order to perform maintenance / inspection of the connecting portion of the main rope and various equipment in the hoistway, it is necessary for the worker to transfer onto the car, and in some cases,
Maintenance and inspection work is performed while the car is running in the inspection operation mode and is moved up and down at a slow speed.

The floor on which a worker gets on a car during maintenance and inspection work is usually defined as the top floor.
Therefore, the worker goes to the top floor of the building, operates the release key on the landing door, and manually opens the landing door that is normally locked in the closed state, and then Get in and start maintenance and inspection work.

In this case, the worker who has transferred to the cage attaches a safety belt as a lifeline to his body before starting the work, and further attaches the rope to the tip of a rope extending from the safety belt. In the unlikely event that the provided hook is connected by engaging it with a safety fence separately attached and fixed on the car or a support tool such as a ring-shaped fixing bracket fixed to the car frame of the car, etc. We are preparing for a fall accident.

[0009]

The safety management for performing the above-mentioned maintenance / inspection work is rigorously defined in manuals, work standards, etc. For various reasons, such as accidentally forgetting it, there was a risk of working without using the safety belt.

Therefore, the present invention ensures the use of the safety belt by the worker on the elevator car,
It is an object of the present invention to provide an elevator car safety device that allows workers to safely perform maintenance and inspection work.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides an elevator car safety device for ensuring the safety of a worker, who performs work on a car. A safety belt to be worn by the user, a connecting means for connecting the safety belt and a support fixed to the car, and the presence or absence of connection between the safety belt and the support by the connecting means. And a notification control means that operates based on an output signal from the connection detection means.

As described above, the elevator car safety device according to the present invention automatically detects the presence / absence of the connection between the safety belt and the support by the connection detecting means, and controls the notification. In response to this, it is possible to confirm that the safety belt is worn and used, and it is possible to avoid the situation where the safety belt is inadvertently started when the safety belt is not connected to the support equipment on the car side. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an elevator car safety device according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a schematic configuration diagram showing an embodiment of an elevator car safety device according to the present invention.

As shown in FIG. 1, a safety fence 12 for protecting an operator 11 is provided on the car 10.

Therefore, the worker 11 who carries out maintenance / inspection work on the elevator installation securely ties the safety belt 13, for example, in the form of a belt, to the body before moving onto the car 10.

A hook 14 as a connecting means is attached to the tip of the rope 13a connected to the safety belt 13, and the worker 11 puts the hook 14 on the safety fence 12 when getting on the car 10. By engaging and connecting,
Ensure personal safety and start maintenance and inspection work. In addition,
As the engagement connection destination of the hook 14 on the car 10, in addition to the safety fence 12, for example, a ring-shaped fixing metal member 15 fixed to the car 10 may be used as a support tool. Further, in this embodiment described below, the hook 14 which is the connecting means is preliminarily attached to the safety belt 13 side.

As shown in FIG. 1, on the car 10, there is stored a device used for carrying out maintenance / inspection work and a switchboard for centrally managing the power connection to each device. A box 16 is provided.

A control device 20 for controlling the operation of the elevator car safety device according to this embodiment is provided on the car 10 or in the machine room.

The control device 20 includes a connection detector 21 for detecting whether or not the safety belt 13 and the safety fence 12 are connected via the hook 14 through a sensor incorporated in the hook 14. The connection detection signal from the connection detector 21 is introduced, and when the safety belt 13 is not properly connected to the safety fence 12, the worker is controlled by driving an alarm device or the like.
Is provided with the notification control means 22 configured to be able to issue some warning. Notification control means 22
Is composed of a timer circuit 221 and a controller 222.

The control device 20 is also provided with a load change detector 23 for detecting the presence or absence of a load change of the car 10. The detection signal from the load change detector 23 and the detection signal from the connection detector 21 are also provided. At the same time, it is supplied to the timer circuit 221 of the notification control means 22.

Although not shown in detail, the load change detector 23 is connected to a well-known load detector provided between the bottom of the car 10 and the car frame to start maintenance work. , The fact that the worker 11 has boarded on the car 10 is detected from the change in the signal from the load detector and the detection signal is supplied to the timer circuit 221. It operates to count the passage of time after getting on the car 10.

When no signal is supplied from the connection detector 21 within a preset predetermined time length (for example, 30 seconds), the worker 11 uses his / her own safety belt 13 as a support fence. The timer circuit 221 supplies a signal to that effect to the controller 222.

When the controller 222 of the notification control means 22 receives the above signal from the timer circuit 221, the car 1
0, the alarm sound generator 17 installed above is operated to generate an alarm sound, the switchboard in the management box 16 is turned off, and the power output is stopped to disable the use of each device, or The elevator control device 30 installed in a machine room or the like and controlling the operation of the entire elevator is controlled to prohibit the operation of the car 10 in the inspection operation mode.

Therefore, the safety fence 12 (or the fixing metal fitting 15) which is a supporting tool and the hook 14 connected to the safety belt 13 are provided.
As shown in FIG. 2, whether or not and are properly connected is determined by the pressure sensor 14a attached inside the tip of the hook 14.
Detected by. That is, the hook 14 is the safety fence 1.
The pressure sensor 14a is pushed to generate an ON signal when it is engaged with a support tool such as 2 or the fixture 15, and the signal is supplied to the connection detector 21 of the control device 20.

Therefore, some of the operation modes in the elevator car safety device configured as described above are shown in FIG.
Will be described below with reference to. In the following explanation of operation,
To start the maintenance and inspection work of the elevator, the worker 1
The load detector 23 indicates that 1 has boarded the car 10.
Is detected, and the detection signal is supplied to the timer circuit 221 of the notification control means 22, and as described above, the timer circuit 221.
Will be described below assuming that the worker 11 has started counting a predetermined elapsed time (for example, 30 seconds) after getting on the car 10.

In the form shown in FIG. 3A, the worker 11
When the hook 14 connected to the safety belt 13 is locked to a support tool such as the safety fence 12, the pressure sensor 14a detects it and supplies the detection signal to the connection detector 21 of the control device 20.

The connection detector 21 supplies to the timer circuit 221 that the safety belt 13 is connected to the support, based on the signal from the pressure sensor 14a. At this time, the timer circuit 221 has already started counting the predetermined elapsed time (30 seconds) after the worker 11 gets on the car 10 by the signal from the load change detector 23.

Therefore, when the timer circuit 221 receives the signal from the connection detector 21 within the predetermined elapsed time (30 seconds), the worker 11 can smoothly and smoothly connect the safety belt 13 to the support tool. Assuming that the operation is properly performed, the time counting operation is stopped thereafter, and the output is not supplied to the controller 222.

However, the worker 11 is in the car 10
When the signal from the connection detector 21 is not supplied even after a lapse of a predetermined time (30 seconds) from the time when the timer circuit 221 starts counting the passage of time, the output signal to that effect is immediately sent to the controller 222. Since the signal is supplied, the controller 222 having received the signal drives and controls the alarm sound generator 17 installed on the upper portion of the car 10.

Therefore, the worker 11 operates the alarm sound generator 17
From the warning sound from the user, he / she notices that the safety belt 13 is not properly connected to the support tool, and the connection operation is immediately performed for safety, and the maintenance / inspection work can be started.

The warning sound generated from the warning sound generator 17 may be generated by a voice synthesizer in addition to the buzzer and chime.

In the embodiment shown in FIG. 3B, when the signal from the connection detector 21 is not supplied even if a predetermined time (30 seconds) has elapsed after the timer circuit 221 counted the time, the controller A reference numeral 222 indicates a case where, instead of the alarm sound generator 17, the distribution board of the management box 16 is controlled to operate so as to cut off the power supply to the equipment housed in the management box 16.

Therefore, at this time, the worker 11 knows at the start of the maintenance / inspection work that he / she cannot use the facilitated equipment, and can notice that his / her safety belt 13 is not connected to the support. , Can ensure safety.

Further, in the mode shown in FIG. 3C, the timer circuit 221 counts a predetermined time (3
When the signal from the connection detector 21 is not supplied even after 0 second), the controller 222 drives and controls the elevator controller 30, and the elevator controller 30 starts the operation of the car 10 in the check operation mode. It is controlled so that it is prohibited.

Therefore, at this time, the worker 11 does not operate even if he / she tries to move up and down the car 10 when carrying out the maintenance and inspection work of the elevator. Therefore, the worker 11 must not connect the safety belt 13 to the supporting member himself / herself. Can be noticed, and the safety of the worker 11 himself can be promoted.

In the description of the embodiment shown in FIG. 3, the alarm sound generator 17 is operated, the power supply to the equipment installed in the management box 16 is cut off, and the elevator control device 30 is used.
Although it has been described that the prohibition of the operation of the car 10 in the inspection operation mode by the above is performed individually, the controller 222 constituting the notification control means 22 may perform all of these at the same time, Further, some of these may be selected and combined arbitrarily.

Although the pressure sensor 14a is attached to the inside of the hook 14 in the above-described embodiment, the hook 14 serving as a connecting member is properly connected and engaged with the safety fence 12 serving as a support tool or the fixing metal fitting 15 side. You may comprise so that it may detect that it was done.

Further, in the above embodiment, as a sensor for detecting whether or not the safety belt 13 and the supporting member are connected, the pressure sensor 14a detects a pressure change due to the engaging and connecting operation between the hook 14 and the supporting member. Although it is configured to detect, other methods include a sensor for detecting a change in electrical characteristics such as a resistance value, a capacitance value, or magnetism between the two engaged for connection, or a mechanical method. A method of detecting displacement or the like to detect the presence or absence of connection can be adopted.
Alternatively, the safety belt 13 is provided with a signal transmitter,
The signal from the transmitter is transmitted and supplied to the connection detector 21 via the safety hook 12 via the connected hook 14, so that the safety fence 1 which is a support tool in the connection detector 21.
It can also be configured to detect that the 2 and the safety belt 13 are connected.

Furthermore, the hook 14 which is the connecting member,
In general, it has been described that the hook 14 is preliminarily attached to the side of the safety belt 13 and that the hook 14 is connected to the support tool such as the safety fence 12 on the side of the car 10 in the above embodiment. 14 is attached in advance to the support side of the opposite car 10 side, and the rope 1 of the safety belt 13 side is attached.
It may be configured to be coupled and engaged with 3a.

In any case, according to the present embodiment,
By using an alarm or the like, it is possible to make sure that the worker wears the safety equipment more securely, and to start working without forgetting to properly connect the safety belt to the support equipment. It can be avoided in advance.

As described above, according to the present invention, it is possible to achieve further safety for the operator when performing the maintenance / inspection work of the elevator apparatus, which is a great effect in practical use.

[0043]

As described in detail above, according to the present invention, the safety of the worker can be ensured more surely when the maintenance and inspection work of the elevator is carried out, and the worker can take the elevator car. You can start maintenance and inspection work with confidence.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of an elevator car safety device according to the present invention.

FIG. 2 is a plan view showing a connecting means used in the apparatus shown in FIG.

FIG. 3 is a block diagram showing an operation mode of the apparatus shown in FIG.

[Explanation of symbols]

10 car 11 workers 12 Safety fence (supporting tool) 13 safety belt 14 Hook (connecting means) 14a Pressure sensor (connection detection means) 15 Fixing bracket (support) 16 management boxes 17 Alarm sound generator 20 Control device 21 Connection detector (connection detection means) 22 Notification control means 221 timer circuit 222 controller 23 Load change detector 30 Elevator control device

Claims (5)

[Claims] 1. An elevator car safety device for ensuring worker safety, comprising a safety belt worn by an operator working on a car, and a safety belt fixed to the car. Connecting means for connecting to a support tool provided as a connection means, connection detecting means for detecting and outputting the presence or absence of connection between the safety belt and the support tool by the connecting means, and output from the connection detecting means An elevator car safety device comprising: a notification control unit that operates based on a signal. 2. A load change detection means for detecting whether or not there is a change in the load of the car, wherein the notification control means is provided during a predetermined time after the presence or absence of a change in the load of the car is detected. The elevator car safety device according to claim 1, wherein an alarm is issued when a detection signal indicating that the connection is present is not obtained from the connection detection means. 3. The elevator car safety system according to claim 1 or 2, wherein the notification control means is configured to be capable of cutting off power supply to devices installed on the car. apparatus. 4. The elevator car safety device according to claim 1, wherein the notification control means is configured to prohibit operation of the elevator in a check operation mode. 5. The connection detecting means is configured to detect whether or not the safety belt and the support are connected via the connecting means by any one of electrical, magnetic or mechanical means. The car safety device for an elevator according to any one of claims 1 to 4, wherein the safety device is on an elevator car.