JPH08143241A - Hydraulic elevator emergency stop device operation test device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an operation test device for a hydraulic elevator emergency stop device that can surely and easily confirm the operation status of the operation test device and the operation of the emergency stop device. [Constitution] Car support member 5 standing upright from the hoistway floor 4
And a car lowering device 6 which is disposed between the car supporting member 5 and the car 1 and moves the car 1 downwardly after the rope is relaxed, in the operation test device of the hydraulic elevator emergency stop device, The load detection device 7 disposed on one of the contact surfaces of the car 1 and the car support member 5 to the device 6
Of the weight detection device 7, 8C, 8D1, which outputs a signal when the weight detected by the load detection device 7 changes suddenly.
8D2, 8E, 8F and the weight detection devices 7, 8C, 8
This is a configuration including display devices 8G1 and 8G3 that are turned on by the output signals of D1, 8D2, 8E, and 8F.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation test device for a hydraulic elevator emergency stop device.

[0002]

2. Description of the Related Art A conventional operation test apparatus for a hydraulic elevator emergency stop device is described in Japanese Utility Model Publication No. 2-37807.
A jack having a plunger that moves forward and backward by hydraulic pressure,
An emergency stop device equipped with this car that can be moved up and down via a rope by this jack and that operates when the rope relaxes, a spring buffer pedestal installed at the bottom of the hoistway, and this spring buffer A guide that is mounted on a guide that is supported by a cradle and a spring that is inserted into the guide when performing an operation test of an emergency stop device in a hydraulic elevator. The emergency stop device includes a centering member having a lower side inserted therein and having centering seats at upper and lower ends thereof, and a hydraulic jack placed on the centering seat of the centering member and imparting a lifting force to the car. When performing the operation test of, the centering member is inserted into the guide of the spring buffer pedestal, and the hydraulic jack is placed on the centering seat of this centering member. Place is by hydraulic jacks there is what is arranged at a position closest to the car.

[0003]

According to the above-mentioned prior art, an operator raises the hydraulic jack plunger in the hoistway to raise the car to loosen the rope once, and then lowers the hydraulic jack plunger to make an emergency stop. Since the device is operated, it is necessary to arrange at least one worker in the hoistway such as lifting and lowering work of the hydraulic jack plunger in the hoistway and work to check the operation of the emergency stop device. Even if an extension switch is installed so that the hydraulic jack can be operated at the lowest floor, it is necessary to confirm whether the hydraulic jack plunger has moved up and down and check the operation of the emergency stop device before going down the hoistway. ,
In addition, since the operation status of these emergency stop device operation test devices and the operation of the emergency stop device are visually confirmed, the emergency stop device is located at a position higher than the line of sight of the bottom of the car in the dimly lit hoistway, and the rail is wedged to grasp the emergency operation. It was difficult to confirm the narrow gap between the stop device and the rail, which required skill and was a laborious task.

It is a main object of the present invention to provide an operation test device for a hydraulic elevator emergency stop device, which can surely and easily confirm the operation status of the operation test device and the operation of the emergency stop device.

Further, in the above-mentioned prior art, since the car is moved by the hydraulic jack, the car is heavy and has a large shape, and the workability when carrying or setting is poor, and the emergency stop device is defective. Otherwise, if the valve was opened at the same time when lowering the car, the hydraulic jack plunger could not support the weight of the car, and the car might drastically descend. At this time, if the operator visually confirms the operation status of the operation test device and the operation of the emergency stop device in the hoistway, there is a safety problem that a personal injury occurs with a very high probability.

Further, in the above-mentioned prior art, the work of mounting the motion test device, the operation of the motion test device for raising and lowering the hydraulic jack plunger, the confirmation of the operation status of the motion test device, the confirmation of the operation of the emergency stop device, etc. It was a safety issue that the operator had to wait in the hoistway when the car was moved by the hydraulic jack plunger. In addition, in order to keep the work vehicle safe, it is necessary for the worker to evacuate to the landing outside the hoistway while the hydraulic jack plunger is moving up and down. There was a problem that I had to go back and forth and it took time to work. In this way, since the reciprocation between the landing and the hoistway is troublesome, there is an unsafe work in which the worker does not retract from the hoistway even when the car is hoisting.

Another object of the present invention is to provide a highly safe operation test device for a hydraulic elevator emergency stop device, in which operations other than mounting and removal of the operation test device can be performed outside the hoistway.

[0008]

In order to achieve the above main object, the present invention provides a jack having a plunger that moves forwards and backwards by hydraulic pressure, and a car that can be moved up and down via a rope by the jack and is equipped to this car. , Which is to be mounted when performing an operation test of an emergency stop device that operates when the rope is relaxed, and is erected from either one of a hoistway floor and a shock absorber installed on the hoistway floor. In an operation test device for a hydraulic elevator emergency stop device, which is provided with a car support member, a car lowering device that is disposed between the car support member and the car, and moves the car downward after the rope has relaxed, The weight of the car is detected by a load detection device disposed on one of the contact surfaces of the car and the car support member to the car lowering device, and the weight detected by the load detection device is detected. A weight detecting device for outputting a signal at Naru sudden change, those having a display device and which is turned by the output signal of the weight detecting device.

[0009]

With this configuration, the operation test of the hydraulic elevator emergency stop device is carried out by installing the support member and the car lowering device on the floor of the hoistway or the shock absorber, then lowering the car once and then lowering the car. When the weight lowering device comes into contact with the lowering device, the weight detecting device outputs a signal, and the signal illuminates the display device so that the car lowering device comes into contact with the lowering device.

Next, the plunger is lowered while the car is in contact with the car lowering device to loosen the rope, and the power supply switching device of the operation panel is turned on to apply a voltage to the heating device arranged in the car lowering device. Then, when the synthetic resin is melted by heating and the car further descends under its own weight and the emergency stop device operates, the weight detection device outputs a signal due to the change in the load at which the weight of the car is no longer applied to the car support member. The display turns on to let you know that the emergency stop has activated.

As described above, since the operation check and operation of the emergency stop device and the operation test device can be performed outside the hoistway, the operation test of the emergency stop device can be easily performed.
The worker's safety can be reliably maintained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an operation test device for a hydraulic elevator emergency stop device according to the present invention will be described below with reference to FIGS.

In the figure, when testing the operation of an emergency stop device 3 provided on a car 1 of a hydraulic elevator and gripping a rail 2 by a wedge action, a predetermined length which is a car support member standing on a hoistway floor 4. The rectangular bar 5 and the car lowering device 6 are arranged on the upper end surface of the rectangular bar 5. A load detection device 7 that outputs a voltage in proportion to the load is disposed on the end surface of the car lowering device 6, and the car lowering device 6 and the load detection device 7 are operated by a control panel 8 via cords 6a and 7a. , And commercial power is supplied from the outlet in the hoistway to the operation panel 8 through the power cord 8a.

Further, the car lowering device 6 includes two metal discs 6
An inner wall 6c and an outer wall 6d of a cylindrical body made of silicon rubber, which is a cylindrical body having a concentric cross section, are adhered between b, and a melting point of 50 to 10 is provided between the inner wall 6c and the outer wall 6d.
It is a synthetic resin under the trade name “free resin” sold by Daicel Craft Co. at 0 ° C., and has a melting point of 70 in this embodiment.
A synthetic resin 6e at a temperature of 0 ° C. is filled, and a plurality of nichrome wires 6f, which are heating devices and are wound at equal intervals, are arranged. Further, the load detection device 7 is arranged on the metal disk 6b.

Further, as shown in FIG. 3, the operation panel 8 is connected to an AC power source AC via a power cord 8a, and this AC power source AC is a switch 8 attached to a case of the operation panel 8.
The car lowering device 6 through the contact 8Aa of A and the cord 6a
Nichrome wire 6f arranged between the inner wall 6c and the outer wall 6d
Is supplied to the DC power supply 8B.

The DC power supply device 8B also outputs a predetermined DC voltage to the DC power supply terminals Vcc and GN. The DC power supply terminals VCC and GN are provided with a load detecting device 7 via a cord 7a, a waveform shaping circuit 8c which outputs a constant voltage when the fluctuating input voltage becomes higher than a predetermined voltage,
When a pulse is input between the input terminals, the one-shot circuits 8D1 and 8D2 which operate at the rising edge of the input pulse and output a pulse having a predetermined pulse width are connected to the respective power supply terminals.

The output terminal of the load detection device 7 is connected to the input terminal of the waveform shaping circuit 8C via the terminal 8Ci, and the output terminal of the waveform shaping circuit 8C is composed of the capacitor 8E1 and the resistor 8E2 via the terminal 8C0. It is connected to the capacitor 8E1 of the differentiating circuit 8E. Also, the capacitor 8E
1 and the DC power supply terminal GN, a resistor 8E2 is connected, and the connection point between the capacitor 8E1 and the resistor 8E2 is connected via the terminal 8E0 to the anode of the diode 8F1 of the rectifier circuit 8F and the diode 8F1.
It is connected to the cathode of F2, and the cathode of the diode 8F3 and the anode of the diode 8F4 are connected to the DC power supply terminal GN. The cathode of the diode 8F1 and one input terminal of the one-shot circuit 8D1 are connected via a terminal 8F01, and the anode of the diode 8F3 is connected to the other input terminal of the one-shot circuit 8D1. Further, the cathode of the diode 84F and one input terminal of the one-shot circuit 8D2 are the terminal 8F02.
And the anode of the diode 8F2 and the other input terminal of the one-shot circuit 8D2 are connected.
Further, between the output terminal of the one-shot circuit 8D1 and the DC power supply terminal GN, the terminal 8D01, the green LED 8G1 attached to the case of the operation panel 8 and the control resistor 8G2 are respectively connected, and the output terminal of the one-shot circuit 8D2. Terminal 8D02, the red LED 8G3 attached to the case of the operation panel 8, and the control resistor 8G between the DC power supply terminal GN and the DC power supply terminal GN.
4 are connected to each other. The display is a green LED
8G1 and red LED 8G3.

Next, an operation test method of the hydraulic elevator emergency stop device will be described using the operation test device configured as described above.

First, the worker A stands on the hoistway 4 at the center of the bottom of the car 1 at the abutting position so as not to fall down, and the load detecting device 7 is attached to the car 1 at the upper end surface of the car 5. The car lowering device 6 in the direction of contacting the bottom of the car, connect the power cord 8a to the outlet in the hoistway, extend the cord 6a, and place the operation panel 8 on the bottom floor FL of the floor.
The worker A moves from the hoistway floor 4 to the lowest floor hall FL,
Close the lowest floor hall door FD.

Next, the worker A instructs the worker B to lower the car 1 from the car 1 at a low speed, and the car 1
As shown in FIG. 2, the car 1 and the car lowering device 6 are lowered.
, The load detection device 7 receives pressure from the car 1, and outputs a voltage proportional to the pressure, that is, the weight, to the terminal 8Ci as shown by the voltage waveform in FIG. From the above, from the waveform shaping circuit 8C to B of FIG.
The waveform-shaped voltage waveform shown in is output to the differentiating circuit 8E via the terminal 8C0. At the rising edge of the voltage waveform shown in FIG. 4B output from the waveform shaping circuit 8C, the differentiating circuit 8E
Outputs the trigger waveform Ca shown in C of FIG. 4 to the terminal 8E0, and the diode 8F1 of the rectifier circuit 8F and the terminal 8F0.
The trigger waveform indicated by D1 in FIG. 4 is output to the one-shot circuit 8D1 via 1. The one-shot circuit 8D1 outputs the pulse indicated by E1 in FIG. 5 to the terminal 8D01 at the rising edge of the input trigger waveform, and outputs 8D1-8D01-8G1.
The -8G2-GN circuit is molded and the green LED 8G1 is lit for a time corresponding to the pulse width.

The worker A can confirm that the car 1 has come into contact with the car lowering device 6 by the lighting of the green LED 8G1, and instructs the worker B to further lower the car 1. When the worker B further lowers the car 1, as shown in FIG. 5, it is wound around a pulley 9A installed on the upper end of the plunger 9, and one end of the base 10 of the cylinder 10 is wound around.
The rope 11 connected to A through the thimble rod 11A and the other end connected to the bottom of the car 1 through the thimble rod 11A becomes loose, and the emergency stop device link mechanism 12 operates to open the emergency stop switch (not shown). The plunger 9 stops descending.

Next, the operator A operates the switch 8 on the operation panel 8.
When A is added, AC-8a-8Aa-6a-6f-6
A circuit of a-8Aa-8a-AC is molded, and the nichrome wire 6f heats the synthetic resin 6e filled in the car lowering device 6. The heated synthetic resin 6e starts melting at 70 ° C. and cannot support the load of the car 1,
As shown in FIGS. 6 and 7, the car lowering device 6 is crushed and the deformation amount car 1 is lowered, so that the emergency stop device 3 operates and grips the car 1 on the rail 2 by the wedge action.

On the other hand, as shown by SW in FIG. 4, when the switch 8A is turned on, the synthetic resin 6e starts melting and the car 1
Since the pressure of 6 deforms the car lowering device 6, the output voltage of the load detecting device 7 gradually decreases as shown in A of FIG.
When the emergency stop device 3 operates, it becomes close to zero, and the output waveform of the waveform shaping circuit 8C becomes zero as shown in FIG. 4B.
The trailing edge of the output waveform of the waveform shaping circuit 8C causes the differentiating circuit 8E to apply the trigger waveform Cb shown in C of FIG.
It outputs to the rectifier circuit 8F via E0, and outputs the trigger waveform shown in D2 of FIG. 5 to the one-shot circuit 8D2 via the diode 8F4 of the rectifier circuit 8F and the terminal 8F02. The one-shot circuit 8D2 outputs the pulse indicated by E2 in FIG. 4 to the terminal 8D02 at the rising edge of the input trigger waveform, and the red LED 8G3 corresponds to the pulse width in the circuit between 8D2-8D02-8G3-8G4-GN. Light.

The worker A is a red LED provided on the operation panel 8.
It can be confirmed in the lowest floor hall FL that the emergency stop device 3 is activated by the lighting of 8G2 and the rail 2 is gripped by the wedge action to prevent the free fall of the car 1.

Next, in order to restore the emergency stop device 3, the worker A short-circuits the opening of the emergency stop switch (not shown), so that the operator A has a predetermined location on the terminal (not shown) of the control panel (not shown) installed in the machine room. Is short-circuited and the operator B is instructed to descend the car 1. It is confirmed that the car 1 is not further lowered and that the green LED 8G1 is not turned on again so that the emergency stop device 3 is reliably operated. Next, the worker A instructs the worker B to raise the car 1. Basket 1
The emergency stop device link mechanism 12, the emergency stop device 3, and the emergency stop switch (not shown) are returned to their original positions as the above.
In addition, the car lowering device 6 which was elastically deformed by the pressure of the car 1
Is completely released from the pressure of the car 1 and returns to the original cylindrical shape.

Next, the worker A removes the short-circuited portion of the terminal (not shown), releases the switch 8A of the operation panel 8, gets down to the hoistway floor 4, removes the car lowering device 6, the square bar 5, etc. The operation test of the hydraulic elevator emergency stop device ends.

According to this embodiment, the green LED 8G1,
Red LED 8G3 is connected to one-shot circuits 8D1 and 8D2
However, the same effect can be obtained by using a memory circuit with a reset button instead of the one-shot circuits 8D1 and 8D2.

Further, in the present embodiment, the inner wall 6C and the outer wall 6d of the car lowering device 6 are cylindrical bodies. However, the same effect can be naturally obtained with a polygonal prism or a circular cylinder as long as it is a columnar body.

In this embodiment, the case where the square bar 5 is erected on the hoistway floor 4 and the operation test of the emergency stop device 3 is performed has been described. The same effect can be obtained by using a metal pipe instead of.

[0030]

According to the present invention, since the operation confirmation and operation of the emergency stop device and the operation test device can be performed outside the hoistway, the operation test of the emergency stop device can be easily performed.
The worker's safety can be reliably maintained.

[Brief description of drawings]

FIG. 1 is a partially broken perspective view of an operation test device for a hydraulic elevator emergency stop device according to an embodiment of the present invention.

FIG. 2 is a lower sectional view of a hoistway using the operation test device for the hydraulic elevator emergency stop device according to the embodiment of the present invention.

FIG. 3 is a block diagram of a main part of an operation panel for operating the operation test apparatus according to the embodiment of the present invention.

4 is a time chart explaining the operation of the main part block diagram shown in FIG. 3. FIG.

5 is a vertical cross-sectional view of the lower part of the hoistway corresponding to FIG. 2 when the emergency stop device link mechanism is operated.

6 is a sectional view of the lower part of the hoistway corresponding to FIG. 2 when the emergency stop device is actuated.

FIG. 7 is a perspective view of essential parts of the operation test device corresponding to FIG. 1 when the emergency stop device is actuated.

[Explanation of symbols]

 1 car 3 rope 6 car lowering device 7 load detection device 8 operation panel 6c inner wall 6d outer wall 6e synthetic resin 6f nichrome wire 8C waveform shaping circuit 8E differentiating circuit 8F rectifying circuit 8D1, 8D2 one-shot circuit 8G1 green LED 8G8 red LED switch

Claims (3)

[Claims] 1. An operation test of a jack having a plunger that moves forward and backward by hydraulic pressure, and a car that can be moved up and down via a rope by the jack, and an emergency stop device that is mounted on this car and that operates when the rope relaxes. A car support member, which is to be mounted when performing the operation, and which is erected from one of the hoistway floor and the shock absorber installed on the hoistway floor, and is disposed between the car support member and the car. In the operation test device of the hydraulic elevator emergency stop device including a car lowering device that lowers and moves the car after the rope has relaxed, in the car lowering device, the contact surface of the car and the car support member A weight detection device which detects the weight of the car by a load detection device arranged on one side and outputs a signal when the weight detected by the load detection device changes rapidly, and the weight detection device. An operation test device for a hydraulic elevator emergency stop device, comprising: a display device that lights up according to an output signal of the device. 2. The car lowering device is provided with a polygonal cylindrical body having a side surface formed of a rubber body, a synthetic resin having a melting point of 50 to 100 ° C. filled in the cylindrical body, and the cylindrical body. The operation test device for the hydraulic elevator emergency stop device according to claim 1, further comprising: 3. An operation panel, which is connected to the car lowering device with a cable of a predetermined length, and is provided with a power supply opening / closing device of the heating device and the display device.
And an operation test device for the hydraulic elevator emergency stop device according to claim 2.