JP2011241018A - Elevator apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator apparatus with a compact and lightweight emergency stop device capable of operating at a high speed, as the mechanism which operates to carry out emergency stop in response to overspeed detecting signal when an elevating speed of an elevator passenger car becomes an overspeed state.SOLUTION: The elevator apparatus includes the emergency stop device 11 which operates to carry out emergency stop of the elevator passenger car 1 at the elevator passenger car 1. An overspeed detecting unit 20 outputs the overspeed detecting signal when an elevating speed of the elevator passenger car 1 exceeds a predetermined speed. A driving unit 8 which acts in a predetermined direction according to a change of gas pressure and makes the emergency stop device 11 operate is arranged to the emergency stop device 11. A valve 19 is arranged between the driving unit 8 and a pressure source 17. When the overspeed detecting signal is input, the valve operates to open itself to make the pressure source 17 communicate with the driving unit 8 thereby making the driver unit 8 act in the predetermined direction according to a predetermined pressure state of the pressure source 17.

Description

  Embodiments of the present invention relate to an elevator apparatus having an improved operating portion of an emergency stop device.

  In a conventional general elevator apparatus, the passenger car is suspended in the shape of a counterweight and a fishing bottle via a hoisting machine by a wire rope, and moves up and down along a guide rail installed inside the hoistway. is there. The raising / lowering speed of the car is transmitted to the speed governor via a speed governor rope different from the wire rope for suspension support. When the car descends beyond a certain speed, the governor operates to grab the governor rope, and is provided between the car and the guide rail via the link provided on the car. The wedge of the emergency stop device is operated to safely decelerate and stop the car (for example, see Patent Document 1).

JP 7-76471 A

  However, when assuming a multi-car elevator or the like in which a plurality of cars are arranged in one hoistway, it is difficult to provide a speed governor and a governor rope for each car and arrange them in one hoistway. . When the governor and the governor rope are not provided, a mechanism for providing an overspeed detection device for the car itself or the outside and operating the emergency stop device using the signal is required. As the mechanism for operating the emergency stop device in response to the overspeed detection signal, the use of an electric operation mechanism is considered. However, assuming the case where the emergency stop device is driven using an actuator or the like, there is a concern that the operating device may be increased in size, weight, operation delay, etc. in obtaining the required operating force.

  For this reason, there is a demand for a small, lightweight and high-speed device that operates an emergency stop mechanism in response to an overspeed detection signal.

  The elevator apparatus according to the present invention is an elevator apparatus provided with an emergency stop device for emergency stop of raising / lowering of a car, and outputs an overspeed detection signal when the raising / lowering speed of the car exceeds a predetermined speed. An overspeed detection device, a drive device that operates in a predetermined direction by a change in gas pressure, and operates the emergency stop device to stop the raising and lowering of the car, and is provided between the drive device and a pressure source, And a valve that causes the pressure source and the drive device to communicate with each other when the overspeed detection signal is input and operates the drive device in the predetermined direction according to a predetermined pressure state of the pressure source. .

It is a whole lineblock diagram concerning the 1st and 3rd embodiment of the elevator apparatus of the present invention. It is a principal part enlarged view of 1st Embodiment same as the above. It is a figure which shows the modification of 1st Embodiment same as the above. It is a principal part enlarged view of 2nd Embodiment of the elevator apparatus of this invention. It is a principal part enlarged view of 4th Embodiment of the elevator apparatus of this invention. It is a principal part enlarged view of 5th Embodiment of the elevator apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 shows an elevator apparatus according to a first embodiment of the present invention. In FIG. 1, the elevator apparatus suspends a car 1 and a counterweight 2 in a hoistway 5 in the shape of a fishing bottle via a hoisting machine 4 by a wire rope 3. The car 1 is configured to move up and down along a guide rail 6 installed inside the hoistway 5, and is lifted and lowered with the counterweight 2 by the wire rope 3 by the rotating operation of the hoisting machine 4. Operates and moves to the destination floor. The hoisting machine 4 is provided on the upper part of the hoistway 5 together with the control panel 7. The control panel 7 controls the operation of the entire elevator apparatus including the hoisting machine 4.

  The car 1 is provided with emergency stop devices 11 between the guide rails 6. Each of the emergency stop devices 11 has links 9 connected to each other by rods 10, and by rotating these links 9, a wedge 12 provided between the guide rails 6 is operated to move the car 1. Safely decelerates and stops. A link switch 13 is provided near the link 9. The link switch 13 is driven by the operation of the link 9 and cuts off the power supply of the hoisting machine 4.

  A driving device 8 is provided for the emergency stop device 11. The drive device 8 will be described with reference to FIG. The driving device 8 operates in a predetermined direction by a change in gas pressure, operates each emergency stop device 11 via the link 9 and the connecting rod 10, and stops the raising / lowering of the car 1. Specifically, it is composed of a cylinder 15 and a piston 14 provided in the cylinder 15. The cylinder 15 is connected to a pressure cylinder 17 that is a pressure source via a pressure pipe 16. A valve 19 that can be opened and closed is provided in the middle of the pressure pipe 16. The valve 19 is provided between a cylinder 15 constituting the driving device 8 and a pressure cylinder 17 serving as a pressure source. When an overspeed detection signal described later is input, the pressure source (pressure cylinder 17) and the driving device 8 are provided. The cylinder 8 is communicated with each other, and the driving device 8 is operated in a predetermined direction by a predetermined pressure state in the pressure cylinder 17.

  The pressure cylinder 17 which is a pressure source is always maintained at a predetermined negative pressure, and the driving device 8 is operated by the piston 14 by a predetermined negative pressure applied to the cylinder 15 via the pressure pipe 16 by the opening operation of the valve 19. Is moved to the right in the figure, and each emergency stop device 11 is operated via the link 9 and the connecting rod 10. Here, the pressure cylinder 17 which is a pressure source is provided with a pump 18 to maintain a predetermined pressure state (negative pressure), and the pressure cylinder 17 is evacuated to maintain a predetermined negative pressure. ing.

  Here, an overspeed detection device 20 is provided for the car 1, and an overspeed detection signal is output when the ascending / descending speed of the car 1 exceeds a predetermined speed. The overspeed detection device 20 uses a known acceleration sensor to integrate the detection signal to obtain the speed, or measures the rotation speed of a roller (not shown) that rolls along the guide rail 6. Anything can be used. Moreover, although the case where this overspeed detection apparatus 20 is provided on the car 1 is shown in the figure, it may be installed in the hoistway 5 or the machine room. When providing in the hoistway 5, what detects a passage speed from the passage time between two predetermined points should just be used, for example. In short, any known speed detection device may be used.

  The acceleration detection signal of the car 1 detected by the overspeed detection device 20 is output as an opening operation command for the valve 19 by a control device (not shown) provided in the car 1.

  In the above configuration, during normal elevator service (during operation), the valve 19 is closed by a control device (not shown), and the pump 18 is controlled so as to always discharge the gas in the pressure cylinder 17. That is, the inside of the pressure cylinder 17 is always maintained at a predetermined negative pressure. In such a normal elevator service, if the elevator 1 exceeds its predetermined speed due to some abnormality, the overspeed detection device 20 detects an overspeed state and outputs an overspeed detection signal. This overspeed detection signal is transmitted to a control device (not shown) and is output as an opening operation command for the valve 19. For this reason, the valve 19 is opened, and the gas in the cylinder 15 is instantaneously moved into the pressure cylinder 17 through the pressure pipe 16 and is discharged out of the cylinder by the action of the pump 18. As the gas moves, the piston 14 moves directly to the right in the drawing to drive the link 9. When the link 9 operates, the power of the hoisting machine 4 is shut off by the link switch 13 and the emergency stop device 11 is operated. By these operations, the car 1 is safely decelerated and stopped.

  In this case, the power required for operating the emergency stop device 11 may be small enough to open the valve 19, and constitutes an elevator device having a small, lightweight, agile and reliable emergency stop function. can do. That is, for example, if an attempt is made to realize such a configuration by an electric mechanism, it is necessary to use a large, powerful solenoid or the like in order to operate the emergency stop device 11 at a high speed. Was inevitable. However, as in this embodiment, since the operation force is obtained by changing the gas pressure, only a slight operation force for opening and closing the valve 19 is required, and the equipment can be reduced in size and weight, And it can be an agile and reliable configuration.

  In addition, although the pump 18 was provided in order to make the pressure cylinder 17 which is a pressure source into a negative pressure, when the pressure cylinder 17 previously evacuated can be connected to the pressure pipe 16 in a cassette-type airtight manner. The above-described pump 18 may be omitted.

  Further, the negative pressure in the pressure cylinder 17 is used as the operating force for the driving device 8, but a positive pressure pressurized to a predetermined pressure by the pump 18 may be used. In this case, as shown in FIG. 3, the pressure pipe 16 from the pressure cylinder 17 is connected to a portion of the cylinder 15 on the left side of the figure from the piston 14 via a valve 19.

  In the case of such a structure, the valve 19 is closed during normal elevator service (during operation). The pump 18 is operated so as to pressurize the gas in the pressure cylinder 17. For this reason, the inside of the pressure cylinder 17 is always maintained at a predetermined positive pressure. When the car 1 is in an overspeed state due to some abnormality, an overspeed detection signal is output from the overspeed detection device 20 and the valve 19 is opened. By this operation, the gas in the pressure cylinder 17 instantaneously moves through the pressure pipe 16 to the left in the drawing in the cylinder 15, moves the piston 14 to the right in the drawing, and drives the link 9. When the link 9 operates, the power of the hoisting machine 4 is shut off by the link switch 13 and the emergency stop device 11 is operated. By these operations, the car 1 is safely decelerated and stopped. In this way, even if positive pressure is used as the operating force of the driving device 8, it operates without any problem.

  Although the pump 18 is used to obtain a positive pressure, an air bag type pressure source may be used without using the pump 18. That is, by opening the valve 19, the pressure in the pressure cylinder 17 may be explosively increased by a chemical reaction or the like.

<Second Embodiment>
FIG. 4 shows a second embodiment of the present invention. In FIG. 4, the basic structure is the same as that of the first embodiment described with reference to FIGS. 1 to 3, but a pressure sensor 21 for measuring and monitoring the pressure inside the pressure cylinder 17 is provided in the car 1. The structure is provided with an atmospheric pressure monitoring control device 22 that receives the signal from the atmospheric pressure sensor 21 to control the operation of the pump 18 and stops the elevator service when the atmospheric pressure in the pressure cylinder 17 cannot be maintained at a specified value. .

  The atmospheric pressure sensor 21 measures the atmospheric pressure in the pressure cylinder 17 and transmits it to the atmospheric pressure monitoring control device 22. The atmospheric pressure monitoring control device 22 determines whether a negative pressure (or positive pressure) necessary for operating the safety device 11 is generated in the pressure cylinder 17, and if it is recognized as abnormal, that is, with a pressure source. If the pressure state in a certain pressure cylinder 17 cannot be maintained at a specified value, the elevator service is stopped.

  With this configuration, in addition to the effects of the first embodiment described above, the elevator service is stopped if there is a problem with the operation of the emergency stop device 11, such as when the pump 18 fails. By doing so, a safer and more reliable elevator apparatus can be obtained.

<Third Embodiment>
Next, a third embodiment will be described. The basic structure is the same as that of the first embodiment described with reference to FIG. 1, but in the third embodiment, a valve operation box 23 that remotely gives a signal for arbitrarily operating the valve 19 is provided. It has a structure. For example, as shown in FIG. 1, the valve operation box 23 is provided on the surface of the control panel 7 provided above the hoistway 5 and is configured to be operable during periodic inspection.

  By operating the valve operation box 23, the valve 19 can be remotely operated, and the above-described operation of the emergency stop device 11 can be generated remotely and artificially at the time of inspection or the like.

  If comprised in this way, in addition to the effect of each embodiment mentioned above, it will become possible to operate the emergency stop apparatus 11 artificially simply at the time of a periodic inspection, etc., and an elevator apparatus with higher maintainability will be obtained. .

<Fourth embodiment>
Next, a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 5, the basic structure is the same as that of the second embodiment described with reference to FIG. 4, but a piston position sensor 24 that detects the position of the piston 14 constituting the driving device 8 is provided in the car 1. When the position of the piston 14 has not returned to the preset service position, the piston position monitoring control device 25 for stopping the elevator service is further provided.

  The piston position sensor 24 constantly monitors the position of the piston 14 and transmits its position information. The piston position monitoring and control device 25 grasps the position of the piston 14 from the received signal, compares it with a predetermined position, and stops the elevator service if abnormal.

  With this configuration, in addition to the effects of the above-described embodiments, the elevator service is stopped when there is a problem in the operation of the emergency stop device 11 such as when the piston 14 or the cylinder 15 breaks down. For this reason, a safer and more reliable elevator apparatus is obtained.

<Fifth embodiment>
Next, a fifth embodiment of the present invention will be described with reference to FIG. In FIG. 6, the basic structure is the same as that of the fourth embodiment described in FIG. 5, but a valve operation sensor 26 that detects the open / close state of the valve 19 is provided, and the open / close state of the valve is abnormal. Further, a valve monitoring control device 27 for stopping the elevator service is further provided.

  This valve operation sensor 26 monitors the open / closed state of the valve 19 and transmits its state information. The valve monitoring control device 27 compares the received state of the valve 19 and a command issued to the valve 19 by a control device (not shown), and if it is abnormal, stops the elevator service.

  With this configuration, in addition to the effects of the above-described embodiments, the elevator service is stopped when there is a problem with the operation of the emergency stop device 11, such as when the opening / closing mechanism of the valve 19 fails. This provides a safer and more reliable elevator apparatus.

  The embodiment shown in FIGS. 4 to 6 shows the case where the pressure source 17 is a negative pressure. However, as shown in FIG. 3, the embodiment is similarly performed when the pressure source 17 is a positive pressure. Of course you can.

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Counterweight 3 ... Wire rope 4 ... Hoisting machine 5 ... Hoistway 6 ... Guide rail 8 ... Drive device 11 ... Emergency stop device 14 ... Piston 15 ... Cylinder 16 ... Pressure piping 17 ... By pressure source A certain pressure cylinder 18 ... Pump 19 ... Valve 20 ... Overspeed detection device 21 ... Atmospheric pressure sensor 22 ... Atmospheric pressure monitoring control device 23 ... Valve operation box 24 ... Piston position sensor 25 ... Piston position monitoring control device 26 ... Valve sensor

Claims (8)

An elevator device provided in the car with an emergency stop device for emergency stop of raising and lowering the car,
An overspeed detection device that outputs an overspeed detection signal when the raising / lowering speed of the car exceeds a predetermined speed;
A driving device that operates in a predetermined direction by a change in gas pressure, and operates the emergency stop device to stop the raising and lowering of the car;
Provided between the driving device and the pressure source. When the overspeed detection signal is input, the pressure source and the driving device are communicated with each other, and the driving device is moved in the predetermined direction according to a predetermined pressure state of the pressure source. A valve that operates to
An elevator apparatus comprising:   The pressure source is always kept at a predetermined negative pressure, and the driving device operates in the predetermined direction by a predetermined negative pressure applied from the pressure source by the operation of the valve. The elevator apparatus as described.   The pressure source is always maintained at a predetermined positive pressure, and the driving device operates in the predetermined direction by a predetermined positive pressure applied from the pressure source by the operation of the valve. The elevator apparatus as described.   The elevator apparatus according to any one of claims 1 to 3, wherein the pressure source includes a pump for maintaining the predetermined pressure state.   The pressure source has an atmospheric pressure sensor that measures and monitors the pressure state. The pump output is controlled by the output of the atmospheric pressure sensor. If the pressure state of the pressure source cannot be maintained at a specified value, the elevator service The elevator apparatus according to claim 4, further comprising an atmospheric pressure monitoring control device that stops the operation.   The elevator apparatus according to any one of claims 1 to 5, further comprising an operation box that gives a signal for arbitrarily operating the valve.   The drive device includes a cylinder capable of communicating with the pressure source via the valve and a piston provided in the cylinder, and a piston position sensor for detecting the position of the piston in the cylinder is provided, and the piston The elevator apparatus according to any one of claims 1 to 6, further comprising: a piston position monitoring control device that stops the service of the elevator when the service position does not return to the preset service position.   The valve operation sensor which detects the open / close state of the valve is provided, and a valve monitoring control device which stops the service of the elevator when it is detected that the valve is not normally opened / closed is provided. The elevator apparatus in any one of Claim 1 thru | or 7.

Images