WO2009093330A1

WO2009093330A1 - Elevator apparatus

Info

Publication number: WO2009093330A1
Application number: PCT/JP2008/051080
Authority: WO
Inventors: Mineo Okada
Original assignee: Mitsubishi Electric Corporation
Priority date: 2008-01-25
Filing date: 2008-01-25
Publication date: 2009-07-30
Also published as: JPWO2009093330A1; KR101044830B1; EP2233423A4; CN101878175A; JP5264786B2; EP2233423A1; CN101878175B; KR20100061744A

Abstract

In an elevator passage, there is disposed a cage position detecting device having a position switch capable of detecting a detection object mounted in a cage. The cage position detecting device detects whether the cage exists in a predetermined region or not according to the presence/absence of the detection object detected by a position switch. A sheave interlocking device includes a displaced member displaced according to the rotating speed of a speed regulator sheave rotated according to the movement of the cage. An overspeed detecting switch capable of detecting the displaced member can be displaced between a first detection position, at which the displaced member is detected when the velocity value of the cage is at a predetermined reference value, and a second detection position, at which the displaced member is detected when the velocity value of the cage is at a second reference value higher than the first reference value. Moreover, the overspeed detecting switch is displaced by an electromagnetic displacement device to the first detection position, when the cage is in a predetermined region, and to the second detection position, when the cage is outside of the predetermined region.

Description

Elevator equipment

The present invention relates to an elevator apparatus having a car that is moved in a hoistway.

Conventionally, an elevator apparatus that operates a safety device when the speed of a car exceeds a predetermined set speed has been proposed. In this conventional elevator apparatus, the position of the car is detected from the amount of rotation of a rotating body that rotates as the car moves, and the set speed is changed according to the position of the car. The set speed decreases as the position of the car approaches the end of the hoistway. Thereby, size reduction of the shock absorber provided in the pit part of the hoistway can be achieved, and the height of the whole hoistway can be shortened (refer to patent documents 1).

JP 2003-104646 A

However, in the conventional elevator apparatus as described above, the position of the car is obtained from the amount of rotation of the rotating body. Therefore, when the elevator apparatus is installed, the relationship between the position of the car and the amount of rotation of the rotating body It is necessary to adjust each height individually. Therefore, it takes time to install the elevator apparatus.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus that can be easily installed and can reduce the hoistway.

The elevator apparatus according to the present invention includes a car that is provided with a detection object, a car that is moved in the hoistway, and a position switch that is provided in the hoistway and can detect the detection object. , A car position detecting device for detecting the presence or absence of a car in a predetermined region located at the end of the hoistway, a speed governor sheave that rotates as the car moves, and a speed governor sheave A sheave interlocking device having a displacement body displaced according to the rotational speed of the vehicle, a first detection position for detecting the displacement body when the value of the speed of the car is a predetermined first reference value, and the value of the speed of the car Based on the information from the overspeed detection switch and the car position detection device that can be displaced between the second detection position and the second detection position where the displacement body is detected when the second reference value is higher than the first reference value. The overspeed detection switch to the first detection position when in a predetermined area. The operation of the elevator is controlled based on the information from the electromagnetic displacement device that displaces the overspeed detection switch to the second detection position and the information from the overspeed detection switch when the car is displaced from the predetermined area. A control device is provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the governor of FIG. It is a longitudinal cross-sectional view which shows a governor when the cage | basket | car of FIG. 1 has remove | deviated from both a lower end part area | region and an upper end part area | region. It is a circuit diagram which shows the electrical connection state of each lower position switch of FIG. 1, each upper position switch, and an electromagnetic magnet. FIG. 5 is a circuit diagram illustrating a state in which all of the lower position switches and the upper position switches of FIG. 4 stop detecting cams. It is a graph which shows the relationship between the normal driving speed of the cage | basket | car of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a machine room 2 is provided in the upper part of the hoistway 1. In the machine room 2, a hoisting machine (driving device) 4 having a driving sheave 3, a deflecting wheel 5 arranged at an interval from the driving sheave 3, and a control device that controls the operation of the elevator. 6 are provided.

A common main rope 7 is wound around the driving sheave 3 and the deflector 5. A car 8 and a counterweight 9 that can move up and down in the hoistway 1 are suspended from the main rope 7. The car 8 and the counterweight 9 are moved up and down in the hoistway 1 by the rotation of the driving sheave 3. When the car 8 and the counterweight 9 are moved up and down in the hoistway 1, the car 8 is guided to the car guide rail (not shown), and the counterweight 9 is guided to the counterweight guide rail (not shown). Is done.

An emergency stop device 10 that prevents the car 8 from falling is provided below the car 8. The emergency stop device 10 is provided with an operation arm 11. The emergency stop device 10 grips the car guide rail by operating the operation arm 11. The movement of the car 8 is prevented by gripping the car guide rail by the safety device 10.

A governor 12 is provided in the machine room 2, and a tension wheel 13 is provided in the lower part of the hoistway 1. The governor 12 includes a governor body 14 and a governor sheave 15 provided in the governor body 14. A governor rope 16 is wound between the governor sheave 15 and the tension wheel 13. One end and the other end of the governor rope 16 are connected to the operation arm 11. Thereby, the governor sheave 15 and the tension wheel 13 are rotated as the car 8 moves.

The governor body 14 grips the governor rope 16 when the rotational speed of the governor sheave 15 reaches a predetermined emergency overspeed. The operation arm 11 is operated when the governor rope 16 is gripped by the governor body 14 and the car 8 is displaced with respect to the governor rope 16.

On the side surface of the car 8, a cam (detected body) 17 is provided along the moving direction of the car 8. In the hoistway 1, a predetermined lower end region located at the lower end (end portion) of the hoistway 1 and a predetermined upper end region located at the upper end portion (end portion) of the hoistway 1 are set. Yes. The lower end region and the upper end region are regions having a predetermined length in the moving direction of the car 8. Further, in the hoistway 1, a lower end car position detecting device 18 for detecting the presence / absence of the car 8 in the lower end region and an upper end car position detecting device for detecting the presence / absence of the car 8 in the upper end region. 19 is provided.

The lower end car position detection device 18 has a plurality of (in this example, three) lower position switches 18a, 18b, and 18c that can detect the cam 17. Each of the lower position switches 18a to 18c is provided in the lower part in the hoistway 1. Further, the lower position switches 18a to 18c are arranged at intervals with respect to the moving direction of the car 8.

The upper car position detector 19 has a plurality (three in this example) of upper position switches 19a, 19b, 19c that can detect the cam 17. Each of the upper position switches 19a to 19c is provided in the upper part in the hoistway 1. Further, the upper position switches 19a to 19c are arranged at intervals with respect to the moving direction of the car 8.

When the car 8 is in the lower end region, at least one of the lower position switches 18a to 18c is operated by the cam 17. When the car 8 is in the upper end region, at least one of the upper position switches 19a to 19c is operated by the cam 17. The lower position switches 18a to 18c and the upper position switches 19a to 19c detect the cam 17 when operated by the cam 17. When the car 8 is out of the lower end region and the upper end region and is in the middle portion of the hoistway 1, the operation by the cam 17 for all the lower position switches 18a to 18c and the upper position switches 19a to 19c is released. Is done.

That is, the lower-end car position detecting device 18 detects the presence or absence of the car 8 in the lower-end region by detecting the presence or absence of the cam 17 by each of the lower position switches 18a to 18c. The upper car position detecting device 19 detects the presence or absence of the car 8 in the upper end area based on the presence or absence of the cam 17 detected by each of the upper position switches 19a to 19c.

The length of the cam 17 is longer than the intervals between the lower position switches 18a to 18c and the upper position switches 19a to 19c. As a result, it is possible to prevent a situation in which all the lower position switches 18a to 18c do not detect the cam 17 when the car 8 is moved in the lower end region. Further, it is possible to prevent the occurrence of a state in which all the upper position switches 19a to 19c do not detect the cam 17 when the car 8 is moved in the upper end region.

The lower position switches 18a to 18c and the upper position switches 19a to 19c are connected in series by an electric wire 20. A car shock absorber 21 located below the car 8 and a counterweight shock absorber 22 located below the counterweight 9 are provided at the bottom (pit portion) of the hoistway 1. The car shock absorber 21 reduces the impact applied to the car 8 when the car 8 receives a collision. The counterweight buffer 22 reduces the impact applied to the counterweight 9 when it receives a collision with the counterweight 9.

Note that FIG. 1 shows a state where the car 8 exists in the lower end region and the two lower position switches 18a and 18b detect the cam 17 at the same time.

FIG. 2 is a longitudinal sectional view showing the governor 12 of FIG. FIG. 3 is a longitudinal sectional view showing the speed governor 12 when the car 8 of FIG. 1 is out of both the lower end region and the upper end region. In the figure, the speed governor 12 is supported by a support 23. The support 23 is operated by the sheave interlocking device 24 that interlocks with the rotation of the governor sheave 15 together with the speed governor 12, and the sheave interlocking device 24, and the operation of the elevator is stopped by receiving the operation. An overspeed detection switch 25 that outputs a stop signal to be output and an electromagnetic displacement device 26 that displaces the overspeed detection switch 25 are supported.

The sheave shaft 27 of the governor sheave 15 is horizontally supported by the governor body 14 via a bearing 28. A driving bevel gear 29 is fixed to the end portion of the sheave shaft 27.

The sheave interlocking device 24 is provided on the driven shaft 30, the driven shaft 30 arranged along the vertical direction, the driven bevel gear 31 that is fixed to the lower end portion of the driven shaft 30 and meshes with the driving bevel gear 29, and the driven shaft 30. A displacement body 32 that can be displaced with respect to the driven shaft 30 in a direction (predetermined direction) along the shaft 30 and a centrifugal displacement device 33 that displaces the displacement body 32 according to the rotational speed of the driven shaft 30 are provided. Yes.

The driven shaft 30 is supported by the support body 23 via a bearing 34. The rotation of the sheave shaft 27 is transmitted to the driven shaft 30 via the driving bevel gear 29 and the driven bevel gear 31. Accordingly, the driven shaft 30 is rotated according to the rotation of the governor sheave 15.

The centrifugal displacement device 33 is provided on the driven shaft 30. Further, the centrifugal displacement device 33 is rotated integrally with the driven shaft 30. Further, the centrifugal displacement device 33 is slidable on the driven shaft 30 and a pair of arms 35 that can be rotated with respect to the upper end portion of the driven shaft 30, a fly ball 36 provided at the tip of each arm 35. It has a sliding cylinder 37 that is passed through, a link member 38 that interlocks each arm 35 and the sliding cylinder 37, and a balance spring 39 that biases the sliding cylinder 37 downward.

Each fly ball 36 receives a centrifugal force corresponding to the rotational speed of the driven shaft 30 and is displaced according to the received centrifugal force. The sliding cylinder 37 is displaced in the direction along the driven shaft 30 in accordance with the displacement of each flyball 36. That is, when the rotational speed of the driven shaft 30 increases, the fly balls 36 are displaced in directions away from each other, and the sliding cylinder 37 is displaced upward against the urging force of the balance spring 39. Further, when the rotational speed of the driven shaft 30 decreases, the fly balls 36 are displaced in a direction approaching each other, and the sliding cylinder 37 is displaced downward by the biasing force of the balance spring 39.

The displacement body 32 can be displaced together with the sliding cylinder 37. Thereby, the displacement body 32 is displaced in the direction along the driven shaft 30 according to the rotational speed of the governor sheave 15. The displacement body 32 is rotatable with respect to the sliding cylinder 37 and the driven shaft 30. Therefore, even if the sliding cylinder 37 and the driven shaft 30 are rotated, the state of the displacement body 32 is maintained without being rotated. Further, the displacement body 32 includes a driven cylinder 40 that is slidably passed through the driven shaft 30 and an operation portion 41 that protrudes from the outer peripheral surface of the driven cylinder 40.

The overspeed detection switch 25 is disposed on the radially outer side of the driven cylinder 40. The overspeed detection switch 25 can be displaced in the direction in which the displacement body 32 is displaced (that is, the vertical direction) by the guide of the guide member 42 provided on the support body 23. Further, the overspeed detection switch 25 can be displaced between a predetermined first detection position (FIG. 2) and a second detection position (FIG. 3) located above the first detection position.

The overspeed detection switch 25 includes a switch body 43 and a switch lever 44 provided on the switch body 43 and protruding toward the displacement body 32 side. The operation unit 41 can operate the switch lever 44 by the displacement of the displacement body 32 with respect to the overspeed detection switch 25. The overspeed detection switch 25 detects the displacement body 32 when the switch lever 44 is operated by the operation unit 41. A stop signal for stopping the operation of the elevator is output from the switch body 43 by the detection of the displacement body 32 by the overspeed detection switch 25.

The control device 6 controls the operation of the elevator based on information from the overspeed detection switch 25. In this example, the control device 6 receives the stop signal from the overspeed detection switch 25, determines that an abnormality has occurred in the speed of the car 8, and performs control to stop the operation of the elevator.

The value of the speed (operation stop speed) of the car 8 when the overspeed detection switch 25 detects the displacement body 32 (that is, outputs a stop signal) is the value when the overspeed detection switch 25 is in the first detection position. (FIG. 2), a predetermined first reference value lower than the rated speed value of the elevator, and when the overspeed detection switch 25 is in the second detection position (FIG. 3), a predetermined higher value than the rated speed of the elevator. The second reference value (for example, a speed 1.3 times the rated speed) is set. The second reference value is set to a value lower than the emergency overspeed value at which the safety device 10 operates.

The electromagnetic displacement device 26 receives power from a biasing spring (biasing body) 45 that biases the overspeed detection switch 25 in a direction to be displaced to the first detection position, a plunger 46 that is in contact with the switch main body 43, and power supply. Accordingly, the overspeed detection switch 25 has an electromagnetic magnet 47 that displaces the plunger 46 in a direction in which the overspeed detection switch 25 is displaced to the second detection position against the urging force of the urging spring 45.

The overspeed detection switch 25 is displaced to the first detection position when power supply to the electromagnetic magnet 47 is stopped. Further, the overspeed detection switch 25 is displaced to the second detection position against the urging force of the urging spring 45 by supplying power to the electromagnetic magnet 47.

FIG. 4 is a circuit diagram showing an electrical connection state of the lower position switches 18a to 18c, the upper position switches 19a to 19c and the electromagnetic magnet 47 of FIG. FIG. 5 is a circuit diagram showing a state where all of the lower position switches 18a to 18c and the upper position switches 19a to 19c of FIG. FIG. 4 is a diagram showing a state in which only the two lower position switches 18a and 18b detect the cam 17.

In the figure, the lower position switches 18a to 18c, the upper position switches 19a to 19c, and the coils of the electromagnetic magnet 47 are connected in series by the electric wire 20 together with the DC power supply 48.

The lower position switches 18a to 18c and the upper position switches 19a to 19c have contacts that open and close depending on whether or not the cam 17 is detected. The contacts of the lower position switches 18a to 18c and the upper position switches 19a to 19c are opened when the cam 17 is detected and closed when the cam 17 is stopped.

Thus, when all of the lower position switches 18a to 18c and the upper position switches 19a to 19c stop detecting the cam 17, all the contacts are closed, and the power supply to the coil of the electromagnetic magnet 47 is supplied to the DC power supply. 48. Further, when at least one of the lower position switches 18a to 18c and the upper position switches 19a to 19c detects the cam 17, some of the contacts are opened, and power supply to the coil of the electromagnetic magnet 47 is stopped. The

As shown in FIG. 5, the overspeed detection switch 25 is used when the lower position switches 18a to 18c and the upper position switches 19a to 19c all stop detecting the cam 17 (that is, the car 8 is at the lower end. The electromagnetic displacement device 26 is displaced to the second detection position (when it is out of both the partial area and the upper end area). Further, as shown in FIG. 4, the overspeed detection switch 25 is operated when at least one of the lower position switches 18a to 18c and the upper position switches 19a to 19c detects the cam 17 (that is, the car 8 Is located in either the lower end region or the upper end region) by the electromagnetic displacement device 26 to the first detection position. That is, the electromagnetic displacement device 26 displaces the overspeed detection switch 25 between the first detection position and the second detection position based on information from each of the lower car position detection device 18 and the upper car position detection device 19. Let

FIG. 6 is a graph showing the relationship between the normal operation speed and the operation stop speed of the car 8 in FIG. 1 and the position of the car 8. As shown in the figure, the value of the operation stop speed 51 is higher than the normal operation speed 52 of the car 8 at all positions where the car 8 moves. When the car 8 is in either the lower end region or the upper end region, the overspeed detection switch 25 is displaced to the first detection position (FIG. 2), and the value of the operation stop speed 51 is the first reference value V _os1. It has become. Further, when the car 8 is out of both the lower end region and the upper end region and is in the intermediate portion in the hoistway 1, the overspeed detection switch 25 is displaced to the second detection position (FIG. 3), and the operation stop speed is increased. value of 51 is in the high second reference value V _os2 than the first reference value V _os1. The first reference value V _os1 is lower than the rated speed value V ₀ , and the second reference value V _os2 is higher than the rated speed value.

Next, the operation will be described. When the car 8 is moved at the normal operation speed 52, the speed of the car 8 does not reach the operation stop speed 51, so that the operation of the elevator is forcibly stopped by the information from the overspeed detection switch 25. There is no.

When the speed of the car 8 increases for some reason and reaches the operation stop speed 51, a stop signal is sent from the overspeed detection switch 25 to the control device 6. When the control device 6 receives the stop signal, the operation of the elevator is forcibly stopped by the control device 6.

After that, when the speed of the car 8 further increases and reaches an emergency overspeed despite the operation stop control by the control device 6, the speed governor rope 16 is gripped by the speed governor 12. The Thereby, the movement of the governor rope 16 is stopped, and the car 8 is displaced with respect to the governor rope 16.

When the car 8 is displaced with respect to the governor rope 16, the operation arm 11 is operated, and the operation for gripping the car guide rail is performed by the emergency stop device 10. As a result, a braking force is directly applied to the car 8.

Next, the operation when the value of the operation stop speed 51 is switched will be described. When the car 8 is in the middle of the hoistway 1, all of the lower position sensors 18a to 18c and the upper position sensors 19a to 19c are stopped from detecting the cam 17. At this time, power is supplied to the electromagnetic magnet 47, and the overspeed detection switch 25 is displaced to the second detection position. Thereby, the value of the operation stop speed 51 is set to the second reference value.

When the car 8 moves and enters either the upper end region or the lower end region from the middle part of the hoistway 1, any one of the lower position sensors 18a to 18c and the upper position sensors 19a to 19c detects the cam 17. To do. Thereby, the power supply to the electromagnetic magnet 47 is stopped, and the overspeed detection switch 25 is displaced from the second detection position to the first detection position. The value of the operation stop speed 51 is switched to the first reference value by the displacement of the overspeed detection switch 25 to the first detection position.

When the car 8 enters the intermediate portion of the hoistway 1 from either the upper end region or the lower end region, the value of the operation stop speed 51 is switched from the first reference value to the second reference value by the reverse operation. It is done.

In such an elevator apparatus, the car 8 in the lower end region and the upper end region is determined depending on whether the cam 17 is detected by the lower position switches 18a to 18c and the upper position switches 19a to 19c provided in the hoistway 1, respectively. The presence / absence of the vehicle 8 is detected, and the value of the operation stop speed 51 that is a criterion for determining whether the speed of the car 8 is abnormal is switched based on the presence / absence of the car 8 in the lower end region and the upper end region. Therefore, the value of the operation stop speed when the car 8 is in the lower end region and the upper end region can be made lower than the rated speed. Therefore, at a location near the terminal end of the hoistway 1, the elevator operation can be stopped at a stage where the speed of the car 8 is lower than the rated speed. Thereby, the deceleration distance of the car 8 can be shortened, and the car shock absorber 21 and the counterweight shock absorber 22 can be reduced in size. In addition, the height of the hoistway 1 can be reduced. Further, by installing the lower position switches 18a to 18c and the upper position switches 19a to 19c in the hoistway 1, the relationship between the position of the car 8 in the hoistway 1 and the movement amount of the car 8 is set for each hoistway 1. Since there is no need for adjustment, even if the height of each hoistway 1 is different, the elevator apparatus can be easily installed only by adjusting the position and number of the lower position switch and the upper position switch.

Further, since the length of the cam 17 is longer than the interval between the lower position switches 18a to 18c and the interval between the upper position switches 19a to 19c, when the car 8 is in the upper end region and the lower end region, It can be prevented that all the lower position switches 18a to 18c and the upper position switches 19a to 19c are not detected by the cam 17. Thereby, the presence or absence of the cage | basket | car 8 in a lower end part area | region and an upper end part area | region can be detected more reliably.

In the above example, the first reference value V _os1 is set lower than the rated speed value V _0. However, the first reference value V _os1 may be set higher than the rated speed value V ₀ .

Claims

A car provided with a body to be detected and moved in a hoistway;
A position switch provided in the hoistway and capable of detecting the object to be detected; and the presence or absence of detection of the object to be detected by the position switch in the predetermined region located at the end of the hoistway. A car position detector that detects the presence or absence of a car,
A governor sheave that is rotated as the car moves,
A sheave interlocking device having a displacement body that is displaced according to the rotational speed of the governor sheave;
A first detection position for detecting the displacement body when the value of the speed of the car is a predetermined first reference value; and a second reference value where the value of the speed of the car is higher than the first reference value. An overspeed detection switch that can be displaced between a second detection position for detecting the displacement body,
Based on information from the car position detection device, when the car is in the predetermined area, the overspeed detection switch is displaced to the first detection position, and the car is out of the predetermined area. And an electromagnetic displacement device for displacing the overspeed detection switch to the second detection position, and a control device for controlling the operation of the elevator based on information from the overspeed detection switch. apparatus.
The car position detecting device has a plurality of the position switches arranged at intervals from each other along the moving direction of the car,
2. The elevator apparatus according to claim 1, wherein a length of the detected object along a moving direction of the car is longer than an interval between the position switches.