WO2002098780A1

WO2002098780A1 - Elevator device and car movement limiting device thereof

Info

Publication number: WO2002098780A1
Application number: PCT/JP2001/004566
Authority: WO
Inventors: Takao Nishida
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2001-05-30
Filing date: 2001-05-30
Publication date: 2002-12-12
Also published as: JPWO2002098780A1; JP4896370B2; EP1437320B1; KR100506476B1; EP1437320A1; EP1437320A4; DE60125990T2; DE60125990D1; CN1444539A; CN1184127C; KR20030018058A

Abstract

An elevator device, wherein a fixed member (21) is fixed to the inside of a hoistway, a movable member (23) engaged with the fixed member (21) is mounted on a car (22), a switch device comprises first and second switches (26, 27), the first switch (26) is closed when the movable member (23) is set at a storage position and opened when set at an intermediate position or an engaged position, the second switch (27) is opened when the movable member (23) is set at a storage position or intermediate position and closed when set at an engaged position, and a control device (30) for controlling a drive device (29) stops the operation of the car when the movable member (23) is detected to be set at the intermediate position in an on-car maintenance operation mode.

Description

Description Elevator set-up device and its car movement control device

INDUSTRIAL APPLICABILITY The present invention is used for an elevator apparatus in which an operation mode is switched to a maintenance operation mode on a car during a maintenance operation on a car, and the elevator apparatus for the elevator. The present invention relates to a car movement restricting device for mechanically restricting the movement of a car. Background art

FIG. 7 is a plan view showing a car movement restricting device of the conventional elevator apparatus disclosed in, for example, Japanese Patent Publication No. 2000-200373, and FIG. 8 is a car movement restricting device of FIG. FIG. In the figure, a pair of guide rails 3 for guiding the car 2 up and down are installed in the hoistway 1. A fixed plate 4 having an engagement hole 4 a is fixed to the guide rail 3.

A bracket 6 is attached to the upper beam 5 of the car 2. A lock rod 7 is supported on the bracket 6. The lock rod 7 is manually operated to have an engagement position (the two-dot chain line in the figure) whose leading end is passed through the engagement hole 4a, and a storage position (the solid line in the figure) retracted on the car 2. Is reciprocated linearly between

An operation lever 8 for manually operating the lock rod 7 is attached to the lock rod 7. The bracket 6 is provided with a holding plate 9 for holding the hook bar 7 at the engagement position and the storage position. The holding plate 9 is provided with first and second grooves 9a: 9b into which the operation levers 8 are respectively inserted when the lock bar 7 is in the engagement position and the storage position.

The bracket 6 is provided with a limit switch 10 that is closed when the lock bar 7 is in the storage position. The operation unit 10 a of the limit switch 10 is operated by the rear end of the lock bar 7.

The hoist 11 that raises and lowers the car 2 is controlled by the controller 12. Control device The power supply circuit 13 for supplying electric power to the hoisting machine 11 is provided at 12. The limit switch 10 is connected to the power supply circuit 13. When the limit switch 10 is closed, the power supply circuit 13 is on, and when the limit switch 10 is open, the power supply circuit 13 is off.

Next, the operation will be described. During maintenance work on the car 2, by operating the operation lever 8, the lock rod 7 is slid from the storage position to the engagement position, and the tip of the lock rod 7 is inserted into the engagement hole 4a. . Thereby, the movement of the car 2 is mechanically restricted. At this time, the limit switch 10 is open and the power supply circuit 13 is off. For this reason, the hoisting machine 11 is not accidentally driven.

However, in the conventional car movement restricting device as described above, since only the limit switch 10 detects whether or not the lock bar 7 is in the storage position, the lock bar 7 is properly moved to the engagement position. Could not be detected, that is, whether or not the tip of the lock rod 7 was securely passed through the engagement hole 4a. Also, it was not detected that the lock rod 7 was located at an intermediate position between the storage position and the engagement position. Therefore, when the lock rod 7 was not at the storage position, only a simple control of preventing the driving of the hoist 11 could be performed.

If the limit switch 10 is kept closed due to a failure such as a welding defect, the hoisting machine 11 can be driven while the lock rod 7 is at an intermediate position. Could interfere with the equipment in the hoistway 1 and damage the equipment.c Disclosure of the Invention

The present invention has been made to solve the above-described problems, and can perform finer control in accordance with the position of a movable member for restricting the movement of a car. An object of the present invention is to provide an elevator device and a car movement restricting device capable of improving workability of maintenance work.

A car movement restricting device of an elevator apparatus according to the present invention is a car elevator apparatus including a car that is raised and lowered in a hoistway, a driving device that raises and lowers the car, and a control device that controls the driving device. Used to mechanically regulate the movement of the car during maintenance work on the car. A fixing member fixed to one of the hoistway and the car and having a fixed-side engaging portion; a movable-side engaging portion engaged with the fixed-side engaging portion; A movable member that is provided on the other side of the road or in the car and that can be displaced between a storage position and an engagement position where the movable-side engaging portion is engaged with the fixed-side engaging portion. And a switch device that is connected to the control device, and that detects whether the movable member is in the storage position, the engagement position, or the intermediate position between the storage position and the engagement position. Things.

Further, the elevator apparatus according to the present invention is a car that is raised and lowered in a hoistway, a driving device that raises and lowers the car, a fixing member that is fixed to one of the hoistway and the car, and that has a fixed-side engaging portion A movable-side engaging portion that engages with the fixed-side engaging portion. The movable-side engaging portion is provided in the hoistway and / or the car, and the storage position and the movable-side engaging portion are fixedly engaged. Which position of the movable member, the movable member is displaceable between the engagement position engaged with the portion, the movable member is in the storage position, the engagement position, and the intermediate position between the storage position and the engagement position. And a switch device for selectively detecting between a plurality of operation modes, including a normal mode and an on-car maintenance mode, to control the drive device and to input a signal from the switch device. It has a control device, and the control device When the movable mode is in the car maintenance operation mode, the operation of the car is enabled when it is detected that the movable member is in the stowed position, and the operation of the car is performed when it is detected that the movable member is in the middle position. It is to prevent. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a configuration diagram showing a car movement restricting device of an elevator apparatus according to an example of an embodiment of the present invention,

FIG. 2 is a configuration diagram showing a state in which the arm of FIG. 1 is rotated to an intermediate position,

FIG. 3 is a configuration diagram showing a state in which the arm of FIG. 2 is rotated to an engagement position;

FIG. 4 is a configuration diagram showing a state where the car of FIG. 3 is raised,

FIG. 5 is a flowchart showing the operation of the control device in FIG. 1 in the normal operation mode. FIG. 6 is a flowchart showing the operation of the control device in the car maintenance operation mode in FIG. 1. FIG. 7 is a plan view showing an example of the conventional car movement restricting device of the elevator apparatus, and FIG. 8 is a front view showing the car movement restricting device of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

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

FIG. 1 is a configuration diagram showing a car movement restricting device of an elevator apparatus according to an example of an embodiment of the present invention. In the figure, an engaging plate 21 as a fixing member is fixed to a fixed portion in a hoistway such as a guide rail. The engagement plate 21 is provided with an engagement hole 21a as a fixed engagement portion.

An arm 23 as a movable member is mounted on the car 22 which is raised and lowered in the hoistway. The arm 23 is rotatable about a shaft 24 between a storage position (FIG. 1) and an engagement position (FIGS. 3 and 4). The distal end of the arm 23 is provided with a hook portion 23a as a movable side engaging portion that engages with an outer peripheral portion of the engaging member 21a. A cam 25 is fixed to the arm 23.

The car 22 is equipped with a first switch 26 operated by a cam 25. The first switch 26 has a normally closed contact 26a, and is closed when the arm 23 is in the storage position, and the arm 23 is in the middle position between the storage position and the engagement position (see FIG. 2) and operated by the cam 25 when it is in the engaged position and released.

Also, even when the normally closed contact 26a does not return to its original position despite the arm 23 being returned to the storage position, the first switch 26 is mechanically operated by the arm 23. It is arranged to be forcibly closed.

A second switch 27 operated by the engagement plate 21 is mounted on the arm 23. The second switch 27 has a normally open contact 27a, and is opened when the arm 23 is in the storage position and the middle position, and is closed when the arm 23 is in the engagement position.

The switch device 28 has a first switch 26 and a second switch 27, and detects which of the arm 23 is in the storage position, the engagement position, and the middle position. The car 22 is raised and lowered by the driving force of the driving device 29. The driving device 29 is controlled by the control device 30. The control device 30 operates in the normal mode and the car maintenance mode. The driving device 29 is controlled by selectively switching a plurality of operation modes including the following.

Further, since the first switch 26 is connected in series to a safety circuit (not shown), when the normally closed contact 26a is opened, the power supply to the drive unit 29 is cut off. Therefore, when the arm 23 is in the engaged position, the driving device 29 can operate the car 22, but when the arm 23 is in the middle position or the engaged position, the car 22 can be operated. Is blocked.

However, on the car 22, a bypass switch (not shown) for opening and closing a bypass circuit for short-circuiting (bypassing) the first switch 26 together with an on-car operation switch for operating the car 22. Is provided. Therefore, even when the arm 23 is in the engaged position, the car 22 can be raised and lowered at a low speed by operating the on-car operation switch while operating the bypass switch to close the bypass circuit.

Next, the operation will be described. When the firmware 23 is in the storage position shown in FIG. 1, the first switch 26 is closed and the second switch 27 is open.

As shown in FIG. 2, when the arm 23 is rotated, the first switch 26 is operated by the cam 25, and the first switch 26 is released. Also, the second switch 27 is open because it does not abut against the engagement plate 21.

As shown in FIG. 3, when the arm 23 reaches the engagement position, the first switch 26 is opened, but the second switch 27 is operated by the engagement plate 21 to be closed.

Ό o

When the arm 23 is in the engagement position, the movement of the car 22 is mechanically controlled within the range of the engagement hole 21a even if the brake device (not shown) of the drive device 29 is released. Regulated. For example, when the braking device is released with the counterweight (not shown) heavier than the car 22, the car 22 is raised, but as shown in FIG. By engaging the upper edge of the hole 21a, the elevation of the car 22 is restricted. In the above-described elevator system, when performing maintenance work on the car 22, first, the operation mode is switched to the on-car maintenance operation mode, and the car 22 is moved to the predetermined maintenance position at a low speed. . After this, the arm 23 is rotated to the engagement position,

23 a is engaged with the engaging hole 21 a of the fixing plate 21. This moves the car 2 2 Is regulated and maintenance work is performed on car 22.

After the maintenance work is completed, the arm 23 is returned to the storage position, and the operation mode is returned to the normal operation mode. At this time, as shown in FIG. 4, when the hook 23a is in contact with the periphery of the engaging hole 21a, the bypass switch and the on-car operation switch are simultaneously operated to operate the car 22. Is raised or lowered slightly, and the position of the hook portion 23a with respect to the engagement hole 21a is returned to the position shown in FIG. 3, and then the arm 23 is rotated to the storage position.

Next, FIG. 5 is a flowchart showing the operation of the control device 30 of FIG. 1 in the normal operation mode. In the normal operation mode, first, it is checked whether the arm 23 is at the storage position (step S1). If the arm 23 is not at the storage position, the operation of the car 22 is blocked (step S 2). Thereby, the interference of the arm 23 with the hoistway device is more reliably prevented.

When it is confirmed that the arm 23 is at the storage position, it is confirmed whether the arm 23 is at the engagement position (step S3). Normally, if the arm 23 is in the stowed position, the second switch 27 is open, so it is confirmed that the arm 23 is not in the engaged position, and the car 22 can be operated. (Step S 4). However, if it is detected that the arm 23 is in the engagement position in spite of the detection that the arm 23 is in the storage position, it is determined that a failure has occurred in the switch device 28, and the abnormality is detected. A detection signal is output (step S5).

For example, if the normally open contact 27a of the second switch 27 remains closed due to welding or the like, even if the arm 23 is in the stowed position, the first and second switches 26, 27 Are both closed. In such a case, an abnormality detection signal is output, and the worker repairs or replaces the switch device 28.

Therefore, in the normal operation mode, it is confirmed whether the arm 23 is at the storage position and whether the switch device 28 is out of order, and the car 22 is operated more safely. Next, FIG. 6 is a flowchart showing the operation of the control device 30 of FIG. 1 in the on-car maintenance operation mode. In the on-car maintenance operation mode, it is first checked whether the arm 23 is at the storage position (step S1). When it is confirmed that the arm 23 is in the stowed position, it is confirmed whether the arm 23 is in the engaged position. S3).

If it is confirmed that the arm 23 is not in the engagement position, it is determined that the arm 23 is in the storage position and there is no abnormality in the switch device 28, and the car 22 can be operated (step S). Four ) . Therefore, even in the on-car maintenance operation mode, when the arm 23 is at the storage position, the operation of the car 22 is possible, and the car 22 can be moved to the predetermined maintenance position.

If it is detected that the arm 23 is at both the storage position and the engagement position, it is determined that the switch device 28 has failed, and an abnormality detection signal is output (step S5).

Further, in the on-car maintenance operation mode, even when it is detected that the arm 23 is not at the storage position, it is confirmed whether the arm 23 is at the engagement position (step S6). If it is detected that the arm 23 is neither at the storage position nor at the engagement position, it is determined that the arm 23 is at the middle position, and the operation of the car 22 is blocked (step S7).

Therefore, after the car 22 is moved to the predetermined maintenance position, while the arm 23 is operated, and while the arm 23 is not properly engaged with the engaging plate 21, the car 22 Driving is blocked. For this reason, when the worker is working on the car 22, the car 22 is not moved up and down unless the arm 23 is located at the engagement position.

If it is detected that the arm 23 is not at the storage position but at the engagement position, the operation of the car 22 is prevented, and the release command signal of the brake device of the drive unit 29 can be output. (Step S8). As a result, the brake device can be released, and maintenance work can be performed with the brake device released. Further, as described above, if the bypass switch and the on-car operation switch are simultaneously operated, the car 22 can be operated at a low speed.

According to the car movement restricting device of such an elevator system, the switch device 28 can detect the arm 23 in the storage position, the engagement position, or the intermediate position to detect the arm 23 in the different position. Therefore, finer control can be performed according to the position of the arm 23, and the workability of maintenance work on the car can be improved.

The arm 23 is closed when the arm 23 is in the storage position, and the arm 23 is in the middle position and A first switch 26 that is opened when in the engaged position, and a second switch that is opened when the arm 23 is in the storage position and the middle position, and is closed when the arm 23 is in the engaged position. Since the switch device 28 having the switch 27 is used, the storage position, the engagement position, and the middle position can be detected separately with a simple configuration.

Further, since the first switch 26 is arranged so as to be operated by the arm 23 and forcibly closed when the arm 23 is returned to the storage position, the first switch 26 The first switch 26 can operate normally even when the switch does not self-recover.

Furthermore, the arm 23 is provided with a cam 25 for operating the first switch 26 when the arm 23 is at the middle position or the engagement position, so that the first switch 26 can be more securely operated. Can be operated.

When the operation mode is the car-on-maintenance operation mode, when the controller 23 detects that the arm 23 is in the stowed position, the controller 30 enables the operation of the car 22, and the arm 23 is moved to the middle position or When the car 22 is detected to be in the engaged position, the operation of the car 22 is prevented, so that maintenance work on the car 22 can be performed more safely.

Further, when it is detected that the arm 23 is not in the stowed position when the operation mode is the normal operation mode, the control device 30 prevents the operation of the car 22. Can be more reliably prevented.

Furthermore, when the first and second switches 26 and 27 are both closed, an abnormality detection signal of the switch device 28 is generated, so that the normally open contact of the second switch 27 Failures such as welding of 27a can be easily detected, and reliability can be improved.

Further, only when it is detected that the arm 23 is at the engagement position, the release command signal for the brake device is output, so that the brake device can be released more safely.

Further, when the bypass switch is closed by operating the bypass switch when the arm 23 is in the engaged position, the car 22 can be operated by operating the on-car operation switch, so that the arm 23 is engaged. The car 22 can be raised and lowered even when in the position, and the engaged state of the arm 23 can be easily released. In the above example, the engagement plate 21 is fixed in the hoistway, and the arm 23 is mounted on the car 22. However, the fixing member may be fixed to the car, and the movable member may be provided in the hoistway. . Further, in the above example, the rotatable arm 23 is shown as the movable member, but a movable member that can be slid as shown in FIGS. 7 and 8 may be used.

Claims

The scope of the claims

1. Used in elevators equipped with a car that is raised and lowered in a hoistway, a drive that raises and lowers the car, and a control device that controls the drive, and is used for maintenance work on the car. A car movement restricting device of an elevator device for mechanically restricting the movement of the car,

A fixing member fixed to either the inside of the hoistway or the car and having a fixed side engaging portion;

A movable-side engaging portion that engages with the fixed-side engaging portion; the movable-side engaging portion is provided in the hoistway and the other one of the car; A movable member capable of being displaced between an engagement position engaged with the engagement portion, and

A switch connected to the control device for detecting the position of the movable member in the storage position, the engagement position, and the intermediate position between the storage position and the engagement position; Equipment

A car movement restricting device for an elevator device equipped with a.

2. The switch device comprises: a first switch which is closed when the movable member is at the storage position, and which is opened when the movable member is at the intermediate position and the engagement position; 2. The elevator according to claim 1, further comprising a second switch that is opened when the member is at the storage position and the intermediate position, and that is closed when the movable member is at the engagement position. Equipment movement restriction device.

3. The elevator according to claim 2, wherein the first switch is arranged such that when the movable member is returned to the storage position, the first switch is forcibly closed by being operated by the movable member. Evening equipment cage movement control device.

3. The car movement restricting device of the elevator apparatus according to claim 2, wherein the movable member is rotationally displaced about an axis between the storage position and the engagement position.

5. The car movement restricting device of the elevator apparatus according to claim 4, wherein the movable member is provided with a cam for operating the first switch when the movable member is at the intermediate position or the engagement position.

6. The fixed member is fixed in the hoistway, the movable member is mounted on the car, the first switch is mounted on the car, and the second switch is mounted on the movable member. 3. The car movement restricting device of the elevator device according to claim 2, wherein:

7. The car which is raised and lowered in the hoistway,

A driving device for raising and lowering the car,

A movable-side engaging portion that engages with the fixed-side engaging portion; the movable-side engaging portion is provided in the hoistway and the other one of the car; A movable member capable of being displaced between an engaging position engaged with the engaging portion, the movable member being connected to the storage position, the engagement position, and a position between the storage position and the engagement position. A switch device for detecting which of the intermediate positions is located between them, and controlling the drive device by selectively switching between a plurality of operation modes including a normal mode and a car maintenance mode. A control device to which a signal from the switch device is input

The control device, when the operation mode is the car maintenance operation mode, when the movable member is detected to be in the storage position, enables the operation of the car, and the movable member is An elevator device that prevents the above-mentioned car from operating if it is detected that the car is in the middle position.

8. The elevator according to claim 7, wherein the control device, when the operation mode is the normal operation mode, prevents the operation of the car when it is detected that the movable member is not at the storage position. Evening equipment.

9. The drive device is provided with a brake device, and the control device detects that the operation mode is the car maintenance operation mode and the movable member is at the engagement position. 8. The elevator apparatus according to claim 7, wherein output of the release command signal of the brake device is enabled only when the release is performed.

10. The switch device, wherein the first switch is closed when the movable member is at the storage position, and is closed when the movable member is at the halfway position and the engagement position; The elevator according to claim 7, further comprising a second switch that is opened when the movable member is at the storage position and the intermediate position, and that is closed when the movable member is at the engagement position. apparatus.

11. The elevator apparatus according to claim 10, wherein the control device generates an abnormality detection signal of the switch device when both the first switch and the second switch are closed.

12. On the car, an on-car operation switch for operating the car and a bypass switch for opening and closing a bypass circuit for short-circuiting the first switch are provided. The element according to claim 10, wherein, when in the engaged position, when the bypass switch is operated to close the bypass circuit, the control device enables the operation of the car by operating the on-car operation switch. All night equipment.