JP2000186437A - Detection device for rope body of lift device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection device to detect whether a lift device lifts horizontally in a pair at a low cost. SOLUTION: A detection device detects an abnormality by judging the differences between the phases of detection devices 19 arranged at a plurality of places of a lift device without directly detecting abnormality in the drive force applied to a lift device driving section 11. This detection is done by fixing one end of a rope body 25 to the lift device and winding the rope around the disk wheels 17a and 18a pivotally mounted at the top positions of the lift device, and hanging a weight W at the other end of the rope for giving the rope tension. In addition, first and second disks 17 and 18 interlocked with the disk wheels 127a and 18a are provided to detect the rotation by the notches made in the first and second disks 17 and 18. Thus, the horizontal motion of the lift device can by detected by simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device which moves an up / down lift via a lifting chain by mounting an article on the lifting / lowering lift. It relates to a detection device,
This is an improved version of Japanese Patent Application No. 4-119507.

[0002]

2. Description of the Related Art Conventionally, a detecting device of an elevating device provided with an elevating lift that moves up and down via a cord-like body fixes four corners of an elevating member, and a spring is attached to a cord-like body suspended from an elevating drive unit by a spring. An energized actuator was provided, and the actuator was provided with a limit switch to serve as a detection device. For example, there is an invention disclosed in Japanese Patent Application Laid-Open No. Sho 62-264199, but it is certainly effective in detecting when the cord is loosened or when one of the two is elongated.

[0003] However, if a part of the elevating lift makes contact or the like when ascending, even if a large load is applied to the one end side of the elongate lift, it cannot be detected that the elongate body is in tension, and The leveling of the lifting lift in the space is impaired, which leads to an accident that damages the mounted equipment.In addition, if the number of floors in the storage room is large, the length of the cord is longer and the weight is increased, so it is difficult to adjust the pressing force of the actuator In addition, there is a disadvantage that this detection device is expensive.

Further, pulleys are rotatably mounted on the upper and lower positions of the right and left lifting lifts, and a wire is wound around the pulleys endlessly, and a part of the wire is fixed to the lifting lift. There is a detection device that detects the rotation speed of the left and right pulleys. In this detector, the wire is wound around the upper and lower pulleys at the elevating position. Therefore, if the elevating device is high-rise, the error due to wire elongation or slippage is large and cannot be detected accurately. The device for counting was expensive.

Further, in Japanese Patent Application No. 4-119507, since the same chain is used for both the detection chain and the drive chain of the lifting / lowering lift, when the lifting / lowering lift is lowered, the detection weight is reduced by its own weight. There is a disadvantage that the disk may be rotated normally and an instantaneous stop command cannot be issued.

[0006]

SUMMARY OF THE INVENTION The present invention can easily issue a stop command to the drive motor even if any abnormality such as looseness or tension of the chain occurs because the lifting / lowering lift operates normally. Adjustment of the allowable limit of the leveling of the lifting lift according to the characteristics of the device is easy and easy, only by changing the size of the projections and notches, without relying on a computer program change by a specialist engineer, and
The task is to create a device that anyone can use.

To this end, a disk wheel is rotatably mounted on the upper part of the elevating space, and a chain which is interlocked with the elevation of the elevating lift is wound around the disk wheel which is not interlocked with the driving device. Since the linear movement in which the lifting / lowering lift moves up and down can be directly converted into the rotation of the disk wheel, the present invention provides an inexpensive detection device which can detect promptly and accurately, is safe, and has a small number of parts.

[0008]

In order to solve the above-mentioned problems, a lifting device according to claim 1 is provided with a lifting space 8 in which a lifting lift 2 moves up and down, and a storage room 9 adjacent to the lifting space 8 is provided on a plurality of floors. The lift 5 is suspended from the chain 5 wound around the drive motor 12 above the lift space 8, and a detection device 19 for detecting the horizontal position of the lift 2 is provided.

In the upper part of the elevating space 8, there are provided driven wheels 16 in which a lifting lift is rotatably mounted on a driving sprocket 15 for driving the lifting and lowering, and the driven wheels 16 are divided and the chain 5 is wound up and down. It is fixed to the lift. The detection device 19 is provided with a first disk 17 and a second disk 18 provided with a projection 23 and a notch 24, and turns on the projection 23 and the notch 24 of the first disk 17 and the second disk 18 when the current is turned on. Detection can be performed by switching OFF.

The chain detecting device of the lifting device according to the present invention is separate from the drive unit of the lifting lift, and a pair of each of the disk wheels 17 around which the rope 25 is linked to the lifting movement.
a, 18a, each disk wheel 17a
The control panel 21 controls the rotation of the drive motor 12 by detecting the phase difference between the detection devices 19 by interlocking the first disk 18 or the second disk 18 with the first disk 18a.

Further, in the second aspect, the controller 20 determines the detection signal of each detection device 19 and, when there is an abnormality, transmits a command to stop the rotation of the drive motor 12 via the control panel 21. .

[0012]

According to the present invention having the above-described structure, according to the first aspect of the present invention, the cord-like body has a function of converting a linear motion in the elevating space into a rotary motion by the disk wheel in accordance with the up / down lift. is there. By this action, when the lift / lift moves up and down and comes into contact with a protruding bogie / article, etc. from the storage room, of the four ropes linked to the lift / lift, the rope on the contacted side is tensioned. In this state, the disc wheel wound around the cord-like body cannot be rotated, but the other three disc wheels are rotating, and the protrusions of the first and second discs provided on each disc wheel are provided. There is an effect that the drive motor can be controlled from the control panel by detecting the portion and the cut portion.

Moreover, this detecting device detects the protrusion and the cut portion of the disk by the phase difference for switching the current by ON / OFF. The phase is synchronized in a normal state, and the phase is shifted in an abnormal state. Therefore, the determination can be easily performed by the controller of the DC power supply. Furthermore, since the cable-like body separate from the chain in which the lifting lift is suspended may be wound around a disk wheel rotatably mounted on the upper part of the lifting space, there is an effect that the detection can be performed promptly.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a parking tower 1 which can be stored above and below the ground. The parked car is at the landing 1 on the ground surface GL
Ride 0. The landing 10 forms a safe passage without a gap integrated with a comb-shaped lift floor 2 and a movable floor F having comb teeth so as to close the gap between the comb teeth of the lift 2. . The section adjacent to the landing 10 can be used as a passage for people or a waiting room S.

The storage on the ground floor is lifted by the lift 2 instructed by the comb-shaped member of the automobile tire by the operation panel 22 and winding up the chain 5 by the lift drive unit 11. When stopping slightly above the designated floor, the traversing tray 7 moves from the storage room 9 to the elevating space 8, and the elevating lift 2 starts lowering, and the comb teeth of the traversing tray 7 formed in a symmetrical direction with the comb teeth of the elevating lift 2. The traversing tray 7 returns to the storage room 9 and the lifting / lowering lift 2 also returns to the position of the landing 10 and is completed.

In the storage on the basement floor, the lift 2 equipped with an automobile is slightly raised above the ground surface GL by the operation to be performed, and the movable floor F forming the passage is stored under the floor on the left side of FIG. When the lift space 8 is opened, the lift 2 descends and is housed in the traversing tray on the designated floor as before, and the lift 2 rises to the landing 10 and returns to the lift space 8 integrally with the moving floor F. A passage is formed and the process is completed.

The elevator 11 of the parking tower 1 will be described with reference to FIG. The lifting lift 2 has hanging portions 4 fixed to the front and rear ends, and guide rollers 6 are pivotally mounted on the upper and lower ends of the hanging portions 4, and is guided vertically upward and downward by the guide rails 3.
The chain 5 has one end fixed to the suspension unit 4, is wound around a driven wheel 16 which is mounted on the upper end of the guide rail 3, is wound around a driving sprocket 15, and the other end is a weight 13.
, And four places of the lift 2 are hung horizontally.

The drive sprocket 15 is fitted on the counter shaft 14 and is rotated by the drive of the drive motor 12 to move the lift 2 up and down. The driven wheels 16 are sprockets provided at the upper ends of four guide rails 3 freely pivotally mounted at positions for vertically moving the lift 2 vertically along the guide rails 3. Four driven wheels 16 are provided with disk wheels 17a. 18a is axially mounted on the disk wheel 1
7a. 18a, the first disk 17 and the second disk 18, which are a set of two places, are interlocked with each other. 18a may be fixed to the first and second discs 17 using a transmission member.
· 18 may be rotatably mounted on the shaft.

Disk foil 17a. 18a has a rope 25 wound thereon, and can be accurately rotated with respect to the movement of the rope 25. The cord 25 may be made of a chain, a wire, a belt, a rope, or the like, and may not be strong against a load, as long as the linear movement amount can be converted into a rotation amount. The wire 25 is wound around the disk wheel 17a or the disk wheel 18a with one end fixed to the suspension unit 4.
The wire 25 is freely lifted around one of the wires a in such a manner that the other end of the wire 25 is tensioned. In this embodiment,
The tension of the cord-like body 25 is suspended by the weight W to make the cord-like body 25 long enough to move the lift 2 between the highest position and the lowest position. The state body 25 is movable.

Each of the first and second disks 17 and 18 may be a thin disk made of metal, but is provided with a projection 23 or a cutout 24 on its outer peripheral portion.
4 is provided with a detecting device 19. In the present embodiment, the detection device 19 will be described using a proximity switch.
FIG. 3A shows the shape of the detecting device 19 for detecting the projecting portion 23 of the first disk 17 and the projecting portion 23. The projecting portion is determined by the diameter of the first disk 17 or the rotation ratio interlocked with the disk wheels 17a and 18a. The size of 23 has been changed.

FIG. 3B shows the shape of the disk 18.
The first disk 17 is provided with a cutout portion 24 smaller than the protrusion portion 23. As shown in FIGS. 3D and 3E, the protrusion portion 23 is displayed as waveforms 1A and 1B, and the cutout portion 24 is displayed as waveforms 2A and 2B. I have. The waveform of the time chart of the first disk 17 is shown in FIG. 3C, and the waveform 1A of the detecting device 19 to be detected has a larger width than that of the second disk 18 and is shown in FIG. This waveform is shown on the disk wheel 17
In addition to showing the rotation state of the a / 18a, it also shows the state of suspension of the lifting / lowering lift 2. If the lifting / lowering lift 2 should be abnormal, the rotation of the disk wheels 17a / 18a fluctuates. Projection 23 or cut 2
4 also fluctuates, so that the cycles of the waveforms 1A, 2B, 2A, and 2B are different, and the waveforms are as shown in FIGS.

Next, an operation for actually detecting an abnormality of the lifting lift 5 of the lifting device will be described.
FIG. 4 is a connection diagram of the detection device 19 provided on the second disk 18 and the detection device 19 provided on the second disk 18.
The switch SW1 / SW2 is turned off when the protruding portion 8 is detected, and the switches SW1 and SW2 are turned on when the notch 24 is detected. FIG. 3C shows the first and second disks 17.
FIG. 18 is a time chart of FIG. 18, in which the detecting device 19 that has detected the cut portion 24 of the first disk 17 turns on the switch SW1 and sends a signal to the switch SW2 as shown in FIG. Is in the area of the projection 23 and turns off the switch SW2 as shown in FIG.
Due to this state, no signal can be sent to the control panel 21.

However, in the abnormal state shown in the second half of FIG. 3C, the cut portion 24 of the second disk 18 enters the area of the cut portion 24 of the first disk 17, and the switch SW1
To the ON state and the switch SW2 to the ON state,
The signal circuit is connected to the control panel 21 to pass a signal, and the drive motor 12 is stopped at the stop point T. Further, the detection device 19 in which the controller 20 is interposed in the front circuit of the control panel 21 includes the first disk 17 and the second disk 18
Are input to the controller 20 as a set, the controller 20 checks the positions of the waveforms 1A and 2B, determines whether the waveform is normal or abnormal, and when the waveform 2B deviates from the waveform 1A,
A signal may be transmitted from the controller 20 to the control panel 21, and the control panel 21 may transmit a stop command to the drive motor 12.

FIG. 4 shows the controller 20, which includes a DC power supply. When a current is supplied to the controller 20, the control panel 21 makes a differential and issues a command to stop the drive motor 12. The detecting device 19 includes the first and second disks 17.
18 and the ON / O
Repeat FF. The current of the controller 20 is normal when the negative electrode is supplied to the detection device 19 and the ON / OFF switch function is always in a disconnected state, and when the phase of the first disk 17 and the second disk 18 is shifted, the detection device 19 When the ON / ON state occurs, the negative electrode is energized, a current flows through the control panel 21 and a signal for stopping the drive motor 12 is issued.

In FIG. 2, the first disk 17 and the second disk 18 are one pair on the left and right, but they may be one pair on the front and rear. Although the example in which the protrusion 23 and the cutout 24 are detected is shown, a combination of the protrusion 23 or the cutout 24 may be used. For example, as shown in FIG. 5A, the waveform 1A is synchronized with the waveform 2B. If the synchronization is lost, an abnormal signal is generated and the operation is stopped at the stop point T.
In addition, if a method is adopted in which a timer is provided for the waveform so that an abnormality occurrence signal is output if the next waveform 1B is not displayed within the time set for the next waveform 2B within the time set for the waveform 2B, a more secure method is adopted. become. Further, the projections 23 may have the same width and the waveforms 1A and 1B may be shifted from each other, as shown in FIG.

Further, the tension of the cord-like body 25 is performed by the weight W. However, a winding drum is arranged at the highest position of the lifting / lowering lift 2, and the tension is wound around the disk wheels 17a and 18a, and the lifting / lowering lift is lifted. 2, when the lift 2 rises, the disk wheels 17 a and 18 a can be constantly tensioned to detect the rise of the rope 25 by a winding spring built in the winding drum, and the lift can be detected. When the lift 2 descends, it can be detected in a tensioned state by overcoming the urging force of the winding spring.

The detection of abnormality is to instantaneously issue a stop command to the lifting / lowering drive device 11 when the sailor of the lifting / lowering lift 2 comes off, thereby stopping the lifting / lowering operation of the lifting / lowering lift 2. For example, when the lift 2 is descending, the lift 2
Are in contact with each other and tilt, the cord 25 fixed to one of the lifting / lowering lifts 2 normally rotates the disk wheel 17a and rotates the first disk 17. Since the other lifting lift 2 is stopped, the disk wheel 18a is stopped.
Does not rotate, the second disk 18 is also stopped.

Accordingly, a phase difference occurs between the first disk 17 and the second disk 18, and the rotation of the lifting drive 11 is stopped by the command of the control panel 21, and the lifting of the lifting lift 2 is stopped. Thus, if there is an abnormality in the elevating operation of the elevating lift 2, it can be stopped instantaneously.

[0029]

According to the first aspect of the present invention, the detecting device is not directly connected to the suspended chain on the driving side which raises and lowers the lifting lift, and the detector is attached to the cord-like body which interlocks with the lifting and lowering of a completely separate lifting lift. With the provision of (1), it is possible to provide an accurate and prompt response so that the apparatus is safe. Moreover, the number of parts is small, so that there is little trouble. In the invention of claim 2, since the rotation of the drive motor is stopped when the detection device detects an abnormality, there is an effect that there is no accident and safety is achieved.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a multistory parking tower employing the present invention.

FIG. 2 is a perspective view of a lifting drive unit.

FIGS. 3A and 3B show shapes of first and second disks. (C) is a time chart of the disk rotation operation of the detection surface of the detection device. (D) is a detection time chart of the first disk detection device. (E) is an output time chart of the second disk detecting device.

FIG. 4 is a wiring diagram illustrating a detection device.

FIG. 5 (a) shows a waveform when the detection position is changed with the same protrusion on the disk. (B) A waveform in which the protrusions of the disk are the same and synchronized by the protrusions.

[Explanation of symbols]

 2. Elevating lift 3 Guide rail 5. Chain 8. Elevating space 9. Storage room 11. Lifting drive unit 12. Drive motor 16. Driven wheel 17. First disk 17a. Disk wheel 18. Second disk 18a. Disc wheel 19. Detector 20. Controller 23. Projection 24. Notch 25. Cord 1A. First waveform 2A. First waveform 1B. Second waveform 2B. Second waveform Stop point W. weight

Claims (2)

[Claims] A lift space for vertically moving the lift, a plurality of storage rooms adjacent to the lift space are erected over a plurality of rooms, and the lift is suspended from a chain wound around a drive motor above the lift space; In an elevating device equipped with a detecting device for detecting a horizontal position of the elevating lift, a cord-like body is provided which enters and exits between the most elevated position and the most lowered position of the elevating lift, and a plurality of disk wheels are provided in the vicinity of the most elevated position of the elevating lift. A first disk and a second disk provided at a location and provided with a projection and a notch, and a detection device that converts the protrusion and the notch of the first and second disks into an ON / OFF current and detects the current; And a first end connected to the disk wheel by winding the rope around each of the disk wheels, fixing one end of the rope in such a manner as to be interlocked with the elevating lift.
The control device controls the rotation of a drive motor by detecting the phase difference of each detection device by interlocking a disk and a second disk connected to a disk wheel at another point, and the cable of the lifting device is characterized in that Detection device. 2. The apparatus according to claim 1, wherein when the controller determines that the detection signal of each of the detection devices is abnormal, the controller transmits a command to stop the rotation of the drive motor via the control panel. Detection device.