JPH0734705A - Inclination amount detecting device for lifter - Google Patents

Abstract

PURPOSE:To perform easy detection of an inclination amount of a lifter without increasing an equipment cost. CONSTITUTION:Wires 4a and 4b are vertically moved and a lifter 1 is elevated. When sensors 13a and 13b attached to the two ends of the lifter 1 pass through dog plates 14a and 14b for recognizing a lifter position disposed in the same level position on both sides of a lifter elevation passage, god plate detecting signals 13a and 13b obtained by the respective sensors are inputted to a computer (a reducer) 12. In this case, from a difference between the two signals, an inclination amount of the lifer l is computed and a result is outputted, whereby an inclination amount of the lifter is easily detected without increasing an equipment cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifter inclination amount detecting device applied to a lifter or the like of a mechanical parking lot facility.

[0002]

2. Description of the Related Art Even in a large lifter, when the lifter is suspended and supported by a single wire, it is not necessary to adjust the length of the wire. Further, when the lifter is suspended and supported by two wires, the amount of tilt of the lifter is manually measured at the time of regular inspection, and the length of the wire is adjusted by a mounting screw or the like.

[0003]

Conventionally, when automatically measuring the inclination of a structure, a pendulum and an angle meter for measuring the inclination are used, or a sensor in which a gyro and a precise inclinometer are combined is used. However, when these detecting devices are used for detecting the tilt amount of the lifter, there is a problem that the equipment cost increases and the adjustment at the time of installation is not easy.

The present invention is proposed in view of the above problems, and an object of the present invention is to provide a lifter tilt amount detection device which can easily detect the lifter tilt amount without increasing equipment costs. And there is a point.

[0005]

In order to achieve the above object, the present invention provides a lifter tilt amount detection device for detecting the tilt amount of a lifter suspended and supported by a plurality of wires, and a lifter tilt amount detection device is provided on both sides of the lifter. Compute the lifter inclination amount by comparing the pair of attached sensors, the pair of lifter position recognition dog plates arranged at the same height position on both sides of the lifter hoistway, and the dog plate detection signals from the above sensors. It has an arithmetic unit.

[0006]

The lifter inclination amount detecting device of the present invention is configured as described above, and the wires move in the vertical direction, the lifter moves up and down, and the sensors attached to both ends of the lifter move in the lifter hoistway. When passing through the lifter position recognition dog plates arranged at the same height on both sides, the dog plate detection signal obtained by each sensor is sent to the calculator, where the lifter tilt amount is calculated from the difference between the two. Then, since the result is output, the tilt amount of the lifter can be easily detected without increasing the equipment cost.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The lifter tilt amount detecting device of the present invention will be described below with reference to an embodiment shown in FIGS. 1 to 3 which is applied to a mechanical parking lot facility. Lifter 1
The front wheel slat conveyor installed on top, 3 the rear wheel slat conveyor installed on the lifter 1, 4a and 4b are two wires, 5a and 5b are motors, 6a and 6b are motors 5a,
The sheaves attached to the output shaft of 5b, 7a and 7b are counterweights, the wires 4a and 4b hang down from the sheaves 6a and 6b in an inverted U shape, and the lower ends of one side of each are attached to both ends of the lifter 1. , The remaining lower ends on one side are attached to the counterweights 7a and 7b.

In FIG. 2, 8 is an encoder directly connected to the motor 5a, 9 is a counter connected to the encoder 6, 10 and 11
Is a data holder connected to the counter 9, and 12 is a subtractor connected to the data holders 10 and 11. 2 and 3, 13a and 13b are a pair of sensors (for example, photoelectric sensors) attached to both sides of the lifter, and 14a and 14b are a pair of lifter position recognition dog plates disposed at the same height position on both sides of the lifter hoistway. Then, the sensor 13a is connected to the data holder 10, and the sensor 13b is connected to the data holder 11.

Next, the operation of the tilt amount detecting device for the lifter shown in FIGS. 1 to 3 will be specifically described. Motor 5a, 5b
Drive the sheaves 6a and 6b to rotate the wire 4
The lifters 1 are moved up and down by moving a and 4b. At this time, the encoder 8 directly connected to the motor 5a sends a pulse signal corresponding to the amount of wire movement to the counter 9, where the pulses are integrated. Since the wire movement amount per pulse is known, the lifter movement amount x is obtained.

On the other hand, the lifter 1 moves up and down, and the lifter position recognizing dog plates 14a, 14 having sensors 13a, 13b attached to both ends thereof are arranged at the same height position on both sides of the lifter hoistway.
When passing b, the dog plate detection signals obtained by the sensors 13a and 13b are sent to the data holders 10 and 11,
The payout amounts x ₁ and x ₂ of the wires 4a and 4b are held. In addition, the payout amounts x ₁ and x ₂ of the wires 4a and 4b are set to the data holder 1.
0 and 11 are sent to the subtracter 12, where the inclination amount Δx of the lifter 1 is calculated from the difference between the two, and the result is output.

If the lifter 1 has no inclination, the dog plate detection signal is simultaneously input to the data holders 10 and 11, and x ₁ = x ₂ , that is, Δx = 0. Also lifter 1
Is output, negative Δx is output, so that it is possible to know the inclination amount of the lifter 1 and the direction in which the lifter 1 is inclined. Therefore, the output from the subtracter 12 is sent to the control device of the motors 5a and 5b. The tilt of the lifter 1 is corrected by controlling the wire feeding amount.

FIG. 4 shows the relationship between the wire feeding amount x and the absolute distance X when the lifter 1 moves. As already mentioned, when automatically measuring the tilt of a structure, a pendulum and a goniometer that measures the tilt are used, or a sensor that combines a gyro and a precise tilt meter is used. However, in the lifter of the mechanical parking lot facility, if the height difference between both ends of the lifter is known, it is not necessary to use such a precise sensor.

However, since the height difference between both ends of the lifter is based on the horizontal line, some horizontal detection is required. If a sign indicating a horizontal line is prepared on the ground side and its relative displacement is measured, the difference between the marks at both ends of the lifter becomes the tilt of the lifter, so that horizontal detection is no longer necessary. The present invention is based on the above-mentioned point. A pair of sensors are attached to both sides of the lifter, and a pair of lifter position recognition dog plates are provided at the same height position on both sides of the lifter hoistway. The dog detection signal is sent to the arithmetic unit, and the dog plate detection signals from the above-mentioned respective sensors are compared with each other to calculate the tilt amount of the lifter (feed amount of two wires).

[0014]

As described above, in the lifter inclination amount detecting device of the present invention, each wire moves up and down, the lifter moves up and down, and the sensors attached to both ends of the lifter are provided on both sides of the lifter hoistway. When passing through each lifter position recognition dog plate arranged at a high position, a dog plate detection signal obtained by each sensor is sent to a calculator, where the tilt amount of the lifter is calculated from the difference between the two and the Since the result is output, the tilt amount of the lifter can be easily detected without increasing the equipment cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lifter of a mechanical parking lot facility to which a lifter inclination amount detection device of the present invention is applied.

FIG. 2 is a system diagram showing an embodiment of a lifter tilt amount detection device of the present invention.

FIG. 3 is a diagram for explaining the operation of the tilt amount detection device.

FIG. 4 is an explanatory diagram showing a relationship between a wire payout amount x and an absolute distance X when a lifter is moved.

[Explanation of symbols]

 1 Lifter 2 Front Wheel Slat Conveyor 3 Rear Wheel Slat Conveyor 4a, 4b Wire 5a, 5b Motor 6a, 6b Sheave 7a, 7b Counterweight 8 Encoder directly connected to the motor 5a 9 Counter 10, 11 Data holder 12 Arithmetic unit (subtractor) 13a, 13b sensor 14a, 14b dog plate for lifter position recognition

Claims (1)

[Claims] 1. A lifter tilt amount detection device for detecting a tilt amount of a lifter suspended and supported by a plurality of wires, wherein a pair of sensors mounted on both sides of the lifter and a lifter hoistway at the same height position. Lifter tilt amount detection characterized by comprising a pair of lifter position recognizing dog plates arranged and a computing device for computing a lifter tilt amount by comparing dog plate detection signals from the respective sensors apparatus.