JPH0616000Y2 - Automatic control system for vehicle lift - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic control system for a vehicle lift, which is capable of automatically performing a series of operations from adjustment of the jack point position to lift up.

(Prior Art) A conventional so-called separate lift is disclosed in, for example, Japanese Utility Model Laid-Open No. 54-1.
As shown in Japanese Patent No. 33572, a pair of lift arms is provided at the top of a pair of lift cylinders that can move up and down so as to be rotatable and extendable. When a vehicle is lifted up by this lift, This is done by manually adjusting the amount of rotation and expansion / contraction displacement, aligning the attachment position of each lift arm with the jack point of the vehicle, and then raising the lift cylinder.

(Problems to be solved by the device) However, in the case of a separate lift, the position adjustment of the lift arm as described above is generally complicated, and in actuality, the work actually goes back and forth on both sides of the vehicle where the jack point is located, As a result of being forced to work in a cramped low position, there was a problem that workability and work efficiency were extremely poor.

The present invention eliminates such manual work and automates a series of work from adjustment of the jack point position to lift-up to improve the efficiency and workability of this type of work. An object is to provide an automatic control device.

(Means for Solving Problems) For this reason, the automatic control apparatus for a vehicle lift according to the present invention has a pair of lift arms rotatably provided on the upper end of a lift cylinder that can be raised and lowered. A vehicle lift having an attachment holder movably provided and an attachment capable of mounting a jack-up point of a vehicle on the holder, wherein a turning actuator of the arm and a movement of the attachment holder are moved to a predetermined position of a lift arm. And a distance actuator are provided outside the vehicle lift so as to be orthogonal to each other and movable,
Provided with an arithmetic circuit that can measure the distance from each sensor to a predetermined position of the vehicle, and can calculate the movement amount and turning angle of the lift arm based on the information input from the distance sensor based on the vehicle type storage information. , Outputs the calculation result of the calculation circuit to the swing actuator and the movement actuator, and after stopping the driving of both actuators,
It is characterized by enabling the lift cylinder to move up and down, automating a series of operations from adjustment of the jack point position to lift-up, and improving the efficiency and workability of this type of work.

(Embodiment) Hereinafter, an illustrated embodiment in which the present invention is applied to a separate lift will be described.
Is a lift cylinder that can be moved up and down in synchronism with each other on a floor surface 2 in an automobile maintenance facility via a synchronization means (not shown). Arm frames 3 and 3 are fixed to the top of the lift cylinder.

A pair of lift arms 4 and 4 are rotatably provided at both ends of the arm frames 3 and 3, and pivoting actuators 5 and 5 such as a servomotor are installed at the pivotal portions thereof.
The actuators 5 and 5 are driven by a control signal output from a drive control circuit to be described later, and the lift arms 4 and 5 are driven.
4 is rotated by each control angle, the control amount is detected by a potentiometer (not shown), and the signal is input to the drive control circuit.

At the bases of the lift arms 4 and 4, for example, moving actuators 6 and 6 such as hydraulic cylinders whose hydraulic oil is supplied and discharged by electromagnetic valves (not shown) are provided. The operating rods 7 and 7 are expanded and contracted by a predetermined amount by being driven by an output control signal. The expansion and contraction amount is detected by a potentiometer (not shown), and the signal is input to the drive control circuit. I am trying.

Attachment holders 8 and 8 are slidably fitted to the lift arms 4 and 4 at the tips of the operating rods 7 and 7, and jack points described below can be placed on the upper surfaces of the holders 8 and 8. Attachments 9, 9 are attached.

On the other hand, 10, 11, 12, and 13 are ultrasonic sensors as distance sensors, which are arranged laterally and laterally of the lift at right angles, and these are height positions according to the vehicle type of the maintenance vehicle 14 and the inspection position. Is manually adjustable. At the inspection position, first and second inspection locations 15 and 16 are provided in the length direction and the width direction of the vehicle 14, and in the embodiment, a bumper on the front of the maintenance vehicle 14 is used as the first inspection location 15. The ultrasonic sensors 10 and 11 are installed in the same row at a position h ₁ higher than the floor surface 2 of the bumper, and the distances L ₁ and L ₂ between the installation position and the two positions of the bumper are described above. Sensor 1
The measurement is made at 0 and 11.

Further, the body on the side of the maintenance vehicle 14 is designated as the second inspection point 16, and the ultrasonic sensors 12 and 13 are installed in the same row at a position h ₂ higher than the floor surface 2 of the body, Distances L ₃ and L ₄ between the installation position and two positions of the body
Is measured by the sensors 12 and 13.

In this case, the first and second inspection locations 15 and 16 may be any location that can be a reference or a reference for calculating a jack point position, which will be described later. Therefore, the location is a specification according to the vehicle type and model of the maintenance vehicle 14. According to this, the specific test position is also selected according to this, and the installation positions of the sensors 10, 11, 12, 13 are adjusted accordingly.

The sensors 10, 11, 12, and 13 are the position measuring circuit 1
7 which receives the distance signals in the circuit 17 and transmits them to the arithmetic circuit 18, which circuit 18
In addition to calculating the stop position of the maintenance vehicle 14, the distances d ₁ , d ₂ , from the turning center of each lift arm 4, 4 to the corresponding jack point 19, 20, 21, 22.
It is configured to calculate d ₃ , d ₄ and the amount of movement, and the turning angles θ ₁ , θ ₂ , θ ₃ , θ ₄ of the arms 4, 4.

Therefore, in the arithmetic circuit 18, based on the stop position of the maintenance vehicle 14, the relative positions of the jack points 19, 20, 21, 22 corresponding to each lift arm 4, that is, the pivot points P ₁ , P _{2 of} each lift arm 4. , _P 3, the horizontal and the arithmetic expression for calculating the perpendicular distance _{l h1 ~l h4, l v1 ~l} v4, the pivot point based on the distance to the jack points 19, 20, 21, 22 corresponding to the _{P 4} P ₁ , P ₂ , P ₃ ,
Corresponding jack points 19, 20, 21, from P ₄
Distances d _{1 to} d ₄ to 22 and each movement actuator 6
Amount of movement of the lift arm 4 and the swing angles θ _{1 to} θ of the lift arms 4
₄ is stored.

A vehicle type storage device 23 is connected to the arithmetic circuit 18,
In the device 23, the inspection points 15 and 16 and the inspection position, and the reference distance L from the first or second inspection points 15 and 16 to the jack point 19 depending on the vehicle type and model of the maintenance vehicle type
₅ , L ₆ , and jack points 19, 20, 21,
The horizontal and vertical distances L ₇ and L ₈ between 22 are stored, and these pieces of information are used to calculate the horizontal and vertical distances.

Then, the calculated movement amount of each lift arm 4 is output to the arm movement control unit 24a of the arm position setting circuit 24,
In addition, the turning amount of each lift arm 4 is set to the arm position setting circuit 2
It outputs to the arm rotation control unit 24b of No. 4 and sends a control signal to the moving and turning actuators 5 and 6 of each lift arm 4 via the drive control circuit 25 to drive them.

On the other hand, the turning angle and expansion / contraction amount of the lift arm 4 due to the drive of the actuators 5 and 6 are detected by a potentiometer (not shown), and the detection signal is input to the drive control circuit 25 and compared with the control amount. When the predetermined control amount is reached, the driving of the actuators 5 and 6 is stopped, and all the actuators 5 and 6 are driven.
The hydraulic device (not shown) for raising and lowering the lift cylinders 1 and 1 is driven when the driving of the above is stopped.

(Operation) As shown in FIG. 1, the control device configured as described above always has the lift cylinders 1 and 1 placed at the lowest position on the floor surface 2 and each pair of lift arms provided on the top thereof. 4,4
However, they are mutually flat in the reduced state.

Next, when automatically controlling the lift-up of the vehicle using this control device, the power of the control device is turned on and the control operation is put on standby, while the vehicle type of the maintenance vehicle 14 and Test location specified by model number 15,
16 and the information of the position to be inspected, the ultrasonic sensor 10,
The height positions h ₁ and h _{2 of} 11, 12, and 13 and their intervals are adjusted and placed. In this case, these adjustment amounts are input to the arithmetic circuit 18 and used in the later-described arithmetic process.

Under such circumstances, the maintenance vehicle 14 is made to enter between the opposing lift arms 4 and 4, and when the vehicle 14 is stopped, the position measuring circuit 17 is started to measure the stop position of the maintenance vehicle 14. That is, at the time of this measurement, the ultrasonic sensors 10, 11, 12, and 13 are used to detect the test points 15 and 1 respectively.
Ultrasound is emitted towards 6, measuring the distance between them.

Of these, the ultrasonic sensors 10 and 11 are the first test points 15
The ultrasonic sensors 12 and 13 are fired toward two positions on the side of the body, which is the second inspection point 16, while being fired toward two positions of the bumper, which measure the distances L ₁ and L _2. And measure their distances L ₃ and L ₄ . Such measurement results are input to the position measuring circuit 17, and these are transmitted to the arithmetic circuit 18.

The calculation circuit 18 includes ultrasonic sensors 10, 11 and 12,
The distance between the two is stored, and the dimensions between the height direction of the bumper and the side portion of the body and the two axes of the propagation direction of the sound wave and the coaxial direction are stored. Based on these and the measured values L _{1 to} L ₄ , the maintenance vehicle 14 is stored. The deviation angle θ with respect to the central axis at the stop position with respect to the lift, for example, the stop position of the vehicle 14 is calculated.

Then, with the argument θ as a parameter, L _{1 to} L ₄ and the jack points 19 stored in the arithmetic circuit 18,
Based on the relationship position _L 5 ~L ₈ of 20, 21, 22, horizontal and vertical distance l between the pivot point _P 1 to P ₄ of the lift arm 4 corresponding to each jack point 19, 20, 21, 22 _{h1 to} l _h4 , l _{v1 to} l _v4 are calculated, and each jack point 19, 20, 2 is calculated based on these calculation results.
Distances d _{1 to} d between the _{first and the second} pivots 22 and the pivot points P _{1 to} P _4
4 and the movement amounts of the respective movement actuators 6 are calculated, and further the turning angles θ _{1 to} θ ₄ of the turning actuator 5 are calculated.

The calculated value thus obtained is output as a drive signal to the arm movement control unit 24a and the arm rotation control unit 24b of the arm position setting circuit 24, and these are passed through the drive control circuit 25 and the movement actuator 6 of each lift arm 4. It is output to the turning actuator 5.

As a result, the moving actuator 6 is driven via the solenoid valve, the operating rod 7 projects by the control amount, and the attachment holder 8 fixed to the tip of the operating rod 7 moves along the lift arm 4 and the swing actuator 5 moves. Is driven to rotate each lift arm 4 by the control amount.

During this time, the potentiometers are operated in accordance with the driving of the actuators 5 and 6, and the movement amount and the turning angle of each lift arm 4 are detected one by one, and the signal is output to the drive control circuit 2.
Enter in 5. The control circuit 25 receives the input signals, compares them with the movement amount of each lift arm 4 which is a control amount, and the turning angle, and when they reach the same level, stops driving the corresponding actuators 5, 6. Let

In this way, the drive of each actuator 5, 6 is stopped, so that the attachment 9 of each lift arm 4 causes the corresponding jack points 19, 20, 2 of the maintenance vehicle 14 to move.
When positioned just below 1, 2, 22, a lifting pressure device (not shown) for the lift cylinders 1, 1 is driven to raise the cylinders 1, 1, and jack points 19, 20, 21, on the attachments 9, respectively. 22 is mounted and maintenance vehicle 1
Lift up 4.

As described above, in the present invention, the movement amount and the turning angle are automatically set for each lift arm 4 by detecting the stop position of the maintenance vehicle 14, and a series of steps from the adjusting operation to the lift-up are manually performed. Since no operation or confirmation is required, the workability and efficiency of this type of conventional work can be improved all at once, and productivity can be improved.

In this way, a predetermined maintenance and inspection work is performed after the maintenance vehicle 14 is lifted up, and after the work is completed, the operator operates the lifting / lowering pressure devices of the lift cylinders 1 and 1 to lift down the maintenance vehicle 14.

(Effect of the Invention) As described above, the automatic control device for a vehicle lift according to the present invention is as follows.
While a swing actuator for the arm and a movement actuator for the attachment holder are provided at predetermined positions of the lift arm, distance sensors are arranged outside the vehicle lift so as to be orthogonal to each other and movable, and each sensor provides a predetermined position for the vehicle. A calculation circuit capable of calculating the distance to the vehicle and calculating the amount of movement of the lift arm and the turning angle on the basis of the input information from the distance sensor based on the vehicle type storage information, and the calculation result of the calculation circuit Is output to the swing actuator and the movement actuator, and after the drive of both actuators is stopped, the lift cylinder can be moved up and down, so a series of operations from adjustment of the jack point position to lift up is automated. The efficiency and workability of seed work can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a control system of the present invention, showing a situation immediately after a maintenance vehicle is stopped, and FIG. 2 is an explanatory view showing a detection situation of a stop position of the maintenance vehicle by each ultrasonic sensor, Three
FIGS. 4 and 5 are explanatory views of the detection status of the stop position as seen from the side and the rear of the maintenance vehicle, FIG. 5 is an explanatory view showing the calculation contents of each lift arm, and FIG. 6 is each lift arm control. It is a top view showing the situation after. 4 ... Lift arm, 5 ... Rotating actuator, 6 ... Moving actuator, 9 ... Attachment, 10, 11, 12, 13 ... Ultrasonic sensor, 14 ... Maintenance vehicle, 15, 16 ... Inspected site, 19, 20, 21,22 ... jack points

Claims (1)

[Scope of utility model registration request] 1. A pair of lift arms is rotatably provided on an upper end of a lift cylinder that can be raised and lowered, an attachment holder is movably provided along the lift arms, and a jack-up point of a vehicle can be placed on the holder. A vehicle lift having an attachment, wherein a swing actuator of the arm and a movement actuator of the attachment holder are provided at a predetermined position of the lift arm,
Distance sensors are arranged outside the vehicle lift so as to be orthogonal to each other and movable, and the distance from each sensor to a predetermined position of the vehicle can be measured. , A calculation circuit capable of calculating the movement amount of the lift arm and the swing angle is provided, and the calculation result of the calculation circuit is output to the swing actuator and the movement actuator. An automatic control device for a vehicle lift, which is capable of raising and lowering.