JPH11199187A - Lifting device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting device for a vehicle, which can bring the vehicle up to an appropriate height at the time of maintenance or the like. SOLUTION: This device can move a vehicle rested over an elevation table 20 up and down to a desired height by moving the operating stem of a cylinder 10, its one end is rotatably pivoted to the elevation table 20 side so as to be vertically erected when the elevation table 20 is supported at its upper end, and the device comprises supporting legs 30, rotating wheels 40, a detection sensor, and each pressing means assembled therewith wherein the supporting legs 30 are obliquely provided in the horizontal direction, and can be rocked when the elevation table 20 is lowered so as to be housed in, the rotating wheels 40 are rotatably mounted to the free end sides at the lower ends of the supporting legs 30, and are rotationally brought into contact with the bottom surface of a pit 100 when the supporting legs 30 are rocked, the detection sensor detects the elevated height of the operating stem of the cylinder 10, and each pressing means presses a part of each supporting leg 30 at the time of vertical erection in order to release its vertically erected ondition, and this constitution thereby enables the elevation table 20 to be safely moved upward, and secured thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lift device for lifting a vehicle to an appropriate height during maintenance of the vehicle.

Various types of such vehicle lift devices have already been proposed. For example, as a general type, a link type in which a frame portion rises obliquely, and a lift table having a long length are used. There is a two-cylinder vertical type which is composed of a pair of long table plates and vertically moved up and down by one cylinder (two in total, left and right) fixed below the bottom of the center of each table plate.

[0003]

However, the above-mentioned link type has a large number of movable parts of the frame, and when washing the lifted vehicle, mud or sand easily adheres to the gaps between the movable parts. There were problems such as being limited.

On the other hand, in the case of the two-cylinder lifting type, the seal of the operating rod (ram) portion of the cylinder is processed well, and there is no problem with car washing, etc. There is a drawback that the vehicle is susceptible to unbalanced load.

Also, there is a problem that it is difficult to cope with a vehicle such as a large truck due to the length of the table.

The present invention has been made in view of such a conventional situation, and does not provide a vehicle lift device which can easily cope with an eccentric load of a vehicle even with a cylinder elevating type. It is assumed that.

[0007]

According to a first aspect of the present invention, there is provided a vehicle lift apparatus for moving a vehicle mounted on an elevating table up and down to a desired height by raising and lowering an operating rod of a cylinder. A swingable support leg, one end of which is rotatably mounted on the lift table side and which stands up when supporting the upper end of the lift table, and which is inclined substantially horizontally when the lift table is lowered and stored; A rotating wheel that is pivotally mounted on the lower free end side of the support leg and is in rolling contact with the bottom of the pit when the support leg swings, a detection sensor for detecting a rising height of an operating rod of the cylinder, A lifting device for a vehicle, characterized in that it incorporates a pressing means for pressing a part of the support leg at the time of standing to release the standing state.

According to a second aspect of the present invention, there is provided a vehicle lift apparatus for moving a vehicle mounted on a lifting table up and down to a desired height by raising and lowering a cylinder operating rod. A pair of long table plates extending in the front and rear directions are configured in parallel, and the operating rod of the cylinder is connected to two places before and after the pair of table plates. A swingable support leg which is rotatably mounted on the shaft and stands upright when supporting the upper end of the elevating table, and which is tilted substantially horizontally when the elevating table is retracted; A rotating wheel that is pivotally mounted on the end side and is in rolling contact with the pit bottom surface when the support leg swings, a detection sensor for detecting a rising height of an operating rod of the cylinder, In a vehicle lift apparatus characterized by incorporating a pressing means for partially pressing the to release the upright position by the support legs.

According to a third aspect of the present invention, there is provided a front bottom portion or a front side of a large vehicle on one side of an elevating table formed of a pair of long table plates extending in the front-rear direction of the vehicle. 3. The vehicle lift device according to claim 2, further comprising an auxiliary lift on which the side wheel is mounted.

[0010]

1 to 7 show an example of a vehicle lift device according to the present invention. In the drawing, 10 is a cylinder, 20 is an elevating table on which the vehicle is loaded and mounted, and 30 is a support that swings (rotates) between an upright state and an almost horizontal oblique storage state as the elevating table 20 moves up and down. leg,
Reference numeral 40 denotes a support leg 3 which is pivotally mounted on the lower free end side of the support leg 30.
A rotating wheel that is brought into contact with the bottom of the pit at the time of swinging 0, a detection sensor 50 for detecting the elevation height of the operating rod 10a of the cylinder 10, and a 60 that presses a part of the support leg 30 when standing. The pressing means 70 for releasing the standing state of the lever is appropriately separated in the longitudinal direction of the elevating table 20 (front).
An auxiliary lift 80 installed on the side is a storage link such as an air pipe or a control cable pipe which is attached to the bottom side of the elevating table 20 and is bendable by elevating the elevating table 20.

The elevating table 20 has a pair of long table plates 21 and 21 extending in front and rear of the mounted vehicle, which are installed in parallel, and adopts a so-called drive-on-lift type in which the mounted vehicle can be carried in with wheels. On the other hand, the operating rod 10a of the cylinder 10 is fixed to two places before and after each of the pair of table plates 21 and 21, as is clear from FIG. As shown in FIGS. 1 and 4, it is preferable to pivotally pivot the baffle plate pieces 22, 22 at the front and rear ends of the table plates 21, 21 as necessary.

There are four cylinders 10 in total,
The main body of each of the cylinders 10 is vertically buried under the floor of a maintenance shop or the like, while the upper end thereof is substantially flush with the bottom surface in the pit 100 for storing the elevating table 20.

Specifically, as shown in FIGS. 4 to 7, the operating rod 10a of the cylinder 10 has four rectangular frame frames attached to the bottom frame 23 of each of the table plates 21 and 21. When the operating rod 10a is lowered to the lowermost end by being fixed through the body 24,
Each of the table plates 21 and 21 is stored in the pit 100, and the upper surface thereof is just on the floor surface 101 of a maintenance shop or the like.
And it has become almost flush. Here, as the cylinder 10 to be used, the operating rod 10a is a lifting table 2
A single-acting type that descends by its own weight together with the load on the zero side may be used, but a double-acting type that lowers the operating rod 10a by hydraulic pressure is preferable.

As is apparent from FIGS. 6 and 7, one end (upper end) of the support leg 30 is rotatable via a shaft pin 26 of a bearing member 25 attached to the frame 24. On the other side (lower end), a wheel 40
Is mounted on the shaft.

On the other hand, as shown in FIGS. 5 and 7, an encoder for detecting the amount of rotation of the shaft pin 26 is provided on the shaft pin 26 on which the support leg 30 is mounted. It is mounted as a detection sensor 50 for detecting the height, and on the frame 24 side, as shown in FIGS. A pressing means 60 such as an A / E cylinder for pressing is mounted.

Therefore, the operating rod 10 of the cylinder 10
When the lifting table 20 stored in the pit 100 rises due to the rise of a, the supporting legs 30 stored obliquely in the pit 100 in a substantially horizontal state also have their upper ends. When the elevating table 20 reaches the upper end supporting position when the elevating table 20 is lifted, the elevating table 20 is in an upright state. The standing state of the support leg 30 is detected by the detection sensor 50.

On the other hand, from this standing state, the cylinder 10
When the lifting table 20 is stored in the pit 100 by the lowering of the operating rod 10a, the air cylinder of the pressing means 60 is driven, and the operating rod 61 slightly presses the side surface of the support leg 30. Then, the support leg 30 is released from the standing state and enters the inclined storage state.
0 is stored in the pit 100 together with the lifting table 20.

The auxiliary lift 70 includes a cylinder 71 vertically buried under the floor of a maintenance shop or the like and an operating rod 71 thereof.
and an elevating table 72 fixed to the upper end of a.

In this embodiment, the lifting table 72 comprises a table plate for receiving the front bottom surface of a large vehicle as shown in FIGS. 1 and 2. A flat table plate of a drive-on-lift type can also be used.

According to the vehicle lift device of the present invention configured as described above, various types of vehicles can be handled as follows.

First, in the case of a large vehicle A such as a large truck shown in FIG.
The lift table 72 of 0 is also brought into the lift area when the lifted table 72 is almost flush with the floor surface of a maintenance shop or the like, and the lift table 72 of the auxiliary lift 70 is placed on the front bottom surface of the large vehicle A. And the wheels at the rear of the large vehicle A are
On the pair of table plates 21 and 21.

In this state, after fixing the large vehicle A,
The cylinders 10 of the book and the cylinder 71 of the auxiliary lift 70 are simultaneously driven to operate the respective operating rods 10a, 71a.
To rise. At this time, it is very important that the operating rods 10a of the four cylinders 10 on the main body side are raised at substantially the same speed, and the rising data is based on the swing rotation of the support legs 30 corresponding to each cylinder 10. The amount is detected by each detection sensor 50.

Here, if there is a difference in the amount of swinging rotation of each support leg 30 greater than a predetermined value, the elevating table 72 is tilted, which is dangerous. Since an excessive lateral load (a load displaced from the vertical ascending and descending direction) is likely to cause damage or a failure, the cylinders 10 and 71 are automatically stopped from rising. For these controls, for example, a controller built in a computer is used, the detection data from each detection sensor 50 is input to the controller, and a comparison with the above set values is performed by an internal control program, and each cylinder 10 and 71 is controlled. A stop signal may be issued to the user.

When the operating rod 10a of each cylinder 10 rises smoothly without any problem (within the range of the set value) and reaches a predetermined upper end support position, each support leg 30 is in an upright state, and the lifting table 20 As a kind of support rod, a function of preventing the lifting table 20 from falling can be realized, and great safety can be obtained. Of course, at this time, the cylinder 71 side of the auxiliary lift 70 is also raised in conjunction with the predetermined upper end support position.

The reaching of the support leg 30 to the standing state is detected by each detection sensor 50, and the raising of the operating rod 10a of each cylinder 10 is automatically stopped by the use of the above controller and the like.

In this state, the longitudinal center portions of the pair of table plates 21 and 21 of the elevating table 20 are
Since there is a space without obstacles, it can be used as a work area, and good workability can be obtained.

To lower the lifting table 20 from the upper end supporting position, the A-cylinder of the pressing means 60 corresponding to each cylinder 10 is driven to slightly press the side surface portion of each supporting leg 30 and After releasing the standing state, the cylinders 10 may be lowered. When the elevating table 20 is stored in the pit 100 by this lowering, the support legs 30 also enter an oblique storage state in conjunction with it and are stored in the pit 100 together with the elevating table 20. Of course, at this time, the cylinder 71 side of the auxiliary lift 70 is also lowered in conjunction with the predetermined lower end storage position.

As a result, since both the lifting table 20 and the lifting table 72 of the auxiliary lift 70 of the auxiliary lift 70 are substantially flush with the floor surface of a maintenance shop or the like, the large vehicle A such as a large truck is moved as it is. Just do it.

Next, in the case of a small vehicle B such as a small truck or a normal passenger car shown in FIG.
0 is not used at all, and the same operation as described above may be performed using only the elevating table 20 on the main body side.

As described above, when a difference in the amount of swing rotation of each support leg 30 exceeding a certain set value occurs, the elevation of each cylinder 10, 71 is temporarily stopped to prevent danger. However, at this time, since the height of each cylinder 10 is detected by each detection sensor 50,
A function to correct abnormally high or abnormally low ones,
For example, a correction drive switch or the like may be provided to balance the height of each cylinder 10. Or
The four cylinders 10 may be driven independently of each other, but the two cylinders before and after each of the table plates 21 and 21 or the two front and two rear cylinders may be driven in synchronization.

The detection sensor 50 is not limited to an encoder for detecting the rotation amount of the shaft pin 26, but may be a wire winding type encoder. Furthermore, in the above embodiment, four cylinders 10 were used as a preferable example. However, the present invention is not limited to this. As shown in FIGS. It is also possible to fix the width direction frames 27, 27 to the operating rod 10a, and to attach a pair of table plates 21, 21 of the lifting table 20 between the width direction frames 27, 27.

In this case, since the lengths (widths) of the width direction frames 27, 27 are not so large, the unbalanced load is so large as compared with the case where only the central portion of the table plates 21, 21 is supported by the cylinder 10. Does not occur.

[0033]

As is apparent from the above description, the vehicle lift device according to the present invention has the following excellent effects.

(1) First, since a swingable supporting leg, a rotating wheel, a detection sensor, and a pressing means are incorporated in a lifting table which is raised and lowered by an operating rod of a cylinder.
It is possible to easily cope with an uneven load of the vehicle and the like, and it is possible to safely lift and lower the lifting table. Of course, since the cylinder is of a vertical type, the car can be washed without worrying about adhesion of mud or sand as in the conventional link type.

(2) In particular, since the support legs are automatically switched between the upright state and the oblique storage state in conjunction with the elevating of the elevating table, there is no need for manual work. And extremely excellent convenience can be obtained.

(3) Since the height of the lifting table is constantly detected by the detection sensor, even if a plurality of (for example, four) cylinders are used, each cylinder can be driven stably. . Further, if the height of each cylinder is detected to have a difference equal to or more than a predetermined value due to the detection of the height, the ascent is automatically stopped once with the help of a controller built in the computer.
It is also possible to correct variations in the height of each cylinder by manual or automation.

(4) If an auxiliary lift is combined with the lifting table on the main body side, it is possible to sufficiently cope with large vehicles such as large trucks and buses. For a small vehicle such as a small truck or a normal passenger car, only the lifting table on the main body side can sufficiently cope with the small vehicle. Of course, if the length of the lifting table on the main body side is made relatively long, it is possible to cope with a large vehicle without using an auxiliary lift. That is, great versatility can be obtained with one device.

[Brief description of the drawings]

FIG. 1 is a side view showing the entirety of an example of a vehicle lift device according to the present invention.

FIG. 2 is a plan view of the vehicle lift device of FIG. 1 according to the present invention.

FIG. 3 is a rear view of the vehicle lift device of FIG. 1 as viewed from the rear.

FIG. 4 is a partially enlarged side view showing a lifting table, a cylinder, and support legs of the vehicle lift device of FIG. 1 according to the present invention;

FIG. 5 is a partially enlarged plan view showing one table plate of the lifting table of the vehicle lift device according to the present invention shown in FIG. 1;

FIG. 6 is a partially enlarged side view showing a supporting leg and a pressing means of the vehicle lift device according to the present invention of FIG. 1;

FIG. 7 is a partially enlarged plan view showing a supporting leg and a detection sensor of the vehicle lift device of FIG. 1 according to the present invention.

FIG. 8 is a plan view showing the entirety of another example of the vehicle lift device according to the present invention.

9 is a rear view of the vehicle lift device of FIG. 8 from the rear.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylinder 20 Elevating table 30 Support leg 40 Rotating wheel 50 Detection sensor 60 Pressing means 70 Auxiliary lift A Large vehicle B Small vehicle

Claims (3)

[Claims] 1. A vehicle lift device for moving a vehicle mounted on a lift table up and down to a desired height by raising and lowering a cylinder operating rod, one end of which is rotatably mounted on the lift table side. When the lifting table is supported at the upper end, the lifting table stands upright, and when the lifting table is lowered, the swinging support legs are inclined substantially in a horizontal direction. A rotating wheel that is brought into contact with the bottom of the pit when the support leg swings, a detection sensor for detecting the elevation height of the operating rod of the cylinder, and a part of the support leg when standing. And a pressing means for releasing the standing state of the vehicle. 2. A vehicle lift device for moving a vehicle mounted on a lifting table up and down to a desired height by raising and lowering an operating rod of a cylinder. A pair of table plates are configured in parallel, and an operating rod of the cylinder is connected to two front and rear portions of the pair of table plates, and one end is rotatably mounted on the lifting table side near each cylinder. When the lifting table is supported at the upper end, the lifting table stands upright, and when the lifting table is lowered, the swinging support legs are inclined obliquely in a substantially horizontal direction, and are pivotally mounted on the free ends below the support legs. A rotating wheel that is in contact with the bottom of the pit when the support leg swings, a detection sensor for detecting the height of the cylinder operating rod, and a part of the support leg when standing up. Vehicle lift apparatus characterized by incorporating a pressing means for releasing the upright position. 3. A front bottom portion or a front wheel of a large-sized vehicle is mounted on one side of a vertically movable table, which is composed of a pair of elongated table plates extending in the front-rear direction of the mounted vehicle, which is appropriately separated in the longitudinal direction. 3. The vehicle lift device according to claim 2, further comprising an auxiliary lift.