JP2003146594A - Vehicle lift device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe vehicle lift device in which a projection is not downwardly projected from a side position of a lift plate when the vehicle is lifted up and a maintenance work is carried out. SOLUTION: The vehicle lift device 1 is used in a vehicle maintenance factory or the like and is provided with a lifting lift plate 2; and an arm holder 3 disposed at the outside of the lift plate 2 and pivotally supporting a support arm 4 at a root part. For example, the lift plate 2 and the arm holder 3 are lifted from a pit provided on a floor surface. The pivotally supporting mechanism 5 for pivotally supporting the root part 4a comprises a cylindrical body 6 fixed to the root part of the support arm 4; and a support shaft 7 slidably supported in the cylindrical body 6 and inclinably connected to the arm holder 3 by a turning pin 8 at a lower end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lift of a type in which a lift plate moves up and down from a pit provided on a floor, for example, in a vehicle maintenance factory.

[0002]

2. Description of the Related Art A conventional lift device for a vehicle of this type is provided with a lift plate that moves up and down, and an arm holder that is arranged outside the lift plate and has a support arm pivotally supported at a root portion. The mechanism is configured by providing the supporting arm with a long hanging shaft, and by providing the arm holder with a bearing hole that fits with the hanging shaft.
It is known that the support arm is formed so as to be movable in the turning direction and the vertical direction.

[0003]

According to this conventional lift device, when the lift-up work is performed only by the lift plate without using the support arm, the long hanging shaft hanging from the root of the support arm works. It is annoying and dangerous to get caught in clothes or hit your head,
Also, when the bearing arm is swung and extended, the bearing arm is used to lift up, and after maintenance work, the bearing arm is returned to the storage position on the outer side of the lift plate and then lifted down, the bearing arm is returned to its original length. If it is forgotten to shorten it, there is a problem that the tip of the bearing arm hits a corner of the floor of the pit and the bearing arm is forcibly tilted to damage the hanging shaft and the like.

An object of the present invention is to provide a vehicle lift device that solves these problems.

[0005]

In order to achieve the above object, the present invention is for a vehicle provided with a lift plate that moves up and down, and an arm holder that is disposed outside the lift plate and that has a support arm supported at a root portion. In a lift device, a root portion of the support arm and the arm holder are connected and supported via a pivotal support mechanism, and the pivotal support mechanism includes a tubular body and a support shaft slidably supported in the tubular body. At the same time, it is pivotally supported by the arm holder in a lower portion of the pivot mechanism so as to be tiltable.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a vehicle lift device 1 according to one embodiment of the present invention.
Is a pair of left and right lift plates 2 which are installed in a pair of left and right pits provided on the floor so as to be able to move up and down from the pit
An arm holder 3 fixed to the outside of each lift plate 2, a pair of support arms 4 pivotally supported at the root of each arm holder 3, and a pivotal support for each support arm 4. It has a pivot mechanism 5 and is formed as a twin lift device.

Incidentally, in FIG. 1, the lower half portion thereof houses a lift plate 2, an arm holder 3, a support arm 4 having a shortened arm and a pivotal support mechanism 5 in a pit as in FIG. 5 described later. The state of accommodation is shown, and the upper half shows the state of use in which the support arm 4 is pulled up and swiveled and placed on the upper surface of the lift plate 2.

FIG. 2 is a partially cutaway front view of a part of the pivotal support mechanism 5, FIG. 3 is a sectional view taken along the line III--III of FIG. 4, and FIG. 4 is a bottom view of the pivotal support part. As shown in FIG. 3, it is formed of an iron plate having a substantially U-shaped cross section, and is fixed to the outside of the lift plate 2 at the upper end portion of one side plate portion thereof.

The pivotal support mechanism 5 includes a cylindrical body 6 fixed to the root of the support arm 4, a support shaft 7 inserted into the cylindrical body 6, and a rotation shaft inserted into the lower end of the support shaft 7. The rotating pin 8 is rotatably fitted and supported in the holes of a pair of projecting plates 3a projecting from the lower surface of the arm holder 3 at both ends thereof. The upper end portion is formed as a large-diameter annular bulge portion 7a, and the tubular body 6 is formed with an annular ridge portion 6a at the lower end portion of the inner peripheral surface thereof, and the support shaft 7 is formed by the ridge portion. The cylindrical body 6 is slidably contacted at 6a and can move upward together with the support arm 4 until its ridge 6a comes into contact with the bulging portion 7a, and the support arm 4 is horizontal about the support shaft 7. The tip of the support arm 4 is tiltable in the vertical direction about the pivot pin 8 while being rotatable in this state. .

The projection 6a and the bulging portion 7a constitute stopper means. Reference numeral 3b denotes an opening formed at the bottom of the arm holder 3 so that the pivot pin 8 can be tilted.

Next, the operation of the vehicle lift device 1 of this embodiment will be described.

The vehicle to be lifted up is stopped at the center of the pair of lift plates 2 shown in FIG. At this time,
As shown in the lower half of the figure, the arm holder 3, the support arm 4, and the pivotal support mechanism 5 are housed under the floor surface of the pit together with both lift plates 2, so that they do not interfere with the entry of the vehicle.

Next, when the vehicle is lifted up only by the lift plate 2 without using the support arm 4, the support arm 4 is shortened as shown in the lower half of FIG. 1 as shown in FIGS. 2 and 3. It is arranged along the outside of the lift plate 2. Thus, since the support arm 4 does not project above the upper surface of the lift plate 2, the lift-up work can be performed safely. After the work is completed, the supporting arm 4 is stored under the floor together with the lift plate 2 as shown in FIG.

When the vehicle is lifted up by using the support arm, the vehicle is advanced with the support arm 4 housed as shown in the lower half of FIG. 1 and then provided in the middle of the support arm 4. Holding the lifting ring 4a, the supporting arm 4 is lifted upward. At the time of this lifting, at the root portion of the supporting arm 4, the cylindrical body 6 slides on the support shaft 7 at its protruding portion 6a and the protruding portion 6a bulges out.
Moves up until it contacts a. In this upper moving position, the lower surface of the support arm 4 is located above the upper surface of the lift plate 2, so that the support arm 4 is extended and pivoted to the upper surface of the lift plate 2 as shown in the upper half of FIG. Therefore, the support fitting 4b provided at the tip of the support arm 4 is located near the support point of the vehicle.

At this time, the stop holes 2a are formed in the upper surface of the lift plate 2 at several positions around the root at a predetermined angle.
One of them is fitted with a stopper 4c provided on the support arm 4 to fix the turning angle position.

After that, the lift is lifted a little and the supporting arm 4 is expanded and contracted to bring the supporting metal fitting 4b into contact with the supporting point.

Thereafter, the lift is further raised to perform maintenance work in the lift-up state. Here, in the present embodiment, the support shaft 7 is positioned in the arm holder 3 and the cylindrical body 6 at the root of the support arm 4 moves up and down along with the support shaft 7 as the support arm 4 moves up and down. Therefore, it is safe because there is no long hanging shaft hanging from the root of the bearing arm as in the conventional case.

After the maintenance work, the support arm 4 is lifted down together with the lift plate 2 and the support arm 4 is housed outside the lift plate 2 in the reverse order of the above.

However, if the support arm 4 is lowered while forgetting to return it a little as shown on the left side of FIG. 6, the tip of the support arm 4 which has forgotten to return will hit the corner of the floor of the pit. Further, when further lowered, as shown in FIG. 7, the support arm 4 is tilted and accommodated with the tip part thereof protruding.

In this way, even if the support arm 4 is tilted by forgetting to return the tip end portion, the support shaft 7 of the pivot support mechanism 5 of the present invention.
Since the lower part of the shaft is supported by the rotating pin 8, the support shaft 7 can be tilted without damage, and repair of shaft damage can be dispensed with. If the tip is shortened to the initial position,
As shown in, it can be easily returned to the normal storage state.

With respect to the pivotal support mechanism 5, the support shaft 7 is fixed to the root end of the support arm 4, and the lower end portion of the cylindrical body 6 which slidably supports the support shaft 7 is provided with a rotating pin 8.
Alternatively, the arm holder 3 may be tiltably connected to the arm holder 3.

[0023]

As described above, according to the present invention, the work such as the conventional long hanging shaft does not exist, and there is nothing caught on the work clothes or the head of the worker during maintenance work, and the work is easy to perform. Moreover, even if the tip end of the bearing arm is forgotten to be lifted down and lifted down, the pivotally supported shaft tilts without being damaged. Therefore, repair of the shaft damage is unnecessary, and there is an effect of improving maintainability.

[Brief description of drawings]

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

FIG. 2 is a partially cutaway front view of a portion of the pivotal support mechanism.

FIG. 3 is a sectional view taken along the line III-III.

FIG. 4 is a bottom view thereof.

FIG. 5 is a cross-sectional view of a stored state.

FIG. 6 is a cross-sectional view during storage.

FIG. 7 is a cross-sectional view during storage.

[Explanation of symbols]

1 Vehicle lift device 2 lift plate 3 arm holder 4 bearing arm 5 pivot mechanism 6 tubular 7 Support shaft 8 rotating pins

Claims (3)

[Claims] 1. A lift device for a vehicle, comprising: a lift plate that moves up and down; and an arm holder that is disposed outside the lift plate and that supports a bearing arm at a root portion. The lift portion of the bearing arm and the arm holder are provided. It is connected and supported via a pivot mechanism, and the pivot mechanism comprises a tubular body and a support shaft slidably supported in the tubular body, and is tiltable to the arm holder at a lower portion of the pivot mechanism. A lift device for a vehicle, which is pivotally supported. 2. A stopper means for restricting the upward movement of the support arm when the support arm is moved upward from a storage position outside the lift plate and the lower surface of the support arm reaches above the upper surface of the lift plate. 2. The vehicle lift device according to claim 1, wherein is provided on the tubular body and the support shaft. 3. The stopper means comprises an annular protrusion provided on the inner peripheral surface of the tubular body and an annular bulge provided on the outer peripheral surface of the support shaft. 2. The vehicle lift device according to 2.