JP2627412B2 - Lifting equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift device for setting a carrier or the like of an automobile to a lift state with respect to a body frame or the like.

2. Description of the Related Art There has been proposed a technique in which a pedestal or the like disposed above a base is placed in a lift state with respect to the base. For example, a cross-link type lift device in which an operation room containing a prime mover is provided on the rear side of a chassis equipped with a scanning device, and a main link and a sub-link are connected and supported by a pivot shaft so as to be rotatable relative to each other on the front side. A mobile trolley equipped with a loading platform that rises and descends substantially horizontally
No. has been proposed.

In this apparatus, the pivot is provided at a position appropriately away from the center in the longitudinal direction of the two links so that the carrier can be appropriately moved toward the operation room when the carrier is lifted. At the time of ascending, the loading platform moves closer to the operation room by the distance H with respect to the lowest descending position, whereby the center of gravity before and after the loading platform is corrected to the operation room side, thereby obtaining an advantageous effect.

Apart from this, vehicles generally have a restriction on the overall length of the vehicle body. In particular, there is a demand for a light four-wheel vehicle to have a cargo bed as long as possible within the restriction dimensions due to the small overall length of the restriction. In order to realize this, if the gap between the operator's cab and the bed is reduced during storage of the bed, the dimensions of the bed can be certainly increased. However, on the rear side of the driver's cab, a frame for protecting the rear glass and the like protrudes, so if the carrier is lifted vertically upward from the position at the time of storage, the carrier interferes with the frame material and the like. There is a drawback that it will.

SUMMARY OF THE INVENTION An object of the present invention is to lift a carrier or the like with respect to a body frame or the like to a lift state, and the carrier slightly moves in a direction away from a cab as the carrier rises. Then, the lift can be raised and lowered without interfering with the frame material or the like protruding from the rear surface of the cab. An object of the present invention is to provide a lift device which can be used effectively and has a simple configuration.

Means for Solving the Problems A lift device according to the present invention is disposed on a body frame behind a driver's cab of a vehicle, wherein a lower derivative disposed on the body frame and the lower derivative are provided. An upper derivative movably provided between the first derivative, a first and a second support disposed between the strain derivative and the upper derivative, and a moving device for moving the upper derivative relative to the lower derivative. Wherein the rollers rotatably provided at one ends of the first and second supports are movably engaged along the lower guide and the upper guide, respectively, and the first and second supports are provided. The vicinity of each longitudinal center of the body is rotatably connected via a connection shaft, and the other end of the first support is rotatably supported on the upper dielectric via a first support shaft. The other end of the second support is connected to the lower derivative. Second
In order to solve the above-mentioned problem, in order to solve the above problem, in order to solve the above problem, when the upper derivative is raised, the upper derivative is moved backward in a direction away from the cab. A first distance between the roller and the connecting shaft, a second distance between the connecting shaft and the first and second support shafts, in the first and second supports; Are different from each other.

An actuation device for moving an upper derivative movably provided with respect to a lower derivative is operated, and a first support shaft rotatably supporting the other end of the first support to the upper derivative is used as an axis. At the same time, the first support pivotally rotates about the second support shaft rotatably supporting the other end of the second support to the lower guide, and movably engages the lower guide and the upper guide. And a roller rotatably provided at one end of the second support moves along the lower derivative and the upper derivative, and the first and second supports disposed between the lower derivative and the upper derivative are: The upper derivative moves upward while maintaining a parallel state with respect to the lower derivative, while simultaneously moving in an intersecting manner around a connection shaft rotatably connected in the vicinity of the center in the longitudinal direction. Accordingly, the first distance between the roller and the connection shaft and the connection The upper derivative is moved backward with respect to the lower derivative in accordance with the difference between the second derivative and the second distance between the first and second spindles, so that the upper derivative is attached to the upper derivative during the lift. The pallet moves slightly away from the cab.

Examples Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a truck equipped with a lift device of the present invention. An operator's cab 1a is provided at the front of the truck 1, and a carrier 3 is provided on the body frame 2 behind the operator's cab 1a so as to be able to ascend in a parallel state.

As shown in FIGS. 2 and 3, two lower guide rails 4 serving as a lower derivative are provided on the body frame 2 in parallel at a distance from each other.
4 are provided with hollow grooves 5,5, respectively, and two upper guide rails 6,6 which are movable upper guide rails with respect to the lower guide rail 4 are formed on the lower surface of the loading platform 3 in parallel with each other at intervals. 4 (see FIG. 4), hollow grooves 7, 7 are respectively formed in the upper guide rails 6, 6, and the lower guide rails 4, 4 are formed.
Upper guide rails 6, 6 are respectively arranged inside the.

Both ends of an end fixing rod 8 are integrally fixed to the lower rear end, which is the other end of the lower guide rails 4, respectively, and both ends of a connecting rod 9 are located near the longitudinal center of the lower guide rails 4, 4. Support protruding plates 10, 10 are integrally provided, and are integrally provided near the center of the connecting rod 9 so as to protrude toward the front end.

A first support comprising two external supports 11, 11 between the lower guide rail 4 and the upper guide rail 6,
A second support composed of two internal supports 12, 12 is provided, respectively. The lower guide rail 4 is rotatably connected to an end of a hydraulic cylinder 13 serving as a moving device for moving the upper guide rail 6 upward in parallel with the lower guide rail 4, and a piston of the hydraulic cylinder 13. The tip of the rod 14 is rotatably connected to the internal support 12.

An outer support 11 is arranged outside the upper guide rail 6, and two inner supports 12, inside the upper guide rail 6, 6.
12 are arranged in parallel with each other at intervals (see FIG. 6). As shown in FIG. 2, both ends of the connecting rod 15 are integrally fixed to the upper portions of the internal supports 12, 12 near the front ends. .

On the outside of the front end, which is one end of the external support 11, an engagement roller 16 is provided.
Is rotatably supported, an engaging roller 17 is rotatably supported outside the front end which is one end of the internal support 12, and the engaging roller 16 of the external support 11 is hollow in the lower guide rail 4. The engagement roller 17 of the inner support 12 is movably engaged with the hollow groove 7 of the upper guide rail 6. The rear end, which is the other end of the external support 11, is rotatably supported by the rear end of the upper guide rail 6, and the rear end, which is the other end of the internal support 12, is rotated by the rear end of the lower guide rail 4. The outer support 11 and the inner support 12 are rotatably connected via a connection shaft 18 near the center in the longitudinal direction.

As shown in FIG. 4, side support plates 19, 19 protruding downward are integrally provided on both side surfaces of the rear end of the upper guide rail 6, respectively. 6 is rotatably mounted on side support plates 19, 19 at the rear end through a first support shaft composed of a support shaft 20.
The rear end fixing rod 8 projects upward to support plates 21, 21.
2 and 6, the rear end of the internal support 12 is supported by a support plate 2 provided on the end fixing rod 8 as shown in FIGS.
1, 21 are rotatably mounted via a second support shaft including a support shaft 22.

As shown in FIG. 2, the base end of the fluid pressure cylinder 13 is attached to support projection plates 10, 10 formed on the connecting rod 9 by a support shaft 23.
The piston rod 14 of the fluid pressure cylinder 13 is connected to the connecting rod of the internal support 12 while being rotatably mounted via
15 is rotatably mounted via an engagement shaft 24.

The external support 11 is provided between the engagement roller 16 and the connecting shaft 18 in the first direction.
And the second distance L2 between the connecting shaft 18 and the support shaft 20 is different, and the inner support 12 is
The first distance L1 is larger than the second distance L2 such that the first distance L1 between the first distance L1 and the second distance L2 between the connecting shaft 18 and the support shaft 22 is different.

As shown in FIG. 2, a connecting shaft 18 rotatably connecting the center in the longitudinal direction of the outer support 11 and the center in the longitudinal direction of the inner support 12 is connected to the outer support 11 and the inner support 12. Are disposed closer to the lower surface.

Further, the support shaft 20 that supports the other end of the external support 11 is disposed near the lower surface of the external support 11 similarly to the connection shaft 18, and the engagement roller 16 provided at one end of the external support 11 is It is arranged near the upper surface of the external support 11.

Further, as shown in FIG. 2, a support shaft 22 for supporting the other end of the internal support 12 is disposed near the lower surface of the internal support 12 similarly to the connection shaft 18, and as shown in FIG. , Support plate 21
And the lower surface of the support shaft 22 is disposed so as to be lower than the lower surface of the lower guide rail 4. The engagement roller 17 provided at one end of the internal support 12 is located near the upper surface of the internal support 12. Are located.

 Next, the operation of this embodiment will be described.

When the carrier 3 is to be lifted, use a hydraulic cylinder
13 is supplied with fluid pressure by a fluid pressure supply device (not shown). When the fluid pressure is supplied to the fluid pressure cylinder 13, the piston rod 14 of the fluid pressure cylinder 13 projects, and the piston rod 14
As a result of pushing up one end of the internal support 12 upward through the connecting rod 15 and the engagement shaft 24 connected to the tip of the internal support 12, the internal support 12 rotates about the support shaft 22 at the other end, The engagement roller 17 of the internal support 12 is provided with the hollow groove 7 of the upper guide rail 6.
Along with the rear end, and at the same time, the center of the external support 11 is pulled upward through the connecting shaft 18, so that the external support 11 rotates about the support shaft 20 at the other end. ,
The engaging roller 16 of the outer support 11 moves rearward along the hollow groove 5 of the lower guide rail 4, and the outer support 11 and the inner support 12 intersect about the connecting shaft 18 and form an X-shape. Thus, the upper guide rail 6 moves upward in a parallel state with respect to the lower guide rail 4 via the external support 11 and the internal support 12.

At the same time, as the upper guide rail 6 rises, the first distance L1 between the engaging rollers 16 and 17 of the supports 11 and 12 and the connecting shaft 18 is set between the connecting shaft 18 and the supporting shafts 20 and 22. The upper guide rails 6, 6 move rearward with respect to the lower guide rails 5, 5, corresponding to the difference that is longer than the second distance L2 between them.

As a result, the loading platform 3 mounted above the upper guide rail 4 rises upward in a state parallel to the lower guide rail 4 mounted on the body frame 2, and the loading platform 3 is moved with the lifting of the loading platform 3. Slightly moves in a direction away from the operator's cab 1a, avoids interference with a frame member or the like protruding from the rear surface of the operator's cab 1a, avoids the interference, and raises the carrier 3 to a lift state (see FIG. 2). At this time, the carrier 3 moves backward by a distance ΔL shown in FIG.

After the lifting operation, if the fluid pressure is removed from the fluid pressure cylinder 13 by an operation button (not shown), the piston rod 14 of the fluid pressure cylinder 13 retreats due to its own weight of the carrier 3, and the engagement roller 16 of the external support 11 Lower guide rail 4
Along the hollow groove 5, the engaging roller 17 of the internal support 12 moves along the hollow groove 5 of the upper guide rail 6.
The outer support 11 and the inner support 12 move the upper guide rail 6 downward in a state of being parallel to the lower guide rail 4 along the front end direction. Guide rail 6 is lower guide rail 4
To the front side, and eventually, as shown in FIG.
Take the lowest position of the lift.

Thereby, the carrier 3 mounted above the upper guide rail 4 descends in a state parallel to the lower guide rail 4 mounted on the body frame 2, and the carrier 3 operates as the carrier 3 descends. The carriage gradually moves in a direction approaching the cabin 1a, and moves downward without interfering with a frame member or the like protruding from the rear surface of the cab 1a, and returns to the initial position (see FIG. 5).

At the end of the lift operation, that is, at the lowest position of the lift, as shown in FIG. 6, the internal supports 12, 12 are respectively adjacent to the inside of the upper guide rails 6, 6 in parallel, and the upper guide rails 6, 6 External support between the lower guide rails 4 and 4
The fluid pressure cylinder 13 is located between the internal supports 12 and 12 as shown in FIG. 2 and the upper surface of the lower guide rails 4 and 4 as shown in FIG. , External support 1
The upper surface of the upper and lower guide rails 6, 11 and the upper surfaces of the upper guide rails 6, 6 and the upper surfaces of the inner supports 12, 12 are in the same horizontal plane, and the minimum height of the lift is lower than the upper surface of the lower guide rails 4, 4. Become. As shown in FIGS. 5 and 6, the upper guide rail
The loading platform 3 attached to the upper surfaces of 6, 6 is placed horizontally on the lower guide rail 4 attached to the vehicle body frame 2.

Effect of the Invention According to the lift device of the present invention, the loading platform and the like can be raised in a state parallel to the body frame and the like, and when the upper derivative is raised, the upper derivative is moved backward in a direction away from the cab. If the first distance between the roller and the connecting shaft in the first and second supports is different from the second distance between the connecting shaft and the first and second supporting shafts, As a result, when the loading platform is lifted relative to the body frame, the loading platform slightly moves rearward with respect to the body frame as the loading platform rises with respect to the body frame, so that the loading platform is moved out of the cab. Move slightly in the direction of separation,
For this reason, the platform can be raised and lowered without interfering with the frame material or the like protruding from the rear surface of the operator cab. It can be used effectively because it can be taken, and the configuration is simple and sufficiently implemented.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a truck equipped with a lift device according to an embodiment of the present invention. FIG. 2 is a front view showing a lift state when an upper guide rail rises with respect to the lower guide rail. Is a right side view of the lower guide rail, FIG. 4 is a right side view of the upper guide rail, FIG. 5 is a front view of the lower guide rail when the upper guide rail is lowered, FIG. 6 is a view of FIG. It is a right side view. 1 ... truck car, 2 ... body frame, 3 ... carrier,
4 lower guide rail, 5 hollow groove, 6 upper guide rail, 7 hollow groove, 8 end fixing rod, 9
Connecting rod, 10 ... Support protruding plate, 11 ... External support, 12 ...
Internal support, 13 ... Fluid pressure cylinder, 14 ... Piston rod, 15 ... Connection rod, 16 ... Engagement roller, 17 ... Engagement roller, 18 ... Connection shaft, 19 ... Side support plate , 20 ... support shaft, 21 ... support plate, 22 ... support shaft, 23 ... support shaft, 24 ...
Engagement shaft.

Claims (1)

(57) [Claims] 1. A lower derivative disposed on a body frame behind a driver's cab of a vehicle, and a lower derivative disposed on the body frame and an upper derivative movably provided with respect to the lower derivative. A first and a second support disposed between the lower derivative and the upper derivative; and a moving device for moving the upper derivative with respect to the lower derivative, the first and second supports being provided. Each of the rollers rotatably provided at one end of each of the first and second rollers is movably engaged along the lower guide and the upper guide, respectively.
Around the center of each support in the longitudinal direction is rotatably connected via a connection shaft, and the other end of the first support is rotatably connected to the upper dielectric via a first support shaft. Support the second
A lift device rotatably supporting the other end of the support member to the lower derivative via a second support shaft, wherein the upper derivative retreats in a direction away from the cab when the upper derivative rises. In order to move, the first and second
Wherein the first distance between the roller and the connecting shaft is different from the second distance between the connecting shaft and the first and second support shafts. A lift device characterized by the above-mentioned.