JPH0524596Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a vertical lift device for vehicles that is attached to the rear of a freight vehicle to load and unload cargo, etc., and is particularly used for waste collection, etc. The present invention relates to a vehicle vertical lift device having a structure suitable for installation on a roof-covered dump truck.

(Prior art) Conventionally, this type of vertical lift device, as shown in Utility Model Publication No. 55-5393, uses a runner with rollers installed in a guide post vertically attached to the rear of the loading platform so that it can be raised and lowered. In some cases, a lift plate (usually used as a tailgate) for cargo handling was attached to the runner. In this case, in order to raise and lower the elevating plate between the ground surface and the platform floor, a guide post with a length commensurate with the elevating stroke is required, which has the disadvantage that the guide post becomes too long.

Considering this point, in Japanese Patent Application Laid-Open No. 57-107930, the guide post is constructed with a double structure, that is, an inner post is slidably fitted inside the guide post, and the runner can be raised and lowered with respect to the inner post. A lift device has been proposed in which a lifting plate is attached to a runner. This double post structure can shorten the length of the guide post and solve the problem of the guide post protruding excessively from the loading platform and interfering with cargo handling.

(Problem to be solved by the invention) By the way, the vertical lift device for this type of vehicle generally has a structure in which the elevating plate is in an upright state during driving and is also used as a tailgate, but the conventional guide In a mechanism in which an inner post is provided on a post so as to be movable up and down, and a runner is provided on the inner post so as to be movable up and down, there are restrictions on the locking position of the elevating plate attached to the runner. In other words, the inner post is designed to be pulled up into the guide post in conjunction with the movement of the runner in the upward direction, but the inner post is completely retracted into the guide post only when the runner and elevating plate move into the guide post. On the other hand, when the lift reaches the upper limit position (usually the inner post is a little shorter than the guide post), the inner post protrudes from the guide post when the vehicle is running with the lift plate locked. In order to avoid this, the lock position of the elevating plate is limited to near the upper limit position with respect to the guide post.

Taking this into consideration, in the case of covered dump trucks used for waste collection, etc., there is a rear double door and a tailgate below that that can be opened when dumping, so in the conventional mechanism, the elevator plate is also used as the tailgate. It is not possible to do so, and the locking position of the elevating plate when not in use becomes a problem.

In view of the above points, the present invention has a structure that allows the elevator plate to be erected and locked in a low state with a runner located at the lower end of the guide post, and that also prevents the inner post from falling from the lower end of the guide post. It is an object of the present invention to provide a vertical lift device for a vehicle that can be attached to various vehicles including a roof dump truck.

(Means for Solving the Problems) The present invention provides an inner post that is movable up and down on a guide post that is vertically attached to the vehicle loading platform.
A runner is provided that can be raised and lowered with respect to the inner post, a lifting plate is attached to the runner so that it can be opened and closed from a horizontal state to a vertically closed state, and when the runner is raised, a member attached to the runner is moved to the inner post. In a configuration in which the inner post rises together with the runner and is pulled into the guide post by coming into contact with an attached member, the guide post has a central axis of rotation parallel to the vertical direction of the guide post. It has a lock plate rotatably attached to the outer surface and a stopper plate fixed to the lower end of the lock plate, and a locking part integrated with the lock plate is attached to the lifting plate side in the closed state. The guide post is characterized by comprising a locking mechanism in which the stopper plate closes at least a part of the lower opening of the guide post at a locked position of the locking part that can be engaged with the locking member. , thereby solving the problems of the prior art.

(Function) In the vehicle vertical lift device of the present invention, once the runner is raised to the vicinity of the upper limit position and the inner post is stored in the guide post, the lock plate of the lock mechanism and the locking part integrated therewith are By setting the inner post to the lock position where it can engage with the locking member on the elevating plate side, the stopper plate fixed to the lock plate closes the lower opening of the guide post, thereby preventing the inner post from falling later. Therefore, the runner can be lowered to the lower end position of the guide post, and the elevating plate can be erected at the lower elevating plate position where the runner is located at the lower end of the guide post to be in the closed state and locked. As a result, it can be installed in a variety of vehicles including roof dump trucks, and the elevator plate can be locked in a position where it does not interfere with opening and closing the rear door or gate on the vehicle side.

(Example) Hereinafter, an example of the vertical lift device for a vehicle according to the present invention will be described with reference to the drawings.

A first embodiment of the present invention will be explained with reference to FIGS. 1 to 5. In these figures, inner posts 2 are provided in guide posts 1 vertically fixed along the left and right ends of the rear end of a loading platform D, and inner posts 2 are provided so as to be movable up and down, respectively, and runners 3 are movable up and down with respect to the inner posts 2. It is provided. And between the two runners,
A lift plate 4 for cargo handling is attached. That is,
Brackets 6 are fixed to the lower ends of the plate-like parts 5 of each runner 3 appearing outside the inner post 2, and mounting arms 7 fixed to both sides of the lifting plate 4 are connected to both brackets 6 with pins 8, respectively. It is pivoted.

The elevating plate 4 has a folding structure and consists of an elevating plate main body portion 4A to which an attachment arm 7 is fixed, and an elevating plate extension portion 4B connected to the main body portion 4A via a hinge 9.

Further, a vertical partition 10 is formed inside the guide post 1 in order to guide the inner post 2 without rattling, and a bracket 11 is formed at the bottom of the guide post 1.
A roller 12 is pivotally mounted. Thereby, the inner post 2 is supported slidably in the vertical direction with respect to the guide post 1. A rectangular plate-shaped nylon resin sliding member 13 that slides inside the guide post 1 is attached to the upper part of the inner post 2 to prevent the inner post from rattling.

The runner 3 includes a plate portion 5 located on the outside of the guide post 1 and the inner post 2, and a vertical groove 14A of the guide post 1 (see the bottom view in FIG. 4).
and a plate-like part 5A which is adapted to move in the vertical groove of the inner post 2 and is perpendicular to the plate-like part 5, and both plate-like parts 5, 5A.
are integrated by welding or the like so that the cross section is T-shaped. A rectangular plate-shaped nylon resin sliding member 15 that slides on the inner surface of the inner post is attached to the upper position of the plate-like part 5A that moves up and down inside the inner post of the runner 3, and a sliding member 15 made of nylon resin that slides on the inner surface of the inner post is attached to the lower position. A contacting roller 16 is pivotally mounted.

A sheave 17 is pivotally supported at the upper part of the guide post 1, and a wire rope 18 with one end fixed to the upper end of the runner 3 is stretched over the sheave 17, and a connection connecting the guide posts 1 on both sides is provided. The sheave 19 is pivotally supported within the post 20 and is pulled by a driving force from a hydraulic cylinder within the connecting post.

2 to 4 show a locking mechanism 30 provided at the lower end of the guide post 1, and the locking mechanism 30 includes a lock plate 32 attached to the outer surface of the guide post 1 via a hinge 31; A stopper plate 33 is provided at the lower end of the lock plate 32, as shown in FIG. 4, which is fixed by welding or the like. The locking plate 32 has an integral hook part 34 as a locking part for locking the elevating plate at the upper part thereof, and has a rotation center axis C parallel to the vertical direction of the guide post 1. As shown in the bottom view of FIG. 4, the stopper plate 33 closes a part of the lower opening of the guide post 1 when the hook portion 34 is at the solid line position in the figure, and the inner post 2 closes the lower end of the guide post 1. It works to prevent it from falling further down. An extension spring (toggle spring) 37 is disposed between a pin 35 at the lower end of the lock plate 32 and a pin 36 fixed to the outer surface of the guide post, and the hook portion 34 is moved to the lock position (shown by the solid line in FIG. 4). Stopper plate 3
3 to prevent the inner post 2 from falling) or to the lock release position (release of the stopper plate 33) indicated by the imaginary line.

As shown in FIG. 3, the frame portion 4 of the elevating plate main body portion 4A
An L-shaped stopper 40 passes through 0A and serves as a locking member.
A compression spring 41 is disposed between the end of the stopper 40 and the inner surface of the frame. This spring 41
is for urging the stopper 40 in the retracting direction.

As shown in FIG. 1, a magnet 51 is attached to the inner lower part of the guide post 1 with a holder 50 so as to attract the inner post 2. This magnet 51 is connected to the locking mechanism 30.
When the hook part 34 is set to the imaginary line position in FIG. 4 and the lower end opening of the guide post 1 is partially unblocked by the stopper plate 33, the inner post 2 becomes free and prevents it from falling suddenly. The attraction force of the magnet 51 is set so that as the runner 3 descends, the inner post 2 also descends gently.

In the configuration of the first embodiment described above, the L-shaped stopper 40 in FIG. 2 is rotated in the direction of arrow P from the closed state in which the lifting plate 4 is vertically erected and folded as shown in FIGS. 2 to 4. Then, the lock mechanism 30 is disengaged from the hook part 34 by turning it upward, and the hook part 34 and the lock plate 32 integrated therewith are rotated in the direction of the arrow Q in the bottom view of FIG. As a result, the stopper plate 33 is removed from the lower end opening of the guide post 1, and the inner post 2 can be freely lowered from the lower end of the guide post 1. In this state, if the elevating plate 4 is opened horizontally (the elevating plate main body 4A and the extension part 4B are unfolded flat) and the wire rope 18 is let out by the hydraulic cylinder, the runner 3 and the elevating plate 4 will be moved by their own weight. The elevating plate 4 descends relative to the guide post 1 and inner post 2, and lands on the ground as shown in FIG. Further, as the wire rope 18 is wound up, the runner 3 and the elevating plate 4 rise relative to the inner post 2, and when the inner post 2 is completely raised, the runner 3 and the elevating plate 4 move together with the inner post 2 to the guide post. 1 and reaches the upper limit position shown in FIG. Carrying in and out of cargo and other objects is carried out using the lifting and lowering movement of the lifting plate 4 from the landing position to the upper limit position.

When locking the elevating plate 4, first set the elevating plate to the upper limit position as shown in FIG.
hits the sliding member 13 on the inner post side, so that the runner 3 pulls up the inner post 2), and then the hook portion 34 at the imaginary line position in FIG.
is rotated in the opposite direction to the arrow Q to partially close the lower opening of the guide post 1 with the stopper plate 33. As a result, the inner post 2 cannot be lowered from the lower end of the guide post 1. Then, run the runner 3 up to the lower end of the guide post 1 and inner post 2.
is lowered, and as shown in FIG.

FIGS. 6 to 8 show a structure in which the vehicle vertical lift device 60 of the first embodiment is mounted on a covered dump truck 70 used for waste collection or the like. In this case, the lifting plate 4 is at the upper limit position (7th position) shown in FIG.
When the virtual line R) in the figure appears, the ceiling dump truck 7
The height is slightly lower than the rear double door 71 of No. 0, and the goods on the elevator board 4 can be carried in by opening the double door 71.

Furthermore, when the lift plate 4 is folded and locked as shown in FIG. 2, the folded lift plate 4 is positioned below the tailgate 72 of the boxed dump truck 70, as shown in FIG. Carrying in and out of articles using the tailgate 72 and dumping operation (tilting) of the loading platform are not obstructed. This is due to the runner 3 as described in the explanation of the first embodiment.
This is because a mechanism is adopted in which the elevating plate 4 is folded and locked when it is at the lower end position of the guide post 1.

In the first embodiment, the elevating plate 4 has a folding structure consisting of the elevating plate main body portion 4A and the elevating plate extension portion 4B connected to the main body portion 4A via the hinge 9. , it can also be applied when using a single-plate lift plate that is not a folding structure. A vertical lift device for a vehicle using a single plate-shaped lifting plate will be described as a second embodiment with reference to FIGS. 9 and 10. In this case, instead of the L-shaped stopper 40, lock pins 75 with flat and wide heads are fixed to both sides of the single plate-shaped elevating plate 4C. Then, the lock mechanism 30 is locked at the lifting plate upper limit position as shown in FIG.
with the same positional relationship as the solid line in FIG.
As shown in the figure, lower the runner 3 to the lower end position of the guide post 1 and inner post 2, and then attach the hook part 34.
Insert the lock pin 75 into the hole. This completes the locking operation of the lifting plate 4C.

In this case, by raising the lifting plate 4C at the upper limit position and then lowering it, the lifting plate 4C can be automatically locked, making the locking operation easier.

Note that the other configurations and operations are the same as those of the first embodiment described above.

(Effects of the invention) As explained above, according to the vehicle vertical lift device of the present invention, the elevating plate can be erected and locked in a low state with the runner located at the lower end of the guide post, and the inner post can It is possible to have a structure that can prevent the guide post from falling from the lower end. As a result, there is an advantage that the lift plate can be mounted on various vehicles including roof dump trucks in which the lift plate cannot be used also as a tailgate.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of the first embodiment of the vertical lift device for a vehicle according to the present invention, with the elevating plate at the upper limit position; Fig. 2 is a side view with the elevating plate folded and locked; Figure 3 is a front view of the same, Figure 4 is a bottom view of the same, Figure 5 is a side sectional view of the elevating board in a state of landing, and Figure 6 is a side sectional view of the same.
The figure is a plan view of the vehicle vertical lift device of the first embodiment installed on a boxed dump truck, FIG. 7 is a side view of the same, FIG. 8 is a front view of the same, and FIG. 9 is a second embodiment of the present invention. FIG. 10 is a side sectional view of the embodiment in which the lifting plate is at its upper limit position, and FIG. 10 is a side view of the lifting plate in the locked state. 1...Guide post, 2...Inner post, 3...
Runner, 4... Elevating plate, 17... Sheave, 18... Wire rope, 30... Lock mechanism, 32... Lock plate, 33... Stopper plate, 34... Hook portion, 75...
Lock pin.

Claims (1)

[Scope of claim for utility model registration] An inner post is provided on a guide post vertically attached to the vehicle loading platform so that it can be raised and lowered, a runner is provided on the inner post so that it can be raised and lowered, and an elevator plate is installed on the runner from a horizontal state to a vertical position. When the runner rises, a member attached to the runner comes into contact with a member attached to the inner post, so that the inner post rises together with the runner and moves into the guide post. A vertical lift device for a vehicle, which is capable of lifting a vehicle up and down, includes a lock plate 32 rotatably attached to the outer surface of the guide post so as to have a center axis of rotation C parallel to the vertical direction of the guide post, and the lock plate 3.
and a stopper plate 33 fixed to the lower end of the lock plate 32, the locking part being integral with the lock plate 32 being able to engage with the locking member on the lifting plate side in the closed state. At the lock position of the stopper plate 33,
A vertical lift device for a vehicle, characterized in that the locking mechanism 30 is configured to close at least a portion of the lower opening of the guide post.