JP2595921Y2 - Work vehicle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle such as an aerial work vehicle or a crane vehicle, and more particularly, to a work vehicle supported above a ground surface by jacks arranged to be extendable on each side of a body frame. Work vehicle.

[0002]

2. Description of the Related Art In aerial work vehicles and crane vehicles in which a boom extends upward, jacks provided on each of the front and rear sides of the vehicle body prevent the vehicle body from falling over even when the boom extends upward. It is designed to be supported above the ground. The body is usually provided with steps for getting on and off the deck or loading platform.However, when the body rises above the ground surface, the body is raised above the ground surface. It is not easy to hang. For this purpose, for example, Japanese Utility Model Laid-Open Publication No. 1-161162 discloses a work vehicle in which a plurality of steps are provided on the outer surface of a jack and the steps are used to get on and off a deck or a loading platform.

[0003]

In such a working vehicle, steps are provided on the outer surface of the jack, which is vertical with respect to the vehicle body, so that each step is also arranged in a vertical state. ing. For this reason, when getting on and off the deck or the loading platform using each step, it is extremely dangerous unless the handle arranged above the jack is grasped with one or both hands. However, in the case where both hands hold luggage, the user cannot grasp the handle and cannot get on and off the vehicle safely.

The present invention is intended to solve such a problem. The purpose of the present invention is to make it possible to safely get on and off a deck or a loading platform without using both hands even when carrying luggage in both hands. It is to provide a work vehicle which can be used.

[0005]

The work vehicle according to the present invention has a structure in which each side of the body frame can extend downward.
A pair of jacks becomes is mounted respectively in a vertical state, a work vehicle in which each jack is supported in a state in which the vehicle body is lifted from the ground by extending each put in at least one of the jacks
A first step horizontally supported at a suitable height above the lower end of the jack by a support member attached to a lower end extending downward, and a state in which the body is lifted by the extension of each jack. When supported,
A second step horizontally supported by the vehicle body frame so as to form a step above the first step, thereby achieving the above object.

[0006]

In the working vehicle of the present invention, when the jacks lift the car body from the ground surface, the first step mounted horizontally on the jacks reaches a predetermined height with respect to the ground surface and is provided on the car body. The second step is stepped. Therefore, the operator can easily step in order from the first step to the second step.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an example of the work vehicle of the present invention, and FIG. 2 is a plan view of a rear portion of the work vehicle. In this work vehicle, a deck 15 is provided at a rear portion of the body frame 10, and a support base 11 is provided on the deck 15. A base end of a boom 12 is supported on the support base 11 so as to be rotatable in a vertical direction, and a bucket (not shown) for working at a high place is attached to a tip end of the boom 12.
The tip of the boom 12 is raised and lowered by an up-and-down cylinder 14 attached to the support base 11.

Each side surface 17 of the vehicle body frame 10 is provided with a stepped portion 17a slightly inwardly behind the rear wheel 16, and a side portion 17b behind the stepped portion 17a is provided with a stepped portion 17a. Front side part 1 of
7c. A horizontal second step 31 is attached to the step 17a and the side portion 17b along the lower end of each side portion 17b located inside. Further, a third intermediate position between the second step 31 and the upper surface of the deck 15 has a third position.
The step 32 is attached to the step portion 17a and the side portion 17b in a horizontal state.

The lower second step 31 extends rearward longer than the upper third step 32, and
The second step 31 and the third step 32 are stepwise in the front-rear direction.

A handrail 13 is provided on each side edge of the deck 15 in front of the step 17a.
Each handrail 13 is configured by a round pipe that extends upward from the upper surface of the deck 15 adjacent to the stepped portion 17a and is bent forward at the upper portion, and the front end thereof is
It is connected to a rear end surface of a wall portion 19 arranged along each side edge on the body frame 10.

The rear side surface portion 17b of the body frame 10
A jack 20 is attached to each of the rear ends. In addition, each of the front side portions 17 of the body frame 10
A jack 20 is also attached to each of the jacks c. Each jack 20 includes a hollow outer post 21 having a rectangular cross section which is vertically attached to each side surface 17 of the body frame 10, and an inner post 22 which is disposed inside the outer post 21 so as to be able to advance downward. have. A horizontal ground plate 23 is attached to the lower end surface of the inner post 22.
3 is pressed against the surface of the ground by the inner post 22 advancing downward. Then, with the ground plate 23 pressed against the ground surface, the inner post 22 advances further downward, so that the entire vehicle body is lifted up from the ground surface and supported by each jack 20.

FIG. 3 shows the lower end of the jack 20 in FIG.
3 is a side view taken along line AA of FIG. 3, and FIG. 4 is a side view taken along line BB of FIG. The first step 2 is provided on the inner post 22 of each jack 20 provided at the rear of the body frame 10.
4 are provided. The first step 24 is horizontally supported at an appropriate height above the ground plate 23 in front of the inner post 22 by the outer support plate 25 and the inner support plate 26. The outer support plate 25 has a parallelogram shape with a lower end attached to the outer surface of the ground plate 23 and an upper end surface positioned in front of the inner post 22. The upper end surface of the inner support plate 26 has the first step 24.
And is inclined so as to gradually approach the ground plate 23 as the front side edge becomes lower. The rear side edge is in a vertical state along the inner post 22 and the outer post 21, and the lower end extends rearward along the inner surface of the ground plate 23.
The portion extending rearward is attached to the inner surface of the ground plate 23.

The first post attached to the inner post 22
In step 24, when the inner post 22 advances downward from the outer post 21 and the ground plate 23 is pressed against the surface of the ground and the vehicle body is lifted, the vehicle body frame 1
0, which is approximately halfway between the lower second step 31 provided on the side surface and the ground surface, and therefore the first step 2
4, the second step 31, the third step 32, and the upper surface of the deck 15 are arranged stepwise in the front-rear direction.

In the aerial work vehicle having such a configuration, the inner post 22 of each jack 20 is advanced downward from the outer post 21 when performing the aerial work.
Then, the ground plate 23 attached to the lower end of the inner post 22 is pressed against the surface of the ground, and the inner post 22 advances downward, so that the vehicle body is lifted off the surface of the ground.

In such a state, the first step 24 attached to the lower end of the inner post 22 is also lowered, and when the ground plate 23 is pressed against the ground surface and the vehicle body is lifted off the ground surface, the first step is performed. Step 24 is located at a predetermined height from the ground surface, and is located at a substantially intermediate height between the second step 31 provided on the body frame 10 and the ground surface. As a result, the first step 24, the second step 3
1st, 3rd step 32, and deck 15 above it
Becomes a step-like shape that gradually increases from the rear to the front,
The operator can easily climb on the deck 15 without using both hands by stepping on the first step 24, the second step 31, the third step 32, and the deck 15 in this order. Conversely, even when descending from the deck 15, by stepping on the third step 32, the second step 31, and the first step 24 in order, it is possible to easily descend on the ground without using both hands. . Therefore, even with luggage in both hands, deck 15
You can get on and off easily.

[0017]

As described above, the work vehicle of the present invention is characterized in that the first step, which is horizontally attached to the lower end portion of the jack extending downward, is such that the vehicle body is lifted by the extension of the jack. The operator can easily get on and off the vehicle body because of the second step provided in the vehicle.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the work vehicle of the present invention.

FIG. 2 is a plan view of a rear portion.

FIG. 3 is a side view taken along line AA of FIG.

FIG. 4 is a side view taken along line BB of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body frame 13 Handrail 15 Deck 20 Jack 21 Outer post 22 Inner post 23 Ground plate 24 First step 25 Outer support plate 26 Inner support plate 31 Second step 32 Third step

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 4-44280 (JP, U) JP-A 4-57457 (JP, U) (58) Fields surveyed (Int. Cl. ⁶ , DB name) B60R 3/00

Claims (1)

(57) [Scope of request for utility model registration] 1. Each side of the body frame has a lower
A pair of jacks adapted to be extended towards the mounted respectively in the vertical state, the jack it
Is the vehicle body by stretching is a work vehicle that is supported in a floating state from the surface, extending downwardly at least one of the jacks
A first step horizontally supported by a support member attached to a lower end portion of the jack at an appropriate height above the lower end of the jack, and when the vehicle body is supported in a floating state by extension of each jack. And a second step horizontally supported by the vehicle body frame so as to form a staircase above the first step.