JP3744619B2 - Work vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a work vehicle such as a rescue work vehicle equipped with a tool hangar, and more particularly, a work vehicle having an improved tread and door plate provided in a lower portion of a lateral side portion of the hangar so as to protrude laterally. About.
[0002]
[Prior art]
Rescue work vehicles that are dispatched when a disaster such as a major fire or earthquake strikes and rescue a victim from a collapsed building or the like are equipped with a hangar containing tools at the rear of the cab. In the hangar, shelves are provided in multiple stages to store a large number of tools, and the tools on the shelves can be taken out by pulling up the shutters on the side portions.
[0003]
However, among the tools stored in these shelves, tools placed at a high position above cannot be taken out while the operator is standing on the road, so that this removal is possible, The door plate of the storage part at the lower part of the hangar is configured to be able to fall down horizontally, and the horizontal door plate is used as a tread plate so that an operator can ride on it.
[0004]
However, in the conventional rescue work vehicle, the mounting structure of the door plate also serving as a tread plate is such that the lower end of the door plate 51 is connected to the bottom entrance of the storage portion 54 with a hinge 55 as shown in FIG. The shaft can be turned and can be switched between an upright position and a horizontal position by being suspended by a chain 56. For this reason, when the door plate 51 is set to the horizontal position, the width W protruding in the horizontal direction is the same as the entire length of the door plate 51, which obstructs passage on narrow roads, or in the worst case the door plate 51. There was a problem such as being unable to level.
[0005]
In addition, the height from the road surface to the bottom surface of the storage portion 54 is required to be 450 mm or less from the ground according to the law. However, in a general rescue work vehicle, in order to avoid the vehicle from being easily damaged by an obstacle or the like on the road, the road clearance is set to a large value of 450 mm up to a predetermined upper limit. In addition, although the bottom plate of the storage portion 54 is structured not to bend, the height when the door plate 51 is a horizontal tread is 490 mm in order to secure a thickness of about 40 mm. However, the height near 490 mm as this tread is a height that makes it difficult for an operator with a short height to get on and off, and sometimes hinders rescue work.
[0006]
[Problems to be solved by the invention]
The purpose of the present invention is to improve the structure of the treadle / door plate provided in the storage part at the lower part of the hangar, shorten the protruding length of the door plate when leveled, and facilitate work on narrow roads. An object of the present invention is to provide a work vehicle that can easily get on and off even for a short worker while ensuring a large load clearance.
[0007]
[Means for Solving the Problems]
The present invention that achieves the above-described object is a treadle door that can be alternately rotated between an upright position that closes the entrance of the storage section and a horizontal position that falls outside the storage section entrance provided at the lower portion of the lateral side of the hangar. In a working work vehicle provided with a plate, a pivot arm is connected to the door plate, the pivot shaft of the pivot arm is located at a position closer to the inside of the vehicle body than the entrance of the storage section, and Provided at a position corresponding to the lower part, when the door plate is in a horizontal position, the door plate moves to a position lower than the bottom surface of the storage unit, and a part of the door plate is below the bottom surface of the storage unit. It is characterized by having entered .
[0008]
In this way, the pivot shaft of the pivoting arm connected to the door plate is provided at a position where the pivot arm enters the vehicle body from the storage portion entrance and corresponds to the lower portion of the storage portion. When the door plate is turned from the upright position to the horizontal position, a part of the door plate enters the lower side of the storage portion and can be shifted to the inside of the vehicle body. In other words, the length of the door plate that protrudes horizontally from the entrance to the lateral side can be made shorter than the entire length of the door plate, and it can be used and operated as a tread on a narrow road. .
[0009]
In addition, the door plate when it is rotated to the horizontal position moves to a position lower than the bottom surface of the storage unit. Therefore, even if the load clearance is set to 450 mm, the height from the road surface as a tread plate can be increased. This makes it easier to get on and off even for short workers while ensuring a large road clearance.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 show a rescue work vehicle that is dispatched when a disaster occurs as an example of the work work vehicle of the present invention. The rescue work vehicle 1 is configured by installing a cab 2 at the front and a hangar 3 on which tools are mounted at the rear. The hangar 3 is provided with multistage shelves 9 with the left and right side surfaces as openings, and the tools 10 are mounted on these shelves 9. In addition, up-and-down open / close shutters 7 are attached to the openings, and door plates 11 and 13 are attached to storage portions 14 provided at the front and rear sides with the rear wheel T sandwiched on the lower side. As will be described in detail later with reference to FIGS. 3 and 4, the door plates 11 and 13 are configured to rotate outwardly to a horizontal lying position around a horizontal pivot shaft provided on the lower end side.
[0011]
The door plates 11 and 13 that have fallen to the lying position are also used as treads, and are used when taking out the rescue tools 10 mounted on the shelf 9 at a high position.
A door plate 12 is also attached to a portion facing the rear wheel T, and a pivot shaft is provided at an intermediate portion in the height direction so as to open and close between an upright position in FIG. 1 and a horizontal position in FIG. . This door plate is exclusively for the step board, and is formed in the recess 12a so that the lower end side does not interfere with the rear wheel T when it is laid down as a step plate.
[0012]
15 is a ladder installed on the upper surface of the hangar 3, 16 is a small crane attached to the rear end of the vehicle body, and 17, 18, 19 are opening / closing handles provided on the surfaces of the door plates 11, 12, 13.
The opening / closing mechanism of the door plates 11 and 13 is as shown in FIGS. Since the opening and closing mechanisms of the door plates 11 and 13 are the same, the door plate 11 will be described below as a representative.
[0013]
A pair of left and right L-shaped turning arms 20 are attached to the back surface of the door plate 11, one end side of the turning arm 20 is fixed to both side portions of the door plate 11 by welding, and the other end side is stored. It extends to the inside of the portion 14 and is fixed to the lower end of the side wall 14a by a nut 22 with a bolt 21 as a pivot shaft X.
When the door plate 11 is rotated from the upright position closing the inlet of the housing portion 14 outwardly about the pivot shaft X, pivot axis of the L-shaped pivoting arm 20 when the door plate 11 becomes a horizontal state The arm portion from the X to the L-shaped bent portion abuts against the bottom surface 14b of the storage portion 14, is held in its horizontal position, and acts as a stopper that prevents further opening.
[0014]
Further, a biasing means 30 that biases the door plate 11 in a direction to always close the door plate 11 is connected between the door plate 11 and the storage portion 14. The urging means 30 is provided with a damper having a rod 32 attached to a cylinder body 31 filled with compressed gas so as to be reciprocally movable. The rear end of the damper is attached to a side wall 14a constituting the storage portion 14 by a bolt 34 via a rear end flange 33 attached to the rear end of the cylinder body 31, and the front end of the damper is connected to a front end flange 35 attached to the front end of the rod 32. And is attached to the rotating arm 20 by a bolt 36. In this attached state, the rod 32 is constantly urged toward the tip end side of the rod 32 by the compressed gas.
[0015]
Thus, by providing the urging means 30 in the direction of always closing, the door plate 11 can be easily closed without requiring a large force when closing the door plate 11.
According to the mounting structure of the door plate 11 described above, when the door plate 11 is laid down in a horizontal position around the pivot axis X of the rotating arm 20, as shown by a two-dot chain line in FIG. A part enters below the bottom surface 14b of the storage part 14, and shifts to the inside of the vehicle body from the storage part entrance. Therefore, the door plate 11 is shortened compared with the conventional structure of FIG.
[0016]
Further, when the door plate 11 is in the horizontal position, it moves to a position lower than the bottom surface of the storage portion. Therefore, even if the load clearance is set to 450 mm, which is larger than the specified upper limit, the door plate 11 is closer to the road surface than the conventional structure shown in the figure. The height of the vehicle becomes low, and it is easy to get on and off even for short workers while ensuring a large road clearance.
In the present invention, the urging means 30 described in the illustrated embodiment is not necessarily required, and may be provided as appropriate according to the scale of the work vehicle. The urging means 30 is not limited to the above-described damper as long as it can be urged in the closing direction in order to facilitate the closing of the door plate. For example, a tension spring or the like is used. It may be.
[0017]
The present invention can be preferably used for the rescue work vehicle described as the embodiment, but is not limited thereto, and may be, for example, a civil work vehicle equipped with a civil engineering tool, and is equipped with work tools. Any work work vehicle provided with a door plate that also serves as a tread plate can be suitably used.
[0018]
【The invention's effect】
As described above, according to the present invention, the pivotal support shaft of the rotating arm connected to the door plate is provided at a position entering the vehicle body from the entrance of the storage portion and at a position corresponding to the lower portion of the storage portion. When the plate is rotated from the upright position to the horizontal position, a part of the door plate enters the lower side of the storage part and shifts to the inside of the vehicle body, so that the door plate is laterally outward from the storage part entrance. Since the length that protrudes horizontally can be made shorter than the length of the entire door plate, it can be used as a tread on a narrow road.
[0019]
In addition, the door plate when it is rotated to the horizontal position moves to a position lower than the bottom surface of the storage unit. Therefore, even a short worker can easily get on and off while securing a large load clearance.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a work vehicle according to the present invention.
FIG. 2 is a side view showing a state in which a door plate also serving as a tread plate is opened in FIG. 1;
FIG. 3 is a cross-sectional view of an essential part showing a mounting state of a door plate also serving as a tread plate.
4 is a cross-sectional view taken along arrow AA in FIG. 3;
FIG. 5 is a cross-sectional view of a main part showing a mounting state of a conventional door plate also serving as a tread plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rescue work vehicle (working work vehicle) 3 Hangar 9 Shelf 10 Tools 11, 13 Door plate 14 Storage part 20 Rotating arm 21 Bolt 30 Energizing means X Pivot

Claims (3)

At the entrance of the storage section (14) provided at the lower part of the lateral side of the hangar (3) , the door also serves as a treadle that can be rotated alternately between an upright position that closes the entrance of the storage section (14) and a horizontal position that falls outward in the plate (11) is provided working tool vehicle (1), said door plate (11) connecting the pivot arm (20), said housing part the pivot (X) of the pivoting arm (20) (14) When the door plate (11) is placed in a position that is closer to the inside of the vehicle body than the entrance and corresponds to the lower portion of the storage portion (14) , and the door plate (11) is in a horizontal position, the door plate ( 11) is moved to a position lower than the bottom surface (14b) of the storage portion (14), and a part of the door plate (11) enters below the bottom surface (14b) of the storage portion (14) . Work vehicle (1) . The connecting portion of the rotating arm (20) with respect to the door plate (11) to the pivot shaft (X) is formed in an L shape, and the bent portion in the middle of the L shape to the pivot shaft (X) . The work machine vehicle (1) according to claim 1, wherein the arm portion is configured to abut on a bottom surface (14b) of the storage portion (14) when the door plate (11) is in a horizontal position. Between the door plate (11) and said housing portion (14), said door plate (11) closing the working tool vehicle of claim 1 or 2, wherein interposed a biasing means in a direction (30) (1 )

Images