JPH04996Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a footboard device for a freight vehicle, and more particularly to a footboard device capable of loading and unloading various vehicles from two wheels to four wheels.

(Prior technology) A pair of left and right footboards are attached to the rotating shaft at the rear of the loading platform so that they can slide freely under the driving force of a cylinder.
The left and right footboards can be slid to the appropriate width depending on the width of the wheels being loaded and unloaded. (For example, Mikiaki
54-18964 (problem to be solved by the invention) By the way, depending on the vehicle, it may not be possible to use footboards. For example, if the front and rear wheels of a vehicle such as a tricycle or agricultural tractor are not aligned in a straight line, it is impossible to load or unload it even if the position and spacing of the left and right footboards are adjusted geometrically. However, there was a problem in that the vehicles that the conventional device could load and unload were limited to those with four wheels, where the front and rear wheels were aligned in a straight line.

The purpose of the present invention is to provide a footboard device that can load and unload not only vehicles whose front wheels and rear wheels are aligned in a straight line, but also vehicles whose front and rear wheels are not aligned in a straight line. do.

(Means for Solving the Problems) In order to achieve the above-mentioned purpose of the present invention, a rotating shaft is horizontally mounted on the rear part of the loading platform, and an arm vertically attached to the center of the rotating shaft is attached to the bottom of the loading platform. The rod of the undulating cylinder is pivoted, and the base ends of two inner and outer footboards are attached to the left and right parts of the rotating shaft so that they can rotate integrally and slide freely, and a sliding drive element is attached to one of the left and right inner and outer footboards. It is characterized by a structure in which a pair of connecting elements are provided between the footboards that are connected to each other and slide in response to the driving force of the driving elements, and the adjacent footboards.

(Function) Of the two left and right footboards, one of the driving and sliding footboards slides the other connected footboard to a desired position, and when the connection is released, it automatically moves to the desired position. A total of four footboards can be adjusted to the desired position and spacing from substantially two to three to four by driving and sliding into position.

(Example) An example of implementing the present invention will be described in detail below with reference to the drawings.

A loading platform 1 of a freight vehicle A has a rotating shaft 3 horizontally mounted on the rear surface 2, and a undulating cylinder 4 is attached to the bottom of the loading platform 1, and a rod 5 of this cylinder 4 is an arm vertically disposed at the center of the rotating shaft 3. 6 and pin 7, and the rotating shaft 3 is linked to the rod 5.
rotates clockwise or counterclockwise.

The rotating shaft 3 has the base ends of two inner and outer footboards 8, 8 attached to the left and right shaft portions thereof so as to be integrally rotatable and slidable. Therefore, the radial cross-sectional shape of the rotary shaft 3 and the cross-sectional shape of the shaft hole 9 of the step board 8 are formed into a shape that matches, for example, a square shape, so that each step board 8 is adapted to the rotational movement of the rotary shaft 3 with respect to the rotary shaft 3. While it moves up and down in response, it is also slidable.

The left and right outer footboards 8, 8 each have a knock pin 10 hanging at their base end so as to always hang down under their own weight. They are respectively fitted into elongated holes 12 which are opened in the longitudinal direction of the arm.

The operating arms 11, 11 are attached to a support shaft 13 on the bottom of the loading platform 1.
The rear end is attached so as to be able to swing left and right in the horizontal direction using the fulcrum as a fulcrum, and the arms are connected to each other by a connecting rod 1 suspended in a sash-like manner between the front and rear arms with the support shaft 13 as a boundary.
4 and 14, the left and right sides are integrally linked, and one of the operating arms 11 is connected to a sliding drive element, that is, a cylinder 15. The rear ends of both actuating arms 11 pass through horizontal long guide holes 16, 16 on the left and right sides of the rear surface part 2 of the loading platform, reach below the knock pin 10, and are connected to the knock pin 10, thereby controlling the driving force of the cylinder 15. The left and right outer footboards 8, 8 are made to slide by receiving the support.

A pair of connecting elements 17 are provided on the left and right inner and outer footboards 8, 8, so that the inner footboard 8 slides following the outer footboard 8 in the connected state.

The connecting element 17 has connecting bodies 18, 18 fixed to the bottom surfaces near the proximal ends of the inner and outer footboards 8, 8 in a facing manner;
It consists of a connecting pin 20 that can be inserted into and removed from the pin hole 19 of both connecting bodies 18. When the connecting pin 20 is inserted into the pin hole 19 of both connecting bodies 18, its head is pressed by the stopper 21, and the same Unless the stopper 21 is removed, the connection between the inner and outer footboards 8, 8 is prevented. Further, the connecting pin 20 is connected to a holder 22 on the bottom surface of the outer footboard 8 with a chain 23, and can be temporarily fixed to the holder 22 when it is removed from the pin hole 19.

The cylinders 4 and 15 are operated using the hydraulic rotation of the truck A, and the operating device is the driver's seat,
Installed on one side of the loading platform.

This makes it possible to load and unload a vehicle, for example, in the case of a three-wheeled vehicle such as a road roller, or an agricultural tractor whose front and rear wheels do not move forward and backward in a straight line, the left and right inner and outer footboards 8, 8 are moved individually. In the connected state, first operate the cylinder 15,
Slide the inner footboard 8 and the outer footboard 8 to the desired position, then remove the connecting pin 20 to release the connection, and use the cylinder 15 again to move the outer footboards 8, 8 to the desired position. The steps are slid and adjusted to a predetermined position and spacing, and each footboard 8 is lowered using the undulating cylinder 4 while maintaining the predetermined position and spacing as the rotary shaft 3 rotates until the tip touches the ground. , these footboards 8 can be used as roadboards for loading and unloading.

In addition, if the vehicle is a two-wheeled vehicle, leave a slight gap between the left and right inner and outer footboards 8, and set one side for two-wheeled vehicles and one for two-wheeled vehicles.
The other side can be used as a road board for workers, allowing them to be loaded and unloaded on both the left and right sides at the same time.

Of course, in a four-wheeled vehicle where the front wheels and rear wheels are aligned in a straight line from front to back, the distance can be adjusted by sliding the left and right inner and outer footboards 8, 8 while connected, corresponding to the width of the vehicle. It can be loaded and unloaded freely.

In the above embodiment, the left and right inner footboards 8 are connected to the cylinder 15 so that the inner footboards 8 slide, and the outer footboards 8 follow and slide. , the left and right operating arms 11 are operated by dedicated cylinders, and furthermore, the cylinder of the sliding drive element is provided between the arm protruding from the end of the rotating shaft 3 and the inner footboard 8. is also optional and does not change the gist of the present invention in any way.

Similarly, the connecting element 17 may also be other types, such as a hook piece and its hook piece.

(Effect of idea) Therefore, the present invention has the following advantages.

By adjusting the position and spacing of the two inner and outer footboards on the left and right sides, it is possible to adjust not only vehicles where the front and rear wheels are aligned in a straight line, but also vehicles where the front and rear wheels are not aligned in a straight line. It is useful because it can be loaded and unloaded freely, and there are no restrictions on the vehicles it can be loaded on.

One of the inner and outer footboards is slid by a sliding drive element, and the other footboard is also controlled to slide at the same time, so the sliding adjustment of the two inner and outer footboards can be performed using a minimum number of sliding drive elements. It is useful because it can be done easily and is labor-saving.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the step board device for a truck according to the present invention. FIG. 2 is an enlarged longitudinal sectional view taken along the - line. FIG. 3 is an exploded enlarged front view of the connecting element. FIG. 4 is a cross-sectional view of the same taken along the - line. FIG. 5 is an enlarged plan view, partially cut away, showing a state in which the sliding drive element is operated to slide the left and right inner and outer footboards in the connected state. FIG. 6 is a partly cut away plan view of the same state in which the left and right inner and outer footboards have been disconnected and the outer footboards have been slid. In the figure, 1 is the loading platform, 2 is the rear part, 3 is the rotation axis, and 4
is a cylinder for undulation, 5 is a rod, 6 is an arm, 8
15 is a sliding driving element, and 17 is a connecting element.

Claims (1)

[Scope of utility model registration request] A rotating shaft is mounted horizontally on the rear of the loading platform, and the rod of the cylinder for raising and lowering on the bottom of the loading platform is pivoted to an arm vertically attached to the center of this rotating shaft, and two inner and outer steps are installed on the left and right sides of the rotating shaft, respectively. The base end of the board is attached so as to be integrally rotatable and slidable, and a driving element for sliding is connected to one of the left and right inner and outer footboards, respectively, and the footboard is adjacent to the footboard that slides by receiving the driving force of this drive element. A footboard device for a freight vehicle, which includes a footboard and a pair of connecting elements.