JPH0127963Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Related Industrial Field) The present invention relates to a tailgate lifter installed at the rear of a freight vehicle. More specifically, when using a tailgate lifter to transport cargo between the floor of the vehicle's bed and the platform, there is a slight difference in height between the floor of the vehicle's bed and the platform, and the tailgate This invention relates to a gate plate tilting device that allows the gate plate to be used as a footboard when loading and unloading cargo in a place where the height difference is not large enough to handle the cargo by raising and lowering a lifter.

(Prior Art) Generally, when a tailgate lifter moves up and down between the platform floor and the ground, the gate plate is always held horizontally. On the ground, the gate plate tilts so that its tip touches the ground, allowing for safe loading and unloading of cargo.

However, in cargo handling operations between the platform and the platform, there is no problem if the loading platform floor and the platform top are approximately flush, but as shown in Figure 2, if the platform top is built slightly lower than the loading platform floor. Therefore, there is a problem inherent in cargo handling operations in places where there is a height difference h that is not large enough to handle cargo by raising and lowering a tailgate lifter.

Conventional solutions to this problem include (1) as shown in Figure 5A, an auxiliary span plate a is further hinged to the tip of the gate plate to be used as a footboard, and (2) as shown in Figure 5B. As mentioned above, there are devices that incorporate a hydraulic cylinder b exclusively for tilting into the gate plate and use this to tilt the gate plate.

However, in the former case (1), the load must be supported at the tip of the gate plate, so increased strength is required, and the auxiliary gang plate a has a steep slope, making it unsafe for the person carrying out the cargo. Furthermore, there was a problem in that the auxiliary span plate a had to be used even when it was not required.

In the case of the latter (2), although there are no operational problems, there are drawbacks such as increased weight and cost. Note that it is structurally easy to use the gate plate with the gate plate tilted upward as shown in FIG. 5C.

(Problem to be solved by the invention) When the top surface of the platform is slightly lower than the floor of the vehicle's cargo bed, it is possible to create a simple structure without providing an auxiliary span plate at the tip of the gate plate or additionally providing a hydraulic cylinder. To facilitate loading and unloading of cargo between the floor surface of a loading platform and the top surface of a platform by making a gate plate tiltable.

(Means for solving the problem) In the tailgate lifter, the base of the gate plate is pivoted to the vertical arm, which is one of the parallelogram-shaped link mechanisms attached to the rear of the vehicle, and the vertical arm and the gate can be raised and lowered. A spacer piece that can be taken in and out is interposed between the base of the board and the vertical surface, so that when the gate board is used as a footboard, the spacer piece can be pulled out and tilted.

(Example) FIG. 2 is a side view of the tailgate lifter. Reference numeral 1 designates a loading platform, and 2 designates a loading platform floor surface, on which cargo (not shown) is placed.The loading and unloading of this cargo is performed by raising and lowering a gate plate 3.

The gate plate 3 moves up and down between a raised position flush with the platform floor 2 and the ground surface. When stored, it is rotated further upward from the raised position around the pin 4 and stored, that is, stored in the position shown by the two-dot chain line at the rear of the loading platform 1.

The gate plate 3 is supported by a lift arm 5 and a vertical arm 8 pivotally connected to the end of a tension arm 6 with a pin 7. The lift arm 5 and the tension arm 6 are connected to an arm 10 by a cylinder 9 supported by a frame attached to the rear of the vehicle body.
It is pivotally connected by pins 13 and 14 to a rotating side plate 12 fixed to both ends of a rotating shaft 11 which is rotated via a rotating shaft 11 .

Now, the present invention uses the tailgate lifter T configured as described above to handle cargo on the platform P, especially on the floor surface 2 of the platform P and the top surface 15 of the platform.
There is a slight height difference h between the gate board 3 and the footboard, but the difference in height is not enough to drive the hydraulic cylinder 9 to handle the cargo. This will be explained in more detail below.

FIG. 1 is a view in the direction of the arrow in FIG. 2, that is, a perspective view of the gate plate 3 seen from the back side. Reference numeral 16 denotes a pair of main aggregates fixed to the back surface of the gate plate 3 in parallel with a gap between them. A bearing piece 17 is fixed to the gate plate 3 integrally with the main aggregate 16. One end of a tension arm 6 and a vertical arm 8 are pivotally supported on this bearing piece 17 by a pin 4. Then, as shown in FIG. 3, the side surface 1 of the vertical arm 8
8 and the end surface 19 of the main aggregate 16, a certain distance S is provided to allow a spacer piece to be described later to be inserted and removed.

Next, the tilting mechanism of the gate plate 3 will be explained.
20 is a rotary plate with a handle 21, which is rotatably attached to the back surface of the gate plate 3 by a support shaft 22. 23 is a link, which is attached symmetrically to the rotating plate 20 in the diametrical direction. Reference numeral 24 is a rod having one end pin-coupled to the link 23 and a spacer piece 25 fixed to the other end. And 26 is a bearing that supports the rod so that it can slide in its axial direction.

(Operation of the embodiment) When the handle 21 is rotated clockwise or counterclockwise, the spacing piece 25 can be moved in and out of the gap S shown in FIG. 3. Then, the spacer piece 25 has a gap S
When the gate plate 3 is in the state shown in FIG.
Elevating and lowering between the ground and the ground is performed.

When the spacing piece 25 is pulled out from the gap S, that is, when it is in the state shown by the two-dot chain line in FIG.
The gate board 3 is tilted in the direction of the arrow with the center at the center, and in this state the gate board 3 is used as a foot board. In addition, when the spacing piece 25 is moved in and out of the gap S, it can be easily done by turning the handle 21 after the gate plate 3 is placed in the retracted state (the position indicated by the two-dot chain line in FIG. 2).

(Effects) A gap is provided at a constant interval between the opposing edges of the vertical arm and the main aggregate, and the gap piece can be inserted and removed freely into the gap, and the gap piece can be pulled out and tilted, so it can be attached separately to the gate plate. It is now possible to use the gate board itself as a footboard without installing a footboard.

It is much cheaper than a hydraulic device type for tilting the gate plate, and has the advantage that it can be easily applied to conventional structures with simple modifications.

[Brief explanation of the drawing]

FIG. 1 is a rear perspective view of the gate plate in the direction of the arrow in FIG. Figure 2 is a rear side view of a vehicle equipped with a tailgate lifter. FIG. 3 is a side view of the gate plate tilting device of the present invention with the spacing piece inserted. Fourth
The figure is a side view with the spacer piece pulled out and removed. 5A and 5B show a conventional tilting device, and FIG. 5C is a side view of the husband with the gate plate tilted upward. In the diagram: 1...Cargo platform, 2...Cargo platform floor, 3
...Gate plate, 4...Pin, 5...Lift arm, 6...Tension arm, 7...Pin, 8...
... Vertical arm, 9 ... Hydraulic cylinder, 10
... Arm, 11 ... Rotating shaft, 12 ... Rotating side plate, 13, 14 ... Pin, 15 ... Top surface (of platform), 16 ... Main aggregate, 17 ... Bearing piece, 18 ... (Vertical side of the arm, 19
... End face (of main aggregate), 20 ... Rotating plate, 21 ...
...Handle, 22...Support shaft, 23...Link,
24...Rod, 25...Spacer piece, 26...Bearing.

Claims (1)

[Scope of utility model registration request] In the tailgate lifter, in which the base of the gate plate 3 is pivotally supported by a vertical arm 8 of a parallelogram link mechanism attached to the rear of the vehicle, and is movable and retractable, the side surface 18 of the vertical arm 8 and the side surface 18 of the gate plate 3 are connected to each other. A gate plate tilting device for a tailgate lifter, characterized in that a spacer piece 25 that can be taken in and out is interposed between the end face 19 of the main aggregate and the end face 19 of the main aggregate.