JPS6146030Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cargo handling device for a freight vehicle, and more particularly to a cargo handling device of the type in which a table is stored under the floor of a cargo platform in a folded state.

In this type of cargo handling equipment, the arm of the linkage device and the folded table are placed as close to parallel as possible because it is necessary to store the folded table in the space obtained under the floor. had been formed. In other words, the angle α between the table and the arm in the retracted state is small.

Therefore, although the folding table fits small under the floor of the cargo platform, it is necessary to manually lift the folded table, which is tilted toward the back, and rotate it forward after lowering the arm to the ground. This caused workers to have bad posture and required a great deal of effort.

The object of this invention is to provide a cargo handling device for a truck that can eliminate such conventional drawbacks.

In other words, the feature of this invention is that in an under-floor storage type cargo handling device that is equipped with a link device and a foldable table, and the table is stored under the floor in a folded state by the operation of the link device, the table in the folded and stored state is A table raising mechanism is provided to rotate the table upward in conjunction with the lowering of the arm of the link device, and the angle α between the arm and the table when stored under the floor is adjusted.
is small and α when the table is lowered to the ground is large, that is, the folded table can be moved to an almost upright position, eliminating the difficult work of manually lifting the table.

Next, the structure and operation of this invention will be explained in detail with reference to illustrative drawings.

As shown in the perspective view of Fig. 3 and the working state diagrams of Figs. A guide roller 5 is rotatably pivotally attached to the tip of the lever 4, and the guide roller 5 is mounted by its own weight on a guide plate 7 attached to a holder 6 installed horizontally between the left and right lower arms 1a. In the figure, reference numeral 8 denotes a connecting plate 9 that connects the pivot 3 connecting the receiving plate 2a and the tip of the upper arm 1 and the pivot 3a at the tip of the lower arm 1a;
is a hydraulic cylinder constituting a parallel linkage, 9
a is its piston. C is the locus of movement of the tips of the arms 1 and 1a.

When the hydraulic cylinder 9 is actuated to extend the piston 9a from the state where the folded table 2 is stored under the floor as shown in FIG. , 10a and rotates downward.

At this time, as shown in FIGS. 1 and 2, although the connecting plate 8 maintains a substantially vertical state, the angle between the upper arm 1 and the lower arm 1a gradually changes from an obtuse angle to an acute angle with respect to the connecting plate 8, so the roller 5
The lever 4 rolls upward on the guide surface of the guide plate 7, and the lever 4 rotates until it finally comes into engagement 12 with the end of the table 2.

When the upper arm 1 and the lower arm 1a further rotate downward, the roller 5 rolls upward on the guide surface of the guide plate 7, and the unfolding lever 4 further rotates while pushing up the table 2.

When the tips of the upper arm 1 and the lower arm 1a are almost in contact with the ground, the table 2 is moved to the second position.
As shown in the figure, the unfolding lever 4 pushes it up to an almost upright position.

Therefore, the worker can set up the table 2 in the use state by simply pulling the table 2, which is standing up almost upright, toward the user. The hard work of lifting the fallen table 2 is wiped away.

In addition, when the piston 9a is retracted, the angle between the arms 1, 1a and the connecting plate 8 changes from an acute angle to an obtuse angle. As the lever 4 rotates downward, the lever 4 finally separates from the table 2 and places the table 2 in the folded storage state.

Although the table raising mechanism a has been shown above, another embodiment of the table raising mechanism b will be described in detail with reference to FIG. 4 as follows.

That is, the base end of an unfolding lever 4a protruding forward is provided near the upper part of the base end pivot portion 10 of the upper arm 1, and a roller 5a is pivotally attached to the tip of the lever 4a. The table 2 in this state engages with the roller 5a as the piston 9a extends, and gradually rotates upward and rises to a substantially upright state.
Also, as arms 1 and 1a rise, table 2
is gradually inclined while engaging with the roller 5a, and is finally stored away from the roller 5a.

Note that the table raising mechanisms a and b are shown in Figure 1, Figure 4.
The table 2 is not limited to the one shown in the figure, and can be changed as appropriate, and the table 2 may be at any angle as long as it can be operated into the operating state by simply lifting the table 2 a little, even if the table 2 is not in an almost upright state.

This invention is based on the above-mentioned underfloor storage type cargo handling equipment, in which the table 2 in the folded storage state is connected to the arm 1.
Since the table 2 is characterized by being provided with table raising mechanisms a and b that rotate upward in conjunction with the lowering of the arms 1a, the table 2 automatically rises to an almost upright state when the arms 1 and 1a touch the ground, so that the operator can All you have to do is pull it lightly while in a comfortable position, and it is extremely simple and has excellent workability, which has great practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 and Fig. 2 are cross-sectional views showing the state in which the table rises in conjunction with the lowering of the arm, Fig. 3 is a perspective view showing the rising mechanism, and Fig. 4 FIG. 7 is a cross-sectional view showing the operating state of another embodiment. 1... Upper arm, 2... Table, 3...
...Axis, 4...Lever.

Claims (1)

[Scope of utility model registration request] A link device installed under the floor such that the base end shaft support of the arm is located in front of the rear end of the floor and the movement locus of the tip of the arm is located below the rear end of the floor, and the arm of this link device. A cargo handling device comprising a foldable table whose base end is pivotally supported at the tip of the arm, and in which the table is stored under the floor with the table in a folded state positioned at the top of the arm by the operation of a link device. A table raising mechanism is provided on the chassis side or the linkage side, which is located near the movement trajectory of the robot and on the front side of the floor from the movement trajectory, and contacts the table and raises the table when the arm rotates downward due to the operation of the linkage device. A freight vehicle cargo handling device characterized by: