JP2003200784A - Car-mounted rear gate allowing easy loading of vehicle particularly lower in height - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow easy and safe loading of a vehicle particularly lower in height without requiring a long loading space in the point of performance and to require lower cost in the point of profitability by partially improving an existing car to be mounted without repurchasing a new car in consideration of present severe economic conditions. <P>SOLUTION: This rear gate, whose ride-in portion is very thin, 5 cm or less in thickness, at least 90 cm or more in length and of a turn-around type to allow easy loading of the vehicle particularly lower in height, has the function of adjusting a ride-in angle, as required, by adjusting the angle of a turn-around portion. Besides, in the point of operation and working safety, the automatic adjustment of the angle of the rear gate in use, storage and ride-in is allowed by a hydraulic mechanism or others. In the point of profitability, an existing car-mounted rear gate can be replaced without repurchasing a car itself to be mounted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear gate for an on-vehicle vehicle, which can easily mount a vehicle having a particularly low vehicle height.

[0002]

2. Description of the Related Art Recently, from the viewpoint of further improvement of services to customers such as vehicle failure / accident and delivery / collection at the time of vehicle inspection and labor saving, a single-vehicle vehicle has become popular.
In particular, for a single-vehicle vehicle, a so-called self-loader type (type in which a loading platform slides backward by a hydraulic cylinder or the like), which is excellent in workability, operability, and economical efficiency, is generally popular. However, recently, the height of passenger cars has become particularly low due to the installation of air dams on the front bumper, etc. It has become common to contact and damage the bumper.

For this reason, each on-vehicle vehicle manufacturer minimizes the boarding angle as much as possible, and increases the rear slide length and the rear gate length of the cargo bed so that a vehicle with a particularly low vehicle height can be loaded. As a result of the improvements, vehicles with a lower vehicle height than before can be loaded, but for vehicles with a particularly low vehicle height (for example, a vehicle with a clearance between the front bumper with an air dam and the ground of about 5 cm) is easy. Since it is not possible to load the vehicle and the space for loading the vehicle is longer than before, it is difficult to work in a narrow space.

[0004]

In terms of performance, it is possible to easily and safely load a vehicle with a particularly low vehicle height without making the vehicle loading space as long as possible. Next, in terms of economic efficiency,
In view of the current severe economic situation, it is possible to keep the cost low by partially improving the on-vehicle vehicle of the type currently used without renewing the vehicle.

[0005]

[Means for Solving the Problems] Looking at the ground clearance of the front part of a vehicle having a particularly low vehicle height for each vehicle model, the ground clearance of about 5 cm at a position about 90 cm forward from the center of the front tire.
Since m is the lowest vehicle, the loading angle of the rear gate needs to be 5/90 or less in order to mount the vehicle on the bed of the vehicle without any problem. However, with such a gentle gradient, a very long rear gate is required to actually mount the vehicle on the vehicle,
Such a long rear gate is not only difficult to store, but there is practically no place to load it.

Therefore, as for the rear gate, the thickness of the boarding portion is very thin, 5 cm or less, and the length is at least 90 cm or more. It is a folding type, and the riding angle can be adjusted as necessary by adjusting the angle of the folding portion. It has a function that can be adjusted. At the same time, from the standpoint of operability of the equipment and safety of work, the use and storage of the rear gate and adjustment of the boarding angle will be automatically performed by a hydraulic mechanism. In terms of economy, the problem is solved not by replacing the vehicle-mounted vehicle itself but by improving a part of the vehicle-mounted vehicle currently used.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings. As for the types of vehicle-mounted vehicles, there are some vehicle-mounted vehicles that lift the front part of the vehicle by hydraulic cylinders attached to the left and right of the loading platform, but the so-called self-loader type in which the loading platform is slid backward is generally popular. Therefore, this type will be described as a base vehicle.

First, when the main configuration of the rear gate is classified according to functions and functions in FIGS. 1 and 2, first, the rear gate base side walk plate 1, the rear gate folding back side walk plate 2, the net plate 3, the rear gate base side. Shaft 4, rear gate folding shaft 5, mounting bolt 6, folding arm 7, step plate lock hinge 13, rear gate mounting hinge 14
Main body of the folded back type rear gate, and then the folding stopper 8, the folded side rear gate opening arm 9, the opening arm action pin 10, the wire 11, the rear gate opening / closing arm 12, the rear gate opening / closing hydraulic cylinder 15,
A mechanical portion for automatically opening and closing the rear gate main body portion including a hydraulic control valve 28 and the like, and finally, a hydraulic cylinder 21 for turning back angle adjustment, a rotary roller 24, a roller shaft 25, a roller arm 26, a hydraulic control solenoid valve 29, and the like. It can be roughly divided into three mechanical parts for adjusting the rear gate loading angle.

Next, the specific functions and actions will be described.
When the step board lock hinge 13 is removed and the hydraulic control valve 28 is operated, the rod of the rear gate opening / closing hydraulic cylinder 15 contracts and the rear gate opening / closing arm 12 pulls the rear gate opening / closing arm 12 toward the body side. The side gate plate 1 and other rear gate main body parts start to fall toward the vehicle rear side. Along with this, the wire 11 starts to be tensioned, and the folding-side rear gate opening arm 9 starts to rotate leftward about the rear-gate folding-side shaft 5 to rotate the opening arm action pin 10 in the same direction. However, this action is such that when the folding arm 7 and the folding stopper 8 come into contact with each other, the rear gate folding side walk plate 2 continues to rotate leftward about the rear gate original shaft 4 as shown in FIG. Contact in a spread state,
The preparation for boarding the vehicle is complete. (If there is no structure in which the folding arm 7 and the folding stopper 8 are in contact with each other and the center of rotation is changed from the rear gate folding side shaft 5 to the rear gate original side shaft 4, when the rear gate is widened and brought into contact with the ground, (A step is formed at the joint between the turn-back side walk plate 2 and the rear gate original-side walk plate 1, so that a vehicle with a particularly low vehicle height cannot easily get in.)

Since the preparation for boarding is completed, when the vehicle is actually boarded, the clearance between the lower surface of the front part of the vehicle and the ground is 90 degrees from the center of the front tire as shown in FIG.
Since it is 5 cm at the position of cm, it is possible to board the vehicle up to the state of FIG. 6 without any problem. However, if it goes further than this, the front bumper and the rear gate front step plate 1 may come into contact with each other, which may damage the bumper. Therefore, the hydraulic control solenoid valve 29 is operated to move the rod of the folding portion angle adjusting hydraulic cylinder 21. When the roll is extended and the rotating roller 24 is pressed against the ground so that the rear gate front side walk plate 1 and the rear gate folding back side walk plate 2 are in a straight state, a gap between the front bumper and the rear gate front side walk plate 1 is obtained. Therefore, even a vehicle with a particularly low vehicle height can be easily placed on the bed of an in-vehicle vehicle.

At this time, however, since the rear gate step plate 1 is lifted up with the rear gate mounting hinge 14 as the center of rotation, a force for extending the rod acts on the rear gate opening / closing hydraulic cylinder 15, and if it is left as it is, the rear gate opening / closing hydraulic cylinder is left. 15 and the rear gate opening / closing arm 12 may be damaged. Therefore, the hydraulic control solenoid valve 2
At the same time when 9 is operated, electricity is applied to the open solenoid valve 19 to open the valve, and the left and right hydraulic ports of the rear gate opening / closing hydraulic cylinder 15 are connected via hydraulic pipes so that the rod can freely extend as required. . At this time, if the amount of oil increases or decreases between the left and right hydraulic ports as the rod expands or contracts, the rod does not expand or contract properly. Therefore, the rear gate opening / closing hydraulic cylinder 15 is a double rod cylinder having rods of the same size.

After that, the rod of the hydraulic cylinder 21 for adjusting the angle of the folded portion is returned to its original state to restore the folded angle of the rear gate to the original state, and the rear gate is stored by operating the hydraulic control valve 28. The board 2 is naturally stored by its own weight), the vehicle is returned to the running state, and the step board lock hinge 13 locks the step board. It should be noted that when the vehicle is lowered, this series of operations may be reversed.

[Brief description of drawings]

FIG. 1 is a side view when a rear gate is stored.

FIG. 2 is a rear view when the rear gate is stored.

FIG. 3 is a rear gate folding back side walk plate 2 in which a wire 11 is generated when the rod of the rear gate opening / closing hydraulic cylinder 15 is contracted.
FIG. 8 is a side view when the rear gate turn-back side shaft 5 is being opened by the pulling action of FIG.

FIG. 4 is a view showing that the step board 2 on the folding back side of the rear gate has the wire 11 accompanying the contraction of the rod of the hydraulic cylinder 15 for opening and closing the rear gate.
FIG. 7 is a side view when the rear-gate base-side shaft 4 is opened by the pulling action of.

FIG. 5 is a side view when a vehicle is started to be loaded.

FIG. 6 is a side view of the vehicle when the front bumper of the vehicle is on the verge of coming into contact with the rear gate step plate 1;

FIG. 7 is a side view when the angle of the folded-back portion is adjusted in order to widen the gap between the front bumper of the vehicle and the rear gate original step plate 1.

[Explanation of symbols]

1. Rear gate front side walk board 2. Rear gate turn side walk plate 3. Mesh plate 4. Rear gate shaft 5. Rear gate folding shaft 6. Mounting bolts 7. Folding arm 8. Wrapping stopper 9. Rear side gate opening arm 10. Open arm action pin 11. Wire 12. Rear gate opening / closing arm 13. Step board lock hinge 14. Rear gate mounting hinge 15. Hydraulic cylinder for opening and closing the rear gate 16. Hydraulic pipe 17. piston 18. Hydraulic cylinder mounting part for opening and closing the rear gate 19. Open solenoid valve 20. Car body 21. Hydraulic cylinder for folding angle adjustment 22. Hydraulic cylinder roller side mounting part 23. Hydraulic cylinder mounting part 24. Rotating roller 25. Roller shaft 26. Roller arm 27. Roller arm mounting part 28. Hydraulic control valve 29. Solenoid valve for hydraulic control

Claims (4)

[Claims] 1. A folding-type rear gate having a rear-gate original shaft (4), a rear-gate folding-side shaft (5), a folding arm (7), and a folding-back stopper (8), wherein a rear-gate opening / closing hydraulic cylinder (15) is provided. Utilizing the action, the rear gate folding back side opening arm (9) attached to the rear gate folding back side shaft (5) by the pulling force of the wire (11) causes the rear gate folding back side step plate (2) via the opening arm working pin (10). ) Automatically opening and closing the rear gate for in-vehicle vehicles 2. A hydraulic cylinder (2) for adjusting an angle of a folded portion.
A rear gate for an on-vehicle vehicle that can adjust the vehicle entry angle as necessary by pressing the ground with the rotating roller (24) as the expansion and contraction of 1) occur. 3. An opening solenoid valve (19) attached to a rear gate opening / closing hydraulic cylinder (15) is used as a hydraulic control solenoid valve (29) so as not to damage the rear gate opening / closing mechanism (12, 15, 18, etc.) when adjusting the boarding angle. 3. The rear gate for a vehicle according to claim 2, wherein the rear gate opening / closing hydraulic cylinder (15) can be freely expanded / contracted by simultaneously opening the left and right hydraulic ports during operation. 4. A rear gate for an in-vehicle vehicle that also has the functions of claims 1 and 3.