JPS6318264Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is attached to the rear of the vehicle body of a truck, and when loading cargo, the plate-like body extends from the floor of the vehicle body to the ground, making it easier to load cargo. This relates to cargo loading equipment for trucks.

As shown in FIG. 5, a conventional device of this type has an inclined plate base member 4 attached to the rear edge of a floor 3 of a vehicle body 2 of a truck that can be driven by wheels 1. The inclined plate base member 4 is mounted so as to be able to swing up and down.
An inclined plate tip member 6 is attached to the tip of the slanted plate by means of a support shaft 7 so as to be able to similarly swing up and down. A cylinder 8 that can swing the inclined plate base member 4 is interposed between the inclined plate base member 4 and the rear portion of the vehicle body 2. Further, a wheel 9 is pivotally supported at the tip of the inclined plate tip member 6, and a wheel 11 is pivotally supported at the tip of the inclined plate base member 4 via a swingable support rod 10.

Since the conventional device is as described above, the inclined plate base member 4 and the inclined plate tip member 6 are compressed by the contraction operation of the cylinder 8, as shown by the two-dot chain line in the figure.
When extending from the floor 3 to the ground A, if the inclined plate tip member 6 becomes almost perpendicular to the ground A, the inclined plate tip member 6 is no longer rotated around the support shaft 7, and both There is a possibility that the inclined plate members 4 and 6 cannot be extended any further.

This idea was devised in view of the above-mentioned circumstances, and its purpose is that when opening the cargo loading ramp, after the tip of the ramp tip member touches the ground, the tip of the ramp tip member touches the base of the ramp. To provide a cargo loading device for a truck in which an inclined plate tip member can be smoothly opened in front of an inclined plate base member without being bent directly below the inclined plate base member.

To achieve this purpose, the truck's cargo loading system rotates its proximal end to the rear end of the vehicle body near the rear end of the bed floor so that it can swing about a substantially horizontal axis. a tilted plate base member movably connected;
a tilted plate tip member whose proximal end is rotatably coupled to the tip of the tilted plate base member so as to be able to swing around a substantially horizontal axis; A telescopic cylinder is rotatably connected to the rear end of the vehicle body and the inclined plate base member, and a telescopic cylinder is arranged below the cylinder and rotates at both ends to the rear end of the vehicle body and the inclined plate tip member, respectively. and a telescoping rod which is freely connected. And, in this telescopic rod, just before the tip of the inclined plate tip member touches the ground, despite the minimum length of the extendable rod, the rotational connection point between the elastic rod and the inclined plate tip member is connected to the inclined plate base member and the inclined plate. The minimum length is set so that the position is farther from the rear end of the vehicle body in the horizontal direction than the rotational connection point with the tip member.

This invention will be explained in detail below based on the drawings.

FIG. 1 is a side view showing the rear part of a truck equipped with a device according to this invention. On the rear edge of 22, there is a plate-shaped uneven part 23 on both sides of the top surface to prevent slipping.
Inclined plate base member 24 (third
(shown in the figure) is mounted by a support shaft 25 so as to be swingable around a substantially horizontal axis. Inclined plate base member 24
At the tip of the slanted plate tip member 27 (shown in FIG. 2), which is similarly plate-shaped and has belt-shaped uneven parts 26 for preventing slipping on both sides of the upper surface, is attached to the tip of the slanted plate 27 (shown in FIG. 2). It is mounted so that it can swing around an axis. Contact portions 27a and 24a are formed at the base of the inclined plate tip member 27 and the tip of the inclined plate base member 24, respectively, so that the swinging of the inclined plate tip member 27 is an extension of the inclined plate base member 24. It is designed so that it can be stopped at any position. Wheels 30, 30 are pivotally supported on both sides of the tip of the inclined plate tip member 27 by support shafts 29, 29, respectively. Also,
The tip of a rod 33, which will be described later, is pin-coupled to the base end of the inclined plate tip member 27 by a support shaft 34.
The base end of the rod 33 is pin-coupled to the rear part of the vehicle body 20 by a support shaft 35, and the vehicle body 20,
The inclined plate base member 24, the inclined plate tip member 27, and the rod 33 constitute a four-section rotation link mechanism 36. Further, a support rod 3 whose base is pivotally supported by support shafts 37 on both sides of the tip of the inclined plate base member 24 is provided.
Wheels 40, 40 are pivotally supported by support shafts 39, 39 at the tips of the wheels 8, 38, respectively.

As shown in FIG. 4, the portion of the rod 33 that is supported by the support shaft 34 on the tip end member 27 of the inclined plate is formed of a cylindrical member 33a, and the cylindrical member 33a has a through hole 33b. is drilled, and the through hole 33b
A pin 33c is passed through. Further, the tip of a rod-shaped member 33d is inserted into and removed from the cylinder of the cylindrical member 33a, and is brought into contact with the pin 33c. Therefore, the rod 33 is telescopic,
The minimum length of the rod 33 is when the tip of the rod-like member 33d comes into contact with the pin 33c. Rod-shaped member 3
The base end portion 3d is pin-coupled to the rear part of the vehicle body by the support shaft 35.

Further, as shown in FIG. 1, arm members 41 and 42 for supporting the abutment device when it is folded are attached to both upper and rear portions of the vehicle body 20.

Further, a cylinder 45 is interposed between the inclined plate base member 24 and the rear portion of the vehicle main body 20, with both ends thereof being pivotally supported by support shafts 43 and 44, respectively.

Since the device according to this invention is as described above, the inclined plate base member 24 is swung upward by the extending action of the cylinder 45, and the four-bar rotation link mechanism 3
6 is also swung upward as a whole, and is supported by arm members 41 and 42 so that it can be folded, as shown in the X state in FIG. And arm members 41, 42
By releasing the support from the cylinder 45 and retracting the cylinder 45, the four-bar rotation link mechanism 36 is also swung downward as a whole as the inclined plate base member 24 is swung downward. As the inclined plate base member 24 swings from the vertical direction to the horizontal direction, the length of the rod 33 changes. The length of the rod 33 is the length of the rod-shaped member 33.
The rod 33 reaches its minimum when the tip of the tip d comes into contact with the pin 33c, and the rod 33 is tilted with the rod 33 just before the wheels 30, 30 at the tip of the tilt plate tip member 227 touch the ground, despite the minimum length of the rod 33. Support shaft 34 as a rotational connection point with plate tip member 27
The minimum length is set such that the position is farther from the vehicle body 20 in the horizontal direction than the support shaft 28 serving as the rotational connection point between the inclined plate base member 24 and the inclined plate tip member 27. Therefore, when the wheels 30, 30 touch the ground, the inclined plate tip member 27 is in a posture such that its lower end is farther from the rear end of the vehicle body 20 than its upper end, that is, the lower end of the inclined plate base member 24 is The inclination angle is such that it does not go directly below, and the wheels 30, 30 at the tip of the inclined plate tip member 27 run on the ground A in the direction away from the vehicle body 20 in response to the subsequent downward swing of the inclined plate base member 24. (Y state in FIG. 1), and finally the inclined plate base member 24 and the inclined plate tip member 27 continue from the floor part 22 to the ground A in almost a straight line, as shown in the Z state in FIG. 1. form a slope. The support rods 38, 38 are automatically folded by swinging when the cylinder 45 is extended, and are automatically extended when the cylinder 45 is retracted, so that they are in the Z state as shown in the Z state. The tip portion of the inclined plate base member 24 is supported.

As described above, the device according to the present invention solves the problems of the conventional device described above, and has the effect of allowing easier switching between the usage state and the folded state.

[Brief explanation of drawings]

Figures 1 to 3 are a side view showing the rear of a truck equipped with the device according to this invention, a rear view of a portion of the truck showing the device folded, and a portion of the truck showing the device stretched out. FIG. 4 is a plan view, FIG. 4 is a sectional view showing a rod that can be used in the device according to the invention, and FIG. 5 is a side view showing the rear of a truck using the conventional device. 20... Vehicle main body, 22... Floor, 24... Inclined plate base member, 25, 28, 34, 36... Support shaft,
27... Inclined plate tip member, 33... Rod, 45
……Cylinder.

Claims (1)

[Scope of utility model registration request] an inclined plate base member whose base end is rotatably connected to the rear end of the vehicle body near the rear end of the cargo bed floor so as to be swingable around a substantially horizontal axis; a tilted plate tip member whose base end is rotatably coupled to the tip of the tilted plate base member so as to be able to swing around the vehicle body; an extensible cylinder rotatably coupled to the rear end portion of the vehicle body and the inclined plate base member; and a telescopic cylinder arranged below the cylinder at both ends thereof, respectively, and the rear end portion and the inclined plate tip member of the vehicle body. a telescoping rod rotatably connected to the slanted plate, and the telescoping rod is configured such that, immediately before the tip of the inclined plate tip member touches the ground, the telescoping rod is connected to the slanted plate, despite the minimum length of the telescoping rod. and the inclined plate tip member are located at a position further from the rear end portion of the vehicle body in the horizontal direction than the rotational coupling point of the inclined plate base member and the inclined plate tip member, A truck cargo loading device characterized by having a minimum length.