JPH0527659Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rear door of a van-type vehicle. In particular, the door is foldably suspended in two from the upper frame at the rear of the cargo box, and the door can be opened upward by a cable using a combination of a hydraulic cylinder and a pulley.

The purposes of this invention are (1) to fold the door in two and pull it upward so that it does not get in the way of loading and unloading cargo; (3) To provide a vehicle door that can be opened and closed with a single switch.

To summarize the configuration of the present invention for achieving the above object, the upper door 6 is attached to the upper frame 3 of the rear opening 2 of the cargo box 1.
A is hinged, a lower door 6b is foldably hinged to the lower end of the upper door, and the door 6 has a door 6 which can be opened in an upwardly folded state, and the opening/closing device of the door 6 is ,
It consists of a hydraulic cylinder 9 whose base is pivotally supported by the upper frame 3, a fixed pulley 14 attached to the main body 9b side of the hydraulic cylinder 9, and two pulleys 12a and 12b attached to the tip of the rod 9a of the hydraulic cylinder 9. After a cable 15 having a certain length is wound around the movable pulley 12 and the fixed pulley 14 in a U-shape, the cable 15 is attached to the two pulleys 12a and 12 of the movable pulley, respectively.
After being wrapped around each of the wires, the wires are made to cross each other vertically, and one end is fixed to the upper door 6a side and the other end is fixed to the lower door 6b side.

A preferred embodiment of the above configuration will be described below with reference to the drawings.

FIG. 1 is a perspective view of a van-type vehicle, and FIG. 2 is an explanatory diagram of the opening/closing mechanism of the present invention. 1 is a cargo box of a van-type vehicle, 2 is a rear opening, and the opening is formed by an upper frame 3, a lower frame 4, and side frames 5, 5. Reference numeral 6 denotes a door that can be folded into two and is composed of an upper door 6a and a lower door 6b hinged to the upper frame 3, and the end of the upper door 6a is attached to the upper frame 3 with a hinge 8.

Reference numeral 9 denotes a hydraulic cylinder, the base of which is pivotally supported on the stepped portion 10 of the upper frame 3 by a pivot pin 11;
A two-stage pulley 12 (12a and 12b) is supported by a shaft 13 at the tip of the rod 9a at the other end. Furthermore, a fixed pulley 1 is attached to the head of the main body 9b of the hydraulic cylinder 9.
4 is installed. 15 is a rope, one end is 1
5a is fixed to the upper door 6a, and the other end 15b is fixed to the lower door 6b. The cable 15 has a certain length, and as shown in FIG. 3, the middle part is wound around the fixed pulley 14 in a U-shape, and the end parts cross each other via the movable pulley 12a and the movable pulley 12b. After letting
One end 15a is on the upper door 6a side and the other end 15b is on the lower door 6b side
They are attached to each side.

Now, if you use the door opening/closing device of this invention, the fourth
Opening and closing are performed along the trajectory shown in the figure. That is, in order to close the door 6, which opens upward as shown by the solid line in Fig. 2, the rod 9a of the hydraulic cylinder 9 is first retracted, and the rod 9a is wrapped around the movable pulley 12 at the end of the rod and the fixed pulley 14 at the cylinder head. Fixed length rope 15
Since the lower door 6b is hung, it is always in a tensioned state. The length between the pulley 12a and the fixed point 15a to the upper door 6a (reference numeral a in FIG. 2) is almost the same, but the length between the pulley 12b and the fixed end 15b of the lower door 6b (reference numeral a in FIG. 2) is almost the same. b) gradually expands, the bending angle θ between the upper door 6a and the lower door 6b gradually increases, and finally they descend to a vertical position and are closed (as shown by the two-dot chain line in FIG. 2).

At this time, the hydraulic cylinder 9 also assumes a substantially vertical position inside the upper door 6a as shown by the imaginary line in FIG. At the same time, the cable 15 also comes into contact with the inside of the door, and the pulley 12 also comes close to the pulley 14. Conversely, in order to open it, the rod 9a can be extended using the cylinder 9.

As described above, according to the present invention, the door is folded upward in half and pulled up, which is convenient because it does not get in the way of loading and unloading luggage. Furthermore, the door folded upward can be used as an eaves, making it suitable for cargo handling operations in rainy weather. Furthermore, the opening/closing mechanism has a simple structure and can be operated with a single switch operation of the hydraulic drive source, resulting in excellent operability.

[Brief explanation of the drawing]

FIG. 1 is a rear perspective view of a van-type vehicle equipped with the present invention. Figure 2 shows a rear door opening/closing device according to the present invention. FIG. 3 is a view taken along the - arrow in FIG. FIG. 4 is an explanatory diagram when the rear door is closed. In the figure, 1...packing box, 2...rear opening, 3
...Top frame, 4...Bottom frame, 5...Side frame, 6...
Door, 6a...upper door, 6b...lower door, 8...hinge,
9... Hydraulic cylinder, 9a... Rod, 10...
Stepped portion, 11... Pivot pin, 12... Moving pulley, 1
3... Axis, 14... Fixed pulley, 15... Cable, 1
6... Fixed pulley.

Claims (1)

[Scope of utility model registration request] The upper door 6a is hinged to the upper frame 3 of the rear opening 2 of the cargo box 1, and the lower door 6b is hinged to the lower end of the upper door so that it can be folded in two, so that it can be opened in an upwardly folded state. The opening/closing device for the door 6 includes a hydraulic cylinder 9 whose base is pivoted to the upper frame 3 and a fixed pulley 1 attached to the main body 9b side of the hydraulic cylinder 9.
4, a movable pulley 12 consisting of two pulleys 12a and 12b attached to the tip of the rod 9a of the hydraulic cylinder 9, and a cable 15 having a certain length wrapped around the fixed pulley 14 in a U-shape. , the cable 15
are wound around two pulleys 12a and 12b of a movable pulley, respectively, and then crossed vertically so that one end is fixed to the upper door 6a side and the other end is fixed to the lower door 6b side. rear door.