JPH0612157Y2 - Automatic shutter door opening / closing device for van type vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an automatic opening / closing device for a shutter door provided on the rear surface of a luggage box in a van type vehicle.

(Prior Art) Conventionally, the opening and closing device for the shutter door of a van-type vehicle has been actually
As disclosed in Japanese Patent No.-4524, there is a hoisting device above the door frame. This hoisting device is composed of springs and wire ropes provided on the left and right ends, and the spring force of the springs and the weight of the shutter door are weight-balanced via the wire rope to facilitate opening and closing of the shutter door. there were. In the shutter door having such a structure, even though the spring force and the own weight of the shutter door are balanced, the opening and closing operation of the shutter door is unexpectedly difficult because the weight of the shutter door is considerably large. .

In order to overcome this drawback, the applicant previously filed an application entitled “Electric shutter door opening / closing device for van type vehicle” (actual application Sho 60
-189016). The technology of this application allows the opening and closing of the shutter door to be automatically opened and closed by using a geared motor and a link chain, but the arrangement configuration of these devices is considerably limited. For example, there are problems that the link chains can be arranged only linearly or that a long output shaft is required.

(Problems to be solved by the invention) The present invention has been devised in view of the above-mentioned points, and enables the opening and closing of the shutter door to be opened and closed by using one rope, and further, the left and right ropes. It tries to be able to open and close in a well-balanced manner by always synchronizing.
Further, the present invention intends to enable driving by expanding and contracting a hydraulic cylinder so as to be suitable for a van type vehicle equipped with a hydraulic device as an opening / closing drive device.

(Solution by the Invention) A hydraulic cylinder 7 having a main body supported on a ceiling and a two-step pulley at a tip of a rod, rear pulleys 14 and 16 symmetrically attached to both ceilings above a gate, and a shutter. Door 2
Is stored in the ceiling and the shutter door 2 is fully opened,
Front pulleys 13 and 15 symmetrically attached to both sides of the ceiling portion further forward than the position of the uppermost panel 3a, and an intermediate pulley 17 also attached to the ceiling portion at the rear position of the two-stage pulley 9. 5 pulleys in total and one rope 12, one end of which is fixed to a first fixing piece 11 attached to the main body of the hydraulic cylinder 7 or the ceiling,
The upper sheave 9a, the front sheave 13 and the rear sheave 14 of the second sheave 9 are stretched diagonally forward to the other front sheave 9,
The other end is fixed to the second fixing piece 18 attached to the ceiling part from the lower pulley 9b of the two-step pulley 9 via the spring 19 via the other rear pulley 16 and the intermediate pulley 17, and the cord 12
The middle portion of the above was fixed by the fixtures 20 on both sides of the uppermost panel 3a in the state where the shutter door 2 was housed in the ceiling.

(Embodiment) Reference numeral 1 in FIG. 2 is a luggage box of a van type vehicle V, and 2 is a shutter door, which is opened and closed up and down to load and unload luggage. The shutter door 2 is composed of a plurality of panels 3 which are rotatably connected to each other at their upper and lower edges. Shutter door 2 is first
As shown in the figure, a plurality of rollers 4 ... Are attached to the left and right edges of the roller at longitudinal intervals. When the shutter door 2 is opened / closed, the rollers 4 ... 6 is an opening / closing device for the shutter door 2 of the present invention.

Details of the opening / closing device will be described with reference to FIG. 7
Is a hydraulic cylinder, the cylinder body of which is firmly supported by the ceiling joist 8 and the other end of the rod 7a has a two-step pulley 9 supported by a shaft 10. Reference numeral 11 is a first fixing piece of the cord 12 fixed to the cylinder 7. The fixing piece 11 does not necessarily need to be fixed to the hydraulic cylinder 7, and may be fixed to the joist 8 for example.

Now, the rope 12 whose one end is fixed to the fixed piece 11
Is wound around the upper sheave 9a of the second sheave 9 and the front sheave 13
Wrapped around. The position of the front pulley 13 is the shutter door 2
When it is completely housed in the ceiling, it is located at a position farther back than the edge of the uppermost panel 3a and is pivotally supported by a lateral joist of the ceiling (not shown).

The rope 12 is further wound around a rear pulley 14 axially supported on the ceiling side of the upper part of the gate frame body, and further from a front pulley 15 at a position symmetrical to the front pulley 13 diagonally forward and further rearward. It is wound around a rear pulley 16 which is in a symmetrical position with the pulley 14, and is wound around the lower pulley 9b of the above-mentioned two-step pulley 9 via an intermediate pulley 17 and is inverted, and then is reversed to a second fixing piece 18 via a coil spring 19. It is fixed and always stretched by spring force. The second fixing piece 18 is also fixed to a lateral joist material or the like on the ceiling (not shown).

Numeral 20 is a fixing tool for fixing the cord 12 to both sides of the uppermost panel 3a and transmitting the acting force of the cylinder 7 of the cord 12 to the shutter door 2.

The opening / closing device 6 is particularly effective in a van type vehicle having the shutter door 2 and having a hydraulic pressure generation source (for example, a vehicle having a tailgate lifter at the rear of the vehicle).

(Operation) When the shutter door 2 is completely open (Fig. 1),
Pressure oil is supplied to the cylinder 7 from a hydraulic pressure source, and the rod 7a
When retracted, the two-step pulley 9 retracts in the direction of the arrow together with the rod 7a. Then, the cord 12 moves as shown by the arrow. Therefore, the left and right cords 12a and 12b fixed to the uppermost panel 3a move rearward toward the gate as shown in the figure. As a result, the shutter door 2 is smoothly closed by being pushed by the uppermost panel 3a.

In particular, since at least one end of the cord 12 is always given a tension by an elastic body such as a spring 19, the motion of the cylinder 7 is accurately transmitted to the left and right parallel cords 12a and 12b, and these left and right cords are accurately transmitted. Articles 12a and 12b act in synchronism, are smoothly closed, and have no rattling on either side.

Conversely, when opening the shutter door 2, the hydraulic cylinder 7
When pressure oil is supplied to the rod 7a and the rod 7a is extended, a force acts in the direction opposite to the arrow in the figure, so that the left and right cords 12a and 12b act in synchronism, and a smooth release can be performed.

(Effect) 1) One end of the cord 12 is fixed to the first fixing piece 11 and the other end is fixed to the second fixing piece 18, and elasticity of a spring or the like is provided at a position near at least one of the fixing pieces. Since the end part is fixed through the body, the cord is always stretched,
The left and right parallel wire ropes 12a and 12b can be synchronized, and the shutter door can be opened and closed smoothly.

2) The opening / closing device may be provided with a dedicated hydraulic drive source, but in a vehicle equipped with a hydraulic drive source, such as a vehicle equipped with a tailgate lifter, the hydraulic drive source can also be used, which is advantageous in terms of cost. is there.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an automatic opening / closing device for an electric shutter door according to the present invention. FIG. 2 is a perspective view of a van-type vehicle equipped with a shutter door. FIG. 3 is a front view of the shutter door. In the figure; V ... Van type vehicle 1 ... Packing box, 2 ... Shutter door 3 ... Panel, 3a ... Top panel 4 ... Roller, 5 ... Guide rail 6 ... Opening / closing device, 7 ... Hydraulic cylinder 7a …… Rod, 8 …… Ceiling joist 9 …… Two-stage sheave, 9a …… Upper sheave 9b …… Lower sheave, 10 …… Axis 11 …… First fixed piece, 12 …… Rope 12a, 12b …… (Parallel on both sides of the ceiling) 13,15 …… Front pulley, 14,16 …… Rear pulley 17 …… Middle pulley, 18 …… Second fixing piece 19 …… Spring, 20… …Fixture

Claims (1)

[Scope of utility model registration request] 1. A hydraulic cylinder (7), the main body of which is supported on a ceiling, and a two-step pulley (9) at the tip of a rod, and a rear pulley (14) symmetrically attached to both ceilings above the gate. , 1
6) and the shutter door (2) is housed in the ceiling part, and when the shutter door (2) is fully opened, the front part symmetrically attached to both sides of the ceiling part further forward than the position of the uppermost panel (3a). Pulleys (13, 15) and intermediate pulleys (17) at the rear of the two-stage pulley (9), which are also attached to the ceiling, for a total of five pulleys, and one rope (12) One end of the cord (12) is fixed to a first fixing piece (11) attached to the main body of the hydraulic cylinder (7) or the ceiling portion, and the two-step pulley (9) is formed.
The upper sheave (9a), the front sheave (13) and the rear sheave (14) are stretched diagonally forward to the other front sheave (15), the other rear sheave (16) and the middle sheave (17). Via the lower pulley (9b) of the second pulley (9) via the spring (19) to the second fixing piece (18) attached to the ceiling, and the other end of the rope (12). An automatic opening / closing device for an electric shutter door in a van-type vehicle, characterized in that the parts are fixed to both sides of the uppermost panel (3a) in a state where the shutter door (2) is housed in the ceiling part, by fixing tools (20).