JPH0440516B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a rotating elevator door that has a simple structure, has improved durability, and is more compact.

The circular motion rotating lift door is already known from the Japanese Patent Publication No. 57-53507, but the biasing mechanism (a mechanism that biases the weight of the rotating parts including the decorative plate, i.e., the door and the support arm in the anti-gravity direction) Rainy weather waterproofing and the biasing mechanism,
There was a problem in that the space occupied by the support arm, including the support that fixed the pivot point of the support arm to the ground, was too large. According to the present invention, these problems can be solved all at once with a simple configuration.

The configuration of one embodiment of the rotating elevator door according to the present invention will be described with reference to a drawing. The pivot points 41 and 42 and the second pivot point 4
two support arms 21, 22 whose one ends 21a, 22a are pivotally supported by 1, 42 and are rotatable in a plane intersecting the axis X;
In the rotary lift door consisting of the door 1, which is installed across the open ends 21a, 22b of the above-mentioned two support arms 21, 22 in a direction intersecting with each other, the second cylinder is directly fixed to the ground surface S in the substantially vertical direction. A piston 5 is fitted into the upper part of at least one of the bodies 31 and 32, and a floating link 6 engages between the upper surface of the piston 5 and at least one of the support arms 21. The structure is characterized by applying a biasing force in the anti-gravity direction (vertically upward).
The biasing mechanism is indicated by 7 in the figure, but the biasing mechanism 7 can be any telescoping mechanism with opposing force, such as a general spring, gas spring, hydraulic pressure, or motor drive. be. Further, the pivot points 41 and 42 may be formed integrally with the cylinders 31 and 32, or may be formed from separate members and welded to the outer surface of the cylinders.

Since the present invention has the above configuration, the cylindrical body 3
1 can theoretically be made as small as the cross section of the biasing mechanism 7 can accommodate. For example, commercially available gas springs have an outer diameter of about 2.5 cm, so the inner diameter is 3 cm.
Even a circular tube of about cm can be used as the cylindrical body 31. In addition, rainwater is collected from the piston 5 (not limited to the cylinder,
It may be a polygonal prism or a gear shape. ), that is, the inner surface of the cylindrical body 31, there is less chance of direct contact with the biasing mechanism 7 at the bottom of the piston 5, which is effective in waterproofing and rust-proofing the biasing mechanism 7. The cylinder body 31 has a double structure of an outer cylinder and an inner cylinder, with the outer cylinder also serving as a support for integrally fixing the pivot point 41 and the ground surface S, and the inner cylinder having a piston mechanism. It may be an indirect mechanism that is configured in advance as a member and that the inner cylinder is inserted into the outer cylinder during construction.

As described above, according to the present invention, the support for fixing the shaft fulcrum 41 on the ground surface S is formed into the cylinder body 31, and the biasing mechanism 7 is placed inside the cylinder body 31.
Since it is possible to install the inside of the pillar and to make its diameter extremely small, the structure near the pillar can be made compact, making it convenient for vehicles etc. to enter and exit.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the rotary lift door according to the present invention, and FIGS. 2 and 3 are side sectional views of the door shown in FIG. 1 when it is closed and when it is opened, respectively. 1... Decorative board (door), 21, 22... Support arm, 31, 32... Cylindrical body, 41, 42... Axial fulcrum, 5... Piston, 6... Idling link, 7... Biasing mechanism.

Claims (1)

[Claims] 1 The axis of rotation is a straight line where the constant ground height and the vertical plane intersect, and two pivot points are arranged on the axis, and one end is pivoted to the two pivot points, and the axis intersects with the above axis. A rotary elevator door comprising two support arms that are rotatable in a plane and a decorative plate that is installed between the open ends of the two support arms in a direction intersecting the two support arms, A piston is fitted into the upper part of at least one of two cylindrical bodies directly or indirectly fixed to the ground surface in a substantially vertical direction, and the upper surface of the piston and at least one of the support arms are engaged by a floating link. In addition, the rotary lift door is characterized in that a biasing force in an anti-gravity direction is applied to the lower surface of the piston.