JPH0156239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a rotary elevator door with simplified structural members and consideration for compactness.

Rotating elevator doors are already known from the Japanese Patent Publication No. 57-53507, but if a coil spring or gas spring is used as a biasing spring to reduce the weight of the decorative panel (door) and other rotating parts, the basic Due to its structure, it tends to be small in diameter and long in size. For this reason, the storage location of this type of biasing spring has conventionally been an obstacle to making the appearance more compact. In addition, since many of the pivoting parts have a relatively small diameter, the application of torsion springs and spiral springs poses difficulties in spring design and installation. The present invention improves these obstacles and also takes into consideration the productivity of the members.

The configuration of one embodiment of the present invention will be described with reference to a drawing. A straight line where a constant ground level and a vertical plane intersect is defined as an axis of rotation X, and two pivot points 4 are disposed on the axis
1 and 42, and two support arms 2 whose one ends 21a and 22a are pivotally supported by the two pivot points 41 and 42, respectively, and are rotatable in a plane intersecting the axis X.
1, 22, and the two support arms 21, 22 between the open ends 21b, 22b of the two support arms 21, 22.
22 and the door 1 installed in a direction intersecting with
The two pillars supporting the earth surface S are hollow cylinders 31 and 32 with a circular cross section, and the ends of the two hollow cylinders in a direction away from the earth surface are bent parallel to the earth surface. Circular cylindrical body 31a at the bending part,
32a, that is, the two support arms 21, 2
The structure is characterized in that two of the above-mentioned shaft supports 41 and 42 are used. Note that a stopper and the like that limit the rotation stroke of the rotation portion are not shown for the sake of clarity.

Since the present invention has the above-described structure, it is characterized in that the structure of the pivot points 41 and 42 is significantly simpler than the conventional structure. In other words, the conventional configuration of a pivot support point is based on the fixed idea that the pivot point (originally, a pivot point can be composed of either a male or a female member) must be a separate member from the support column. Insert a hole in the hole and fit a pin from a separate member into this hole, and use this pin to pivot a rotating part such as a door via a support arm.Weld the pin as a pivot point to the column and attach the support arm to this pin. pivot,
This involved a complicated process such as attaching the bearing part to the column by screwing. According to the present invention, since the columns 31 and 32 function as the pivot points 41 and 42 as they are, two members (the columns 31 and 32 and the pivot points 41 and 42) can be obtained at the same time with only a simple bending process. Even though they are actually two members, the cylinder body, which is a separate member from the support column and has somewhat different plate thicknesses and diameters, is indirectly connected to the support columns 31 and 32 using an L-shaped pipe joint or a well-known pipe connection technique. This can be considered as one pillar 31 (32) as a whole, and naturally falls within the technical scope of the present invention.

Although a conventional biasing mechanism such as a coil spring or a gas spring can be applied to the present invention, it is not as advantageous as using a torsion spring or a spiral spring. This is because, due to their original shape, torsion springs and spiral springs can be mounted with most of the occupied volume concentrated near the pivot point, and the circular cylinder body 31 at the bent portion
It is possible to house the biasing mechanism with an external configuration in which the diameters of a and 32a are slightly increased (because the diameter of the pivot point in the present invention is relatively larger than that of the prior art). It is obvious that the configuration of the present invention allows for a significantly simpler and more compact appearance.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of a rotary lift door according to an embodiment of the present invention, and FIG. 2 is a side view of a conventional rotary lift door. 1... Decorative board (door), 21, 22... Support arm, 31, 32... Hollow cylindrical body (post), 31a,
32a...Circular cylindrical body, 41, 42...Axis fulcrum, 5
...Biasing mechanism.

Claims (1)

[Claims] 1 The axis of rotation is a straight line that intersects the constant ground height and the vertical plane, and two shaft fulcrums are arranged on the axis, one end of which is supported by each of the two shaft fulcrums, and the shaft 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, The second pillar supporting each of the above two shaft supports to the ground surface is a hollow cylindrical body with a circular cross section, and the end of the two hollow cylindrical bodies in a direction away from the ground surface is directly or indirectly parallel to the ground surface. 1. A rotary lift door characterized in that the rotary lift door is bent at a angle, and the circular cylindrical body of the bent portion is used as the fulcrum of the two axes of the two support arms.