JPS62112891A - Revolving lifting door - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to external gates for buildings, particularly garage doors.

Conventional technology A proposal has been made in Japanese Patent Application No. 60-52767 to insert a biasing spring into the support arm of a rotating lift door, but the present invention further simplifies the structure. be.

The problem to be solved by the invention is to minimize the structural volume of the struts and pivot supports, and to simplify the structure through the use of flexible members, such as cables.

Means and Embodiments for Solving the Problems The configuration of an embodiment of the rotating lift door according to the present invention will be described with reference to a drawing. year,
One end 21 is attached to two shaft fulcrums 41 and 42 arranged on the axis
The above-mentioned A decorative board (II
Ji) In a rotary elevator door consisting of a rotary elevator door 1 and a stopper 61, 62 that limits the rotation stroke of the second support arm 21, 22 to a range of 90 degrees between a substantially horizontal direction and a substantially vertical direction, at least one A spring 51 is fitted into the support arm 21, and the end portion 51a of the spring 51 is flexibly extended and fixed to the cylindrical surface 41a of the pivot point 41, which is finally integrally connected to the ground surface. As the support arms 21 and 22 rotate from the door-closed position to the door-closed position, the end 51a of the spring 51 is tensed and biased and winds around the cylindrical surface 41a anew 174 times. The structure is characterized by the following. In addition,
31 and 32 are columns that support the shaft supports 41 and 42 on the ground, and the second digit of the code number 2 and l used in this specification indicates the left and right sides of the support arm system, and the columns that are not shown are There are some that are not present, but they appear identically to those of other systems.

Function Since the present invention has the above structure, the spring 51
When a tension spring is used as the spring, the end 51a of the spring near the pivot point 41 is tensioned and fixed to the cylindrical surface 41a as shown in FIG. 2(a) (when the door is opened). When the support arm 21 is rotated from the state shown in FIG. 2(a) to the state shown in FIG. 2(b) (when the door is closed), the end portion 51a of the spring is wound approximately 1/4 turn around the stationary cylindrical surface 41a. That will happen.

In this case, the end portion 51a is naturally required to be a flexible member such as a cable or a chain belt. Comparing Figures 2 (a) and (b), it is clear that (b) (7) Directional force 41 is tensilely biased by an amount corresponding to 1/4 circumference of the cylindrical surface of a, so the door l If the mounting load specifications for the spring 51 are determined in advance so as to offset the large gravitational moment exhibited when the door is closed, the door can be opened and closed without requiring special operating force. When a compression spring is used as the spring 51, the end of the spring 51 closer to the door is flexibly extended so that the end 51
It should be a.

Effects of the Invention According to the present invention, the cylindrical surface 41a can be used with the pivot point 41 as it is or with very little additional work, and the springs 51, 52 and the cylindrical surfaces 41a, 42a can be engaged with each other by cables or chain belts. Because it can be done easily and compactly, force transmission in a restricted space can be done easily and compactly. Therefore, the rotary lift door of the present invention can also be easily assembled and made compact. Further, the support members for the shaft supports 41 and 42 can be completely eliminated by using side walls, and even when using the supports 3] and 32, a slender structure can be achieved with only the support strength taken into consideration.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of a rotary elevator door according to the present invention, and FIGS. 2(a) and (b) are side sectional views of the main part when the door is opened and closed, respectively. 1... Decorative board (g) 21Φ22... Support arm 21aφ22a... One end 21b, 22b - Open end 414, 42... Axis fulcrum 41a or 42a, circular cylindrical surface 51, 52 ...Springs 51a, 52a, ends 61, 62, stopper X, shaft

Claims (1)

[Claims] The axis of rotation is a straight line that intersects a constant ground plane and a vertical plane, and two shaft fulcrums are arranged on the axis, and one end is pivotally supported by the two shaft fulcrums, and the shaft intersects with the above axis. between two support arms that are rotatable in a plane and open ends of the two support arms;
Rotation consisting of a decorative plate installed in a direction intersecting with the second support arm, and a stopper that limits the rotation stroke of the second support arm to a range of 90 degrees between a substantially horizontal direction and a substantially vertical direction. In the elevator door, a spring is inserted into at least one of the support arms, and an end of the spring is flexibly extended and fixed to a cylindrical surface of the pivot point that is finally integrally connected to the ground surface. As the support arm rotates from the open door position to the closed door position, the end of the spring is tensilely biased and the cylindrical surface is rotated to a new position.
/ A rotating lift door characterized by being wound around four times.