JPS62284882A - Support arm of rotary rising/falling 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 3. Detailed Description of the Invention Field of Industrial Application The present invention is applied to external gates for buildings, particularly garage doors.

BACKGROUND OF THE INVENTION In general, a rotating elevator door exhibits a strong gravitational moment because the door support arm relative to the fulcrum of rotation becomes a long horizontal arm when the door is closed. For this reason, means are provided to reduce the operating force for opening and closing the door by adding a counterbalancing moment (such as a spring as a biasing member). Compression (tension) as a biasing member
A spring or a weight is additionally engaged directly or via a connecting rod, cable, or the like. By the way, it would be good if the biasing force of the biasing member could be independently and variably adjusted within the biasing member, but there are some biasing members for which this is not necessarily possible, such as when the width of the decorative board (g) is cut or when the door has a different design. When replacing the door, there was a difference in the weight of the door, which could adversely affect the opening/closing operation of the door.

Problem to be Solved by the Invention It is an object of the present invention to provide a means for easily variably adjusting the biasing force in the anti-gravity direction at the construction site even if the weight of the door changes.

Means and Embodiments for Solving the Problems The configuration of an embodiment of the support arm of a rotating elevator door according to the present invention will be described with reference to a drawing. X, and the second axis fulcrum 41 disposed on the axis
42, and one end 21a, 22a at the two pivot points 41, 42.
two support arms 21 and 22 which are pivotally supported and are rotatable over a range of approximately 90° from approximately horizontal to approximately vertical within a plane intersecting the axis X;
・A decorative plate (It) 1 installed between the open ends of 22 in a direction intersecting the two support arms 21 and 22, and a stopper 51 that limits the rotational distance of the two support arms 21 and 22. 52 and biasing members 61 and 62 that provide a moment in the anti-gravity direction that counteracts the gravitational moment exhibited by the rotating parts such as the door 1 and the support arm 21. 22, it is slidable along the longitudinal direction of the support arm 22, and at any sliding position, for the entire outer periphery of the cross section of the support arm 22,
The structure is characterized in that a groove piece 7 which can be freely tightened is attached to the groove piece 7, and one point of action 62a of the biasing member 62 is engaged with the groove piece 7. In addition, when the biasing member 62 is not directly engaged, the point of action 62a is recognized as the end of an operational intervention such as a connecting rod or a cable. The groove piece 7 may be loosely fitted in a ring shape over the entire circumference of the support arm 22, and of course,
It is also possible to tighten (release) the longitudinal protrusions and grooves along the support arm 22 easily with a screw. In addition,
The second digit 2.1 used in this specification indicates the left and right sides of the support arm system, and although some are not shown, they appear identically to those of other systems.

Since the present invention has the above-mentioned structure, its function is clear and does not need to be explained in detail. Since the gravitational moment is reduced, the groove piece 7 may be loosened and slid slightly closer to the shaft fulcrum 42 in order to naturally reduce the moment exerted by the biasing member 62 on the axis X. If $1 becomes too heavy, you can do the opposite of the above. The ability to finely adjust moment balance in a stepless manner is a feature of the present invention.

Effects of the Invention According to the present invention, products (members) of the same configuration can be used for a wide range of weights, and advantageous economic effects can be expected.

[Brief explanation of drawings]

1121 is a perspective view of a main part of an embodiment in which a support arm according to the present invention is applied to a rotating elevator door, and FIG. 2 is an enlarged view of the vicinity of the support arm in FIG. 1. 1... Decorative board (door) 21, 22... Support arm 21a, 22a = one end 41, 42... Axis fulcrum 51, 52... φ stopper 61, 62... ...Biasing members 61a, 62a...Point of action 7...Groove piece X...Axis

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 within a plane over a range of approximately 90° from approximately horizontal to approximately vertical; and between the open ends of the two support arms;
A decorative board installed in a direction intersecting the second support arm, a stopper that limits the rotation stroke of the second support arm, and a stopper that counteracts the gravitational moment exerted by the rotating parts of the decorative board, support arm, etc. A rotary lift door comprising a biasing member that provides a moment in the anti-gravity direction, wherein at least one of the support arms is slidable along the longitudinal direction of the support arm, and at any position of the sliding movement, A sliding piece that can be tightened integrally is attached to all or a part of the cross-sectional outer circumference of the support arm, and one point of action of the biasing member is engaged with the sliding piece. A support arm for a rotating lift door.