JPH0414240B2 - - Google Patents

Description

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

Prior Art The applicant of the present application has proposed a rotary lift door in which a biasing spring for reducing the gravity of the door is installed in or close to the support arm of the door, as disclosed in Japanese Patent Application No. 60-52767.
Although filed as Japanese Patent Application No. 60-62585, the present invention provides a separate embodiment in which the shape of the vicinity of the pivot point is improved to be more compact.

Problems to be Solved by the Invention In the above cited prior art invention, the biasing spring in the support arm swings in the transverse direction,
We have improved the shape of the support arm from being forced to have a thick or complicated shape (in the radial direction) due to the operating angle of the cooking rod, and have made the shape of the support arm more compact, making it easier to assemble. This is an attempt to simplify the process.

Means and Embodiments for Solving Problems The configuration of an embodiment of the rotating lift door according to the present invention will be described with reference to a drawing. Two shaft supports 41 and 42 arranged on the axis X;
42 with one end 21a, 22a being pivotally supported by the shaft
between the two support arms 21 and 22 which are rotatable in a plane intersecting with and the open ends 21b and 22b of the two support arms 21 and 22 in the direction intersecting with the two support arms 21 and 22. In the rotary lift door consisting of a decorative panel (door) 1 installed astride the pivot point, a biasing spring 51 is fitted into at least one of the support arms 21 along the longitudinal direction of the support arm 21, and A rack 61 that is slidable along the longitudinal direction of the support arm 21 is also fitted into one end 21a of the support arm near the support arm 41, and the one end 61a of the rack 61 is attached to the biasing spring for the rack 61. Proximal end 5 of 51
1a, and the teeth 6 of the rack 61.
1b is engaged with a pinion 71 which is coaxial with the shaft fulcrum 41 and cannot rotate with respect to the ground surface S. In addition,
The support arm 21 or the rack 61 limits rotation beyond the range when the door 1 is closed or opened.
81, 82 which come in contact with a stopper to limit the movement stroke. Also, the biasing spring 5
1 and the rack 61 may be either a direct engagement or an indirect engagement through washers, connecting rods, etc., which are common technical means for installing springs. The second digit of the code used in this specification is 2.
1 shows the left and right sides of the support arm system, some of which are not shown, but they appear identical to those of other systems.

Operation Since the present invention has the above configuration, when the support arm 21 is rotated from the open state of the door 1 shown in FIG. 2 to the closed state of the door 1 shown in FIG. The position changes and energy is stored in the biasing spring 51 (a compression spring in the example). Therefore, when the door is closed, door 1
Even the strong gravitational moment exhibited by can be reduced to an almost negligible degree. When the door 1 is opened, it is preferable to leave some mounting load to prevent the door 1 from falling by itself due to gusts of wind, etc.

Effects of the Invention According to the present invention, the pinion 71 and the rack 61 are commonly used as mechanical parts, have high strength and a small volume compared to other means, and can be assembled by engaging each other with simple work. This is advantageous in terms of assembly time (including the waterproof casing) and appearance of the rotating lift door.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the rotary lift door of the present invention, and FIGS. 2 and 3 are side sectional views of the main parts of the rotary lift door of FIG. 1 when the door is opened and closed, respectively. 1... Decorative board (door), 21, 22... Support arm, 21a, 22a... One end, 21b, 22b...
...Open end, 41, 42... Axis fulcrum, 51, 52...
...Biasing spring, 51a, 52c...end, 6
1a, 62a...One end of rack, 61b, 62b
...teeth, 71, 72...pinion, X...shaft,
S...Surface.

Claims (1)

[Claims] 1. The axis of rotation is a straight line where the constant ground surface height and the vertical plane intersect, and the second axis fulcrum is arranged on the axis,
Two support arms having one end pivoted on the two pivot points and rotatable in a plane intersecting the above-mentioned shafts; In the rotary lift door comprising a decorative plate installed across the direction, a biasing spring is fitted into at least one of the support arms along the longitudinal direction of the support arm, and the support arm near the pivot point is fitted with a biasing spring along the longitudinal direction of the support arm. a rack that is slidable along the longitudinal direction of the support arm is fitted into the support arm, one end of the rack engages with an end of the biasing spring on the proximal side of the rack; A rotary lift door characterized in that the teeth of the rack are engaged with a pinion that is coaxial with the shaft fulcrum and cannot rotate with respect to the ground surface.