JPH0158311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gate for an external structure such as a building, particularly a garage.

Conventional technology The rotary lift door using a weight was developed in 1973-29733.
It is known as No. 55-36717, etc.
The former has the disadvantage that the position of the weight moves on the plan view, increasing the chance of contact damage to objects on the ground, while the latter has a complicated configuration of combining multiple weights, but is not effective. The balance between the gravitational moment of the door (blocking frame) and the weight during the entire opening/closing process is not very good, and the operating force for opening/closing the door is far from light. It was hot.

Problems to be Solved by the Invention The technical problem of the present invention is to eliminate the above-mentioned conventional drawbacks and at the same time to reduce the chances of personal injury.

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. Two shaft fulcrums 41 and 42 arranged on the axis X, and the second shaft fulcrum 4
two support arms 21, 22 having one ends 21a, 22a pivotally supported by the two support arms 21, 22, which are rotatable over a range of approximately 90° in a plane intersecting the axis X; 41, 42 on the ground surface S, and the second support arm 2.
In a rotary lift door consisting of a decorative board (door) 1 installed between the open ends 21b and 22b of the two support arms 21 and 22 in a direction intersecting with the two support arms 21 and 22, one end of the cable K The rope body K is moored near the ends 21a and 22a of the support arms 21 and 22, and
is suspended along the pillars 31 and 32 via a pulley P arranged at approximately the height of the eaves, while the cable K
A weight W is suspended on the other end of the weight W.
The structure is characterized in that the inner or outer surfaces of the pillars 31 and 32 are slidably contacted and guided. In addition, 31a and 32a are hollow, P is a pulley, and the stopper which limits the rotation stroke of the support arms 21 and 22 over the range of 90 degrees from approximately horizontal to approximately vertical is shown in the figure for simplicity. Not shown. Also, the second digit 2 and 1 used in this specification indicate the left and right sides of the support arm system, respectively, and although some are not shown, they appear the same as those of other systems. .

Function Since the present invention has the above configuration, the position of one end of the cable K moored to the support arms 21 and 22 does not change drastically during the opening/closing process of the door 1 ( The mooring point at one end of the body K is near the pivot points 41 and 42). As a result,
The swinging of the cable K during the entire opening/closing process of the door 1 is considered to be minimal, so that there is little chance of injury or injury. The fact that the displacement during the entire stroke of opening and closing door 1 at the mooring point is small means that the weight W
This means that the amount of vertical elevation of
Because it does not involve any movement on the plan view (the weight W is attached to the column 3)
It is inscribed or circumscribed in 1 and 32. ), this can also be said to reduce the chance of failure during operation.

What is more important is the operating characteristics, and the present invention emphasizes that the gravitational moment of the door 1 and the moment in the opposite direction due to the constant weight W are well balanced during the entire stroke of opening and closing the door 1, and the operating force is light throughout the entire stroke. There must be. This is a major difference in operating principle between the conventional cited invention (Utility Model Publication No. 55-36717), which is based on the basic principle of changing the weight of the weight over time, and the present invention. There is.

Below, to explain the situation during this time mathematically, in the present invention, the total weight of the rotating parts at the center of gravity G of the rotating parts such as the door 1 and the support arm 21 is g, and the weight between the center of gravity G and the pivot points 41 and 42 is If the distance seen in the side view is L, the angle between the center of gravity G at the closing limit and the horizontal line when viewed from the pivot points 41 and 42 is α, and the opening angle from the closing limit is θ, then the gravitational moment M of the rotating part is M=gLcos(θ−α)...(1) On the other hand, the moment m in the opposite direction that the cable K exhibits with respect to the support arms 21 and 22 is the moment between the mooring point of the cable K and the pivot points 41 and 42. Assuming that the distance is l, the angle between the mooring point at the closing limit and the horizontal line when viewed from the pivot points 41 and 42 is β, and the weight of the weight W is w (the rope K has a small swing angle, so the entire opening and closing stroke ), m=wlcos(θ−β) ……(2) Comparing equations (1) and (2), α=β, gL=
As long as β, w, and l are selected and determined so that wl, the entire opening/closing stroke of door 1 becomes M=m, and theoretically it can be made so light that no operating force is required. I understand. Even though the technique of using a weight is common, the present invention has remarkable operating characteristics that are not found in the prior art.

The present invention is suitable for application to double-flow garages,
Hollow pillars of a carport can be used as they are as the pillars 31 and 32 of the present invention.

Other Examples The members on which the weight W slides and hangs are the pillars 31 and 32.
Although it is economically desirable to use
Of course, it is also possible to use the auxiliary pillar H attached to 32. Further, instead of being placed inside the supports 31 and 32, the weights W may be made hollow and may be in sliding contact with the outer circumferential surfaces of the supports 31 and 32 (FIG. 2).

Effects of the Invention In the present invention, the weight W is enclosed in the partition walls of the columns 31 and 32, or has a structure in which it slides on the surface of the columns 31 and 32 (auxiliary column H), so the appearance is compact. Therefore, the weight does not swing significantly. Therefore, there is an advantage that there is less chance of injury or injury. Moreover, the support arm 2 of the cable body K
Since the mooring points for the cables 1 and 22 are set near the pivot points 41 and 42, the swinging of the cable body K during opening and closing of the door 1 is small, and the chances of failure can also be reduced. Furthermore, by arranging the mooring point near the pivot point, the amount of movement of the weight is reduced, and the gravitational moment of the rotating part can be canceled out almost completely, so the operating force for opening and closing the door can be reduced. It has the advantage that the entire stroke can be made very light.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of one embodiment of a rotary lift door according to the present invention, and FIG. 2 is a perspective view of a main part of another embodiment. 1... Decorative board (door), 21, 22... Support arm, 21a, 22a... One end, 21b, 22b...
...Open end, 31, 32... Support, 31a, 32a
...Hollow, 41,42...Axis fulcrum, X...Axis, S
...Ground surface, H...Auxiliary pillar.

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,
a second support arm having one end pivoted on said two pivot points and rotatable over a range of approximately 90° within a plane intersecting said axis; and said second pivot support arm relative to the ground surface. In a rotary lift door consisting of two supporting columns and a decorative board installed between the open ends of the two support arms in a direction intersecting the two support arms, one end of the cable is The support arm is moored near one end of the support arm, and the cable is suspended along the support via a pulley placed approximately at the height of the eaves, while a weight is suspended from the other end of the cable. 1. A rotary lift door characterized in that the weight slides on and is guided by the inner or outer surface of the support column.