JPH0366890A - Rotary lift door with shaft rising and falling - Google Patents

Abstract

PURPOSE:To reduce the operation force for opening and closing a door by detaining the top of a pantograph furnished in props with a support arm through a major revolving wheel and a minor revolving wheel, and thereby reducing the slide friction of the upper member with the lower. CONSTITUTION:A pantograph P is installed in props 31, 32, and the shaft elevating/sinking distance of a rotry elevating/sinking door is increased, and the height of door 1 at the door open limitation is increased. In this mechanism the bottom of the pantograph P is detained with the lower parts of lower members 31b, 32b of the props 31, 32, and also a lever Pa at the top is fitted so that it turns together with a major revolving wheel Q. Then a minor revolving wheel (q) coaxial with the bearing points 41, 42 is fixed to support arms 21, 22 and connected with the major revolving wheel Q through the transmission line. This reduces greatly the slide friction of the upper members 31a, 32a with lower members 31b, 32b generated at the time of expansion and contraction of the pantograph P.

Description

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

[Conventional technology]

A rotating lift door that uses a pantograph to increase the lift distance was proposed in Japanese Patent Application No. 1-42243, and the present application is an amendment 8 proposal to this.

[Problem to be solved by the invention]

The technical problem of the present invention is that the column is divided into upper and lower halves, and the apparent height of the column increases with the opening operation of the S. Conventionally, in a type of shaft-lifting/rotating lift door that is fully compatible with the above-mentioned situations, the sliding sm part between the upper and lower members of the support has been placed in a plane due to the relationship between the component forces of the forces acting on each point. The purpose is to avoid an increase in the sliding force between the upper member and the lower member (and thus the operating force for opening and closing the door), which would result in an extreme increase in pressure.

[Means and Embodiments for Solving the Problems] The structure of an embodiment of the shaft-lifting/rotating lift door according to the present invention will be described with reference to a drawing. One end of the support arms 21 and 22 is installed in the intersecting direction, and the other ends of the support arms 2 and 22 are arranged on one axis X perpendicular to the side boundary surface of the garage. When the above-mentioned 5i11 is lowered and the lii m main surface is vertical, the door is at the closing limit, and when the above-mentioned groove is raised and the door main surface is horizontal, the door is closed. In the rotary lift door that is designed to be
The lower member 31b is divided into two parts, and the upper member 31a is provided with the four shaft supports 42, and the lower member 31b is divided into two parts.
The upper member 31a is slidably attached to the lower member 3 in the longitudinal direction, and the upper member 31a is attached to the lower member 3.
A biasing member F in a direction further upward with respect to 1b and in a direction that counteracts the gravitational moment exerted by the rotating parts such as the doorwork and the support arm 21 with respect to the axis is attached to the rotating part. A load is loaded between the lower member 31b, and the support arms 21 and 22 have small openings @41t q fixed coaxially with the pivot points 41 and 42, and the rotation of the small rotation wheel q is controlled by the rotation of the small rotation wheel q. A large-mouth driving wheel Q, which is supported at a position below the shaft supports 41 and 42 and allowed to move only in the vertical direction with respect to the lower member 31b, is subjected to strong resistance against external forces in the direction of extension of the distance between the shafts of the transmission system. A pantograph P whose ends are knotted is engaged between the lower part of the lower member 31b and the large-mouth driving wheel Q, and the rod Pa at the upper end of the pantograph P is configured such that it is fixed to the large rotation @Q so as to rotate together with the large rotation wing Q. Note that a stopper that limits the rotational distance of the support arms 21 and 22 with respect to the axis X to approximately 90'' is not shown for the sake of clarity.

[Effect]

Since the present invention has the above structure, the support arms 21 and 22 are approximately horizontal at the door closing limit, and the small rotation wheel q is also rotated to the limit in the direction of the arrow a.

Therefore, the rod Pa of the pantograph P is horizontal, and as a result, the upper member 31a of the three pillars is forced to be deeply fitted into the lower member 31b, and the #l fulcrums 41 and 42 are the lowest. It is supposed to indicate the ground level.

When the matching groove 1 is operated in the direction of opening the door, the small rotation wheel q also begins to rotate in the same direction as the support arm 2 and 22 around the axis X, and as a result, the rod Pa of the pantograph P moves in the upright direction. Forced. In addition, it can be seen that the biasing force of the branch member F, whose apparent weight is reduced by 5i11, is increased due to the W/+iS construction of door 1, so overall, door 1
As the door opens, the ground height of Suke The door closing operation from the opening limit is the opposite of the above. In addition, large rotation @Q
Since the above-mentioned conditions cannot be satisfied if Q is movable in the horizontal direction with respect to the lower member 31b, the large-mouth driving wheel Q must be restrained so as to be able to freely rotate on a fixed vertical line with respect to the lower member 31b. G is the lower member 31 for this purpose.
This is a guide groove integrated with b. Also, the reason for distinguishing large and small rotating wheels is that small rotating wheels q can rotate 90 degrees, but large rotating wheels w
This is because the rotation angle of several degrees must be subtracted from the relationship between the structural members of the pantograph P. A simple example of this is a chain structure as shown in the figure. The chain is approximately straight as shown in the figure, and it seems that the tension of the chain does not produce any component force in the horizontal direction, so no surface pressure is produced at the sliding contact between the upper member 31a and the lower member 31b. It is possible to eliminate the problem of increased sliding friction and resistance due to the increase in surface pressure, which was present in the conventional example.

[Effects of the Invention] According to the present invention, the pantograph P and the support arms 21 and 22 are not directly engaged as in the conventional example, but are engaged through the small rotation wheel q and the six rotation wheels Q. Therefore, it is possible to obtain a shaft-elevating rotary elevating door in which the sliding friction between the upper member 31a and the lower member 31b is significantly reduced.

1・ 21　・　22　・ X・ 31　・　32　・ 31a ・32a 31b ・32b 41　・　42　・ F・ 1 Q・ P・ Pa　・ ・Door ・Support arm ·shaft ・Strut ・Top member ・Bottom member ・・Axis fulcrum ・Biasing member ・Small rotation wheel ・Large rotation wheel ·pantograph ・rod

[Brief explanation of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of the shaft-lifting/rotating door according to the present invention, and FIG. 2 is a f! FIG. 52 is a perspective view showing the internal structure of FIG. 51;

Claims (1)

[Claims] One end of each support arm is installed near the second side edge of the door in a direction intersecting the main surface of the door, and the other ends of the support arms are perpendicular to the garage side boundary surface. The door is supported by two shaft supports arranged on the first shaft, and when the door is lowered and the main surface of the door is vertical, it is at the closing limit, and when the door is raised and the main surface of the door is vertical, the door is at its closing limit. In a rotating elevator door that can only open when it is horizontal, the column that supports the pivot point relative to the ground is divided into two members, an upper member and a lower member, and the pivot support point is attached to the upper member. and the upper member is slidably fitted to the lower member in the longitudinal direction thereof, and the upper member is further upwardly relative to the lower member, the door; A biasing member in a direction that counteracts the gravitational moment exerted by a rotating part such as a support arm relative to the axis is loaded between the rotating part and the lower member, while the support arm is biased toward the axis. A small rotating wheel is fixed coaxially with the fulcrum,
The rotation of the small rotating wheel is caused by the rotation of the large rotating wheel, which is supported at a position below the shaft fulcrum and allowed to move only in the vertical direction relative to the lower member, in the direction in which the distance between the shafts of the transmission system increases. A pantograph whose ends are knotted is engaged between the lower part of the lower member and the large rotating wheel, and the upper end of the pantograph An axis-lifting/lowering rotary door, characterized in that the rod is fixed to the large rotating wheel so as to rotate together with the large rotating wheel.