JPH0129959B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating lift door used in a garage facing a road, etc., and more specifically, to a so-called flip-up gate in a closed state. This invention relates to a rotating lift door that prevents a rotating lift door mechanism from being destroyed when an excessive pushing down force is applied to the door body, such as when a child rides on the main body part.

[Conventional technology] Conventionally, draw-type doors, double doors, etc. have been used for garages, open-air parking lots, etc. facing the road, but recently, such doors have been replaced with So-called flip-up gates have come into use because they are small, can double as gates, and are easy to open and close.

This flip-up type gate has the main body of the door almost upward.
It is a rotating lift door that opens by rotating 90 degrees, with the axis of rotation being a straight line that intersects a horizontal plane close to the ground surface and a vertical plane, and two pivot points arranged on this axis,
It has two support arms, one end of which is pivotally supported by these two pivot points, and which is rotatable within a plane intersecting the above-mentioned axes, and between the open end sides of these two support arms, the above-mentioned two It is constructed with a decorative board (door body) installed in a direction that crosses the book support arm, and the support arm is biased by a spring to cancel out the gravity on the rotating door side. The door opens and closes with a light operating force.

[Problem to be solved] When such a rotating lift door is actually installed and used in a garage, open-air parking lot, etc., the lower part of the door is in direct contact with the ground surface (concrete surface), etc.
It has been found that, apart from the rotary elevator door in an airtight state in which the door is completely closed, there are the following drawbacks in terms of stability and durability. That is, usually
From the viewpoint of opening/closing operations, a rotating lift door has a slight gap between the bottom of the door body and the ground surface when the door is closed (before the bottom end of the door touches the ground surface, the rotating part The other part comes into contact with a rigid structure from the ground surface, such as a stopper, and the door closing process is completed, thus forming a gap.)

Therefore, with a rotary lift door that has one-end support structure using a support arm, when the door is closed, for example, when a child gets on the door body, a strong external force is applied downward to the door body. Therefore, there is a risk that the above-mentioned rigid structure (stopper), support arm, etc. may be damaged. Furthermore, since such flip-up doors are used in general households, the above-mentioned situation can be said to be undesirable from the standpoint of safety.

The present invention is intended to solve the problems of the prior art, and aims to provide a rotating elevator door that has a simple structure, is durable, and has high safety.

[Means for Solving the Problems] A feature of the present invention is that when a strong pressing force is applied to the door body in the closed state, the door body is allowed to move further toward the ground surface and downward. It is constructed so that it rotates in two stages, including when it is closed.

Therefore, the configuration of the rotary lift door of the present invention to achieve the above object is such that the first downward stroke limit of the door body corresponds to the position of the door body when the door is closed, and the door body itself has a first downward stroke limit. A second downward stroke limit of the door body, which is provided below the first downward stroke limit, and whose downward rotation is prevented by contact with the ground surface or an object placed on the ground surface. When the door is in the closed state, the door body is positioned at the first downward stroke limit with an elastic body interposed, and the distortion of the elastic body causes the door body to move from the first downward stroke limit to the first downward stroke limit. The door body is allowed to move up to the downward stroke limit of 2.

[Function] In this way, when a strong downward force is applied to the door body from the outside at the first downward stroke limit in the normal closed state and in the door closed state, the door body descends toward the ground surface and A second downward stroke limit is provided in which the door body is brought into contact with the ground surface and receives a pressing force on the ground surface, and an elastic body is interposed so that the door body is positioned at the first downward stroke limit in the closed state. Even if a strong push-down force is applied, the door body can be moved to the second downward stroke limit and can receive it without applying destructive force to the rigid structure, support arm, etc. constituting the rotary lift door.

As a result, even if, for example, a child gets on the door body, the door body can receive the external force by contacting the ground, and the rigid structure and support arm that make up the rotating lift door will be cut off. There is no risk of damage, and a highly durable and safe rotating lift door can be realized.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of an embodiment to which the rotary lift door of the present invention is applied, FIG. 2 is a side view thereof, and FIG. 3 is a partial explanatory view of another embodiment.

In FIG. 1, S indicates the ground surface of an open-air parking lot, etc., and is formed by, for example, leveled soil or concrete poured on-site.

On this ground surface S, pillars 31 and 32 are erected at predetermined intervals corresponding to the width of the door 1, which is the door main body, with their lower parts buried. , 12 is the rotation axis of the rotary elevator door, which is formed as a straight line that intersects a horizontal plane close to the ground surface S and a vertical plane.

The two support arms 21 and 22 have their one ends 21a and 22a pivoted on two pivot points 11 and 12 arranged along the axis X, and rotate within a plane intersecting the axis X. It is free to move. The door 1 (door body) is fixed between the open ends 21b and 22b of these two support arms 21 and 22 in a direction intersecting these two support arms 21 and 22 in a straddling state.

2 is the door 1 and the two support arms 21, 2;
FIG. 1 shows a state in which the door is closed. This state is when the door 1 is located at the first downward stroke limit according to the present invention.

In this embodiment, two support arms 21, 22
An elastic body 7 is interposed at a position closer to the shaft fulcrums 11 and 12 than the central part. As shown in the figure, the elastic body 7 is made of a material that hardly bends even when the gravity of the rotating part 2 located ahead of it is applied to the elastic body 7, and the door cannot be opened by rotation. Or, it does not impair the function of the support arm for closure.

When the door is closed, that is, this rotating part 2
During the period from the open state to the first downward stroke limit (closed state), the door 1 receives a weak anti-gravity biasing force (in the direction of arrow a) through the support arm 21 due to the action of the spring 5. The door (rotating lift door) is closed and maintained in this state. This is the closed state shown in FIG.

In this closed state, if a strong pressing force is applied to the door 1 from the outside, for example, when a child hangs on the door 1 or steps on the door 1, the door 1
is rotated toward the second downward stroke limit position so as to be in the state shown by the dotted line in FIG. At this time, all or part of the rotating part 2 passes through the first downward stroke limit and reaches the second downward stroke limit, but during this time, the door 1 (or the rotating part 2 )
is subjected to a strong biasing force in the anti-gravity direction (in the direction of arrow a) due to the action of the elastic body 7. Then, the lower side of the door 1 comes into contact with the ground surface S via the absorbers 6, 6, and the door 1 reaches the second downward stroke limit and stops there.
At this time, the rotary lift door is prevented from being destroyed by the urging force of the elastic body 7 and the support of the door 1 by the ground surface S, and the two support arms 21 and 22 are also prevented from being broken.

In the figure, reference numerals 41 and 42 are stoppers integrated with the support column, and the spring 5 is biased in the anti-gravity direction (direction of arrow a) applied to the support arm 21 in order to reduce the weight of the rotating part 2. It acts as a biasing member. Further, the absorbers 6, 6 are shock absorbing members fixed to the lower side of the door 1 facing the ground surface S, and the elastic bodies 7, 7 are integrated with the support arms 21, 22 in the support arms 21, 22. It is an elastic body made of rubber, coil springs, elastic molded products, etc. that is interposed between the door and the door, and is a strong elastic member that hardly bends when the door is closed.

Now, normally, the side view when the door 1 is closed is as shown by the solid line in Figure 2 (the position of the rotating part 2 shown by the solid line is also the first downward stroke limit position). However, if it is assumed that there is no elastic body 7 in this state, if a child steps on the door 1, unexpected stress will be applied to each part, and the support arms 21, 22 will be damaged.
etc., there is a risk of damage. Therefore, the safety of the rotating lift door is a concern. In addition, because of the mechanical system in which external force is applied to members around the columns 31 and 32 due to the proportional relationship between the length of the arm and the pivot point, it is necessary to prevent the above-mentioned damage in the conventional configuration by This would require increasing the strength several times, which is not a good idea in terms of resources.

On the other hand, if a two-stage rotary elevator door is used that has a second downward stroke limit in addition to the first downward stroke limit as described above, an external force in a direction that reduces the gap G from the first downward stroke limit. , the elastic body 7 allows the transition to the state indicated by the dotted line in Figure 2 (second downward stroke limit) without any difficulty, and finally the absorbers 6, 6 under the door 1 (the absorbers themselves are not essential) ) will come into contact with the ground surface S, so the stress in each part will be reduced in stages. As a result, accidents such as cutting accidents can be prevented.

Note that the weak biasing force in the direction of arrow a while reaching the first downward stroke limit mentioned above refers to the weak biasing force in the direction of arrow a.
It refers to the urging force of , but according to estimates, it is weak, ranging from tens of kilograms to hundreds of kilograms. Also,
Elastic deformation of the elastic body 7 is caused by such a spring 5
The elastic body 7 is made of a material that is much more difficult to deform than the spring 5.

By the way, in the embodiment, the elastic body 7 is interposed between the support arms 21 and 22, but the door 1 can be deformed to eliminate the gap G from the first downward stroke limit.
It is also possible to adopt a configuration in which only the support arm 21 slides down. In addition, as shown in FIG. 3, the stopper 41 and the support arm 21
A strong washer 8 or the like may be placed between them, and the first downward stroke limit may be supported by the washer 8.
In this case, the spring 5 is hung on a portion of the arm 21 slightly ahead of the washer 8, and the support arms 21, 2
2 may be one support rod without intervening elastic body 7 as in the conventional case. Like the elastic body 7, the washer 8 is elastically deformed in a way that is compatible with the spring 5 and does not deform. Washer 8 is much more difficult to deform, and as before, it is made of rubber,
It is composed of springs, elastic molded parts, etc., and is a strong elastic member that hardly bends when the door is closed. Therefore, in normal door opening/closing operations,
For door 1, the state shown in Fig. 3 is the closed state,
The washer 8 is integral with the stopper 41, and in this case the washer 8 acts as a stopper without being deformed. That is, in this case, the washer 8 is not deformed by the force of the state in which it receives the door 1 in the closed state, so in the normal door opening/closing operation, the part up to the washer 8 is a stopper, and the extension of the stopper 41 It has become a part. This washer 8 is an elastic body 7
Similarly, when an unnecessarily large push-down force that destroys this rotary lifting mechanism is applied to the door 1 as an external force, it deforms, changing its state from the curved state shown in Fig. 3 to the flat direction, The door 1 is allowed to be in the state shown by the dotted line in FIG.

In any case, the other embodiments described above can be said to be mere design changes within the same technical scope.

Further, the second downward stroke limit state where the door 1 contacts the ground surface S may be achieved indirectly through the intervention of an object such as the absorber 6, or directly without the intervention of such an object. Of course, it may be anything. Therefore, in the present invention, the second downward stroke limit, in which the door body itself is prevented from rotating downward by coming into contact with the ground surface or an object disposed on the ground surface, has the above-mentioned limit. This includes both direct and indirect contact.

[Effects of the Invention] As can be understood from the above explanation, in the rotary lift door of the present invention, a strong pressing force is exerted at the first downward stroke limit in the normal closed state and in the door closed state. A second downward stroke limit is provided in which the door body lowers toward the ground surface when the force is applied to the door body, and a second downward stroke limit is provided in which the door body is brought into contact with the ground surface and receives a downward force on the ground surface, and the door body closes with an elastic body interposed. Since it is positioned at the first downward stroke limit of the state of formation,
Even if a strong push-down force is applied, the door body can be moved to the second downward stroke limit and can receive it without applying destructive force to the rigid structure, support arm, etc. constituting the rotary lift door.

As a result, even if an excessive external force is applied to the door body and it is pushed down, the door body can receive that external force by contacting the ground surface, and the rigid structure and support arm that make up the rotating lift door, etc. This eliminates the risk of breakage, making it possible to create a highly durable and safe revolving lift door.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the two-stage rotating lift door according to the present invention, Fig. 2 is a side view of the same, and Fig. 3 is a side view of the main parts near the stopper of another embodiment. . 1... Decorative board (door body), 11, 12... Axis fulcrum, 2... Rotating part, 41, 42... Stopper,
5... Spring, 6... Absorber, 7... Elastic body, 8... Washer, 31, 32... Support.

Claims (1)

[Claims] 1. A door body rotatably attached to a post erected on the ground via an arm, and a biasing member that acts directly or indirectly on the arm to bias the door body in an anti-gravity direction. , the door is opened by rotating the door body in a direction away from the ground surface, and the door is closed with the lower side of the door body adjacent to the ground surface, when the door is closed. a first downward stroke limit of the door body corresponding to the position of the door body in the state; and a downward rotation of the door body itself when it comes into contact with the ground surface or an object disposed on the ground surface. a second downward stroke limit of the door body provided below the first downward stroke limit, wherein the door body The door body is positioned at a first downward stroke limit in the intervening state, and the distortion of the elastic body allows movement of the door body from the first downward stroke limit to a second downward stroke limit. Rotating lift door.