JP2003129750A - Opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing device capable of simplifying a constitution to facilitate the installation and, at the same time, displaying a predetermined opening and closing function without being required for costly maintenance expenses. SOLUTION: In the opening and closing device for opening and closing an opening 2a allowing a fitting of a lifting and lowering floor 4a in a lift 4 set downward of a floor 2 formed in the floor 2 by opening and closing doors from the lower side of the floor 2, the opening and closing doors comprise two long and short plates 5 and 6 having distance from each other along the longitudinal direction in the opening 2a, at the same time, the two long and short opening and closing doors 5 and 6 are arranged along the longitudinal direction in the opening 2a at the lower side of the floor 2 and connected to guide rails 1 making a pair in the short direction in the opening 2a in a movable manner, and two long and short opening and closing doors 5 and 6 are connected to a pulling body 12 moved by a single driving source 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an opening / closing device which is provided on a stage floor of a theater and which opens and closes an opening for fitting the closing floor in a pressing place provided below the stage floor.

[0002]

2. Description of the Related Art For example, in many theaters, it is assumed that an abyssal device is provided in an abyss below the stage floor, which is a floor, to allow people and objects to pass between the abyss and the aisle. Therefore, it is said that the stage floor is formed with an opening into which the approaching floor, which is an ascending / descending floor, is fitted.

Therefore, when the stage floor has an opening for fitting the closing floor, it is important to block the opening appearing on the stage floor by an appropriate means when the closing floor is descending. Therefore, conventionally, there have been proposed various opening / closing devices for opening / closing the opening of the stage floor.

For example, in the proposal of swinging the two open / close doors 1 in the double door structure shown in FIG. 4 below the stage floor 2, the opening 2a can be opened / closed only by swinging the open / close door 1. However, since the opening / closing door 1 is required not to interfere with the pressing floor 3 in the lower pressing at the time of swinging, the opening 2 cannot be opened until the pressing floor 3 is lowered considerably.
There is a problem that a cannot be opened and closed.

On the other hand, in the proposal for closing the opening 2a by stretching the sheets 4 folded and stored on the lower side of the stage floor 2 shown in FIG.
As compared with the case of swinging, the opening 2a can be opened and closed by slightly lowering the approaching floor 3, but on the other hand, the opening 2a is opened.
As a becomes larger, the folding storage length of the sheets 4 also becomes larger, and thus it becomes difficult to ensure smooth stretching and folding storage of the sheets 4.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is not only to exhibit a predetermined function of opening and closing an opening but also to install it with a simple structure. It is an object of the present invention to provide a switchgear that is easy to use and can be used without enormous maintenance costs and is optimal for expecting improvement in its versatility.

[0007]

In order to achieve the above-mentioned object, the structure of the opening / closing device according to the present invention is provided with an opening which is formed in the floor and which allows fitting of the lifting floor in the lifting device arranged below the floor. An opening / closing device that opens and closes from the lower side of the floor by means of an opening / closing door, wherein the opening / closing door is composed of two sheets that are close to each other along the longitudinal direction of the opening, and the two opening / closing doors are on the lower side of the floor and open. Of the above-mentioned two opening / closing doors, which are movably connected to a pair of guide rails arranged along the longitudinal direction of the opening in the lateral direction of the opening, and which are moved by the drive of a single drive source. It is supposed to be connected to the body.

In the above structure, more specifically, in the case where it is not possible to secure a storage space of the same length that is sufficient to store each opening / closing door on the left and right sides of the opening, two sheets are provided. In the opening / closing door, it is preferable that the length of one opening / closing door in the moving direction is substantially double the length of the other opening / closing door in the moving direction.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments. The opening / closing device according to the present invention is embodied on the stage of a theater, and FIG.
As shown in FIG. 2, the opening 2a formed in the stage floor 2, which is the floor, is supposed to be opened / closed by opening / closing doors 5 and 6 composed of two long and short sheets.

By the way, as shown in FIGS. 4 and 5, the opening 2a has a so-called laterally long direction in which the left-right direction, which is the frontage direction, is the longitudinal direction in the stage floor 2 viewed from the passenger seat side which is the right side in each drawing. Is formed in.

The opening 2a is said to be closed when the closing floor 3 (see FIGS. 4 and 5) in the approach of the elevating device is raised to the maximum and fitted.

Regarding the approach, there are various proposals for means for raising and lowering the approach floor 3, but here, since the approach is not an essential part of the present invention, its detailed description is omitted.

By the way, the two long and short open / close doors 5 and 6 are located on the lower side of the stage floor 2 and are arranged along the longitudinal direction of the opening 2a to form a pair in the lateral direction of the opening 2a. It is assumed that the driving mechanism 10 allows the driving mechanism 10 to move farther from the left and right sides while being connected to each other.

The lengths of the two long and short open / close doors 5 and 6 are such that the horizontal length of the long open / close door 5 is almost double that of the short open / close door 6. When forming 5, for example, two short open / close doors 6
May be connected by an appropriate means to increase the length.

In this way, in the drawing, the opening and closing doors are composed of two long and short opening and closing doors 5 and 6 on the lower side of the stage floor 2 on the left and right sides of the opening 2a. It is the result of consideration to be suitable for implementation when it is not possible to secure a storage space of the same length that is sufficient to store the.

Therefore, although not shown, in the case where a storage space of the same length which is sufficient to store the respective opening / closing doors on the left and right sides of the opening 2a below the stage floor 2 can be secured, It suffices if the opening and closing doors are made to have the same length, and the opening and closing operation is performed by a driving means that is configured differently from the driving mechanism 10 described later and that does not realize double speed motion.

The two long and short open / close doors 5 and 6 are connected to a pair of guide rails 7. By this, the conventional open / close door 1 shown in FIG. 4 is constructed in a cantilever structure. In comparison with the above, since it has a so-called support structure on both sides, it can be expected that a large durability is exerted against the acting force from above.

Incidentally, although not shown, the pair of guide rails 7 are held in a fixed state on the back side of the stage floor 2 by appropriate means.

Further, in each of the open / close doors 5 and 6, connecting wheels 5a and 6a such as wheels held on both sides thereof are connected to the guide rail 7 under a so-called wheel removal preventing structure.
Each is movable with respect to the guide rail 7.

Further, the opening / closing doors 5 and 6 are basically
Great durability against the above-mentioned acting force, that is, as long as it has a predetermined mechanical strength,
It may be formed in any structure.

[0021] For example, in the case of forming a protective net form in which a wire net is stretched on a rectangular frame made of steel or the like, it is advantageous in that it can be expected to be lightweight and have strength, and that air permeability and visibility can be secured. Becomes

By the way, in this opening / closing device, the long and short two opening / closing doors 5 and 6 are driven to open / close by the drive mechanism 10. At this time, the driving mechanism 10 drives the short opening / closing door 6
It is assumed that the double speed motion in which the moving speed of the long open / close door 5 is doubled with respect to the moving speed of

The structure of the drive mechanism 10 for realizing this double speed motion will be described below. First, FIG.
As shown in FIG. 2, the long and short opening / closing doors 5 and 6 are the traction body 1 made of a wire or the like that is moved by the drive of a single drive source 11.
It is supposed to be connected to 2.

By the way, in the case of using the drive mechanism 10, the opening and closing doors 5, 6 of two long and short after opening the opening 2a.
As shown in a phantom diagram in the figure, each of them retreats to a position below the stage floor 2 and not exposed to the opening 2a.

First, the drive source 11 is arranged on the back side of the stage floor 2 or on the fixed side B such as the guide frame 7. Although not shown in detail, a winch with a speed reducer driven by an electric motor is provided. It consists of a towed body 12
Will be installed on this winch.

Although not shown, the drive source 11 may have a hydraulic motor in place of the electric motor, and the traction body 12 is also made of wire, although not shown in the figure. It may be made of a chain, in which case the drive source 11 is set to a structure having a sprocket for engaging the chain.

By the way, the above-mentioned tow body 12 is shown in the drawing, and has a first tow body 12a of two systems,
It is divided into a second traction body 12b and is linked to the drive source 11. The first traction body 12a moves the long open / close door 5, and the second traction body 12b moves the short open / close door 6. I am trying.

FIG. 3 shows a state in which the first tow body 12a and the second tow body 12b, which are the above-mentioned two systems, are wound around each other, which will be briefly described below.

That is, first, each of the towing bodies 12a, 12b.
Are respectively bent at so-called intermediate portions, that is, U-turned. At this time, the U-turned portion is connected to the fixed side B with the spring 13 interposed therebetween, and The occurrence of mischievous slack has been prevented in advance.

On the other hand, both ends of the first towing body 12a are connected to the long opening / closing door 5 with the interposition of the bracket 14, that is, rooted, and both ends of the second towing body 12b are turn buckles 15. It is connected to the fixed side B, that is, is rooted, while being connected so as to be so-called endless.

At this time, the intermediate portion of the second traction body 12b is separately interposed and bent by the two pulleys 16 held by the short opening / closing door 6, and the first traction body 12b is bent.
The number of folds is larger than that in a.

As a result, the first towing body 12a is driven by the drive source 1
When the moving amount per unit time of the drive source 11 is set to 1 by driving 1, the moving amount of the long open / close door 5 is 1:
On the other hand, in the second towing body 12b,
The moving amount of the short open / close door 6 is set to 1: 1/2, and therefore, the moving speed of the long open / close door 5 is doubled with respect to the moving speed of the short open / close door 6, that is, double speed motion is realized. Will be done.

By the way, the drive mechanism 10 constructed as described above operates as follows.

That is, assuming that the opening 2a formed by the doors 5 and 6 is open as shown in FIG. 3, and the drive source 11 is driven in one direction indicated by the arrow a in this state, the first pulling is performed. Body 12a in the direction indicated by arrow b,
The second towing bodies 12b will move in the directions indicated by arrows c.

As a result, the long open / close door 5 moves to the left in FIG. 3 and the short open / close door 6 moves to the right in FIG. 6
Will close the opening 2a.

Incidentally, the drive source 11
If is driven in the opposite direction, the opening / closing doors 5 and 6 open the opening 2a.

[0037]

As described above, according to the invention of claim 1, since the two opening / closing doors are connected to the pair of guide rails, the comparison is made when the opening / closing doors are constructed in a cantilever structure. As a result, a so-called double-sided support structure is provided, and it is possible to expect great durability against the acting force from above.

Further, since the two opening / closing doors move horizontally as they are along the guide rails, there is a risk that the sheets cannot be stretched or folded and stored smoothly when the sheets are folded and stored. Compared to some cases, smooth moving and withdrawal are facilitated.

According to the second aspect of the present invention, an embodiment is realized in which it is not possible to secure a storage space of the same length that is sufficient to store each opening / closing door on the left and right sides of the opening below the stage floor. Will be suitable for

As a result, according to the present invention, not only the predetermined opening / closing function is exhibited, but also the structure is simple and easy to install, and it can be used without enormous maintenance cost. It is ideal for expecting improvement in versatility.

[Brief description of drawings]

FIG. 1 is a vertical sectional view schematically showing a switchgear according to an embodiment of the present invention.

FIG. 2 is a plan view schematically showing the switchgear of FIG. 1 with the floor removed.

FIG. 3 is a perspective view schematically showing a drive mechanism.

FIG. 4 is a partial schematic perspective view showing an open / closed state of a conventional opening / closing door.

FIG. 5 is a diagram showing an open / closed state of a conventional open / close door, similar to FIG.

[Explanation of symbols]

2 stage floors 2a opening 3 Lifting floor in the approach of lifting equipment 5 long open / close door 5a, 6a Connecting wheel 6 short doors 7 Guide rail 10 Drive mechanism 11 Drive source 12 Towing body 12a First towing body 12b Second towing body 13 spring 14 bracket 15 turnbuckles 16 pulley B fixed side

Claims (2)

[Claims] 1. An opening / closing device which opens and closes an opening formed on a floor and allowing the installation of a lifting floor in a lifting device arranged below the floor from the lower side of the floor by an opening / closing door, wherein the opening / closing door has a longitudinal length in the opening. It consists of two sheets that are close to each other along the direction, and these two opening and closing doors are located on the lower side of the floor and are arranged along the longitudinal direction of the opening and move to a pair of guide rails in the lateral direction of the opening. An opening / closing device, which is operably connected to each other, and in which the two opening / closing doors are connected to a traction body that is driven by a single drive source. 2. The opening / closing device according to claim 1, wherein, in the two opening / closing doors, the length of one opening / closing door in the moving direction is substantially double the length of the other opening / closing door in the moving direction.