JP2003138843A - Opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation by simplifying a constitution, and fulfill a prescribed opening/closing function without the need for a huge maintenance cost. SOLUTION: An opening/closing device opens/closes an opening 2a, which is formed in a floor 2 and allows the fitting of an elevating floor 4a of an elevating device 4 disposed below the floor 2, from the lower side of the floor 2 by using opening/closing doors 5 and 6. The opening/closing doors 5 and 6 are composed of two laminated doors which move in one direction while being formed in the same length or approximately the same length along the longitudinal direction of the opening 2a. The doors 5 and 6 are movably tied to respective guide rails 7 and 8 which are located on the lower side of the floor 2, arranged along the longitudinal direction of the opening 2a, and paired in the lateral direction of the opening 2a. During the movement of one door 6, the other door 5 is moved while being interlocked with one door 6, or moved at a double speed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for opening / closing an opening provided on a stage floor of a theater and fitted to an approach floor provided below the stage floor. Regarding improvement. 2. Description of the Related Art In many theaters, for example, an abyss device that allows people and objects to move between the abyss and the stage floor is approached in the abyss below the stage floor. Therefore, it is stated that an opening is formed in the stage floor to fit the approach floor, which is an ascending and descending floor in the approach. Therefore, in the case where the floor is provided with an opening for fitting the floor, it is important to close the opening that appears on the stage floor by appropriate means when the floor is lowered. Therefore, various opening / closing devices for opening and closing the opening of the stage floor have been proposed. For example, in a proposal of swinging two doors 1 in a double-open mode shown in FIG. 5 below the stage floor 2, the opening 2a can be opened and closed only by swinging the door 1. However, since the door 1 is required not to interfere with the approach floor 3 in the downward approach at the time of swinging, the opening 2 must be opened after the approach floor 3 has descended considerably.
There is a problem that a cannot be opened and closed. On the other hand, in a proposal for closing the opening 2a by stretching the sheets 4 folded and stored below the stage floor 2 shown in FIG.
The opening 2a can be opened and closed if the approach floor 3 lowers even slightly, as compared with the case of the swing of
As a becomes larger, the folded storage length of the sheets 4 also increases, and therefore, there is a problem in that it is difficult to ensure smooth extension and folding storage of the sheets 4. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the purpose of not only performing a predetermined function of opening and closing an opening but also providing a simple configuration. It is an object of the present invention to provide an opening / closing device which can be easily used and can be used without requiring a huge maintenance cost, and which is optimal for expecting improvement in its versatility. [0007] In order to achieve the above-mentioned object, the structure of the switchgear according to the present invention is basically equivalent to a lift floor in a lift device formed on a floor and arranged below the floor. An opening / closing device for opening / closing an opening allowing a fitting from below the floor by an opening / closing door, wherein the opening / closing door is formed to have the same length or substantially the same length along the longitudinal direction of the opening in the same direction. The two open / close doors are disposed along the longitudinal direction of the opening on the lower side of the floor and are paired in the short direction of the opening. It is assumed that the two doors are movably connected, and one of the two doors moves together or moves at double speed when one of the two doors moves. In the above configuration, more specifically, one of the two doors is provided with:
Alternatively, it is assumed that a towing body that moves by driving a single drive source is connected to both. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on the illustrated embodiment. The opening and closing device according to the present invention is supposed to be embodied on a stage in a theater, and FIG.
As shown in FIG. 2, the opening 2a formed in the stage floor 2, which is a floor, is opened and closed by two upper and lower opening and closing doors 5, 6. Incidentally, as shown in FIGS. 5 and 6, the opening 2a has a so-called horizontal shape in which the left-right direction as the frontage direction is the longitudinal direction on the stage floor 2 viewed from the customer seat side on the right side in each figure. Is formed. The opening 2a is also closed when the approach floor 3 (see FIGS. 5 and 6) in the approach as a lifting device is fitted at the highest position. In the approach, various proposals have been made particularly for means for raising and lowering the approach floor 3, but here,
Since the approach is not an essential part of the present invention, a detailed description thereof will be omitted. The upper and lower doors 5 and 6 are located below the stage floor 2 and are arranged along the longitudinal direction of the opening 2a. While being connected to the guide rails 7 and 8, the drive mechanism 10 moves in the left and right directions in FIG. 1 and FIG. At this time, the two upper and lower doors 5, 6 are formed to have the same length or almost the same length in the longitudinal direction of the opening 2a, and to be in the same direction as the longitudinal direction of the opening 2a. It is said that it consists of two sheets that move and are stacked. By the way, the upper and lower doors 5, 6 are in a completely laminated state, as shown by phantom diagrams in FIGS. 1 and 2, so that each of them is retreated so as to open the opening 2a. It is at the time of storage. In this way, in the drawing, the two doors 5 and 6 are particularly stacked when they are stored in the lower part of the stage floor 2 and at one of the left and right sides of the opening 2a. This is a result of consideration for being suitable for realization when a storage space sufficient to store the doors 5 and 6 on one side cannot be secured. Each of the doors 5, 6 is connected to a pair of guide rails 7, 8, respectively, whereby the conventional door 1 shown in FIG. 5 has a cantilever structure. In comparison with the above, a so-called double-sided support structure is provided, so that a large durability can be expected against the acting force from above. Although not shown, the guide rails 7 and 8 are fixed to the back side of the stage floor 2 by appropriate means. Each of the doors 5, 6 is connected to corresponding guide rails 7, 8 by connecting wheels 5a, 6a such as wheels held on both sides thereof under a so-called derailing preventing structure. , Can be moved with respect to the respective guide rails 7 and 8. Furthermore, each of the doors 5, 6 is basically
It can exert a great durability against the above acting force, that is, as long as it has a predetermined mechanical strength,
It may be formed in any structure. At this time, each of the doors 5 and 6 is, for example,
When formed in a protective net form in which a wire net is stretched on a rectangular frame made of a steel material or the like, it is advantageous in that it can be expected to be lightweight and strong, and also to ensure ventilation and visibility. By the way, in this opening / closing device, the two opening / closing doors 5, 6 are vertically moved by the driving mechanism 10.
At this time, the driving mechanism 10 is moved by the upper opening / closing door 5 as the other upper opening / closing door 6 and the amount of movement of the lower opening / closing door 6 is increased. It is said to be approximately twice the amount of movement in. Although various proposals have been made as a configuration for realizing this dragging movement, in the present invention, the lower opening / closing door 6 projects upward from the rear end, which is the left end in FIG. The provided locking body 6b is configured to be connected to the front and rear ends, which are the left and right ends in FIG. As a result, for example, when the lower opening / closing door 6 moves leftward in the drawing by approximately its length from the state shown in FIG. 1, the locking member 6 b moves to the rear end on the lower surface side of the upper opening / closing door 5. After that, the upper opening / closing door 5 and the lower opening / closing door 6 both move leftward in the drawing. When this left row is continued, as shown by the phantom diagram in the figure, the two doors 5, 6 are stored in a vertically stacked state. By the way, from the state shown by the phantom line diagram in FIG. 1, when the lower opening / closing door 6 goes rightward in the figure by almost the length thereof, the locking member 6b is moved to the lower surface side of the upper opening / closing door 5. The upper door 5 is locked together with the front end, and thereafter the upper door 5 and the lower door 6 together move rightward in the figure, and this rightward movement is continued, as shown by the solid line in the figure. Then, the opening 2a is closed by the two doors 5,6. As described above, by setting the upper door 6 to move together with the lower door 6 when the lower door 6 moves, the upper and lower two doors 5 and 6 can be driven by a single drive source. 1
1, the two doors 5, 6 can be stored in a stacked state on either one of the left and right sides of the opening 2a, as described above. In the following, the structure of the driving mechanism 10 for realizing this dragging movement will be described.
As shown in FIG. 2, the upper and lower two doors 5 and 6 are connected to a towing body 12 made of a wire or the like that moves when driven by a single drive source 11. The drive source 11 is arranged on the back side of the stage floor 2 and on the fixed side B such as the guide frames 7 and 8. Although not shown in detail, a winch with a speed reducer driven by an electric motor is provided. And the towing body 12
Says that this winch is interposed. Although not shown, the drive source 11 may include a hydraulic motor in place of the electric motor, and the towing body 12 is formed of a wire instead of a wire, not shown. The drive source 11 may be configured to have a sprocket that meshes with the chain. By the way, as shown in FIG. 3, the above-mentioned towing body 12 has an intermediate portion held on the above-mentioned driving source 11 and a fixed side B arranged at an appropriate distance from the driving source 11. The movable pulley 14 is interposed between the fixed pulley 13 (see FIG. 2) and disposed between the drive source 11 and the fixed pulley 13 and connected to the lower opening / closing door 6.
(See FIG. 1). Incidentally, both ends of the towing body 12 are connected to the fixed side B under the intervention of a tension adjusting means 15 such as a spring or the like, so that the occurrence of unnecessarily loosening in the towing body 12 is prevented in advance. Incidentally, the driving mechanism 10 configured as described above operates as follows. That is, the place shown in FIG.
6, the drive source 11 is driven in one direction indicated by an arrow, and the towing body 12 moves in the directions indicated by arrows a, a1, a2, and a3 in the figure. Will do. Therefore, the movable pulley 14 connected to the lower opening / closing door 6 on which the towing body 12 is interposed moves leftward as shown by the arrow b in FIG.
The door 6 opens the opening 2a. The opening operation of the lower opening / closing door 6 causes the upper opening / closing door 5 to move together, thereby opening the opening 2a together with the lower opening / closing door 6. Incidentally, the driving source 11
Is driven in the reverse direction, the doors 5, 6 close the opening 2a during the accompanying movement. On the other hand, as described above, the upper door 5 constituting the opening / closing device according to the present invention moves along with the lower door 6 when the lower door 6 moves. In this case, the opening and closing doors 5 and 6 constituting the opening and closing device may move at double speed. That is, as shown in FIG. 4, if attention is paid only to the movement of each of the doors 5, 6, when the lower door 6 moves, the upper door 5 also moves, that is, the accompanying movement. Although it can be recognized that it is doing, it is substantially configured to perform a double speed motion. That is, in the place shown in FIG. 4, the movable pulley 14 held by the lower opening / closing door 6
And the towing body 12 is interposed and connected to the vehicle, while the towing body 12 is connected to the upper door 5. At this time, as shown in the figure, a connecting bracket 5b is connected to the upper opening / closing door 5, and the towing body 12 is connected to the connecting bracket 5b by a connecting portion indicated by reference numeral 5c in the drawing. It is going to be combined. Then, the pulling body 12 by the connecting portion 5c
Is realized at a portion after the towing body 12 extending from the driving source 11 is wound around the fixed pulley 13 and is so-called bent. Further, it is assumed that the towing body 12 after being bent is further wound around the movable pulley 14, and therefore, the moving speed of the movable pulley 14 does not correspond to the moving speed of the connecting bracket 5 b. The moving speed is doubled, and the upper door 5 moves at double speed with respect to the lower door 6. Therefore, when the upper door 5 moves at a double speed relative to the lower door 6, the two doors 5 and 6 move forward or backward at the same time. As compared with the embodiment shown in FIG. 3, a smooth impression opening / closing operation can be realized. By the way, in the place shown in FIG.
When the towing body 12 moves in the opposite direction to that shown in FIG. 3, the opening 2a is closed or opened. As described above, according to the present invention, since the two doors are connected to the pair of guide rails, the doors are configured in a cantilever structure. Compared to the case, a so-called double-sided support structure is provided, and it is possible to expect a large durability against an acting force from above. Further, since the two doors move horizontally along the guide rails as they are, when the sheets are stored in a folded state, there is a concern that the sheets may not be smoothly stretched or folded. Smooth moving drawers and retracts are easier than in certain cases. By setting one of the doors to move together with the other when the one door is moved, the upper and lower two doors can be moved by driving a single drive source. Even if it is not possible to secure enough storage space on the lower side of the stage floor to accommodate the door on either side of the opening, the two doors can be placed on either side of the opening. Can be stored in a stacked state. When one of the doors moves at a double speed relative to the other door, the two doors move forward or backward at the same time. Can be realized. As a result, according to the present invention, not only a predetermined opening / closing function can be exhibited, but also a simple structure can be used to facilitate installation, and it can be used without a huge maintenance cost. This is ideal for expecting improved versatility.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view schematically showing a switchgear according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the opening / closing device of FIG. 1 with a floor removed. FIG. 3 is a perspective view schematically showing a driving mechanism. FIG. 4 is a view showing a driving mechanism according to another embodiment, similarly to FIG. 3; FIG. 5 is a partial schematic perspective view showing an open / close state of a conventional open / close door. FIG. 6 is a view showing the open / closed state of a conventional open / close door, similarly to FIG. [Description of Signs] 2 Stage floor 2a Opening 3 Elevating floor approaching elevator 5,5 Opening door 5a, 6a Linking ring 5b Connecting bracket 5c Joint 6b Locking member 7,8 Guide rail 10 Mechanism 11 Drive source 12 Towing body 12a First towing body 12b Second towing body 13 Spring 14 Bracket 15 Turnbuckle 16 Pulley B Fixed side

Claims (1)

Claims: 1. An opening / closing device for opening and closing an opening for allowing fitting of an elevating floor in an elevating device formed on a floor and provided below the floor with an opening / closing door from a lower side of the floor. The opening / closing doors are formed to have the same length or almost the same length in the longitudinal direction at the opening, and move in the same direction as the longitudinal direction at the opening. Is arranged along the longitudinal direction of the opening at the lower side of the opening and is movably connected to each pair of guide rails in the short direction of the opening, and one of the two opening and closing doors The opening / closing device characterized in that the other opening / closing door moves together or moves at a double speed when the door is moved.