JP3781997B2 - Switchgear - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of an opening / closing device that opens and closes an opening that is provided on a stage floor of a theater and is fitted below the stage floor.
[0002]
[Prior art and its problems]
For example, in many theaters, an abyss below the stage floor, which is the floor, is equipped with a lifting device that allows people and goods to pass between the abyss and the stage floor. Is said to be formed with an opening for fitting an approaching floor that is an elevating floor in the approaching.
[0003]
Therefore, in the case of having an opening for fitting the approaching floor to the stage floor, it is important to close the opening appearing on the stage floor with an appropriate means when the approaching floor is descending, Conventionally, various open / close devices for opening / closing the opening of the stage floor have been proposed.
[0004]
For example, in the proposal of swinging the two doors 1 having the double doors shown in FIG. 4 on the lower side of the stage floor 2, the opening 2 a can be opened and closed only by swinging the door 1. However, when the swing door swings, it is required that the door 1 does not interfere with the approaching floor 3 in the downward approach, so that the opening 2a cannot be opened or closed unless the approaching floor 3 is considerably lowered. There is.
[0005]
On the other hand, in the proposal for closing the opening 2a by extending the sheets 4 folded and housed on the lower side of the stage floor 2 shown in FIG. Thus, the opening 2a can be opened and closed if the approaching floor 3 is lowered even slightly. On the other hand, as the opening 2a becomes larger, the folding storage length of the sheets 4 becomes larger. There is a problem that it is difficult to ensure smooth stretching and folding of the sheets 4.
[0006]
The present invention was devised in view of the above-described circumstances, and its purpose is not only to exhibit a predetermined function of opening and closing the opening, but also to facilitate installation with a simple configuration. In addition, it is an object to provide an opening / closing device that can be used without requiring enormous maintenance costs and is optimal for expecting an improvement in its versatility.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the means of the present invention is an opening / closing device that opens and closes an opening formed in a floor from the lower side of the floor by an opening / closing door, and is long on both sides of the opening on the lower side of the floor. A pair of guide rails arranged along the direction, two open / close doors movably connected to the guide rails via connecting wheels, and a drive mechanism for opening / closing the two open / close doors. The door is composed of a short door that moves in opposite directions and a door that is twice as long as the short door, and the drive mechanism is linked to a single drive source and the drive source. The first pulling body and the second pulling body that move the long opening door and the short opening door in opposite directions, respectively, and when the driving source is driven, the first pulling body and the long opening door The speed of movement is the second puller and the short opening and closing And it is characterized in that it is set to twice the moving speed.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
The opening / closing apparatus of the present invention is embodied on a stage in a theater, and as shown in FIGS. 1 and 2, an opening 2a formed on a stage floor 2 as a floor is opened and closed from the lower side of the floor. 5 is an opening / closing device that opens and closes.
The opening / closing device includes a pair of guide rails 7, 7 disposed along the longitudinal direction on both sides of the opening 2 a on the lower side of the floor, and a ring 5 a linked to the guide rails 7, 7. , and two door 5,6 which is movably interlocking respectively through 6 a, in which a driving mechanism 10 for opening and closing the two door 5,6. Further, the two opening / closing doors 5 and 6 are composed of a short opening / closing door 6 that moves in the opposite direction to each other and a long opening / closing door 5 that is twice as long as the short opening / closing door 6, and the drive mechanism 10 is simply configured. composed of a first driving source 11, the first traction member 12 a and the second traction member 12b for moving the short opening and closing door 6 and the long door 5 respectively are interlocking to the drive source 11 in opposite directions is doing. Furthermore, when the drive source 10 is driven, the moving speed of the first pulling body 12 a and the long opening / closing door 5 is set to twice the moving speed of the second pulling body 12 b and the short opening / closing door 6. It is characterized by that.
This will be described in more detail below.
[0010]
Incidentally, as shown in FIGS. 4 and 5, the opening 2a is formed in a so-called horizontally long shape in which the left-right direction as the frontage direction is the longitudinal direction on the stage floor 2 viewed from the passenger seat side on the right side in each drawing. ing.
[0011]
And this opening 2a is supposed to be closed even if the loosing floor 3 (see FIGS. 4 and 5) in the looming as an elevating device is mounted at the highest position.
[0012]
As for the approach, various proposals have been made for means for raising and lowering the approach floor 3, but here, since the approach is not a main part of the present invention, a detailed description thereof is omitted.
[0013]
By the way, the two open / close doors 5 and 6 are on the lower side of the stage floor 2 and are arranged along the longitudinal direction in the opening 2a and are connected to a pair of guide rails 7 in the short direction in the opening 2a. However, it is assumed that the drive mechanism 10 is closer to the left and right sides in FIG. 1 and FIG.
[0014]
The length of the two open / close doors 5 and 6 is set such that the horizontal length of the long open / close door 5 is approximately double the horizontal length of the short open / close door 6. In doing so, for example, the two short opening / closing doors 6 may be connected to each other by an appropriate means to make them longer.
[0015]
As described above, the open / close door is composed of the two open / close doors 5 and 6 as shown in the drawing, and the open / close doors are stored on the lower side of the stage floor 2 and on the left and right sides of the opening 2a. This is a result of consideration so as to be suitable for realization when a storage space of the same length sufficient for the above cannot be secured.
[0016]
Therefore, although not shown in the drawing, when it is possible to secure a storage space of the same length enough to store the doors on the left and right sides of the opening 2a on the lower side of the stage floor 2, It is sufficient that the length is the same and the opening / closing operation is performed by a driving means that does not realize a double speed motion and has a configuration different from that of the driving mechanism 10 described later.
[0017]
The two open / close doors 5 and 6 are connected to a pair of guide rails 7, whereby the conventional open / close door 1 shown in FIG. 4 has a cantilever structure. Compared to the above, since it becomes a so-called support structure on both sides, it can be expected to exhibit a great durability against the acting force from above.
[0018]
Incidentally, although not shown, the pair of guide rails 7 is held in a fixed state on the back side of the stage floor 2 by an appropriate means.
[0019]
Each of the open / close doors 5 and 6 is connected to the guide rails 7 by connecting the connecting wheels 5a and 6a such as wheels held on both sides thereof to the guide rails 7 under a so-called anti-derailing structure. It is possible to move.
[0020]
Furthermore, each of the open / close doors 5 and 6 is basically formed in an arbitrary structure as long as it can exhibit a large durability against the above-described action force from above, that is, as long as it has a predetermined mechanical strength. Good.
[0021]
For example, when the protective net is formed in a rectangular frame made of steel or the like, a metal net is stretched, it is advantageous in that the weight can be reduced, strength can be expected, and air permeability and visibility can be secured.
[0022]
By the way, in this opening / closing device, the two open / close doors 5 and 6 are driven to open and close by the drive mechanism 10. At this time, the drive mechanism 10 is adapted to the moving speed of the short open / close door 6. It is assumed that a double speed movement that doubles the moving speed of the long door 5 is realized.
[0023]
In the following, the configuration of the drive mechanism 10 that realizes this double speed motion will be described. First, as shown in FIG. 2, the two long and short doors 5 and 6 are driven by a single drive source 11. It is said that it is connected to the pulling body 12 made of a wire or the like that moves.
[0024]
Incidentally, in the case of this drive mechanism 10, the two long and short open / close doors 5 and 6 after opening the opening 2a are respectively below the stage floor 2 as shown by a virtual diagram in the figure. In addition, it is assumed that the valve is retracted to a position where it is not exposed to the opening 2a.
[0025]
First, the drive source 11 is disposed on the back side of the stage floor 2 and the fixed side B such as the guide frame 7 and is not shown in detail, but is composed of a winch with a speed reducer driven by an electric motor. The tow body 12 is assumed to be interposed in the winch.
[0026]
Although not shown, the drive source 11 may have a hydraulic motor instead of the electric motor, and the traction body 12 is also not shown, but is made of a chain instead of being made of a wire. In this case, the drive source 11 is set to a structure having a sprocket that meshes the chain.
[0027]
By the way, the traction body 12 is shown in the figure, and is divided into a first traction body 12a and a second traction body 12b, which are connected to the drive source 11, in two systems. The pulling body 12a moves the long opening / closing door 5, and the second pulling body 12b moves the short opening / closing door 6.
[0028]
FIG. 3 shows a hanging state of the first traction body 12a and the second traction body 12b which are the above-described two systems, and this will be described a little.
[0029]
That is, first, each of the tow bodies 12a and 12b is bent at a so-called intermediate portion, that is, is to be U-turned. At this time, the U-turn portion is connected to the fixed side B under the intervention of the spring 13. Then, the occurrence of mischievous slack in each of the pulling bodies 12a and 12b is prevented in advance.
[0030]
On the other hand, both ends of the first traction body 12a are connected to the long open / close door 5 with the bracket 14 interposed therebetween, that is, rooted, and both ends of the second traction body 12b are connected by turnbuckles 15. It is connected to the fixed side B while being so-called endless, that is, rooted.
[0031]
At this time, the intermediate portion of the second pulling body 12b is separately inserted and bent by two pulleys 16 held by the short door 6 and is bent more than in the first pulling body 12a. Have a lot.
[0032]
As a result, when the first puller 12a is driven by the drive source 11 and the movement amount per unit time at the drive source 11 is set to 1, the movement amount of the long opening / closing door 5 becomes 1: 1. On the other hand, in the second pulling body 12b, the movement amount of the short opening / closing door 6 is set to 1: 1/2. Therefore, the opening / closing door 5 which is long with respect to the moving speed of the short opening / closing door 6 is used. Is doubled, that is, double speed movement is realized.
[0033]
Incidentally, the drive mechanism 10 configured as described above operates as follows.
[0034]
That is, assuming that the opening 2a formed by the open / close doors 5 and 6 is opened 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 traction body 12a is The second traction body 12b moves in the direction indicated by the arrow b and in the direction indicated by the arrow c.
[0035]
As a result, the long opening / closing door 5 moves to the left in FIG. 3, and the short opening / closing door 6 moves to the right in FIG. 3. As a result, the opening / closing doors 5 and 6 are opened. 2a will be closed.
[0036]
Incidentally, if the drive source 11 is driven in the reverse direction from the above, the open / close doors 5 and 6 open the opening 2a.
[0037]
【The invention's effect】
As described above, according to the first aspect of the present invention, the two doors are linked to the pair of guide rails, so that the doors are so-called both sides as compared with the case where the doors are constructed in a cantilever structure. It becomes a support structure, and it can be expected to exert a great durability against the acting force from above.
[0038]
In addition, since the two doors move horizontally as they move along the guide rail, when the sheets are folded and stored, there is a risk that the sheets will not be stretched or folded smoothly. In comparison, smooth moving out and pull-in are facilitated.
[0039]
Further, according to the first aspect of the present invention, it is not possible to secure a storage space of the same length that is sufficient to store the two open / close doors on the lower side of the floor such as a stage floor and sandwiching the opening. Ideal for.
[0040]
As a result, according to the present invention, not only can a predetermined opening / closing function be exhibited, it can be easily installed with a simple configuration, and can be used without enormous maintenance costs. Ideal for expecting improvements.
[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 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 / close state of a conventional open / close door.
FIG. 5 is a view showing an open / close state of a conventional door in the same manner as FIG.
[Explanation of symbols]
2 Floor stage 2a Opening 3 Thrusting floor 5 as a lifting floor as a lifting device 5 Long opening / closing doors 5a, 6a Connecting wheel 6 Short opening / closing door 7 Guide rail 10 Driving mechanism 11 Driving source 12 Traction body 12a First pulling body 12b Second puller 13 Spring 14 Bracket 15 Turnbuckle 16 Pulley B Fixed side

Claims (1)

In an opening and closing device that opens and closes an opening formed in the floor from the lower side of the floor by an opening and closing door, a pair of guide rails disposed along the longitudinal direction on the lower side of the floor and on both sides of the opening, A short opening / closing door that includes two opening / closing doors that are movably linked to a guide rail via a connecting wheel, and a drive mechanism that opens / closes the two opening / closing doors, and that moves the two opening / closing doors in opposite directions. It is composed of a long open / close door that is twice as long as this short open / close door, and the drive mechanism is connected to a single drive source, and the long open door and the short open / close door are respectively connected to the drive source. The first traction body and the second traction body are moved in the direction, and the moving speed of the first traction body and the long opening / closing door is set to the second traction body and the short opening / closing door when the driving source is driven. Is set to twice the moving speed of The opening and closing device.

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