JPH09268788A - Safety cover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of a device and enhance stage performance effect and improve safety as well by providing a safety cover on a slide base provided below the opening of a rotary floor and lifting with a screwed jack. SOLUTION: An opening 3 is provided on a part of a revolving floor 1 on a stage of a theater or the like. Then, movable sliding bases 10 are provided along the bottom of the revolving floor 1 from the development position under the opening 3 to the lateral housing position. Then, a safety cover 11 is provided on the sliding base. The safety cover 11 is lifted up to the same level to the revolving floor 1 with screwed jacks 30. This construction makes it possible to finish one plane of the revolving floor 1 swiftly and easily and provide a high stage performance effect and high safety as well and house the safety cover 11 swiftly and easily when the opening 2 is opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a safety lid device for a movable floor formed on a part of a rotatable floor surface of a theater or the like.

[0002]

2. Description of the Related Art In a theater or the like, a part of the floor of the stage is cut into a circle, and this is used as a rotating floor (turning tray) that can rotate about the center, so that the stage scene can be changed quickly. It is designed to be able to enhance the effect of production.

Further, a part of such a rotating floor is formed as a movable floor (aeri) which can move in the vertical direction, and an actor riding on the aris You can also push up big tools. In addition, in such a basement, it is formed integrally with the rotating floor,
There are two types: a type in which the basement itself turns as the turning floor turns, and a type in which the turning floor is separated from the turning floor and turns independently.

Now, in such a stage apparatus, when the auction is descending into the abyss, an opening leading to the abyss is generated at the location of the abyss, which is dangerous. Therefore, a safety lid device is installed to close the opening. .

This is as shown in FIG. 9, for example.

Explaining this, as shown in the figure, the rotating floor 1 is provided with an opening 3 for allowing the abutment 2 to come up. Here, the rotating floor 1 is driven by a motor 4 and is formed so as to be rotatable around a rotation center 1a.

Now, the opening 3 is closed by a safety lid 41 when it is not closed by the abutment 2. The safety lid 41 is pivotally supported in contact with the opening 3 via a connecting pin 42, and between a closed position shown by a solid line in the figure and an open position shown by an imaginary line in the figure, It can be opened and closed like a door.

The opening and closing of the safety lid 41 is driven by an actuator 44 rotatably connected to the lower part of the rotary floor 1 via a connecting pin 43. That is, the tip of the piston rod 46 of the actuator 44 is attached to the safety lid 4.
When the hydraulic cylinder 44 is extended, the safety lid 41 is pushed out to take the closed position by being pivotally supported by the connecting pin 45 at 1, while the hydraulic cylinder 44 is retracted, the safety lid 41 is retracted to take the open position. It is like this.

Further, as a safety lid device used for the rotating floor 1 similar to that shown in FIG. 9, there is also one shown in FIG.

According to this, the safety lid 51 is provided below the opening 3 and is driven in the horizontal direction by the drive chains 52 arranged on both sides, so that the solid line is drawn from the storage position shown by the imaginary line in the drawing. Is pulled out to the deployed position shown in
The lower part of the opening 3 is closed.

[0011]

By the way, such a conventional safety lid device has the following inconveniences.

That is, the one shown in FIG. 9 has a safety lid 41.
Has a structure that opens downward, there is a risk that people or objects may suddenly slide down diagonally if the cover is opened without noticing that people or objects are on the safety lid 41.

Further, since the safety lid 41 is opened and closed in a circular arc, it takes a long time to open and close. Especially, in the above-mentioned type in which the rotating floor rotates independently,
Although it is required to reduce the size and weight of the safety lid device, a large actuator 44 may be required for such a swing operation of the safety lid 41, so that the safety lid device becomes large.

On the other hand, according to the structure shown in FIG. 10, the device can be downsized, the opening / closing time can be shortened, and the cost can be reduced, but even if the opening 3 is closed, the safety lid 5 is closed.
1 causes a step difference between the floor surface 1 and the floor surface 1. Therefore, in order to eliminate this step difference, it is necessary to carry a portable safety lid on the safety lid 51 and place it on the safety lid 51. It is troublesome, and it limits the production.

The present invention focuses on such problems,
An object of the present invention is to provide a safety lid device which is used in a sill provided on a rotating floor and can be downsized, and which has improved stage effect and safety.

[0016]

SUMMARY OF THE INVENTION According to the present invention, an opening is provided in a part of a swingable turntable, and a sliding position is provided directly below the opening to a storage position lateral to the expansion position. The slide base is movable, the safety lid is provided on the slide base, and the elevating means for raising the safety lid to the same level as the rotating floor.

[0017]

According to the present invention, when the safety lid closes the opening, the safety lid is moved up and down by the elevating means to ascend to the same level as the rotating floor. It can be easily performed, and the rotating floor finished in such a plane provides a high stage effect and safety.

Further, when the opening is opened, the safety lid can be pulled down by the elevating means and the safety lid can be stowed easily by sliding the slide base. At this time, the safety lid can be lowered once before stowed. Therefore, the person riding on the safety lid can detect the danger and can prevent the fall from the opening.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the rotating floor 1 is formed with an opening 3 through which the abutment 2 comes up. Further, the rotating floor 1 is independent of the lower basement (Naraku), and only the rotating floor 1 has a motor 4 around the rotation center 1a.
It is configured so that it can be swung by.

Since the opening 3 is closed when the abutment 2 is lowered, the safety lid 11 moves along the lower surface of the rotating floor 1 and rises to the same plane as the rotating floor 1 at the opening 3.
Is provided.

The safety lid 11 is mounted on a slide base 10 that moves in parallel with the lower surface of the rotating floor 1, and is lifted up by a screw jack 30. That is, after being moved to the deployed position shown by the solid line, it is jacked up by the jack 30 to the closed position shown by the imaginary line above the deployed position.

2 to 5 show this safety lid device in detail.

FIG. 2 is a plan view of the slide base 10 when it is in the retracted position, viewed from above. As shown in this figure, the slide base 10 formed of a rectangular frame in the center of the figure is stored at this storage position and the expanded position shown in FIG.
Is arranged inside the rectangular frame of the fixed frame 20 that is fixed so as to surround (and on the right side of).

On the other hand, FIG. 3 shows the vicinity of the lower side of the opening 3 (the deployed position of the slide base 10). The slide base 10 (not shown in the figure) has moved to the deployed position, and the safety lid 11 supported on the slide base 10 is disposed inside the fixed frame 20 in the deployed position. The safety lid 11 is formed into a shape (in this case, a rectangle) that just closes the opening 3 according to the shape of the opening 3.

As shown in these figures, a pair of rails 24 are provided on the fixed frame 20 near both sides of the slide base 10 in the horizontal movement direction. Shoes 25 attached to both sides of the slide base 10 are engaged with the rail 24 so as to be sandwiched (see FIGS. 4 and 5), and the slide base 10 extends along the rail 24 via the shoes 25. Fixed frame 20
The inside of the is stably guided horizontally.

On the other hand, the slide base 10 is driven by a pair of chains 21 which are arranged in parallel with the rails 24 on both sides of the slide base 10, and a part of which is connected to the tension bracket 23 on the slide base 10 side.
Made by the circulation of. This pair of chains 21
Respectively, from the drive side sprocket 22a on the storage position side of the fixed frame 20 to the driven side sprocket 2 on the deployment position side.
2b, and the pair of drive side sprockets 22a are circulated synchronously by the synchronized rotation of the pair of drive side sprockets 22a. Chain 2 on both sides of this slide base 10
Due to the synchronous circulation of 1, the slide base 10 moves horizontally without tilting.

The drive side sprocket 22a is driven by a pair of universal joints 27 extending from the motor 26 to the drive side sprockets 22a on both sides by a motor 26 with a brake fixed to the end of the fixed frame 20 on the storage position side. The drive side sprocket 22 connected to the tip of this universal joint 27 is driven to rotate synchronously.
This is done by rotating a.

Above the slide base 10, a safety lid 11 not shown in FIG.
It is supported parallel to the slide base 10. The screw jack 30 is driven by a motor 32 via a universal joint 31 to lift the safety lid 11 upward, as described later.

It should be noted that the limit switch 2 is provided on each end of the fixed frame 20 on the storage position side and the expansion position side.
8 and a plurality of dampers 29 are provided. As a result, when the slide base 10 reaches the retracted position or the deployed position, the limit switch 28 senses this to prevent the slide base 10 from overshooting, and the damper 29 reduces the impact due to the movement of the slide base 10. It is like this.

The jack-up mechanism of the safety lid 11 is shown in detail in FIGS.

As shown in these drawings, the screw jacks 30 are provided on the left section side of FIG. 4 and the right section side of FIG. 5, respectively, and the safety lid 11 is attached to the tip of a rod 30a which can be vertically moved up and down. I support you.

The rotation of the motor 32 is transmitted to the pair of screw jacks 30 via the universal joint 31, and this rotation is transmitted to the screw jacks 3.
It is converted into an axial up-and-down movement of the rod 30a through a gear (not shown) in 0. At this time, the transmission of the rotation of the motor 32 by the universal joint 31 is performed in synchronism with the left and right screw jacks 30, so that the pair of rods 30a ascends and descends in a synchronous manner to support the safety lids on the rods 30a. 11 moves up and down while keeping horizontal with respect to the slide base 10 and the rotating floor 1.

Although the safety lid 11 moves up and down from the position shown by the solid line in the figure to the position shown by the imaginary line, the slide base 1
A tubular bush 35 for guiding the ascending / descending is provided on the side of the 0 screw jack 30. The bush 35 has its shaft fixed in the vertical direction and is provided so as to penetrate the slide base 10.

A guide bar 33 fixed to the safety lid 11 via a guide plate 34 is slidably inserted into the bush 35. The guide bar 33 has a diameter slightly smaller than the inner diameter of the bush 35. When the safety lid 11 moves up and down, the guide bar 33 slides coaxially with the bush 35 while contacting the inner diameter of the bush 35. Stabilize 11 orbits.

Further, a stopper plate 36 to which a stopper bolt 37 is attached is provided at the lower end of the guide bar 33. As a result, when the safety lid 11 is jacked up to the same level as the rotating floor 1, the stopper bolt 37 comes into contact with the lower surface of the slide base 10 as shown by an imaginary line in the figure, so that the safety lid 11 is The above rise is restricted so that no step is formed between the floor surface 1 and the safety lid 11.

Next, the operation will be described.

FIG. 6 to FIG. 8 show the respective operating states of the rotating floor (turning tray) 1, the safety lid 11, and the abutment (small pressure) 2.

As shown in FIG. 6, when the rotating floor 1 turns, the slide base 10 is in the deployed position, and the safety lid 11 is jacked up to the same level as the rotating floor 1. Therefore, the rotating floor 1 is on a flat surface including the place of the safety lid 11, so that the production is not hindered and the safety of the stage is improved. The swing floor 1 can be swung by removing the tray positioning pin 5 for fixing the position, and at this time, the abutment 2 is stored below the swing floor 1.

Next, as shown in FIG. 7, when the abutment 2 rises, the rotating floor 1 is fixed at a predetermined position,
After the safety lid 11 is pulled down to the deployed position of the slide base 10, it is stored together with the slide base 10 in the storage position on the lower surface of the rotating floor 1. The abutment 2 moves up with respect to the opening 3 thus opened. The abutment 2 is fixed by the bar 6 at the opening 3.

Before the safety lid 11 is stowed, it is lowered to the deployed position of the slide base 10 and then retracted to the stowed position. Therefore, even if a person or an object is placed on the safety lid 11 at the time of storage, the safety lid 11 remains as it is. The person on the safety lid 11 is prevented from sliding down into the abyss, and when the person notices the lowering of the safety lid 11, the person can be prevented from falling.

Further, as shown in FIG. 8, after the slide 2 is lowered, the slide base 10 is again pulled out to the deployed position, the safety lid 11 is jacked up from this deployed position, and the rotating floor 1 is flush with the same plane. It is formed.

As described above, when the safety lid 11 is unfolded and stored, the slide base 10 slides laterally, and the safety lid 11 can be immediately moved up and down between the rotating floor 1 and the slide base 10 by the jack 30. Compared with the conventional swing type safety lid or the addition of a portable type safety lid, it is quick and easy to finish the entire surface of the rotating floor 1 and push out the abutment 2 by these series of operations. This eliminates the need to carry a portable safety lid.

[0044]

According to the present invention, when the safety lid closes the opening, the safety lid is raised to the same level as the rotating floor through the elevating means, and the finishing of the rotating floor on one plane can be performed quickly and quickly. It can be easily performed, and the rotating floor finished in this way provides a high stage effect and safety, and when the opening is opened, the safety lid is lowered by the elevating means and the slide base is opened. The safety lid can be stowed quickly and easily, and
At this time, the safety lid descends before storing, so the person riding on the safety lid can detect the danger,
It is possible to prevent falling from the opening.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a partial plan view of the same.

FIG. 3 is a partial plan view of the same.

FIG. 4 is a partial front view of the same.

FIG. 5 is a partial front view of the same.

FIG. 6 is an explanatory diagram showing a state of the same operation.

FIG. 7 is an explanatory diagram showing a state of operation in the same manner.

FIG. 8 is an explanatory diagram showing a state of the same operation.

FIG. 9 is a side view showing a conventional example.

FIG. 10 is a side view showing another conventional example.

[Explanation of symbols]

 1 Rotating floor 2 Seri 3 Opening 10 Slide base 11 Safety lid 30 Screw jack

Claims (1)

[Claims] 1. An opening provided in a part of a swivel rotatable floor, and slidably movable along an underside of the swivel floor from a deployed position directly under the opening to a side storage position. A safety lid device comprising: a slide base; a safety lid provided on the slide base; and an elevating means for raising the safety lid to the same level as the rotating floor.