JP2996352B2 - Mobile stage - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mobile stage that is optimal for use as a temporary stage in a multipurpose hall, a gymnasium, or the like.

[Prior art] In a multipurpose hall or a gymnasium in recent years, it is assumed that a temporary stage is provided each time in place of the installation stage of origin,
It is stated that a movable stage that facilitates the transfer is frequently used as the temporary stage.

By the way, these types of movable stages are nowadays not only movable but also foldable so as to save space without occupying a large storage area when not in use. Suppose you have been.

That is, the movable stage proposed so far is
In general, an upper floor is formed so as to be foldable so as not to occupy a large area when not in use, and a caster is provided on a lower leg for supporting the floor, and the floor of the movable stage is provided. It is formed so as to be able to move along the surface.

Therefore, in the conventional movable stage, a desired stage can be formed by moving the stage to a predetermined position and flattening the floor by a so-called opening operation.

[Problems to be solved by the invention]

However, in the above-mentioned conventional mobile stage, there is a disadvantage that the height of the floor portion with respect to the floor surface is fixed in advance and cannot be freely changed.

Therefore, when it is intended to provide stages having different floor portions, it is necessary to prepare another stage formed to have floor portions having different heights.

As a result, even if the movable stage can be folded to save space, the number of movable stages becomes large and occupies a large storage area when not in use.
There is concern that the purpose of using the mobile stage will be lost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the provision of a temporary stage in a multipurpose hall, a gymnasium, or the like, in which the height of the floor relative to the floor can be arbitrarily changed. The purpose is to provide a new mobile stage that is optimized for use in a vehicle.

[Means for solving the problem]

In order to achieve the above object, the configuration of the present invention is
A floor portion having two floor plates and formed so as to be able to be folded in two, and a caster arranged to support the floor portion from below and disposed on the lower end side so as to be able to move on the floor surface. Legs and
In the movable stage having, while the floor portion has a plurality of X-links to support each floor plate from below and to vary the height of the floor portion with respect to the floor surface when the floor is raised and lowered, The leg portion has a drive mechanism that operates to raise and lower the X-link and to fold the floor into a mountain shape.

The driving mechanism includes a screw rod that stands upright below the portion where the floor is folded into two in a mountain shape, a driving device that rotates the screw rod, and a screw mechanism that is screwed to the screw rod to move up and down. Bracket, a drive link having one end pivotally connected to the bracket and the other end pivotally connected to the X-link, one end pivotally connected to the lower end of the screw rod, and the other end pivotally connected to the leg member. And a connecting rod.

Further, it is assumed that the driving device is operated by a separately prepared prime mover, and in particular, a portable electric motor is selected as the prime mover.

Further, it is assumed that a tuning mechanism is provided on the floor so that the two floor plates are raised and lowered in synchronization with the operation of each X link, so that they are raised and lowered synchronously.

Further, it is assumed that the caster in the leg portion is held by a bracket pivotally attached to the lower end of the leg member and a free lock stay damper is provided between the leg member and the bracket.

(Operation)

Therefore, when the floor is flattened and can be used by using the casters provided at the lower end side of the legs, the floor is folded into a mountain shape and is not in use. At times, the movable stage can be moved along the floor such as a hall.

Then, the movable stage in the folded state is flattened by the so-called opening operation of the floor by the operation of the drive mechanism,
It can be used as a so-called stage.

That is, the movable stage in the folded state is enabled by the operation of the drive mechanism, and the X-link is driven by the further operation of the drive mechanism, whereby the floor plate constituting the floor can be raised. .

In addition, the movable stage in the usable state prevents the caster from rotating in the legs and stabilizes the legs by locking the free lock stay damper, thereby stabilizing the movable stage. Can be used.

In addition, by performing various operations reverse to the above, the floor plate of the movable stage is lowered to change the height of the floor with respect to the floor surface, and the floor is folded into a mountain shape by further operating the drive mechanism. Will be.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

As shown in FIG. 1, a movable stage according to the present invention basically includes a floor 1 and a leg 2,
Further, it has a plurality of X-links 3 and a drive mechanism 4.

In FIG. 1, some components of the movable stage are shown without using a diagram.

The floor portion 1 is formed by connecting two floor plates 10 via a hinge 11 and, as shown in FIG. 2, is formed so as to be folded in a mountain shape at the connection portion.

In the present invention, the reason that the floor 1 is folded in a mountain shape is that the upper surface of the floor plate 10 is exposed to the outside when the floor 1 is folded, and the floor 1 is This is because the appearance is improved as compared with the case where the so-called back side is exposed by being folded in a shape.

Each floor plate 10 forming the floor portion 1 is arranged so that its inner end portions 10a abut against each other, and an upper beam member 12 is continuously provided on the lower surface thereof to reinforce the floor member. ing.

In the floor 1, a lower beam 13 is arranged below the upper beam 12 so as to face the upper beam 12.

Further, a tip 11a serving as an upper end of the hinge 11 is pivotally attached to an inner end 13a of the lower beam member 13 which faces each other.

A base end 11b serving as a lower end of the hinge 11 is connected to a frame (not shown) as a base together with a drive mechanism 4 described later.

By the way, an X link 3 is provided on the floor 1, and the X link 3 is formed so that the height of the floor 1 with respect to the floor surface F such as a hole can be changed during the undulating operation. Become.

To explain a little, the X link 3 is composed of two link members 30 and 31 formed to have a length slightly shorter than the length of the upper beam member 12 (or the lower beam member 13).
To form an X-cross shape by pivotal attachment.

1, the upper end 30a of one link member 30 is pivotally attached to the outer end 12a of the upper beam member 12, and the lower end 31a of the other link member 31 is connected. The lower beam 13 is pivotally attached to the outer end 13b.

The X link 3 is provided at the lower end 30b of one link member 30.
Is present in a free state at the inner end 13a of the lower beam 13 and the upper end 31b of the other link member 31 is
At the inner end 12b in a free state.

Therefore, when a force for lifting the lower end 30b of the one link member 30 acts on the lower end 30b of the one link member 30, the lower end 30b of the one link member 30 horizontally moves outward along with the beam 13 and the other link 30 The upper end 31b of the member 31 also moves horizontally along with the beam 12, and at this time, the X link 3
Gradually rises, and the floor panel 10 is raised in a horizontal state.

That is, the floor plate 10 rises when a force for lifting it is applied to the lower end 30b of the one link member 30, and when the floor plate 10 is in the rising state, the floor plate 10 is released when the force is released. Will fall.

Therefore, in the present invention, by controlling the undulating operation of the X link 3, the floor plate 10 can be moved up and down while maintaining a horizontal state with respect to the floor surface F.
10 also can be positioned at any height relative to the floor F.

Note that a tuning mechanism 14 is provided between the two floor plates 10 so that when the floor plate 10 moves up or down, no displacement occurs between them, and the tuning mechanism 14 is not provided in this embodiment. , A ball 14a disposed on the end face of one upper beam 12
And a ball receiver 14b disposed so as to face the end face of the other upper beam member 12.

On the other hand, the leg 2 is formed so as to support the floor 1 from below and move on the floor F with casters 20 disposed at the lower end side thereof.

That is, in this embodiment, the leg 2 is pivotally attached to the outer end 13b of the lower beam 13 and is vertically suspended to support the lower beam 13 from below. Lower end 21 of leg member 21
a bracket 22 pivotally attached to a, a caster 20 held by the bracket 22, and a free lock stay damper 23 installed between the leg member 21 and the bracket 22.
And

The caster 20 has a so-called brake mechanism,
With the selected operation, it is possible to select whether or not the caster 20 can be turned.

When the free lock stay damper 23 is in a free state, the free lock stay damper 23 is in an extendable state, that is, a state in which the movable stage floats, and the caster 20 is used to move the movable stage. Enable movement.

The free lock stay damper 23 is placed in a state where its contraction is prevented when it is in the locked state.

Accordingly, at this time, the movement of the movable stage is prevented in conjunction with the rotation of the caster 20 being prevented, and the fixing at the predetermined position becomes possible.

Note that the bracket 22 may be connected to the leg member 21 so as to freely rotate horizontally.

By the way, in the present invention, the leg 2 is provided with a drive mechanism 4 for operating the X link 3 up and down and operating the floor 1 so as to fold the floor 1 into two.

That is, as described above, the drive mechanism 4 is supported by a frame (not shown) that continuously connects the base end 11b of the hinge 11, and the drive mechanism 4 is provided below the portion where the floor 1 is folded in a mountain shape. A screw rod 40 standing upright, a driving device 41 connected to the upper end of the screw rod 40 and rotating the screw rod 40, and a screw 41 that is screwed to the screw rod 40 and rotates with the screw rod 40 during rotation. Screw rod
And a bracket 42 that moves up and down along with the bracket 40.

A driving link 43 is provided between the bracket 42 and the lower end of one of the link members 30 of the X link 3, and a drive link 43 is provided between the lower end of the screw rod 40 and the leg member 20. Is provided with a connecting rod 44.

The drive unit 41 is operated by a prime mover prepared separately. In particular, it is assumed that a portable electric motor is selected as the prime mover.

By the way, when a portable electric motor is selected as the prime mover, the weight of the movable stage itself can be reduced,
This is because the moving work becomes easy.

Therefore, in place of selecting the portable electric motor, a motor may be incorporated in the movable stage in advance.

In addition, a seat portion 40a is continuously provided at the lower end of the screw rod 40, and the connecting portion 44 does not contact the floor surface F when the seat portion 40a is in contact with the floor surface F. Is taken into account.

Therefore, in the drive mechanism 4 configured as described above, the bracket 42 is moved in the normal direction from the state shown in FIG. When the drive link 43 is lowered as shown in the figure, the drive link 43 causes the X link 3 to fall down. At this time, the floor plate 10 is lowered to change the height with respect to the floor surface F.

On the other hand, when the screw rod 40 is further rotated by the further operation of the driver 41 from the above-mentioned lowered state of the X-link 3, the bracket 42 is lowered to the lowest as shown by the imaginary line in FIG. , The drive link 43 is via the X link 3, but as shown in FIG.
Will be folded in a mountain shape at the upper end 11a.

That is, when the driving link 43 is forcibly lowered from the above state, the center of the floor 1 is pulled down. At this time, the lower end of the screw rod 40 is disposed there. Is locked to the floor F, and further lowering is prevented.

Therefore, the floor 1 is in a state where the outside is forcibly lowered around the hinge 11 as the center of rotation. However, the outer end of the floor 1 is in a so-called fixed state with the legs 2, The outside of the floor 1 is prevented from descending.

Therefore, when the driving link 43 is forcibly lowered from the above state, the driving mechanism 4 is lifted by its own operation, and at this time, the leg 43 is operated by the action of the connecting rod 44 connected to the bracket 42. The member 20 is pulled toward the center, so that the floor 1 is folded around the hinge 11 in a mountain shape at the center.

At this time, in the leg portion 2, the casters 20 roll on the floor surface F, so that the folding operation of the floor portion 1 is performed smoothly.

According to the movable stage according to this embodiment formed as described above, not only is the floor 1 flat and usable, but also the floor 1 is not By using the casters 20 provided at the lower end side of the leg portion 2 in the use state, the movable stage can be moved along with the floor surface F.

The movable stage in the folded state can be used as a stage by flattening the floor 1 by a so-called opening operation.

That is, in order to make the movable stage in the folded state usable, the drive unit 41 of the drive mechanism 4 is driven by appropriate means, and in the present invention, the drive unit 41 is driven by a separately prepared portable motor, which is a motor. So-called opening operation.

In the movable stage in a usable state, the rotation of the caster 20 in the leg 2 is prevented, and the free lock stay damper 23 is locked to stabilize the leg 2. Thus, the movable stage can be stably used.

Further, by performing the reverse operation, the movable stage is folded in a mountain shape, and can be stored when not in use.

In the embodiment described above, the seat 40a is provided at the lower end of the screw rod 40.
Are provided so that the connecting rod 44 does not come into contact with the floor surface F when the seat portion 40a comes into contact with the floor surface F. 40a is drive mechanism 4
May be used as the lower end of a jack type stand mechanism connected to a frame (not shown) that supports the frame.

〔The invention's effect〕

As described above, according to the present invention, a floor portion having two floor plates and formed so as to be able to be folded in two, and a caster provided at the lower end side to support the floor portion from below. And a leg formed so as to be able to move on the floor surface, wherein the floor portion supports each floor plate from below and raises and lowers the height of the floor portion with respect to the floor surface when the floor is raised and lowered. While having a plurality of X-links to make it variable,
It has a drive mechanism that operates to raise and lower the link and to fold the floor into two ridges, so that the caster can be moved freely regardless of whether it is used or not. Needless to say, the height of the floor with respect to the floor can be freely changed, and the height of the floor with respect to the floor by extending the operation of flattening the floor folded in a mountain shape. Can be changed, and when the thing whose height with respect to the floor is adjusted is cleared for non-use, as an extension of the operation of lowering the height of the floor, the floor is piled up. This makes it possible to fold it in a shape like a circle, simplifying operations during use and non-use, and has the advantage of being optimally used for a temporary stage in a multipurpose hall, a gymnasium, or the like.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a movable stage according to the present invention partially cut away and omitted, and FIG. 2 is a front sectional view showing a folded state thereof. [Description of Signs] 1... Floor 2... Leg 3... X-link 4... Drive mechanism 10... Floor plate 11. Hinge 12. … Tuning mechanism, 20… Caster 21… Leg member, 22, 42… Bracket 23… Free lock stay damper 30, 31 Link member, 32… Pin 40… Screw rod, 41… Driver 42 Bracket 43 Drive link 44 Connecting rod F Floor

Claims (1)

(57) [Claims] 1. A floor portion having two floor plates and formed so as to be capable of being folded in two, and a caster disposed at a lower end side of the floor portion for supporting the floor portion from below and moving the floor surface. And a plurality of Xs, each of which has a floor supporting each floor plate from below, and varying the height of the floor with respect to the floor surface when the floor is raised and lowered. A movable stage having a link, and a driving mechanism for operating the legs to raise and lower the X-link and to fold the floor into two folds.