JPH0647094Y2 - Folding stage equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a folding system in which a horizontally-supported stage base plate is folded in two to stand up when not in use so that it can be stored close to a wall surface. It is related to Tamiya stage equipment.

[Prior Art and Problems] A foldable stage apparatus has been proposed for multipurpose use in auditoriums, gymnasiums, and the like.

The present invention is designed to enable a folding stage apparatus such as this to be stored horizontally along with a folding wall surface etc. when the stage base plate that is horizontally supported when in use is folded in two when not in use. It relates to the stage equipment.

Conventionally, as this type of device, for example, the invention of Japanese Utility Model Publication No. 57-48931 and the invention of Japanese Utility Model Publication No. 58-91962 have been proposed. In both of these inventions, two base plates (divided bases or bases) that compose the stage are connected by pivoting freely at the abutting edges, while the other edge of the fixed base is used as the base frame (machine frame) on the other side when used. While supporting the other edge of the movable base of the base of the base with wheels and supporting it horizontally, it can be used as a stage, while when not in use, the wire take-up device provided on the base frame side The other end side is pulled up, and while the shaft-coupling connecting portion is folded in two, both bases are brought into contact with each other so that they are upright. Then, in the folding, the former device is designed so that the middle of the wire to be passed between the outer edges of the two bases is bridged to the driving wheel provided below the tensioned position of the wire at the connecting leg provided at the shaft coupling part. When folding and folding, the tension of the wire by the winding device raises this moving wheel,
With this as a trigger, the shaft-attachment connecting part is pushed up to start bending, and then the folding method is adopted by pulling the wire and pulling the outer edge of the movable table.

However, since this method pushes up a heavy stage with the tension of the wire, an extremely high tension has to be applied here, and therefore, a strong wire and a withstand it for practical use. While a structure is required and manufacturing difficulty is involved, there is a problem that it is difficult to obtain a smooth folding start.

On the other hand, in the latter device, one end of the rotating arm pivotally attached to the intermediate leg is freely pulled by winding the wire instead of flipping it up due to the tension force of the wire and pulling this rotating arm in an inclined state. By raising it, the above-mentioned intermediate leg is pushed up, and the structure is such that the shaft-joint connecting part in the center of the stage is bent at the waist to fold it. However, also in this method, it is difficult to raise the tilted arm by pulling the wire due to the weight of the stage. Especially in the case of this type of stage apparatus where the height of the stage is generally low, it is extremely difficult to raise this by pulling the wire because the angle of inclination of the rotating arm that pushes up the shaft connection part is large It is inevitable that an excessive load acts on the shaft attachment part of the arm and it is easily damaged.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems in the conventional folding stage apparatus, and in particular, the difficulty in starting the bending of the shaft-attachment connecting portion at the time of starting the folding operation. The problem of the former device due to the tension of the wire alone, or the problem of the latter device with overload caused by raising the tilting rotating arm is solved, and a smooth folding is always maintained. The aim is to provide an improved folding stage set that can be expected.

[Means for Solving Problems] The present invention is based on the above-mentioned object, and pushes up a connecting portion for axially connecting a fixed base and a movable base by interlocking with winding of a wire, and a shaft attaching point of the connecting portion. It is intended to provide a stage device in which the trigger for the bending operation of both the bases is smoothly created with the base point as the starting point, and the wire can be quickly folded by the subsequent winding of the wire.

A feature of the present invention is that a pair of bending arm pieces, which are freely bent in a dogleg shape in the middle of the length, are placed face-to-face below a connecting portion where a fixed base and a movable base are flexibly connected. Assembled into a pantograph shape, the lower arm of the bending arm that composes the pantograph is equipped with wheels at the joints, and the lower pulley is provided, and each bending part of the bending arm is provided with a pair of upper pulleys facing each other. The wire drawn from the wire winding device provided on the base frame that supports one end of the fixed base is first hung on the lower pulley, and thereby, hung from one upper pulley to the other upper pulley to form a triangular loop on the lower pulley again. It is laid around, then hung on a folding pulley provided on the leg side that supports one end of the movable table, and the tip of the wire is passed again under the lower pulley to fix the end portion of the wire to the base frame, and the wire of the winding device. By pulling the upper pulleys together, the birefringent arm pieces are extended to push up the connecting portion between the fixed base and the movable base to make a waist break at the abutting portion of both bases, and then by winding the wire. Next, it is to provide a folding stage apparatus in which both folding pulleys are pulled to the base frame side and both bases are folded in half.

Next, the present invention will be described in detail with reference to the illustrated embodiments, and the features thereof will be clarified.

[Embodiment] FIG. 1 is a side view showing a stage according to the present invention which is horizontally unfolded and is ready for use, FIG. 2 is a side view showing a folding process, and FIG. 3 is a folded view. It is a side view of the state which stood up. The stage apparatus according to the present invention has a fixed base 1 rotatably and axially supported by a base frame 4 having one end fixed to a floor 3.
And a movable base 2 which is flexibly connected to a free end of the fixed base via a connecting member 5, and the other end of which is supported by a leg base 7 having wheels 6 as a main body.

The fixed base 1 and the movable base 2 are provided with metal frames 9 and 10 on their lower surfaces via crosspieces 8, respectively, and one end of the frame 9 on the fixed base 1 side is attached to the upper end of the base frame 4 via a shaft 11. The other end to shaft 12
It is pivotally attached to the connecting member 5 via. On the other hand, the movable base 2 has one end of the frame 10 pivotally mounted on the connecting member 5 via the shaft 13 and the other end pivotally mounted on the leg base 7 via the shaft 14.

Reference numeral 15 is a connecting portion of both bases 1 and 2 which are connected via the connecting member
In other words, with the intermediate leg that supports the lower surface of the abutting edge of both stands,
16 and 17 are auxiliary frames.

The intermediate leg 15 is fixed to one surface of the connecting member 5 and vertically supported, and one end of each of the auxiliary frames 16 and 17 is pivotally attached to the lower end portion thereof via shafts 18 and 19. The other ends of the auxiliary frames 16 and 17 are attached to the lower ends of the base frame 4 and the leg base 7 via shafts 20 and 21, respectively. It is attached so that it is parallel to 10 and 10.

Therefore, the fixed base 1 and the movable base 2 are supported horizontally by supporting the both ends by the base frame 4 and the leg base 7, and further supporting the abutting end portions of both, that is, the intermediate portion by the intermediate leg 15. , Both of these bases are pivoted around the shafts 12, 13, 18, 19 respectively provided on the connecting member 5 and the intermediate leg 15 as fulcrums to rotate the respective frames 9, 10, 16, 17 so that the intermediate parts are centered. It is designed to be folded in half. The upper and lower frames 9, 16, 10, 17 which are parallel to each other at the time of folding follow the folding while keeping the parallel state, and the intermediate leg 15 is based on the vertically standing base frame 4. In parallel with this, the pedestal 7 moves to the base frame side while maintaining the standing posture. At this time, the pedestal 7 rolls the wheels 6 on the floor 3 and moves horizontally linearly.

In the figure, 22 and 23 are refraction arm pieces that create a trigger for folding when the stage is folded in half, and 24 and 25 are provided in the refraction section provided in the middle of the length of both refraction arm pieces. The upper pulley and 26 are lower pulleys provided at the lower end connecting portions of the birefringent arm pieces.

The bending arm pieces 22 and 23 are respectively upper and lower arm portions 22a, 22b, 23a and 2
3b, the ends of the respective parts are pivotally attached by shafts 27 and 28 so as to be freely refracted. Then, each upper end of the intermediate leg 15 is rotatably attached to the upper end of the intermediate leg 15.
It was hung from this by 9,30, and the refraction part was faced so that it protruded toward the outside.Furthermore, the lower end comrades were pivoted by the shaft 31 so that both refraction arm pieces could be assembled in a pantograph shape. I am doing it. The lower pulley 26 is attached to the shaft 31, and the wheels 32 are coaxially supported so as to come into contact with the floor 3.

On the other hand, reference numeral 33 in the drawing denotes a wire stretched between the upper and lower pulleys 24, 25 and 26, and 34 denotes a folding pulley provided coaxially with the wheel 6 provided at the lower end of the leg stand 7.

The wire 33 is pulled out from a wire winding device (not shown) via an original pulley 35 that is laterally supported by the lower end of the base frame 4. The wire 33 pulled out from this extends horizontally from the original pulley 35 along the floor 3 to the leg end of the pedestal 7, and is first laid around the folding pulley 34 and folded back, and then laid on the lower pulley 26 from below. Then, one upper pulley 24 and the other pulley 25 are laid in this order, and laid again on the lower pulley 26 to make a loop so as to form a substantially triangular loop. After that, this end is hung and fixed to the locking portion 36 of the base frame 4. I am doing it.

This wire 33 is a pulling means for folding the stage device, and when it is pulled to the base frame side by the drive of the winding device, the two stands 1 and 2 are folded in two with the connecting part in the center as a fulcrum. Will be struck. To explain this relationship in detail, when the wire 33 is pulled to the base frame side by a winding device (not shown), the wire stretched between the pulleys is tensioned and pulls the pulleys together. At this time, the pulling acts on the pulley 34 which is the farthest away from the base frame 4 and serves as the turning point. This pulley receives the weight of the movable base and supports the frames 9, 10 and 16, 17 in a straight line. As a result, the pulling is prevented, and as a result, the tension of the wire acts on the upper pulleys 24 and 25, which are free to move, and pulls these pulleys together.

Since the upper pulleys 24 and 25 are supported by the bending portions of the bending arm pieces 22 and 23 as described above, the arms bent in a dogleg shape are extended along with the pulling, and the intermediate leg connected to the upper end through this extension. The connecting member 5 is pushed up via 15.

For this reason, the fixed base 1 and the movable base 2 which are in a horizontally extended state start to be bent with the connecting end as a bending point.

Incidentally, this bending progresses to the point where the two bending arm pieces 22 and 23, which are bent in a V shape as shown in FIG. 2, extend in a substantially straight line by the mutual pulling of the upper pulleys.

When the fixed base 1 and the movable base 2 bend due to the extension of the bending arm piece, and the upper pulleys 24, 25 become inaccessible next time, the winding tension is again accumulated on the wire 33. The pulling force acts on the pulley 34, pulling the leg base 7 closer. The attraction of this pedestal continues as long as possible,
The fixed base and the movable base are folded in two to stand up.

Fig. 3 shows the state in which the two stands are folded and erected by winding the wire. As is clear from the comparison between Fig. 1 and Fig. 3, the wire 33 is not folded in this fold. When the upper pulleys 24 and 25 come closer to each other and the return pulley 3
4 will be wound about the length which approached the base frame 4.

In this way, in order to unfold the folded stage for the next use, the wire 33 is fed out and the movable table 2 is pushed forward, and when pushed out to a certain degree, the movable table 2 is opened by its own weight. Will be self-propelled and flatten out. At this time, if the wire is gradually loosened, the shock at the time of deployment can be alleviated, but it is better to attach a cushioning material 37 to the lower end of the intermediate leg 15 in order to further absorb the shock of coming into contact with the floor.

[Advantages of the Invention] The folding stage apparatus of the present invention has been described above in detail with reference to the embodiments. However, as is clear from the above description, according to the apparatus of the present invention, it is installed oppositely by the wire winding operation. The upper pulleys provided in the bending part of the bending arm piece are pulled together, and along with this, the bending arm piece is extended to create a trigger for bending at the connection part between the fixed base and the movable base. It can be easily started, and smooth operation can be expected. In particular, in the folding stage apparatus of this kind, starting in the folding is the most important, but in the present invention, the bending portion of a pair of bending arm pieces assembled in a pantograph shape is extended by pulling the pulleys together. Since it is configured so that it can be reasonably made to fold, it causes an excessive burden on the pulling wire and the pivotal joint of the rotating arm in the above-mentioned conventional device. It has excellent effects in terms of operability and durability.

[Brief description of drawings]

The drawings show one embodiment of the folding stage apparatus according to the present invention. Fig. 1 is a side view showing a horizontally deployed state of use, and Fig. 2 is a wire winding for folding. The side view of the bending arm is stretched to push up the connecting portion between the fixed base and the movable base to make a bent state, and FIG. 3 is a side view in a state of being folded up in two and standing upright. The figure is an enlarged view for explaining the working relationship of the bending arm piece. Fig. 4 shows the state of use, Fig. 5 shows the state of extension due to folding, and Fig. 6 is the left side view of the above figure. is there. FIG. 7 is an enlarged side view of a portion showing the connection between the fixed base and the movable base. 1 ... Fixed stand, 2 ... Movable stand 4 ... Base frame, 5 ... Connecting member 6 ... Wheels, 7 ... Leg stand 9,10 ... Frame, 11, 12, 13, 14 ... Shaft 15 ... Intermediate leg, 16, 17 ... Auxiliary frame 18,19,20,21 ... Shaft, 22,23 ... Bending arm pieces 24, 25 ... Upper pulley, 26 ... Lower pulley 32 ... Wheels, 33 ... Wire 34 ... Folding pulley, 35 ... Original pulley

Claims (1)

[Scope of utility model registration request] 1. A leg provided with a fixed base and one side edge of a movable base which are freely bent at the center, the other edge of the fixed base being a base frame fixed to the floor, and the other edge of the movable base having wheels. In a folding stage apparatus in which each of the shafts is attached to each stage and both of the stands are folded upright with the central connecting portion as a base point, an upper end portion is rotated below the connecting portion. A pair of bending arm pieces, which are freely pivoted so that they can bend in the shape of a dogleg in the middle of their length, and whose lower end portions are pivotally connected to each other and are assembled in a pantograph shape, are suspended, and wheels are attached to the lower end connection portions. And equipped with a lower pulley,
Further, a pair of upper pulleys are provided so as to face the bending portions of the both bending arm pieces, and a wire fed from a wire winding device provided in the base frame is hung on the lower pulley, and then one upper pulley to the other upper pulley. The wire is wound around the pulley, and again around the lower pulley to make a loop, and then around the return pulley provided on the footrest side, and again passed through under the lower pulley to fix its end portion to the base frame, and the wire of the winding device. A stage in which both upper pulleys are brought together by a winding operation to extend both birefringent arm pieces to push up the fixed base and the movable base connecting portion, and then the folding pulley is pulled toward the base frame side and folded in half. apparatus.