JPS6323350B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to telescoping and movable stair-shaped bleachers, called rollback stands, which are installed mainly in gymnasiums, etc., and which are equipped with handrails to ensure the safety of spectators. Relating to telescoping and movable stepped bleachers.

In recent years, in order to enable multi-purpose use in gymnasiums, etc., movable, extendable, stepped bleachers, called rollback stands, have been increasingly installed. These retractable and movable staircase-like bleachers have a structure in which multiple stages of movable platforms, each of which has a different height, are connected to each other in order so that they can be moved forward and backward. By moving it forward as if pulling it out one by one from the platform, the entire platform will extend into a step-like shape, allowing spectators to ride on each platform, and when not in use, each platform will be moved one after the other, starting with the first platform. By moving backwards to enter the lower side of the rear movable platform, the entire structure is shortened into a vertical shelf with a small front and rear width, and can be stored on the wall of a building.

Recently, as buildings have grown larger, the telescopic and movable staircase-like bleachers have also become larger, and what used to be 5 or 6 tiers is now made with 10, 20 or more tiers. Because the movable platform in the rear row is quite tall, it is extremely dangerous for spectators to fall off the left and right sides when moving, causing serious injury. For this reason, it was necessary to provide handrails such as safety shelves on the left and right outer edges of the upper surface of the movable platform of each stage.

However, since the handrails are attached to pillars erected at about the height of a person's waist above the movable platform of each tier, the movable platform of each tier can be moved from the stair-like extension of the abovementioned seats. When the movable platforms are sequentially moved backward and shortened, the handrails and columns may hit the movable platform at the rear of each stage, or the handrails and columns at the front and rear stages may interfere with the backward movement of each movable platform. For this reason, conventionally, when each movable platform is moved backward, the handrails are removed from each movable platform along with the support. Therefore, the work is very troublesome, and since the handrail support must be removably attached to the movable bed, there is a risk that it may come off by mistake, resulting in a lack of safety.

This invention was made in view of the above circumstances, and even if handrails are completely fixed together with the supports for each stage of the movable bed, there will be no hindrance to the movement of each stage of the movable bed. To provide a retractable and movable stair-shaped spectator seat that can be moved backwards, eliminates the need for attaching and detaching work of handrails as in the past, and is extremely simple and highly safe without the risk of coming off by mistake. With the goal.

In other words, in the telescopic and movable stepped bleachers of the present invention, each lower end is attached and supported by the front portion of the side end of a plurality of movable platforms, so that the front struts are connected to the side ends of the movable platform. The movable bed is erected in a forward-leaning state at a position where the movable bed does not come into contact with the rear movable bed when the movable bed moves backward, and the lower end portions of the movable bed are provided at the rear portions of the side ends of the movable bed. By attaching and supporting the respective rear columns, the respective rear columns are tilted forward to a position further outside the front column on the outside of the side end of the movable platform and does not come into contact with the front column of the rear stage when the movable platform moves backward. It is constructed by installing a handrail that straddles the upper ends of both the front and rear columns of each stage and does not come into contact with the front pillar of the rear stage when the movable platform moves backward. When the platform moves backward, the handrail and its front and rear supports also move backward together with the movable platform, and at that time, the handrail and the front and rear supports not only hit the rear movable platform, but also the handrails of each stage. The seats are also characterized by telescopic, movable, step-like spectator seats that can be shortened by retracting to the bottom of each rear stage together with the movable platform, without the pillars colliding with each other.

An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1A, 1B, 1C, 1D, and 1E are horizontally elongated flat movable platforms arranged in order in the front-back direction, and these have the same length in the left-right direction and width in the front-back direction. Underframe 2A,
2B, 2C, 2D, and 2E (only the right side is shown and the left side is not shown), the structure extends stepwise as shown in Figures 1 and 2, or vertically as shown in Figure 3. It can be shortened into a shelf shape. In other words, the above-mentioned truck underframes 2A to 2E are made up of a leg base 4 having a longitudinally elongated cross-sectional shape and having a plurality of small wheels 3, and a support leg 5 that stands upward from approximately the middle part of the leg base 4 in the front and rear direction. It has an inverted T-shape, and the movable platform is attached via a support beam 6 that protrudes forward from the upper end of the support leg 5. In the figure, reference numeral 7 designates a horizontally elongated member having a lip groove shape in cross section and is fixed to the front surface of the upper end of the support leg 5 in order to connect the left and right truck frames of each movable platform. Here, each of the above-mentioned truck underframes 2A to 2E has supporting legs 5 of different heights, and the movable platform frames 1A to 1E have different heights.
is supported in a stepwise manner from the front stage to the rear stage, and the bogie frame 2A of each stage is supported.
The frontage l ₁ , l ₂ , l ₃ , l ₄ , l ₅ (see FIG. 1) on the left and right sides of 2E to 2E are sequentially increased from the front to the rear. In this way, the movable platforms 1A to 1E of each stage are integrated with the respective trolley frames 2A to 2E, and move forward in order from the lowest one at the front stage, or retreat to the bottom of the one at the rear stage. I'm starting to be able to do it. In addition, the movable platform frames 2A to 1E of each stage are attached to the platform frames 2A to 2 of each stage to prevent them from completely slipping out and detaching from the lower side of each subsequent stage to the front during forward movement.
E are sequentially connected to each other by means such as locking fittings (not shown), and the movable platform 1A at the forefront is moved forward manually or electrically as if pulled out from the state shown in FIG. The second and subsequent stages can be pulled out and moved forward one after another to follow suit, and can be extended until the entire structure becomes the staircase state shown in Figures 1 and 2, and from that extended state it can be reversed. When the foremost movable platform 1A is moved backward, it retreats to the bottom of the second movable platform 1B, and the penetrating members 7 move to the left and right carts of the second movable platform 1B. It hits the front side of the support leg 5 of the underframe 2B, and this causes the second
The movable platform 1B of the tier is pushed and moves backward together with the one in the front row, and when it retreats to the movable platform 1C of the third tier, it moves backwards in the same way as before, and the whole In general, it can be shortened into a vertical shelf shape as shown in FIG. Up to this point, it is substantially the same as a conventionally known rollback stand. Reference numeral 8 in FIGS. 2 and 3 denotes a chair that is attached to the upper surface of the movable floor tables 1A to 1E of each stage by pivotally supporting the legs via the mounting bases 9, respectively. When 1E is extended, it is held upright by appropriate means so that spectators can sit on it, and when each movable platform 1A to 1E moves backward, its legs fall forward with their legs and become flat, so that the audience can sit on the platform together with the movable platform. It is designed so that it can enter the underside of the mobile floor platform.

In such telescoping and movable stair-shaped spectator seats, front and rear supports 10 are provided at the side ends (not shown on the left side) in the left and right direction of each of the movable platforms 1A to 1E.
A, 11A, 10B, 11B, 10C, 11C,
Handrail 1 via 10D, 11D, 10E, 11E
2A, 12B, 12C, 12D, and 12E are attached. Since each stage is the same, the front and rear supports 10A, 11A and handrail 12A provided at the side ends of the movable platform 1A in the first stage will be described in detail. 10
A has its lower end slightly bent inward in an L-shape, and by fixing and supporting the side end of the movable platform 1A near the front end, it stands tilted forward at an angle of about 15 degrees. The rear support 11A is equipped with a movable platform 1A.
By fixing and supporting the lower end to the tip of the armrest 13 that protrudes outward from the back surface of the through member 7 on the rear end side of the side end, it is erected in a state tilted forward at the same angle as the front strut 10A. has been done. Also, the above front strut 10A
The rear support 11A has a short L-shaped bent portion at the lower end, so it is erected at a position slightly deviated outward from the side end of the movable platform 1A, whereas the rear support 11A has a relatively long cross arm 13. It is erected at a position offset outward from the side end of the movable platform 1 by more distance than the front support 10A. That is, the front support 10A is erected outside the side edge of the movable floor 1A at a position where it will not come into contact with the rear movable floors 1B to 1E when the movable floor 1A moves backward, and is also provided with a rear support post 10A. The column 11A is located further outside the front column 10A on the outside of the side end of the movable platform 1A, and is connected to the front column 10 of the rear movable platforms 1B to 1E when the movable platform 1A moves backward.
It is erected at a position where it does not come into contact with B to 10E. A handrail 12A is provided so as to straddle the upper ends of both the front and rear columns 10A, 11A and not to come into contact with the front columns 10B to 10E of the rear stages 1B to 1E when the movable platform 1A moves backward.
This handrail 12A has a bent part 12 bent inward at a right angle at the front end so as to form an L shape when viewed from above.
It is attached by fixing the tip of the front bent portion 12 to the upper end of the front strut 10A, and fixing the rear end to the upper end of the rear strut 11A. Note that the rear column 11A is appropriately taller than the front column 10A, and the handrail 12A is bent in a substantially slanted shape when viewed from the side, and approximately one-third of the rear end of the handrail 12A is bent. It is provided so that it is horizontal, and the part on the front end side is slanted downward toward the front. The forward downward inclination angle of the handrail 12A is set to be equal to the upward slope in the stairway state when the movable platforms 1A to 1E of each step are extended. In this way, the front and rear supports 10A, 11A to 10 are attached to the side ends of the movable floor tables 1A to 1E of each stage.
E, 11E are erected, and handrails 12A to 12E are provided with the front and rear ends fixed to the upper ends of both the front and rear columns of each stage. Of the handrails at each stage, the last handrail 12E is longer than the others for the sake of the audience coming from behind, and the rear support 11E of the last handrail 12E does not tilt forward. It is installed vertically.

Therefore, the handrails 12A to 12E of each stage are arranged at the outside positions of the side ends of the movable floor platforms 1A to 1E of each stage, respectively, at a height of about the waist of a human being, and as shown in FIGS. As shown in the figure, when each movable floor platform 1A to 1E is extended into a staircase shape, the tip L-shaped bent portion 12 of each handrail 12A to 12E protrudes inward, and the front and rear end portions of each stage are vertically stepped. Although they overlap in shape, the handrails 12A to 12E are arranged in a substantially straight line to guide spectators moving on the movable platforms 1A to 1E, and also to guide the spectators moving on the movable platforms 1A to 1E, and This will surely prevent spectators from falling. In addition, approximately two-thirds of the front side of the handrails 12A to 12E of each step is held in a downwardly inclined state, so that when each movable platform 1A to 1E is extended, it follows the upward slope of the stairs. They are arranged almost in a straight line, and there is little difference in level between the handrails, making it convenient for spectators to move with their hands together.

In addition, when each of the movable platforms 1A to 1E is moved backward and shortened in order to clear the bleachers from the stair-like extended state, the handrails 12A to 12E and their respective front and rear supports 10A, 11A to 10
E and 11E are attached and fixed to the side ends of each movable platform 1A to 1E and move backward together to move the third
As shown in the figure, each of the movable platforms 1A to 1E retracts to the bottom of each subsequent stage and is shortened into a vertical shelf shape as a whole, and at the same time each handrail 12A to 12E fits under each subsequent stage. It becomes like this. At this time, the front and rear columns 10A, 11A to 10E, 11E that support the handrails 12A to 12E are tilted forward at the side ends of the movable platform 1A to 1E, respectively, and the front columns are attached to the rear movable platform. The rear struts are erected at positions further deviated outward from the side ends of the front struts supported by the side ends of the rear movable platform, and handrails 12A to 12E are provided for each stage. The tip of each front end bent part 12 is fixed to the upper end of the front column, and the rear end is fixed to the upper end of the rear column, and each of them is supported in a manner that becomes lower in stages as it goes to the front stage. Step movable floor stand 1A
Handrails 12A to 1 of each stage during backward movement of 1E to 1E
2E and front and rear struts 10A, 11A to 10E, 1
Of course, 1E does not hit the movable platform in the next stage, and the handrails and columns of each tier do not collide with each other, and each of them retracts with the movable platform under the one in each subsequent stage and is shortened. become able to do so.

As described above, the handrails 12A to 12E of each tier can be moved back and forth together with the movable platforms 1A to 1E without any interference while being attached and fixed to the side ends of the movable platforms 1A to 1E with their respective front and rear supports. Therefore, it is very simple and does not require the operation of removing the handrail, and is advantageous in ensuring safety.

In the above embodiment, the lower ends of the rear columns 11A to 11E of the handrail are attached and supported via separate armrests 13 to the side ends of the movable floor platforms 1A to 1E, respectively. The lower end portions of 11E to 11E may be bent and integrated.

In addition, in the above embodiment, the rear columns 11A to 11E are taller and longer than the front columns 10A to 10E of each stage, and each handrail 12A to 12E is provided in a downwardly inclined state. When the floor platforms 1A to 1E are extended into a staircase shape, the handrails 12A to 12 of each step are extended approximately parallel to the upward slope of the staircase state.
This is to ensure that E is aligned, and even if this is not done, the handrails and the front and rear supports can be moved backwards along with the movable platform of each stage without any problem.

In addition, as shown in FIGS. 1 to 4 above, the front and rear supports 10A, 11 of the handrails 12A to 12E of each stage are
One parapet panel 14A, 14B, 14C, 14 is installed between each of A to 10E, 11E.
D and 14E are installed in such a way that they do not impede the above-mentioned back and forth movement, thereby providing even greater safety. In other words, the parapet panel 14 of each tier
As shown in Figures 2 and 3, A to 14E should be placed so that the lower edge of each panel is at a higher position than the upper edge of the balustrade panel two stages before. The parapet panel 14 is provided with the upper and lower width dimensions and installation height set so as to be located at a lower position than the lower edge of the panel.
A to 14E are fixed to the front struts 10A to 10E by front upper brackets 15A to 15E, and are fixed to the rear struts 11A to 11E by rear lower brackets 16A to 16E. Moreover, as shown in FIGS. 1 and 4, 15A, 15C, 15E and 1 of the above brackets
6B and 16D are narrow, while 15B, 15D and 16A, 16C, and 16E are wide,
Railing panels 14 for the first row, third row, and fifth row
A, 14C, and 14E are shifted inward, and the second stage
The balustrade panels 14B and 14D in the fourth stage are provided so as to be deviated outward, so that they are staggered inward and outward alternately when viewed from the front. They are designed so that they do not hit each other when moving back and forth from 1E to 1E.

Next, the main body of the telescoping and movable staircase-like bleachers in the above-mentioned embodiment, that is, the movable platforms 1A to 1 of each stage.
The side panel 17A, 17
B, 17C, 17D, and 17E are provided.
If these side panels 17A to 17E were simply attached to the lower side ends of the movable platforms 1A to 1E in each stage, they would obstruct the back and forth movement of the movable platforms 1A to 1E, so they are not included here. Figure 1/2
As shown in FIG. 4, the frontage widths of the movable platforms 1A to 1E of each stage are l ₁ , l ₂ , l ₃ . It is attached to the outside of the rear half of the In other words, the frames 18 each formed in an inverted L shape according to the height of the bogie underframes 2A to 2E are fixed at the front end of the upper horizontal part to the back surface of the upper end of the support leg 5 of the bogie underframe, and the rear It is attached by fixing the lower end of the hanging part to the rear end of the leg base 4 of the bogie underframe, and the rear half of the leg base 4 is attached to the position behind the through member 7 of each of the bogie underframes 2A to 2E. Support leg 5 and inverted L-shaped frame 1
8, and side panels 17A to 17E are attached to the outer surfaces of the rear half of the quadrilateral frame-shaped leg base 4, the supporting legs 5, and the inverted L-shaped frame 18, respectively. .

The side panels 17A to 17E move forward and backward together with the truck frames 2A to 2E of the movable platforms 1A to 1E at each stage. During this movement, the widths of the left and right frontage of the cart frame become l ₁ , l ₂ , l ₃ , etc.
As shown in the figure, the width gradually increases from the front to the rear, and each side panel is located behind the long pier 7 extending from the left and right of each stage.
The side panels 17A to 17E of each stage do not come into contact with each other, nor do they come into contact with other movable floor stands or truck underframes. Therefore, each side panel 17A to 17
E is the movable floor platform 1A to 1 of each stage as shown in Fig. 2.
When E moves forward and extends stepwise, it closes the lower side of the end of each of the rear movable platforms 1B, 1C, 1D, and 1E, and each movable platform 1A to 1E
When the movable platform 1E moves backward and shortens into a vertical shelf shape as shown in FIG. 3, the movable platform 1E at the last stage is accommodated at the rear of the truck frame 2E, overlapping both inside and outside.
Note that the cart frame 2A of the first movable platform 1A has a side panel 17 on the outside of the front half of the foot platform 4.
A' is installed. With this, each mobile platform 1
When extending into a step-like shape from A to 1E, the lower sides of each left and right end are all closed by side panels, completely preventing danger such as children from entering, and improving the appearance.

As described above, the present invention has a plurality of stages of movable floor bases, each of which has its lower end attached to and supported by the front portion of the side end thereof, so that the front struts are connected to the movable floor base outside the side end portions of the movable floor base. By tilting forward and standing in a position where it will not come into contact with the rear movable platform when moving backward, and by attaching and supporting the lower end of each to the rear part of the side end of the movable platform, each A rear column is erected in a forward-leaning state at a position further outside the front column on the outside of the side end of the movable platform and does not come into contact with the rear front column when the movable platform moves backward; The handrails are provided so that they straddle the upper ends of both the front and rear columns of each tier and do not come into contact with the front columns of the rear tier when the movable platform moves backwards, so that when the movable platform moves backwards, it moves backwards together with the movable platform. The handrails and their front and rear supports do not touch the movable platform of each rear stage, and the handrails and supports of each stage do not touch each other, and each handrail along with the movable base does not touch the lower side of the rear stage. It is now possible to enter and exit without interfering with the movable platform of each stage, and the handrails can be fixed to each stage of the movable platform without interfering with the pillars. To provide an extremely simple and highly safe telescopic movable stair-shaped spectator seat with a handrail, which eliminates the need for any attachment/detachment work and eliminates the danger of the handrail coming off unnecessarily.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is a plan view in the extended state with the left side and chair omitted, and Figure 2 is a partially cutaway side view in the extended state.
FIG. 3 is a side view in the shortened state, FIG. 4 is a front view with the left side and chair omitted, and FIG. 5 is a perspective view showing the attachment structure of the handrail and front and rear supports to the movable bed. 1A to 1E...Moveable floor platform, 2A to 2E...Bolly frame, 3...Wheels, 4...Legs, 5...Support legs, 6...Support beams, 7...Through members, 10A to 10E...Front support, 11
A to 11E...rear support post, 12A to 12E...handrail, 13...branch.

Claims (1)

[Claims] 1.Multiple stages of movable platform, each with different heights,
When in use, the trays are moved forward in sequence from the lowest one to form a stair-like shape, and when not in use, they are moved backwards in order from the one at the forefront to the bottom of each rear platform. In the telescopic and movable staircase-like bleachers that can be shortened into a vertical shelf, the lower ends of each stage are attached and supported by the front portions of the side ends of the plurality of stages of movable bases, so that the front pillars of each of the movable bases are supported. They are erected in a forward-inclined state at a position outside the side edge of the movable platform so that it does not come into contact with the subsequent movable platform when the movable platform moves backward, and each of By attaching and supporting the lower ends of the respective rear columns, the respective rear columns are moved forward to a position further outside the front columns on the outside of the side ends of the movable platform so that it will not come into contact with the rear front column when the movable platform moves backward. It is characterized in that it is erected in an inclined state, and a handrail is provided so as to straddle the upper ends of both the front and rear columns of each stage and not to come into contact with the front column of the rear stage when the movable platform moves backward. Telescoping and movable tiered bleachers.