JPH0414607Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] In gymnasiums, theaters, etc., multiple movable tiered floors can be arranged in a stair-like manner as necessary so that even the audience at the rear can clearly see the performance in front. A telescoping type that unfolds and stores multiple steps in front of the highest step in a shelf-like manner below the highest step at the rear end, making use of the wide floor formed in front of it. Terraced viewing seats may be installed.

The present invention relates to a control device that, when extending such bleachers, always moves them forward smoothly in sequence starting from the lower tiered floor.

[Conventional technology]

The above-mentioned bleachers are usually horizontally long, with both ends of the floor plate supported on a trolley via pillars so that they can be moved back and forth.When in use, the minimum It is designed to unfold in a step-like manner with the step floor at the forefront, and when not in use, the multiple steps in front of it are stored like a shelf inside and below the highest step bed at the rear end. .

However, it is not possible to lay rails on the floor to guide the forward and backward movement of each tier, and each tier is large and horizontally long, so it tends to meander when moving, and the tiers are not parallel to each other. When the tiered floors are moved forward and backward at the same time, the tiered floors interfere with each other, making it impossible to extend the seating area smoothly.

For example, a means to solve this problem is
It is described in Publication No. 181759 and Japanese Unexamined Patent Publication No. 82176/1982.

[Problem that the invention attempts to solve]

In the former publication mentioned above, it is necessary to securely install a fixing member on the floor behind the spectator seats, which reduces the usable floor space.
Moreover, in the latter case, the number of parts is large.

[Means for solving problems]

In this invention, at the front end of the carts other than the innermost cart,
The free end protruding inward fixes a stopper located directly above the adjacent cart, and the rear end is pivoted to the cart immediately after the base end of the stopper of the carts other than the innermost and outermost carts, and the rear end is supported by a spring. , the upper end is inclined forward and upward, and the center part of the upper edge is at the same height as the free end of the stopper of the cart adjacent to the outside, and is provided with a rocking plate, and is installed at the rear of the cart other than the outermost side. A free end protruding outward at the lower front of the support column is located directly above the adjacent cart, and when the cart moves and reaches above the swing plate of the stopped outer cart, The above-mentioned problem is solved by providing a pressing plate that presses down the stopper below the free end of the stopper.

[Effect]

In the bleachers to which the present invention is applied, even if the innermost and lowest tier begins to move forward, all other tiers have the stopper at the front end of the outer tier adjacent to the front end of the rocking plate. It doesn't move forward because it's touching.

When the innermost step moves to the front limit, its support comes into contact with the stopper of the outermost step, and the pressure plate at the rear of the innermost step touches the swing plate of the outermost step. is pushed down from the free end of the stopper of the outermost step, so that the innermost step and the adjacent step on the outside move forward until their support abuts against the stopper.

Similarly, the plurality of tiers stored in the outermost tier are sequentially pulled out from the inside.

When the frontmost tier begins to retreat, its pressing plate retreats from the rocking plate at the front end of the adjacent tier on the outside. When the frontmost step moves back to its rear limit, its press plate comes into contact with the front surface of the pillar of the outermost step, and the front step and the outermost step move backward. do.

In the same way, each tier that had been unfolded retreated,
It is stored in the last step bed.

〔Example〕

The drawing shows the left side of a retractable stair-shaped bleachers consisting of four tiered seats 1A, 1B, 1C, and 1D of different heights to which the present invention is applied, and the right side is symmetrical with the left side. Since the structure is configured as follows, illustration thereof is omitted.

Figures 1 to 3 are the innermost (lower end of Figure 2, third
This shows the lower part of the bleachers when the tiered floor 1A (right end of the figure) is pulled out, and each tiered floor 1A, 1B, 1C, 1D
are four pairs of parallel left and right carts 2 of the same shape and different size.
At the rear of the building, a pillar 3 is erected which is higher as it goes outward.
A floor plate 4 is installed on the front surface of these with support arms 5 interposed therebetween.

6 is a wheel for running the steps 1A, 1B, 1C back and forth, and the outermost step 1D is fixed to the floor surface 7,
Reference numeral 8 denotes a guide roller that is pivotally installed on the side surface of each truck 2 and comes into contact with the side surface of the adjacent truck 2.

At the front ends of the upper surfaces of the intermediate tiers 1B and 1C and the outermost tier 1D, there are
The base end 9a of the stopper 9 facing toward the bottom is fixed, and each free end 9b projects almost to the center directly above the step floors 1A, 1B, and 1C.

Immediately after the base end 9a of the stopper 9 on the upper surface of the steps 1B, 1C, a swinging plate 10 bent in a downward U-shaped groove is outwardly disposed, as shown in FIGS. 3, 5, and 6. The rear ends are pivotally connected to the upper portions of the step floors 1B and 1C, respectively.

Each swing plate 10 is biased upwardly by a spring 11 provided between it and the guide roller 2, so that when the audience seats are shortened,
The top surface slopes forward and upward, and a stopper 9 is provided on the front edge.
An upright piece 10a, which faces the front-rear direction and has an upper edge inclined forward and upward, is provided at a portion of the upper surface which is in contact with the free end 9a and which is located inward from the center of the upper surface.

As shown in FIGS. 3 and 4, the step bed 1A,
A pressing plate 12 bent in a downward U-shaped groove and facing forward is fixed to the front lower part of each of the pillars 3 of 1B and 1C, and a pressing plate 12 is fixed to the lower end of the outer side of the plate 12, which is horizontal and facing outward. Pressing pieces 12a are provided close to the upper surfaces of the stepped beds 1B, 1C, and 1D, respectively.

In the above-mentioned bleachers, even if the innermost step 1A is pulled out by input or power from the shortened state in which the steps 1A, 1B, and 1C are stored inside and below the step 1D, the steps 1B and 1C will not swing. At the front end of the plate 10,
Since the free ends 9a of the stoppers 9 of the tiered floors 1C and 1D are in contact with each other, and the tiered floor 1D is fixed, the tiered floors 1B, 1C, and 1D do not move forward.

When the tier 1A moves further forward, its support 3 comes into contact with the free end 9a of the stopper 9 of the tier 1B, and the press plate 12 pushes the swing plate 10 of the tier 1B against the free end of the stopper 9 of the tier 1C. 9b via the upright piece 10a, the step bed 1A and the step bed 1B move forward until their supports 3 come into contact with the free end 9b of the stopper 9 of the step bed 1C.

Similarly, the tiered floor 1C is pulled out, and each of the tiered floors 1A, 1B, and 1C developed in a step-like manner is opened by lowering the fixing fitting 13 provided at the front end of the tiered floor 1A, and then opening the locking hole drilled in the floor surface 7. (not shown), it is fixed so that it cannot move forward or backward.

Each tiered floor 1A, 1B, 1C expanded and fixed
By pulling out the fixing fitting 13 from the floor surface 7, it can be moved backward and stored in the lower part of the stepped floor 1D.

When the tiered floor is automatically unfolded by the drive means, the fixing fittings 13 are not needed because the tiered floor does not move back due to the braking force of the driving means.

In addition, the pressing piece 1 on the pressing plate 12 of the step bed 1C
2a may be omitted.

[Effect of idea]

In the bleachers to which the present invention is applied, after the front tier is completely pulled out, the next tier, which had been restrained until then and was guiding the advancement of the front tier, is moved forward. The tiers are pulled out following the first tier, and the tiers unfold regularly, starting from the innermost tier, so even if each tier is large and horizontally long, it will not meander or overlap each other. They can be developed smoothly without becoming non-parallel and interfering with each other.

Furthermore, the large seats can be expanded halfway and used as medium- or small-sized seats.

Since there are no protruding objects, such as fixing members, on the sides or rear of the audience seats, the floor surface can be utilized without waste.

The number of members constituting the device of the present invention is small;
In addition, since the shape is relatively simple, it can be manufactured easily and at low cost.

[Brief explanation of the drawing]

Fig. 1 is a central longitudinal inner side view of the bleachers to which the present invention is applied, Fig. 2 is a sectional view taken along line X-X in Fig. 1,
Figure 3 is a Y-Y line arrow view in Figure 1, Figure 4 is a
FIG. 5 is an enlarged front view of the pressing plate, FIG. 6 is an enlarged side view of the rocking plate, and FIG.
FIG. 3 is an enlarged side view showing the swing plate pressed down by the pressing plate. 1A, 1B, 1C, 1D... tier floor, 2... trolley, 3... pillar, 4... floor plate, 5... support arm, 6...
...wheels, 7...floor, 8...guide rollers, 9...
First stopper, 9a... Base end, 9b... Free end, 1
0... Rocking plate, 10a... Standing piece, 11... Spring, 12... Pressing plate, 12a... Pressing piece, 13...
…securing bracket.

Claims (1)

[Scope of utility model registration request] Both ends of a horizontally long floor plate are supported via pillars on a trolley so that they can be moved back and forth. When in use, multiple tiers of different heights are deployed in a step-like manner with the lowest tier at the forefront, and when not in use. Sometimes, in retractable staircase-like bleachers where the tiers in front of the rear tiers are stored in a shelf-like manner inside and below the tiers at the rear end, there is a free end that projects inwardly at the front end of the carriages other than the innermost carriage. The stopper located directly above the adjacent cart is fixed, and the rear end is pivoted to the cart immediately after the base end of the stopper of the carts other than the innermost and outermost carts, and the upper end is tilted forward and upward by a spring. A rocking plate is provided, the center of the upper edge of which is at the same height as the free end of the stopper of the truck adjacent to the outside, and at the lower front of the pillar other than the outermost support installed at the rear of the truck. The free end protruding outward is located directly above the adjacent cart, and when the cart moves and reaches above the rocking plate of the stationary outer cart, the free end protrudes outward from the free end of the stopper. An extension control device for an extendable staircase-like bleacher seat, which is provided with a pressing plate that pushes downward.