JPH0432446Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] In gymnasiums, theaters, etc., multiple movable tiers are provided in the form of steps that descend in the front, and the front tiers are placed below the inside of the higher tiers at the rear. BACKGROUND ART A movable spectator seat is known in which the floor is sequentially retracted to utilize the floor surface in front of it.

The present invention relates to a control device that, when moving such spectator seats, always moves them forward and backward smoothly in sequence starting from the lower tiered floor.

[Conventional technology]

The above-mentioned movable seats usually have multiple horizontally long base plates that are lower toward the front, supported at both ends on a trolley via pillars so as to be movable back and forth. When in use, the lowest step floor is placed at the front and is expanded in a step-like manner by hand or power.When not in use, multiple steps on the front side are expanded inside and below the highest step bed at the rear end. The floors are polymerized and stored one after another.

However, it is not possible to lay rails on the floor surface to guide the forward and backward movement of each tiered floor, and each tiered floor is quite large and horizontally long, so it tends to meander when moving. It is difficult to maintain parallelism between the floors.

Furthermore, when the tiers are moved forward and backward at the same time, the tiers interfere with each other, making it difficult to move them smoothly.

Means for solving such problems are described in, for example, Japanese Utility Model Application Publication No. 58-181759 and Japanese Patent Application Publication No. 62-82176.

[Problem that the invention attempts to solve]

In the case described in the former publication, it is necessary to provide a fixing member on the floor behind the audience seats, which reduces the usable floor space accordingly.

In addition, the latter has a large number of parts, and there is a risk that each tier may wobble slightly back and forth when the drawer is pulled out.

[Means for solving problems]

In this invention, both ends of a horizontally long bed plate are supported on a cart via pillars so as to be movable back and forth, and a plurality of tiers of different heights are stacked so that the shorter ones are located on the inside. When in use, it unfolds in a step-like manner with the lowest step at the forefront, and when not in use, the front step is sequentially accommodated within and below the rear step. In the bleachers, the inner end protruding inwardly fixes to the front end of the bogies other than the innermost bogie a stopper piece located directly above the adjacent bogie, and the stopper piece of the bogies other than the innermost and outermost bogies is fixed. Immediately after the outer end of the piece, the rear end is pivoted on the cart, and rotates forward and upward under the bias of a spring, so that the center part of the upper edge touches the inner end of the stopper piece of the cart adjacent to the outside. A swinging rod is installed at the same height as the rear of the truck, and the free end protruding outward is located at the lower front of the column other than the outermost column, and is placed directly above the adjacent truck. When the carriage moves and reaches above the swinging rod of the stopped outer carriage, it is pressed down by the pressing rod which is designed to push down from the inner end of the stopper piece, and the pressing rod. The above-mentioned problem is solved by providing a locking piece whose front end is pivotally supported at the base of the stopper piece, and which rotates downward under its own weight and engages with the front edge of the stopper piece when the stopper piece is climbed over from behind. It is something to be solved.

[Effect]

In the bleachers to which the present invention is applied, even if the innermost and lowest tier begins to move forward, the stopper piece at the front end of the adjacent tier on the outside comes into contact with the front end of the swinging rod of the other tiers. Because of this, the other tiers will not move forward.

When the innermost step moves to the front limit, its support comes into contact with the stopper piece of the outermost step, and the pressing rod at the rear of the innermost step prevents the swinging of the outermost step. Push the rod further down from the inner end of the stopper piece on the step bed outside of it. Therefore, along with the innermost berm, the adjoining berm on the outside moves forward until its support comes into contact with the stopper piece, and at the same time, when the locking piece rides over the stopper piece, it descends due to its own weight, and its trailing edge , engages the front edge of the stopper piece.

At the same time, the plurality of tiers housed in the outermost tier are sequentially pulled out from the inside, and each tier that has been developed in a stepped manner has a support and a locking piece adjacent to each other. It is fixed by coming into contact with the rear and front edges of the stopper pieces of the step floor.

When each of the tiers that have been expanded and joined together releases the locking piece of the frontmost tier using an appropriate means and starts to move backward, the pressing rods will move against the adjacent tier on the outside. As the swinging rod moves back from the swinging rod at the front end, the swinging rod rotates upward due to the bias of the spring, and when the frontmost step bed retreats to its rear limit, its pressing rod moves against the adjacent step bed on the outside. The support column also comes into contact with the front surface, pushes up the locking piece of this step bed, and releases the engagement with the stopper piece of the step bed outside it. Thus, along with the front end tier, the tiers adjacent to the outside thereof are also retracted.

Similarly, each of the expanded tiers is sequentially retreated from the front tier to the rearmost tier.

〔Example〕

The drawing shows the right side of a stepped movable seating area to which the present invention is applied, which is made up of four stepped floors 1A to 1D that increase in size toward the rear, and the left side is configured symmetrically with the right side. Therefore, illustration is omitted.

1 to 3 show the lower part of the bleachers when the frontmost, ie, innermost (bottom end in FIG. 2, right end in FIG. 3) step floor 1A is pulled out.

Each of the tiered floors 1A to 1D is attached to the rear of the underframe 2, which is of the same shape and size and is parallel to each other.
A horizontal support rod 5 that is erected and protrudes from the front thereof.
A base plate 4 is installed on top.

Reference numeral 6 denotes wheels for driving the three front steps 1A, 1B, and 1C, which are pivotally connected to the underframe 2.

The highest and outermost step bed 1D is fixed to the floor surface 7.

Adjacent underframes 2 are placed at appropriate locations on the outer surface of each underframe 2.
A guide roller 8 that comes into contact with the inner surface of the shaft is pivotally mounted.

At the front ends of the upper surfaces of the intermediate tiers 1B and 1C and the last tier 1D, there are
The outer end 9a of the stopper piece 9 protruding to is fixed,
Each inner end 9b is connected to the adjacent step bed 1A,
It protrudes directly above 1B and 1C.

On the upper surface of the middle two tiered floors 1B and 1C,
Immediately after the inner end 9b of the stopper piece 9 protruding inward from the outer adjacent step beds 1C, 1D, there are shown in FIG.
As shown in FIGS. 5 and 6, the swinging rod 1 has a downward U-shaped cross section when viewed from the front and is elongated from front to back.
0 is covered, and the rear ends are pivotally connected to the step floors 1B and 1C with left and right axes, respectively.

Each swinging rod 10 is provided with two parts provided between it and the underframe 2 (in the embodiment, the bearing fitting of the guide roller 8).
Further, the spring 11 applies upward rotational force.

A rising piece 10a that faces the front-rear direction and whose upper edge slopes forward and upward is provided at the middle part of the upper surface of the swinging rod 10 in the left-right direction. Passing the lower surface of the inner end 9b of the stopper piece 9 on the step floor, the swinging rod 10 rotates upward, and its front edge touches the inner end 9b of the stopper piece 9.
It is designed to come to the rear of the

As shown in FIGS. 3 and 4, the front lower part of each support column 3 of the three front steps 1A, 1B, and 1C has a downward U-shape and faces forward. The rear end of the pressing rod 12 is fixed.

At the lower end of the outer piece of the press rod 12, there is a press piece 12a that is horizontal and faces outward, and that is close to the upper surface of the step beds 1B, 1C, and 1D adjacent to the outside.
is installed protrudingly.

As shown in Figures 1 and 4, each pressure rod 1
A front end of a locking piece 13 facing rearward is pivotally supported at the lower front end of the locking piece 2 . The rear edge 13a of the locking piece 13 is inclined in an arc shape directed downward and forward.

When the audience seat is shortened, the locking piece 13 rotates downward due to its own weight, and the lower end of the rear edge 13a comes into contact with the upper surface of the step floor 1A, 1B, 1C to which it is attached. There is.

In the above-mentioned bleachers, when the innermost tier 1A is pulled out by human power or power from the shortened state in which the tiers 1A, 1B, and 1C are stored inside and below the outermost tier 1D at the rearmost position, the innermost tier 1A is pulled out adjacent to it. Step bed 1
Since the inner ends 9a of the stopper pieces 9 in the outer adjacent tiers 1C and 1D are in contact with the front ends of the swinging rods 10 in the tiers B and 1C, and the tiers 1D are fixed, each tier 1B , 1C, 1D do not move forward.

When the step bed 1A moves further forward, its support 3 moves forward.
The pressing rod 12 contacts the inner end 9a of the stopper piece 9 of the outer step bed 1B, and the pressing rod 12 moves the swinging rod 10 of the outer step bed 1B to the inner end 9a of the stopper piece 9 of the step bed 1C.
Push it up to below b via the rising piece 10a. Therefore, along with the tiered floor 1A, the tiered floor 1B also
The support 3 is the inner end 9b of the stopper piece 9 of the step bed 1C.
Move forward until it touches the.

At the same time, the locking piece 13 on the step bed 1A rides over the inner end 9b of the stopper piece 9 on the step bed 1B, and the rear edge 13b is caused by its own weight to move over the inner end 9b of the stopper piece 9.
b, and both tiers 1A and 1B are joined together.

Similarly, each of the tiered floors 1A, 1B, and 1C, which are pulled out to the tiered floor 1C and developed in a step-like manner, is
When the locking piece 13 comes into contact with the stopper piece 9, it is fixed so that it cannot move forward or backward.

Each step bed 1A, 1B, 1 expanded and joined together
In C, 1D, the locking piece 1 of the foremost step bed 1A
3 is rotated upward by an appropriate operation to release the engagement with the stopper piece 9, so that the step bed 1A can be moved backward.

As a result, the pressing rod 12 of the step bed 1A is moved back from the swinging rod 10 of the next step bed 1B, so that the swinging rod 10 is rotated upward by the bias of the spring 11.

When the step bed 1A retreats further, its pressing rod 12
The pressing piece 12a pushes up the locking piece 13 of the next step bed 1B, releases the engagement with the stopper piece 9 of the next step bed 1C, and then comes into contact with the support 3 of the step bed 1B. The tiered floor 1B also retreats together with the tiered floor 1A.

Similarly, the tiered floor 1C is also moved back and stored below the tiered floor 1D.

Note that the locking piece 13 of the tiered floor 1A may be omitted, and the cart 2 of the tiered floor 1A may be appropriately fixed to the floor surface 7 after the bleachers are fully expanded.

[Effect of idea]

(a) After the previous rung has been completely pulled out, the next rung, which was previously restrained and was guiding the advance of the previous rung, continues following the previous rung. When pulled out, multiple tiers unfold regularly starting from the innermost one, so even if each tier is large and horizontally long, it may meander or the tiers may become non-parallel to each other. They can be deployed smoothly without interfering with each other.

(b) Large bleachers may be extended halfway and used as medium or small bleachers.

(c) Since the supports and locking pieces of each unfolded tier are in contact with both the front and rear ends of the stopper pieces of the adjacent tier, each tier does not move back and forth unnecessarily.

(d) If there is some wobbling back and forth, the rear edge of the locking piece that slopes forward and downward will move further down due to the weight of the locking piece, and the wobbling will be eliminated.

(e) Even when storing each unfolded tier into the rearmost tier, the tiers are automatically retracted sequentially starting from the frontmost tier, allowing for smooth storage without confusion. can.

(f) Since there are no protruding objects, such as fixed members, on the sides or rear of the bleachers, valuable floor space can be used without waste.

(g) Since the number of constituent members is small and the shape is relatively simple, it can be manufactured easily and at low cost.

[Brief explanation of drawings]

Fig. 1 is a central vertical side view of the bleachers to which the present invention is applied, Fig. 2 is a sectional view taken along the line X-X in Fig. 1, and Fig. 3 is a view taken along the line Y-Y in Fig. 1. , FIG. 4 is an enlarged front view of the pressing plate, FIG. 5 is an enlarged front view of the rocking plate, FIG. 6 is an enlarged side view, and FIG. 7 is the rocking plate pressed down by the pressing plate. FIG. 1A, 1B, 1C, 1D... Step floor, 2... Underframe, 3... Support column, 4... Base plate, 5... Horizontal support rod,
6... Wheels, 7... Floor surface, 8... Guide rollers, 9
...stopper piece, 9a...outer end, 9b...inner end,
10... Swinging rod, 10a... Rising piece, 11...
Bifurcated spring, 12...pressing rod, 12a...pressing piece,
13... Locking piece, 13a... Trailing edge.

Claims (1)

[Scope of Claim for Utility Model Registration] A plurality of tiered floors of different heights, each of which is supported at both ends of a horizontally elongated base plate via pillars so as to be movable back and forth, are arranged so that the shorter one is located on the inner side. When in use, they are arranged in a stacked state, and when in use, they are unfolded in a step-like manner, with the lowest step floor at the forefront, and when not in use, the front step beds are housed one after another inside and below the rear step beds. In the stepped movable bleachers, the inner ends of the carriages other than the innermost carriage are fixed to the stopper pieces located directly above the adjacent carriages, and the inner ends of the carriages other than the innermost carriage are fixed to the stopper pieces located directly above the adjacent carriages, and Immediately after the outer end of the stopper piece of the truck, the rear end is pivoted to the truck, and is rotated forward and upward under the bias of a spring, so that the center part of the upper edge touches the stopper piece of the truck adjacent to the outside. A swinging rod is provided at the same height as the inner end of the piece, and a free end protruding outward is adjacent to the lower front of the pillar other than the outermost pillar among the pillars installed at the rear of the truck. The push rod is located directly above the truck and is designed to push down the swing rod from the inner end of the stopper piece when the truck moves and reaches above the swing rod of the stopped outer truck. and a step-shaped locking piece whose front end is pivotally supported on the base of the pressing rod, and which rotates downward under its own weight and engages with the front edge of the stopper piece when the stopper piece is climbed over from behind. Expansion control device for movable bleachers.