JPH035640Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a stopper device for an intermediate stage of a retractable staircase-like audience seat.

[Conventional technology]

In recent years, in order to use the interior of gymnasiums for multiple purposes, it has become common for gymnasiums to install retractable and movable tiered seats on a portion of the floor near the wall. This spectator seat is formed by interconnecting movable platforms consisting of a plurality of stages of increasing height so that it can be moved while expanding and contracting in the front and back direction. When these bleachers are in use, they are pulled out in sequence starting with the lowest movable platform at the front, extending the entire structure into a dais-like structure, allowing spectators to sit on the numerous chairs installed on each movable platform. state. When not in use, the whole unit can be placed under the top movable bed in the form of a vertical shelf by moving it backwards, starting with the first movable bed and returning it to the bottom of the rear movable bed. It was designed so that it could be reduced in size and stored in a storage space provided on the wall of the building.

[Problem that the invention attempts to solve]

The conventional telescopic stair-shaped bleachers with the above configuration had the following problems.

(1) The above seats are often used with the movable platform in the first half reduced in size, as not all the seats are needed when the event in the venue is small-scale and the number of spectators is small. At this time, since there is no special mooring means between the movable platforms on the first half side when used in a reduced scale and small scale, if a natural disaster such as an earthquake occurs during use in this state, individual tremors may be induced. However, this had the disadvantage that it spread to the movable platform in the second half, posing a danger to the audience.

[Means for solving problems]

This idea solves the above-mentioned problems of the conventional technology, and if the event held in the venue is small-scale, it is possible to use the first half movable platform moored as a whole from the beginning. To provide an intermediate step stopper device for a retractable stair-shaped audience seat, which does not shake even when subjected to a natural disaster such as an earthquake during use and can reliably guarantee the safety of spectators.
The feature of this invention is that in the bleachers, which are movable by extending and contracting in the front and back direction by interconnecting movable platforms consisting of multiple stages of increasing height, the beam ( (through material)
A locking plate having a rearward opening is installed on one side of the locking plate, and a locking pin is installed on one side of the locking plate in a removable manner. By fixing the stopper plate that goes in and out of the plate, and retracting the stopper plate into the lock plate when the front half base including the base is reduced and stored, and inserting and engaging the lock pin into the stopper plate. The first half side movable floor table can be fixed in the form of a vertical shelf.

[Effect]

When using the seats configured as described above, for example, if the event held at the venue is small and the number of spectators is small,
Before pulling out the above-mentioned seats, actuate the lock pin provided on the lock plate at the frontmost beam position and insert this pin into the above-mentioned lock plate. Since the stopper plate fixed to the locking brace installed on the base of the intermediate stage is retracted, the movable platform from the front stage to the intermediate stage can be moored to the unit by inserting the lock pin. I can do it. Therefore, when the seats are moved forward in this state, when the movable platform pulled out from the front stage moves forward, the movable platform at the frontmost stage and the movable platforms up to the intermediate stage are strongly connected as a unit. It will move forward under a vertical shelf. In this way, when the second half movable platform is extended like a dais with the first stage being the first stage from the first stage to the middle stage, the seats at the time of extension are connected to each other regardless of whether they are in the first half or the second half. The structure is very strong, and the last stage of the movable platform is moored to the position directly in front of the storage area by a separate means when pulled out, so even if there is a natural disaster such as an earthquake when using this state, it will not be damaged. The entire bleachers can easily maintain a stable mooring mode.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

First, to explain the configuration, as shown in FIGS. 1 to 3, the movable platform 5, which has multiple stages of increasing height, is connected to each other and moved by expansion and contraction in the front-rear direction. is equipped with rollers 2, and bases 1, 1 (the drawings only show the base 1 on one side) are placed on the left and right positions of each stage, and have support posts 3 erected on the top. Each base 1 according to this embodiment is connected to a unit by a horizontal beam 4 (only the first beam 4 is shown in the drawing) in each stage, and each movable platform 5 in each stage
The pillars 3 are arranged so as to be sequentially shifted toward the outside, and each pillar 3 is also formed to increase in height in turn. When in use, the movable bed 5 at the frontmost stage is successively pulled out to the front, so that the entire structure is shaped like a pedestal. , and when not in use, contrary to the above, it is returned from the movable platform 5 in the first stage to the bottom of the movable platform 5 in the last stage XI, and the whole is assembled into a compact unit in the shape of a vertical shelf. In the retractable stair-shaped bleachers that allow the bleachers A in this state to be stored in the storage area F behind them,
The following stopper device B is installed on the beam 4 at the forefront mentioned above and the base 1 at the intermediate stage.

The above stopper device B is constructed as follows. That is, as shown in FIGS. 2 and 3, hollow rectangular cube unit bars 6 are attached to the left and right positions on both sides of the beam 4, which is the forefront of the bleachers A, near the base 1. . Inside this unit cover 6, there is an opening 7 facing the rear.
An inverted U-shaped lock plate 7 having an inverted U-shape 7a is fixed in such a manner that the opening 7a is exposed to a part of the unit cover 6. Guide bushes 8, 8 are fitted on the left and right vertical surfaces of the lock plate 7. In this embodiment, on the side surface of the lock plate 7 on the base side, a lock pin 10 having a rack formed on the back surface that engages with a pinion (not shown) on the drive source 9 side is attached to the position of the guide bushes 8, 8 by the operation of the drive source 9. It is provided so that it can be inserted into and removed from the lock plate 7. Further, between the left and right bases 1, 1, which are the middle stage of the spectator seat A, a locking brace 11 is provided with a length that can be placed on both the bases 1, 1. A front-facing mounting bracket 12 having a U-shaped cross section is fixed to the left and right positions corresponding to the lock plate 7 on this locking blaze 11, and the front end of this mounting bracket 12 is attached to each base in the first half side stage. A stopper plate 13 is fixed in a vertical arrangement so as to be retracted into the lock plate 7 at a position slightly beyond the insertion/removal line of the lock pin 10 when the lock pin 1 is stored. When the stopper plate 13 as described above is retracted into the lock plate 7, if the lock pin 10 is inserted into the lock plate 7 by operating the drive source 9, all bases from the front stage to the middle stage will be removed. The platforms 1 are integrated into one unit, so that the movable platforms 5 up to 5 move forward and backward all at once. Note that 14 shown in FIG. 1 is a chair that is erected when the viewing seat A is used.

When using the bleachers A with the above configuration, for example, if the event being held in the venue is small-scale and the number of spectators is small, each lock pin 10 of the stopper device B should be (In other words, the lock pins 10 provided on one side of each lock plate 7 attached to the left and right positions of the beam 4 corresponding to the foremost stage) are actuated by the operation of the drive source 9 for each position, and these pins 10 are connected to each other by operating the drive source 9 for each position. When inserted into the lock plate 7, each stopper plate 13 fixed at the left and right positions of the lock brace 11 installed between the intermediate stage bases 1 and 1 at this point locks the lock plate corresponding to each position. 7
Since the bases 1 are retracted inward, each base 1 from the front stage to the middle stage can be moored to the unit by inserting the lock pin 10. (See Figure 2) Each base 1 from the first stage to the middle stage as described above
When the seats A are moored to the bulk body, the seats A are moved to the front C side using the driving force of a cooperative transmission device (not shown), and each movable floor platform 5 is moved forward thereby. The movable platform 5 and the movable platforms 5 up to the intermediate stage move forward under a vertical shelf-like unit that is strongly connected by the above-mentioned stopper device B. Therefore, in the spectator seats A, each of the movable platforms 5 on the rear half side can be extended into a podium shape by having the first stage ranging from the frontmost stage to the middle stage. And, regardless of whether it is on the front or rear side, the extended seating area A has a strong connection between the movable floor platforms 5, and the movable floor platform 5 in the last stage XI is not shown in the figure when it is pulled out. Since it is moored at a position immediately before the storage location F by a separate connecting means, even if a disaster such as an earthquake occurs when the rear movable platform 5 is used, the rear movable platform 5 will be moored.
The entire bleachers A, including the seats A, can easily maintain a stable mooring mode without being shaken.

In the above embodiment, the intermediate stage base 1
A locking brace 11 is installed in between, and a stopper plate 13 that goes in and out of the locking plate 7 is placed on the locking brace 11. However, this invention is not limited to the above embodiment, and for example, the locking pin 10 can be When the provided lock plate 7 is installed adjacent to the base 1 at the forefront stage, the stopper plate 13 described above can be directly fixed to the base 1 at the intermediate stage to correspond to this. As a result, the same effects as in the above embodiment can be obtained without using the locking brace 11.

[Effect of idea]

This idea is based on a bleacher seat that can be moved by expanding and contracting in the front and rear directions by interconnecting movable platforms made up of multiple stages of increasing height. A locking plate having a locking plate is installed, and a locking pin is removably installed on one side of the locking plate, and a locking brace installed on the left and right bases of the middle stage of the audience seats is provided with a strainer that goes in and out of the locking plate. When the par plate is fixed and the front half base including the base is reduced and stored, the stopper plate is retracted into the lock plate, and the lock pin is inserted and engaged with the stopper plate to move the front half movable floor base. It is characterized by being able to be fixed in the form of a vertical shelf. Therefore, if the event held in the venue is small-scale, by mooring the first half of the movable platform to the entire body and moving it forward and backward, even if an earthquake occurs during use, the first half will be covered. All movable platforms in the rear half are prevented from shaking by the complete mooring means of the stopper device, which has the effect of ensuring the safety of the audience.

[Brief explanation of drawings]

Figure 1 is a side view of a retractable staircase-like bleacher seat equipped with an intermediate stopper device according to this invention, and Figure 2 shows the stopper device installed in the front G section of the bleacher seat and its operation mode as shown in Figure 3. FIG. 3 is a partially cross-sectional plan view taken along the line H--H, and a perspective view of the main part of the stopper device including metal. 1...Base, 4...Beam, 5...Moveable platform,
7...Lock plate, 7a...Opening, 10...Lock pin, 13...Stopper plate.

Claims (1)

[Scope of utility model registration request] In a bleacher seat that can be operated by expanding and contracting in the front and rear directions by interconnecting movable platforms that increase in height sequentially, a locking plate with an opening toward the rear is installed on the beam that is the frontmost step of the bleacher seat. ,
A lock pin for fixing the stopper plate is removably installed on one side of the lock plate, and a stopper plate that goes in and out of the lock plate is attached to locking braces installed on the left and right bases of the middle stage of the audience seats. When the front-half base including the base is reduced and stored, the stopper plate is retracted into the lock plate, and the lock pin is inserted and engaged with the stopper plate to move the front-half movable floor base to the vertical shelf. An intermediate stage stopper device for a retractable stair-shaped bleacher seat, characterized in that it can be fixed in a fixed position.