JPH01158753U

JPH01158753U -

Info

Publication number: JPH01158753U
Application number: JP5434388U
Authority: JP
Priority date: 1988-04-22
Filing date: 1988-04-22
Publication date: 1989-11-02

Description

[Brief explanation of drawings]

第１図乃至第６図は本考案の実施例を示す説明
図であり、第１図及び第３図は要部側断面作動説
明図、第２図は第１図の―断面図、第４図は
ロツク機構の変形例を示す要部側断面図、第５図
は観覧席の概略全体側面図、第６図は第５図の
―矢視図、第７図及び第８図は従来例を示す説
明図である。１は台枠、２は車輪、３は台車、４は支柱、５
はデツキ、７は椅子、９は支軸、１０は支脚、２
３は椅子連結部材、２５は起立・転倒装置、２６
はロツク機構、２７はアーム、２８はピン、２９
はローラ、３０，３１はスプロケツト、３２はチ
エーン、３５は引張ばね、３６はカムプレート、
３７はストツパ、３８は係止部材、３９は凸部、
４０はフツクを示す。 1 to 6 are explanatory diagrams showing an embodiment of the present invention, FIGS. 1 and 3 are side cross-sectional operation explanatory diagrams of main parts, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. The figure is a sectional side view of the main part showing a modified example of the locking mechanism, Figure 5 is a schematic overall side view of the bleachers, Figure 6 is a view taken along the - arrow in Figure 5, and Figures 7 and 8 are conventional examples. FIG. 1 is the underframe, 2 is the wheel, 3 is the trolley, 4 is the support, 5
is a deck, 7 is a chair, 9 is a support shaft, 10 is a support leg, 2
3 is a chair connecting member, 25 is a standing/falling device, 26
is the lock mechanism, 27 is the arm, 28 is the pin, 29
is a roller, 30 and 31 are sprockets, 32 is a chain, 35 is a tension spring, 36 is a cam plate,
37 is a stopper, 38 is a locking member, 39 is a convex portion,
40 indicates a hook.

Claims

[Scope of utility model registration request]

A plurality of carts each consisting of a pair of underframes, each of which can run in the front-rear direction and whose left and right widths are successively reduced, are arranged so that they can be stored in a nested manner, and on each of the carts, the carts of different heights are sequentially arranged at the required pitch. In a retractable staircase-like bleachers, a lowering deck is integrally provided, and on each deck, chairs that can stand up and fall down are arranged integrally on supporting legs that can rotate around a supporting shaft. , a cam plate is fixed to the front end of the lower surface of the deck, an arm is rotatably fitted to the support shaft and a sprocket is fitted, and a pin parallel to the support shaft is attached to the tip of the arm. A rotatable roller and a sprocket that rotates integrally with the roller are provided, a chain is endlessly routed around both sprockets, and the arm is rotated in a direction to press the roller against the cam plate. A biasing elastic member is provided, and a stopper is provided on the deck to limit rotation of the arm by the elastic member so that the roller does not come into contact with the lower surface of the deck to which the cam plate is not fixed. This is a device for standing up and overturning stairs-shaped bleachers.