JPH0431950Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a raised seating system installed in a multipurpose event hall, etc.

(Prior art) To explain the conventional undulating type bleachers with reference to FIGS. 4 and 5, A is the undulating type bleacher seat, 1 is the floor plate, 2 is the chair storage space below the floor plate 1, and 3 is the chair storage space 2. Support leg mounting frame attached to the underside of the
Reference numerals 4 and 4 denote support legs, and the upper end of each support leg 4 is rotatably attached to the center of the support leg attachment frame 3 via a pin 14. Also 5a, 5a
is the cylinder for undulation, and 5b, 5b are the respective cylinders 5.
With the piston rod a, each undulating cylinder 5a
The upper ends of the support leg attachment frames 3 are rotatably attached to both ends of the support leg attachment frame 3 via pins 11a. In addition, 7a and 7a are the respective undulating cylinders 5a.
Telescopic drive motor attached to 8, 8 is the wheel, 9
9 is a rail that guides the movement of each wheel 8, and each rail 9 is laid on the floor surface EL of the underground pit,
The lower end of each piston rod 5b and the lower end of each support leg 4 are rotatably attached to each of the eight wheel axes. Further, 10a is a bracket fixed to the floor surface EL of the underground pit, 10 is a guide member, 13 is a pin for rotatably attaching the upper end of the guide member 10 to one of the support legs 4, and 10b
connects the lower end of the guide member 10 to the bracket 1.
As shown in Fig. 4, when the undulating seats A are stored in an underground pit and raised from the stored state where the floor plate 1 is aligned with the floor surface FL, each undulating cylinder is attached rotatably to the pin 0a. The telescopic driving motor 7a attached to the piston rod 5a is driven to operate each piston rod 5b in the extending direction, and each wheel 8
are moved along each rail 9 to rotate each undulating cylinder 5a, piston rod 5b, and each support leg 4 in the upright direction around each wheel 8, while the lower end of the guide member 10 is moved around the pin 10b. It rotates in the upright direction and guides the rotation of the support legs 4 in the upright direction about the eight wheel axes, so that the audience seats A can be uprighted.

(Problems to be Solved by the Invention) In the conventional folding type bleachers shown in FIGS. 4 and 5, the support leg attachment frame 3 is attached to the lower part of the chair storage space 2, and the center part of the support leg attachment frame 3 is attached to the lower part of the chair storage space 2. Each support leg 4 is attached to the support leg mounting frame 3, and the raising and lowering cylinders 5a are attached to both ends of the support leg mounting frame 3, and the lowering type bleachers A are lowered as shown in Fig. 4 and stored in the underground pit. Luffing cylinder 5a
By reducing the angle θa between and the support leg 4,
The depth of the pit is made to be as shallow as possible for cost reasons, and when raising the raised seats A from the collapsed state shown in Fig. 4, it is necessary to increase the initial thrust. There was a problem that the motor 7a had to be made larger.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems by attaching a cylinder mounting base to the underside of the floorboard, and drilling holes into the same bracket as the cylinder mounting base, which is vertically attached to the cylinder mounting base. A horizontal pin hole is located above the chair storage space below the floorboard, a support leg mounting frame is provided at the bottom of the chair storage space, and the upper end of the undulating cylinder and the connecting member are inserted into the horizontal pin hole of the cylinder mounting base. The other end of the connecting member and the upper end of the support leg are rotatably attached to the support leg mounting frame via a pin, and the lower end of the support leg is rotatably attached to the support leg mounting frame. The lower end of the piston rod of the above-mentioned undulating cylinder was rotatably attached via a wheel shaft, and one end of the guide member was rotatably attached to the intermediate part of the support leg via a pin, and fixed on the floor of the pit. It is characterized in that the other end of the guide member is rotatably attached to the bracket.

The object of the present invention is to miniaturize the motor for driving the extension and contraction of the undulation cylinder. Another object of the present invention is to provide an improved undulating type bleacher that can improve the rigidity of the legs of the undulating type bleacher.

(Function) As mentioned above, the folding type bleachers of the present invention are provided with a cylinder mounting base in the chair storage space, and the upper end of the raising cylinder is pivotally supported, so that when the folding type bleachers are folded down, Since the angle between the undulating cylinder and the support legs is larger than that of conventional models, the initial thrust required to raise the undulating seats is small, and a smaller motor can be used to drive the undulating cylinder's telescopic drive. become. Further, the undulating cylinder, the support leg, and the connecting member are connected via pins to form a triangular link mechanism, which improves the rigidity of the legs of the undulating audience seat.

(Embodiment) Next, the undulating type bleachers of the present invention will be explained with reference to an embodiment shown in Figs. 1, 2, and 3. A pair of cylinder mounting bases 5c (see Fig. 3) are provided in the section,
A support leg mounting frame 3 is provided at the bottom of the chair storage space 2 directly below the floorboard 1, and the cylinder mounting base 5
The upper ends of the undulating cylinders 5a, 5a and one end of the connecting member 15 are rotatably attached to the support leg mounting frame 3, and the other end of each of the connecting members 15 and each support leg are attached to the support leg mounting frame 3. The upper end of each supporting leg 4 is rotatably attached via a pin 14, and the lower end of each support leg 4 and the lower end of the piston rod 5b of each undulating cylinder 5a are rotatable via the wheel shaft 12 of the wheel 8. One end of the guide member 10 is rotatably attached to the intermediate part of one support leg 4 via a pin 13, and the guide member 10 is attached to a bracket 10a fixed on the floor surface EL of the underground pit.
The other end is rotatably attached via a pin 10b. In addition, 6 is a reduction gear, and 7 is a cylinder 5 for elevating.
A reduction gear 6 and a telescopic drive motor 7 are attached to the undulating cylinder 5a. Figures 3a and 3b show the cylinder mounting base 5.
The details of c are shown. A cylinder mounting base 5c is attached to the lower surface of the floorboard 1, and a bracket 5c1 vertically installed on the cylinder mounting base _5c and a horizontal pin hole _5c2 drilled in the bracket _5c1 are inserted into the chair storage space 2 below the floorboard 1. It is located above.

Next, the operation of the folding type seats shown in FIGS. 1, 2, and 3 will be explained in detail. When raising the raised seats A from the stored state shown in FIG. 1 in which the floorboard 1 corresponds to the floor surface FL,
The telescopic drive motor 7 attached to the piston rod 5a is driven to operate each piston rod 5b in the extending direction, and each wheel 8 is moved along each rail 9, and each undulating cylinder 5a, piston rod 5b, and each support leg 4 are moved. While rotating each wheel 8 in the upright direction,
The lower end of the guide member 10 is rotated in the upright direction around the pin 10b, and the rotation of the support leg 4 in the upright direction around the 8 wheel axles is guided, so that the bleachers A are raised up into the state shown in FIG. let Furthermore, when each undulating cylinder 5a is operated in the retracting direction from this state, each of the above-mentioned parts moves and rotates in the opposite direction and is housed in the state shown in FIG. 1. At this time, each undulating cylinder 5
Since the cylinder mounting base 5c of a is provided in the chair storage space 2, the angle between each undulation cylinder 5a and each support leg 4 is θ, that is, larger than the conventional angle θa, and the undulation cylinder 5a is larger than the conventional angle θa. A large space can be formed below the undulating cylinders 5a, and the telescopic drive motor 7 with a speed reducer 6 can be used for undulating the undulating cylinders 5a.
As shown above, the angle between a and each support leg 4 is θa<θ
As a result, the initial thrust of the folding seats A becomes smaller. In addition, each of the raising and lowering cylinders 5a, the support legs 4, and the connecting members 15 are connected via pins to form a triangular link mechanism, and the rigidity of the legs of the raising and lowering seats A is improved.

(Effects of the invention) As mentioned above, the folding type bleachers of the present invention are provided with a cylinder mounting base in the chair storage space, and the upper end of the raising cylinder is pivotally supported, so that when the folding type bleachers are folded down, Furthermore, since the angle between the erecting cylinder and the support leg is larger than that of the conventional one, the initial thrust when raising the erecting type audience seat can be reduced, and the driving motor for extending and retracting the erecting cylinder can be downsized. Further, the undulation cylinder, the support leg, and the connecting member are connected via pins to form a triangular link mechanism, which has the effect of improving the rigidity of the legs of the undulation type audience seat.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the folding type bleachers according to the present invention in a stored state, FIG. 2 is a front view showing the upright state, and FIG. 3a is a view taken from the arrow in FIG.
Fig. 3b is a side view of the cylinder mounting base, Fig. 4 is a front view showing the conventional folding type bleachers in the stowed state, and Fig. 5 is a front view showing the upright state. be. 1...floorboard, 2...chair storage space, 3...
Support leg mounting frame, 5a...Luffing cylinder,
5b... Piston rod, 5c... Cylinder mounting base, 5c ₁ ... Bracket, 5c ₂ ... Horizontal pin hole,
8...Wheel, 9...Rail, 10a...Bracket, 10b, 11, 13, 14...Pin, 12...
...Wheel axle, 15...Connection member.

Claims (1)

[Scope of utility model registration request] A cylinder mounting base is installed on the underside of the floorboard, and a bracket vertically installed on the cylinder mounting base and a horizontal pin hole drilled in the bracket are positioned above the chair storage space below the floorboard, and the lower part of the chair storage space is A supporting leg mounting frame is provided in the cylinder mounting frame, and the upper end of the undulating cylinder and one end of the connecting member are rotatably attached to the horizontal pin hole of the cylinder mounting base via a pin, and the connecting member is attached to the supporting leg mounting frame. The other end and the upper end of the support leg are rotatably attached via a pin, the lower end of the support leg and the lower end of the piston rod of the undulating cylinder are rotatably attached via a wheel shaft, and the support leg is rotatably attached via a wheel shaft. An up-and-down viewing platform characterized in that one end of a guide member is rotatably attached to the middle part of the pit via a pin, and the other end of the guide member is rotatably attached to a bracket fixed on the floor of the pit. seat.