JPH0418426Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a method for extending the seats when temporarily constructing them in a theater or a gymnasium, etc.
Chairs in telescopic movable bleachers, where the seats are configured in a stair-like manner with the chairs standing up, and when not in use, the chairs can be laid down and the seats can be expanded and contracted to be stored in a corner of the room. The invention relates to a levitation device.

BACKGROUND TECHNOLOGY Conventionally, when it is desired to temporarily install bleachers in a theater or gymnasium, etc., the bleachers are extended and
A chair in a telescopic movable bleacher seating structure in which the seats are configured in a step-like manner with the chairs standing up, and when not in use, the chairs can be laid down and the bleacher seats can be retracted and stored in a corner of the room. The luffing device is
For example, it is known from Japanese Utility Model Application Publication No. 59-67452, etc., and its configuration is that it is installed on the deck of the seating units that make up each tier, and that it is connected to or independently before and after the seating units of the tier. A rotating arm whose base end is integrally attached to a drive shaft for raising and lowering a chair that rotates in forward and reverse directions, one end of which is pivotally connected to the free end of this rotating arm and extends forward, and the other end of which is connected to the It consists of a V-shaped bending arm that is pivotally mounted above the pivot point of the supporting leg.

Problems to be Solved by the Invention By the way, in the above-mentioned conventional chair raising and retracting device for movable seats, the bending arm that raises and lowers the support leg is long, and the bending arm that raises and lowers the support leg is long, and the bending arm that raises and lowers the support leg is long, and the bending arm that raises and lowers the support leg is long. Since it moves a lot, it impairs the stability of its operation and tends to cause wobbling.

Means for Solving the Problems Therefore, the present application provides a revolving link rod whose base end is pivotally attached to the drive shaft and a locking pawl extending from the free end, and a free movement of the revolving link rod. a driven link rod having one end rotatably pivotally connected to the end and extending rearward; a rear end rotatably pivotally connected to the other end of the driven link rod, and an intermediate portion slidably connected to the drive shaft. a long sliding link rod having a longitudinally long sliding hole that is movably fitted, the front end of the sliding link rod being connected to an upper position away from the pivot point of the supporting leg, and , the defect of the conventional one is improved by providing the driven link rod with an engaging pin that engages with the locking pawl when the supporting leg is erected.

Examples and their effects Embodiments of the present application will be described in detail below with reference to the drawings.

In Figures 1 and 2, 1A, 1B, 1C,
1D has different heights in stages, expanding in stages and contracting in a vertical shelf shape.
This figure shows the bleacher units that are interconnected and connected to each other.

That is, each of these spectator seat units 1A to 1D is composed of a bogie underframe 2 and a horizontal deck 3 attached to the upper part of these. A pair of left and right leg stands 5 provided at the bottom, a pair of left and right columns 6 erected upward from the rear positions of these left and right leg stands 5, and a pair of left and right columns 6 extending forward from a midway position near the upper end of the left and right leg stands 6. It is composed of horizontally protruding left and right support beams 7, and the deck 3 is horizontally installed on the left and right support beams 7.

In addition, the bogie frame 2 of each of the abovementioned tiers of spectator seat units 1A to 1D is constructed such that its vertical height gradually decreases from the rear tier to the front tier, and the horizontal width ( The mutual spacing between the pair of left and right leg stands 5 is configured to gradually narrow from the rear to the front, and the front unit 1A is moved forward electrically or manually by an operator.・By retreating, each unit is configured so that it can expand in a step-like manner or contract in a vertical shelf-like manner in relation to each other. In addition,
Left and right supports 6 of the bogie frame 2 of each unit body 1A to 1D
Guide rollers 8 are attached to the upper ends, respectively, so as to guide and support the left and right support beams 7 of the truck underframes 2 of each subsequent stage unit from below.

A flip-up type chair 9 is provided above the deck 3 of each stage of the bleacher unit units 1A to 1D of the extendable stair-shaped bleachers constructed as described above. As shown in Fig. 2, the chairs 9 have a large number of adjacent seating sections in a horizontal row, and the seating units 1 of each tier are arranged near the rear of the upper surface at intervals in the left and right direction. A plurality of supporting legs 12 are respectively erected via pivots 11 on the undulation mechanism section 10, which will be described later.
...and each of these supporting legs 12... with supporting hardware 1 at the upper end.
3, and a large number of columns 15 erected by fixing the lower ends of the connecting rods 14 at intervals in the longitudinal direction of the connecting rods 14. , a seat 16 pivotably supported between each of these columns 15, and an armrest 17 rotatably attached to the upper end of each column 15.
and a backrest 1 attached by connecting both side parts to the rear part of the armrest 17 and the rear part of the seat 16.
It is composed of 8...

In the normal state, this connected chair 9 is in a flat state with the seat 16 and armrests 17 being vertical and the backrest 18 being folded, and when the seated person pushes down the seat 16 from this state, the seat 16 is almost flat. When the user lies down horizontally, the armrest 17 is supported horizontally, allowing the user to sit down.

Each of the supporting legs 12 of the above-mentioned connected chair 9 is rotatable around the pivot 11 of the up-and-down mechanism section 10, and the up-and-down mechanism section 10 is connected to the makeup box 19.
It is stored inside. The undulation mechanism portions 10, 10
A power unit 20 equipped with a gear motor and a reduction gear mechanism is arranged between the two, and its output shaft 21
is connected to a drive shaft 23 which is rotatably connected to the undulation mechanism section 10 through a coupling member 22 such as a coupling ring.

As shown in FIGS. 3 to 5, the undulating mechanism section 10 includes a pair of left and right bearing plates 24, which are covered with a decorative box 19 and fixedly installed on the deck.
The drive shaft 23 rotatably passes through the seat 24 in the left and right direction, and the drive shaft 23 passes through the chair 9 at a lower position spaced in front of the drive shaft 23.
A pivot shaft 11 supporting the lower end of the support leg 12 is rotatably supported horizontally in parallel with the drive shaft 23. Further, a rotary link rod 26 whose base end is pivoted via a mounting tube 25 and extends rearward so as to rotate together with the drive shaft 23, and a free end of the rotary link rod 26 has one end. A pair of relatively long left and right driven link rods 28 are rotatably connected via a pivot 27 and extend rearward, and a rear end portion is connected to the other end of the driven link rod 28 via a pivot 29. A pair of elongated left and right sliding link rods 3 which are movably pivoted and have a longitudinally long sliding hole 30 in which the drive shaft 23 is slidably fitted in the intermediate portion.
1, and the sliding link rod 31
is rotatably connected via a pivot 33 to a pivot piece 32 whose front end is fixed at an upper position slightly apart from the pivot 11 of the support leg 12, and also allows the pivot link rod 26 to have free movement. A locking claw 34 is extended at the end, and the locking claw 3 is extended when the supporting leg 12 is raised.
An engagement pin 35 that engages with the driven link rod 28 is attached to the driven link rod 28. 36 is a bush, 37, 38 and 39 are intervening rings, and 40 is a pair of left and right bearing plates 2.
4 and 24 are connected to each other.

In the telescopic movable bleachers with the above-mentioned configuration, when the motors of the power units 20 of each stage are rotated in the forward direction while the seats are extended in a stepwise manner as shown in FIG. In FIG. 3 showing the state, the rotary link rod 26 rotates clockwise, and the rotary link rod 26 integrated therewith also rotates in the same direction.
This allows the driven link rod 2 to
8 moves backwards while lying down. Therefore, in this state, the sliding link rod 31 is connected to the drive shaft 23.
While the sliding hole 30 is guided in sliding contact with the slide hole 30, it moves backward, and the supporting leg 12 rotates clockwise about the pivot 11 as a fulcrum and stands up as shown in FIG. The engaging claw 34 of the link rod 26 is engaged with the locking pin 35 of the driven link rod 28, and in this state, forward rattling acting on the supporting leg 12 is mechanically prevented. Note that this example shows a case in which the support leg 12 is configured to maintain its upright state at a position slightly tilted rearward from the vertical position.

Next, when the chair is to be laid down from the upright position shown in FIG. 4, the motors of the power units 20 of each stage are rotated in the opposite direction. Then the rotating link rod 26
rotates counterclockwise in Fig. 4, and
The locking claw 34 and the engagement pin 35 are disengaged, and the driven link rod 28 pivoted thereto is pulled forward while standing up, and the sliding link rod 3
1 moves forward as the sliding hole 30 is slidably guided by the drive shaft 23, and as a result of this forward movement, the supporting leg 12 rotates counterclockwise about the pivot 11 as shown in FIG. In this state, the drive shaft 23 and the rear edge of the sliding hole 30 abut each other. Note that in the above, a spring is additionally provided to constantly bias the supporting leg 12 in the upright direction.

Effects of the invention As described above, according to the present application, all the parts constituting the upright device are made up of linear link rods, and in particular, the sliding link that makes the support leg work upright is guided by the drive shaft and moved horizontally in the front and back direction. Since it has a movable structure, the movement is extremely smooth and stable, and the engagement between the locking pawl and the engagement pin reliably prevents the sliding link from moving in the front-back direction, so that it can not be applied to the supporting leg. It has the advantage of being able to sufficiently absorb loads in the front and rear directions, preventing the chair from rattling, and providing stable support for the chair.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a partially omitted plan view, FIG. 2 is a front view of the lowest row of seats, and FIGS. 3 and 4 are enlarged sectional views of main parts. Fifth
The figure is an enlarged cross-sectional view of the main part. In the figure, 1 is a bleacher unit, 12 is a supporting leg, 23 is a drive shaft, 26 is a rotating link rod, 28 is a driven link rod, 30 is a sliding hole, 31 is a sliding link rod,
34 is a locking pawl, and 35 is an engagement pin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Telescoping and movable bleachers that are provided in each tier of bleacher units and that raise and lower the supporting legs of chairs provided in the bleachers by forward and reverse rotation of a drive shaft. In the chair raising and lowering device, the raising and lowering device includes a rotary link rod whose base end is pivotally attached to the drive shaft and whose free end has a locking pawl extending therefrom, and a free movement of the rotary link rod. a driven link rod having one end rotatably connected to the end thereof and extending rearward; a rear end rotatably connected to the other end of the driven link rod; and the drive shaft in the intermediate portion. and a long sliding link rod having a longitudinally long sliding hole that is slidably fitted thereinto, and the front end of the sliding link rod is connected to an upper position remote from the pivot point of the supporting leg. A device for raising and lowering a chair in a telescopically movable spectator seat, characterized in that the driven link rod is provided with an engaging pin that engages with the locking pawl when the supporting leg is erected. (2) A utility model registration claim in which a rotating link rod is pivoted at an intermediate position of a drive shaft, a driven link rod is located at the left and right positions of the rotating link rod, and a sliding link rod is located at the left and right positions of the rotating link rod. A device for raising and lowering chairs in the telescoping and movable bleachers according to scope 1.