JPS62280456A - Moving seat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to movable viewing seats in a hall or the like used for multiple purposes.

(Prior art) In order to use a gymnasium, hall, or ground for multiple purposes, chairs arranged in a stepped manner are folded, and the tiered floor supporting the chairs is placed under the rear tiered floor in sequence. BACKGROUND OF THE INVENTION Mobile bleachers that are accommodated in cages are known.

Conventionally, in order to move in and out of these stepped floors, a large number of frame-shaped link plates with wheels attached to their undersides were connected in a straight line to each other, and wires connected to these link plates were connected to the outer periphery of the drum. By winding it up in a spiral, the first floor is stacked backwards.

By reversing the drum and stretching the link plates in a straight line, the one-tiered floor was developed in a stepwise manner.

(Problems to be Solved by the Invention) The conventional device described above has problems such as the complicated structure of the link plate, high cost, and the need for a large amount of power to index the wires. there were.

(Means for Solving the Problems) The present invention provides for
The purpose of the present invention is to provide movable spectator seats whose tiered floors are movable, thereby simplifying the structure.

That is, in the movable viewing room of the present invention, the tiered floor on which the chairs are placed is connected to each other so that the seating can be pulled out, and the movable viewing room has a winding drum and one end provided on the rearmost side of the tiered floor. a storage cable that is wound around a winding drum, the other end of which is fixed to the step bed in the front row; The winding drum is equipped with a drawer cord that is wound sequentially between fixed wheels provided on each step floor so as to form a step-like shape when pulling out the drawer, and then fixed to the front row step floor. By rotating in the forward or reverse direction, the tray can be pulled out or stored while reducing the load on the deck.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

(1), (2), (3), and (4) are four tiered beds that are arranged in parallel in the front-rear direction in this order so that the front side is successively lower.

At the trailing edge of each floor (la) (2a) (3a) (4a) is a back plate (lb) (2b) (3b), respectively.
(4b) is erected and has an L-shaped side profile.

Also, each floorboard (la) (2a) (3a) (4a)
On the lower surface of the rear end, there is a leg member (LC) whose planar shape has a U-shape facing forward, and whose height and width gradually become narrower toward the rear, allowing the insertion of a pup. 2c)
(3c) and (4c) are fixed in pairs on the left and right, respectively.

Wheels (5) are attached to the front and rear of the lower ends on both sides of each leg member (lc) (2c) (3c) (4c).

Furthermore, there are legs (
7a) The lower ends of (7a) are horizontal rods (6) in the left and right direction.
A large number of chairs (7) connected with each other are arranged symmetrically except for the central aisle (8).

At important points on the horizontal rod (6), there is a downward lever (11).
is fixed, and the lower end of the lever (11) is fixed to each step floor (1) (
2) Base (9) fixed to the upper surface of the rear end of (3) and (4)
It is pivotally connected to rotation # (10) that passes horizontally through the.

By rotating the rotation shaft (10) by a drive means (not shown), each chair (7) is rotated from the upright position shown in FIG. 2 to the reclined position shown in FIG. 3. .

Next, from the position of use of the bleachers shown in Figure 2, each tier (
The moving mechanism (12) for moving items 1, 2, 3, and 4 to the storage position shown in FIG. 3 will be explained.

In Fig. 2, (13) is a fixed pulley that protrudes rearward from the rear edge of the central part of the step bed (4), and (14) is
This is a fixed pulley provided on the lower surface of the step bed (3) above the step bed (4), facing the fixed pulley (13).

Similarly, a fixed pulley (15) is provided on the rear edge of the step bed (3), and similar fixed pulleys (16) (+7) are provided on the lower surface and rear edge of the step bed (2) located behind it. A fixed pulley (18) is provided on the lower front surface of the rearmost step bed (1).

(19) is a fixed pulley attached to the inner wall (20) of the building behind the fixed pulley (18); (21) is
Below this fixed pulley (19) is a winding drum provided on the floor (22).

A small drum (21a) and a large drum (21b) are fixed side by side to the - side of the shaft (23) of the winding drum (21), and the other side of the shaft (23) is equipped with, for example, a motor for forward and reverse rotation. Drive means consisting of a possible motor (24) are connected.

(25) is a storage cable, for example, a storage wire, and its front end is attached to a mounting frame (26) having an upwardly U-shaped front view, which is suspended from the center of the floorboard (4a) of the foremost step floor (4). Similarly, the rear end is fixed to the outer periphery of the large drum (21b) via the lower side of the large drum (21b).

(28) is a pullout wire, for example, a pullout wire, one end of which is wound around the small drum (21a) and fixed to the outer periphery of the small drum (21a); Extending upward from the drum (21a), the fixed pulley (19) is wound around the fixed pulley (19) from behind, and then the fixed pulley (18) (1
7) (16) (15) (14) (13) are wound in this order from front to back to form a bellows shape when stored, and are stretched forward so as to form a step-like shape in the drawer. After that, it is fixed to a stopper (29) attached to the lower surface of the floor plate (4a) of the stepped floor (4).

(30) is a stopper provided on the floor (22), which prevents the stepped floor (1) from moving rearward.

Next, the operation of the above-mentioned movable bleachers will be explained.

When the person sitting on each chair (7) leaves the drawer position shown in FIG. (omitted), rotate the entire chair (7) forward to bring it to a horizontal position.

After that, the motor (24) is rotated forward, and the winding drum (21) is rotated forward.
) is rotated counterclockwise in Fig. 2, the storage wire (25) is wound around the large drum (21b) as shown by the arrow, and at the same time the pull-out wire (28) is unwound and removed from the bunk bed. (4) is attached to tiered floor (3), tiered floor (3) is attached to tiered floor (2),
The tiered floor (2) and the tiered floor (1) are respectively housed to the rear, and as shown in FIG. 3, the lead-out wire is in a retracted state in a bellows shape between the fixed pulleys.

When the motor (24) is reversed, as shown by the arrow in FIG.
5) The gaps between (16) and fixed pulleys (13) and (14) become smaller. In other words, as shown in Fig. 2, the pull-out wires are arranged in a stair-like manner between the fixed pulleys, and the step beds (2), (3), and (4) are sequentially pulled forward into the putter, and at the same time, the wires are pulled out to the front. The wire (25) is pulled forward.

At this time, each back plate acts as a stopper to prevent the front tier from slipping out of the rear tier.

When the drawers of the steps (2), (3), and (4) are finished, the chair (7)
Stand up, unfold the seats, and use them as 'lfl seats.

If the relationship between the forces required for pulling out and storing the movable bleachers according to the present invention is introduced into the general equation, the following equation will be obtained.

If the load on the step bed is W, the pulling force is F, and the friction coefficient of the floor surface is μ, then F = μ·W.

Then, the force to move the load (W), that is, the pull-out force as shown in Figure 5, is [Ft], and the force in the opposite direction to the load is CF.
up], as shown in Figure 6, Ft =
(W −Fup) μ −−−−−−−−(1) As shown in Figure 4, the force applied to the wire when pulling out is (F
s), and if the pulling angle is (α), then h −a α 2 □ Fup = Fs − sin α −−−−−−−(2) Also, Ft = COS α Fs Therefore, F t =: F 5 -cos a-
---'-(3) From (1) (2) (3), Fs 1coSa = (W - Fs 3sin α) μ
=W・μ−Fs Pot sinα・μ Fs(cosα+sinα)=W1μ The tension of the wire is CO8α+5inCt+μ.

(Modification) In the embodiment described above, a wire was used as the rope, but
When this is used as a chain, a sprocket is used in place of the fixed pulley and winding drum. It goes without saying that ropes, belts, etc. can be used as the cables.

The driving means may be manual rather than motorized, and the chairs on the step may be automatically folded by the driving means.

Furthermore, although the load on the tiers is reduced only when the tiers are pulled out, the load on the tiers is reduced even after the tiers are pulled out, that is, when in use.
By keeping the drawer cables under tension, the load on the deck can be reduced.

In this method, after the drawer is drawn out, a "weight" is hung on the drawer rope near the winding drum to apply tension, or a clutch is inserted between the large and small drums on the winding drum. The motor may be stopped while a large tension is applied to the cable.

(Effect of the invention) As described above in detail, the movable seats of the present invention are as follows.

Since the tiers are indexed or pulled out only via cables such as wires or chains, the mechanism for moving the tiers is simplified and the weight of the entire device is reduced.

In addition, when pulling out the bunks, the cables are inserted between the fixed wheels provided on each bunk, so when the cables are wound onto the winding drum, the tension of the cables causes an upward force opposite to the load. In addition, since the rear of each tiered floor rises upward, the load on each tiered floor becomes smaller, which has the advantage of reducing the load on the building floor.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a partially cutaway front view of an embodiment of the present invention, Fig. 2 is a right side view, and Fig. 3 shows the stepped floor in a stored state. Side view. Figures 4 and 5 are schematic side views for explaining the general formula for the force applied when pulling out the deck, and Figure 6 is a schematic configuration diagram for calculating the formula for the wire tension in Figure 4. It is. (1) (2) (3) (4) Step floor (la) (2a) (3a) (4a) Floor plate (lb)
(2b) (3b) (4b) Back plate (lc) (2c
) (3c) (4c) Leg material (5) Axle (
6) Horizontal rod (7) Chair (8) Passageway (9) Base (10) Rotating shaft (11) Lever (12) Movement mechanism (13) (14) (15
) (16) (17) (18) (19) Fixed pulley (fixed wheel) (20) Inner wall (21) Winding drum (22)
Floor (23) Axis (24) Motor (drive means) (25) Storage wire (storage cable) (26) Mounting frame (27) (29) Stopper (2
8) Pull-out wire (drawer cable) (30) Stopper

Claims (1)

[Claims] In a movable seating area in which the tiered floors on which chairs are placed are interconnected so that they can be pulled out and stored, the seat is wound around a winding drum, one end of which is provided at the rearmost side of the tiered floor, and a storage cable whose other end is fixed to the step floor in the front row;
One end is wound around the winding drum, and the other end is sequentially wound between fixed wheels provided on each step floor so as to form a bellows shape when stored and a step shape when pulled out;
It is characterized by comprising a drawer cable fixed to the front row bed, and by rotating the winding drum forward or reverse, it can be pulled out or stored while reducing the load on the bed. Mobile bleachers.