JP3173491B2 - Moving bleachers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable seat used in a gymnasium or a multipurpose hall.

[0002]

2. Description of the Related Art Recently, various types of movable seats for multipurpose use in a gymnasium or the like have been developed. This kind of movable bleachers can be set up in the hall or removed as necessary, so that a plurality of bunk floors with different heights advance forward when in use and are deployed in the shape of a bed, And is stored in the storage space in a superposed state.

[0003] In many cases, chairs are arranged on these corrugated floors so that they can be turned upside down. At that time, the conventional one
In general, drive shafts are incorporated in each floor, and the chairs are linked to the drive shafts so that the chairs can be automatically raised or lowered by electric drive.

[0004]

However, such a system has a drawback in that the cost and cost of the components and control system for electric motorization are high, and in particular, the movable seats become relatively expensive as they become relatively small. is there.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention minimizes the operation of a mechanism for raising and lowering a chair for a relatively small moving spectator seat. It is decided to make it manual without complicating it.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The movable spectator according to the present invention has a plurality of floors that advance forward when used, are deployed in a nested bed shape, retracted rearward when stored, and stored in a superposed state,
And a chair which is disposed on the floor so that the chair can be turned upside down, wherein a movable mooring member is provided at the chair or at a portion which operates together with the chair, and the movable mooring member is provided when the chair is erected. By engaging the fixed mooring portion provided on the bunk floor side by its own weight to lock the chair in the upright posture, and when the bunk floor is retracted, the movable mooring member is urged to the rear bunk floor. The chair is characterized in that it is disengaged from the fixed mooring portion and the chair can be laid down by its own weight.

In this structure, when the chair is artificially erected, the movable mooring member engages with the fixed mooring portion on the floor side by its own weight, and the chair is stably locked in the upright posture. When the moving floor is retracted when the floor is retracted, the chair is urged by the rear floor that relatively protrudes forward and the lock is released,
After that, the falling motion is performed by its own weight. Therefore, if only the operation of raising the chair by manipulating an appropriate part is carried out in this movable bleacher, the chair can be locked, unlocked or folded without the need for any artificial work like the electric type. It can be carried out.

In a specific embodiment, the movable mooring member is pivotally mounted around a pivot point, and when the chair stands up, its center of gravity exceeds the pivot point, so that the movable mooring member rotates by its own weight and is fixedly moored. And the chair is configured to maintain its state of disengagement from the fixed mooring portion when the chair falls down, when its center of gravity exceeds the pivot point again.

In order to simplify the construction, it is preferable that the fixed mooring portion is a horizontal mooring pin and the movable mooring member has an engaging claw that can be disengaged from the horizontal mooring pin from above. In order to smoothly dissociate the movable mooring member, a roller is attached to the movable mooring member via a horizontal support shaft, and the movable mooring member is urged through the roller to the subsequent step floor. What constitutes is suitable.

[0010] In order to safely perform the falling motion of the chair, it is desirable to provide an operation suppressing mechanism for suppressing the falling motion of the chair between the chair and the floor. Among these, in order to simultaneously reduce the operating force when the chair is standing up, the operation suppressing mechanism includes a spring element that stores the repulsive force through the elastic deformation of the member when the chair is lying down and shows resistance to the falling down movement. What you do is convenient.

In this case, in order to more appropriately control the falling speed of the chair and effectively prevent hunting by a spring, the operation suppressing mechanism reduces the resistance to the falling operation by compressing the members themselves when the chair is lowered. It is also desirable to have the damper elements shown.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the movable seat has a plurality of steps 1 having different heights, and these steps 1 are advanced forward when used as shown in FIG. The storage frame S is retracted rearward as shown in FIG. 2 during storage and is stored in the storage space S in a superimposed state. The drive system for moving the frame forward and backward has basically the same structure as that of the related art, and a description thereof will be omitted.

A unit case 2 is provided at the rear of the bunk floor 1, and a chair 3 is attached to the unit case 2 via a horizontal support shaft P1 so as to be able to move up and down.
The unit case 2 is, as shown in FIGS.
A channel-like support rod 41 is rotatably mounted on the upright wall 21 via the horizontal support shaft P1 so as to be rotatable. A beam 43 is attached to the rotating end of the rod 41 via a bracket 42 in a horizontal state, and a plurality of chairs 3 including an armrest 31, a seat 32 and a backrest 33 are arranged and supported in the longitudinal direction of the beam 43. That is, the support rod 41
Are pivoted about the horizontal support shaft P1 so that the plurality of chairs 3 are simultaneously moved up and down through the beam 43. The armrest 31, the seat 32 and the backrest 33 are provided.
Is set so that the center of gravity M of the chair 3 when it is folded and erected is located almost directly above the horizontal support shaft P1.

In this embodiment, in this embodiment, a movable mooring member 5 is provided on a portion which operates together with the chair 3, that is, in this embodiment, a support rod 41, and a horizontal mooring which is a fixed mooring portion is provided on the step floor 1 side. A pin 6 is provided, and when the chair 3 is erected, the movable mooring member 5 is engaged with the horizontal mooring pin 6 by its own weight to lock the chair 3 in the upright posture, and when the floor 1 is retracted. , Its movable mooring member 5
Is urged against the bunk floor 1 on the rear stage side to disengage it from the horizontal mooring pin 6, and the chair 3 can be folded down by its own weight.

More specifically, the movable mooring member 5 is
A U-shape in which a pair of side walls 51 are connected by a connecting plate 52 is disposed between a pair of side walls 41a at a substantially central portion in the longitudinal direction of the support rod 41, and the side walls 51 are connected via a horizontal support shaft P2. The supporting rod 41 is pivotally connected to a corresponding portion of the side wall 41a. And those side walls 51
In addition, an engagement claw 53 is formed at an edge on the clockwise side with respect to the horizontal support shaft P2. The movable mooring member 5 has a center of gravity m ahead of the horizontal support shaft P2 when the chair 3 is in the lying posture, but the center of gravity m is set while the chair 3 is rotated to a predetermined standing posture. It is set so as to pass right above the horizontal support shaft P2 and move rearward. With the movement of the center of gravity, the engaging claw 53 is turned upward in the falling posture and rotated by its own weight in the standing posture. It is set so that it faces backward and downward. On the other hand, a horizontal mooring pin 6 protrudes from the upright wall 21 of the unit case 2, and when the movable mooring member 5 rotates with the upright operation of the chair 3, the engaging claw 53 is moved horizontally. The mooring pin 6 can be automatically engaged from above. A horizontal support shaft 5 is provided between the rear upper portion of the pair of side walls 51 of the movable mooring member 5.
A roller 54 is rotatably mounted on the shaft via the roller 4a, and the rear end surface 54b of the roller 54 is connected to the rear end surface 41 of the support rod 41.
a and the side wall 51 is disposed at a position protruding rearward from the rear end face 51a. When the floor 1 is retracted, the rear end surface 54b of the roller 54 is urged against the front end surface 1a of the rear floor 1 which protrudes relatively forward, and the engaging claw 53 Can be disengaged from the horizontal mooring pin 6. The movable mooring member 5 disengaged from the horizontal mooring pin 6 is further urged to the subsequent step floor 1 so that when the center of gravity m passes right above the horizontal support shaft P2 again, its own weight counterclockwise. To maintain the posture in which the engagement claws 53 face upward.

Further, in this embodiment, between the chair 3 and the bunk floor 1, there is provided an operation suppressing mechanism 7 for suppressing the falling operation of the chair 3. The operation suppressing mechanism 7 is provided with the horizontal support shaft P1.
A first retainer 71 pivotally connected to the support rod 41 via a horizontal shaft 71a at a lower end side, and a first retainer 71 pivotally connected to the upright wall 21 of the unit case 2 via a horizontal shaft 72a, and a part thereof is A second retainer 72 slidably loaded with a shaft 73 protruding from the first retainer 71;
The first and second retainers 71 and 72 are externally fitted to the shaft 73 and are elastically deformed in the compression direction when the distance between the first and second retainers 71 and 72 approaches a certain distance or more. A coil spring 74 which is a spring element showing resistance to the coil spring 74 and the shaft 73
And a urethane damper element 75 made of urethane, which is compressed when the distance between the retainers 71 and 72 is more than a predetermined distance, thereby compressing the member itself and thereby resisting the falling motion of the chair 3. are doing. The coil spring 74 and the damper element 75 are set to a substantially free length when the chair 3 stands up, and the movable mooring member 5 is
The chair 3 is set to be compressed by an appropriate amount after the chair 3 starts to fall down and reaches the lying down position after the chair 3 is disengaged.

As described above, the movable spectator seat of the present embodiment includes the movable mooring member 5 on the support rod 41 operating together with the chair 3.
When the chair 3 is raised, the movable mooring member 5 is engaged by its own weight with a horizontal mooring pin 6 which is a fixed mooring portion provided on the side of the floor 1 to lock the chair 3 in the standing posture, When the bunk floor 1 is retracted, the movable mooring member 5 is urged to the rear bunk floor 1 to disengage it from the horizontal mooring pin 6, and the chair 3 can be laid down by its own weight.

For this reason, when the chair 3 is artificially erected, the movable mooring member 5 engages with the horizontal mooring pin 6 on the side of the floor 1 by its own weight, and the chair 3 is stably locked in the upright posture. When the floor 1 is retracted when the movable seat is stored, the chair 3 is urged by the floor 1 on the rear side, which relatively protrudes forward, and the lock is released. After that, the falling motion is performed by its own weight. Therefore, if only the operation of raising the chair 3 by manipulating an appropriate part is performed on this movable seat, the chair 3 can be locked, unlocked or unlocked without any artificial work like the electric type. The folding can be performed, and the operation can be made as simple as possible, and the components and control system required for the electrification can be eliminated, and the entire movable seat can be configured at a low cost.

In particular, the movable mooring member 5 is pivotally mounted around a horizontal support shaft P2, which is a pivot point, and when the chair 3 stands up, its center of gravity m passes over the horizontal support shaft P2 so that it can be rotated by its own weight. To engage with the horizontal mooring pin 6 and maintain the state of disengagement from the horizontal mooring pin 6 when the chair 3 falls down by moving the center of gravity m over the horizontal support axis P2 again. Although having a simple configuration, the movable mooring member 5 can be reliably operated with the raising / lowering operation of the chair 3.

In particular, a structure in which the horizontal mooring pin 6 is employed as the fixed mooring portion and the movable mooring member 5 is provided with an engaging claw 53 which can be disengaged from the horizontal mooring pin 6 from above is particularly useful in such a structure. The structure is simply realized. In addition to the above, in this embodiment, the movable mooring member 5
Since the roller 54 is axially attached via the roller 4a and the movable mooring member 5 is urged through the roller 54 to the subsequent step floor 1 without causing a caught or the like,
The disengagement operation of the movable mooring member 5 can be smoothly performed using the operation of the bunk floor 1.

Further, since the motion suppressing mechanism 7 for suppressing the falling motion of the chair 3 is provided between the chair 3 and the bunk floor 1,
Even when the chair 3 is configured to fall down by its own weight, the chair 3 does not fall down at once, and the falling down operation can be performed safely and properly. Its operation conversion mechanism 7
Also, the chair 3 is provided with the coil spring 74 exhibiting resistance to the falling motion while accumulating repulsive force through elastic deformation of the member when the chair 3 falls down. By using the repulsive force accumulated in the vehicle, it can be effectively reduced, and the standing operation can be simplified.

In addition, a damper element 75, which exhibits resistance to the falling motion through the compression of the member itself when the chair 3 falls, is also added to the motion suppressing mechanism 7, so that the chair 3 cannot be well controlled by the coil spring 74 alone. The lodging speed can be appropriately controlled by the damper element 75, and the hunting operation of the chair 3 through the coil spring 74 after the chair 3 has once fallen can be effectively prevented by the damper element 75.

The specific shape of each part is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0024]

The movable spectator according to the present invention has the above-described structure, and thus has the following effects.
That is, the present invention provides a general structure for a movable seat of this type, wherein a movable mooring member is provided at a chair or a portion operating together with the chair, and the movable mooring member is provided along with the standing operation of the chair. Is automatically engaged by its own weight with the fixed mooring portion provided on the floor side, and the movable mooring member is urged to the subsequent floor side to disengage from the fixed mooring portion with the retreat operation of the floor floor. The chair is configured to be able to fall down by its own weight.

For this reason, this movable seat only requires the operator to operate the appropriate part of the chair to raise the chair, but does not require any artificial work like the electric type. The chair can be locked, unlocked or folded, without compromising good usability, eliminating the need for components and control systems required for electrification, and in particular, inexpensively constructing small-scale mobile bleachers It becomes possible.

In the case where the movable mooring member is pivotally attached to the chair around the pivot point and the center of gravity of the chair reciprocates beyond the pivot point in accordance with the raising / lowering operation of the chair, a simple configuration is adopted. However, the movable mooring member can be reliably operated with the raising and lowering operation of the chair. If the fixed mooring portion is a horizontal mooring pin and the movable mooring member is provided with an engaging claw that is engaged with and disengaged from the horizontal mooring pin, the structure for disengaging and disengaging can be easily realized.

In addition to the above, if a roller is attached to the movable mooring member via a horizontal support shaft, and the movable mooring member is urged to the subsequent step floor via the roller, the movable mooring member can be provided with a roller. The disengagement operation of the movable mooring member can be performed smoothly even by using the operation. In addition, if a movement suppression mechanism is provided between the chair and the floor that suppresses the chair's lodging operation,
Even if the chair is configured to fall down by its own weight, the falling down operation can be performed safely and appropriately.

If the motion converting mechanism is provided with a spring element which shows resistance against the falling motion while accumulating repulsive force when the chair falls down, the force when standing up the chair is assisted by this spring element. Thus, the standing operation can be simplified. In addition, if the motion restraining mechanism also includes a damper element that shows resistance to the falling motion through the compression of the member itself when the chair falls, if the spring element alone is used, it is difficult to control the falling speed of the chair or the chair once falls down. It is also possible to effectively prevent the hunting operation of the chair afterward.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention in a state in which a corrugated floor is developed in a nested bed shape.

FIG. 2 is a side view of a stored state corresponding to FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is an enlarged view of a main part of FIG. 3;

5 is a view taken in the direction of the arrow A in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Step floor 3 ... Chair 5 ... Movable mooring member 6 ... Fixed mooring part (horizontal mooring pin) 7 ... Operation suppression mechanism 53 ... Engagement claw 54 ... Roller 54a ... Horizontal support shaft 74 ... Spring element (coil spring) 75 ... Damper element m: center of gravity P2: pivot point (horizontal support axis)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 3/12 A47C 1/126

Claims (7)

(57) [Claims] 1. A plurality of floors which advance forward when used and are deployed in a nested bed shape, retracted rearward when stored, and stored in a superposed state, and are disposed on these floors so as to be capable of falling. A movable mooring member is provided at the chair or at a portion operating with the chair, and when the chair is erected, the movable mooring member is moored by its own weight to a fixed mooring portion provided on the floor side. When the floor is retracted, the movable mooring member is urged to the subsequent floor to disengage it from the fixed mooring section, and the chair is folded down by its own weight. A moving bleacher, characterized in that it is constructed so as to be obtained. 2. A movable mooring member is pivotally mounted about a pivot point,
When the chair stands up, its center of gravity goes over the pivot point, so that it rotates by its own weight and engages with the fixed mooring part. The movable spectator according to claim 1, wherein the movable spectator maintains a state of being dissociated from the seat. 3. The fixed mooring portion is a horizontal mooring pin, and the movable mooring member is provided with an engaging claw that can be disengaged from above the horizontal mooring pin.
The described moving seat. 4. A structure in which a roller is axially mounted on the movable mooring member via a horizontal support shaft, and the movable mooring member is urged via the roller to the subsequent step floor. The moving seat according to claim 1, 2 or 3. 5. The movable seat according to claim 1, further comprising an operation restraining mechanism for restraining the chair from falling down, between the chair and the floor. 6. The movement according to claim 5, wherein the movement suppressing mechanism includes a spring element which stores a repulsive force through elastic deformation of the member when the chair is lying down and which exhibits resistance to the falling down movement. Bleachers. 7. The movable seat according to claim 6, wherein the movement restraining mechanism further comprises a damper element which exhibits resistance to the falling motion through compression of the member itself when the chair falls.