JPH0440529Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention consists of connecting a plurality of individual seats with deck heights that are sequentially different from the front to the rear.
When in use, the deck can be stretched out in a step-like manner to open the top surface of the deck, and when not in use, the short front bleachers can be stored under the deck of the tall rear bleachers, allowing them to be stored in a shelf-like manner. This invention relates to chairs that are incorporated into movable bleachers.

[Conventional technology] Multiple bleacher seats with different deck heights are connected in front and back, stretched out like a staircase when in use, and when not in use, the front seat is housed under the rear seat. There are many practical examples of retractable movable bleachers that can be stored one after another and retracted into a shelf-like shape, and the present invention relates to the chairs that are installed in these movable bleachers. This is particularly true of the improvements made to the seat, which can be raised freely.

In addition to fixed bench-type chairs, the chairs installed in the movable bleachers include connected chairs that support the seats in a freely rotatable manner and that can be lifted up when not in use, allowing the upper surface of the deck to be widely used as a passageway. The former bench type is known to have a low height so that it does not become a problem when stored, but the latter is a theater chair type. Because the raised seat and backrest protrude high, the entire chair is generally folded forward or backwards so that it lies flat on the top of the deck, so that when a single bleacher seat is stored like a shelf, it does not collide with the single seat behind it. ing.

This folding of the chairs by overturning is extremely important in reducing the storage space, and furthermore, in order to keep the height of the seats low, it is necessary to fold them flat and thin.

Conventionally, in response to such requests, for example,
A device has been proposed as in Publication No. 121247.

The device related to this proposal is that when the seat is lifted up, the upper surface is brought together so that it is in contact with the front of the backrest, and in this state, the entire chair can be tilted forward and the chair can be laid down on the deck. When the seats are in a reclining position, they are flat, so when the seats are retracted, they can be easily placed under the deck of the seats at the rear.

However, in the case of this bleacher chair, when the seat is lifted up, the top of the seat always rotates until it comes into contact with the front of the backrest, causing a problem that becomes troublesome when the seat is tipped over during use. It was hot.

In particular, in the case of a chair that has a built-in spring so that it automatically flips up as soon as the seated person leaves, the seat is always biased in the direction of flipping up, so if you want to open it horizontally, you have to insert your hand between the seat and the backrest. It is difficult and inconvenient for the seated person to do this while facing forward.

[Problems to be solved by the invention] In view of the above-mentioned points, the present invention avoids the upper surface of the seat from coming into contact with the front surface of the backrest that stands up when the seat is lifted up when not in use. This makes it easy to push down the seat when sitting, but when the movable bleachers are collapsed onto the top of the deck while being retracted and stored, the raised seats come into contact with the front of the backrest and fold into a flat shape. The aim is to provide chairs for the retractable bleachers that can be folded up.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention includes a stopper on a seat that is rotatably supported around a rotating shaft, and a spring member on a frame that supports this seat. When the seat is lifted up, the stopper is brought into contact with the spring member and stopped just before it comes into contact with the front surface of the backrest that stands up behind it, and the stopper is brought into contact with the front surface of the backrest that stands up behind it. On the other hand, when the chair is tilted forward using the support shaft that supports the frame as a fulcrum and placed on the top surface of the deck, its own weight is used to suppress the repulsion of the spring member and the seat is brought into contact with the front of the backrest, making it flat. The reason is that it is foldable.

The stopper provided on the seat is provided on the rear side of the rotating body shaft that supports the seat, and can be used as a means for holding the seat in a position in which it can be seated by coming into contact with the frame when the seat is turned over horizontally. When the seat is flipped up, it is preferable to have it collide with a spring member to restrict rotation beyond a certain rotation range.

On the other hand, the spring member is suitably a metal spring or a rubber product with elastic force, but as an example, a coiled spring is wound around the rotating shaft, one end is brought into contact with the frame, and the other end is attached to the stopper. It is preferable to have the stopper facing the rotation trajectory and collide with the stopper that rotates as it is lifted up.

[Function] As is clear from the above description, when the seat of the movable spectator seat of the present invention is lifted up, as the seat reaches a certain raised position, the stopper provided on the seat engages the spring member provided in the frame. Since the seat abuts against the seat and prevents it from flipping up and turning, it does not come into contact with the backrest that stands up behind the seat. This means that you can easily pull it down with your hands.

The chair of the present invention can be moved with the seat lifted up using the support shaft that supports the frame as a fulcrum.When the chair is tipped onto the deck of the bleachers, the upper part of the chair, that is, the raised seat Since the entire weight acts on the front edge of the backrest, the spring member that receives the stopper is compressed, and the front surface of the backrest comes into contact with the top surface of the seat, causing it to fold flat.

Furthermore, when the seat and backrest, which have been folded flat due to their own weight, are released from their own weight when the chair is stood up again using the pivot as a fulcrum, the restoring force of the spring member causes the seat, which is in a flying position, to lift up. It will move away from the front of the backrest and automatically create a gap here.

Hereinafter, embodiments illustrating the present invention will be described in more detail to clarify its features.

[Example] Figure 1 is a partially cutaway side view of the chairs standing on the deck of the bleachers and the seats lifted up and out of use, and Figure 2 is a partially cutaway side view of the chairs lying on the deck and stored. FIG.

In the drawing, 1 is the deck for the stand alone, 2 is the frame of the actuator provided on the rear upper surface of the deck, 3 is the spindle that passes through this frame laterally, and 4 is the stand that is pivoted on the spindle 3. It is a raised leg, 5 is a connecting rod that is passed in parallel to the support shaft 3 via legs 4 provided at appropriate intervals along the length direction of the support shaft 3, and 6 is a unit for this connection rod. It is a box-shaped frame with walls on the periphery that is fixed to the left and right pairs of chairs at intervals.

The frames 6 are arranged to face each other on the left and right sides, and a rotary shaft 7 is passed between them to support a seat 8 in a freely rotatable manner.
A pivot piece 9 is provided protruding from the rear portion of the backrest 10 to connect the lower end of the backrest 10 freely.

The backrest 10 is supported in an upright state by connecting a pivoting link 12 extending from the upper end of a support post 11 raised from the frame 6 in the middle of its height. are pivotally connected at both ends via pins 13 and 14, respectively.

Reference numeral 15 designates an elbow rotatably pivoted on a pin 13 implanted to pivotally connect the rotary link 12 to the upper end of the support column 11.

This elbow is provided with a cut from the bottom extending from the lower surface to the rear surface to form a groove-shaped cavity 16 having a vertical bottom surface portion 16a and a horizontal bottom surface portion 16b toward the rear and having a substantially right triangular cross section. The upper end of the support column 11 and one end of the rotation link 12 that stand up in this space are received.

On the other hand, in the figure, 17 is a stopper, and 18 is a coiled spring-shaped spring member wound around the rotating shaft 7 to receive the stopper.

The stopper 17 protrudes from both rear sides of the seat 8 and faces into the frame 6, and rotates within the frame 6 when the seat 8 rotates about the rotating shaft 7.

The spring member 18 has one end in contact with the inner wall of the frame 6, the other end facing into the rotation locus of the stopper 17, and the end thereof engaged with a shaft part 19 implanted in the frame, so that there is a gap between the two. It has been reduced to .

The chair of the present invention is constructed as described above.
When in use, the seats are extended into a staircase shape and the deck 1 of each seat is pulled out, and then the actuator is driven to rotate the support shaft 3 to move the chairs as shown by the solid line in Figure 1. It will make you stand up.

The chair shown here is in an unused state with the seat 8 raised, but to use it from this state, when the front edge of the seat is pushed down, the stopper 17 rotates about the rotation axis 7 and moves to the frame 6. It becomes horizontal when it touches the wall, and at the same time, the backrest 10 is pushed up via the pivot piece 9, and at the same time, the upper end of the backrest is pushed backward by the rotation of the rotation link 12, and the backrest is tilted backward. The vehicle is then converted into a state in which it is ready to sit (as shown by the one-dot chain line in Figure 1).

When the rotation link 12 rotates, the support 11 comes into contact with the bottom surface 16a of the hollow part 16 of the elbow 15, and the rotation link 12 comes into contact with the other bottom surface 16b, so that it is supported by the pin 13. The bent elbows will be held horizontal and restrained.

In this state of use, when seat 8 is next lifted up,
The backrest 10 is lowered while rotating the rotation link 12, returns to a vertical posture, and comes to face the raised seat.

When the seat 8 jumps up to a certain position with a distance from the backrest 10, the stopper 17 abuts against the spring member 18, and rotation is stopped here, maintaining the above distance (as shown by the solid line in Figure 1). ). And this seat 8
When the arm is lifted up, the rotation link 12 is directed downward and away from the bottom surface 16b of the hollow part 16 of the elbow 15, so that the elbow 15 can be freely rotated, and the front end can be raised upward.

In this manner, when the seat 8 is raised and folded, the chair of the present invention can ensure a distance from the backrest 10 by abutting the stopper against the spring member 18, and can also reduce the impact of the lifting. On the other hand, when the seats are collapsed onto a deck during deflation and storage, the seats and backrests can be overlapped to create a flat state.

Figure 2 shows the state in which the chair is tipped onto the deck for storage.When the seat 8 is lifted up and then tipped over using the support shaft 3 as a fulcrum, the tip of the elbow 15 first hits the top surface of the deck. It is rotated and aligned with the backrest 10,
Next, the leading edge of the seat 8 will come into contact with the deck.

When the leading edge of the seat 8 collides with the deck, it rotates around the rotating shaft 7 due to the weight or pressing force of the chair, and the stopper 17 presses one end of the spring member 18 stopped by the shaft portion 19, causing the backrest 10 to close. It approaches and overlaps tangentially, and is folded flat on the deck.

When the chair folded in this manner is raised again using the support shaft 3 as a fulcrum, the seat 8 opens due to the repulsion of the compressed spring member, and the distance between the chair and the backrest 10 is secured again.

Incidentally, in the above embodiment, a coiled spring was used as the spring member, but as is clear from the above description, any material having elasticity and repulsive force may be used instead of the coiled spring, for example, a member made of rubber may be used.

[Effects of the invention] The embodiments illustrating the invention have been described above, and when the seat of the chair of the invention is lifted up, the stopper abuts against the spring member to suppress the lifting and prevent the seat from colliding with the backrest. By ensuring the required distance between the seats, it is easy to reach when pushing down the seat to take a seat, which improves operability.Also, even if the seats are pushed up strongly, they are absorbed by the spring members, making no noise. It is convenient because there is no need to worry.

When the chair of the present invention is collapsed onto the deck when the bleachers are contracted and retracted, the open seat can be folded up against the spring member so that it is in contact with the front of the backrest, making it flat. This has the advantage that it can be easily accommodated in a narrow storage space, and therefore, the height difference between individual seats can be reduced, which is advantageous when organizing large movable seats that connect a large number of individual seats.

In addition, when the chair of this invention is stood up from the top of the deck, the seat automatically opens due to the repulsion of the spring member and creates a space between it and the backrest, so there is no need for special operations and the advantage is that sitting down can be done easily. be.

In addition, in this invention, as the seat is lifted up, the rotating link rotates so as to nestle against the support, releasing the restraint on the elbows and allowing the seat to rest against the backrest. But it's convenient.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of the chair with the chair upright on the deck of the bleachers and the seat lifted up so it is not in use, and Figure 2 is a partially cutaway side view of the chair with the chair lying on the deck in preparation for storage. It is a side view that can be cut out. 1... Decks for stand alone seats, 3... Support shafts, 6...
...Frame, 7...Rotation axis, 8...Seat, 10...
Backrest, 11... Support, 12... Rotating link, 15
...Elbow, 17...Stopper, 18...Spring member.

Claims (1)

[Scope of utility model registration request] A frame is rotatably supported from a standing position to a forward-folded position using a support shaft installed horizontally on the deck as a fulcrum, and a seat is pivotably supported on a rotating shaft installed horizontally on the frame. A backrest that is supported in an upright manner by connecting the lower end to the rear part with a pivot, and by connecting a rotating link extending rearward from the upper part of the column that stands up from the frame with a pivot in the middle of the height. The seat has a telescoping mechanism, in which when the seat is in a horizontal position, the backrest is pushed up and the upper end is tilted backwards, and when the seat is flipped up and rotated, the backrest is lowered and converted to a vertical position. In the chair of the spectator seat, the seat is provided with a stopper, and the other frame is provided with a spring member that abuts the stopper, and when the seat is raised, the stopper abuts the spring member and the seat is seated in front of the backrest. At the same time, when the frame is tilted forward using the support shaft as a fulcrum, the front part of the seat is pressed against the upper surface of the deck, compressing the spring member and bringing the seat into contact with the front surface of the backrest. A retractable movable bleacher chair that can be moved.