JPH0310788B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an automatic chair upright and overturn device for telescoping stepped bleachers.

[Conventional technology]

In recent years, in order to use the interior of gymnasiums for multiple purposes, it has become common for gymnasiums to install retractable and movable tiered seats on a portion of the floor near the wall. This viewing seat is formed by interconnecting a plurality of movable platforms with viewing chairs of increasing height so that it can be moved by expansion and contraction in the front and back direction.
When the spectator seats are used, they are pulled out one after another starting with the lowest movable platform at the front, and the entire structure is extended into a dais-like structure, so that a large number of spectators can sit on the chairs on each movable platform. Also, when not in use,
Contrary to the above, by moving backwards from the first movable bed to the rear movable bed, the entire structure is reduced to a vertical shelf under the highest movable bed. Therefore, it is configured so that it can be stored in a storage recess provided on the wall side of a building.

[Problem that the invention seeks to solve]

Conventional bleachers with the above configuration had the following problems.

(1) When pulling out and storing a movable bed, the chairs installed on each tier of the movable bed must be raised and folded uniformly, but conventional chairs of this type require workers to It was raised and lowered by manual operation. Therefore, it takes a lot of time and effort to raise and lower the chairs each time the bleachers are used, which increases the cost of using the bleachers, thereby reducing the economic efficiency of multi-purpose uses such as gymnasiums. did.

[Means for solving problems]

This invention solves the above-mentioned problems of the prior art, and includes legs that automatically stand up and fall in conjunction with the forward and backward movement of the movable bed platform in the base frame of the chair at each stage. To provide an automatic chair stand-up and fall device for retractable stair-shaped bleachers, which can reduce the cost of using the bleachers and greatly improve the economic efficiency of multi-purpose use in gymnasiums and the like. The feature of this invention is that a plurality of movable floor tables with chairs of different heights are connected to each other so as to increase in height, and a step-like structure is constructed so as to be movable so as to be able to expand and contract in the front and back direction. In the bleachers, legs are arranged in a base frame of a chair installed on the movable platform so that they can be raised and lowered, and a leg-erect mooring mechanism and a mooring release mechanism are connected to the legs, and the leg-erector mooring mechanism has one end The other end of the toggle link, which is pivoted to the leg, and one end of the toggle arm, whose center part is pivoted to the base frame, are pivoted at a position beyond the pivoting part when the leg is in an erect state, and the leg is moored and fixed. The mooring release mechanism includes a first link whose one end is pivotally connected to the leg, and a second link which is attached to the base frame so as to be movable in the front and back direction, and which are connected in a bendable manner. The arrangement is such that the arm is pressed and rotated to release the mooring of the leg-erecting mooring mechanism and promote the falling of the leg.

[Effect]

When extending the movable platform of each tier into a dais-like manner for the purpose of using the bleachers equipped with the automatic chair upright and fall device configured as described above, the movable platform of the first tier is When each stage of the movable bed is moved forward one after another from the platform, the chairs for each stage and the automatic stand-up and fall device, which had been stored under the movable bed on the rear stage, will also move forward at the same time. Become.
At that time, one end of the rear part of the device comes into contact with the front end of the rear movable platform that is stopped directly above it, so the legs of the device stop immediately on the upper side, but the lower end side is attached to the base frame. We will continue to move forward as one. Therefore, the legs automatically stand up gradually in proportion to the advance of the frame and with the assistance of the supporting bullets. At this time, the toggle link whose base end is pivotally supported by the leg that automatically stands up is pushed by the leg that stands up, and its tip rotates around the axis of this arm with the toggle arm following it. A toggle clamp (armrest mooring) condition is obtained when the inside of the elbow of the link comes into contact with the axis of the arm, so when the base frame stops integrally with the movable platform in question, the above-mentioned legs A perfect standing posture is obtained by having a support elasticity in the standing direction and a toggle mechanism between the toggle link and the arm that maintains a complete toggle clamp (armrest mooring) state with the assistance of this support elasticity, As a result, the chair integrated with the legs can be erected in a completely locked state without requiring any manpower when pulling out the movable bed. In addition, if the movable platform on each tier is reduced to a vertical shelf below the highest movable platform after the bleachers are used, the seats should be moved sequentially from the first movable platform using the unique driving force of the bleachers. When moved backwards to the highest stage, the toggle clamp (armrest mooring) that holds the toggle link and arm when the legs are raised.
As a result, the first and second links, which were in a straight line, are deformed from the straight line to a V-shape due to the movement of the supporting ammunition at the same time as the moving platform moves backward. When the toggle arm is pressed down by the connecting shaft of both links that are lowered, the toggle arm is rotated in the direction to release the toggle clamp (armrest mooring). Immediately after this, the upper part of the leg that has retreated integrally with the base frame comes into contact with the front end of the rear movable platform and is tilted forward, and as the leg's forward posture deepens,
The toggle link pivotally supported on this leg and the first link are finally lined up on the same line, and the elbow tip of the toggle link and the toggle arm become substantially straight in the direction in which the supporting bullet of the second link acts. Therefore, since the V-shape bending action of both the links is reliably prevented, the leg can be held in the toggle mechanism in a completely falling state, thereby allowing the leg to be integrated with the toggle mechanism. To automatically overturn a chair without requiring human intervention when storing a movable bed.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, to explain the configuration, as shown in part in Fig. 5, when in use, the entire bleacher seat A is moved onto the floor surface H in front, and a multi-tiered seat G is installed on each upper surface. By sequentially pulling out the movable platform E with the support D attached to it from the frontmost stage side together with the base B of each stage by the rolling of the roller C while the movable platform E with the support D is connected to each other, the whole is extended into a pedestal shape, In addition, when not in use, contrary to the above, the movable bed platform In the retractable staircase-like bleachers, which can be stored and stored in a storage section (not shown) behind them, the following automatic chair stand-up and fall device is installed on the upper surface of the above-mentioned movable platform E near the support D for each step. Chairs F are installed at intervals in the longitudinal direction in the same prescribed arrangement as each chair G.

The automatic chair stand-up and fall device F described above is constructed as follows. That is, as shown in almost its entirety in FIGS. 2 and 4, the automatic chair stand-up and fall device F consists of a base frame 1, legs 3, toggle links 6 and toggle arms 8 of the leg-up mooring mechanism, and a mooring release mechanism. First link 12 and second link 1
It is composed of the main parts of 3. First, the base frame 1 is made by bending a band-shaped metal plate with a predetermined width into an approximately C shape, and on both sides of the upper part there are two slide rails 1a, 1a of the same shape with a U-shaped longitudinal section, and at the rear part, on top of the base. Depending on the mounted state, they are provided horizontally and facing each other from the rear end to the front end to a midway position.

Next, the leg 3 is formed into a rectangular tube whose parts other than the upper end are substantially rectangular by molding a metal plate, and a guide roller 20 is shaft-fitted between the two rear pieces adjacent to the top of the leg by inserting a pin 19 therethrough. There is. The leg 3 according to this embodiment is fitted into the center of the support shaft 2 which is inserted horizontally into the lower front end of the base frame 1, with a hole at the lower end (not shown), so that it can be raised and tilted forward. There is. On the axis of the support shaft 2 located on both sides of the leg 3, there are push-up springs 4, 4 for raising the leg 3 by supporting bullets. It is elastically arranged so that it is suspended from a part of 3. At a height position approximately in the middle of this leg 3, there is a shaft 5 having a length that reaches both sides of the base frame 1.
is inserted parallel to the lower support shaft 2 mentioned above. Furthermore, the above-mentioned chair G is attached to the top of the head of this leg 3.
The lower ends of the two are connected so that they can be raised and folded together.

Next, on both sides of the leg 3 at the position where the shaft 5 is inserted as described above, a pair of first links 12 having pin holes at both ends of the band plate are loosely fitted into the shaft 5 at their base ends and swing. Possibly located. Further, on the axis of the shaft 5, which is further outward of the first link 12, there is a band-shaped plate that is in a straight state from the base end to the vicinity of the tip, and the tip of this straight state is oriented toward the base end side. A pair of toggle links 6 formed in the shape of a square are swingably disposed by being shaft-fitted at the base ends.

The tip of the toggle link 6 described above is connected to the support shaft 2.
A pin 9 is inserted into one end of a rhombus-shaped toggle arm 8 that is fitted in the middle zone of a shaft 7 that penetrates both sides of the base frame 1 in a transverse manner at the rear of the base frame 1. Connected by possible.
In this case, the tip pin 9 of the toggle link 6 reaches a position slightly beyond the linear toggle clamp line T connecting the proximal shaft 5 and the shaft 7 of the toggle arm 8, The toggle link 6 and toggle arm 8 allow the leg 3 to fully stand up.
It is configured so that it can be easily secured by a toggle clamp (armrest mooring) that has a handle.

As described above, the shaft 5 into which the base ends of the toggle link 6 and the first link 12 are fitted maintains the erected state at its normal position when the leg 3 is erected by the supporting force of the push-up spring 4. Therefore, it is supported by stopper bolts 21, 21 protruding from the rear on both sides.

Further, as a guide for raising and lowering the leg 3, there is a slider 10 shown below, the first link 12 described above, and a second link 13 formed by a supporting bullet connected to this link 12. That is, the slider 10 described above is arranged between the slide rails 1a, 1a provided on both sides of the upper part of the base frame 1, and is formed into an inverted L-shape in side view by bending a metal plate. . At the front and back positions on both sides, pins 16 with rollers 17 fitted on the ends,
16 are arranged in parallel, and these pins 16,
Hanging pieces 10a, 10a each having a pin hole are hung in parallel from the left and right bottoms of the upper surface near both sides of the space between the holes. A shaft 11 is inserted horizontally between the pin holes of both hanging pieces 10a, 10a.

Further, at each end of the shaft 11 inserted into the vertical pieces 10a, 10a, a pair of second links 13 having shaft holes provided at both ends of the strip plate are pivoted with shaft fittings at their base ends. Possibly located. The tip of the first link 12 and the tip of the second link 13 are connected to a series of toggle release shafts 14 for both shaft holes.
They are connected by penetration. In this case, a toggle release spring 15 is wound around the shaft 11 between the vertical pieces 10a, one end of which is locked to the second link 13, and the other end is connected to a straight pin 16.
By elastically engaging the first link 12
As long as no external force is applied, the second link 13 will be in a downward position due to the toggle release shaft 14 when it is deformed into a V-shape by the supporting force of the toggle release spring 15, as shown in FIGS. 2 and 3. With a pressing force of
The toggle clamp (armrest mooring) mode is collapsed via the arm 8, thereby promoting the overturning of the leg 3 in the standing mode. Note that this first link 12 and second link 1
3 is located between this leg 3 and the slider 10 when guiding the leg 3 in a fallen state to stand up.
Since the tension generated by the slider 10 and the toggle release spring 15 is greater than the supporting force of the toggle release spring 15, the leg 3 is configured to maintain the straight line shape and help the leg 3 stand up without being deformed into a V-shape.

Incidentally, adjusting screws 18, 18 are screwed into both ends of the slider 10, which correspond to the upper surface thereof, in parallel to the front-rear direction of the base frame 1. The slider 10 with the adjustment screw 18 is connected to the leg 3 via the first link 12 and the second link 13, so that each movable platform E can be pulled forward for the purpose of using the bleachers A, for example. In this case, the adjustment screw 18 of the slider 10 comes into contact with the front nose K of the rear moving platform E located at the upper part, thereby acting as a guide to erect the legs 3 which are in the forward-folded state. The automatic chair stand-up and fall device F is constructed as a whole.

The automatic chair stand-up and fall device F with the above configuration is as follows:
As shown in FIGS. 1, 4, and 5, the chairs are placed on the movable bed E adjacent to the support D of each stage at the same distance as the chairs G in the longitudinal direction. It is attached so that it can move integrally with the movable platform E using bolts screwed into bolt holes (not shown) provided in each base frame 1. The lower end of the chair G is placed on the top of the legs 3, and is attached to the chair G by bolts so that it can be moved as a unit and can stand up and fall down.

In addition, the automatic chair upright and fall device F is configured such that when the movable floor platform E is reduced to a vertical shelf shape, the current movable floor platform E
It is arranged so that it can be stored under a movable bed E on the rear stage side by retreating integrally with the rear stage and gradually falling over from an upright position. When all the movable floor tables E are reduced to a vertical shelf shape, the entire chair G including the automatic chair stand-up and fall device F is stored in the air space between each movable floor table E in a completely overturned state. It is assembled into.

In order to use the bleachers A equipped with the automatic chair upright and fall device F configured as described above, when extending the movable platform E of each stage into a dais-like shape, first the drive (not shown) installed in the bleachers A is used. When the device is operated and the movable platform E of each stage is sequentially moved forward starting from the movable platform E of the first stage, until then the movable platform E of the rear stage is moved forward.
An automatic stand-up and fall device F is housed below with the legs 3 folded forward integrally with the toggle link 6.
will move forward at the same time. (Refer to the imaginary line in Fig. 3) The slider 10 in the automatic chair stand-up and fall device F that has moved forward integrally with the movable bed platform E in this stage as described above.
At this point, the legs 3 are stopped at the front end of the slide rail 1a due to the falling condition, but as the movable platform E moves forward, they move forward as a unit, and the slider 1
Since the adjustment screw 18 of No. 0 comes into contact with the front nose K which is the front end of the rear-side movable platform E which is stopped at the position directly above, the slider 10
maintains a stopped state while sliding within the rail 1a. Immediately after this, the legs 3 of the device F are stopped from moving upwardly through the first link 12 and the second link 13.
However, the lower end side that is pivotally fitted to the support shaft 2 continues to move forward integrally with the base frame 1, and as a result, the legs 3 move more slowly and more slowly than the base frame 1 moves forward. With the support of the supporting bullets provided by the push-up spring 4, the robot automatically assumes a standing position.

At this time, the toggle link 6 whose base end is pivotally supported on the leg 3 that automatically stands up is connected to the leg 3 that gradually stands up.
After being pushed by and rotating around the axis of this arm 8 with its tip following the toggle arm 8,
The inside of the elbow portion of the link 6 comes into contact with the shaft 7 of the arm 8. That is, the tip pin 9 of the toggle link 6 exceeds the toggle clamp line T by a slight amount l. Therefore, at this point, the above-mentioned toggle link 6 and arm 8 are in a toggle clamp (armrest mooring) state, so when the base frame 1 stops integrally with the stop of the current stage movable platform E, The leg 3 has a supporting force provided by a push-up spring 4 in the standing direction, and a toggle mechanism of the toggle link 6 and arm 8 that maintains a complete toggle clamp (armrest mooring) state with the assistance of this supporting force. As a result, the chair G, which is integrated with the legs 3, can be completely moored (toggle clamp = armrest mooring) without requiring any human intervention when pulling out the movable bed E. It can be made to stand up.

In addition, when the movable platform E of each tier is reduced to a vertical shelf shape under the movable platform E of the highest tier after the use of the grandstand seat A, the driving force unique to the grandstand seat A is used again to move the movable platform E of the first tier. When the floor platform E is sequentially moved backward toward the highest level, the first link, which had been in a straight line due to the toggle clamp (armrest mooring) that connects the toggle link 6 and arm 8 when the leg 3 is raised, becomes 12
A downward supporting force is applied to the second link 13 by the toggle release spring 15 at the same time as the current movable bed E retreats. Therefore, the above-mentioned both links 12 and 13 are deformed from the previous straight line form to a V-shape form, and due to this deformation, the toggle release shaft 14 between the two descends, causing the toggle arm 8 located directly below the link to deform. The arm 8 is rotated counterclockwise about the shaft 7 due to the downward force. In other words, this toggle arm 8 is the toggle clamp (armrest mooring) that was held until then.
It will rotate in the direction to release it. Immediately after this, the upper part of the leg 3, which has retreated integrally with the base frame 1, comes into contact with the front nose K of the rear movable platform E and is tilted forward. Moreover, the above leg 3
further deepens its forward posture, so that the toggle link 6 and the first link 12, which are pivotally supported on the leg 3, are finally lined up on the same line, and in this posture, the toggle release spring 15 is moved against the second link 13. The elbow end of the toggle link 6 and the toggle arm 8 stand in a substantially straight line in the direction in which the supporting force acts.
Therefore, since the bending operation into the V shape by both the links 12 and 13 is reliably prevented, the leg 3 can be completely tipped over while being held by the toggle mechanism, thereby allowing the leg 3 to completely fall over. 3 and a chair G integrated with the movable floor table E can be automatically overturned without requiring any human intervention when storing the movable floor table E. The automatic chair stand-up and fall device F, which has the legs 3 completely overturned as one unit with the chair G, will be stored again in the airspace between the movable bed tables E at each stage until it is reused. .

〔Effect of the invention〕

The present invention provides a staircase-shaped spectator seat in which a plurality of movable floor stands with chairs of different heights are connected to each other so as to increase in height, and are movable so as to be able to expand and contract in the front and back direction. Legs are arranged in a base frame of a chair installed on a movable bed so that they can be raised and lowered freely, and a leg-erase mooring mechanism and a mooring release mechanism are connected to the legs, and one end of the leg-erector mooring mechanism is pivotally connected to the leg. The other end of the toggle link and one end of the toggle arm whose central part is pivoted to the base frame are pivoted at a position beyond the pivoting part when the leg is in an erect state, thereby mooring and fixing the leg, and creating an unmooring mechanism. A first link, whose one end is pivoted to the leg, and a second link, which is attached to the base frame so as to be movable in the front and back direction, are connected in a bendable manner, and the toggle arm is pressed and rotated at the bending pivot joint. The present invention is characterized in that it is arranged so as to release the mooring of the leg-erecting mooring mechanism and promote the fall of the leg. Therefore, it is possible to automatically stand up and overturn the chair, which is integrally assembled with the legs of each step, in conjunction with the forward and backward movement of the movable platform, which makes this type of device This has the effect of reducing the cost of using the spectator seats, and greatly increasing economic efficiency through multi-purpose use of gymnasiums and the like.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a state in which the legs of the automatic chair stand-up and fall device according to the present invention are in an upright state, FIG. The solid lines in Figure 3 indicate that the legs are falling over, and the imaginary lines indicate that the legs are completely overturned. Figure 4 is a plan view of Figure 1, and Figure 5 shows one of the bleachers equipped with the above device according to the present invention. FIG. 1... Base frame, 3... Leg, 4... Push-up spring, 6... Toggle link, 8... Toggle arm, 12... First link, 13... Second link,
14... Toggle release axis, A... Spectator seat, E... Moving floor table, F... Automatic chair stand-up and fall device, G... Chair.

Claims (1)

[Claims] 1. In a staircase-shaped spectator seat configured to be movable so as to be able to expand and contract in the front and back direction, the movable floor base is configured such that a plurality of movable floor bases with chairs of different heights are connected to each other so as to increase in height in order, and are movable so as to be able to expand and contract in the front and rear directions. The legs are placed in the base frame of the chair installed above, allowing them to be raised and lowered freely.
A leg standing mooring mechanism and a mooring release mechanism are connected to the leg,
The leg standing mooring mechanism connects the other end of the toggle link whose one end is pivotally attached to the leg, and one end of the toggle arm whose central part is pivoted to the base frame at a position beyond the pivoting part when the leg is in the erect state. The legs are moored and fixed by pivoting, and the mooring release mechanism includes a first link whose one end is pivoted to the leg, and a second link which is attached to the base frame so as to be movable in the front and back direction, and which is bendably connected. , an automatic retractable staircase-shaped bleacher chair, characterized in that the toggle arm is pressed and rotated at the bending pivot part to release the mooring of the leg-erecting mooring mechanism and promote the falling of the legs; Stand-up and fall device.