JPH0456611B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a deck (floor stand) that expands and contracts and expands in a step-like manner when in use, and connects in large numbers when not in use.
This invention relates to foldable chairs installed on each deck of movable bleachers that can be contracted and stored in the form of shelves.

[Prior art] Telescoping movable bleachers are made by connecting multiple bleachers at different heights on a deck equipped with wheels, and when not in use, a short bleacher seat can be moved to a taller one. Since the chairs will be stored under the deck and will ultimately be stored in the form of a shelf, the chairs installed on the deck must be of a type that does not interfere with the contraction and storage of each unit.

For this reason, the chairs installed in this type of movable bleachers are generally foldable and can be tipped over so that they can be accommodated in the narrow space between the decks in the retracted state.

The chair device published in Japanese Utility Model Application Publication No. 58-121247 is an example of a conventionally known movable bleacher chair with a folding structure. After folding, the column is driven forward by a motor and flattened against the top of the deck, making it possible to retract and store the seats.

[Problems to be Solved by the Invention] As mentioned above, chairs for movable bleachers that are foldable have been known in the past, but the chairs proposed in the past have a main body part, that is, a seat, an arm rest, For the backrest part, each chair is folded by hand, with the backrest being formed in advance parallel to the pillar, and the seat and armrests being folded manually.
After that, all the chairs installed on the deck were knocked down in preparation for storage.

Therefore, it takes a lot of effort to store a movable bleacher with a large number of chairs, and if it is not folded properly, it will not be able to fall flat and it will not be possible to store it. This could cause damage and sometimes even cause malfunctions.

In view of such conventional problems, the present invention has been developed by folding an armrest provided horizontally at the upper end of the support in parallel with the support while driving the support of the chair forward and folding it onto the deck by driving a motor. In addition, the backrest, which stands in a backward-leaning position behind the pillar, can be aligned along the back of the pillar and automatically folded onto the deck while being flattened around the pillar, and when in use. To provide a chair for a movable spectator seat which can be prepared for seating by returning an armrest and a backrest to their original state in conjunction with the raising and movement of a support.

[Means for Solving the Problems] That is, in order to solve the above-mentioned problems, the present invention provides a base frame at the rear of the deck of a single movable spectator seat, and connects the lower end of the support to a pivot shaft installed horizontally on the base frame. The arm rest and backrest can be folded in conjunction with this rotation by pivoting the support and rotating the support by the operation of a link that transmits the rotation of the drive motor. To explain, there are left and right columns that have their lower ends supported on a pivot shaft provided in the base frame so as to be rotatable from an upright position to a forward-folded position, and that support the seat in the middle of the height, and each column. The armrest is rotatably supported on the upper end with a support shaft as a fulcrum, and the middle of the height of the side edge is rotatably connected to the rear of the armrest, and the lower end is attached to the support via a connecting link. A backrest that is connected in the middle of its height and supported in an upright manner behind the support, an interlocking link whose upper end is pivoted to the middle of the length of the link and hangs down, and a support whose lower end is connected to the support. A movable bleacher seat comprising a guide means for guiding up and down along the vertical direction, and an interlocking member connected to the lower end of the interlocking link and having the other end supported on a support shaft provided in the base frame, Sometimes, by pushing up the interlocking rod, the connecting link is raised from the pivot end with the column as a base point, and at the same time the backrest is pushed up, the arm rest is held in a horizontal position to enable seating, and the above-mentioned When the support is tilted forward, the pivot shaft is used as a fulcrum, and as the forward tilt progresses, the interlocking link is pulled down along the guide means by pulling the interlocking rod, and the backrest is pulled down along the back of the support by rotating the connection link. To provide a telescopic movable bleacher seat whose armrests can be rotated and folded parallel to the pillars at the same time as they are aligned.

[Function] When the movable bleacher chair according to the present invention is used, the support is erected above the pivot shaft, and in one method, this position is fixed to the drive rotation shaft that decelerates and transmits the rotation of the drive motor. It is held in place by a link member. When in this standing position, the interlocking rod, whose one end is pivoted to the support, pushes up the interlocking link, which rotates the link approximately 90 degrees and pushes up the lower end of the backrest, at the same time allowing the user to stand up. The rear end of the armrest is pushed up to return it to the horizontal position, and the rear end of the armrest is pushed backwards at the middle of the height of the backrest, converting it into a backward leaning position, allowing the user to sit.

This raising of the support is performed simultaneously for all chairs in a horizontal row supported via one pivot shaft,
In addition, the upper ends of the interlocking rods are actuated on the arm rests and backrests of all chairs through the means for communicating with them laterally to convert them into a posture in which they can sit.

Next, when retracting, that is, in a forward tilted position, by tilting the column forward about the pivot shaft, the upper end of the interlocking rod is moved downward along the guide means due to the difference in the pivot points of the interlocking rod with respect to the column. let In conjunction with this, the backrest and arm rest are attached to the pillar via interlocking links and connection links, and at the same time as the pillar falls, they are folded flat onto the top of the deck and converted into a state where they can be stored.

Examples illustrating the present invention will be described below.
Its features will be explained in detail.

[Example] Figure 1 is a partially sectional side view of the main parts when the seat is in an upright position, Figure 2 is a partially cutaway front view of the main parts, and Figure 3 is the same as Figure 1. FIG. 4 is a side view showing an enlarged portion of FIG. 3, and FIG. 4 is a front view showing an enlarged portion of FIG.

The reference numeral 1 in the drawing is a base frame provided on the rear upper surface of the deck 2 of the single bleacher seats to be installed, 3 is a pivot shaft passed between the opposing base frames, and 4a is a pivot shaft that rotates around this pivot shaft. This is the lower half of the column that is pivoted for free movement.

A plurality of base frames 1 are arranged along the rear edge of the deck at intervals along the rear edge of the deck, and the lower half of the column 4a is attached to the pivot shaft 3, and the lower half of the column stands up from each base frame. A connecting rod 5 for horizontally connecting a plurality of seats is provided between the upper ends of the seats 4a.

4b is the upper half of the column fixed to the connecting rod 5 at a required interval in an upright manner, and 6 is rotatably supported on a bracket 7 provided midway in the height of this upper half. The seat, 8 is the backrest, and 9 is the elbow rest.

In this embodiment, in order to provide integrity to a plurality of seats that are connected horizontally and to simplify the structure, the lower half 4a is reduced relative to the upper half 4b of the column by interposing the connecting rod 5 as described above. Although the number of base frames is also reduced, the combination of the lower half 4a and the upper half 4b essentially constitutes one support.

Now, the elbow rest 9 is rotatably attached to the upper end of the upper half of the column via a support shaft 10, and the backrest 8 connects the rear end of the connecting fitting 11 extending from the rear part of the elbow rest 9 to the side edge. It is supported by being pivoted 12 midway in the height of the column and by connecting the lower end of this side edge part through a connecting link 13 to a midway point in the height of the upper half of the support column 4b.

The connecting link 13 has a dogleg shape, and its both ends are attached to the backrest and the support with pivots 14 and 15 so that it can rotate, and an interlocking link 16 that restricts rotation is attached to the pivot in the middle of its bent length. They are rotatably connected via 16'.

Reference numeral 17 denotes a guide means provided vertically along the rear edge of the upper half portion 4b of the column, 18 denotes an interlocking rod that passes through the guide means provided on each column and extends in parallel to the connecting rod 5, and 19 is an interlocking member whose lower end is rotatably attached to the base frame 1 via a support shaft 20, and whose upper end is welded and connected to the interlocking rod 18.

The support shaft 20 of the interlocking member 19 is located above and somewhat behind the pivot shaft 3 that supports the column, and when the column falls forward using the pivot shaft 3 as a fulcrum, it falls and interlocks using the support shaft 20 as a fulcrum. The rod 18 can be moved to the lower end of the attraction guide means.

The interlocking link 16 has a lower end connected to the guiding means 1.
It is connected to an interlocking rod 18 which is slidably fitted to the interlocking rod 7, and is configured to move up and down along a guide means as the interlocking rod moves.

In the figure, 21 is a drive rotation shaft rotated by a motor, and 22 and 23 are links that transmit the rotation of this rotation shaft 21 to the lower half portion 4a of the column.

When the two links 22 and 23 extend linearly around the connection point 24, they push out the lower end of the lower half 4a of the support column to make it stand up, and when bent into a dogleg shape, the support supports the pivot shaft 3 as a fulcrum. This will cause it to rotate and fall forward.

In the above, when the rotating shaft 21 is rotated by the rotation of the motor, and the two links 22 and 23 extend linearly and the column supported by the pivot shaft 3 stands up, the interlocking rod 18 connected to the interlocking member 19 is pushed. It is raised to reach the upper end of the guide means 17, and as a result of this pushing up, the interlocking link 16 rises and the connecting link 13 is lifted up using the pivot point 15 as a fulcrum, thereby pushing up the backrest 8. As this is pushed up, the armrest 9 connected via the connecting fitting 11 rotates about the support shaft 10 and assumes a substantially horizontal posture, and the rear part protrudes due to this rotation to support the backrest 8. It will be pushed backwards and held in a backward tilted position (see Figures 1 and 3).

The seat 6 is rotatable about the support shaft 25 of the bracket 7, and is normally raised by the bias of a coiled spring 26. Incidentally, the rear surface of the lower half 4a of the support in the upright position abuts against the stopper 27 to prevent it from falling backward.

This operation of raising the support column is performed by driving the motor after the movable seats are extended and each seat is pulled out from under the rear seat. In this case, the chairs installed on each single deck will be operated individually. In actual use, the seat can be placed by tilting the jump-up seat 6 horizontally, and when the seated person leaves the seat, the seat will jump up due to the force of the spring.

Next, when retracting from this state, the motor is reversed before the seats are retracted.

That is, when the drive motor is reversed and the drive rotation shaft 21 in FIGS. 1 and 3 is rotated clockwise, the two links 22 and 23 are bent in a dogleg shape and pivoted to pull down the lower half of the column 4a. The user will fall forward using the mounting shaft 3 as a fulcrum.

As the support column falls, the interlocking member 19 also falls forward using the shaft 20 as a fulcrum, but since the support shaft 20 is located behind the pivot shaft 3, the upper end moves backward as the support falls down and slides into the guide means 17. Then, the interlocking rod 18 is pulled down, and the interlocking link 16 is pulled down.

As a result, the connecting link 13 rotates approximately 90 degrees about the pivot point 15 to lower the backrest 8, and at the same time rotates the arm rest 9 about the support shaft 10, moving both of them around the upper half of the support. It will be aligned parallel to section 4b.

The two-dot chain line in Figures 1 and 3 shows the overturned posture of the support column caused by the above-mentioned drive motor, and the arm rest and backrest are pulled parallel to this support column due to the fall of the support column as the seat is raised. It becomes flat and lies down on deck 2.

The operation of the backrest 8 and arm rest 9 as the pillars rise and fall is simultaneously performed for a plurality of seats connected horizontally by the vertical movement of the interlocking rod 18 that passes through the guide means 17 provided in the upper half of each pillar. You will be killed.

[Effects of the Invention] As clarified in the description of the above embodiments, the present invention allows the upper end of the interlocking member to be connected to the interlocking rod as the support rotates between the standing posture and the falling posture with the pivot shaft as the fulcrum. The structure is such that the vertical movement is transmitted to the backrest and the elbow rest through two links, and the elbow rest and the backrest are rotated respectively. By movably pivoting and connecting the support, when the support is standing up, the arm rest is kept horizontal and the backrest is kept in a slightly backward position, allowing the user to sit, and the support can be moved forward about the pivot axis By folding down, the arm rests and backrests can be aligned parallel to the pillars and folded flat, so when the movable seats are extended and put into use, all the chairs provided for each individual seat can be folded flat. While the seats can be erected as one unit and ready for use immediately, when the seats are to be stored, the seats can be folded flat on the top of the deck using the drive of a motor and then retracted for storage, which can be expected to speed up the work.

Furthermore, when the seats are retracted, the backrests and arm rests are securely aligned along the pillars, and their arbitrary movements are restricted, so there is no risk of colliding with the single deck at the rear when the seats are retracted. It has the advantage of being safe to handle.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention.
The figure is a partially sectional side view of the main part in the standing position in which the seat can be seated, Fig. 2 is a front view of the main part with some parts cut away, and Fig. 3 is an enlarged view of the part shown in Fig. 1. FIG. 4 is a front view showing an enlarged portion of FIG. 3. 1...Base frame, 3...Pivot shaft, 4a, 4b...Lower half and upper half forming the column, 6...Seat, 8...
Backrest, 9... Elbow rest, 10... Support shaft, 13... Connecting link, 16... Interlocking link, 17... Guide means, 18... Interlocking rod, 19... Interlocking member, 20...
...The supporting shaft.

Claims (1)

[Scope of Claims] 1. Left and right columns whose lower ends are supported by a pivot shaft 3 provided in the base frame 1 so as to be rotatable from an upright position to a forward-folded position, and which support a seat 6 midway in height. and,
An armrest 9 is rotatably supported at the upper end of each column about a support shaft 10, and the middle of the height of the side edge is rotatably connected to the rear of the armrest 9, and the lower end is connected. Link 1
3, the backrest 8 is connected to the middle of the height of the pillar and supported in an upright manner at the rear of the pillar, and the upper end is pivotally connected to the middle of the length of the connecting link 13 and hangs down. The link 16 and the guide means 17 for guiding the lower end of the interlocking link 16 up and down along the column.
and an interlocking member 19 connected to the lower end of the interlocking link 16 and having the other end supported on a support shaft 20 provided in the base frame 1.
When the support is in the upright position, the interlocking member 19 is pushed up to raise the connecting link 13 via the interlocking link 16 from the end of the pivot 15 with the support, pushing up the backrest 8, and at the same time pushing up the backrest 8. 9 can be held in a horizontal position to allow seating, and when the above-mentioned support column is in a forward tilted position, the interlocking member 19
The interlocking link 16 is pulled down along the guide means 17 by pulling the link 13, and the backrest 18 is rotated.
This telescopic movable bleacher seat can be folded by pulling it down along the back of the pillar and at the same time rotating the armrest 9 so that it is parallel to the pillar.