JPH0450827Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] The present invention is a retractable movable seating area in which a plurality of individual seating areas with decks of different heights are connected back and forth to be extendable and retractable. This relates to the armrests of the equipped chairs.

[Conventional technology] When in use, the front and rear seats are connected to each other and are stretched out in a step-like manner, and when not in use, the front seats are retracted one after another so that they are stored under the deck of the rear seat. Telescoping movable bleachers that can be retracted have already been put into practical use as bleachers in gymnasiums, etc., and the present invention relates to the armrests of chairs installed in these bleachers.

As mentioned above, when the retractable movable bleachers are not in use, they are retracted and retracted one after another by placing the front bleacher seat under the rear bleacher seat, but at this time, the chairs on the deck obstruct the storage. To prevent this from happening, I usually place it on top of a deck so that it can sneak under the single unit behind it. At this time, the seat of the chair is raised to minimize storage space, and the horizontally supported armrests are raised to align with the backrest, allowing the entire chair to be folded flat.

The flip-up structure of the seat is generally supported by a rotating shaft, similar to that widely used in theater chairs, and the structure is such that the seat can be flipped up using this as a fulcrum. The rear part is pivoted to the backrest, and when not in use, the pivoted part is used as a fulcrum to flip up and fold it so that it is aligned with the backrest.

For example, Utility Model Application Publication No. 58-121247
This is what is described in Publication No. 58-156957.

The armrests, which are pivoted to the backrest, are not fixed in the horizontally protruding state when in use, and can be left hanging as they can be raised freely, and may cause the chair to tip over. When storing the chairs, the armrests must be lifted up individually to allow the chairs to fall onto the deck, so for example, a system in which a large number of chairs connected to each other on the deck can be tumbled all at once around a support shaft using power has been developed. Even if it was adopted, there was a problem that safe remote control could not be performed.

[Problems to be solved by the invention] In view of the above-mentioned problems, the present invention fixes the rotation of the armrest provided at the upper end of the support at the same time as the support is raised when the chair is used in an upright position. It holds the chair in the correct position and prevents it from rotating arbitrarily, and when the chair falls over during storage, it automatically releases the fixation and allows free rotation, allowing the chair to move along the backrest as the column falls. To provide an armrest for a chair in an extendable movable bleacher seat which can be aligned in the length direction.

[Means for solving the problem] The present invention was devised for the above purpose,
An armrest is rotatably supported on the upper end of a column that is supported to freely swing back and forth in the front and back directions about a support shaft provided on the deck of a single movable bleacher seat, and the above-mentioned column is vertically supported. When the user stands up, the lock piece, which is freely swingable in the cavity inside the armrest, is latched onto the engaging part provided on the pillar, and at the same time, the abutment part provided on the armrest is brought into contact with the front edge of the erected pillar. While restraining rotation around the axis and maintaining it in a horizontal position,
When the support column falls over, the lock piece is swung by its own weight to automatically release the engagement with the engaging portion of the support support, and the front end of the armrest comes into contact with the top surface of the deck due to the fall of the support support. It is an object of the present invention to provide an armrest for a chair which can be rotated about the axis as a fulcrum when touching the armrest, and whose length direction can be aligned with the backrest.

More specifically, the armrest has a hollow interior, and the upper end of the support is received through a downward opening and pivoted freely through a shaft extending into the hollow. is provided with an abutment part that abuts against the front edge of the support column, and a lock piece with a locking part at the lower end that swings under its own weight around a pin as a fulcrum is hung in the hollow part, and the other The front edge of the support column facing the lock piece is provided with an engagement part, and the engagement part of the lock piece that hangs down when the support support is in an upright position is latched to the engagement part, and at the same time the abutment part is engaged. The armrest is held in a horizontal position by coming into contact with the front edge of the column, restraining the rotation of the armrest, and when the column falls, the locking piece is swung around the pin as a fulcrum, disengaging the locking portion, and locking the armrest. The purpose of the present invention is to provide armrests for chairs of retractable movable bleachers that can be rotated freely.

Hereinafter, embodiments illustrating the present invention will be described in detail.

[Example] Figure 1 is a cross-sectional side view of the main part of the chair with the chair erected on the deck of the bleachers and the seat flipped up to make it unused. This is a cross-sectional side view of the main parts prepared for storage. In the figure, 1 is the deck of the stand alone that makes up the retractable movable bleachers, 2 is the frame of the actuator provided on the upper surface of the rear part of the deck, and 3 is a support shaft that passes through the inside of the frame horizontally and is rotated by an actuator, 4 is a chair leg pivoted on this support shaft, and 5 is a support shaft at an appropriate interval along the length of the support shaft 3. The above-mentioned legs 4 are erected with the
A connecting rod 5 is passed between the two, and numeral 6 designates the left and right frames of the chair in the form of a case, which are fixed to the connecting rod 5 in pairs at a distance of the unit chair.

A rotary shaft 7 is passed between the left and right frames 6 to rotatably support a seat 8, and a pivot piece 9 provided at the rear of the seat is rotatably connected to the lower end of a backrest 10.

The backrest 10 is supported in an upright position by connecting a pivot link 12 extending from the upper end of a column 11 vertically upright from the frame 6, and connecting it mid-height.
The rotary links 12 are rotatably mounted via shafts 13 and 14, respectively.

In the figure, reference numeral 15 denotes an armrest rotatably attached to the upper end of the support column 11 via a shaft 13.

This armrest 15 has a cross-sectional shape of an inverted triangle with a low height, and the inside thereof is hollow and opens downward to provide a cavity 16, in which the upper end of the support column 11 is attached. It is fixed by a shaft 13 that passes across the receiving side. Inside this cavity, a lock piece 18 is suspended close to the upper end of the support column 11 and swings by its own weight using a pin 17 as a fulcrum.
A locking portion 18a provided at the lower swing end of the support is attached to the support 11.
It faces an engaging portion 19 protruding from the front edge of.

The opening of the cavity 16 is open from the bottom to the rear, and the upper end of the column 11 and the rotation link 12 are accommodated therein, and the front edge thereof is connected to the column 11.
The abutting portion 20 abuts against the front edge of the armrest 15 to hold the upper surface of the armrest 15 horizontally.

In the figure, 21 is a stopper that restricts the range of rotation of the seat 8, and 22 is a spring member that receives the stopper and restricts the seat from jumping up.

When the seat is tilted horizontally, the stopper 21 contacts the wall 6a of the frame 6 to hold it in a horizontal position, and when the seat is raised to the fulcrum of the rotating shaft 7, it contacts the spring member 22 to restrict its rotation. The seat and backrest are prevented from coming into contact with each other.

The restriction of rotation by the spring member 22 is to ensure operability when the seat 8 is folded horizontally, while at the same time, when the chair is overturned, it can be folded flat to make contact with the backrest 10. In this embodiment, a coiled spring is wound around the rotating shaft 7, and one end of the coil spring is engaged with the wall portion 6a of the frame, and the other end is engaged with a shaft 23 installed in the frame. It is compressed between the levers, and the stopper 21 is abutted in the middle of the end. Here, when the stopper is pressed beyond the contact position, that is, when the seat 8 is forcibly rotated, the stopper compresses the spring member and allows the seat to pivot in the upward direction. .

The present invention is constructed as described above, and when in use, a plurality of connected single seats are pulled out from the front row, which is low in height, and extended and contracted above the stairs, exposing the deck 1 of each single seat. The motive is driven to rotate the support shaft 3, and the chair is raised to the position shown by the solid line in FIG. When sitting, the seat 8 is tilted forward and the stopper 21 is placed on the frame wall 6.
a to keep it horizontal and allow seating.

The one-dot chain line in FIG. 1 shows a state in which this seating is possible, and as the seat 8 rotates, the backrest 10 is pushed up, the rotation link 12 is rotated, and the upper end is tilted rearward. Then, the rotation link 12 is pushed up to push up the rear part of the armrest 15, and the abutment part 2 of the opening is pushed up.
0 will abut against the front edge of the support column 11 to convert this armrest into a horizontal position.

By the way, when the chair has fallen down on the deck and is ready for storage (the state shown by the solid line in Figure 2), the lock piece 18 is suspended from the pin 17 at the top, and as the chair stands up, the lower end of the chair is suspended. The locking portion 18a rests against the support column, and when the user stands up, the locking portion 18a engages with the engagement portion 19 of the support support to restrain the armrest 15 in a horizontal position.

In this way, when the chair stands up vertically and then the seat 8 is laid down horizontally for seating, the armrests 15 are pushed up by the rotation link 12, changing the posture horizontally, and at the same time the hanging locks are pushed up. The piece 18 is the engaging part 1
Since the armrest is latched to 9 and its rotation is restricted, the armrest is kept in a horizontal position. and,
This restraint continues even if the pivot link 12 rotates downward when the seat 8 is raised and the push-up of the rear end of the armrest is released, and as a result, even if the front end of the armrest is arbitrarily pushed up when the seat is raised. There is no need to disturb the alignment.

Next, when the chair is overturned for storage in the above state, the locking piece |8 will move away from the support due to its own weight according to this inclination, and the locking part 18a will be moved to the engaging part 19.
Since the armrest is removed from the armrest, it can be rotated freely. However, when the chair leans forward and the tip of the armrest touches the top of the deck, the armrest 15 rotates about the shaft 13 as a fulcrum, as shown by the solid line in Figure 2. In this way, it can be stored by aligning its length with the backrest and the side of the raised seat. Incidentally, the cavity 16 inside the armrest secures a space that allows the lock piece 18 to swing, and the lock piece 18 rotates about the pin 17 as a fulcrum according to the inclination of the support column 11.
It is advisable to load sufficient weight on the lower end of the swing so that it always maintains a vertical position. Of course, it is preferable that the upper edge of the engaging portion 19 of the support column that engages this lock piece be made into an inclined surface so that it does not become an obstacle to engagement when the armrest with its front end raised is laid down horizontally.

[Effect of the invention] As described in detail in the above embodiment, the present invention is such that when the chair is raised and the support is erected, when the armrest 15 is tilted horizontally, the vertically suspended lock piece 18 is rotated. It engages with the engaging portion 19 of the column, and the abutting portion 20 also contacts the front edge of the column 11 to restrict its rotation in any direction, so it is held in a horizontal position and can be arranged in any row. There will be no disturbance.

In addition, when the chair of the present invention is lowered from the raised seat when not in use, the armrest rotates horizontally due to the rotation of the rotation link, and the locking piece engages with the engaging part accordingly. , even if the armrests do not have to be oriented in the correct direction, they will be aligned when the seats are used, and from then on they will not rotate unless the chairs are overturned for storage, so there is no need to do any work to align them, which is extremely advantageous in terms of site maintenance. be.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional side view of the main parts of the chair with the chair erected on the deck of the audience seats and the seat raised, and Figure 2 is a cross-sectional view of the main part of the chair with the chair folded down onto the deck and ready for storage. FIG. 1...Deck, 3...Spindle, 11...Strut, 1
3... shaft, 15... armrest, 16... cavity, 1
7... Pin, 18... Lock piece, 18... Locking part, 19... Engaging part, 20... Abutting part.

Claims (1)

[Scope of utility model registration request] An armrest provided at the upper end of a column that is swingably supported from a standing position to a fallen position using a support shaft installed horizontally on the deck as a fulcrum, and the armrest has a hollow interior and a downward opening. The upper end of the column is rotatably pivoted via a shaft that receives the upper end of the column and passes it into the cavity, while the opening is provided with an abutting portion that abuts the front edge of the column, A lock piece having a locking part at the lower end that swings by its own weight around a pin as a fulcrum is vertically provided, and an engaging part is provided at the front edge of the support column opposite to the lock piece, The locking part of the locking piece that hangs down when the support is in an upright position is engaged with the engaging part, and at the same time, the abutment part is brought into contact with the front edge of the support to restrain rotation of the armrest and maintain it in a horizontal position. An armrest for a chair in a retractable movable bleacher seat, which is made to swing a locking piece about a pin as a fulcrum to disengage the locking part when the support column falls down, thereby allowing the armrest to freely rotate.