JP2002172034A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which has simple constitution and design and is constituted so that the chair can be swung to move from the used position to the erected position keeping the surface of the seat usually to the surface side. SOLUTION: This chair 1 is equipped with a seat 12 which is supported by a support 24 and is capable of rising motion swinging to move between a used position P almost horizontal against the floor face F and an erected position almost vertical, an arm 3 to rotatably support the seat 12 against the support 24, and a motion converting mechanism 4 equipped in between the arm 3 and the seat 12 and capable of converting rotating motion of the arm 3 against the support 24 to rising motion of the seat 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrist-operable chair used in a school or theater.

[0002]

2. Description of the Related Art Conventionally, as a chair of this type, a plurality of supports are provided at a required interval, and between the supports,
In some cases, when a seated person stands, the seat body is automatically erected to a standing position so as to be able to perform a rising operation. Specifically, this chair uses a spring that fixes both ends of a spindle penetrated through the seat to the support, and urges the seat to automatically rotate with respect to the spindle, It is of a flip-up type in which the seat is rotated from a use position substantially horizontal to the floor surface to a standing position that stands substantially vertically.

[0003]

However, in this apparatus, the seat rotates while drawing an arc around the support shaft, so that the chair and the chair or desk located in front of the chair are rotated. If the separation distance is not sufficiently ensured, the occupant may be caught on the tip of the seat while taking a seat and take a stiff feeling, or the seat may not be smoothly moved up and down. However, there are demands for the desks and chairs for lectures in schools and the like to increase the number of people in a limited space as much as possible, and to make the seat body deep enough to make the sitting comfort good. It is difficult to ensure a sufficient separation distance between the main body and a chair or desk located on the distal end side of the seat main body. In addition, in the upright position, the back of the seat is located on the front side,
The metal fittings attached to the back side are located on the front side, and the metal fittings may hit the back and feel uncomfortable when leaning on the seat.

In view of such a problem, recently, a structure has been proposed in which a seat is swing-moved from a use position to an upright position using a link mechanism or the like while always keeping the surface of the seat on the front side with respect to the chair body. Chairs have also been developed.

However, in the apparatus utilizing the above-described link mechanism, the seat is swung from a use position to an upright position using a pair of front and rear link members that support the front and rear ends of the seat. For this reason, a plurality of link members are required, so that the structure tends to be complicated, and the link members are exposed from the outside, so that the design does not look good.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a rotating support for rotatably supporting a seat with respect to the chair body. In between, an operation conversion mechanism capable of converting the rotational movement of the rotating support relative to the chair body into a rising operation of the seat is provided.

[0007]

More specifically, the present invention provides a seat supported on a chair body so as to be able to perform a rising operation while swinging between a use position substantially horizontal to a floor surface and a standing position substantially vertical to a floor surface. A rotating support for rotatably supporting a seat with respect to the chair body; and a rotating movement of the rotating support with respect to the chair body provided between the rotating support and the seat for raising the seat. The present invention relates to a chair provided with a motion conversion mechanism capable of converting motion into motion.

In such a configuration, for example,
The motion conversion mechanism is configured to be rotatable with respect to the rotary support integrally with the seat at a free end side of the rotary support and a rotational force transmitting unit provided at a rotation center end of the rotary support. And a rotating body provided between the rotating body and the rotating force transmitting unit and the rotating body are linked to each other so as to be movable with respect to the rotating body. And a transmission element for transmitting the rotation to the transmission element, and the rotation transmission unit and the rotating body are configured by gears and rollers such as sprockets and pulleys, and the like.
If the transmission element is composed of a chain or the like, a configuration can be realized in which the seat can be swung by one rotating support without using a complicated mechanism such as a slide mechanism or a link mechanism. Therefore, it is possible to realize a chair capable of swing operation with a simple mechanism and a simple design.

In order to simplify the structure and design of the chair as a whole, it is desirable that the rotating support has a hollow cover inside, and the motion conversion mechanism is provided in the cover. .

When used in combination with a desk or the like, the pitch of the left and right widths is changed in accordance with the change in the pitch of the left and right widths of the top plate of the desk or the like, as compared with the one that supports the left and right ends of the seat. In order to be flexible, the rotating support must be
It is desirable that the book supports a substantially central position in the width direction of the seat.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the chair 1 is used in combination with a desk 2 for lectures at a school or the like.

Hereinafter, a specific configuration of each section will be described in detail.

A plurality of desks 2 are arranged in a row in the front-rear direction. The table 2 has a plurality of desks integrally provided along the width direction. 22 supporting the center position in the width direction of the top plate area
Is provided. The support 22 includes a base 23 provided on the floor F and a support 24 provided upright from the base 23.

The chair 1 is attached to the front surface of the support body 22 in the second and subsequent rows in the desk 2 and is used in combination with the desks 2 in each front row. The backrest 11 and the backrest 11 Has a seat 12 provided separately. The backrest 11 is provided near the upper end of the column 24 so as to be adjustable in angle. The seat 12 is, as shown in FIG.
, A swinging movement between a substantially horizontal use position P and a substantially vertical standing position Q is provided so as to be able to perform a rising operation.

In this embodiment, in the present embodiment, the seat 12 is rotatably supported via the arm 3 serving as a rotation support, and the arm 3 is provided between the arm 3 and the seat 12. Of the seat 12 with respect to the support 24
An operation conversion mechanism 4 capable of converting the operation into a rising operation is provided.

As shown in FIG. 3, the motion converting mechanism 4 includes a first sprocket 41 serving as a rotational force transmitting portion provided on a base end 3a which is a rotation center end of the arm 3;
A second sprocket 42 which is provided integrally with the seat 12 on the distal end 3b side, which is a free end, and is rotatable with respect to the arm 3, and the first and second sprockets 41, 42 The arm 3 is engaged with the arm 3 so as to be movable with respect to the arm, and the rotational motion of the arm 3 is transmitted to the second sprocket 42 via the first sprocket 41, and the rotation is transmitted. And a chain element 43 which is a transmission element for promoting.

The arm 3 comprises a cover 31 having a hollow inside, and the first and second sprockets 41 and 42 and the chain element 4 are provided inside the cover 31.
3 is built in. The base 3a is attached to a bracket B provided at the lower end of the support column 24 so as to be rotatable in the forward and reverse directions via a support shaft p. Are rotatably supported in forward and reverse directions.

The first sprocket 41 is mounted on the support 24
The second sprocket 42 is fixed to the lower surface of the seat 12 by a suitable means.

The arm 3 is provided with a spring (not shown) for urging the arm 3 to rotate, and a sliding roller mechanism (not shown) for applying a braking force to the seat 12 during the rising operation. And so on. Reference numeral S in the drawing denotes a stopper that holds the seat 12 and the arm 3 at the use position P.

Next, the operation of the chair 1 of this type when the seat 12 is raised will be described.

When the occupant stands and releases the load acting on the seat 12 by standing, the spring (not shown) urges the rotational movement of the arm 3, and the arm 3 is moved from the position shown by the solid line in FIG. 3 in the direction shown by the arrow in FIG. When the arm 3 rotates in this manner, the chain element 43 wound around the first sprocket 41 moves in the direction of the arrow in the figure, and the movement of the chain element 43 causes the second sprocket 42 in the figure to move. The rotation in the direction of the arrow, that is, counterclockwise rotation is promoted, and the seat 1 is rotated.
2 performs a rising operation from the use position P to the standing position Q while swinging and moving as indicated by the imaginary line in FIG.

With such a configuration, one can use one mechanism without using complicated mechanisms such as a slide mechanism and a link mechanism.
It is possible to realize a configuration in which the seat 12 can be swung by the arm 3. Therefore, it is possible to realize the chair 1 capable of swing operation with a simple mechanism and a simple design.

If the arm 3 is provided with a cover body 31 having a hollow inside, and the operation conversion mechanism 4 is provided in the cover body 31, gears, chain elements, etc. are provided in the cover body 31. Since it is accommodated, the configuration and design of the entire chair 1 can be simplified.

Since the arm 3 supports a substantially central position in the width direction of the seat 12 with one arm, when used in combination with a desk or the like, compared with an arm that supports both left and right ends of the seat 12. Therefore, the pitch of the left and right widths can be flexibly changed according to the change of the pitch of the left and right widths of the top plate such as a desk.

Further, since the motion converting mechanism 4 is formed by using a sprocket, the seat 12 can be operated at a fixed ratio with a simple structure.

The configuration according to the present invention is, of course, not limited to those described above. For example, the rotational force transmitting unit and the rotating body are not limited to the sprockets described above, and a pulley may be used with similar gears. Further, it is needless to say that a roller or the like may be used. Further, for example, the configuration of the transmission mechanism is not limited to a chain, but may be a wire or the like. Other configurations can be variously modified without departing from the spirit of the present invention.

[0028]

The present invention is embodied in the above-described configuration and has the following effects.

That is, the present invention provides a rotary support for rotatably supporting a seat with respect to the chair main body, and a rotary support provided between the rotary support and the seat for rotating the rotary support relative to the chair main body. Since it is provided with an operation conversion mechanism that can convert to a rising operation, for example, an operation conversion mechanism
A rotating force transmitting portion provided on the rotation center end side of the rotating support; and a rotating body provided on the free end side of the rotating support so as to be rotatable integrally with the seat with respect to the rotating support. The rotational force transmitting unit and the rotating body are linked to each other so as to be movable with respect to the rotating body, and the rotational motion of the rotary support is transmitted to the rotating body via the rotational force transmitting unit to transmit the rotational motion. A transmission element that promotes rotation is provided, and the rotation transmission unit and the rotating body are configured by gears and rollers, such as sprockets and pulleys, and the transmission element is configured by a chain or the like. It is possible to realize a configuration in which the seat can be swung by one rotating support without using a complicated mechanism such as a mechanism or a link mechanism. Therefore, it is possible to realize a chair capable of swing operation with a simple mechanism and a simple design.

If the rotating support comprises a cover body having a hollow inside, and the motion conversion mechanism is provided in the cover body, the structure and design of the entire chair can be simplified. Becomes

If the rotary support is one that supports a substantially central position in the width direction of the seat, it can be used in combination with a desk or the like as compared with the one that supports the left and right ends of the seat. Thus, it is possible to flexibly change the pitch of the left and right widths in accordance with the change of the pitch of the left and right widths of the top plate such as a desk.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of the present invention.

FIG. 2 is an explanatory view of the operation.

FIG. 3 is a side view schematically showing the configuration of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chair 12 ... Seat 3 ... Rotation support (arm) 31 ... Cover body 4 ... Motion conversion mechanism 41 ... Rotation force transmission part (1st sprocket) 42 ... Rotating body (2nd sprocket) 43 ... Transmission element ( Chain element) F: Floor surface P: Usage position Q: Standing position

Claims (4)

[Claims] 1. A seat which is supported by a chair body so as to be able to perform a rising operation while swinging between a use position substantially horizontal to a floor surface and a standing position substantially vertical to a floor surface, A rotary support that rotatably supports a seat with respect to the chair body, and an operation conversion mechanism that is provided between the rotary support and the seat and that can convert a rotational motion of the rotary support with respect to the chair body into a rising motion of the seat. A chair comprising: 2. An operation conversion mechanism comprising: a rotation force transmitting portion provided on a rotation center end side of the rotation support; and a rotation end integrally formed with the seat on a free end side of the rotation support. A rotating body provided so as to be rotatable, and a rotating force transmitting unit and a rotating body that are linked to each other so as to be movable with respect to the rotating body. The chair according to claim 1, further comprising a transmission element that transmits the rotation to the rotating body via the rotation element to promote the rotation. 3. The chair according to claim 1, wherein the rotating support includes a cover body having a hollow inside, and the motion conversion mechanism is provided in the cover body. 4. The rotary support member supports one of the seats at a substantially central position in the width direction of the seat.
Or the chair according to 3.