JP3810632B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair capable of a rising operation used in a school or a theater.
[0002]
[Prior art]
Conventionally, as a chair of this type, multiple supports are provided at the required intervals, and when the seated person stands between the supports, the seat body can be automatically raised to the standing position. There is something built in Specifically, this chair uses a spring that fixes both ends of a support shaft penetrating the seat to the support and urges the seat to automatically rotate with respect to the support shaft. The seat is a flip-up type in which the seat is rotated from a use position that is substantially horizontal to the floor surface to a stand-up position that stands substantially vertically.
[0003]
[Problems to be solved by the invention]
However, in this case, since the seat rotates while drawing an arc with the support shaft as a fulcrum, a sufficient separation distance between the chair and a chair or desk located in front must be secured. When the seated person takes off and puts on the seat, the seat is caught on the front end of the seat, making him feel cramped, or causing the seat to be smoothly tilted up and down. However, desks and chairs for lectures at schools, etc. have a demand to increase the number of people in the limited space as much as possible, and there is a demand to make the seat body comfortable enough for the depth of the seat body. It is difficult to ensure a sufficient separation distance between the main body and the chair or desk located on the front end side of the seat main body. In addition, in the upright position, the rear surface of the seat is located on the front side, so the brackets attached to the rear side are located on the front side, and when leaning against the seat, the brackets may hit the back and feel uncomfortable. is there.
[0004]
In view of such problems, recently, a chair that is configured to swing with respect to the chair body, always using the link mechanism or the like from the use position to the standing position while the seat surface is always positioned on the front side. Has been developed.
[0005]
However, the one using the link mechanism as described above uses a pair of front and rear link members that support the front and rear ends of the seat to swing the seat from the use position to the standing position. For this reason, a plurality of link members are required, the structure is likely to be complicated, and the link members are exposed from the outside and have problems such as poor design.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a rotary support that rotatably supports a seat with respect to the chair body, and the chair of the rotary support is provided between the rotary support and the seat. An operation converting mechanism capable of converting a rotational motion with respect to the main body into a rising operation of the seat is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
That is, the present invention comprises a seat supported by the chair body so as to be able to perform a rising operation while swinging between a use position substantially horizontal to the floor surface and a standing position substantially vertical. A rotation support that rotatably supports the seat with respect to the chair body, and an operation conversion that is provided between the rotation support and the seat and that can convert a rotational movement of the rotation support with respect to the chair body into a rising operation of the seat. And a single rotary support member that supports a position approximately in the center in the width direction of the seat and in front of the center in the depth direction with only one rotation support, and in front of the center in the depth direction of the seat in the use position. The present invention relates to a chair characterized in that a stopper for holding a seat in a use position is provided between a part and the rotary support .
[0008]
In such a configuration, for example, the motion conversion mechanism includes a rotational force transmitting portion provided on the rotation center end side of the rotation support body, and the rotation integrally with the seat on the free end side of the rotation support body. A rotating body provided so as to be rotatable with respect to the support body, and a rotational force transmitting portion and a rotating body linked to each other so as to be movable with respect to the rotating body. A transmission element that transmits to the rotating body through the rotational force transmitting section and promotes the rotation, and the rotation transmitting section and the rotating body are configured by gears such as sprockets and pulleys, rollers, and the like. If the transmission element is composed of a chain or the like, it is possible to realize a configuration in which the seat can be swung with a single rotating support without using a complicated mechanism such as a slide mechanism or a link mechanism. Therefore, a chair capable of swinging can be realized with a simple mechanism and a simple design.
[0009]
In addition, since the chair according to the present invention supports a substantially central position in the width direction of the seat with a single rotation support, it supports the left and right ends of the seat when used in combination with a desk or the like. Compared with what is provided, the pitch of the left-right width can be flexibly changed in accordance with the pitch change of the left-right width of a top plate such as a desk.
[0010]
In order to simplify the configuration and design of the entire chair, it is desirable that the rotation support body has a hollow cover body, and the motion conversion mechanism is provided in the cover body.
[0011]
【Example】
An embodiment of the present invention will be described below with reference to the drawings.
[0012]
As shown in FIGS. 1 and 2, the chair 1 is used in combination with a lecture desk 2 when a lecture is given at a school or the like.
[0013]
Hereinafter, a specific configuration of each unit will be described in detail.
[0014]
A plurality of desks 2 are arranged so as to form a line in the front-rear direction, and a top board 21 integrally provided for a plurality of persons along the width direction, and a top board for one person in the top board 21. And a support 22 that supports the central position in the width direction of the region. The support 22 includes a base 23 provided on the floor surface F and a support column 24 provided upright from the base 23.
[0015]
The chair 1 is attached to the front surface of the support 22 in the second and subsequent rows in the desk 2 and is used in combination with the desk 2 on each front row side. The backrest 11 is separate from the backrest 11. And a seat 12 provided on the head. The backrest 11 is provided in the vicinity of the upper end of the column 24 so that the angle can be adjusted. As shown in FIG. 2, the seat 12 is provided so as to be able to perform a rising operation while swinging between an upright position Q standing up substantially vertically from a use position P substantially horizontal with respect to the floor surface F. .
[0016]
In this embodiment, in this embodiment, the seat 12 is rotatably supported via the arm 3 which is a rotation support body, and the support column 24 of the arm 3 is interposed between the arm 3 and the seat 12. An operation conversion mechanism 4 that can convert the rotational motion of the seat 12 into the rising operation of the seat 12 is provided.
[0017]
As shown in FIG. 3, the motion conversion mechanism 4 includes a first sprocket 41 that is a rotational force transmitting portion provided on the base end 3 a side that is the rotation center end of the arm 3, and a tip that is a free end of the arm 3. A second sprocket 42 that is integrally provided with the seat 12 on the 3b side and is rotatable with respect to the arm 3, and is movable with respect to the first and second sprockets 41 and 42; The chain element is a transmission element that is meshed in such a state that it is stretched between the two, transmits the rotational motion of the arm 3 to the second sprocket 42 via the first sprocket 41, and promotes the rotation. 43.
[0018]
The arm 3 is configured by a cover body 31 having a hollow inside, and the motion conversion mechanism 4 including the first and second sprockets 41 and 42 and the chain element 43 is incorporated in the cover body 31. ing. The base end 3a side is attached to a bracket B provided at the lower end portion of the column 24 so as to be rotatable in the forward and reverse directions via a support shaft p, and the seat 12 is connected to the distal end 3b side via a rotation shaft q. Is supported so as to be rotatable in forward and reverse directions.
[0019]
The first sprocket 41 is fixed to the bracket B provided on the lower end side of the column 24 by an appropriate means, and the second sprocket 42 is fixed to the lower surface side of the seat 12 by an appropriate means. is there.
[0020]
The arm 3 also includes a spring (not shown) that urges the rotational movement of the arm 3 and a slurring mechanism (not shown) that applies a braking force to the seat 12 during the rising operation. Has been. Moreover, what is indicated by a symbol S in the figure is a stopper for holding the seat 12 and the arm 3 at the use position P.
[0021]
Next, the operation when the seat 12 is raised in this type of chair 1 will be described.
[0022]
When the load acting on the seat 12 is released when the seated person stands, a spring (not shown) urges the rotational movement of the arm 3, so that the arm 3 is in a position indicated by an imaginary line from a position indicated by a solid line in FIG. 3. Rotate in the direction indicated by the arrow in FIG. When the arm 3 rotates in this way, 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. Rotation in the direction of the arrow, that is, counterclockwise, is urged, and the seat 12 performs a rising operation from the use position P to the standing position Q while swinging as indicated by an imaginary line in FIG.
[0023]
With such a configuration, it is possible to realize a configuration in which the seat 12 can be swung with a single arm 3 without using a complicated mechanism such as a slide mechanism or a link mechanism. Accordingly, the swingable chair 1 can be realized with a simple mechanism and a simple design.
[0024]
If the arm 3 includes a cover body 31 having a hollow inside, and the motion conversion mechanism 4 is provided in the cover body 31, gears, chain elements, and the like are accommodated in the cover body 31. Therefore, the configuration and design of the entire chair 1 can be simplified.
[0025]
Since the arm 3 supports one position in the center of the seat 12 in the width direction, when used in combination with a desk or the like, the desk 3 is more than the one supporting the left and right ends of the seat 12. The pitch of the left and right width can be flexibly changed according to the pitch change of the left and right width of the top plate.
[0026]
Further, since the motion conversion mechanism 4 is configured using a sprocket, the seat 12 can be raised at a constant ratio with a simple configuration.
[0027]
Of course, the configuration of the present invention is not limited to the above-described configuration. For example, the rotational force transmission unit and the rotating body are not limited to the sprocket as described above, and a pulley may be used with the same gear. Of course, it may be a roller or the like. Furthermore, for example, the configuration of the transmission mechanism is not limited to a chain, and may be a wire or the like. Other configurations can be variously modified without departing from the spirit of the present invention.
[0028]
【The invention's effect】
The present invention is implemented with the configuration as described above, and has the following effects.
[0029]
That is, the present invention provides a rotating support body that rotatably supports a seat with respect to the chair body, and a rotational movement of the rotating support body with respect to the chair body that is provided between the rotation support body and the seat for a rising operation of the seat. A motion converting mechanism that can be converted. For example, the motion converting mechanism includes a rotational force transmitting portion provided on the rotation center end side of the rotating support and the seat on the free end side of the rotating support. And a rotating body provided so as to be rotatable with respect to the rotating support body, and the rotational force transmitting portion and the rotating body so as to be movable with respect to each other. A transmission element that transmits the rotational motion of the support to the rotating body via the rotational force transmitting section and promotes the rotation, and the rotation transmitting section and the rotating body are connected to gears such as sprockets and pulleys, When configured with rollers, etc. In addition, if the transmission element is constituted by a chain or the like, a configuration in which the seat can be swung with a single rotation support body without using a complicated mechanism such as a slide mechanism or a link mechanism is realized. Is possible. Accordingly, it is possible to realize a swingable chair with a simple mechanism and a simple design.
[0030]
Furthermore, since the chair according to the present invention supports a substantially central position in the width direction of the seat with a single rotation support, when used in combination with a desk or the like, the chair supports the left and right ends of the seat. Compared with what is present, the pitch of the left-right width can be flexibly changed in accordance with the pitch change of the left-right width of a top plate such as a desk.
[0031]
If the rotation support body includes a cover body having a hollow inside, and the motion conversion mechanism is provided in the cover body, the configuration and design of the entire chair can be simplified.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram 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 body (arm)
31 ... Cover body 4 ... Motion conversion mechanism 41 ... Rotational force transmission part (first sprocket)
42: Rotating body (second sprocket)
43 ... Transmission element (chain element)
F ... Floor P ... Use position Q ... Standing position

Claims (3)

It comprises a seat that is supported by the chair body so as to be able to perform a rising operation while swinging between a use position that is substantially horizontal with respect to the floor surface and a standing position that is substantially vertical.
A rotation support that rotatably supports a seat with respect to the chair body, and an operation conversion mechanism that is provided between the rotation support and the seat and that can convert a rotation motion of the rotation support with respect to the chair body to a rising operation of the seat. with formed by including a door,
Only one rotation support supports the position in the center of the seat in the width direction and the front in the depth direction,
And the stopper which hold | maintains a seat in a use position is provided between the site | part ahead of the depth direction center of the seat in a use position, and the said rotation support body . The motion conversion mechanism is configured to be rotatable with respect to the rotation support integrally with the seat on the free end side of the rotation support and the rotational force transmitting portion provided on the rotation center end side of the rotation support. A rotating body provided on the rotating body, and the rotational force transmitting portion and the rotating body are linked to each other so as to be movable, and the rotational motion of the rotating support is transmitted to the rotating body via the rotating force transmitting portion. The chair according to claim 1, further comprising: a transmission element that transmits to the body and promotes rotation thereof. The chair according to claim 1 or 2, wherein the rotary support body includes a cover body having a hollow inside, and the motion conversion mechanism is provided in the cover body.

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