JP3790885B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair having a rising function used as a moving seat.
[0002]
[Prior art]
Recently, various mobile seats have been developed to use the gymnasium and other facilities for multiple purposes. For example, this type of mobile seat is supported by a movable traveling frame on the left and right ends of a corrugated floor with different heights, and the corrugated floor is developed into a platform by moving the traveling frame forward and backward. The chair installed on each step floor can be used, or each step floor can be retracted to a position that is substantially flush with the front panel provided at each front end thereof and can be stored compactly.
[0003]
And as a chair used for this kind of traveling bleachers, what is provided is that a plurality of supports are provided at a predetermined interval, and a seat and a backrest are provided between the supports. In this chair, the base end portion of the seat is rotatably supported by the support body, and when the seat stands, the seat automatically rises from the use position to the folding position by a spring force. Yes.
[0004]
By the way, in such a chair, conventionally, it is said that the feeling of holding that the user's back, particularly the waist, can be held by the backrest in the use position so that the user can take an easy posture even when sitting for a long time. It is important. Specifically, the lower back side that supports the user's waist is positioned in a substantially vertical direction so that the backrest is inclined substantially along the shape of the spine of the human body when seated and the waist can be held particularly well. A shape in which the upper end side is bent rearward and upward is considered to be optimal.
[0005]
[Problems to be solved by the invention]
However, when the side view shape of the backrest in the use position is substantially matched to the shape of the human spine and the upper end side is bent rearward and upward with respect to the lower end side, the backrest is in the folded position. The seat and the seat are substantially polymerized and cannot be folded thinly and compactly, and there is a problem that a large amount of storage space is required when storing between the steps.
[0006]
As described above, the conventional chair has a problem that it is difficult to achieve both a good hold feeling of the backrest at the use position and the compactness at the folding position.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a shape change mechanism that can change the shape of the backrest in accordance with the rising operation of the seat, so that the backrest can be changed between the folding position and the use position. It is configured to be able to take an optimal shape.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
That is, the present invention includes a backrest and a seat, and is provided so as to be capable of a rising operation between a use position that is substantially horizontal with respect to the floor surface and a folding position in which the seat is folded so as to be substantially overlapped with the backrest. The present invention relates to a chair comprising a shape changing mechanism that can change the shape of the backrest by utilizing the rising operation of the seat.
[0009]
With such a configuration, the shape of the backrest can be optimized for each situation in the use position and the folding position in accordance with the rising operation of the seat. For example, in accordance with the rising operation of the seat, in the use position, the lower end side of the backrest is positioned along the substantially vertical direction, and the upper end side is substantially bent rearward and the backrest is placed on the human body when seated. On the other hand, it is conceivable to have a side view shape that substantially conforms to the shape of the spine, and a side view shape in which the lower end side and the upper end side are substantially straight at the folding position. In this way, at the use position, the side view shape of the backrest is approximately in line with the shape of the human spine at the time of sitting, and the waist is satisfactorily held at the time of sitting so that no load is applied only to the buttocks and from the waist to the buttocks. It is possible to provide a user with a chair that is easy to get tired even when seated for a long time because of the load. On the other hand, in the folding position, if the shape of the backrest in a side view is substantially straight, the seat and the backrest can be folded thinly, and it is necessary to store them in a storage space in a folded state such as a mobile viewing seat When used for a certain item, it is possible to store it in a very compact manner.
[0010]
In order to achieve both compactness at the folding position and good hold feeling at the use position, the shape changing mechanism makes the shape of the side view of the backrest substantially straight at the folding position, and at the use position. It is desirable that the backrest is deformed using a rising operation of the seat so as to be bent.
[0011]
In order to be able to change the shape of the backrest between the use position and the folding position with a simple configuration, the backrest has a first backrest element located on the upper end side and a second backrest located on the lower end side. And the shape changing mechanism includes at least a rotating member that connects the first and second backrest elements so as to be rotatable in the forward and reverse directions using a rising operation of the seat. It is desirable to have.
[0012]
As a preferred embodiment, it comprises a support body that rotatably supports the seat in the forward and reverse directions, and the shape changing mechanism has one end at the seat and the other end at the lower end of the second backrest element. A first link element rotatably attached in the forward and reverse directions; and a second link element having one end attached to the support and the other end attached to the first backrest element rotatably in the forward and reverse directions. The seat and the first and second backrest elements are connected to each other between the use position and the folding position via the first and second link elements and the rotating member so that the link operation is possible. Is mentioned.
[0013]
【Example】
An embodiment of the present invention will be described below with reference to the drawings.
[0014]
The chair 1 is used for a traveling bleacher or the like. As shown in FIGS. 1 to 5, a plurality of supports 3 are placed in a chair width direction on a beam pipe 2 held at a predetermined height position on the floor. Are provided at predetermined intervals, and a seat 4 and a backrest 5 are provided between the respective supports 3. Then, both sides of the base end portion of the seat 4 are supported on the support body 3 via the support shaft p so as to be capable of a rising operation between the use position P shown in FIG. 2 and the folding position Q shown in FIG. Yes. The support 3 is attached to the beam pipe 2 using a bolt (not shown), and an armrest 6 is attached to the upper end of the support 3 via a pin shaft r so as to be rotatable in the forward and reverse directions.
[0015]
In this embodiment, the present embodiment includes a shape changing mechanism 7 that can change the shape of the backrest 5 between the use position P and the folding position Q by utilizing the rising operation of the seat 4. ing. The shape changing mechanism 7 allows the seat 4 to rise so that the side view shape of the backrest 5 is bent at the use position P and the side view shape is substantially straight at the folding position Q. Is used to deform the backrest 5. Specifically, the backrest 5 is composed of a first backrest element 51 located on the upper end side and a second backrest element 52 located on the lower end side, and these first and second backrest elements 51, 52, the seat 4, and the armrest 6 are connected to each other between the use position P and the folding position Q by the first and second link elements 8 and 9 and the rotating member 10 so as to be able to perform a link operation.
[0016]
Hereinafter, the structure of each part is demonstrated concretely.
[0017]
The seat 4 is rotatably supported by a bearing q provided on the support body 3 side via a support shaft p protruding from the side surface on the base end side. The one end 8a side of the first link member 8 is attached to the support shaft p.
[0018]
The backrest 5 is, for example, a hollow body made by blow molding or the like, and is composed of a first backrest element 51 located on the upper end side and a second backrest element 52 located on the lower end side. The The first backrest element 51 is held on the support body 3 via the second link element 9 so as to be movable up and down. The second link element 9 is provided with bearings 91 and 92 at both ends. One of the bearings 91 is rotatably attached to the pin shaft r of the support 3 and the other bearing 92 is attached to the first backrest element 51. It is rotatably attached to a pin shaft s provided so as to protrude from the side surface. And this 1st backrest element 51 is connected with the 2nd backrest element 52 through the rotation member 10 provided in the lower end part so that rotation in the forward / backward direction mutually is possible. The rotating member 10 includes a bearing 10a provided on the first backrest element 51 side, and a shaft portion 10b provided on the second backrest element 52 and supported by the bearing 10a so as to be rotatable in the forward and reverse directions. is doing. The second backrest element 52 is rotatably attached to the other end side of the first link element 8 via the connecting pin t with an arm portion 52a provided at the lower end thereof.
[0019]
The armrest 6 has a U-shaped cross-section and is attached to the upper end portion of the support body 3 via the pin shaft r so as to be rotatable in the forward and reverse directions. When no external force is applied, the upper end rises. The center of gravity is set so as to rotate. And when the 2nd link element 9 rotates upwards by the raise of the backrest 5, it is pressed by this link element 9 and rotates to a horizontal use position.
[0020]
Next, the operation of the chair 1 will be described.
[0021]
In this case, when a load is applied to the seat 4 by sitting, the seat 4 rotates in the horizontal direction against the urging force of a spring (not shown), and the use position P as shown in FIGS. Retained. At this time, since the rear end side of the first link element 8 provided on the base end side of the seat 4 is raised, the backrest 5 is lifted upward and the armrest 6 is in a horizontal posture. At this time, the second backrest element 52 is positioned along the substantially vertical direction, and the first backrest element 51 is set to bend rearward and upward due to its own weight. In this embodiment, a stopper mechanism (not shown) is provided to hold this bent state at an optimal position where the back of the seated person can be satisfactorily held.
[0022]
On the other hand, when the load acting on the seat 4 is released by standing, the seat 4 is rotated in the upright direction by a biasing force of a spring (not shown), and the backrest 5 is lowered accordingly, and the seat 4 is moved to the front surface of the backrest 5. The folding position Q shown in FIG. 3 and FIG. Since the rising operation is caused not only by the weight acting on the backrest 5 but also by the biasing force of the spring, the seat 4 can be used even if a light weight such as a blow molded product is used as the backrest 5. It is possible to stand up reliably. At this time, in the present embodiment, the first and second backrest elements 51 and 52 are set to be folded so that the shape of the backrest 5 as a whole is substantially straight.
[0023]
With such a configuration, it is possible to optimize the shape of the backrest 5 at each of the use position P and the folding position Q in accordance with the rising operation of the seat 4. As in this embodiment, at the use position P, the lower end side of the backrest 5 is positioned along the substantially vertical direction, and the upper end side is positioned substantially bent rearward and the backrest 5 is seated in the human body. If the side view shape approximately conforms to the spine shape of the chair, the chair 1 is used to hold the waist well when sitting, so that no load is applied only to the buttocks and the load is transmitted from the waist to the buttocks, so that even if sitting for a long time, the chair 1 is not fatigued. Can be provided. On the other hand, at the folding position Q, if the side view shape is such that the lower end side and the upper end side are substantially straight, the seat 4 and the backrest 5 can be folded thinly, as in this embodiment. When it is used as a chair for a moving seat, it can be stored in a very compact manner.
[0024]
The shape changing mechanism 7 causes the backrest 5 to have a substantially straight shape when viewed from the side at the folding position Q, and uses the rising operation of the seat 4 so that the backrest 5 is bent at the use position P. Since it is to be deformed, it is possible to achieve both compactness at the folding position Q and good holding feeling at the use position P.
[0025]
The backrest 5 includes a first backrest element 51 located on the upper end side and a second backrest element 52 located on the lower end side, and the shape changing mechanism 7 includes the first and second shape changing mechanisms 7. Since at least the rotating member 10 that connects the backrest elements 51 and 52 of the seat 4 to each other in the forward and reverse directions by using the rising operation of the seat 4 is provided, the shape of the backrest 5 is used with a simple configuration. It is possible to change between the position P and the folding position Q.
[0026]
The support 3 supports the seat 4 so as to be rotatable in forward and reverse directions, and the shape changing mechanism 7 has one end at the seat 4 and the other end at the lower end of the second backrest element 52 in the forward and reverse direction. And a second link element 9 having one end rotatably attached to the support 3 and the other end rotatably attached to the first backrest element 51 in the forward and reverse directions. The seat 4 and the first and second backrest elements 51 and 52 are connected to the use position P and the folding position Q via the first and second link elements 8 and 9 and the rotating member 10. If it is connected so that the link operation is possible, the shape of the backrest 5 can be deformed between the use position P and the folding position Q by making good use of the rising operation of the seat 4 with a simple configuration. is there.
[0027]
Of course, the configuration of the present invention is not limited to the above-described configuration. For example, the configuration of the shape changing mechanism is not limited to that described above. 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 includes a backrest and a seat, and is provided so as to be capable of a rising operation between a use position that is substantially horizontal with respect to the floor surface and a folding position in which the seat is folded so as to be substantially overlapped with the backrest. And a shape changing mechanism that can change the shape of the backrest by utilizing the rising operation of the seat, so that the shape of the backrest and the folding position can be folded according to the rising operation of the seat. It can be optimized for each situation at the position, and for example, it is possible to provide the user with a good hold feeling at the use position and compact storage at the folding position. Become.
[0030]
If the shape changing mechanism is such that the side view shape of the backrest is substantially straight at the folding position, and the backrest is deformed using the rising operation of the seat so that it is bent at the use position. For example, it is possible to achieve both compactness at the folding position and good hold feeling at the use position.
[0031]
The backrest includes a first backrest element positioned on the upper end side and a second backrest element positioned on the lower end side, and the shape changing mechanism includes the first and second backrest elements. If there is at least a rotating member that can be rotated in the forward and reverse directions using the rising operation of the seat, the shape of the backrest can be changed between the use position and the folding position with a simple configuration. It is possible to get.
[0032]
A support body that rotatably supports the seat in a forward and reverse direction is provided, and the shape changing mechanism is attached to one end of the seat and the other end to the lower end of the second backrest element so as to be rotatable in the forward and reverse directions. A first link element and a second link element having one end attached to the support and the other end rotatably attached to the first backrest element in the forward and reverse directions. 1. If the second backrest element is connected to the use position and the folding position via the first and second link elements and the rotating member so that the link operation can be performed, the seat can be simply configured. It is possible to change the shape of the backrest between the use position and the folding position by making good use of the rising operation of this.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a side view showing a chair in the same use position.
FIG. 3 is a side view showing a chair in the folding position.
FIG. 4 is a side view showing a chair in the same use position.
FIG. 5 is a side view showing a chair in the folding position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Chair 3 ... Support body 4 ... Seat 5 ... Backrest 51 ... 1st backrest element 52 ... 2nd backrest element 7 ... Shape change mechanism 8 ... 1st link element 9 ... 2nd link element 10 ... Rotating member P ... Use position Q ... Folding position

Claims (3)

A backrest having a first backrest element located on the upper end side and a second backrest element located on the lower end side, and a seat supported by the support so as to be rotatable in forward and reverse directions, and it provided Rising operatively between a folded position to fold the seat so as to be substantially polymerized and the backrest substantially horizontal use position to the floor surface,
A chair configured with a shape changing mechanism that can change the shape of the backrest by utilizing the rising operation of the seat ,
The shape changing mechanism includes a first link element that connects the seat and the second backrest element, and a second link element that connects the support and the first backrest element. The seat and the first and second backrest elements are connected so as to be linkable between the folding position and the use position.
The first backrest element and the second backrest element are positioned in a substantially straight line in the folding position so that the side view shape of the backrest is in a substantially straight line, and the first backrest element is tilted rearward and upward in the use position. A chair characterized by the side view of the backrest being bent . When the seat rotates in the horizontal direction, the first link element provided on the base end side of the seat is lifted upward to raise the backrest, and the second link element rotates upward and While the first backrest element bends upward and rearward to assume the use position,
When the seat is rotated in the standing direction, the backrest is lowered, and the first backrest element is substantially aligned with the second backrest element in a side view so that the seat overlaps with the front of the backrest. The chair according to claim 1 to be taken . Further comprising an armrest supported by the support so as to be rotatable in forward and reverse directions;
3. The chair according to claim 2, wherein an upper end of the armrest rotates upward in a folding position and reversely rotates so as to be pressed by the second link element in a use position and take a horizontal posture .

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