JPS6198212A - Chair - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a chair.

Modern technical chairs include chairs for various purposes such as office use, learning use, comfort use, various types of work, and physical correction. It is often desirable to have something that allows you to move your body depending on the situation. However, conventional chairs are general Kl! 11The range of motion that allows the person to change their posture is small, and those with a large range of motion have arcuate legs.
Problems with the conventional technology The present invention solves the problems of the prior art, has a large range of motion in which the posture of the sitting person can be changed, and has a large range of motion, which makes it difficult to move. The purpose is to provide chairs.

Means for Solving the Problem (The object of the present invention is to provide a 1 mm, 74 mm, 74 mm, 8.1-6 mm base portion, and a seat front support that connects the seat portion and the base portion. A chair comprising a frame and a seat rear support frame, wherein the seat is provided with a seat front axis at the front part and a seat rear axis at the rear part, and these m-section front axis and m-section rear axis are provided. (extending in the left-right direction of the chair); (5) the seat front support frame includes a base front shaft extending from the seat to the seat, and a base connecting member that holds the base front shaft and the base rear shaft so that they are not separated from each other by more than a certain distance; The seat extends so as to connect the front shaft and the base rear shaft, and is rotatably attached to the seat surface via the seat front shaft, and is rotatable relative to the chair installation surface via the base rear shaft. has been
1. The seat rear support frame extends to connect the seat rear shaft and the base front shaft, is rotatably attached to the seat via the seat rear shaft, and supports the base front shaft. The backrest part is rotatable with respect to the chair installation surface through the seat, and the backrest part has a lower part supported by the seat rear support frame and extends upwardly, and extends upwardly from the waist of the sitter to the upper part of the stomach. This is achieved by the chair, which is characterized in that it has a support part for the backward leaning of the sitter at a position corresponding to the sitter (first invention).

Instead of the above-described one, the backrest portion may be supported by the seat front support frame and extend upward (second invention).

Even in the case of the above-mentioned misalignment, the support part is a shaft extending in the left-right direction of the chair, and the backrest part is rotatably supported by the shaft so that the lower end is at least the height of the waist of the seater. A backrest plate may be provided.

Furthermore, instead of the above-mentioned one, the backrest part can have a seat whose lower part is supported by the seat part and extends upward (third invention).

Example Hereinafter, the present invention will be described in detail based on the accompanying drawings.

1 to 85 show embodiments of the first invention, FIG. 1 is a left side view (symmetrical to the right side view), FIG. 2 is a front view, and FIG. 3 is a rear view. FIG. 4 is a plan view, and FIG. 5 is a bottom view. This chair (1) has a seat part (2), a backrest part (3), a base part (4) in contact with the chair installation surface, a seat front support frame (5), and a seat rear support frame (black). , a stopper (7). The seat part (2) has a seat front shaft (1) at the front end, a seat rear shaft (material) at the rear end, and a cylindrical part through which these shafts (2) are rotatably passed. (on the cloth receiving rack part) and a cushion plate (on the cushion plate) placed on the receiving rack part). The shaft (b) both extends in the left and right directions of the chair, the seat front shaft (e) is divided into left and right parts, and the seat rear shaft e9 is integrated. The base part (4) is located below the rear end of the seat part (2), and more specifically, the base rear shaft (7) is located approximately directly below the support shaft 0υ of the backrest part (3), which will be described later.
It is equipped with a seat part (a base front shaft (6) located almost directly below the 2-in front GA part, and a base connecting member made of a chain that holds these shafts so that they are not separated by a certain distance or more from each other). There is. The base rear axis) is divided into left and right, and the base front axis (6
) are integrated and extend in the left and right direction of the Kyowa chair. The seat front support frame (5) connects the seat front axis and the base rear axis (g), which are each divided into left and right parts, to the inner ends of each left part and the inner ends of each right part. It extends so as to be connected by. The seat rear support frame (6) is connected to the seat rear shaft (2).
and the base front axis 0η are extended to connect with each other at the left end and the right end.

The backrest part (3) is attached to each seat rear support frame (6).
Backrest frame (1) that extends continuously upward from the rear end
The backrest frame is located at a position corresponding to the height of the center of the back of the seater, and the backrest is rotatably attached to the support shaft 0υ. It is equipped with a running board (to). The backrest plate (total) has a rectangular shape when viewed from the front, is disposed such that its lower end is at the height of the lower back of the seater, and the backrest surface has cushioning properties. The stopper (7) is located at the auxiliary portion of the seat front support frame (5) when these frames (5)
, (Ii), a stopper frame (to) provided between them, and a cloth tension member (c). The tension member n has its rear end sewn to the fabric receiving part (2) near the rear axis (2) of the seat, and its front end is formed into a cylindrical part and is supported by a stopper frame 4 passing through the cylindrical part. has been done. This tension member (2)
As will be described later, the seat part (2) is provided in such a manner that it becomes loose when the seat part (2) is in a stable position and tilts backward from the stable position, and becomes tense when the seat part (2) is tilted excessively forward from the stable position. There is. In this example, seat front/rear axis (E), Qη, base front/rear axis (6), seat front/rear support frame (5),
(6) and the backrest frame (to) are made of metal pipes and are constructed as follows. The seat front shaft, the base rear shaft (7), and the seat front support frame (5) connecting these
) are each formed of a single pipe in the shape of a ] character when viewed from the flame side, and both are connected to a stopper frame bracket and a reinforcing frame ring. The base front shaft (6), the seat rear i-frame (6) extending rearward and upward from both ends of the shaft, and the backrest frame (1) further extending from the frame (6) are a single pipe that is U-shaped when viewed from the front. The seat rear axis Q (g) extends beyond the point where it joins the raised bibs. As a result, the seat front support frame (5) can freely rotate with respect to the seat (2) together with the seat front axis), and can freely rotate with the base rear axis with respect to the chair installation surface. Each of the chairs is rotatable with respect to the chair installation surface.Next, the function of the chair Q) based on the structure of the chairs will be described. The front seat support frame (5) and the rear seat support frame (6) extend obliquely so as to intersect with each other when viewed from the left and right sides of the chair. The weight of the chair groove member and the weight of the sitter are such that these frames are at the intersection point (a) when viewed from the side of the chair.
It acts to expand the frame in the vertical direction, but this expansion is caused by the seat part (2) and base part (4) which pivotally support these frames.
) will stop you. On the other hand, these frames (5),
(6) Each front shaft (1) of a seat part (2) and base part (4)
, the seat FS is rotatable with respect to the seat (2) and the chair installation surface via the rear shaft (c) and (2).
(2) will swing relative to the chair installation surface as these frames (5) and (6) rotate. This oscillation is performed as follows. For example, as shown in Figure 6, the seat (
2) moves rearward (indicated by a solid line) from a substantially horizontal position U (indicated by a single point tR line), the seat front support frame (5
) in the upright direction and the seat rear support frame (6) in the tilting direction, the seat (2) rapidly rotates rearward depending on the rotational speed of each frame. move. When performing the opposite operation, a seventh large swing range is obtained. Furthermore, even if a seater rocks the chair by exerting force on the seat or backrest from a stable state, the chair will return to its original stable state once the force is released, making it a rockable chair. It performs the functions of This is because the seat part (2) supports most of the weight of the sitter, and the lateral visual intersection point (4) is the momentary center of the seat rocking.
This seems to be because, as these frames rotate in the same direction, the center of gravity of the seater moves faster than the seater's center of gravity. In this way, the effect of returning to a stable state is obtained by the frames that intersect in the side view of the chair, and these frames are connected to bases that extend in the left-right direction of the chair below the rear end of the seat and below the seat end. By being connected and supported by the rear shaft and the base front shaft (b),
The chair can be rocked while being prevented from falling over.

Therefore, it is possible to prevent the chair from tipping over without requiring a base portion that extends forward and backward from below the front and rear ends of the seat, and the chair can be made compact despite its large movable range. Next, the state of use of the chair (1) shown in FIGS. 8 and 9 will be explained. Figure 8 shows the seated person in a relaxed, natural sitting state, and Figure 9 shows the seated person leaning backwards. However, the inclination of the seat (2) is due to the elastic expansion of the support part due to the weight of the person sitting, so it is slightly tilted forward compared to when the seat is empty.

The backrest part (3) has a support axis 0υ against the backward tilt of the sitter at a position corresponding to the height of the central part of the back of the sitter, so the sitter can tilt his or her upper body in the direction of the backrest part (3). By leaning down, your back will be pressed, and you will feel the pleasure of stretching your lower back and spine. Moreover, the backrest part (3)
Since it is supported by the seat rear support frame (6), it moves differently from the seat (2), and the comfort is further amplified. This amplified pleasure is thought to be obtained based on the following additional effects. The seater is seated on the backrest (
3) by tilting the lower body 1 in the direction), the seat rear support frame (6) is attached to the seat front frame (5).
As mentioned above, the seat (2) rotates backwards with these frames (5) as described above.

(6) Attempt to quickly turn backwards and approach the backrest (3). Therefore, the seater's back is pressed down as shown by the arrow in Figure 9, and the seat (2), which rapidly rotates backwards, pushes the back of the seater's lower body (as shown by the arrow Q), and the rear part of the thigh. will be pressured.

The amplified comfort is thus accompanied by pressure on the rear part of the lower body in a sitting position, which prevents the body from slipping on the seat and makes the pressure on the lower back or stomach more effective. It is thought that this can be achieved by either or both of pressing the waist or back, the rear part of the lower body, and the rear part of the thigh at the same time. The chair (1) has a backrest plate (3) that can be rotated with a support shaft 6I) on the backrest part (3).
).

Therefore, when the seated person tilts his or her upper body toward the backrest portion (3), the first backrest plate (to) is rotated about the axis 6ρ, and is arranged so that it is at least the height of the seated person's waist. The lower end of the backrest plate provided does not press the seater's lower back or back more strongly than the merely fixed support (arrow (73')), further enhancing the aforementioned effect. The stopper (7) becomes tense when the seat (2) tilts forward to a certain extent from the stable state of the chair (1), and prevents the chair (1) from tilting forward. As shown in Figure 7, this occurs when tilting forward from a stable state.
The seat support frame (5) that supports the front end of the fabric tension member (C) also rotates faster than the seat rear support frame (6) that supports the rear end of the fabric tension member (C). This is due to the space between the edges expanding in the vertical direction. When the chair tilts backward from the stable state, as can be seen from FIG. 6, the seat front support frame (5) moves toward the seat rear axis c! 1) K approaches and finally comes into contact with the axis υ, thereby preventing the seat (2) from tilting backwards excessively. The position of the lateral visual chiasm point (→ can be determined as appropriate depending on the purpose and dimensions of the chair, etc.)
Normally, in a natural sitting state, that is, a state in which the seat is substantially horizontal or tilted backwards, it is desirable to set the position near a vertical plane that passes through the center of gravity of the sitter and extends in the left-right direction of the chair. This prevents the chair from shaking during the sitting operation and provides stability. However, in some types of chairs that are used with the feet lifted off the floor after sitting, It is preferable that the seat be set forward from the vertical plane.10 This allows the seater to easily place his or her feet in the air and swing the chair, with the chair rotated backwards after sitting in a stable position. In this way, the position of the lateral visual chiasm point (b) affects the chair stability during the sitting movement because the position of the lateral visual chiasm point (4 is the momentary center of the seat rotation) and the position of the sitter's This seems to be because the seat is most stable when the instantaneous center is within the vertical plane passing through the center of gravity.In other words, when the lateral visual intersection point (4) is in front of the vertical plane, the seating motion is When the lateral visual chiasm point (the seat rotates rearward to move 4 backward to the lateral visual chiasm point) is located behind the vertical plane, the opposite is true. In order to more effectively prevent the chair (1) from falling backwards,
It is preferable that the base rear shaft is located below the rear end of the seat portion, but further back. Of course, it is not necessary to provide it so far back that it impairs the compactness of the chair; for example, it is sufficient to position it approximately directly below the upper end of the backrest (3). Further, the return action when the chair (1) is rocked is stronger as the distance between the front and back axes of the seat and between the front and back axes of the base is greater than the height of the seat in the vertical plane. is set to be larger than the current value.

10 to 12 show an embodiment of the second invention, FIG. 10 is a side view, FIG. 1I is a front view, and FIG.
The figure is a bottom view. This chair (IA) has substantially the same structure as the chair (1) of the above-mentioned example, and similar members and parts are given the same reference numerals in the drawings. Chair (1
-4), the backrest frame (30()) of the backrest (3A), which is different from the chair (1), has its lower end supported by the lower half portions of the two seat front support frames (5). Two shafts extend upwards, and a support shaft (31/n) is attached to them in the same way as chair (1).Chair (IA
) also provides the same comfort as in the chair (1), in which the lower back and back muscles are stretched, and an amplified pleasure in that the rear part of the lower body is also pressed in addition to the lower back or back. Also, while the backrest part (3A) rotates together with the seat front support frame (5), the seat part (2) rotates with both the seat front support frame (5) and the seat rear support frame (6). Compared to the backrest of the movement, the parcel is also the main pulling arm, and the 5th sentence is also the momme ~ the 9th part of the paper is about the rotation calculation, and the speed of the seat (2) is fast. The difference with the dynamic speed tends to decrease. but,
As the seat front support frame (5) rotates rearward, the backrest (3A) rises relative to the sitter and rotates rearward. Or you can get a pressure effect on your back.

13 to 15 show an embodiment of the third invention, FIG. 13 is a side view, FIG. 14 is a front view, and FIG.
The figure is a bottom view. This chair (IB) also has substantially the same structure as the chair (1) of the above-mentioned example, and the same reference numerals are given to like members and parts in the drawings. Chair (1#)
, the seat (2B) is different from the chair (1), and the seat (2B) is rotatably supported on the seat front @) and the seat rear axis QO, and extends in the front-rear direction at the left and right ends of the seat (2B). It is equipped with a frame (c).

Backrest frame (30B) of backrest part (3B)
is provided so as to extend continuously upward from the seat frame), and a backrest plate <32B) is fixed to this. In the chair (lB), the backrest part (
3B) and the seat (2B) rotate at substantially the same speed.

Therefore, the effect based on the relative movement between the backrest and the seat as in the chairs (1) and (IA) cannot be obtained, but these return to the stable seating state at substantially the same speed as described above. As a result of swinging with action, 0
You can get a feeling of use similar to that of dry air. Backrest (
3B) can of course be made slightly movable or rotatable with respect to the seat part (2)K by a sprinter or the like. Also, the backrest plate (32B) and the chair (1).

It may be provided so as to be rotatable by a support shaft as shown in (IA).
Alternatively, as shown in the figure, the backrest plate (32B) can be fixed with a support shaft (313) at the center and a pin at the bottom, and can be rotated by removing the pin. Base part (4B) Base front shaft (4B)
The base rear shaft (40
B) is 1 continuous from the seat front support frame (5).
An extending detail (400) and a cylindrical part (40) through which it passes.
1) And: j, e, i Ao <-2□. , 4□E, Yu□1, I.

The cylindrical parts (411) and (401) are connected to each other.

Accordingly, the shaft parts (400) and (4tO) are rotated when the frames (5) and (6) rotate.
') and the part that contacts the chair installation surface remains stationary, which is advantageous in preventing scratches on the seating surface. Stopper (
7B) is equipped with a metal pipe stopper (2) provided between two seat rear support frames (6) at approximately the height of the frame (6). When the π1 inclination of the seat (2B) becomes excessive, it comes into contact with the seat front support frame (5) and acts to prevent further forward inclination.

In the above example, the axes of the seat and base parts and the frame that extends beyond connecting these axes are shown as being integrated, but it goes without saying that these may be provided separately. . The base connecting member of the receiving frame (2) is shown to be made of cloth and chain, but it may also be made of a material with high rigidity.

However, since it is made of such flexible material, it can be folded, and by making the effective length variable, the height and inclination of the seat can be adjusted. This gives you the advantage of being able to. In the above example, the chair (1
) and (IA), the shape of the backrest can be in addition to the one shown in the example, and can have various shapes suitable for obtaining pressure on the lower back or back by leaning backwards of the seater, such as a pile-shaped shape with a curved side view. It can also be taken as a thing. In addition to the example shown, the stopper may be constructed of a member that tensions or comes into contact when the seat is tilted forward or backward.

Effects of the Invention As is clear from the above, according to the present invention, it is possible to provide a chair that has the following effects.

In other words, the front and rear support frames of the seat, which are arranged so as to intersect when viewed from the side of the chair, are rotatably supported by the seat and base, so that the posture of the living person can be changed. It has a large movable range and can be made compact considering the size of the movable range. In addition, in the first invention in which the backrest is supported by the seat rear support frame and the second invention in which the backrest is supported by the seat front support frame, the seat and the backrest may move differently from each other. By doing so, the sitter can enjoy great pleasure as the lower back and back muscles stretch when tilting the upper body backward. In addition, when the backrest is equipped with a rotatable backrest plate, as the backrest plate rotates, a greater pressing force is obtained from the lower part of the plate, so that when the seater leans back, the seater receives an even greater pressing force. You can get pleasure. According to the third invention, in which the backrest portion is supported by the seat portion, the seat portion and the backrest portion are integrally swung with the action of returning to a stable sitting state, so that the seater can feel the 0-to-low seat position. You can get a similar feeling of use.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the embodiment, Fig. 2 is a front view thereof, Fig. 3 is a rear view thereof, Fig. 4 is a plan view, and Fig. 5 is a side view of the embodiment. The bottom view, FIGS. 6 and 7 are side views schematically showing the swinging state, FIGS. 8 and 9 are side views showing the usage state, and FIG. 10 is a side view of another example.
12 is a bottom view, FIG. 13 is a side view of another example, FIG. 14 is a front view, and FIG. 15 is a bottom view. (1), (IA), (1/l)...chair,
(2), (2B)... Seat part, (3), (3A), (3B)... Backrest part,
(4), C4B>...Base part, (5)...
- Seat front support frame, (6) Seat rear support frame, (1) °... Seat front axis, Qυ... Seat rear axis, G3L (31j), (31B )...Support shaft, (
2), (32j), (32B)...Backrest plate, duck, (40B)...Base rear axis, false.
(41B)... Base front axis, (6), (42B
)...Base connection member. (Above) Figure 4 Figure 5 7''''''1 Procedural amendment (self-imposed January 8, 19851, case description 1982 Patent Application No. 2210732, title of invention Chair 3) , person making the amendment 4, agent

Claims (5)

[Claims] (1) A chair comprising a seat, a backrest, a base that contacts an installation surface when installed, and a front seat support frame and a rear seat support frame that connect the seat and base, The seat is provided with a seat front axis at the front and a seat rear axis at the rear, and the seat front axis and the seat rear axis extend in the left-right direction of the chair, and the base is connected to the seat. A base rear shaft extending in the left-right direction of the chair below the rear end portion, a base front shaft extending in the left-right direction of the chair below the front end of the seat, and the base front shaft and the base rear shaft being separated from each other by a certain distance or more. the seat front support frame extends to connect the seat front shaft and the base rear shaft, and the seat front support frame is connected to the seat via the seat front shaft. The seat rear support frame connects the seat rear shaft and the base front shaft, and is rotatable relative to the chair installation surface via the base rear shaft. The backrest extends, and is rotatably attached to the seat via the seat rear axis, and is rotatable relative to the chair installation surface via the base front axis; The seat is supported by a seat rear support frame and extends upward, and has a support portion for preventing the seater from leaning backwards at a position corresponding to a height from the waist to the upper back of the seater. The chair. (2) The support portion of the backrest portion is an axis extending in the left-right direction of the chair, and the backrest portion is rotatably supported around the axis and arranged such that the lower end is at least the height of the waist of the seater. A chair according to claim 1, characterized in that it is provided with a backrest plate. (3) A chair comprising a seat, a backrest, a base that contacts the installation surface when installed, and a front seat support frame and a rear seat support frame that connect the seat and base, The seat is provided with a seat front axis at the front and a seat rear axis at the rear, and the seat front axis and the seat rear axis extend in the left-right direction of the chair, and the base is connected to the seat. A base rear shaft extending in the left-right direction of the chair below the rear end portion, a base front shaft extending in the left-right direction of the chair below the front end of the seat, and the base front shaft and the base rear shaft being separated from each other by a certain distance or more. the seat front support frame extends to connect the seat front shaft and the base rear shaft, and the seat front support frame is connected to the seat via the seat front shaft. The seat rear support frame connects the seat rear shaft and the base front shaft, and is rotatable relative to the chair installation surface via the base rear shaft. and is rotatably attached to the seat via the rear shaft of the seat, and rotatable relative to the chair installation surface via the front shaft of the base, and the backrest extends from the lower part of the seat. The seat is supported by the seat front support frame and extends upward, and has a support portion for supporting the seater's backward tilt at a position corresponding to any height from the waist to the upper back of the seater. The said chair. (4) The support portion of the backrest portion is an axis extending in the left-right direction of the chair, and the backrest portion is rotatably supported around the axis and arranged such that the lower end is at least the height of the waist of the seater. 4. A chair according to claim 3, characterized in that it is provided with a backrest plate. (5) A chair comprising a seat, a backrest, a base that contacts the installation surface when installed, and a front seat support frame and a rear seat support frame that connect the seat and base, The seat is provided with a seat front axis at the front and a seat rear axis at the rear, and the seat front axis and the seat rear axis extend in the left-right direction of the chair, and the base is connected to the seat. A base rear shaft extending in the left-right direction of the chair below the rear end portion, a base front shaft extending in the left-right direction of the chair below the front end of the seat, and the base front shaft and the base rear shaft being separated from each other by a certain distance or more. the seat front support frame extends to connect the seat front shaft and the base rear shaft, and the seat front support frame is connected to the seat via the seat front shaft. The seat rear support frame connects the seat rear shaft and the base front shaft, and is rotatable relative to the chair installation surface via the base rear shaft. and is rotatably attached to the seat via the rear shaft of the seat, and rotatable relative to the chair installation surface via the front shaft of the base, and the backrest extends from the lower part of the seat. The chair is supported by the seat and extends upward.