JP5331990B2 - Chair shell - Google Patents

Description

  The present invention relates to a chair shell that constitutes the back and seat of a chair.

Conventionally, various structural materials such as so-called back shells and seat shells made of resin, for example, have been used as a chair that has many backs or constitutes a seat. In such a shell, in order to obtain a desired air permeability and flexibility, an opening is provided over a partial region or the entire surface of the shell, and by changing the size and density of the opening, There has also been proposed one having different flexibility (see, for example, Patent Document 1 and Patent Document 2).
JP 2006-187666 A Japanese Patent No. 3434133

  However, in particular, when focusing on the flexibility of the shell, it is not possible to accurately respond to the movement of the seated person if the flexibility is only partially different as in the above-described patent document. . That is, in the case of a shell used for a chair, it is required to acquire flexibility that can suitably follow the movement of the seated person while suitably supporting the body of the seated person.

  The present invention pays attention to such problems, and provides a chair shell that can be flexed in response to the movement of a seated person.

  In order to achieve such an object, the present invention takes the following measures. That is, the shell of the chair according to the present invention has a shell body that is flexible and can support the body of a seated person, and is provided in the shell body, and by providing a plurality of openings, the opening ratio per predetermined area is increased. And gradually differing opening regions.

  If this is the case, when the seated person bends the shell of the chair with the body by the movement of the seated person, the movement distance is small at a location close to the joint operated by the seated person, and as the distance from the joint increases. The operating distance increases. That is, according to the present invention in which an opening area is provided in the shell of the chair, and an area having higher flexibility than that where no opening is provided, and the opening ratio is gradually changed, the body movement distance is reduced. It is possible to provide a chair that can be suitably adapted to the movement of the seated person, in which the opening ratio is gradually increased to a site where the operating distance is large and the flexibility is set high.

  Here, “gradually” is synonymous with the meaning of gradually changing the flexibility in the present invention, but does not simply mean a portion where the flexibility is partially different. For example, at least three or more stages are possible in a stepwise manner, for example, an intermediate flexible area is interposed between a highly flexible area and a less flexible area in the open area. It is a concept that includes aspects with different flexibility.

  Then, as one of the modes in which the aperture ratio is gradually changed with respect to the opening region, one in which the aperture ratio is gradually changed by gradually changing the distance between the plurality of openings can be given. If it is a thing, even if it is a case where all the magnitude | sizes of opening are set to the same magnitude | size, it is possible to vary an aperture ratio gradually gradually.

  On the other hand, as another mode in which the aperture ratio is preferably gradually changed, the aperture ratio may be gradually changed by gradually changing the size of the opening. If it is such, even if it is a case where the distance of opening is made constant, it is possible to vary an aperture ratio gradually effectively.

  Then, as a specific mode for forming an opening region that is easy to follow by the movement of the seated person, it is desirable that the opening region has a gradually increasing opening ratio as it approaches the periphery. In the seat with the spine at the back of the chair, the movement of the hip bone and femur is usually located near the center of the chair in the width direction, so that the movement of the spine, the hip bone and the femur is preferably easy to follow. can do.

Further, the present invention is characterized in that the shape of the opening is gradually changed from a perfect circle to a flat shape having a gradually increased flattening rate as the opening ratio increases . If it is such , the desired bending characteristic can be easily acquired by setting the direction in which the shell is desired to be bent to the direction in which the opening is flattened.

  According to the present invention, since the flexibility of the chair is gradually changed by providing a partially flexible region in the shell of the chair and further gradually changing the opening ratio, the movement distance of the body is reduced. It is possible to provide a chair that can be suitably adapted to the movement of the seated person, in which the aperture ratio is gradually increased to a site where the operating distance is large and the flexibility is set high.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 5, the chair 1 according to the present embodiment has a leg 2, a support base 3 attached to the upper end side of the leg 2 so as to be horizontally pivotable, and a front part supported by the support base 3. A seat receiver 4, a seat 5 attached to the seat receiver 4, a back support rod 6 having a lower end pivotally supported by the support base 3 and supporting the rear portion of the seat receiver 4, and a backrest 7 attached to the back support rod 6. And so-called swivel chair.

  The backrest 7 serves as a structural member that evenly supports the load applied to the backrest 7 and is supported by the back support 6 and a back cushion (in the figure) provided in front of the back shell 71. And a back cushion cover 72 that covers the back cushion. In the present embodiment, the upholstery 72a of the back cushion cover 72 is configured to be visible from the rear through an opening 711 described later.

  The back shell 71 is mainly composed of a back shell body 710 which is a resin-made elastic plate-like body, that is, a flexible plate-like body, and the upper and lower portions protrude rearward from the center in the height direction, and It has a three-dimensional shape in which the left and right side edges protrude forward from the center in the left-right width direction. A large number of openings 711 are provided in a region above the lumbar support portion 71L that can support the waist of the seated person in the back shell 71, more specifically, in a region above the center in the height direction of the back shell 71. The opening ratio, which is the ratio of the opening 711 in a predetermined region of the back shell 71, is set so as to gradually increase toward the upper edge of the back shell 71. This will be described in detail later. In the following description, the entire region of the back shell 71 in which the opening 711 is provided is referred to as “back shell upper portion 71T” that is the opening region according to the present invention. That is, as shown in FIG. 4 and the like, the back shell 71 is positioned slightly below the back shell upper portion 71T, the back shell central portion 71S that is the central portion in the height direction of the back shell 71, and the back shell central portion 71S. The lumbar support portion 71L and the back shell lower portion 71U, which is a region below the lumbar support portion 71L, are integrally provided.

  The lumbar support portion 71L of the back shell 71 is provided with a deformation inducing means 713 that can be partially deformed more easily than the peripheral portion of the lumbar support portion 71L. In the present embodiment, a slit 713a extending in the left-right width direction is applied as the deformation inducing means 713. The number of slits 713a may be singular or plural, and in the present embodiment, a pair of upper and lower slits 713a are provided that are spaced apart from each other in the height direction.

  As shown in FIGS. 4 and 5, the back shell lower portion 71 </ b> U is integrally or integrally provided with a supported portion 715 that protrudes rearward and is supported by an upper end portion of a lower frame described later. In the present embodiment, a pair of left and right thin plate-like supported portions 715 are applied to the lower end portion of the back shell lower portion 71 </ b> U, that is, the lower end portion of the back shell 71.

  Here, the back shell 71 which is the shell of the chair according to the present embodiment is provided with a back shell body 710 that is flexible and can support the body of the seated person, and the back shell body 710, and has a plurality of openings 711. Provided with a back shell upper portion 71T, which is an opening region in which the opening ratio per predetermined area is gradually changed.

  The back shell upper portion 71T will be described in detail. The back shell upper portion 71T, which is an opening region according to the present invention, is arranged uniformly in the width direction in the arrangement and size of the opening 711 in order to gradually increase the opening ratio as it approaches the upper edge of the back shell 71. By appropriately adjusting the arrangement and size of the openings 711 in the direction, the upper and lower ends are set to a high aperture ratio area 71Ta with a high aperture ratio and a low aperture ratio area 71Tc with a low aperture ratio. In addition, the intermediate aperture ratio region 71Tb having an intermediate aperture ratio is interposed between the high aperture ratio region 71Ta and the low aperture ratio region 71Tc, so that the progressive opening of the back shell 71 becomes closer. The rate is set high, that is, the flexibility of the shell is set high. In the present embodiment, the uppermost edge portion of the back shell upper portion 71T is a non-hole region 71Td where the predetermined dimension opening 711 is not provided. More specifically, in the present embodiment, an aspect is adopted in which the aperture ratio is gradually increased by gradually shortening the distance between the openings 711 from the low aperture ratio area 71Tc to the high aperture ratio area 71Ta. . At the same time, although the hole size is slightly reduced from the low aperture ratio region 71Tc to the high aperture ratio region 71Ta, the shape of the opening 711 is changed from a perfect circle to a relatively short vertical dimension in the width direction. It is assumed that the shape has been changed to an elongated elliptic shape.

  With the configuration as described above, the back shell 71 which is the shell of the chair according to the present embodiment is configured such that the chair shell where the seated person has left the body is moved by the seated person's movement by the back shell upper portion 71T which is an open region. In the case of bending, the operating distance is small at a location close to the joint that the seated person operates, and the operating distance increases as the distance from the joint increases. That is, according to the present invention in which the back shell upper portion 71T, which is an opening area, is provided on the back shell of the chair, and an area having higher flexibility than that where the opening 711 is not provided, and the opening ratio is gradually changed, It is possible to provide a back shell 71 of a chair that can be suitably adapted to the movement at the time of sitting of the occupant, in which the opening ratio is gradually increased from a part with a small movement distance to a part with a large movement distance, and the flexibility is set high. Become.

  Then, as one of the modes in which the opening ratio of the back shell upper portion 71T is preferably gradually changed, the opening ratio is gradually changed effectively by gradually changing the distance between the plurality of openings 711.

  Further, in the present embodiment, since the opening ratio of the back shell upper portion 71T is gradually increased as it approaches the periphery, it is easy to follow the seated person's upper body, particularly in the longitudinal direction.

  In the present embodiment, the shape of the opening 711 is gradually changed from a perfect circle to a flattened shape having a gradually increased flattening ratio as the opening ratio increases. It is set to be easily bent back and forth. Specifically, the opening ratio of the upper portion of the back shell upper portion 71T is gradually set higher as it approaches the upper edge, so that the seated person can put the weight deeply in the back, and the spine can be bent by turning the state for refreshing. It is possible to suitably follow the actions that are normally performed by a seated person, such as an action to be extended, and thus these actions can be suitably performed.

  In addition, according to the present invention, the upholstery 72a is further provided on the side supporting the body of the seated person, and the upholstery 72a is exposed to the opposite side through the opening 711 provided in the backshell upper part 71T. The point that the flexibility of the shell gradually changes in 71T can be clearly recognized in appearance.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, a modification example and a reference example of this embodiment will be described below as an example. In addition, about these modification and reference examples , the same code | symbol is attached | subjected about the component similar to the said embodiment, and the detailed description shall be abbreviate | omitted.
< Reference Example 1>
In the above embodiment, the mode in which the size of the opening 711 is gradually changed is disclosed. However, the opening 711 having the same size as the back shell 71a according to this reference example shown in FIG. It is also possible to constitute the back shell upper part 71T which is the same open area as the embodiment. That is, as in this reference example, the aperture ratio is suitably changed from the high aperture ratio area 71Ta as in the above embodiment to the low aperture ratio area 71Tc through the mediation efficiency area just by gradually changing the distance between the openings 711. It is possible to make it gradually different.
< Reference Example 2>
Further, like the back shell 71b according to the present reference example shown in FIG. 7, the distance between the openings 711 is not changed, and the size of the opening 711 is gradually changed so that the opening area is the same as that of the above embodiment and the reference example. It is also possible to form the back shell upper portion 71T. Thus, even when the distance between the openings 711 is constant, it is possible to configure the back shell upper portion 71T, which is an opening region according to the present invention, in which the opening ratio is effectively varied gradually.
<Modification 3>
Moreover, although the aspect which raised the aperture ratio and raised flexibility as approaching the upper edge was disclosed in the said embodiment, a modification , and a reference example , toward the width direction edge part like the back shell 71c shown in FIG. It is also possible to configure the back shell upper portion 71T which is an opening region with a high opening ratio. With such a configuration, it is possible to suitably follow the movement of the seated person, particularly the upper body.
< Reference Example 4>
On the other hand, like the back shell 71d according to the present reference example shown in FIG. 9, in the back shell upper portion 71T, there can be mentioned an aspect in which the opening ratio is gradually varied radially from the attachment position of the back support rod in the back shell 71. With such a configuration, similarly to the above-described embodiment, not only can the body's upper and lower body motion be suitably followed, but it can also suitably follow an operation of twisting the upper body as in Modification 3. The obtained back shell 71d can be realized.
< Reference Example 5>
And this invention is not restricted to a back shell, It is also possible to apply to the seat shell 51 in a chair as shown in FIG.

As shown in FIG. 11, the chair according to this reference example has a basic configuration that is substantially the same as that of an ordinary folding chair, but from the front-rear direction central portion of the seat shell 51 to the front end. In the meantime, by forming the opening region 51T according to the present invention, a mode in which the flexibility is increased toward the front end portion of the seat shell 51 is realized. Specifically, the aperture area 51T is assumed to have a high aperture ratio area 51Ta, a medium aperture ratio area 51tb, and a low aperture ratio area 51Tc, and the aperture ratio is gradually changed. With such a configuration, it is possible to realize the seat shell 51 that can be flexed suitably according to the movement of the thigh of the seated person.

In addition, the specific configuration of each part is not limited to the above-described embodiment , modification, and reference example , and various modifications can be made without departing from the spirit of the present invention.

The external view which concerns on one Embodiment of this invention. Same as above. The same side view. The rear view. Structure explanatory drawing which shows the principal part which concerns on the same embodiment. Structure explanatory drawing which concerns on the reference example 1 of the embodiment. Structure explanatory drawing which concerns on the reference example 2 of the embodiment. Structure explanatory drawing which concerns on the modification 3 of the embodiment. Structure explanatory drawing which concerns on the reference example 4 of the embodiment. The external view which concerns on the reference example 5 of the embodiment. FIG.

Explanation of symbols

1, 1A ... Chair 71, 71a, 71b, 71c, 71d ... Shell (back shell)
710 ... Shell body (back shell body)
71T ... Opening area (upper part of back shell)
72a ... Upholstery 51 ... Shell (seat shell)
510 ... Shell body (seat shell body)
51T ... Opening area

Claims (4)

A shell body that is flexible and can support the body of a seated person;
Provided in the shell body, comprising an opening region that gradually varies the opening ratio per predetermined area by providing a plurality of openings,
The shell of the chair is characterized in that the shape of the opening is gradually changed from a perfect circle to a flattened shape having a gradually increased flatness as the opening ratio increases. The shell of the chair according to claim 1, wherein the opening area has the opening ratio gradually changed by gradually changing the distance between the plurality of openings. The shell of the chair according to claim 1 or 2, wherein the opening area is formed such that the opening ratio is gradually changed by gradually changing the size of the opening. The shell of the chair according to claim 1, 2, or 3, wherein the opening area has a gradually increasing opening ratio as it comes closer to the periphery.

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