JP6915863B2 - Chair - Google Patents

Description

The present disclosure relates to chairs.

Conventionally, there is a chair in which the seat body is provided with a plate-shaped member that receives the load of the seated person. In such a chair, if the flexibility of the plate-shaped member is not appropriate, the sitting comfort may become uncomfortable. The chair described in Patent Document 1 below is intended to improve sitting comfort by forming a large number of through holes in the bottom plate, which is a plate-shaped member, to make the bottom plate easy to bend.

Japanese Unexamined Patent Publication No. 2005-34298

The degree of flexibility required for the plate-shaped member constituting the seat varies depending on the position of the plate-shaped member. For example, the vicinity of the posterior ischial bone (ischial tuberosity) may require a relatively high degree of flexibility as compared with the anterior region.

The present disclosure provides a technique capable of imparting appropriate flexibility to the sitting body.

The first aspect of the present disclosure is a chair provided with a seat body having a seating surface, wherein the seat body has a plate-shaped portion which is a plate-shaped member, and the plate-shaped portion has the plate-shaped portion. A plurality of holes are formed on the main surface of the plate-shaped portion, and the plurality of holes include a plurality of front holes formed relatively forward and a plurality of rear holes formed relatively rearward. The volume of each of the plurality of rear holes is larger than the volume of each of the plurality of front holes.

With such a chair, the flexibility of the portion of the plate-shaped portion where the rear hole is formed can be increased as compared with the portion where the front hole is formed and the portion where the hole is not formed. As a result, the sitting body can be provided with appropriate flexibility. For example, the flexibility of the load-bearing portion of the ischial tuberosity can be increased.

In the chair described above, the plurality of front holes are formed at positions on the front side of the plate-shaped portion in the front-rear direction with respect to the central portion in the front-rear direction, and the plurality of rear holes are formed from the central portion of the plate-shaped portion. May be formed at a position on the rear side. With such a chair, the flexibility behind the plate-shaped portion can be increased more than the flexibility of the front portion of the plate-shaped portion.

In such a case, the sum of the volumes of the plurality of rear holes may be larger than the sum of the volumes of the plurality of front holes. With such a chair, the flexibility behind the plate-shaped portion can be increased more reliably.

Further, in the chair of the first aspect of the present disclosure described above, the plurality of holes may be formed so that the volume gradually decreases from the rear to the front. With such a chair, the flexibility of the plate-shaped portion can be gradually changed. Therefore, it is possible to prevent the seated person from feeling uncomfortable due to a sudden change in flexibility.

Further, in the chair of the first aspect of the present disclosure described above, at least one slit may be formed in the plate-shaped portion at a position along the outer edge of the main surface. In such a chair, the flexibility can be greatly changed by the slit.

As described above, when the chair is provided with at least one slit, the at least one slit may be formed at a position rearward of the central portion in the front-rear direction of the plate-shaped portion. With such a chair, the flexibility of the rear portion of the plate-shaped portion can be adjusted by a slit.

Further, as described above, when the chair is provided with at least one slit, the plate-shaped portion is located behind the plate-shaped portion and at a central position in the left-right direction of the plate-shaped portion. It may have a region in which at least one slit is not formed.

With such a chair, the flexibility of the central portion in the left-right direction can be made relatively lower than that of the surroundings behind the plate-shaped portion. As a result, while increasing the flexibility of the two left and right ischial tuberosity-bearing portions of the plate-shaped portion, it is possible to prevent the seated person from feeling uncomfortable due to excessive bending of the plate-shaped portion.

1A is a front perspective view of the chair in the used state, FIG. 1B is a front perspective view of the chair in the stowed state, and FIG. 1C is a rear perspective view of the chair in the used state. FIG. 2A is a front view of the chair, and FIG. 2B is a right side view of the chair. It is a top view of the plate-shaped part. 4A is a side view of the plate-shaped portion, FIG. 4B is a sectional view taken along line IVB-IVB of FIG. 4C, and FIG. 4C is a bottom view of the plate-shaped portion. FIG. 5A is a plan view of the frame portion, and FIG. 5B is a right side view of the frame portion. FIG. 6A is a bottom view of the cushion portion attached to the plate-shaped portion, FIG. 6B is a side view of the plate-shaped portion, the front end portion is a VIB-VIB cross-sectional view, and FIG. 6C is a cross-sectional view of the cushion portion. It is a plan view. It is a top view of the plate-shaped part of the modification. It is sectional drawing of the plate-shaped part of the modification. 9A and 9B are perspective views of holes formed in the plate-shaped portion of the modified example. It is a front perspective view of the chair of a modified example.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. Embodiment]
[1-1. overall structure]
As shown in FIGS. 1A-1C and 2A-2B, the chair 1 includes a backrest 2, a pair of left and right legs 3, and a seat body 4. The chair 1 is a nesting chair capable of storing the same chair 1 in the front-rear direction, that is, so-called nesting.

The backrest 2 has a plate-like member having an arc shape that is convex toward the rear in a plan view, so that the backrest 2 has a shape that follows the back of the seated person as a whole. A pair of dorsal connecting pieces 11 extending downward are formed at the lower ends of the backrest 2 on both the left and right sides.

The legs 3 are symmetrical. Two columnar members, a front leg 3a and a rear leg 3b, are provided on each of the left and right sides of the leg portion 3. The front leg 3a is a columnar member extending so as to be located forward toward the lower side, and the rear leg 3b is a columnar member extending so as to be located rearward toward the lower side. Further, the leg portion 3 includes a support frame 3c extending in the left-right direction so as to connect the upper ends of the two pairs of left and right front legs 3a and the rear legs 3b. The support frame 3c includes a pair of support-side connecting pieces 13 that extend upward from the upper portions of the support frame 3c on the left-right end sides and connect with the pair of dorsal-side connecting pieces 11.

The pair of dorsal connecting pieces 11 and the pair of supporting side connecting pieces 13 are arranged in a positional relationship so as to sandwich the rear end side of the seat body 4 from the left and right, and the shaft member 15 extending the seat body 4 in the left-right direction is provided. It is rotatably fixed as a rotating shaft. As a result, the seat body 4 can rotate between the used state shown in FIGS. 1A and 1C and the stored state shown in FIG. 1B. The used state is a state in which the seating surface of the seat body 4 is tilted so as to be a surface along the ground, and the stored state is a state in which the seating surface of the seat body 4 intersects the ground.

[1-2. Seat]
The seat body 4 is a portion of the chair 1 in which a seated person can be seated, is substantially rectangular in a plan view, and has a plate-shaped portion 21, a frame portion 23, and a cushion portion 25. In the description of the present embodiment, the front-back and left-right directions refer to the front-back and left-right directions as seen from the seated person of the chair 1 when the chair 1 is in use.

As shown in FIGS. 3 and 4A to 4C, the plate-shaped portion 21 is a member whose main surface is plate-shaped. The plate-shaped portion 21 is a member that has a symmetrical shape, extends in a substantially horizontal direction, and can support the seated person by receiving the load of the seated person. A plurality of holes 31 are formed on the main surface of the plate-shaped portion 21.

A plurality of holes 31 will be described. The plurality of holes 31 are formed so that the volume gradually decreases from the rear to the front. More specifically, the hole 31 has the same volume from the rear end to a position advanced about 1/3 of the length of the plate-shaped portion 21 in the front-rear direction, and the hole 31 in front of the position has the same volume. The volume gradually decreases by about 31. The hole 31 of the present embodiment is a through hole, and the cross-sectional area of the plate-shaped portion 21 in the expanding direction is constant. Therefore, it can be said that the plurality of holes 31 are formed so that the hole diameter gradually decreases from the rear to the front.

Further, the plurality of holes 31 described above can be described as follows.
The plurality of holes 31 include a plurality of front holes formed relatively forward and a plurality of rear holes formed relatively rearward. For example, in FIG. 3, a plurality of holes 31 formed in the region 61 on the front side of the central portion in the front-rear direction of the plate-shaped portion 21 can be the above-mentioned front holes. Further, the plurality of holes 31 formed in the region 63 on the rear side of the central portion can be the above-mentioned rear holes. The volume of each of the plurality of rear holes is larger than the volume of each of the plurality of front holes. Also, the sum of the volumes of the plurality of rear holes is larger than the sum of the volumes of the plurality of front holes.

Further, two slits 33 and two slits 35 are formed in the plate-shaped portion 21. These slits are formed so as to have a length in a direction along the outer edge at a position along the outer edge on the main surface of the plate-shaped portion 21. Further, those slits are formed in the above-mentioned rear side region 63. It should be noted that the outer edge of the plate-shaped portion 21 on which the slit is formed is not located directly under the ischial tuberosity at least when the seated person is properly seated on the ischial tuberosity 4, and is spaced from directly under the ischial tuberosity. The position.

Specifically, the two slits 33 are formed separately on the left and right behind the plate-shaped portion 21. The plate-shaped portion 21 has a region 37 in which a slit is not formed at a central position of the plate-shaped portion 21 in the left-right direction. The two slits 35 are formed at the left and right ends of the rear region 63, respectively.

Further, as shown in FIGS. 4B and 4C, a groove 38 along the outer edge and a plurality of female screws 39 are formed in the vicinity of the outer edge of the plate-shaped portion 21. These are used for connecting the plate-shaped portion 21 with the frame portion 23 and the cushion portion 25.

The frame portion 23 has a symmetrical shape, and as shown in FIG. 5A, is a substantially rectangular frame body having four rod-shaped members as a framework. The frame portion 23 is provided with a ridge 41, a screw hole 43, a contact portion 45, and a connecting piece 47.

The ridge 41 is provided over the entire circumference of the frame portion 23, and is configured to be insertable into the groove 38 of the plate-shaped portion 21.
The screw hole 43 is provided at a position corresponding to the female screw 39. The plate-shaped portion 21 and the frame portion 23 are fixed by fastening a screw (not shown) to the female screw 39 through the screw hole 43.

The contact portion 45 projects downward from the left and right portions of the frame portion 23, and comes into contact with the support frame 3c when the chair 1 is in use. The support frame 3c receives the load applied to the seat 4 via the contact portion 45.

The connecting piece 47 projects upward from the left and right portions of the frame portion 23. A through hole 49 in the left-right direction is formed in the connecting piece 47. The through hole 49 is configured so that the shaft member 15 can be inserted. When the shaft member 15 is inserted into the through hole 49, the tip of the inserted shaft member 15 is fixed to the dorsal connecting piece 11. As a result, the seat body 4 can rotate around the shaft member 15.

The cushion portion 25 is attached to the plate-shaped portion 21 as shown in FIGS. 6A to 6C. The cushion portion 25 has a cushion material 51 and an upholstery 53 that covers the cushion material 51. The upholstery 53 covers the cushion material 51 arranged on the upper side surface of the plate-shaped portion 21 from above. The end portion of the 53 is wound around the lower side surface of the plate-shaped portion 21 and inserted into the groove 38, and is fixed to the plate-shaped portion 21 by the tacker needle 55. The front surface of the Zhangji 53 is the seating surface on which the user (seat) is seated.

Then, the seat body 4 is assembled by fixing the plate-shaped portion 21 to which the cushion portion 25 is attached and the frame portion 23 with screws. The front end of the seat 4 has a shape that hangs downward.

[1-3. effect]
According to the embodiment described in detail above, the following effects can be obtained.
(1a) In the chair 1 of the present embodiment, the flexibility of the plate-shaped portion 21 can be adjusted by forming a plurality of holes 31 in the plate-shaped portion 21, thereby appropriately adjusting the flexibility of the seat body 4. Can be. Therefore, it is possible to improve the sitting comfort when the seated person is seated in the chair 1.

Specifically, since the plurality of holes 31 are provided so that the volume becomes smaller toward the front and the hole diameter gradually becomes smaller toward the front, the plate-shaped portion 21 having a large volume of the holes 31 is provided. The rear is more flexible. Since the load of the seated person is often applied mainly to the rear of the seat body 4, the high flexibility of the rear portion improves the sitting comfort.

Further, by reducing the volume of the front hole 31, it is possible to make the portion where the thighs come into contact with appropriate flexibility and prevent the front portion of the seat 4 from bending too much. Therefore, the seat body 4 can be in a preferable state for the seated person.

In the above embodiment, the flexibility of the plate-shaped portion is adjusted by gradually changing the hole diameter (volume) in the plate-shaped member having the same thickness. In this case, as compared with the case where the thickness of the plate-shaped portion is gradually reduced toward the front, the fluidity at the time of molding the resin is less affected, and unexpected deformation after molding caused by uneven thickness is suppressed. Therefore, a stable plate-shaped portion can be obtained while controlling the bending.

Further, for example, the front flexibility is higher than that of the plate-shaped portion in which the flexibility of the plate-shaped portion is adjusted by adjusting the number of holes having a constant hole diameter (volume), in other words, adjusting the hole density. It is possible to slow down the change and reduce the discomfort when seated. When the size of the hole 31 provided in front of the plate-shaped portion 21 is the same as that of the rear hole 31, it is necessary to reduce the number of holes in order to reduce the flexibility of the front portion of the plate-shaped portion 21. There is. Here, comparing the case where one large hole is formed in the plate-shaped portion and the case where a plurality of small holes are dispersed and formed, it is more flexible in the width direction to form the small holes in a dispersed manner. The change in sex becomes gradual. Since it is necessary to greatly change the flexibility behind the plate-shaped portion 21, it is less necessary to slow down the change in flexibility.

(1b) In the chair 1 of the present embodiment, the flexibility of the plate-shaped portion 21 is adjusted by providing the slit 33 and the slit 35 in the plate-shaped portion 21, thereby making the flexibility of the seat body 4 appropriate. can do. Therefore, it is possible to improve the sitting comfort when the seated person is seated in the chair 1.

Here, since the slit 33 and the slit 35 are formed in the region 63 on the rear side, the flexibility of the rear portion of the seat body 4 can be increased.
As shown in FIG. 3, the slit 33 is provided along the rear outer edge of the plate-shaped portion 21, but is not provided at the central portion in the left-right direction. Further, the slit 33 and the slit 35 are not connected at the rear left end and the rear right end of the plate-shaped portion 21. The slit 35 is formed long along the outer edges of the left and right sides.

Since the slits are formed in this way, the effect of improving the flexibility due to the slits is low in the central portion in the left-right direction, and the flexibility is highly improved in the left side region 65 and the right side region 67 in the rear side region 63. .. That is, the flexibility can be highly improved in the portion corresponding to the ischial tuberosity at the two left and right positions where the load is most strongly applied when the seated person is seated (when seated). Further, since the slit is not formed in the center of the plate-shaped portion 21 in the left-right direction, it is possible to prevent the central portion of the plate-shaped portion 21 from bending too much when seated. Further, since the slits are not formed at the rear left and right ends, it is possible to prevent the rear left and right ends of the plate-shaped portion 21 from bending too much.

Further, since the slit 33 and the slit 35 are provided along the outer edge of the plate-shaped portion 21, no discomfort is given. That is, it is possible to impart appropriate flexibility to the plate-shaped portion 21 by gently changing the portion that easily comes into contact with the seated person and greatly changing the portion that does not easily come into contact with the seated person.

[2. Other embodiments]
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and it goes without saying that various embodiments can be taken as long as they belong to the technical scope of the present disclosure.

(2a) The shapes and arrangements of the plurality of holes 31 illustrated in the above embodiment are not limited to the configurations disclosed in the above embodiment.
For example, in the above embodiment, the hole 31 arranged in the front area 61 is a front hole, the hole 31 arranged in the rear area 63 is a rear hole, and the volume of the front hole is larger than the volume of the rear hole. The configuration in which is also smaller is illustrated.

However, the volume of the plurality of front holes formed in the first region located relatively forward is smaller than the volume of the plurality of rear holes formed in the second region behind the first region. If so, the mode of the plurality of holes is not limited to the configuration of the above embodiment. For example, in any region other than the first region and the second region of the plate-shaped portion, any hole may be provided in any mode. The above-mentioned volume can be, for example, the average volume of holes in each of the first region and the second region.

Further, in the region where a plurality of front holes exist (front region) and the region where a plurality of rear holes exist (rear region), the front region is arranged in front of the rear region. If so, the position, size, etc. of those areas are not particularly limited. For example, the front side region and the rear side region may be a part of the plate-shaped portion 21.

(2b) Further, the number of holes 31 formed may be uneven on the main surface of the plate-shaped portion 21. For example, the smaller volume holes 31 formed in the front region 61 may be formed more or less per same area than the holes 31 formed in the rear region 63. It may be formed. It is conceivable that the sum of the volumes of the holes 31 provided in the front region 61 is smaller than the sum of the volumes of the holes 31 formed in the rear region 63. Thereby, the flexibility of the region 63 on the rear side can be sufficiently increased.

(2c) Further, in the above embodiment, the plurality of holes 31 are formed so that the volume gradually decreases from the rear to the front, that is, the plurality of holes 31 have a large number of stages. The configuration in which the hole 31 having a larger volume is arranged in the rear is illustrated. However, the plate-shaped portion 21 is not particularly limited as long as it has a structure in which the volume changes in a stepwise manner of at least two steps or more. By adjusting the volume in three or more stages, it is possible to reduce a sense of discomfort due to a change in flexibility. Further, a hole having a relatively large volume may be formed in the region on the front side, or a hole having a relatively small volume may be formed in the region on the rear side. Even in these cases, it is conceivable that the sum of the volumes of the holes 31 provided in the front region 61 is smaller than the sum of the volumes of the holes 31 formed in the rear region 63.

(2d) Further, the plurality of holes 31 may not be formed on the entire main surface of the plate-shaped portion 21 as shown in the above embodiment. For example, as shown in FIG. 7, it may be formed only in a part of the plate-shaped portion 21.

(2e) Further, the plurality of holes 31 do not have to be through holes. For example, it may be a hole that does not penetrate, such as the hole 31a shown in FIG. When forming such a hole in the plate-shaped portion 21, the hole may be formed on any surface of the plate-shaped portion 21, but by forming at least a part on the back surface, for example, in the stored state, the hole is formed. It can be configured to be visible from the outside. In this case, the user can visually recognize that the flexibility of the seat body 4 is adjusted, and the aesthetic appearance can be improved by arranging the holes. Further, when the diameter of the opening of the hole 31 is changed in a gradation shape from the rear to the front as in the chair 1 of the above-described embodiment, it has an aesthetic appearance that visually appeals the flexibility effect to a higher degree. Can be made.

(2f) The shape of the hole provided in the plate-shaped portion 21 is not particularly limited. For example, it may have a cross-sectional shape that changes in the depth direction. For example, as shown in the holes 31b and 31c shown in FIGS. 9A and 9B, the shape may be such that the cross-sectional area becomes smaller in the depth direction of the holes. Further, for example, the cross-sectional shape of the hole in the vicinity of the surface of the plate-shaped portion 21 is rectangular, but the cross-sectional shape may be changed so that the inner portion is circular.

(2g) The arrangement of the slits is not limited to the configuration of the above-described embodiment. For example, only one of the slit 33 and the slit 35 may be formed in the plate-shaped portion 21. Further, slits other than the slit 33 and the slit 35 may be formed. Further, a slit may be formed in the region 61 on the front side.

(2h) The specific configuration of the backrest 2, the legs 3, and the seat 4 constituting the chair 1 is not limited to the configuration of the above embodiment. For example, the backrest 2 may not be provided. Further, the structure may be such that nesting is not possible, or the seat body may not rotate.

Further, the plate-shaped portion has a certain size, and if it is a member that can support the seated person by receiving the load of the seated person, the specific shape of the plate-shaped portion and the provision of the plate-shaped portion in the seat body. The range to be used is not particularly limited.

Further, the seat body 4 does not have to have the cushion portion 25. For example, as in the chair 1a shown in FIG. 10, the seat plate 21a may be configured to come into contact with the seated person. In this case, the above-mentioned seat plate corresponds to the plate-shaped portion. The hole 31 is located on the upper surface side of the seat plate 21a in the used state. Therefore, in this chair 1a, the user can visually recognize that the flexibility of the seat plate 21a is adjusted even in the used state.

(2i) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. .. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment. It should be noted that all aspects included in the technical idea specified from the wording described in the claims are embodiments of the present disclosure.

1 ... Chair, 1a ... Chair, 3 ... Leg, 3a ... Front leg, 3b ... Rear leg, 3c ... Support frame, 4 ... Seat body, 11 ... Back side connecting piece, 13 ... Supporting side connecting piece, 15 ... Shaft member , 21 ... Plate-shaped part, 21a ... Seat plate, 23 ... Frame part, 25 ... Cushion part, 31 ... Hole, 31a ... Hole, 31b ... Hole, 33 ... Slit, 35 ... Slit, 37 ... Area, 38 ... Groove, 39 ... female screw, 41 ... ridge, 43 ... screw hole, 45 ... contact part, 47 ... connecting piece, 49 ... through hole, 51 ... cushion material, 53 ... upholstery, 55 ... tucker needle, 61 ... front side Area, 63 ... rear side area, 65 ... left side area, 67 ... right side area

Claims (12)

A chair with a seating surface
The seat body has a plate-shaped portion which is a plate-shaped member, and has a plate-shaped portion.
The plate portion is
Is formed on the major surface of the plate-shaped portion, and a plurality of holes are opening a circular or rectangular,
It has at least one slit formed at a position along the outer edge of the main surface.
The plurality of holes include a plurality of front holes formed relatively forward and a plurality of rear holes formed relatively rearward.
A chair in which the volume of each of the plurality of rear holes is larger than the volume of each of the plurality of front holes. In the chair according to claim 1,
The at least one slit includes a rear slit extending in the left-right direction along the outer edge of the rear portion of the plate-shaped portion, and a lateral slit extending in the front-rear direction along the left and right outer edges of the plate-shaped portion. Chair. In the chair according to claim 2.
A chair having a region between the rear slit and the side slit, in which a part of the plurality of holes is formed and at least one slit is not formed. In the chair according to claim 2.
A chair having a region in front of the rear slit and on the center side in the left-right direction of the lateral slit, in which a part of the plurality of holes is formed and at least one slit is not formed. .. In the chair according to any one of claims 1 to 4.
A chair, some of which are staggered. In the chair according to claim 5.
A chair in which a part of the staggered holes is formed so that the diameter of the opening gradually decreases from the rear to the front. In the chair according to any one of claims 1 to 6.
The chair, wherein the plurality of holes are formed in the entire main surface of the plate-shaped portion. In the chair according to any one of claims 1 to 7.
The plurality of front holes are formed at positions on the front side of the plate-shaped portion in the front-rear direction with respect to the central portion, and the plurality of rear holes are located on the rear side of the central portion of the plate-shaped portion. The chair is formed in. In the chair according to claim 8.
The sum of the volumes of the plurality of rear holes is larger than the sum of the volumes of the plurality of front holes, the chair. In the chair according to any one of claims 1 to 9.
The plurality of holes are formed so that the volume gradually decreases from the rear to the front, the chair. In the chair according to any one of claims 1 to 10.
The chair, wherein the at least one slit is formed at a position rearward of the central portion in the front-rear direction of the plate-shaped portion. In the chair according to any one of claims 1 to 11.
A chair having a plate-shaped portion having a region in which at least one slit is not formed behind the plate-shaped portion and at a central position in the left-right direction of the plate-shaped portion.

Images