JP2018079086A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair capable of improving comfort to sit on.SOLUTION: A chair comprises a seat body on which a user can sit. At least a front edge part of the seat body is provided with a front edge that assumes at least either of a plate-like shape and a planar shape and the front end of which can be elastically deformed in a vertical direction. The femoral region placed on the front end is supported while being inhibited from being excessively pressed.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a chair including a seat that can be seated by a user.

  Conventionally, as shown in Patent Document 1, a chair is proposed in which a central portion of a seat on which a chair user sits is configured to be elastically deformable.

JP 2010-94192 A

  The configuration of Patent Document 1 improves the contact state between the periphery of the sciatic bone and the sitting body, and does not consider the contact between the thigh and the sitting body. Therefore, the sitting comfort may be deteriorated depending on the contact state between the thigh and the seat.

  The present disclosure proposes a chair capable of improving sitting comfort.

  One aspect of the present disclosure is a chair including a seat on which a user can sit, and at least one of a plate-like shape and a planar shape is provided on at least a front edge portion of the seat body. And it is a chair provided with the front edge part by which the front edge part was comprised so that elastic deformation was possible in the up-down direction.

  In a chair configured in this manner, the front edge elastically deforms up and down, so that when the thigh is placed on the front edge, the front edge suppresses excessive pressure on the thigh. However, the thigh can be supported. Therefore, the contact state between the thigh and the seat can be improved, and the sitting comfort of the entire seat can be improved.

  In the chair described above, one or more slits may be formed in the front edge portion. In the chair configured as described above, the flexibility of the front edge can be adjusted by the slit.

  In the chair described above, at least a part of the upper surface of the front edge portion may be covered with an elastomer. In the chair configured as described above, it is possible to reduce a sense of incongruity experienced when the human body directly contacts the front edge.

  Further, in the chair described above, the seat body is located behind the front edge portion, and provided with a displacement limiting portion in which the elastic deformation in the vertical direction is limited compared to the front edge portion, The front edge portion and the displacement limiting portion may be formed by a common member. In the chair configured as described above, when the user is seated, the wide range of the front portion of the seat body can be prevented from sinking as a whole.

  Moreover, the chair mentioned above WHEREIN: The width | variety of the left-right direction of the said front edge part may be comprised so that it may become smaller than the width | variety of the left-right direction in the said displacement restriction | limiting part. In the chair configured as described above, it is possible to suppress the elastic deformation of the rear portion of the front edge without largely inhibiting the elastic deformation of the front edge.

  Moreover, the chair mentioned above WHEREIN: The said front edge part may be comprised so that it may be a substantially rectangular shape which has length in the left-right direction when it sees from upper direction. In the chair configured in this way, the support surface that supports the thigh can be enlarged left and right.

  In the chair described above, the front edge portion may have a shape that is inclined so as to be positioned downward as it extends forward. In the chair configured in this manner, the load applied to the thigh becomes smaller toward the front, so that the sitting comfort can be improved.

FIG. 1A is a side view, FIG. 1B is a front view, FIG. 1C is a rear view, FIG. 1D is a plan view, and FIG. 1E is an IE of FIG. 1A. -IE sectional drawing. It is a perspective view which shows a seat and a framework. It is a perspective view which shows a seat and a framework. It is a perspective view which shows the state in which the seat body was attached to the framework. 5A is a plan view, FIG. 5B is a side view, FIG. 5C is a sectional view taken along the line VC-VC of FIG. 5A, and FIG. 5D is a bottom view showing only the backup resin. is there. 6A is a front view, FIG. 6B is a VIB-VIB sectional view of FIG. 5A, FIG. 6C is a VIC-VIC sectional view of FIG. 5A, and FIG. 6D is a screw member. It is sectional drawing by the same cross section as FIG. 6B of the state which fixed backup resin and the seat-plate receiving part by FIG. It is sectional drawing by the same cross section as FIG. 5C, Comprising: FIG. 7A thru | or FIG. 7C are sectional drawings which show the modification of the approach state of the elastomer to a slit. 8A and 8B are perspective views showing a modified example of the slit. It is sectional drawing by the same cross section as FIG. 5C, Comprising: It is sectional drawing which shows the modification of the thickness of a front edge part.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. Embodiment]
[1-1. overall structure]
As shown in FIG. 1, the chair 1 includes a seat body 11, a backrest 13, a support body 15, a leg end portion 17, and the like.

  In addition, in this embodiment, although the structure of each part may be described using directions such as front and rear, left and right, and up and down, those directions indicate the user when the user is normally seated on the chair 1. This is the standard direction. That is, the front direction of the seated user is the front.

The chair 1 is symmetrical to the left and right with reference to a plane extending in the front-rear and up-down directions.
[1-2. Support 15]
As shown in FIGS. 2 to 4, the support 15 includes a pair of left and right pipe bodies 31 formed by bending and welding a tubular metal pipe, a rod-shaped front side connecting portion 32 that connects the pipe bodies 31, and The rear connecting portion 33 and a seat plate receiving portion 34 attached between the pair of pipe bodies 31 are provided.

The pipe body 31 includes a front pillar 41, a rear pillar 42, a lower pillar 43, and an upper pillar 44.
The front pillar 41 is located at the front portion of the pipe body 31 and has a length in the vertical direction.
The rear pillar 42 is located at the rear part of the pipe body 31 and has a length in the vertical direction.

The lower column 43 is located at the lower part of the pipe body 31 and connects the lower end of the front column 41 and the lower end of the rear column 42. The lower pillar 43 is disposed along the floor surface on which the chair 1 is installed.
The upper column 44 is located at the upper part of the pipe body 31, and connects the upper end of the front column 41 and the upper side of the rear column 42 slightly above the vertical center. The front column 41 and the upper column 44 are bent and connected via a bent portion 46 formed by bending a metal pipe. The rear end portion of the upper column 44 is connected to the rear connecting portion 33 by welding. The upper column 44 has a thick portion 51 on the front side and a thin portion 52 on the rear side. Moreover, the upper pillar 44 is arrange | positioned along the right and left edge of the seat part 21 mentioned later.

  The thick part 51 has the same diameter as other parts in the pipe body 31. On the other hand, the thin portion 52 is formed with a concave portion 53 that is recessed downward on the upper surface, whereby the thickness is smaller than that of the thick portion 51.

The front connection portion 32 connects the front pillars 41 of the left and right pipe bodies 31 to each other. Further, the rear side connecting portion 33 connects the rear pillars 42 of the left and right pipe bodies 31 to each other.
The seat plate receiving portion 34 is a plate-like member that is bent around. The seat plate receiving portion 34 has a pair of left and right side portions 55 arranged along a pair of left and right upper pillars 44 and a front portion 56 that connects the front ends of the pair of side portions 55.

  The side portion 55 is welded to the upper column 44, whereby the seat plate receiving portion 34 is fixed to the upper column 44. As shown in FIG. 3, through-holes 57 are formed in each of the pair of left and right side portions 55 at three positions spaced in the front-rear direction. The through hole 57 is configured so that a male screw of a screw member 65 described later can be inserted.

The front portion 56 is located behind the bent portion 46.
[1-3. Seat 11]
The seat body 11 is configured so that a user can be seated, and includes a seat portion 21 and a backup resin 22 as shown in FIGS. 3 and 5A to 5C.

The seating portion 21 forms a seating surface 21a on the upper side, and is formed of an elastomer. An elastomer broadly refers to an elastic polymer material.
The seating portion 21 has a substantially rectangular plate shape as a whole, and the front portion has a curved surface that is gently bent downward.

  As shown in FIGS. 2, 4, 5 A and the like, the width of the seating portion 21 in the left-right direction is wide at the back and the front at the stepped portion 47 formed toward the front on both the left and right sides. It is narrowly formed. Hereinafter, a region behind the stepped portion 47 in the seating portion 21 is referred to as a wide portion 49. The stepped portion 47 is inclined so as to protrude forward as viewed from the left and right sides.

  As shown in FIG. 3 and FIG. 5D, the backup resin 22 is a substantially rectangular frame-shaped member, and includes a pair of horizontal frame portions 23 disposed along the left and right edges of the seat portion 21, and a seat portion. The rear frame portion 24 is disposed along the rear edge of the pair 21 and connects the rear ends of the pair of horizontal frame portions 23. The rear frame portion 24 is disposed along the front edge of the seat portion 21. And a front frame portion 25 that connects the front portions to each other.

  The front frame portion 25 is formed so as to extend left and right at the front end portion of the seat body 11. A front edge portion 61 is provided at the front portion of the front frame portion 25, that is, at the front edge portion of the seat body 11, so that the front end portion is configured to be elastically deformable in the vertical direction.

  A displacement limiting portion 62 is provided at a rear portion of the front frame portion 25, that is, at a position behind the front edge portion 61. That is, the front edge portion 61 and the displacement limiting portion 62 are formed of a common member. The displacement limiting portion 62 abuts on the front portion 56 and is supported from below by the front portion 56, so that the elastic deformation in the vertical direction is limited as compared with the front edge portion 61.

  The front edge portion 61 has a plate shape. Further, the front edge portion 61 is a substantially rectangular shape having a length in the left-right direction when viewed from above. Moreover, the front edge part 61 is a shape inclined so that it may be located below, so that it is ahead. A front portion of the seating portion 21 forms a curved surface along the front edge portion 61.

A plurality of slits 63 are formed in the front edge portion 61. Each of the plurality of slits 63 has a length in the front-rear direction, and is arranged side by side.
Since the outer peripheral shape of the backup resin 22 is formed in accordance with the outer peripheral shape of the seating portion 21, as shown in FIG. 5D, the auxiliary stepped portion in which a step is formed in the same manner as the stepped portion 47 of the seating portion 21. Around 64, the rear is wide and the front is narrow. Therefore, the width in the left-right direction of the front edge portion 61 is smaller than the width in the left-right direction at the rear portion of the displacement limiting portion 62.

  As described above, since the front portion 56 is located behind the bent portion 46, the displacement limiting portion 62 is located behind the bent portion 46. However, as shown in FIG. 4, the front edge portion 61 projects farther forward than the bent portion 46.

  An opening 27 is formed in the center of the backup resin 22. The center here means the central portion when the backup resin 22 is regarded as a frame, that is, the inside of the frame. The backup resin 22 is fixed to the seating portion 21 in a state where it is superimposed on the lower surface of the seating portion 21. The entire opening 27 is covered with the seating portion 21.

  The backup resin 22 is formed of a member having higher rigidity than the elastomer constituting the seat portion 21. As the backup resin 22, for example, an olefin resin such as polypropylene, a synthetic resin such as polyamide, a fiber reinforced plastic added with glass fiber or carbon fiber, or a material other than a resin such as metal or wood can be used. It is not limited to these.

  The seat part 21 and the backup resin 22 are integrally formed by two-color molding. Specifically, for example, the mold side is exchanged with one injection molding machine, and the seating portion 21 and the backup resin 22 are sequentially molded in sequence, or the molded backup resin 22 is placed in the mold. For example, a step of setting the seating portion 21 and setting the seating portion 21 can be considered. When a metal member other than a resin is used instead of the backup resin, it can be integrally formed by the latter process, so-called insert molding.

  As shown in FIG. 5A, the seating portion 21 completely covers the backup resin 22 when viewed from above. The entire upper surface of the front edge portion 61 is also covered with an elastomer. As shown in FIG. 5C, the elastomer has entered the slit 63.

  As shown in FIGS. 6B and 6C, the horizontal frame portion 23 is formed so as to be accommodated in an upwardly recessed groove portion 71 formed in the vicinity of the left and right edges of the seating portion 21. The groove portion 71 is bent at an end portion in the left-right direction of the seat portion 21 and extends downward, and an inner wall 73 that is a downward protrusion formed at a position spaced from the end portion. The horizontal frame portion 23 arranged inside the groove portion 71 has a positional relationship sandwiched from the left and right by the end wall 72 and the inner wall 73.

  The horizontal frame portion 23 is formed with a protruding portion 28 that protrudes downward. As shown in FIG. 6B, the screw hole 58 is formed in the protruding portion 28. The screw hole 58 is formed at a position corresponding to the through hole 57 in the side portion 55 of the seat plate receiving portion 34.

  Further, as shown in FIG. 6C, a groove 29 that is depressed downward is formed in a portion of the horizontal frame portion 23 where the screw hole 58 is not formed. A protrusion 75 provided on the seating portion 21 is inserted into the groove portion 29.

  As shown in FIG. 6D, the backup resin 22 and the side portion 55 are fixed by inserting the screw member 65 into the through hole 57 of the side portion 55 of the seat plate receiving portion 34 and fastening the screw member 58. It is realized with. When the backup resin 22 and the seat plate receiving portion 34 are fixed, the lower end of the protruding portion 28 abuts on the upper side surface of the side portion 55.

  In this state, as shown in FIGS. 1D and 4, the wide portion 49 of the seating portion 21 covers not only the backup resin 22 but also the thin portion 52 of the upper column 44 from above. In other words, in the range in which the wide portion 49 behind the step portion 47 is formed in the front-rear direction, the seat portion 21 covers the thin portion 52 and the side portion 55 from above and is seen from above in the entire region in the left-right direction. And the thin part 52 and the side part 55 cannot be visually recognized.

In the upper column 44, the thick portion 51 is disposed on the outer periphery of the seat body 11, and the seat portion 21 is disposed at a position not lined up in the thickness direction of the seat body 11.
[1-4. effect]
According to the embodiment detailed above, the following effects can be obtained.

  (1A) In the chair 1, since the front edge 61 elastically deforms up and down, when the thigh is put on the front edge 61, the front edge 61 presses the thigh excessively. The thigh can be supported while restrained. Therefore, by improving the contact state between the thigh and the seat body 11, the sitting comfort of the seat body 11 as a whole can be improved.

  (1B) In the chair 1, since the front edge part is covered with the seat part 21 containing the elastomer, the seat body 11 can suppress that a user contacts a front edge part directly. Therefore, it is possible to reduce the risk that the user touches the front edge and receives a sense of discomfort.

  (1C) In the chair 1, since the displacement limiting part 62 which is hard to elastically deform up and down is provided behind the front edge part, when the user sits down, the wide range of the front part of the seat body 11 is large. It can suppress that it sinks as a whole.

  (1D) In the chair 1, the front edge portion 61 is a rectangle having a length on the left and right when viewed from above, so that the thigh can be supported in a wide range on the left and right. Moreover, since the front edge part 61 is the shape inclined so that it might be located below as it is ahead, the load added to a thigh becomes small, and it can improve sitting comfort.

  (1E) In the chair 1, the width in the left-right direction of the front edge portion 61 is configured to be smaller than the width in the left-right direction in the rear portion of the displacement limiting portion 62, that is, the rear portion of the auxiliary stepped portion 64. Therefore, it is possible to suppress the elastic deformation of the displacement limiting portion 62 without significantly hindering the elastic deformation of the front edge portion 61.

[2. Other Embodiments]
Although the embodiment of the present disclosure has been described above, the present disclosure is not limited to the embodiment described above, and it is needless to say that various forms can be taken as long as they belong to the technical scope of the present disclosure.

  (2A) In the above embodiment, the configuration in which the front edge portion 61 is provided only in front of the seat body 11 is illustrated, but the front edge portion is not only in front of the seat body 11 but also on the left and right sides of the seat body 11. It may be provided.

  (2B) In the above-described embodiment, the displacement restricting portion 62 is supported from below by the front portion 56 of the seat plate receiving portion 34, so that the elastic deformation in the vertical direction is suppressed. However, the displacement limiter may be configured such that elastic deformation is suppressed by the structure of the displacement limiter itself. For example, it is conceivable to provide a structure such as a rib to improve the rigidity of the displacement limiting portion, or to increase the thickness in the vertical direction.

Further, the displacement limiting portion may be configured to be supported from below by a member other than the front portion 56.
(2C) In the above embodiment, the entire upper surface of the front edge portion 61 is illustrated as being covered with the elastomer of the seating portion 21. However, a part or all of the front edge portion 61 is not covered with the elastomer, and the upper surface is covered. The structure which is exposed may be sufficient.

(2D) In the above embodiment, the configuration in which the elastomer enters the slit 63 is illustrated, but a configuration in which the elastomer does not enter the slit 63 may be used.
On the other hand, the elastomer may be configured to pass through the slit and cover up to the lower surface of the front edge portion 61. For example, as shown in FIG. 7A, the slit 91 has an extended portion 92 whose width is widened on the lower surface, and a covering portion that covers the lower surface of the front edge portion 61 of the elastomer of the seating portion 21. 93 may be configured to cover at least a part of the periphery of the slit 91 from below by entering the expanded portion 92.

Further, as shown in FIG. 7B, the covering portion 94 may be configured to cover the lower surface of the front end portion of the front edge portion 61.
Further, as shown in FIG. 7C, the covering portion 95 may be configured to widely cover the lower surface of the front edge portion 61.

  (2E) In the above embodiment, a configuration in which a plurality of slits having a length in the front-rear direction is formed in the front edge portion 61 is exemplified. However, the structure in which the slit is not formed may be sufficient, and the number of the slit formed may be one.

  Further, as shown in FIG. 8A, a configuration in which a through hole 101 such as a long hole or a round hole is formed instead of the slit may be used. In that case, holes having different shapes may be formed. Further, as shown in FIG. 8B, a slit 111 having a length in the left-right direction may be formed. In that case, slits having different widths and lengths may be formed.

  The through holes 101 and the slits 111 may be formed side by side so as to form a row in the front-rear direction, or part or all of them are formed while changing the position in the left-right direction so as not to form a row in the front-rear direction. May be. Further, the diameter of the through hole and the width and length of the slit may be formed so as to decrease toward the front side, or conversely, may be formed so as to decrease toward the rear side.

  Further, the front edge portion 61 may be provided with a hole or groove that does not penetrate instead of the above-described through hole or slit. Further, a member such as a rib that reduces the amount of elastic deformation may be provided.

  (2F) In the above embodiment, the configuration in which the thickness in the vertical direction of the front edge portion 61 is constant is exemplified. However, as in the front edge portion 61a shown in FIG. It may be configured to change in accordance with. For example, the front flexibility can be increased by forming the film thinner toward the front. On the contrary, it may be formed thinner toward the rear.

  (2G) In the above-described embodiment, the seat body 11 is exemplified by the configuration including the seat portion 21 and the backup resin 22. However, for example, you may have a cushioning material provided with polyurethane foam etc., for example.

  (2H) In the above embodiment, the front edge portion 61 is exemplified as a curved plate-like shape. However, the front edge portion may have a flat plate shape. Further, the front edge portion may have a planar shape. The term “planar” as used herein means a state in which a portion of the front edge portion that supports the thigh, that is, an upper portion, is spread out like a surface. For example, it is composed of rod-shaped members, wires, cloths, meshes, aggregates, etc., and the front edge itself is not plate-like, but the part that contacts the thigh and supports the thigh is flat Or the thing spreading in a curved surface.

  More specifically, rod-like members assembled in a lattice shape, grid shape, net shape, or the like, a wire or cloth stretched between support members arranged with a space between left and right, This corresponds to a block in which a certain shape such as a rectangular parallelepiped is two-dimensionally arranged and fixed.

DESCRIPTION OF SYMBOLS 1 ... Chair, 11 ... Seating body, 15 ... Support body, 17 ... Leg end part, 21 ... Seating part, 21a ... Seating surface, 22 ... Backup resin, 23 ... Horizontal frame part, 24 ... Rear frame part, 25 ... Front Frame part, 27 ... Opening, 28 ... Projection part, 29 ... Groove part, 31 ... Pipe body, 32 ... Front side connection part, 33 ... Rear side connection part, 34 ... Seat plate receiving part, 41 ... Front pillar, 42 ... Rear pillar , 43 ... lower pillar, 44 ... upper pillar, 46 ... bent part, 47 ... step part, 49 ... wide part, 51 ... thick part, 52 ... thin part, 53 ... concave part, 55 ... side part, 56 ... forward , 57... Through hole, 58. Screw hole, 61. Front edge portion, 61 a... Front edge portion, 62 ... Displacement limiting portion, 63... Slit, 64 ... Auxiliary step portion, 65 ... Screw member, 71. ... end wall, 73 ... inner wall, 75 ... protrusion, 91 ... slit, 92 ... expansion part, 93 ... covering part, 94 ... covering part, 95 ... covering part, 10 ... through hole, 111 ... slit.

Claims (7)

A chair having a seat on which a user can sit;
At least the front edge portion of the seat body is at least one of a plate-like shape and a planar shape, and the front edge portion is configured to be elastically deformable in the vertical direction. There are chairs. The chair according to claim 1,
A chair having one or more slits formed in the front edge. The chair according to claim 1 or 2,
The front edge is a chair in which at least a part of the upper surface is covered with an elastomer. The chair according to any one of claims 1 to 3,
The seat body is located behind the front edge portion, and is provided with a displacement limiting portion in which elastic deformation in the vertical direction is limited compared to the front edge portion,
The front edge part and the displacement limiting part are chairs formed of a common member. The chair according to claim 4,
A width of the front edge portion in the left-right direction is smaller than a width in the left-right direction of the displacement limiting portion. The chair according to any one of claims 1 to 5,
The said front edge part is a chair which is a substantially rectangular shape which has length in the left-right direction when it sees from upper direction. The chair according to any one of claims 1 to 6,
The said front edge part is a chair which is a shape which inclined so that it might be located below as it is ahead.