JP7715561B2 - chair - Google Patents

Description

The present invention relates to a chair.

For example, Patent Document 1 discloses a chair comprising a seat, a table support positioned above the seat, a table positioned above the table support, and a connecting portion that rotatably connects the table to the table support. This configuration allows the table to rotate between an in-use state in which it is positioned in front of a user seated on the seat, and an open state in which it rotates around the axis of the table support, opening the seating space of the seat to the front.

JP 2019-58531 A

However, in the configuration disclosed in Patent Document 1, a portion of the table protrudes forward from the seat in a plan view, whether in use or open. This can cause interference with the surrounding area, such as obstructing passage around the chair. Furthermore, because the table is located in front of the user sitting on the seat, whether in use or open, it can also obstruct the user's access to the seat.
An object of the present invention is to provide a chair that can reduce interference with the surrounding area and increase the user's accessibility to the seating surface.

In order to achieve the above-mentioned object, one aspect of the present invention provides a chair comprising: a base member placed on the floor, the base member having a seating surface facing upward and an upward-facing surface formed to the side of the seating surface; a table top having an upward-facing top surface, positioned above the base member at a distance; and a support member extending upward from the upward-facing surface and supporting the table top so that it can rotate about an axis along the vertical direction. The table top is movable about the axis between a first state in which at least a portion of the table top overlaps the upward-facing surface in a plan view and the entire table top overlaps the base member in a plan view, and a second state in which the table top is positioned closer to the seating surface than in the first state.

In this way, in the first state, the entire table top overlaps the base member in a plan view, so the table top does not protrude outward from the base member and interference with the surrounding area is avoided. Also, in the first state, at least a portion of the table top overlaps the upward surface in a plan view and is positioned to the side of the seating surface. This increases the user's access to the seating surface. Also, in the first state, the user can place items such as personal belongings on the top surface of the table top. In this case, because the table top is positioned to the side of the seating surface, items placed on the top surface do not interfere with the user seated on the seating surface.
In the second state, at least a portion of the table top is positioned closer to the seating surface than in the first state, so it overlaps the seating surface in a plan view. This means that at least a portion of the table top is positioned in front of the user seated on the seating surface. Therefore, in the second state, the user can easily perform various tasks on the top surface of the table top.

In the chair according to one aspect of the present invention, at least a portion of the table top may protrude forward beyond the base member in the second state.
With this configuration, in the second state, at least a portion of the table top protrudes forward beyond the base member, ensuring a wide front-to-rear distance between the table top and a user seated on the seating surface. This reduces interference between the user and the table top, ensuring an appropriate positional relationship between the user and the table top. Furthermore, by having at least a portion of the table top protrude forward, a wide top surface of the table top can be secured, improving the user's workability on the top surface.

In a chair according to one aspect of the present invention, the table top may have linear top side portions that extend along the side edges of the base member in the first state.
According to this configuration, in the first state, the side portions of the table top are aligned along the side edges of the base member, thereby preventing the table top from protruding sideways.

In a chair according to one aspect of the present invention, the table top may be arranged in the second state so as to be inclined forward in the width direction of the base member toward the seating surface.
With this configuration, in the second state, the table top tilts forward in the width direction toward the seating surface. In other words, the table top extends diagonally forward as seen by a user seated on the seating surface, improving the user's access to the seating surface even in the second state.

The chair according to one aspect of the present invention may further include a restricting mechanism that restricts the range of rotation of the table top around the support member.
According to this configuration, by providing a restricting mechanism that restricts the rotation range of the table top, it is possible to prevent the table top from rotating excessively and interfering with objects or people around the chair.

In a chair according to one aspect of the present invention, a panel member that rises upward is provided at least to the side of the base member, and the regulating member may be configured to regulate the rotation of the table top from the first state toward the panel member.
According to this configuration, by providing the panel members at least on the sides of the base member, the user sitting on the seating surface is blocked from the view of those around, thereby increasing the user's privacy. In addition, the restricting member restricts the table top from rotating from the first position toward the panel member, thereby reducing interference between the table top and the panel member.

In a chair according to one aspect of the present invention, the base member may include a plate-shaped member having an upward surface on the side of the seating surface, and in the first state, the table top may be positioned above the plate-shaped member.
According to this configuration, the seating surface and the upward surface can be clearly separated by providing plate-like members on the sides of the seating surface, which prevents a user sitting on the seating surface from interfering with the table top in the first position.
In addition, a space is formed between the table top and the plate-like member, which are positioned above and below each other in the first state, and an item placed on the upward surface can be stored in the space between the plate-like member and the table top.

In a chair according to one aspect of the present invention, the table top may be long in the front-to-rear direction of the base member and short in the width direction of the base member in the first state.
According to this configuration, the table top is long in the front-to-back direction of the base member and short in the width direction of the base member in the first state, so that in the first state the table top can be efficiently stored within the range where it overlaps with the base member.
In addition, in the second state, the table top is long in the width direction of the base member, so that the work space on the top surface can be efficiently secured.

In one aspect of the chair of the present invention, the chair may further include a backrest at a portion of the width of the base member, the backrest rising upward from the base member and having a backrest surface facing forward, and the seating surface may be formed to include the front of the backrest.
With this configuration, the backrest allows the user to rest part of their weight on the backrest, making it easy to assume a stable posture. The backrest also makes it easy to guide the user's seating position on the seating surface to a position forward of the backrest. Therefore, the user's seating position relative to the table top can be guided to an appropriate position relative to the table top.

In one aspect of the chair of the present invention, the backrest may be positioned closer to the seating surface in the width direction than the table top in the first state, and may be positioned so as to overlap at least a portion of the table top in the width direction in the second state.
With this configuration, the backrest is positioned closer to the seating surface in the width direction than the table top in the first state, thereby reducing interference between the table top and a user sitting on the seating surface in front of the backrest. Also, the backrest is positioned so as to overlap at least a portion of the table top in the width direction in the second state, so that at least a portion of the table top is positioned in front of a user sitting on the seating surface in front of the backrest. This improves workability when a user works on the top surface of the table top.

One aspect of the present invention reduces interference with the surrounding area and improves the user's access to the seating surface.

1 is a perspective view showing the overall configuration of a chair according to an embodiment of the present invention. FIG. 2 is a perspective view showing the chair body of the chair. FIG. FIG. 5 is a diagram showing the configuration of the base of the chair body, and is a cross-sectional view taken along the line A-A in FIG. 4. FIG. 10 is a perspective view showing a second support surface and a step portion provided on the base portion. 3 is a perspective view showing a support member and a restricting mechanism provided on the chair body. FIG. 10 is a diagram showing a state in which the table top of the chair body rotates. FIG. FIG. 4 is a plan view of the table top in a second state. FIG. 10 is a plan view of the table top in a third state. FIG. 10 is a plan view showing a modified example of the chair. FIG. 10 is a plan view showing another modified example of the chair. FIG. 10 is a plan view showing yet another modified example of the chair.

Below, an embodiment of a chair according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to this embodiment.

Fig. 1 is a perspective view showing the overall configuration of a chair 1 according to an embodiment of the present invention. Fig. 2 is a perspective view showing a chair body 2 of the chair 1. Fig. 3 is a front view of the chair body 2. Fig. 4 is a plan view of the chair body 2.
As shown in FIG. 1 , the chair 1 includes a chair body 2 and a panel member 9 .
As shown in FIGS. 2 to 4, the chair body 2 mainly includes a base member 3, a support member 5, a table top 6, a backrest 7, and a wiring connection portion 8.

The base member 3 is placed on the floor surface F. The base member 3 has a seating surface 101 facing upward and an upward-facing surface 102 formed on the side of the seating surface 101. In this embodiment, the base member 3 is rectangular in plan view, and the seating surface 101 and the upward-facing surface 102 are aligned along the long side of the base member 3. In the following description, the long side of the base member 3 along which the seating surface 101 and the upward-facing surface 102 are aligned is referred to as the width direction Dw, and the direction perpendicular to the width direction Dw in the horizontal plane is referred to as the front-to-rear direction Dfr. The shape of the base member 3 in plan view may be circular, elliptical, polygonal, or the like.

The base member 3 includes a support structure 30, a seating member 40, and a plate-like member 45. As shown in Figures 2 and 3, the support structure 30 is installed on the floor surface F. The support structure 30 includes a base 31 and support legs 32.

FIG. 5 is a diagram showing the configuration of the base portion 31 of the chair body 2, and is a cross-sectional view taken along the line A-A in FIG.
The base 31 has a generally rectangular box shape overall and is formed of, for example, a panel material made of wood-based material. As shown in FIG. 5 , the base 31 includes a bottom plate 33, side plates 34, and an upper plate 35. The bottom plate 33 is disposed above the floor surface F at a distance. The bottom plate 33 is provided along a horizontal plane intersecting the up-down direction Dv. The bottom plate 33 has a rectangular shape in a plan view. The side plates 34 are provided along the four sides of the bottom plate 33. The side plates 34 rise upward from each of the four sides of the bottom plate 33. The upper plate 35 is provided on the side plates 34. The upper plate 35 is disposed above the bottom plate 33 at a distance. The upper plate 35 is provided along the horizontal plane and forms an upward-facing base upper surface 31t.

The support legs 32 extend downward from the base 31. The support legs 32 are provided, for example, at the four corners of the base 31. The support legs 32 stand on the floor surface F, so that the base 31 is supported above the floor surface F. The lower ends of the support legs 32 may be provided with adjusters for adjusting the height and caster rollers that can roll on the floor surface F (neither of which are shown).

The support structure 30 includes a first support portion 36 , a second support portion 37 , and a partition wall 38 .
The first support portion 36 is provided on one side in the width direction Dw of the upper plate 35 of the base 31. The first support portion 36 is formed on a part of the upper plate 35. The first support portion 36 has a first support surface 36f. The first support surface 36f is formed by a part of the base upper surface 31t and faces upward. The first support surface 36f supports the seating member 40 from below.

The second support portion 37 is provided on the upper plate 35 of the base 31, adjacent to the first support portion 36 on the other side in the width direction Dw (one side in the horizontal direction). The second support portion 37 has a second support surface 37f located below the seating surface 101. The second support surface 37f is formed by the upper surface of the plate body 37d. In a portion surrounding the outer periphery of the second support surface 37f, the side plate 34 extends above the base upper surface 31t. The plate body 37d is supported from below by the upper end of a bulkhead member 37k that rises upward from the base upper surface 31t and the upper end of the side plate 34. As a result, the plate body 37d is positioned above the base upper surface 31t. The second support surface 37f is formed by the upper surface of the plate body 37d. The second support surface 37 f (plate 37 d) is provided at a position in the width direction Dw different from the portion of the base upper surface 31 t that constitutes the first support surface 36 f. In this way, the first support surface 36 f is located lower than the second support surface 37 f.

The seating member 40 is placed on the first support surface 36f. The seating member 40 is arranged to cover the entire first support surface 36f. The seating member 40 has a predetermined thickness in the vertical direction Dv. The upper surface of the seating member 40 is located higher in the vertical direction Dv than the second support surface 37f. The seating member 40 is made of a material such as sponge and is elastically deformable. As shown in Figure 2, the front end 40a of the seating member 40 is curved diagonally downward toward the front.

5, the partition wall 38 is provided between the first support portion 36 and the second support portion 37 in the width direction Dw. The partition wall 38 protrudes upward beyond the first support surface 36 f and the second support surface 37 f. The upper end of the partition wall 38 is provided at substantially the same height as the upper surface of the seating member 40. An end portion 40 s of the seating member 40 on the second support portion 37 side abuts against the partition wall 38.
FIG. 6 is a perspective view showing the second support surface 37f and the step portion D provided on the base portion 31. As shown in FIG.
At least the upper surface of the seating member 40 and the partition wall 38 are covered with a cover material 39 made of cloth, vinyl, or the like. In this embodiment, the cover material 39 integrally covers not only the upper surface of the seating member and the partition wall 38 but also the entire side surface of the base 31. As a result, as shown in FIGS. 5 and 6 , a step D covered by the cover material 39 together with the seating member 40 is provided on the second support surface 37f side of the first support surface 36f. The seating surface 101 is formed by covering the upper surface of the seating member 40 with the cover material 39. An edge 39e of the cover material 39 is located on the second support surface 37f and is covered by a plate-like member 45 (see FIG. 7 ).

As shown in Figures 3 and 5, the plate-shaped member 45 is placed on the second support surface 37f. The plate-shaped member 45 is provided to the side of the seating member 40. The plate-shaped member 45 is provided along a horizontal plane, and its upper surface forms the upward surface 102. The upward surface 102 and the seating surface 101 are provided at substantially the same height and are connected in the width direction Dw. The upward surface 102 and the seating surface 101 may have different heights in the vertical direction Dv, but it is preferable that the difference in height between the upward surface 102 and the seating surface 101 be within, for example, 10 cm.

The plate-shaped member 45 is formed from a different material from the seating member 40 and the covering material 39. The plate-shaped member 45 uses the upward surface 102 as an item placement surface and is formed from a material harder than the seating member 40 that constitutes the seating surface 101, such as a wood-based material, resin-based material, or metal material. Additionally, in this embodiment, the plate-shaped member 45 functions as the opening surface for the wiring connection portion 8, so it is preferable to use an insulating material among the above materials. The plate-shaped member 45 covers the entire second support surface 37f. Note that in this embodiment, "plate-shaped" refers to a shape in which the minimum dimension in the width direction Dw and the minimum dimension in the front-to-rear direction Dfr are greater than the maximum dimension in the up-down direction Dv. Therefore, the upward surface 102 of the plate-shaped member 45 is not limited to being flat, but may have a stepped surface or a curved surface. Furthermore, the upward surface 102 is not limited to being flush with the seating surface 101.

As shown in FIG. 3 , the support member 5 extends upward from the upward surface 102. The support member 5 supports the table top 6, which will be described later. The support member 5 supports the table top 6 so that it can rotate about an axis along the up-down direction Dv. The support member 5 is disposed within the range of the base member 3 in a plan view. In other words, the support member 5 does not protrude outward in the horizontal direction beyond the base member 3. The support member 5 is disposed on the upward surface 102. In this embodiment, the support member 5 is disposed, for example, at the front end of the plate-shaped member 45 that forms the upward surface 102. The support member 5 is disposed, for example, at the center of the plate-shaped member 45 in the width direction Dw.

The support member 5 penetrates the plate-shaped member 45 in the vertical direction Dv and extends to the lower side of the plate-shaped member 45. A lower plate 51 is provided at the lower end of the support member 5. The lower plate 51 is fixed to the underside of the plate-shaped member 45 with bolts (not shown) or the like. Because the plate-shaped member 45 is made of a hard material, the lower plate 51 and support member 5 are firmly supported by the plate-shaped member 45.

FIG. 7 is a perspective view showing the support member 5 and the restricting mechanism 55 provided on the chair body 2. As shown in FIG.
7 , a stopper member 56 that constitutes a restriction mechanism 55 (described later) is provided at the upper end of the support member 5. The stopper member 56 has an outer diameter larger than that of the upper end of the support member 5. The stopper member 56 is, for example, teardrop-shaped in plan view, and has a protrusion 56t that protrudes radially outward from a portion of the circumference around the axis of the support member 5.

As shown in Figures 2 and 3, the table top 6 is disposed above the base member 3 with a gap therebetween. The table top 6 is provided along a horizontal plane. The table top 6 has a top surface 6f facing upward. The table top 6 is supported by a support member 5. The support member 5 supports one end 6a of the table top 6. In this embodiment, the table top 6 has a rectangular shape in a plan view. The support member 5 supports one end 6a of the table top 6 on one side in the long side direction.

As shown in Figure 3, a table side plate 61 is fixed to the underside of the table top 6. As shown in Figures 3 and 6, a cylindrical portion 61s extending downward is integrally formed on the table side plate 61. The upper end of the support member 5 is inserted from below into the inside of the cylindrical portion 61s. A slight radial clearance is provided between the inner peripheral surface of the cylindrical portion 61s and the outer peripheral surface of the upper end of the support member 5. The lower end of the cylindrical portion 61s is supported on a stopper ring 53 (see Figure 7) provided on the outer peripheral surface of the support member 5. As a result, the table top 6 is supported on the upper end of the support member 5 so as to be rotatable around an axis extending in the vertical direction Dv.

Fig. 8 is a view showing a state in which the table top 6 of the chair body 2 is rotated. Fig. 9 is a plan view of the table top 6 in the second position P2.
As shown in FIGS. 4, 8 and 9, the table top 6 can be displaced between a first state P1 and a second state P2 by rotating around the axis of the support member 5.
As shown in Figures 4 and 8, in the first state P1, the entire table top 6 overlaps the base member 3 in a plan view. In the first state P1, at least a portion of the table top 6 overlaps the upward surface 102 in a plan view. In the first state P1, the table top 6 is located to the side of the seating surface 101. In the first state P1, the table top 6 is located vertically above the plate-like member 45 that forms the upward surface 102. In this state, as shown in Figures 2 and 3, a space S is formed between the plate-like member 45 and the table top 6 located above it, in which items placed on the upward surface 102 can be stored.

As shown in FIG. 4 , in the first state P1, the rectangular table top 6 in a plan view is positioned with its long side aligned along the front-to-back direction Dfr. In other words, in the first state P1, the table top 6 is long in the front-to-back direction Dfr of the base member 3 and short in the width direction Dw of the base member 3. In the first state P1, the linear side portion 6s of the table top 6 along the long side is aligned along and parallel to the side plate 34 that forms the side edge of the base member 3. In the first state P1, the other end 6b of the table top 6, opposite the one end 6a supported by the support member 5, is located behind the center of the plate-shaped member 45 (upward surface 102) in the front-to-back direction Dfr and forward of the rear end 45r of the plate-shaped member 45. In the first state P1, the other end 6b of the table top 6 overlaps the backrest 7 in the front-to-back direction as viewed in the width direction Dw. In the first state P1, the opposite side portion 6p of the table top 6, which is located opposite the top side portion 6s in the short side direction, is located closer to the seating surface 101 than the boundary between the seating surface 101 and the upward surface 102, and closer to the upward surface 102 than the backrest 7. In other words, the table top 6 straddles the boundary at least in a portion that is closer to the opposite side portion 6p than the center portion in the short side direction (the connecting portion of the cylindrical portion 61s). However, in the first state P1, the entire table top 6 may overlap the upward surface 102 in a plan view.

As shown in FIG. 9 , in the second state P2, at least a portion of the table top 6 is positioned closer to the seating surface 101 than in the first state P1. In the second state P2, at least a portion of the table top 6 overlaps the seating surface 101 in a plan view. In the second state P2, the table top 6 is tilted forward toward the seating surface 101 in the width direction Dw of the base member 3. In the second state P2, at least a portion of the table top 6 protrudes forward from the base member 3. In the illustrated example, in the second state P2, the entire opposite side portion 6p protrudes forward from the base member 3, and the table top side portion 6s does not protrude from the base member 3. In this state, the table top 6 is positioned forward or diagonally forward from the perspective of a user seated on the seating surface 101. Note that this embodiment does not limit the angle (position) of the table top 6 around its axis in the second state P2. The angle (position) of the table top 6 around its axis can be set arbitrarily according to the user's preference.

FIG. 10 is a plan view of the table top 6 in the third state P3.
8 and 10, in this embodiment, the table top 6 can also be in a third state P3. In the third state P3, the table top 6 has a larger rotation angle from the first state P1 than in the second state P2. In the illustrated example, in the third state P3, not only the entire opposite side portion 6p but also a portion of the table top side portion 6s protrudes forward from the base member 3.

7, the upper end of the support member 5 extends upward through the table side plate 61. The stopper member 56 is disposed above the table side plate 61.
The upper surface of the table side plate 61 is provided with protrusions 63 and 64 that protrude upward. The protrusions 63 and 64 constitute a regulating mechanism 55. The underside of the table top 6 is formed with a counterbore 66 that is recessed upward to accommodate the stopper member 56 and the protrusions 63 and 64. In the regulating mechanism 55 equipped with the stopper member 56 and the protrusions 63 and 64, when the table side plate 61 rotates integrally with the table top 6 around the axis of the support member 5, one of the protrusions 63 or 64 abuts against the convex portion 56t of the stopper member 56, thereby regulating the rotation range of the table top 6. In this embodiment, the regulating mechanism 55 regulates the rotation range of the table top 6 between a first position P1 and a third position P3.
The table top 6 may be configured to rotate only between the first state P1 and the second state P2. In this case, the restricting mechanism 55 restricts the rotation range of the table top 6 between the first state P1 and the second state P2.

As shown in Figures 2 and 4, the backrest 7 is provided at the rear end of the base member 3. The backrest 7 extends upward from the seating member 40. The backrest 7 has a backrest surface 7f facing forward. The backrest 7 is provided on part of the base 31 in the width direction Dw. The backrest 7 is provided on part of the seating member 40 in the width direction Dw. The seating surface 101 is formed to include the front of the backrest 7. To lean against the backrest 7, the user selects their own position in the width direction Dw based on the backrest 7. As a result, the backrest 7 has the function of guiding the user's sitting position on the seating surface 101 to the area in front of the backrest 7.

The backrest 7 is positioned closer to the seating surface 101 in the width direction Dw than the table top 6 in the first state P1. This prevents a user seated in front of the backrest 7 on the seating surface 101 from interfering with the table top 6 in the first state P1.

Furthermore, as shown in FIG. 10, the backrest 7 is positioned so as to overlap at least a portion of the table top 6 in the width direction Dw in the second state P2. As a result, the table top 6 is positioned forward or diagonally forward when viewed from a user seated in front of the backrest 7 on the seating surface 101, making it easier to perform work on the top surface 6f. In the illustrated example, the area of the table top 6 on the other end 6b side of the center of the top side portion 6s overlaps the backrest 7 in the width direction Dw.

As shown in FIG. 7 , the wiring connection portion 8 is provided on the upward surface 102. The wiring connection portion 8 is provided on the plate-shaped member 45. The wiring connection portion 8 is housed in a recess 48 formed in the second support portion 37 of the base 31. The wiring connection portion 8 has a connection port 8a that opens upward. The connection port 8a penetrates the plate-shaped member 45 and is exposed on the upper surface of the plate-shaped member 45. A user can connect wiring for electronic devices, etc. to be placed on the table top 6 to the connection port 8a. Wiring that can be connected to the connection port 8a includes power supply wiring, communication signal lines, wiring connected to various connectors, etc.

As shown in FIG. 4, the wiring connection portion 8 is positioned so as to overlap the table top 6 in the first state P1 in a plan view. Therefore, in the first state P1, the wiring connection portion 8 is covered from above by the table top 6. This prevents the liquid from dripping directly onto the wiring connection portion 8 if a user spills a beverage or other liquid placed on the table top 6f in the first state P1. Also, as shown in FIG. 9, the wiring connection portion 8 is positioned to the side of the table top 6 in the second state P2 in a plan view. Therefore, in the second state P2, the wiring connection portion 8 is not covered from above by the table top 6, and is exposed upward. This allows wiring connected to electronic devices placed on the table top 6f to be easily inserted into and removed from the wiring connection portion 8.

In this embodiment, the wiring connection portion 8 is located on the end of the upward surface 102 (plate-shaped member 45) away from the seating surface 101 in the width direction Dw. This allows for a wide space on the upward surface 102 to be secured between the wiring connection portion 8 and the seating surface 101 and used effectively. Furthermore, because the wiring is connected to the wiring connection portion 8 at the end of the upward surface 102, the wiring is less likely to get in the way of a user sitting on the seating surface 101.

As shown in Figure 2, the chair body 2 described above may be configured such that the support structure 30, wiring connection portion 8, seating member 40, covering material 39, and backrest 7 form a chair unit 201, and the plate-like member 45, support member 5, and table top 6 form a table unit 202. When assembling the chair body 2, the chair unit 201 and table unit 202 can be assembled separately, and then the table unit 202 can be attached to the chair unit 201, thereby making the assembly process more efficient.

As shown in FIG. 1, the panel member 9 includes a back plate portion 91 located behind the base member 3 and side plate portions 92 located on both sides of the base member 3. The panel member 9 is fixed to the base portion 31 of the base member 3 by mounting brackets or the like (not shown). The back plate portion 91 and the side plate portions 92 rise upward from the base member 3. The panel member 9 is arranged to surround the space above the top surface 3t of the base member 3 from the rear and both sides.

In this way, in this embodiment, the table top 6 is configured to be displaceable around an axis between a first state P1 in which the entire table top 6 overlaps the base member 3 in a planar view, and a second state P2 in which at least a portion of the table top 6 is positioned closer to the seating surface 101 than the first state P1.
With this configuration, in the first state P1, the entire table top 6 overlaps the base member 3 in a plan view, so the table top 6 does not protrude outward from the base member 3 and interference with the surrounding area is avoided. Also, in the first state P1, the table top 6 is located to the side of the seating surface 101, improving the user's access to the seating surface 101. Also, in the first state P1, the user can place items such as personal belongings on the top surface 6f of the table top 6. In this case, because the table top 6 is located to the side of the seating surface 101, items placed on the top surface 6f are less likely to get in the way of the user.
In the second state P2, at least a portion of the table top 6 is located closer to the seating surface 101 than in the first state P1, so that at least a portion of the table top 6 is located in front of or diagonally in front of the user seated on the seating surface 101. Therefore, in the second state P2, the user can easily perform various tasks on the top surface 6f of the table top 6.
As a result, it is possible to provide a chair 1 that can reduce interference with the surrounding area and increase the user's accessibility to the seating surface.

In this embodiment, in the second state P2, at least a part of the table top 6 protrudes forward beyond the base member 3.
With this configuration, a wide distance can be secured in the front-to-rear direction Dfr between the user seated on the seating surface 101 and the table top 6. This reduces interference between the user and the table top 6, and ensures an appropriate positional relationship between the user and the table top 6. Furthermore, by protruding at least a portion of the table top 6 forward, a wide top surface 6f of the table top 6 can be secured, improving the user's workability on the top surface 6f.

In this embodiment, in the first state P1, the table top side portion 6s of the table top 6 is configured to follow the side edge of the base member 3.
With this configuration, the table top 6 can be prevented from protruding sideways.

In this embodiment, in the second state P2, the table top 6 is configured to be inclined forward in the width direction Dw toward the seating surface 101 side.
With this configuration, the table top 6 extends diagonally forward as seen by the user, so that the user's accessibility to the seating surface 101 can be improved even in the second state P2.

In this embodiment, a restricting mechanism 55 is provided to restrict the rotation range of the table top 6.
This configuration can prevent the table top 6 from rotating excessively and protruding around the chair 1, interfering with objects or people.

In this embodiment, the panel member 9 is provided, and the restricting member 55 is configured to restrict the rotation of the table top 6 from the first state P1 toward the panel member 9 side.
With this configuration, the panel member 9 blocks the view of the user seated on the seating surface 101 from those around, thereby enhancing the user's privacy. In addition, the restricting member 55 restricts the table top 6 from rotating from the first position P1 toward the side plate portion 92 of the panel member 9, thereby reducing interference between the table top 6 and the panel member 9.

In this embodiment, a plate-like member 45 that forms the upward surface 102 is provided on the side of the seating surface 101 .
With this configuration, the seating surface 101 and the upward surface 102 can be clearly separated. This prevents a user seated on the seating surface 101 from interfering with the table top 6 in the first state P1.
Furthermore, a space is formed between the table top 6 and the plate-like member 45 , and an item placed on the upward surface 102 can be stored in the space between the plate-like member 45 and the table top 6 .

In this embodiment, the table top 6 is configured to be long in the front-rear direction Dfr of the base member 3 and short in the width direction Dw of the base member 3 in the first state P1.
With this configuration, in the first state P1, the table top 6 can be efficiently stored within the range where it overlaps with the base member 3.
In addition, in the second state P2, the table top 6 is long in the width direction Dw of the base member 3, so that the work space on the top surface 6f can be efficiently secured.

In this embodiment, a backrest 7 is provided.
With this configuration, the user can rest part of their weight on the backrest 7, making it easy to assume a stable posture. In addition, the backrest 7 can easily guide the user's seating position on the seating surface 101 to a position in front of the backrest 7. Therefore, the user can be guided to an appropriate position relative to the table top 6.

In this embodiment, the backrest 7 is configured to be disposed closer to the seating surface 101 in the width direction Dw than the table top 6 in the first state P1.
This configuration reduces interference between a user seated in front of the backrest 7 on the seating surface 101 and the table top 6. Furthermore, by arranging the backrest 7 so that it overlaps with at least a portion of the table top 6 in the width direction Dw in the second state P2, at least a portion of the table top 6 is positioned in front of a user seated in front of the backrest 7 on the seating surface 101. This improves workability when a user works on the top surface 6f of the table top 6.

(Other embodiments)
Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments. Addition, omission, substitution, and other modifications of the configuration are possible without departing from the spirit of the present invention. The present invention is not limited by the above description, but is limited only by the appended claims.

For example, in the above-described embodiment, the seating surface 101 and the upward surface 102 are formed from different materials, but this is not limited to this. The seating surface 101 and the upward surface 102 can also be formed from the same material.

In the above-described embodiment, the table top 6 has a rectangular shape in plan view, but is not limited to this. The planar shape of the table top 6 can be changed as appropriate.
In the above embodiment, the support member 5 is disposed at the front end of the plate-shaped member 45, in the center of the plate-shaped member 45 in the width direction Dw, but this is not limitative. The position of the support member 5 can be changed as appropriate.
For example, as shown in Fig. 11, the table top 6B may have a trapezoidal shape in a plan view. In the first state P1, the side edge 6t of the table top 6B, which is located on the side away from the seating surface 101 in the width direction Dw, is inclined from one end 6a to the other end 6b. As a result, when the table top 6B is rotated to the second state P2 (the state indicated by the two-dot chain line in Fig. 11), the side edge 6t is inclined forward in the width direction Dw toward the seating surface 101. This improves the user's access to the seating surface 101 in the second state P2.
In the modification shown in FIG. 11, the support member 5B is disposed at the front end of the plate-shaped member 45, at the end of the plate-shaped member 45 in the width direction Dw.

12, the table top 6C may be provided with a recess 68 recessed forward in the portion facing the user in the second state P2. This ensures a large working space on the top surface 6f while preventing the user from feeling pressured by the table top 6C.
In addition to this, the table top 6 may have various shapes, for example, a circle, an oval, a polygon such as a triangle, or the like.

Also, as shown in FIG. 13, the support member 5C may be arranged at the rear end of the upward surface 102, at the end of the upward surface 102 on the seating surface 101 side in the width direction Dw. In this case, the support member 5 supports the other end 6b of the table top 6C located rearward in the first state P1.

In the above-described embodiment, the backrest 7 is arranged closer to the seating surface 101 in the width direction Dw than the table top 6 in the first state P1, but this is not limitative.
13, a portion of the backrest 7C may overlap the table top 6C in the width direction Dw in the first state P1. Even in this case, the user sits in front of the backrest 7C, closer to the seating surface 101 in the width direction Dw than the table top 6, to avoid interference with the table top 6C in the first state P1.

In the above-described embodiment, the upward surface 102 is provided only on one side of the seating surface 101 in the width direction Dw, but the present invention is not limited to this configuration. The upward surface 102 may be provided on both sides of the seating surface 101 in the width direction Dw.
In the above-described embodiment, the chair 1 is described as having a backrest 7, a wiring connection portion 8, a panel member 9, and a plate-like member 45, but the chair may be configured without at least any of the backrest 7, the wiring connection portion 8, the panel member 9, and the plate-like member 45.
In the above-described embodiment, the table top 6 is positioned forward of the base member 3 in the second state P2 and the third state P3, but this is not limiting. In the second state P2 and the third state P3, the entire table top 6 may overlap the base member 3 in plan view.
In the above-described embodiment, the table top 6 is configured to be displaceable between the first state P1 and the second state P2 by rotating about the axis of the support member 5, but this is not limiting. For example, the table top 6 may be configured to be displaceable between the first state P1 and the second state P2 by sliding about the axis.
In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described modified examples may be combined as appropriate.

1 Chair 3 Base member 5, 5B, 5C Support member 6, 6B, 6C Table top 6f Top surface 6s Top side portion 7, 7C Backrest 7f Backrest surface 9 Panel member 45 Plate-shaped member 55 Restriction mechanism 101 Seating surface 102 Upward surface Dfr Front-rear direction Dv Up-down direction Dw Width direction F Floor surface P1 First state P2 Second state

Claims (8)

a base member having a seating surface facing upward and an upward surface formed on a side of the seating surface facing upward, the base member being installed on a floor surface with the direction in which the seating surface and the upward surface are aligned as viewed from the top-bottom direction being the width direction and the direction perpendicular to the width direction being the front-to-back direction ;
a table top plate disposed above the base member with a space therebetween and having an upwardly facing top surface;
a support member extending upward from the upward surface and supporting the table top rotatably about an axis along the vertical direction;
panel members provided on both sides of the base member in the width direction and having side plate portions surrounding a space above the base member from both sides ,
The table top is
a first state in which at least a portion of the table top overlaps the upward surface in a plan view and the entire table top overlaps the base member in a plan view;
a second state in which the table top is positioned closer to the seating surface than the first state , and
The table top has linear top side portions that extend along the sides of the base member in the first state.
chair. The chair according to claim 1 , wherein at least a portion of the table top protrudes forward beyond the base member in the second state. The chair according to claim 1 or 2 , further comprising a restricting mechanism that restricts a range of rotation of the table top around the support member. A panel member is provided at least on a side of the base member and stands upright,
The chair according to claim 3 , wherein the restricting mechanism restricts rotation of the table top from the first position toward the panel member. a base member having a seating surface facing upward and an upward surface formed on a side of the seating surface facing upward, the base member being installed on a floor surface with the direction in which the seating surface and the upward surface are aligned as viewed from the top-bottom direction being the width direction and the direction perpendicular to the width direction being the front-to-back direction;
a table top plate disposed above the base member at a distance and having an upwardly facing top surface;
a support member extending upward from the upward surface and supporting the table top rotatably about an axis along the vertical direction,
The table top is
a first state in which at least a portion of the table top overlaps the upward surface in a plan view and the entire table top overlaps the base member in a plan view;
a second state in which the table top is positioned closer to the seating surface than the first state, and
the base member includes a plate-like member having the upward surface on a side of the seating surface,
In the first state, the table top is positioned above the plate-like member. The chair according to any one of claims 1 to 5 , wherein the table top is long in a front-rear direction of the base member and short in a width direction of the base member in the first state. The chair further includes a backrest that rises upward from the base member at a portion of the width direction of the base member and has a backrest surface facing forward,
The chair according to any one of claims 1 to 6 , wherein the seating surface is formed to include a front portion of the backrest. The backrest is
the table top in the first state is positioned closer to the seating surface in the width direction,
The chair according to claim 7 , which is arranged to overlap in the width direction with at least a portion of the table top in the second state.