JP2017104190A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair in which a leg does not become an obstacle when the chair is used with a backrest erected, and the leg can be disposed in a desirable position when the chair is used as a bed with the backrest lodged.SOLUTION: A chair includes: a main support structure 2 placed on an installation surface F; a seat part 9 supported by the main support structure 2; a backrest 15 supported by the seat part 9 so as to move between an erected state and a lodged state; and an auxiliary leg 33 that can be fixed to the backrest 15 so as to come in contact with the installation surface F when the backrest 15 is in the lodged state and can be removed from the backrest 15. The backrest 15 includes: a storage part 25 that is provided on the back side of the backrest 15 and can store the auxiliary leg 33; a skin material 29 that covers the storage part 25; and a leg attaching part 19 that is located above the storage part 25 in the erected state and can fix the auxiliary leg 33.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a chair.

  Conventionally, a chair that can be converted into a bed by lying on its back is known (for example, see Patent Documents 1 and 2). Such a chair becomes a bed having an area large enough to receive the body of a seated occupant lying on the back while lying in a standing position. When using with the backrest lying down, a leg or auxiliary structure corresponding to the position of the center of gravity of the chair with the backrest lying down is required.

  For example, in the technique disclosed in Patent Document 1, the rear side end of the leg is located further on the back side than the back side end of the backrest in the lying state so that the backrest is stable even in the lying state. The legs have a depth of. In the technique disclosed in Patent Document 2, auxiliary legs that can be folded and stored are provided on the back of the backrest.

Japanese Patent No. 4256145 Japanese Patent No. 5503947

In the technique disclosed in Patent Document 1, since a leg that protrudes greatly in the depth direction of the chair is required in the standing state of the backrest, the space occupied by the leg within the area of the compartment secured in the facility or the like for installing the chair Becomes excessive, and the number of chairs that can be installed in this compartment is reduced.
In the technique disclosed in Patent Document 2, the leg on the back of the backrest can be folded, so that the leg does not get in the way when standing, but the backrest is stable when the backrest is lying down. Attempting to place the leg on the top of the backrest to support it would increase the position of the center of gravity of the backrest.

  The present invention has been made in view of the above-mentioned circumstances, and when used with the backrest standing, the legs do not get in the way and the backrest has a low center of gravity, and the backrest is used as a bed by lying down An object of the present invention is to provide a chair in which legs can be arranged at desired positions.

In one aspect of the present invention, the main support structure placed on the installation surface, the seat supported by the main support structure, and the main support structure are movable between a standing state and a lying state. A backrest supported by a support structure or the seat, and an auxiliary leg that can be fixed to the backrest and can be removed from the backrest so as to abut against the installation surface when the backrest is lying down And the backrest is provided on the back side of the backrest and can accommodate the auxiliary legs, a skin material covering the accommodation portion, and in the upright state above the accommodation portion And a leg mounting portion that is positioned and capable of fixing the auxiliary leg.
The chair of the said aspect fixes the auxiliary leg accommodated in the accommodating part to the leg mounting part of a backrest, and an auxiliary leg becomes a leg which supports the backrest in a lying state. For this reason, when the backrest is fallen over and used as a bed, the leg can be arranged at a position where it does not easily fall over, and it does not get in the way when the backrest is used in an upright state.

A vertical frame member in which the backrest faces the height direction of the backrest in the standing state; and a horizontal frame member that faces the width direction of the backrest in the standing state and intersects the vertical frame member. And the housing portion may be formed by the vertical frame member and the horizontal frame member.
In this case, since the housing portion is formed by the vertical frame member and the horizontal frame member for maintaining the strength of the backrest, the housing portion can also have sufficiently high strength.
The backrest may include a plurality of the vertical frame members spaced apart from each other and a plurality of the horizontal frame members spaced apart from each other.

The horizontal frame members are respectively provided at an upper portion, an intermediate portion, and a lower portion in the height direction of the backrest in the standing state, and the accommodating portion is disposed below the intermediate portion in the standing state, In the state, the leg attachment portion may be disposed above the intermediate portion.
In this case, it is only necessary to roll up the skin material to the middle part in order to expose the accommodating part and take out the auxiliary leg from the accommodating part, so that the region that becomes the free end part against the backrest when the backrest is lying down Can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, while using a backrest upright, a leg does not become obstructive, and when using it as a bed with the backrest lying down, a chair which can be arranged in a desirable position is provided. it can.

It is a perspective view which shows the front side of the chair of one Embodiment of this invention. It is a perspective view which shows the back side of the chair. It is a side view which shows a part of the chair. It is a rear view of the backrest of the chair. It is a rear view which shows the inside of the same backrest. It is a rear view which shows the inside of the same backrest. It is sectional drawing in the AA of FIG. It is a figure for demonstrating the effect | action of the chair.

  An embodiment of the present invention will be described. FIG. 1 is a perspective view showing the front side of the chair of this embodiment. FIG. 2 is a perspective view showing the back side of the chair 1. FIG. 3 is a side view showing a part of the chair 1. FIG. 4 is a rear view of the backrest 15 of the chair 1. FIG. 5 is a rear view showing the inside of the backrest 15. FIG. 6 is a rear view showing the inside of the backrest 15. 7 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 to 3, the chair 1 of this embodiment includes a main support structure 2, a seat portion 9, a hinge portion 11, a backrest 15, and auxiliary legs 33.

The main support structure 2 has a pair of left and right legs 3 and a leg cover 8 that covers the upper part of the legs 3.
The leg body 3 includes a front leg 4 disposed in the front, a rear leg 5 disposed in the rear, a connecting rod 6 that connects the front leg 4 and the rear leg 5, and a caster 7.
The front leg 4 is slightly inclined and extends in the vertical direction so that the upper end is disposed inside the chair 1 with respect to the lower end. The upper end of the front leg 4 is integrally connected to the connecting rod 6.
The rear leg 5 is disposed behind the front leg 4. The rear leg 5 is slightly inclined and extends in the vertical direction so that the upper end is disposed inside the chair 1 with respect to the lower end. The upper end of the rear leg 5 is integrally connected to the connecting rod 6.
The connecting rod 6 extends in the front-rear direction so as to connect the front leg 4 and the rear leg 5. The connecting rod 6 is integrally connected to the front leg 4 and the rear leg 5 by welding or brazing, for example.
The caster 7 is attached to each of the lower end of the front leg 4 and the lower end of the rear leg 5. In the present embodiment, a total of four casters 7 are provided on the leg 3. These casters 7 are placed on the installation surface F, and the entire chair 1 can be moved back and forth and left and right.

  The leg cover 8 has a cover upper surface 8a that is substantially the same height as the upper surface (seat surface 9a) of the seat portion 9, and is fixed to the connecting rod 6 so as to cover the upper ends of the front legs 4 and the rear legs 5 and the connecting rod 6. Has been.

  The seat portion 9 forms a substantially horizontal seating surface 9a having a rectangular shape in plan view. A fixing belt 10 for connecting the seat 9 and the backrest 15 is provided behind the seat 9. The fixing belt 10 has a hook-and-loop fastener 10 a that can be attached to the hook-and-loop fastener 24 disposed on the back side surface material 23 of the backrest 15. The fixing belt 10 is attached to the back side surface material 23 of the backrest 15, thereby restricting the backrest 15 from being tilted forward. On the left and right sides of the seat portion 9, a hinge portion 11 that connects the seat portion 9 and the backrest 15 so as to be rotatable is fixed.

As shown in FIG. 3, the hinge portion 11 includes a fixing bracket 12 fixed to the seat portion 9, a rotating bracket 13 fixed to the backrest 15, and a predetermined rotation axis 11 a with respect to the fixing bracket 12. And a ratchet mechanism 14 for rotating the rotating metal fitting 13. The ratchet mechanism 14 of the hinge part 11 allows the backrest 15 to tilt forward about the rotation shaft 11a and restricts the backrest 15 from tilting rearward about the rotation shaft 11a. Thus, the backrest 15 can be held at an arbitrary angle. In addition, the ratchet mechanism 14 can release the restriction on the tilting to the rear side by tilting the backrest 15 to the front side to the limit of the movable range. By releasing the rearward tilt restriction, the hinge portion 11 can place the backrest 15 in a lying state (a state where the backrest 15 is tilted backward from the standing state). The hinge portion 11 allows the backrest 15 to move between an upright state standing up behind the seat portion 9 and a lying-down state tilting backward from the upright state.
In the present embodiment, the hinge portion 11 can tilt the backrest 15 until the backrest 15 is disposed substantially horizontally behind the seat portion 9.

  As shown in FIGS. 3 to 7, the backrest 15 includes a front side member 16, a vertical frame member 17, a horizontal frame member 18, a leg attachment portion 19, a back side member 23, and a cushion material 28. And skin material 29.

  The front side member 16 shown in FIG. 7 has rigidity capable of supporting a seated person from the rear and receiving a load from the seated person. The front side material 16 of this embodiment is flat.

As shown in FIG. 6, the vertical frame members 17 are respectively provided at the left and right ends of the backrest 15. The vertical frame member 17 is fixed to the front side material 16 and the back side material 23 so as to be sandwiched between the front side material 16 and the back side material 23. The vertical frame member 17 is fixed to the rotating metal fitting 13 of the hinge part 11. Thereby, the backrest 15 is pivotally supported by the seat portion 9 by the hinge portion 11.
The vertical frame member 17 may be provided at an intermediate portion of the backrest 15 in the left-right direction in addition to the left-right ends of the backrest 15 in order to reinforce the backrest 15.

  As shown in FIGS. 6 and 7, the horizontal frame member 18 extends in the width direction of the backrest 15 (left and right direction of the backrest 15) in the upper portion, the middle portion, and the lower portion of the backrest 15 in the standing state. A plurality are provided. The horizontal frame member 18 is combined with the vertical frame member 17 so as to be perpendicular to the vertical frame member 17. The horizontal frame member 18 is fixed to the front side material 16 and the back side material 23 so as to be sandwiched between the front side material 16 and the back side material 23. Among the plurality of horizontal frame members 18, the distance between the intermediate horizontal frame member 18 b and the lower horizontal frame member 18 c is the distance between the installation surface F and the back side surface material 23 when the backrest 15 is laid down to be substantially horizontal. It is shorter than the distance (see FIG. 8).

As shown in FIG.6 and FIG.7, the leg attaching part 19 is distribute | arranged to the upper part of the backrest 15 in the standing state. In the present embodiment, the two leg attachment portions 19 are arranged in the left-right direction of the backrest 15 in the space between the upper horizontal frame member 18 a and the intermediate horizontal frame member 18 b.
The leg attachment portion 19 includes a flat plate portion 20 that contacts the front side surface member 16, a screw portion 21 fixed to the flat plate portion 20, and a connecting member 22 that fixes the flat plate portion 20 to the front side surface member 16.

  The flat plate portion 20 has through holes (not shown) to which the connecting members 22 can be attached at four locations that are separated so as to surround the screw portion 21. In the present embodiment, the flat plate portion 20 is a square plate-like member, and through holes for attaching the connecting member 22 are provided at the four corners of the flat plate portion 20.

  The screw portion 21 is provided at the center of the flat plate portion 20. The screw portion 21 protrudes in a direction perpendicular to the surface of the flat plate portion 20. In the present embodiment, a through hole (not shown) into which the screw portion 21 can be inserted is provided in the flat plate portion 20, and the flat plate portion 20 and the screw are inserted in a state where the screw portion 21 is inserted into the through hole of the flat plate portion 20. The connection part with the part 21 is welded all around. The screw portion 21 can be fixed to the leg mounting portion 19 and the auxiliary leg 33 by being screwed into a screw hole portion 34 of the auxiliary leg 33 described later.

  The connecting member 22 has a bolt and a nut (not shown), for example, and fixes the flat plate portion 20 to the front surface material 16. In the state where the flat plate portion 20 is fixed to the front side member 16, the center line of the screw portion 21 is directed in a direction perpendicular to the surface of the front side member 16.

  As shown in FIGS. 6 and 7, the back side surface member 23 is a flat plate member fixed to the vertical frame member 17 and the horizontal frame member 18. The back side surface material 23 is a surface for attaching the first through hole 23 a that defines the opening of the accommodating portion 25, the second through hole 23 b and the third through hole 23 c for inserting the auxiliary leg 33, and the fixing belt 10. And a fastener 24.

As shown in FIGS. 5 and 6, the front side member 16, the vertical frame member 17, the horizontal frame member 18, and the back side member 23 constitute a storage portion 25 that can store the auxiliary legs 33.
The position of the accommodating portion 25 includes two vertical frame members that are spaced apart from each other at the lower and middle horizontal frame members 18b and 18c of the backrest 15 in an upright state and the intermediate portion in the left-right direction of the backrest 15. 17a and 17b. A connecting tool 26 that can connect the auxiliary leg 33 is fixed to the inner surface of the housing portion 25.
The connector 26 is fixed to the front side surface member 16. The connector 26 has a pair of arm portions 27 that are in contact with the outer surface of the auxiliary leg 33 and sandwich the auxiliary leg 33 therebetween. Further, in the present embodiment, the two connecting tools 26 are arranged at positions separated from each other so that the one auxiliary leg 33 can be held at two positions separated from each other. The connector 26 of the present embodiment holds the auxiliary leg 33 so that the center line direction of the auxiliary leg 33 is parallel to the direction in which the horizontal frame member 18 extends.
In addition, the number of the vertical frame members 17 and the horizontal frame members 18 that form the housing portion 25 may be set as appropriate. Further, the back side member 23 is not essential for constituting the accommodating portion 25.

  As shown in FIG. 7, the cushion material 28 is disposed on the front side of the front surface material 16 in the backrest 15 in a standing state. The cushion material 28 has the flexibility to elastically deform under the load from the seated person. The cushion material 28 supports the skin material 29 so that a skin material 29 described later follows the surface direction of the surface material 16.

  As shown in FIGS. 2, 4, and 7, the skin material 29 is a flexible sheet-like member that covers the cushion material 28, the vertical frame member 17, the horizontal frame member 18, and the back side surface material 23. As shown in FIG. 4, the region of the skin material 29 that overlaps the first through hole 23 a when viewed from the direction perpendicular to the surface of the back side surface material 23 covers the first through hole 23 a so that the accommodating portion 25 is covered. Hidden. The area | region which overlaps with the 2nd through-hole 23b and the 3rd through-hole 23c among the skin materials 29 has hidden the leg attaching part 19 by covering the 2nd through-hole 23b and the 3rd through-hole 23c.

  Two fasteners 30 are provided on the back side of the backrest 15 of the skin material 29 so as to be spaced apart so as to sandwich the two leg attachment portions 19 in the left-right direction of the backrest 15. Each fastener 30 has a tape 31 in which elements are linearly arranged in the vertical direction when the backrest 15 is in an upright state, and a slider 32 connected to the tape 31. The fastener 30 is closed by moving the slider 32 to the lower end side of the backrest 15, and the fastener 30 can be opened from the lower end side of the backrest 15 by moving the slider 32 to the upper end side of the backrest 15.

  The skin material 29 located between the two fasteners 30 in the left-right direction of the backrest 15 can be separated from the back side material 23 so that the back side material 23 can be exposed. In the present embodiment, the skin material 29 located between the two fasteners 30 is connected to the horizontal frame member 18 b at the intermediate portion via the back side surface material 23. For this reason, in the present embodiment, the skin material 29 positioned between the two fasteners 30 turns up the region from the lower horizontal frame member 18c to the intermediate horizontal frame member 18b to expose the accommodating portion 25. It can be made to. In the present embodiment, the distance between the intermediate horizontal frame member 18b and the lower horizontal frame member 18c is shorter than the distance between the installation surface and the back side surface material 23 when the backrest 15 is laid down to be substantially horizontal. Therefore, the skin material 29 does not contact the installation surface (floor surface) even if the fastener 30 is left open when the backrest 15 is in a lying state.

  Further, in the region from the horizontal frame member 18b in the middle part to the upper horizontal frame member 18a, the auxiliary leg 33 is formed by pushing the skin material 29 covering the second through hole 23b and the third through hole 23c left and right. Can be inserted into the second through hole 23b and the third through hole 23c.

  The auxiliary leg 33 is a cylindrical member that has a screw hole portion 34 into which the screw portion 21 of the leg attachment portion 19 can be inserted and can contact the installation surface F. The auxiliary leg 33 of this embodiment has a straight tube shape. By attaching the screw part 21 of the leg attachment part 19 to the screw hole part 34 of the auxiliary leg 33, the auxiliary leg 33 is connected to the back so that the center line direction of the auxiliary leg 33 is perpendicular to the surface of the front surface member 16. Fixed to the droop 15.

The effect | action of the chair 1 of this embodiment is demonstrated.
As shown in FIG. 3, the chair 1 of the present embodiment can be used as a bed by setting the backrest 15 in a standing state to a lying state. When using the chair 1 of the present embodiment as a bed, first, the skin material 29 is turned up as shown in FIG. Subsequently, the auxiliary leg 33 is removed from the accommodating part 25, and the auxiliary leg 33 is fixed to the leg attaching part 19 (see FIG. 7). By turning up the skin material 29 in order to take out the auxiliary leg 33 from the accommodating portion 25, the fixing belt 10 attached to the hook-and-loop fastener 24 on the back side surface material 23 is exposed (see FIG. 2). When the fixing belt 10 is removed from the backrest 15, the backrest 15 can be tilted forward. The backrest 15 is tilted down as shown in FIG. 8 by removing the fixing belt 10 from the hook-and-loop fastener 24 on the back side material 23 and tilting the backrest 15 forward and then tilting the backrest 15 backward. be able to.
Instead of removing the auxiliary leg 33 from the accommodating portion 25 following the operation of turning up the skin material 29, the fixing belt 10 is removed from the hook-and-loop fastener 24 on the back side member 23 and the backrest 15 is tilted forward. Subsequent to the operation, the auxiliary leg 33 may be removed from the accommodating portion 25.
When the backrest 15 is lying down so as to be substantially horizontal, the surface material 16 of the backrest 15 is horizontal, and the skin material located on the front surface of the backrest 15 (upper surface in the above-described lying state) 29 is also held by the cushion material 28 so as to be horizontal. Since the auxiliary leg 33 is fixed to the front side member 16 via the leg mounting portion 19 so that the center line of the auxiliary leg 33 is perpendicular to the surface of the front side member 16, the auxiliary leg 33 resists the load of the user. The front side member 16 of the backrest 15 can be supported so as to be horizontal. As a result, even if a user gets on the backrest 15 in the lying state, the chair 1 is stabilized without falling down.

  As described above, according to the chair 1 of the present embodiment, the auxiliary leg 33 can be accommodated in the accommodating portion 25 when the backrest 15 is erected, so that the auxiliary leg 33 does not get in the way. . Furthermore, according to the chair 1 of the present embodiment, when the backrest 15 is laid down and used as a bed, the auxiliary leg 33 is disposed at a position where the chair 1 is not easily tilted even if the user gets on the backrest 15. Can do.

  Further, when the auxiliary leg 33 is accommodated in the accommodating portion 25, the skin material 29 covers the accommodating portion 25, so that the auxiliary leg 33 cannot be seen when the chair 1 is used with the backrest 15 standing upright. Can be hidden. For this reason, the theft of the auxiliary leg 33 can be prevented.

  Further, since the skin material 29 covers all of the back side of the backrest 15 including the accommodating portion 25 and the leg attachment portion 19, dust or the like is difficult to enter the backrest 15.

  Further, a hook-and-loop fastener for connecting the fixing belt 10 to the backrest 15 is provided on the back side surface material 23, and the skin material 29 covers the fixing belt 10 attached to the back side surface material 23. It is difficult to lay down the backrest 15 before turning the skin material 29 for taking out the legs 33. As a result, it is possible to prevent the chair 1 from being used as a bed without attaching the auxiliary leg 33 to the leg attaching portion 19.

  Moreover, since the accommodating part 25 is below the intermediate frame member 18 when the backrest 15 is in the standing state, the position of the center of gravity of the chair 1 when the auxiliary leg 33 is accommodated in the accommodating part 25 is increased. It is difficult and has excellent stability.

  Furthermore, the chair 1 of this embodiment is excellent in aesthetics and hygienic because the skin material 29 hanging from the backrest 15 does not contact the installation surface (floor surface) when used as a bed.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, the height of the auxiliary leg can be adjusted by adjusting the amount by which the screw portion of the leg attachment portion is screwed into the screw hole portion. In this case, even when the installation surface is not horizontal, the backrest can be laid down so that the front surface of the backrest (the surface facing upward in the lying state) is horizontal.
The shape of the auxiliary leg is not limited to the straight tube shown in the above embodiment. For example, it may have a curved shape as long as it is placed on the installation surface in the vicinity of the upper end of the backrest when the lying backrest is viewed in plan.
Moreover, although the example in which the backrest is supported by the seat is disclosed in the above embodiment, the backrest may be supported by the main support structure. For example, in a chair having a main support structure having legs and armrests, the backrest may be supported by the armrests.

DESCRIPTION OF SYMBOLS 1 Chair 2 Main support structure 3 Leg 4 Front leg 5 Rear leg 6 Connecting rod 7 Caster 8 Leg cover 9 Seat part 10 Fixed belt 11 Hinge part 12 Fixing bracket 13 Rotating bracket 14 Ratchet mechanism 15 Backrest 16 Surface material 17 Vertical frame member 18 Horizontal frame member 19 Leg mounting portion 20 Flat plate portion 21 Screw portion 22 Connection member 23 Back side surface material 24 Surface fastener 25 Storage portion 26 Connection device 27 Arm portion 28 Cushion material 29 Skin material 30 Fastener 31 Tape 32 Slider 33 Auxiliary Leg 34 Screw hole

Claims (4)

A main support structure placed on the installation surface;
A seat supported by the main support structure;
A backrest supported by the main support structure or the seat so as to be movable between a standing state and a lying state;
An auxiliary leg that can be fixed to the backrest so as to abut against the installation surface when the backrest is lying down and removable from the backrest;
With
The backrest
An accommodating portion provided on the back side of the backrest and capable of accommodating the auxiliary leg;
A skin material covering the housing portion;
A leg mounting portion that is positioned above the housing portion in the standing state and can fix the auxiliary leg; and
The chair characterized by having. The backrest
A vertical frame member facing the height direction of the backrest in the standing state;
A lateral frame member that faces the width direction of the backrest in the standing state and intersects the longitudinal frame member;
Have
The chair according to claim 1, wherein the housing portion is formed by the vertical frame member and the horizontal frame member. The chair according to claim 2, wherein the backrest has a plurality of the vertical frame members spaced apart from each other and a plurality of the horizontal frame members spaced apart from each other. The horizontal frame members are respectively provided in an upper part, a middle part, and a lower part in the height direction of the backrest in the standing state,
In the standing state, the storage portion is arranged below the intermediate portion,
The chair according to claim 3, wherein the leg attachment portion is disposed above the intermediate portion in the standing state.

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