JP6198758B2 - sofa - Google Patents

Description

  The present invention relates to a sofa, and more particularly, to a sofa that can sit in a good posture and has a low burden on the waist.

  Conventionally, as described in Patent Document 1 (Japanese Patent Laid-Open No. 10-276861) and Patent Document 2 (Japanese Patent Laid-Open No. 2000-116457), a reclining sofa is made of wood or metal pipe. A structure having a seat and a backrest formed by attaching a cushion material made of an elastic material or the like to the frame is used.

  Soft cushions are often used for the seats and backrests of these sofas, so that they can sit with their bodies relaxed. On the other hand, if the seat surface is too soft, the position of the waist will not be constant, and sitting for a long time may cause fatigue in the waist. Has been made.

  Further, Patent Document 3 (Japanese Patent Laid-Open No. 8-280489) discloses a curved surface of a body part in which the thickness of the cushion on the seating surface is made different so that the lower part of the lower part of the buttocks is low and the vicinity of the knee is high when sitting It is known that the undulations along the surface can be configured to reduce fatigue due to long-term use by supporting the seating position so that it does not shift back and forth.

Japanese Patent Laid-Open No. 10-276861 JP 2000-116457 A JP-A-8-280489

  However, if the undulation of the shape along the curved surface of the body is realized only by the thickness and hardness of the cushion, the cushion may be deformed at the time of sitting, resulting in a problem that the seating comfort is deteriorated. On the other hand, if you try to improve the bottoming problem by increasing the thickness of the cushion as a whole, the thickness of the cushion will increase, so the stability at the time of sitting will deteriorate and the waist support effect will not be sufficiently obtained This causes a problem.

  Therefore, the technical problem to be solved by the present invention is that the waistline can be supported in a natural posture when sitting without causing the problem of sitting comfort due to the bottom of the cushion. It is to provide a sofa that can reduce fatigue.

  In order to solve the above technical problem, the present invention provides a sofa having the following configuration.

The sofa of the present invention is a seat frame in which upper and lower fixed portions provided at different height positions are opposed to each other in the front-rear direction,
A plurality of belt-like support members provided on the seat frame so as to connect the upper and lower fixed portions facing each other and to be spaced apart from each other and aligned in the lateral direction;
A seat cushion disposed on the belt-like support member,
The belt-like support members adjacent to each other in the lateral direction are provided on the seat frame so as to be fixed to the fixing portions alternately above and below.

  The seat frame includes a pair of sub-frames extending laterally inward and downward of the frame-shaped main frame, the upper fixing portion being the main frame and the lower fixing portion being the sub-frame. By providing, the width of the design to determine the installation location of the fixed part can be expanded, the depth of the recess of the seating surface formed by the adjacent belt-like support member can be adjusted, and more stable during sitting Can be planned.

  By configuring the belt-like support member with an elastic material that can be stretched in the length direction, elastic deformation of the seat cushion support surface is allowed, and even when a thin seat cushion is used, the problem of bottoming is eliminated. Can do. As the belt-like support member, a spring can be preferably used.

  The seat frame further includes a connecting member extending in the lateral direction so as to intersect the plurality of belt-like support members, so that a gap between adjacent belt-like support members is adjusted, and the seat is constituted by the belt-like support members. The seat cushion can be stably supported on the support surface of the cushion.

A back frame connected to the seat frame, and a back cushion supported by the back frame;
The back cushion is divided into upper and lower parts, and the lower back cushion has a structure in which a relatively hard outer cushion is covered around the inner cushion material to support the back when sitting. Can be performed more suitably. That is, when you lean against the back cushion on the surface, the outer cushion adjusts your waist to the shape of the person's back and supports it firmly, and while sitting for a long time, the inner cushion deforms and softens your back And can respond to the fine movement in the front-rear direction of the user while sitting.

  The seat cushion is divided into front and rear, and the cushion on the back side uses a softer cushion material than the cushion on the front side, so that the abutment of the buttocks is firmly supported and You can sit in a posture that keeps your body deep without sinking your thigh. Moreover, it is preferable that the seat cushion divided | segmented into front and back is comprised so that the boundary line may become the vicinity of the cross | intersection position of the said strip | belt-shaped support member arrange | positioned alternately.

  According to the present invention, since the belt-like support members are provided on the seat frame so that the vertical direction is alternately reversed, the support surface of the seat cushion constituted by the belt-like support member and the seat frame is the central portion. Therefore, the seat surface according to the body shape can be maintained without causing the problem of bottoming of the seat cushion. In addition, by making the seating surface V-shaped, it is possible to sit with the pelvis standing as compared to a planar seating surface, and the pelvis is kept standing by wrapping the buttocks with the seat cushion when sitting. The

  Therefore, without causing the problem of sitting comfort due to the bottom of the seat cushion, it is possible to support the waistline in a natural posture when sitting, and to reduce fatigue even after prolonged use.

It is a partial section perspective view showing typically the composition of the sofa concerning the embodiment of the present invention. It is a top view which shows the structure of the flame | frame of the sofa of FIG. It is a front view which shows the structure of the flame | frame of the sofa of FIG. It is sectional drawing in the IV-IV line of FIG. It is the elements on larger scale which show the structure of the frame of the sofa of FIG. It is a schematic diagram which shows the laminated structure of the seat cushion used for the sofa of FIG. It is a figure which shows typically the direction of the force added to a seat surface by a buttocks when sitting on the sofa of FIG.

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

  FIG. 1 is a partial cross-sectional perspective view schematically showing the configuration of a sofa according to an embodiment of the present invention. The sofa 1 according to this embodiment is a multi-seat sofa in which a plurality of people can sit side by side in the horizontal direction. As shown in FIG. 1, the sofa 1 is composed of a seat 2 on which a person sits, a backrest 3 on which a back is rested when seated, and an armrest 4 for placing elbows provided at both ends.

  A wooden frame 5 as shown in FIG. 1 is provided inside the seat 2, the backrest 3, and the armrest 4, and an exterior material 8 is provided outside the frame 5. Further, the seat 2 and the backrest 3 are attached to the seat 2 and the backrest 3. A seat cushion 6 and a back cushion 7 are arranged.

  FIG. 2 is a plan view showing the configuration of the frame 5 of the sofa 1 according to the present embodiment. FIG. 3 is a front view showing the configuration of the frame 5 of the sofa 1 according to the present embodiment. 4 is a cross-sectional view taken along line IV-IV in FIG. In the frame 5, a pair of elbow frame 9 provided in the armrest 4 provided at both left and right ends are arranged separately in the horizontal direction, and the opposite left and right elbow frame 9 is built in the seat 2 and the backrest 3. The seat frame 10 and the back frame 11 are connected.

  2 and 3, the pair of left and right elbow frame 9 is provided along the left and right side surfaces of the elbow rest 9a and the left and right sides of the elbow rest 9a, respectively, as shown in FIGS. Side plates 9b and 9c. Between the left and right side plates 9b, 9c, the upper end is connected by a coping 9d. Around the elbow rest 9 a of the elbow frame 9, an armor 4 is configured by applying exterior materials such as upholstery.

  As shown in FIG. 2, the seat frame 10 includes a main frame 12 provided with substantially the same dimensions as the seat surface and a sub-frame 13 provided inside the main frame 12. The main frame 12 is configured in a substantially rectangular shape in plan view having a horizontal frame 12a facing in the front-rear direction and a vertical frame 12b facing in the horizontal direction. The horizontal frame 12 a is a flat plate provided between the pair of left and right elbow part frames 9. On the other hand, as will be described later, the vertical frame 12b has a shape in which the central portion is bent into a low V shape so as to follow the support surface 15s (see FIG. 4) of the seat cushion 6 of the belt-like support member 15.

  The main frame 12 and the sub-frame 13 are provided with a belt-like support member 15 as will be described later, and the seat cushion 6 is attached to the upper surfaces of the horizontal frame 12a, the vertical frame 12b, and the belt-like support member 15.

  The sub-frame 13 is provided substantially parallel to the horizontal frame 12a of the main frame 12, and is fixed to the inner side of the main frame 12 below the horizontal frame 12a of the main frame 12 via connecting members 14a and 14b. .

  A plurality of belt-like support members 15 that support the seat cushion are arranged in parallel in the seat frame 10 with a gap in the lateral direction. As the belt-like support member 15, a steel spring (so-called S spring) is used in which a steel material that can expand and contract in the longitudinal direction is bent in an S shape. The pitch between the adjacent belt-like support members 15 is not particularly limited, and may be determined as appropriate in consideration of the user's load assumed by the sofa 1 and the elastic modulus of the S spring.

  The belt-like support member 15 is fixed to the upper surface of the horizontal frame 12 a of the main frame 12 and the sub frame 13 of the seat frame 10 via the fixing bracket 16. Since the sub-frame 13 is provided below the horizontal frame 12a of the main frame 12, as described above, the height positions of the horizontal frame 12a of the main frame and the upper surface of the sub-frame 13 are different. The horizontal frame 12 a of the main frame 12, the upper surface of the sub-frame 13, and the fixing bracket 16 function as upper and lower fixing portions for fixing the belt-like support member 15.

  Since both ends of the belt-like support member 15 are fixed to the upper surfaces of the horizontal frame 12a and the sub-frame 13, the height positions of both ends are different and are arranged obliquely. Furthermore, in the relationship with the belt-like support members 15 adjacent to each other, the attachment positions are attached so that they are alternately turned up and down. In the present embodiment, the belt-like support members 15 are alternately provided one above the other. Alternately.

  As shown in FIG. 4, the belt-like support member 15 attached to the seat frame 10 as described above intersects at the intermediate portion when viewed from the side, and a part thereof enters the lower side of the adjacent belt-like support member. . In the belt-like support members 15 arranged in this manner, the surface of the portion existing above the intersection 15c functions as the support surface 15s of the seat cushion 6. The shape of the support surface 15s defined in this way is a V-shape in which the vicinity of the intersection position 15c of the belt-like support member 15 is recessed, and is constituted by the belt-like support members 15 that are different from before and after the intersection 15c.

  As shown in FIG. 1, the seat frame 10 is provided with two cloth waving tapes 19 extending in the lateral direction so as to intersect with the plurality of belt-like support members 15. In the present embodiment, both ends of the waving tape 19 are fixed to the vertical frame 12 b and are disposed on the upper side of the respective belt-like support members 15. The feeling of bottoming of the seat cushion 6 can be reduced by the waving tape 19.

  The belt-like support members 15 are connected to each other in the vicinity of the intersection 15c by, for example, a string-like connection member 19a. Both ends of the connecting member 19a are fixed to the belt-like support members 15 at the left and right ends, and are fixed to these at the intersections with the belt-like support member 15 in the middle. When a local load is applied to the seating surface of the connecting member 19a, only the specific belt-like support member 15 formed of the S spring is extremely bent in the height and the left-right direction, and the gap between the adjacent S springs Can be prevented, and the seat cushion 6 can be stably supported. Note that, for example, the connection between the connecting member 19a and the belt-like support member 15 may move with a certain degree of freedom only in a certain direction, for example, in the lateral direction or the depth direction. As the connecting member 19a, a material having a certain degree of tensile strength can be used, and steel, fiber, and the like are preferably used.

  The back frame 11 provided between the elbow frame 9 includes a vertical frame 17a as shown in FIG. The thickness dimension of the back frame 11 is configured to become smaller as it goes upward, and the upper end is connected by a horizontal frame 17b. The vertical frame 17a is provided with a horizontal beam 17c with a gap in the height direction.

  Further, as shown in FIG. 1, a plurality of cloth waving tapes 18 are provided on the back frame 11 with a gap in the vertical and horizontal directions along the backrest surface. The side plates 9 b and 9 c of the back frame 11 and the elbow frame 9 are integrally formed, and an exterior material 8 such as cloth is applied around the periphery, and the back cushion 7 is installed on the surface of the exterior material 8.

  As described above, the seat cushion 6 is disposed on the seat cushion support surface 15 s constituted by the horizontal frame 12 a and the vertical frame 12 b of the seat frame 10 and the upper surface of the belt-like support member 15. The seat cushion 6 has a configuration in which urethane materials having different hardnesses are stacked, and an exterior material 20 such as cloth is provided on the surface.

  FIG. 6 is a schematic diagram showing a laminated structure of seat cushions. In the seat cushion 6, as shown in FIGS. 1 and 6, the lowermost layer 21 and the second layer 22 are formed in a V shape along the support surface 15s, and the surface layers 23 and 24 thereof are belt-like shapes that intersect each other. The support member 15 is divided in the front-rear direction near the intersection 15c, that is, in the vicinity of the support surface 15s being bent, and each is covered with the exterior material 20. The front surface layer 23 has a further two-layer structure (upper surface layer 23a and lower surface layer 23b).

  Further, the upper surface layer 23 a of the front surface layer 23 extends from the seat surface to the front surface side of the seat frame 10, and the exterior material 20 covers the surface.

  As for the urethane material which comprises a seat cushion, the lowermost layer 21 and the upper surface layer 23a are comprised by the same somewhat hard urethane material. The second layer 22 is made of hard chip urethane, and the outer surface layer 24 and the lower surface layer 23b are made of a soft urethane material.

  The seat cushion 6 having different material hardness as described above has a soft surface on the surface layer 24 on the back side where the buttocks abut when seated, and the lower second layer 22 is made of a hard material. And a stable sitting comfort. Further, since the upper surface layer 23a of the front surface layer 24 is slightly stiff, the thigh on the seating surface does not sink, and the user can sit in a posture in which the body can be easily deposited on the backrest 3 side and the back muscles can easily extend.

  In addition to the hardness of the material, the seat surface of the seat cushion 6 has a V-shaped structure with an angle at the front and back as shown in Fig. 7, so that the hip and waist fit the heel and back of the seat surface. Wrapped up and supported, it is difficult to fall down later, and it is a sitting posture in which the back and legs are stretched naturally.

  Furthermore, not only the thickness of the seat cushion, but also the support surface 15s itself of the seat cushion is bent by the attachment structure of the belt-like support member 15, and the seat surface is undulated along the line of the human body. In addition to suppressing the occurrence of bottoming, it does not impair the stability when seated due to the thick cushion.

  In addition, the belt-like support member 15 that determines the support surface 15s is independently formed before and after the intersection 15c when the body is moved forward and backward, such as leaning forward or leaning back while sitting. Since it bends, it is possible to change the shape of the support surface 15 s itself and maintain the support when sitting.

  As shown in FIG. 1, the back cushion 7 includes an upper back cushion 25 and a lower back cushion 26 and is divided into upper and lower parts. The lower back cushion 26 is configured to protrude slightly compared to the upper back cushion 25 so as to fill the gap between the back and the back along the curve of the spine, so that the human back can be firmly supported. The cushion material has a double structure.

  In the cushion material of the lower back cushion 26, the inner cushion material 26a is made of silicone cotton, and the outer cushion material 26b is made of a urethane material that is relatively harder than the inner cushion material 26a. The outer cushioning material 26b has a hardness and a material that can stabilize the backrest posture by making the backrest of the sofa conform to and support the shape of the back of the person while the seated person leans against the backrest 3. Just choose. The inner cushion material 26a is selected from a softer material than the outer cushion material 26b, and is compressed rapidly at the start of the backrest to reduce body stress due to the repulsion of the urethane. Reduce rebound stress.

  With this configuration, the cushion material of the lower back cushion 26 supports the waist when sitting for a long time by supporting the waist with the shape of the person's back with the outer cushion when leaning against the back cushion on the surface first. However, the inner cushion is deformed and the back can be softly wrapped, and the back support during sitting can be more suitably performed in response to the fine movement in the front-rear direction of the user during sitting.

  As described above, according to the sofa according to the present embodiment, the structure of the back cushion 7 and the seat cushion 6 of the backrest 3 and the seat surface bent in a V shape stand the pelvis as the base of the spine. , You can sit with your back muscles stretched naturally.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect. For example, the sofa has been described by exemplifying a person with a plurality of people, but it may be a sofa with one person or a simple one without an armrest.

  Further, when fixing the seat frame of the belt-like support member, the both ends are fixed to the main frame and the sub-frame, but the present invention is not limited to this configuration. It is only necessary that the adjacent belt-like support members are alternately provided at different heights.

  Further, the belt-shaped indicating member is not limited to the S spring, and for example, the belt-shaped indicating member may be of any type as long as it is configured in a belt shape and can support the seat cushion thereon, such as a belt tape made of cloth or rubber. Is not limited.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1 Sofa 2 Seat 3 Backrest 4 Armrest 5 Frame 6 Seat cushion 7 Back cushion 8 Exterior material 9 Elbow part frame 9a Elbow rest part 9b, 9c Side plate 9d Head frame 10 Seat part frame 11 Back part frame 12 Main frame 12a Horizontal frame 12b Vertical frame 13 Sub-frames 14a, 14b Connecting member 15 Band-like support member 15c Crossing position 15s Seat cushion support surface 16 Fixing bracket 17a Vertical frame 17b Coping 17c Cross beam 18 Wavebing tape 19 Waving tape 19a Connection member 20 Seat cushion extrapolating material 21 Bottom layer 22 First 2 layers 23 front surface layer 23a upper surface layer 23b lower surface layer 24 back surface layer 25 upper back cushion 26 lower back cushion 26a inner cushion material 26b outer cushion material

Claims (8)

A seat frame in which upper and lower fixed portions provided at different height positions are arranged opposite to each other in the front-rear direction;
A plurality of belt-like support members provided on the seat frame so as to connect the upper and lower fixed portions facing each other and to be spaced apart from each other and aligned in the lateral direction;
A seat cushion disposed on the belt-like support member,
The sofa, wherein the belt-like support members adjacent to each other in the lateral direction are provided on the seat frame so as to be fixed to the fixing portions alternately above and below each other.   The seat frame includes a pair of sub-frames extending laterally inward and downward of the frame-shaped main frame, the upper fixing portion being the main frame and the lower fixing portion being the sub-frame. The sofa according to claim 1, wherein the sofa is provided.   The sofa according to claim 1 or 2, wherein the belt-like support member is made of an elastic material that can expand and contract in a length direction.   The sofa according to claim 3, wherein the belt-like support member is formed of a spring.   The sofa according to any one of claims 1 to 4, wherein the seat frame further includes a connecting member extending in the lateral direction so as to intersect with the plurality of belt-shaped support members. A back frame connected to the seat frame, and a back cushion supported by the back frame;
The back cushion is configured by being divided into upper and lower parts, and the lower back cushion has a structure in which a relatively hard outer cushion is covered around an inner cushion material. The sofa according to any one of 5 to 5.   The said seat cushion is divided | segmented into the front and back, The cushion material softer than the cushion on the near side is used for the back cushion, The any one of Claim 1 to 6 characterized by the above-mentioned. Couch described in one.   The sofa according to claim 7, wherein the seat cushion divided into the front and rear is configured such that a boundary line thereof is in the vicinity of an intersection position of the alternately arranged belt-like support members. .

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