JP7702296B2 - Beads sofa - Google Patents

Description

The present invention relates to a bean bag sofa.

Traditionally, chairs (hereafter referred to as sofas) with cushioning not only on the seat but also on the backrest and other surfaces have been widely used. For example, Patent Document 1 discloses a sofa chair in which an internal cushion body made of soft urethane foam, rubber foam, or the like is covered with a bag-shaped cover body.

In recent years, bead sofas have been proposed in which the inside of a pouch is filled with beads. For example, Patent Document 2 proposes a bead sofa in which an inner pouch is prepared and filled with beads, and this is placed inside a cover sheet sewn into the shape of a sofa.

Japanese Utility Model Application Publication No. 58-65961 Publication No. 3062635

However, conventional sofas and beanbag sofas each have the following drawbacks.
That is, conventional sofas, such as those described in Patent Document 1, use elastic bodies such as soft urethane foam that have a fixed shape when no external force is applied, and therefore, although the sofas can exhibit cushioning properties while maintaining a suitable level of stability when a user sits on them, they do not provide a satisfactory fit in which the seat and backrest conform to the user's body shape.

On the other hand, the bean sofa typified by Patent Document 2 is filled with many small-diameter beads inside, so it easily conforms to the user's body shape and provides a good fit, but it deforms significantly when subjected to external forces, and its stability and cushioning are insufficient.

The present invention was made in consideration of the above-mentioned problems. In other words, the objective of the present invention is to provide a bean bag sofa that not only provides stability and cushioning to the user, but also provides a good fit.

The bead sofa of the present invention is a bead sofa in which beads are filled into a bag-shaped sofa sheet, the sofa sheet having a seat portion with a seating surface and an upper portion arranged on the upper surface side of the seat portion and having armrests and a backrest, a partition wall is provided between the seat portion and the upper portion, the bead storage space of the seat portion and the bead storage space of the upper portion are independent, and at least on the outer side, the boundary portion between the seat portion and the upper portion is narrowed inward .

With the above configuration, the present invention provides a bead sofa with excellent stability and cushioning, while providing the fitting feel that is unique to bead sofas, by dividing the storage space that contains the beads.

1 is a perspective view of a bean bag sofa according to one embodiment of the present invention. FIG. 1 is an exploded perspective view of a bean bag sofa according to one embodiment of the present invention. FIG. 3 is a partial cross-sectional view of the sofa shown in FIG. 2 . FIG. 2 is a perspective view of a bean bag sofa according to one embodiment of the present invention with the footrest folded up. This is an oblique view of a bean bag sofa according to one embodiment of the present invention, with the footrest and head support folded up.

The bead sofa of the present invention will be described below. For the description, a bead sofa 100 according to one embodiment of the present invention shown in Figs. 1 to 5 will be used. Fig. 1 is a perspective view of the bead sofa 100 according to one embodiment of the present invention. Fig. 2 is an exploded perspective view of the bead sofa 100. Fig. 2 shows the bead sofa 100 disassembled at a portion having independent bead storage spaces. Fig. 3 is a partial cross-sectional view of the sofa shown in Fig. 2, and more specifically, shows a cross-sectional view of the seat 20 cut along the III-III cutting plane. Fig. 4 is a perspective view of the bead sofa 100 with the foot rest 50 folded, and Fig. 5 is a perspective view of the bead sofa 100 with the foot rest 50 and head support 40 folded.

First, an overview of the present invention will be described.
The bead sofa 100 of this embodiment is constructed by filling the sofa sheet 10 with beads 56. The sofa sheet 10 has a seat portion 20 having a seat surface 22S, and an upper portion 30 disposed on the upper surface side of the seat portion 20 and having an armrest portion 32 and a backrest portion 34. A partition wall 42 is provided between the seat portion 20 and the upper portion 30, and the bead storage space of the seat portion 20 and the bead storage space of the upper portion 30 are independent of each other.

The bead sofa 100 having the above-mentioned configuration has beads 56 filled inside, giving the user an excellent fit. In addition, the interior of the seat 20 and the upper end 30 of the bead sofa 100 are independent bead storage spaces, and even when an external force is applied, the flow of the beads 56 filled inside remains in each bead storage space. Since the flow of the beads 56 is restricted in this way, the shape of the bead sofa 100 is prevented from deforming too much during use, and as a result, it is possible to provide moderate stability and cushioning in addition to a fit. Therefore, the bead sofa 100 of the present invention can provide a comfortable and balanced feeling of use that has not been found in previous sofas or bead sofas.

In addition, in the upper section 30 of the bead sofa 100, the backrest 34 and the armrest 32 are connected in a U-shape when viewed from above. Therefore, the user can place the entire arm on the armrest 32 and rest their back against the backrest 34, so that one arm and the other arm are aligned along the U-shape when viewed from above. Furthermore, the beads 56 are allowed to flow between the armrest 32 and the backrest 34, so that the body that is aligned along the U-shape is given a natural fit without any discomfort. The U-shape when viewed from above mentioned here includes similar shapes, such as a U-shape when viewed from above.
The present invention will be described in more detail below. In the following description, the head support section 40 side of the beanbag sofa 100 and each of its constituent parts will be referred to as the upper side and the footrest section 50 side as the lower side from any given point.

As shown in Figs. 1 and 2, the bead sofa 100 has a seat 20, an upper section 30, a head support section 40, and a footrest section 50. These sections have independent bead storage spaces inside. In other words, as can be seen from Fig. 2, the sofa seat 10 of this embodiment shown in Fig. 1 is composed of sofa sheet 10A constituting the seat 20, sofa sheet 10B constituting the upper section 30, sofa sheet 10C constituting the head support section 40, and sofa sheet 10D constituting the footrest section 50. Each of the sofa sheets 10A, 10B, 10C, and 10D has a bead storage space independent of each other inside. Therefore, the movement of the beads 56 between each sofa sheet (i.e., between each section) is prevented.

Each of the sofa seats 10A, 10B, 10C, and 10D is provided with a bead filling port 14. The bead filling port 14 is an opening that can be opened and closed to allow the insertion and removal of beads 56. The bead filling port 14 is constructed by appropriately attaching a general-purpose means such as a line fastener (more specifically, a zipper (registered trademark) or a zipper (registered trademark)) or a hook-and-loop fastener (more specifically, a hook-and-loop fastener (registered trademark)). If necessary, the insertion and removal of beads 56 can be made easier by providing a double line fastener or hook-and-loop fastener.

The beads 56 are made of small-diameter granules or chips, and are not particularly limited in shape, but may be spherical, columnar, cylindrical, irregularly shaped, or a mixture of two or more of these. The dimensions of the beads 56 are not particularly limited, but from the viewpoint of providing an excellent fit, it is preferable that the diameter is about 1 mm or more and 10 mm or less. From the viewpoint of providing cushioning to the bead sofa 100, the material constituting the beads 56 is preferably a foamed resin, and among these, styrene-based foamed beads, polyethylene-based foamed beads, urethane-based foamed beads, etc. are preferable. Other materials constituting the beads 56 include, for example, buckwheat husks.

In this embodiment, the seat 20 has a flat shape, and a part of its upper surface serves as the seat surface 22S. The flat seat 20 may be, for example, a square as shown in FIG. 2. Although not shown, the seat 20 may be, for example, a columnar body or a cylindrical body having a polygonal cross section other than a square.

Since the seat surface 22S is the part on which the user sits, the seat portion 20 can be said to be the part that bears the most weight among the individual parts of the bean bag sofa 100 (the seat portion 20, the upper portion 30, the head support portion 40, and the footrest portion 50).
At least a portion of the upper surface of the seat portion 20 other than the seat surface 22S is provided with a partition wall 42 that separates the seat portion 20 from the upper stage portion 30 that is disposed on the upper surface side of the seat portion 20. In this embodiment, the upper surface of the seat portion 20 is substantially composed of the seat surface 22S and the partition wall 42. The partition wall 42 may be used as both the upper surface of the seat portion 20 and the lower surface of the upper stage portion 30, or may be configured by stacking the upper surface of the seat portion 20 and the lower surface of the upper stage portion 30 that is different from the upper surface of the seat portion 20.

In this embodiment, the seat surface 22S is quilted. In the present invention, quilting refers to a process in which an elastic sheet-like material such as a urethane foam sheet 64 is laminated on the back surface of the side fabric 60 constituting the sofa seat 10 and sewn together, as shown in FIG. 3. Although not shown, any layer may be laminated on the surface of the sheet-like material such as the urethane foam sheet 64 opposite the side fabric 60, and three or more layers may be sewn together. In this embodiment, multiple sewing lines (quilt lines 24) formed by sewing the side fabric 60 and the urethane foam sheet 64 together extend in the vertical direction of the beanbag sofa 100 and are formed so as to be parallel to each other in the width direction of the seat surface 22S.

Quilting the seat surface 22S, which bears the greatest load, gives the seat surface 22S an appropriate degree of shape retention, and prevents the seat surface 22S from sinking too much due to the weight of the user when in use. Therefore, this embodiment, which has a quilted seat surface 22S, not only provides an excellent balance of stability, cushioning, and fit when seated, but also provides a comfortable feeling of being wrapped in the part of the user's body that comes into contact with the seat surface 22S. Hereinafter, the "comfortable feeling of being wrapped" that the user feels when sitting on the bean bag sofa 100 may be referred to as a feeling of support.

The side fabric 60 constituting at least the portion of the sofa seat 10 exposed to the outside is not particularly limited, and can be appropriately selected from sheets capable of constituting a general sofa seat. For example, the side fabric 60 can be woven fabric, knitted fabric, or artificial leather manufactured using natural fibers such as cotton, hemp, and wool, or chemical fibers such as polyester, acrylic, rayon, and nylon. From the viewpoint of exerting appropriate stability and cushioning properties, it is preferable to use woven fabric as the side fabric 60.
The sheet-like material such as the urethane foam sheet 64 used in the quilting process is preferably a sheet that is more elastic than the side fabric 60 and can be adjusted to any thickness. For example, the urethane foam sheet 64 is preferably a sheet-like material made of urethane foam and having a thickness of 5 mm to 15 mm.

To provide a better sense of support, it is desirable to quilt not only the seat surface 22S, but also the surfaces against which the user's body comes into contact and which bear a large load (i.e., the backrest surface 34S, the head support surface 40S, and the footrest surface 50S). In other words, it is desirable that all surfaces that support the main body of the user (from head to feet, excluding arms) are quilted. This allows the user to experience a superior sense of support from head to feet. Moreover, some or all of the surfaces other than the above-mentioned surfaces that bear a large load are not quilted and are composed only of the side fabric 60, thereby ensuring sufficient fluidity of the beads 56 in each bead storage space and maintaining a good fit.

In this embodiment, the quilting lines 24 are sewing lines that extend in the vertical direction of the beanbag sofa 100, and are provided in multiple lines in the width direction (the direction connecting the two armrest portions 32).
By stretching the quilt lines 24 in the vertical direction in this manner, the quilt lines 24 can be made to conform to the user's body, which increases the sense of support described above and is preferable because it makes it less likely that the user will feel uncomfortable due to the seams.
Furthermore, as shown in FIG. 1, when quilting is performed on the surfaces that are continuous in the vertical direction with the seat surface 22S (the backrest surface 34A, the head support surface 40S, and the footrest surface 50S, which will be described later), by providing the quilt lines 24 on each surface in the vertical direction and making them continuous in appearance, it is possible to give a sense of unity as a whole and provide an excellent design, even though each surface is made up of independent parts.
However, the present invention does not exclude configurations other than those in which the quilt lines 24 extend in the vertical direction.

The seat 20 and the upper portion 30 are connected by a partition wall 42 between the upper surface of the seat 20 and the lower surface of the upper portion 30. In this embodiment, the partition wall 42 serves both as part of the upper surface of the seat 20 and as the lower surface of the upper portion 30, and the seat 20 and the upper portion 30 are connected via the partition wall 42 by sewing.
In this embodiment, the outer edge of the partition wall 42 is formed slightly smaller than the outer edge of the cross section at the vertical middle part of the armrest part 32. Therefore, the vertical middle part of the armrest part 32 bulges outward slightly, and a constriction 25 that is constricted inward is formed at the boundary part between the seat part 20 and the upper part 30. In other words, the armrest part 32 is narrower at the lower end than at the vertical middle part. By forming the constriction 25 in this way, the fluidity of the beads 56 filled inside the armrest part 32 is regulated when the arm is placed on the armrest part 32, and the lower end side of the armrest part 32 is prevented from bulging outward too much. Therefore, the armrest part 32 is prevented from collapsing in the vertical direction, and the arm of the user can be stably supported from below.

Although the partition wall 42 can be made of the same material as the side fabric 60, in this embodiment, the partition wall 42 is made of a material different from the side fabric 60. More specifically, the fabric that makes up the partition wall 42 is preferably more stretchy than the side fabric 60 and has a smooth surface that is easy to slide on. Since the partition wall 42 is made of a material that is relatively more stretchy and smooth than the side fabric 60, when a user sits on the bead sofa 100 and leans his/her back on the backrest portion 34 and places his/her arms on the armrest portion 32, the beads 56 filled in the upper portion 30 are easily allowed to flow on the bottom surface of the upper portion 30 (the upper surface of the partition wall 42), and the bottom surface is allowed to expand moderately downward. This prevents the upper portion 30 from deforming too much during use, and provides better stability, moderate cushioning, and a good fit.

For example, a preferred combination of materials for the side fabric 60 and the partition wall 42 is to select a general woven fabric with a fabric weight of approximately 70 to 300 g/ ^m2 as the side fabric 60, and to select a taffeta fabric, faille fabric, satin fabric, or the like as the material for the partition wall 42.
Taffeta is a fabric made of a plain weave using thin warp threads and relatively thicker weft threads. Taffeta generally has more warp threads than weft threads, which gives it a distinctive ribbed surface.
Faille is a plain weave fabric similar to taffeta, but is generally thicker than taffeta and has a vertical rib weave.
Satin is a fabric made with a satin weave.
Yarns used in taffeta, faille and satin fabrics include natural fibers such as cotton and silk, as well as rayon, acetate, nylon and polyester.

Next, the head support portion 40 and the footrest portion 50 will be described.
The bean bag sofa 100 of this embodiment is provided with a head support section 40 having a head support surface 40S and a foot rest section 50 having a foot rest surface 50S in addition to the seat section 20 and the upper section 30. The head support section 40 is disposed above the backrest section 34 in the upper section 30, and the foot rest section 50 is disposed continuously further downward from the lower end of the seat surface 22S of the seat section 20. The head support section 40 is substantially rectangular, has a head support surface 40S on the upper surface, and has a backrest auxiliary surface 40T that is continuous with the backrest surface 34S. When in use, the boundary between the head support surface 40S and the backrest auxiliary surface 40T becomes unclear, and the head may be abutted against either the head support surface 40S or the backrest auxiliary surface 40T.
The footrest portion 50 is substantially rectangular, and its upper surface forms a footrest surface 50S, which is continuous with the seat surface 22S at substantially the same height.
As described above, the beanbag sofa 100, which also includes the head support section 40 and the footrest section 50, can support the entire body of the user, allowing the user to fully relax. In this embodiment, the head support section 40 and the footrest section 50 each have a substantially rectangular shape, but they can be changed to other shapes.
As described above, the head support section 40 and the foot rest section 50 each have a bead storage space independent of the other bead storage spaces. Therefore, the beads 56 filled in the bead sofa 100 are prevented from flowing to other adjacent parts of the seat section 20, the upper section 30, the head support section 40, and the foot rest section 50. Therefore, like the seat section 20 and the upper section 30, the head support section 40 and the foot rest section 50 are also prevented from being deformed too much, and the balance of stability, cushioning, and fit for the user's head and feet is excellent.

In the beaded sofa 100 having a seat portion 20 and an upper portion 30, and optionally provided with a head support portion 40 and/or a footrest portion 50, the filling rate of the beads 56 filled in each portion is not particularly limited, but from the viewpoint of more fully solving the intended problem of the present invention, it is preferably 8.0 kg/ ^m3 or more and 13.0 kg/ ^m3 or less, and more preferably 9.0 kg/ ^m3 or more and 12.5 kg/ ^m3 or less.
Furthermore, among the multiple bead storage spaces in the bead sofa 100, it is preferable that the filling rate of the beads 56 in the bead storage space in the seat 20 is the highest, and it is particularly preferable that the filling rate in each part is within the above-mentioned preferable range, and that the filling rate of the beads 56 in the bead storage space in the seat is the highest. This makes it possible to provide a bead sofa 100 that is more stable when seated and has a better holding feeling.

In this embodiment, the side fabric 60 constituting the sofa seats 10C, 10D in the head support section 40 and the footrest section 50 is made of the same material as the sofa seats 10A, 10B in the seat section 20 and the upper section 30. However, in the present invention, one or more of the sofa seats 10A, 10B, 10C, 10D can also be made of a different side fabric 60.

In this embodiment, the head support portion 40 and the backrest portion 34 are connected by a first linear connecting portion 45 that is sewn in a line between the lower end of the head support surface 40S and the upper end of the backrest surface 34S. Therefore, it is possible to rotate the head support portion 40 toward the seat surface 22S with the first linear connecting portion 45 as a rotation axis.
In this embodiment, the footrest 50 and the seat 20 are connected by a second linear connector 55 that is sewn linearly between the upper end of the footrest surface 50S and the lower end of the seat 22S. Therefore, the footrest 50 can be rotated toward the seat 22S with the second linear connector 55 as a rotation axis.

4 shows a state in which the footrest portion 50 is rotated toward the seat surface 22S with the second linear connecting portion 55 as a rotation axis. By such rotation, the footrest portion 50 can be folded toward the seat surface 22S, and the footrest surface 50S can be abutted against the seat surface 22S.
In this embodiment, the height H2 of the footrest 50 is approximately equal to or less than the height H3 of the armrest 32, and the width W2 of the footrest 50 is approximately equal to or less than the width W3 of the seat 22S. Therefore, when the footrest 50 is rotated around the second linear connecting portion 55 as a rotation axis, the footrest 50 can be placed on the seat 22S as shown in FIG. 4. In addition, as described later, when it is planned to rotate the head support portion 40, the vertical length L2 of the footrest 50 may be less than the vertical length L3 of the seat 22S. For the height, width, and vertical length of each part, refer to FIG. 2 as appropriate. In addition, in this specification, the expression "approximately the same size" in the comparison of dimensions means including a dimensional difference of about several centimeters with respect to the same size, and about several centimeters means, for example, a dimensional difference of within plus or minus 5 centimeters, and furthermore, a dimensional difference of within plus or minus 3 centimeters.
In the following description, the normal usage form shown in Figure 1 is referred to as a first usage form, the state in which the footrest portion 50 is rotated and folded down as shown in Figure 4 is referred to as a second usage form, and the state in which the footrest portion 50 and the head support portion 40 are rotated and folded down as shown in Figure 5 described later is referred to as a third usage form.

The second usage form is a preferred form when not using the first usage form or when cleaning the room. In this embodiment, the vertical length L2 of the footrest 50 is designed to be less than the vertical length L3 of the seat surface 22S, and as shown in FIG. 4, a space 26 is formed between the rotated footrest 50 and the backrest 34. The user can sit on the bean bag sofa 100 in a different position from the first usage form by completely sinking the waist into this space 26 and placing the feet on the footrest back surface 50B, which is the back surface of the footrest 50. In the first usage form, the user can sit in a position close to lying down with the whole body stretched out, whereas in the second usage form, the user can sit in a position with the upper body more upright than in the first usage form.

Next, the third usage mode will be described. In the third usage mode, as shown in Fig. 5, the footrest portion 50 is rotated toward the seat surface 22S, and the head support portion 40 is rotated toward the seat surface 22S with the first linear connecting portion 45 as the rotation axis.
In this embodiment, the height H1 of the head support part 40 is designed to be approximately the same as or less than the height H3 of the armrest part 32, and the width W1 of the head support part 40 is designed to be approximately the same as or less than the width W3 of the seat surface 22S. The sum of the vertical length L1 of the head support part 40 and the vertical length L2 of the footrest part 50 is designed to be less than the vertical length L3 of the seat surface 22S. With this design, the head support part 40 can be accommodated on the seat surface 22S together with the footrest part 50, as shown in FIG. 5.

In the third use mode, when the head support section 40 and the footrest section 50 are stored on the seat surface 22S, the top surface becomes substantially flat, and from the viewpoint of enabling good compactness, it is preferable that the sum of the vertical length L1 of the head support section 40 and the vertical length L2 of the footrest section 50 is equal to or less than the vertical length L3 of the seat surface 22S. In this mode, the head support section 40 and the footrest section 50 can be easily stored on the seat surface 22S, and the bean bag sofa 100 in the third use mode can also be used as a stool without a backrest or armrests.

As described above, the beanbag sofa 100 is designed with appropriate dimensions and is equipped with a rotatable head support section 40 and foot rest section 50 on the seat surface 22S side. In addition to the first usage mode, the beanbag sofa 100 can be used in different ways in the second and third usage modes, making it a convenient 3-way sofa.

The present invention has been described above using the beanbag sofa 100, but the above-described embodiment does not limit the present invention in any way. The beanbag sofa of the present invention includes, for example, an embodiment that does not have either or both of the head support section and/or the footrest section.

The present invention described above encompasses the following technical ideas.
(1) A bead sofa in which beads are filled into a bag-shaped sofa sheet,
The sofa seat,
A seat portion having a seat surface;
An upper portion is disposed on the upper surface side of the seat portion and has an armrest portion and a backrest portion,
This bead sofa is characterized in that a partition wall is provided between the seat portion and the upper portion, and the bead storage space of the seat portion and the bead storage space of the upper portion are independent of each other.
(2) The bean bag sofa according to (1) above, wherein the seat surface is quilted.
(3) The bean bag sofa according to (1) or (2) above, wherein at least on the outer side, the boundary between the seat portion and the upper portion is narrowed inward.
(4) In a plurality of bead receiving spaces,
The bead sofa according to any one of (1) to (3) above, in which the bead storage space in the seat portion has the highest filling rate of beads.
(5) A head support portion having a head support surface continuing upward from the backrest surface of the backrest portion, and/or
A footrest portion having a footrest surface extending downward from the seat surface,
The bead sofa according to any one of (1) to (4) above, wherein the head support section and the footrest section each have a bead storage space independent of the other bead storage spaces.
(6) The head support portion and the backrest portion are connected by a first linear connecting portion that is sewn in a line shape at a lower end of the head support surface and an upper end of the backrest surface, and the head support portion can rotate toward the seat surface side with the first linear connecting portion as a rotation axis.
The bead sofa described in (5) above, in which the footrest portion and the seat portion are connected by a second linear connecting portion that is sewn in a line at the upper end of the footrest surface and the lower end of the seat surface, and the footrest portion can be rotated toward the seat surface with the second linear connecting portion as a rotation axis.
(7) The sum of the vertical length of the head support portion and the vertical length of the footrest portion is
The seat is equal to or smaller than the vertical length of the seat surface, and
The bean bag sofa according to claim 6, wherein the height of the head support portion and the height of the footrest portion are approximately the same as or lower than the height of the armrest portion.

10, 10A, 10B, 10C, 10D... Sofa seat 12... Bead storage space 14... Bead filling port 20... Seat 22S... Seat surface 24... Quilt line 25... Waist 26... Space 30... Upper section 32... Armrest 32S... Armrest surface 34... Backrest 34S... Backrest surface 40... Head support 40S... Head support surface 42... Partition wall 45... First linear connection 50... Footrest 50B... Footrest back surface 50S... Footrest surface 55... Second linear connection 56... Beads 60... Side fabric 62... Partition fabric 64... Urethane foam sheet 100... Bead sofa H1, H2, H3... Height L1, L2, L3... Length W1, W2, W3... Width

Claims (3)

A bead sofa in which beads are filled into a bag-shaped sofa sheet,
The sofa seat,
A seat portion having a seat surface;
An upper portion is disposed on the upper surface side of the seat portion and has an armrest portion and a backrest portion,
A partition wall is provided between the seat portion and the upper portion, and a bead receiving space of the seat portion and a bead receiving space of the upper portion are independent of each other.
A bean bag sofa characterized in that, at least on the outer side, the boundary portion between the seat portion and the upper portion is narrowed toward the inside . The beanbag sofa according to claim 1, wherein the seat surface is quilted. In the plurality of bead receiving spaces,
3. The bead sofa according to claim 1, wherein the bead storage space in the seat portion has the highest filling rate of beads.

Images