JP2007319363A - Sofa for supporting load by hanging member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sofa which is not only excellent in a sitting feeling but also provided with strength for sufficiently bearing use by an adult. <P>SOLUTION: This sofa has a seat surface part A and a backrest part B, and a belt-like hanging member 80 made of corrugated paper is disposed so as to draw an arc to generate a void C between the seat surface part A and the backrest part B. The hanging member 80 brings about a cushion effect, and since the load is not concentrated and applied to one part like a hammock, a comfortable sitting feeling is brought about. By assembling a parallel cross structure in the inside, sufficient load withstanding strength is provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sofa in which a load is supported by a suspension member.

There is a sofa as furniture to sit in a relaxed posture.
The sofas that are usually used are not only easy to move due to their high weight due to the nature of the material, but also cause environmental problems when disposed as oversized garbage. Also, from the point of cost, it is difficult to buy new ones frequently as the child grows up.
Therefore, in recent years, many chairs using paperboard such as cardboard have been made in order to increase demand for low-cost furniture based on consideration for the environment and replacement.

However, since chairs using conventional paperboard or the like often pursue easy assembly and convenient carrying, assembly is easy but there is no sense of stability, and infants can use it with strength. There was a drawback that it was easy to break.
In addition, since it is assumed that it will be discarded immediately, there is a problem that the seating comfort is not pursued much.
JP 2001-190354 A JP 2005-21199 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sofa that is not only comfortable to sit on, but also has sufficient strength to withstand use by adults.

The present invention provides a sofa having a seat surface portion and a backrest portion,
The above problem has been solved by a sofa characterized in that a belt-shaped suspension member made of corrugated cardboard is stretched in an arc so that a cavity is formed between the seat surface portion and the backrest portion.

  In the sofa of the present invention, the suspension member is stretched so as to draw an arc so that a cavity is formed between the seat surface portion and the backrest portion. The suspension member works like a hammock, but because it is made of cardboard, the load is not concentrated on one place like a fiber hammock, It fits well on any butt and provides a comfortable sofa.

  Hereinafter, a first embodiment which is a basic structure of the present invention and a second embodiment to which the first embodiment is applied will be described. However, the present invention is not limited to these embodiments.

First embodiment

1st Embodiment of this invention is provided with the side-girder structure integrated in the seat surface part and the backrest part, and as an outer surface part which coat | covers it, a side member, a seat surface side member, a bottom member, a back member, a front member -A blindfold member is provided, and the seating comfort is improved by the suspension member.
Each member is fixed by inserting an insertion piece or a connecting member into the insertion hole, or by fitting the notch.

FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is a perspective view of an internal cross-girder structure of the first embodiment, and FIG. 3 is a view of when the cross-girder structure of the first embodiment and an outer surface portion are connected. The perspective view, FIG. 4 to FIG. 13 are development views of the respective members.
In FIG. 1, symbol A indicates a seat surface portion, symbol B indicates a backrest portion, and symbol C indicates a cavity.
In addition, what is shown is one member for each member, but in the first embodiment of the present invention, it is assumed that a plurality of the same punched portions are used, and there are 12 cross-beam members (b), Six structural members are used.

First, the internal structure members are combined.
As shown in FIG. 2, six notches 21 of the internal structure member 20 are inserted and fitted into the six notches of the cross beam member (b) indicated by reference numeral 15, and the remaining 11 wells The member (b) (reference numeral 15) is also inserted and fitted into the notches 22 and 32 of the internal structure member 20, respectively.
And it will be in the state shown in FIG. 2 by inserting so that the notch part of the cross beam member (a) of a code | symbol 10 may fit in the notch part 33 of the internal structure member 20. FIG.

Next, the outer surface part which covers the said cross-girder internal structure is assembled.
First, a valley fold is made along the lines 41A, 42A, 43A of the right side member 40A. The five insertion pieces 56A provided on the bottom member 55 are inserted into the insertion holes 44A provided on the right side member 40A.
Similarly, the left side member 40B is also valley-folded along the lines 41B, 42B, and 43B, and the insertion piece 56B provided on the bottom surface member 55 is inserted into five insertion holes 44B provided on the left side member 40B. Also insert.
At this time, the side member surfaces 47A and 47B are placed inside so as not to be seen from the outside.

Next, in order to fix the back member and the side member, the surfaces 63 and 64 of the back member 60 are folded and the insertion piece 61A provided on the back member 60 is provided on the right side member 40A. Is inserted into the insertion hole 45A.
The side member and the back member are perpendicular to the bottom member, the insertion piece 61B of the back member is inserted into the insertion hole 45B of the left side member 40B, and the side member surfaces 48A and 48B are not visible from the outside. Put it inside.
The insertion piece 62 provided on the surface 64 of the back member 60 is inserted into the back side insertion hole provided in the bottom member 55 from the lower side of the bottom member 55 toward the inside of the sofa, and the back member 60 and the bottom member are inserted. 55 is fixed.

Next, the front member and the side member are fixed.
The front member 65 is folded along the fold line, the surface 66 is inserted below the bottom member, and the side member surfaces 49A and 49B are folded inside the sofa. The three insertion pieces 68A and 68B are inserted into the side member insertion holes 46A and 46B.
The insertion piece 67 provided on the surface 66 of the front member is inserted into the front side insertion hole provided in the bottom member 55 from the lower side of the bottom member 55 toward the inside of the sofa, and the front member 65 and the bottom member are inserted. 55 is fixed.

Hereinafter, the connection between the internal structure of the cross beam and the outer surface will be described.
The above-described cross-girder internal structure surface 36 is inserted into the back member 60, the surface 37 is inserted into the bottom member 55, and the surface 38 is in contact with the front member 65 (FIG. 3).
The side member 52 is folded inward along the backrest of the side member 40 and the folding line 51 of the seat surface.
The upper part of the front member 65 is tilted to the seat surface side, the insertion pieces 69A and 69B of the front member are inserted into the insertion holes 50A and 50B of the side member surface, and the cut portion 70 of the front member is Insert into the notch 34.
The face 76 is inserted by fitting the notch 77 of the blind member 75 to the notch 34 of the internal structure member. The blind member 75 is covered with the internal structure member 20 and the side member 40 toward the backrest portion, and the blind member insertion piece 78 is inserted into the seating surface of the side member 40 and the insertion hole of the backrest portion. Insert.

The suspension member 80 of FIG. 11 is made of corrugated cardboard and has a belt-like shape. As shown in FIG. 1, the suspension member 80 is stretched so as to form a cavity C between the seating surface portion A and the backrest portion B and draw an arc. It is. Make a mountain fold on line 81 and a mountain fold on line 84. The suspension member surface 82 is in contact with the back member 60, and the insertion piece 83 of the suspension member 80 is inserted into the insertion hole 65 of the back member 60.
The notch 86 of the suspension member surface 85 is inserted into the notch 34 of the internal structure member 20. Sitting comfort can be improved by making a slight crease along the dent provided in the width direction of the central portion of the suspension member 80 (FIG. 1).

Second embodiment

  The second embodiment of the present invention is similar to the first embodiment in that the seat surface portion and the backrest portion are provided with a cross-girder structure and the sitting comfort is improved by the suspension member. The strength of the outer surface portion that supports the triangle is increased by combining the triangular shape and the trapezoidal shape, and the seat surface portion and the backrest portion are rounded, thereby providing a comfortable sitting comfort together with the suspension member. In addition, the design is improved by adopting a lot of curved surfaces and attaching blindfolds.

12 is a perspective view of the second embodiment of the present invention, FIG. 13 is a perspective view when the back member of the second embodiment is attached, FIG. 14 is a perspective view of when the back member and the front member are connected, FIG. Is a perspective view of the internal structure of the backrest and the seating surface, FIG. 16 is a perspective view when the cross beam is assembled, and FIGS. 17 to 34 are development views or plan views of the respective members.
In FIG. 12, symbol A indicates a seat surface portion, symbol B indicates a backrest portion, and symbol C indicates a cavity.
In the second embodiment of the present invention, it is assumed that a plurality of the illustrated members are used, the seat surface side blindfold is 2 sheets, the backrest side blindfold is 2 sheets, the first connecting member is 30 sheets, Two second connecting members, 26 third connecting members, five seat internal structure members, five back internal structure members, seat well members (a), (b), ( 2) each of c) and (e), 6 for (d), 6 for the backrest girder member (a), and 2 for each of (b) to (d).

Hereinafter, a method for connecting the base member and the backrest side member will be described.
Referring to FIGS. 17 and 18, 110A, in which base member 100 is valley-folded with line 110a, and 160A, in which backrest side member 150A is valley-folded with line 160a, are in contact with each other on the outer surfaces. Arrange so that. The distal end portion 641 of the first connecting member 640 is inserted from the insertion hole 111A of the base member 110A into the insertion hole 161A of the backrest side member 160A. At that time, the rear end 642 of the first connecting member 640 hooked on 111A is folded back to the 112A side. Thereafter, the connecting member front end portion 641 protruding from 161A is folded back, inserted into 162A, and fixed through the insertion hole 643 of 112A and the connecting member rear end portion 642. Similarly, the other four insertion holes 110A and 160A are also fixed.

  As for the base member 110B and the backrest side member 160B, the outer surface of the base member 100 that is valley-folded with a line 110b and the backrest side member 150B that is valley-folded with a line 160b are 160B. Arrange them so that they touch each other. The distal end portion 641 of the first connecting member 640 is inserted from the insertion hole 111B of the base member 110B into the insertion hole 161B of the backrest side member 160B. At that time, the rear end 642 of the first connecting member 640 hooked on 111B is folded back to the 112B side. Thereafter, the connecting member front end portion 641 protruding from 161B is folded back and inserted into 162B, and fixed through the insertion hole 643 of 112B and the connecting member rear end portion 642. Similarly, the other four insertion holes 110B and 160B are also fixed.

Hereinafter, the connection method of a base member and a seat surface side member is demonstrated.
The base member 100 is 120A that is valley-folded with a line 120a and the seating side member 210A that is valley-folded with a line 210a is arranged so that the outer faces that are valley-folded contact each other. The distal end portion 641 of the first connecting member 640 is inserted from the insertion hole 121A of the base member 120A into the insertion hole 211A of the seating surface side member 210A. At that time, the rear end 642 of the first connecting member 640 hooked on 121A is folded back to the 122A side. Thereafter, the connecting member front end portion 641 protruding from 211A is folded back, inserted into 212A, passed through the insertion hole 643 of 122A and the connecting member rear end portion 642, and fixed. Similarly, the other four insertion holes 120A and 210A are also fixed.

  Next, 120B, in which the base member 100 is valley-folded with a line 120b, and 210B, in which the seat surface side member is valley-folded with a line 210b, are arranged so that the outer surfaces that have been valley-folded contact each other. The distal end portion 641 of the first connecting member 640 is inserted from the insertion hole 121B of the base member 120B into the insertion hole 211B of the seating surface side member 210B. At that time, the rear end portion 642 of the first connecting member 640 caught by 121B is folded back to the 122B side. Thereafter, the connecting member front end portion 641 protruding from 211B is folded back, inserted into 212B, and fixed through the insertion hole 643 of 122B and the connecting member rear end portion 642. In the same manner, the other four insertion holes 120B and 210B are also fixed.

The assembly of the base member and the side member is made three-dimensional using the first connecting member.
First, the base members 104 and 105 are each made into a valley fold. The second connecting member 660 is inserted into the insertion hole 113A of the base member 110A from the base member side, the insertion piece 661 protruding from the insertion hole 113A is folded back, and the difference provided closer to the protruding insertion piece Pass through the entry hole 662.

  Similarly, another second connecting member 660 is inserted into the insertion hole 123A of the base member 120A from the base member side, the insertion piece 661 protruding from the insertion hole 123A is folded back, and the folded insertion piece is returned. It passes through an insertion hole 662 provided on the side closer to 661.

  Thereafter, the insertion surface 661 opposite to the insertion piece 661 fixed to the insertion hole 113A with the side surfaces 102 and 103 of the base member 100 facing toward the 101 side is moved from the base member side to the insertion hole 113B. The connecting member 661 that has been inserted and protruded from the insertion hole 113B is folded and passed through the insertion hole 662 of the second connection member 660 and fixed.

  Similarly, the insertion piece 661 opposite to the insertion piece 661 fixed to the insertion hole 123A is inserted into the insertion hole 123B from the base member 101 side, and the insertion piece 661 protruding from the insertion hole 123B is folded back. Then, it is fixed through the insertion hole 662 of the connecting member.

A method for attaching the back member to the assembly will be described below.
First, while leaving the back member 260, the back member 270 is folded along the line 251 to the surface 280 side.
The base member 101 of the assembly is set to the bottom surface, and the back member 260 is inserted up to the line 251 under the base member from the direction of the base member 104.
After the line 251 is inserted, the back member 270 is folded back toward the side on which the back side members 160A and 160B are fixed, and the back member 280 is made vertical.

  The backrest side members 170A and 170B are folded to the back member side along lines 170a and 170b, respectively, and the insertion pieces 171A of 170A are inserted into the insertion holes 283A provided in the corresponding back member 280, respectively. The insertion pieces 171B are also inserted into the insertion holes 283B provided in the corresponding back members 280, respectively. The backrest side members 173A and 173B are folded into the sofa interior side.

  The distal end portion 681 of the third connecting member 680 is directed outward at all 12 locations of the insertion holes 172A and 172B of the insertion pieces 171A and 171B protruding from the insertion holes 283A and 283B of the back member 280 to the inside of the sofa. insert.

  The insertion piece 261 of the back member 260 is inserted into the insertion hole 131 of the base member 101, and from the base member 104 side to the insertion hole 262 of the insertion piece 261 protruding from the insertion hole 131 toward the sofa inner side. The state shown in FIG. 13 is obtained by inserting and fixing the distal end portion 681 of the third connecting member 680 toward the 102, 103, and 105 sides.

A method for connecting the front member to the base member and the seating surface side member will be described below.
With the front member 310 left, the front member 330 is folded along the line 301 toward the surface 340 side.
From the direction of the base member surface 105 under the assembly, the front member 310 is put under the base member up to the line 301.
After entering the line 301, the front member 330 is tilted toward the side where the seating surface side members 210A and 210B are fixed, and the front member 340 is made vertical.

Fold the seat side members 220A and 220B to the front member side along lines 220a and 220b, respectively, insert the four insertion pieces 221A of 220A into the four corresponding insertion holes 343A provided in the front member 340, respectively. The four insertion pieces 221B of 220B are also inserted into the four corresponding insertion holes 343B provided in the front member 340, respectively.
The seating surface side members 223A and 223B are folded into the sofa inside.

  The third connecting member 680 is attached to all eight positions of the insertion holes 222A and 222B on the insertion pieces 221A and 221B protruding from the insertion holes 343A and 343B of the front member 340 to the inside of the sofa. The seating surface side member 220 is fixed to the front member 340.

  The insertion piece 311 provided in the front member 310 is inserted into the insertion hole 132 provided in the base member surface 101, and the insertion hole 312 provided in the insertion piece 311 protruding from the insertion hole 132 is inserted into the insertion hole 312. The third connecting member 680 is inserted and fixed from the base member 104 side to the 102, 103, 105 side.

Hereinafter, a method for connecting the back member and the front member will be described.
The insertion pieces 163A and 163B of the backrest side members 160A and 160B are bent vertically upward, and the insertion pieces 163A and 163B are inserted into the insertion holes 274A and 274B of the back member 270.

  Next, the insert pieces 213A and 213B of 210A and 210B are bent vertically upward on the seat surface side member, and the front member 330 is stacked on the seat surface side members 210A and 210B to be provided on the front member 330. The insertion pieces 213A and 213B of the seating surface side member are inserted into the insertion holes 332A and 332B.

Finally, the front member 320 is tilted to the back member 270 side, and the insertion piece 321 provided on the front member 320 is inserted into the insertion hole 273 of the back member 270.
The sofa of the present embodiment at the time when the connection of the front member and the rear member is finished is in the state of FIG.

Next, a method for assembling the internal structural members of the backrest and the seating surface will be described.
32, the face 765 of the backrest reinforcing member 760 is folded, and the notches 742 provided in the five backrest internal structure members 740 are inserted into the five notches 771 of the face 765, respectively. Thus, the backrest internal structure surface 741 is in contact with the backrest reinforcing member surface 766.
The backrest reinforcing member surface 767 is tilted so as to be in contact with the backrest internal structure member surface 757, the backrest reinforcing member surface 768 is folded toward the backrest internal structure member, and the backrest internal structure member 740 is cut. The notch portion 772 of the backrest reinforcing member surface 768 is inserted into the notch portion 756.

Similarly, the surface 728 of the seating surface reinforcing member 720 is also valley-folded, and the notches 702 provided in the five seating surface internal structure members 720 are inserted into the five notches 732 of the surface 728, respectively. Thus, the seating surface internal structure surface 701 is in contact with the seating surface reinforcing member surface 727.
The seat-surface reinforcing member surface 726 is tilted so as to be in contact with the seat-surface inner structure member surface 717, the seat-surface reinforcing member surface 725 is folded toward the seat-surface inner structure member side, and the seat-surface inner structure member 700 is cut. The notch portion 731 of the seating surface reinforcing member surface 725 is inserted into the notch portion 716.

The blindfold / reinforcing member 350 is folded at a line 351, folded at a line 352, and folded at a line 353.
The five notch portions 391 provided on the blindfold / reinforcing member surface 390 are the notch portions of the five seating surface internal structure members in which the notch portions 731 of the seating surface reinforcing member are already inserted. 716, respectively.
As described above, the assembled state of the backrest and the internal structural member of the seating surface is as shown in FIG.

  Next, a method for assembling the backrest and the seating surface by combining the assembly portion of the backrest and the seating surface internal structure member assembled with the assembly to which the base member and the like are assembled will be described.

With the notch 743 of the backrest internal structure member facing upward, the backrest reinforcing member surface 766 is in contact with the back member surface 284, and the backrest internal structure surface 767 is in contact with the front member surface 320 and the back member surface 274. And inserted into the joined body.
The back member surface 282 is folded toward the inside of the joined body so that the cut portion 285 of the surface 282 is fitted with the cut portion 742 of the internal structure member 740 at a right angle.

The seat surface internal structure member notch 703 is on the front side, 715 is on the back side, and the seat surface reinforcing member surface 727 is in contact with the front member surface 340 and the seat surface reinforcing member surface 726 is in contact with the front member surface 330. Combine with the inside of the joint.
The front member surface 342 is folded toward the inside of the joined body so that the cut portion 345 provided in the surface 342 is fitted with the cut portion 702 provided in the seating surface internal structure member 700.

The blindfold / reinforcement member 350 is installed along the back member 250 and the backrest internal structure member 740, and the notch 361 of the blindfold / reinforcement member 350 is fitted into the notch 755 of the backrest internal structure member 740. Insert to match.
The insertion pieces 181A and 181B provided on 180A and 180B of the backrest side member 150 are inserted into the insertion holes 371A and 371B of the blindfold and reinforcing member and fixed.

  33 are inserted into the notches 706, 707, 708, 710, 711, 712 of the seating surface internal structure member 700 of FIG. . The notch portions 801 of the two seat surface cross beam members (c) 800 are inserted into the notch portions 705 and 713 of the seat surface inner structure member 700. The notches 791 of the two seat surface cross beam members (b) 790 are inserted into the notches 704 and 714 of the seat surface internal structure member 700. Finally, the notches 781 of the two seat surface cross beam members (a) 780 are inserted into the notches 703 and 715 of the seat surface inner structure member 700.

The notches 831 of the six backrest girder members (a) 830 are inserted into the notches 746, 747, 748, 750, 751, 752 of the backrest internal structure member 740, respectively. The notches 841 of the two backrest girder members (b) 840 are inserted into the notches 745 and 753 of the backrest internal structure member 740. The notches 851 of the two backrest girder members (c) 850 are inserted into the backrest internal structure members 743 and 754.
By the above operation, a well structure of the seat surface portion and the backrest portion is completed (FIG. 16).

Hereinafter, the installation of the seat cover, the backrest cover and the suspension member will be described.
23 is inserted from the back side of the seating surface internal structure member 700 so as to sandwich the backrest side member 150 and the base member 100.
The front seat surface cover 400 is also arranged so as to sandwich the seat surface side member 200 and the base member 100 under the seat surface inner structure member 700.

In order to connect the protruding portion 410A of the front seat surface cover 400 and the protruding portion 460A of the rear seat surface cover 450 in FIG. 23, the protruding portion 410A is inserted in a state where the leading ends of the protruding portions are aligned toward the seating surface internal structure member side. The first connecting member 640 is passed through the hole 411 from the tip end portion 641 and is passed through the protruding portion 460A insertion hole 461A. The rear end portion 643 of the first connecting member 640 is folded back to the insertion hole 412 side. And the front-end | tip part 641 of the 1st connection member 640 which protruded from the insertion hole 461A is folded, and it passes through the insertion hole 462A of the protrusion part 460A, The insertion hole 412A of the protrusion part 410A and the insertion hole of the 1st connection member 640 Insert into 642 and fix.
Similarly, the front seat surface cover 410B and the rear seat surface cover B are also fixed in the same manner.

The five notch portions of the front seat surface cover portion 420 are inserted so as to fit into the notch portions 702 respectively provided on the five seat surface inner structure members. The front seat surface cover 400 is tilted back so as to cover the upper portion of the seat surface inner structure, and the five notch portions of the front seat surface cover portion 430 are provided in the five seat surface inner structure members. Insert into part 709.
Similarly, the rear seat surface cover 450 is also tilted to the front side so as to cover the upper portion of the seat surface inner structure, and the five notch portions of the rear seat surface cover portion 470 are cut in the seat surface inner structure member 700. Insert into the insert portion 709.

  The notched portion of the seat surface cross beam member (e) 820 is replaced with the notched portion 782 of the seat surface cross beam member (a), the notched portion 792 of the seat surface cross beam member (b), the seat surface cross beam member (c). Both sides are inserted into the notch portion 802 and the notch portion 812 of the seat surface cross beam member (d).

Hereinafter, a method for assembling the backrest will be described.
The back cover part 510 is valley-folded and the suspension member 550 is disposed so as to face the part where the valley member is folded, and the first connecting member 640 is inserted from the insertion hole 561 of the suspension member 550 into the insertion hole of the back cover cover 510. Insert into 511. At that time, the rear end portion 642 of the first connecting member 640 caught in the insertion hole 561 is folded back toward the 562 side. Thereafter, the connecting member front end portion 641 protruding from the insertion hole 511 is folded back and inserted into the insertion hole 512, and is fixed through the insertion hole 562 and the insertion hole 643 of the connection member rear end portion 642.
Similarly, all eight insertion holes provided in the back cover 510 and the suspension member 550 are fixed.

With the back cover cover 540 on the front side, the space 501 of the back cover 500 is passed through the back structure internal structure member and the upper part of the back support side member, and the notch 526 of the back cover cover 525 is passed through the back. It inserts so that it may fit in the notch part 755 of the internal structure member 740 which falls.
The notch part 531 of the backrest cover part 530 is also inserted so as to fit into the notch part 749 of the backrest internal structure member 740.

Similarly, the notch part 521 of the backrest cover part 520 is inserted so as to fit into the notch part 742 of the backrest internal structure member 740, and the backrest cover part 510 side and the suspension member are covered to the front side. The backrest cover portion 510 and the suspension member 560 are inserted so as to fit into the notch portion 749 of the backrest internal structure member 740.
The notch 861 of the backrest girder member (d) denoted by reference numeral 860 is inserted into the notch portions 832, 842, and 852 of the backrest girder members (a) to (c), and both sides are fixed.

  In order to reinforce the suspension member 550, the wings 570 and 580 of the suspension member 550 are folded back to the seating surface side so as not to be seen from the outside. The notch 591 of the suspension member 550 is inserted into the notch 709 of the seating surface internal structure member, and the suspension member 550 is fixed. Also in the case of the sofa of the second embodiment, as shown in FIG. 12, the suspension member 550 is installed in an arc shape like a hammock, and receives a hip at a rounded portion.

  Although the structure itself is the same as described above, there is no problem. However, since the cross girder structure of the seating surface and the backrest portion can be seen from the outside, blindfolds are installed in this embodiment. Below, the installation method is demonstrated.

  The seat surface side blindfold 600 of FIG. 26 is mountain-folded along a line 601 and fitted to both sides of the seat surface cover so that the blindfold portion 610 can be seen on the outside. In order to fix the seating surface side blindfold, the front seating surface cover portion 440 and the rear seating surface cover portion 480 are folded back along lines 441 and 481 and inserted into the insertion holes 611 provided in the seating surface side blindfold 600.

Similarly, the backrest side blindfold 620 is folded in a line 621 so that the blindfold portion 630 can be seen on the outer side, and is fitted on both sides of the backrest cover. In order to fix the backrest side blindfold, the backrest cover portion 540 is folded back along the line 541 and inserted into the insertion hole 631 provided in the backrest side blindfold 620.
The sofa of 2nd Embodiment is completed by the above (FIG. 12).

As described above, the sofa of the present invention realizes a comfortable seating comfort by providing a suspension member like a hammock, and further has a cross-girder structure inside the seat surface portion and the backrest portion, Providing a sofa as a furniture that has a triangular and trapezoidal shape for the internal structure and load-bearing parts, does not use metal bolts and adhesives, and has sufficient load-bearing strength Made it possible.
Needless to say, the detailed points such as the number of members are not limited to those shown in the drawings.

The perspective view of the sofa of 1st Embodiment of this invention. The perspective view of the internal well structure of 1st Embodiment. The perspective view at the time of connecting the cross-girder structure and outer surface part of 1st Embodiment. (A) And (b) is a top view of two types of cross beam members of 1st Embodiment. The top view of the internal structure member of 1st Embodiment. (A) And (b) is a development view of the left and right side members of the first embodiment. The expanded view of the bottom face member of 1st Embodiment. The expanded view of the back member of 1st Embodiment. The expanded view of the front member of 1st Embodiment. The expanded view of the blindfold member of 1st Embodiment. The expanded view of the suspension member of 1st Embodiment. The perspective view of the sofa of 2nd Embodiment of this invention. The perspective view at the time of attaching the back member of 2nd Embodiment. The perspective view at the time of connecting the back member and front member of a 2nd embodiment. (A) And (b) is a perspective view of the backrest and the internal structure of a seat surface of 2nd Embodiment. The perspective view at the time of having assembled the cross beam of 2nd Embodiment. The expanded view of the base member of 2nd Embodiment. The expanded view of the backrest side member of 2nd Embodiment. The expanded view of the left-right seat surface side member of 2nd Embodiment. The expanded view of the back member of 2nd Embodiment. The expanded view of the front member of 2nd Embodiment. The expanded view of the blindfold and reinforcement member of 2nd Embodiment. (A) And (b) is an expanded view of the seat surface cover of 2nd Embodiment. The expanded view of the back cover of 2nd Embodiment. The expanded view of the suspension member of 2nd Embodiment. The developed view of the bearing surface side blindfold of 2nd Embodiment. The developed view of the back side blindfold of 2nd Embodiment. (A), (b), (c) is a top view of three types of connection members of 2nd Embodiment. The top view of the seat surface internal structure member of 2nd Embodiment. The expanded view of the reinforcement member for seat surfaces of 2nd Embodiment. The top view of the backrest internal structure member of 2nd Embodiment. The expanded view of the reinforcement member for the backrest of 2nd Embodiment. (A) thru | or (e) is a top view of five types of bearing surface girder members of 2nd Embodiment. (A) thru | or (d) are top views of four types of backrest girder members of 2nd Embodiment.

Explanation of symbols

A Seat member B Backrest member C Cavity 10 Cross girder member (a)
15 Cross girder member (b)
20 Internal structure member 80 Suspension member 550 Suspension member

Claims (6)

In a sofa having a seat surface portion and a backrest portion,
The belt-shaped suspension member made of corrugated cardboard is stretched so as to draw an arc so that a cavity is formed between the seat surface portion and the backrest portion,
sofa.   The sofa according to claim 1, wherein a width direction end portion of the suspension member is folded inward.   The sofa according to claim 1 or 2, wherein a plurality of recesses are provided in a width direction on a surface of the suspension member.   The sofa according to any one of claims 1 to 3, further comprising a cross-girder structure inside the seat surface portion and the backrest portion.   A sofa according to any of claims 1 to 4, wherein the sofa is entirely assembled from cardboard elements.   The sofa according to any one of claims 1 to 5, wherein all elements are connected by fitting, and no connecting bracket or adhesive is used.

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