Sofa and its assembly method

Abstract

To provide a sofa which is beautiful and whose assembly is easy.SOLUTION: A sofa has a seat part 1 supported by a seat retaining frame 3, and a back part 2 fixed to a back support frame 4. The back part 2 is provided with: a back part body (back base) 19 and back cushion materials 20, 21 arranged in front of the back; and a bag-shaped back spread cloth 23. Boss parts 27 above and below are protruded forward from the back support frame 4, and the back part body 19 is fixed to the back support frame 4 with a bolt 30 screwed from the front in the boss part 27. At a lower end of the back spread cloth 23, an opening 25 opened / closed with a slide fastener 24 is formed, and when the back part body 19 is fixed, the opening 25 is closed.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a sofa and an assembling method (manufacturing method) thereof. A sofa comprises a seat and a backrest, and includes two types: one with a fixed backrest, and another with a movable backrest that can also be used as a bed. The present invention is directed to the type with a fixed backrest.

Background Art

[0002] Comfort is the primary function of a sofa, and for this reason, both the seat and the backrest often are provided with thick cushion materials. As disclosed, for example, in Patent Document 1, a sofa generally has a configuration in which cushion materials for the seat portion and the back portion are arranged on a main body, and the entire sofa is covered with upholstery fabric. However, this configuration has problems such as that the work of stretching the upholstery fabric in the final assembling process is troublesome.

[0003] On the other hand, Patent Document 2 discloses a sofa having a structure in which a seat portion and a backrest are fixed to a frame structure.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problem to be Solved by the Invention

[0005] The sofa described in Patent Document 2 is of the assembly type, and examples of means for fixing the backrest and seat to the frame structure include bolts and nuts, adhesive, and nailing. Of these, adhesive and nailing are not practical, and fixing with bolts (screws) and nuts is the most practical. However, for example, when fixing the backrest to the frame material with bolts, the bolts would have to be inserted through the frame material from the back and screwed into the core material of the backrest, which raises concerns that the bolt heads would be exposed at the back and detract from the aesthetics.

[0006] The present invention was made against this backdrop, and aims to provide a sofa that is easy to assemble and aesthetically pleasing. [Means for solving the problem]

[0007] The present invention comprises many components, the typical of which is specified in each claim. Of these, the invention of claim 1 relates to the structure of a sofa. "The seat and, A backrest that supports the seated person from behind, It comprises a back support frame located behind the aforementioned back, The aforementioned back portion comprises the back portion body and the back portion body body It has an upholstery covering, The aforementioned back body is fixed to the fixing portion of the back support frame by a fixing member. It is a sofa, The portion of the back body that overlaps with the back support frame when viewed from the front. The fixing member is inserted through this. Mounting holes are formed to open at the front and back. hand, The aforementioned upholstery is, It is formed as a bag that covers the entire back, and an opening equipped with a closing mechanism is formed at the lower end of the bag in a long position in the left-right direction. " This is the structure. A fastener is preferred as a closing mechanism, but hooks or strings can also be used.

[0008] The invention of claim 2 is an extension of claim 1, "The aforementioned upholstery among Covering the back side of the aforementioned back body cormorant A relief hole is formed in the rear covering portion through which the fixing member or the fixing portion of the back support frame passes." This is the structure.

[0009] The invention of claim 3 is a development of claim 1 or 2, "said back portion further comprises a back cushion material overlapping at least the front surface of said back body, a through hole through which said fixing member can be inserted is formed in said back cushion material so as to communicate with said mounting hole, said upholstery is Through hole from the front side covering" according to this configuration.

[0010] The invention of claim 4 is also a development of claim 1 or 2, "said back support frame is formed in a vertically elongated strut shape, and a forward-facing boss portion serving as said fixing portion is formed at a portion overlapping said back portion in the front-rear direction difference , said boss portion is formed with an internal thread that receives the bolt, which is said fixing member, Front side and said back body is fixed to said back support frame by screwing said bolt into the internal thread of said boss portion" but according to this configuration. Although it is possible to provide only two boss portions on one back support frame, it is preferable to provide a plurality of boss portions at different heights.

[0011] The invention of claim 5 is also a development of claim 1 or 2, "further comprising a plurality of front legs and a plurality of rear legs, wherein said back support frame extends upward from said rear legs" according to this configuration.

[0013] The invention of claim 6 is directed to a method for assembling a sofa. That is, "comprising a seat, a back portion that supports a seated person from behind, upholstery that covers at least the front side of said back portion, and a back support frame located behind said back portion, wherein said back portion includes a back body and the whole covering downward opening ​​comprising a bag-shaped upholstery, wherein a mounting hole is formed in a portion of the back body that overlaps the back support frame in a front view" A method for assembling a sofa having the above configuration, wherein "a step of setting the back body and the back support frame at a predetermined relative position in a state where the upholstery is placed on at least the back side of the back body; With the portion of the upholstery that overlaps the back body from the front side rolled up. a step of fixing the back body and the back support frame by a fixing member inserted through the mounting hole; the upholstery is placed on the back body the whole in the state of being placed on Then close the opening at the lower end of the upholstery. a step; comprising the above steps," The invention has the following features.

Effects of the Invention

[0014] In the present invention, since the back portion is fixed to the back support frame, the back portion can be unitized in advance. Accordingly, the assembly of the sofa can be facilitated, and variation caused by assembly can be suppressed to stabilize quality.

[0015] Further, the fixing member such as a bolt for fixing the back portion is operated from the front side of the back body, the fixing member is not exposed on the rear surface of the back support frame, and the upholstery is arranged in front of the back body, so that the back body (and the mounting hole) is not exposed to the front. Therefore, the aesthetic appearance is not impaired due to the fixing structure. Accordingly, in the present invention, the back portion can be fixed to the back support frame without impairing the aesthetic appearance even though the sofa is easy to assemble.

[0016] When the back surface of the back portion is covered with the rear covering portion of the upholstery as defined in claim 2, the front and back sides of the back portion can be decorated with the upholstery to further improve the aesthetic appearance. Further, since the fixing portion of the back support frame is hidden by the rear covering portion of the upholstery and cannot be visually recognized from the rear, and the sofa presents an appearance as if the back portion is bonded to the back support frame, simplicity can be pursued to further improve the aesthetic appearance.

[0017] In the back cushion material as defined in claim 3, through holeBy providing this feature, the back cushion material can be assembled as a unit with the back body already attached, thus improving the ease of assembly. When relief holes are provided in the back cushion material in this way, it is possible to fix the back body to the back support frame and then close the relief holes in the back cushion material with plugs made of the same cushion material as the back cushion material.

[0018] For the fixing part of the back support frame, it is possible to directly form female threads on the back support frame, for example, but forming the fixing part on the boss part as in claim 4 has the advantage of preventing a decrease in the strength of the back support frame. In addition, by fitting the boss part into a hole provided in the back body, the integration between the back body and the back support frame can be increased, which also has the advantage of improving the fixing strength.

[0019] In the configuration of claim 5, since the back support frame and rear legs extend in a continuous line, the sofa can be made to look neat from the back view, improving its aesthetic appeal. In addition, the structure can be simplified, contributing to cost reduction.

[0020] Claim 1 When the upholstery is constructed as a bag-like structure, the upholstery can be easily attached without the need for time-consuming work such as stapling, thus the claim 6 The sofa can be assembled efficiently using the following procedure. Furthermore, the bag body is designed so that only the part into which the fixing member is inserted is exposed. situation Then, attach the back panel and back cushion material, and then fix the back panel to the back support frame with the fixing member. lower end By closing the opening, the sofa can be given a beautiful finish. Therefore, it is possible to ensure that the sofa has a superior aesthetic appeal.

[0021] Claim 6 As previously described, the assembly method allows you to easily assemble an aesthetically pleasing sofa. [Brief explanation of the drawing]

[0022] [Figure 1]The figure shows the first embodiment, where (A) is a perspective view from the front, (B) is a perspective view from the lower rear, and (C) is a perspective view from the lower rear. [Figure 2] Both (A) and (B) are separate perspective views of the seat. [Figure 3] (A) is a front view separated perspective of the back, (B) is a rear view separated perspective of the back, and (C) is a perspective view of the upholstery (bag body) from the rear. [Figure 4] (A) is a cross-sectional view taken along line IV-IV in Figure 1(B), (B) is a close-up view of the main part of (A), and (C) is a perspective view of the upholstery in the reversed state. [Figure 5] The figure shows the second embodiment, where (A) is a perspective view from the front, (B) is a perspective view from the upper rear, and (C) is a perspective view from the lower rear. [Figure 6] (A) is a separate perspective view of the backrest from the front, (B) is a separate perspective view of the backrest from the rear, and (C) is a separate perspective view of the seat. [Modes for carrying out the invention]

[0023] (1) First Embodiment Next, embodiments of the present invention will be described based on the drawings. First, the first embodiment shown in Figures 1 to 4 will be described. The sofa of the first embodiment is a three-seater type, and as can be seen from Figure 1(C), the sofa has a seat 1 and a back (backrest) 2 that are separate from each other, the seat 1 is attached to a seat support frame 3, and the back 2 is attached to left and right back support frames 4.

[0024] Since the sofa in the first embodiment is a three-seater, the seat 1 and backrest 2 are elongated from left to right. As a design feature, the left and right ends of the seat 1 are formed in a semi-circular shape when viewed from above, and the left and right ends of the backrest 2 are formed in a semi-circular shape when viewed from the front. Of course, it is also possible to form the seat 1 and backrest 2 in a rectangular shape.

[0025] As shown in Figures 2(B) and 2(C), the seat support frame 3 has left and right leg devices 5. The leg devices 5 have a front leg 6, a rear leg 7, and a side frame 8 connecting them, and the back support frame 4 extends upward from the upper end of the rear leg 7. A U-shaped arm 9 is attached laterally to the side frame 8, and the arm 9 is fitted into a hollow rectangular beam 10 and fixed with screws (countersunk screws, not shown). The front and rear beams 10 are connected by multiple stays 10a on the left and right sides.

[0026] The side frame 8 is curved in plan view so that the part to which the arm 9 is fixed is shifted inward on both sides. Therefore, even though the left and right ends of the seat 1 have an arc shape in plan view, they are hidden beneath the leg assembly 5 and the seat 1 and do not detract from the aesthetic appearance. The legs 6 and 7 and the side frame 8 that make up the leg assembly 5 are made of round metal pipes.

[0027] The seat 1 comprises a seat base (seat body) 11 made of a wooden board, a single ring-shaped seat cushion material 12, three layers of inner seat cushion materials 13, 14, and 15 arranged inside the ring-shaped seat cushion material 12, and seat upholstery 16 surrounding the seat cushion materials 12-15 and the seat base 11. The ring-shaped seat cushion material 12 also embraces the seat base 11. This provides good support for the user's calves. The seat cushion materials 12-15 can be simply stacked, but it is preferable to glue adjacent cushions to each other and to glue the lower layer of inner seat cushion material 15 to the seat base 11.

[0028] The seat base 11 is composed of multiple spacer plates 11c placed between the upper and lower plate members 11a and 11b. Screws are inserted into the beam 10 from below and screwed into female threads (T-nuts) provided on the seat base 11. The shape of the seat portion 1 is maintained by the ring-shaped seat cushion material 12. The inner seat cushion materials 13-15 enhance cushioning by varying their hardness, etc.

[0029] The upper end of the front leg 6 is slightly exposed above the side frame 8, but the upper end is in contact with (or embedded in) the ring-shaped seat cushion material 12. The seat cushion material may be made as a single piece, or it may be made as one ring-shaped seat cushion material 12 and one inner seat cushion material. Alternatively, a laminated structure without the ring-shaped seat cushion material 12 can also be adopted.

[0030] The seat upholstery 16 embraces the laminated structure of the seat cushion materials 12-15 and the seat base 11. The lower edge of the seat upholstery 16 can be secured to the underside of the seat base 11 with a stapler. Alternatively, the lower edge of the seat upholstery 16 can be tightened with a cord.

[0031] (2).Back As shown in Figure 3, the backrest 2 consists of a back base 19 made of a wooden board such as plywood, a ring-shaped back cushion material 20 positioned in front of it, an inner back cushion material 21 positioned inside the ring-shaped back cushion material 20 and overlapping the back base 19, a rear back cushion material 22 overlapping the rear surface (back) of the back base 19, and a back upholstery 23 covering the back base 19 and the back cushion materials 20-22. The back base 19 is an example of the backrest body described in the claim.

[0032] The inner back cushion material 21 and the rear back cushion material 22 are bonded to the back base 19 with adhesive, and the ring-shaped back cushion material 20 is bonded to the inner back cushion material 21. An angle material 19c is fixed to the upper end of the back base 19 to prevent bending in the front-to-back direction. For example, as shown in Figure 4, a cap 4a is attached to the upper end of the back support frame 4.

[0033] The back upholstery 23 is constructed as a bag-like structure having a rear covering portion 23a that covers the rear back cushion material 22 from behind. As shown in Figure 4(C), an opening 25 equipped with a slide fastener 24 is formed at its lower end, extending approximately the entire length from left to right. The slide fastener 24, as goes without saying, has a pair of tapes with numerous elements and a slider 26 for engaging and disengaging the elements, and the tapes are sewn to the back upholstery.

[0034] As shown in Figures 3 and 4, the upper part of the back support frame 4 has two cylindrical boss portions 27 projecting forward as examples of fixing parts, while a rectangular reinforcing material (spacer material) 19a is fixed to the rear surface of the back base 19, overlapping with the upper part of the back support frame 4 when viewed from the rear, and the boss portions 27 are tightly fitted into rearward-facing fitting holes 19b provided in the reinforcing material 19a. For example, as shown in Figure 3(C), the rear covering portion 23a of the back upholstery 23 has a relief hole 28 through which the boss portions 27 of the back support frame 4 pass.

[0035] Furthermore, the back base 19 has a mounting hole 29 that communicates with the boss portion 27. Mounting holes A bolt (screw) 30 inserted from the front into 29 is screwed into the boss portion 27. Therefore, the inner surface of the boss portion 27 is female threaded. The boss portion 27 is welded to the back support frame 4. As shown in Figures 3(A) and 3(B), the rear back cushion material 22 has a relief hole through which the reinforcing material 19a passes. 31a It forms a structure.

[0036] Furthermore, as shown in Figures 4(A) and 4(B), the inner back cushion material 21 has a section for inserting the bolt 30. Through hole 31 It runs through from front to back. Through hole 31 It is also possible to insert a plug made of cushioning material of the same material as the inner back cushioning material 21.

[0037] In the above configuration, the backrest 2 is covered with upholstery from both the front and back, resulting in a clean and aesthetically pleasing appearance. Furthermore, the bolts 30 are completely hidden inside the backrest 2 and are not exposed behind the back support frame 4, giving the backrest 2 the appearance of floating in mid-air, thus exhibiting excellent aesthetics.

[0038] Then, the sofa is assembled by a: the seat 1 is assembled as a unit and fixed to the seat support frame 3 with screws (bolts), and b: the back 2 is assembled as a unit and the back upholstery 23 of Partially Turn it over Inner back cushion material 21 Through hole 31 The procedure is as follows: c: leave the back exposed, d: overlap the back section 2 with the left and right back support frames 4 and fix the back base 19 to the boss section 27 of the back support frame 4 with bolts 30, and d: close the slide fastener 24 of the back upholstery 23.

[0039] Furthermore, since the unitized seat 1 and backrest 2 are fixed to the frame material, assembly is easy and the quality is stable. Therefore, an aesthetically pleasing sofa can be easily assembled. As in this embodiment, when vertically longitudinal reinforcing members 19a are provided on the back base 19, the upper and lower bosses 27 are connected to the reinforcing members 19a, and the reinforcing members 19a and the back support frame 4 become integrated, thereby significantly improving the stability and support strength of the backrest 2. This is one of the advantages of this embodiment.

[0040] As in the embodiment, by placing the rear back cushion material 22 on the back of the back base 19, the rear covering portion 23a of the back upholstery 23 is kept taut, thereby improving the aesthetic appearance. Additionally, it has the advantage of providing a softer feel when a person's body touches the back of the sofa.

[0041] (3) Second Embodiment Figures 5 and 6 show a second embodiment applied to a single-seater sofa. In this embodiment, the seat 1 is formed in a circular shape in plan view, and the backrest 2 is curved in an arc shape in plan view. As shown in Figure 5(C), the seat support frame 3 is formed by joining the left and right leg devices 5 with front and rear stays 33. The back support frame 4 is formed by extending the rear legs 7 upward, similar to the first embodiment.

[0042] The structure of the seat 1 is the same as in the first embodiment, and comprises a wooden seat base 11, three inner seat cushions 13-15 and a ring-shaped seat cushion 12, with the seat cushions 12-15 covered by seat upholstery 16.

[0043] The structure of the back section 2 is the same as in the first embodiment, and includes a wooden back base 19, a ring-shaped back cushion material 20, an inner back cushion material 21, a rear back cushion material 22, and back upholstery 23 covering them. A reinforcing material 19a is fixed to the rear surface of the back base 19.

[0044] Since the reinforcing member 19a extends over almost the entire height of the back base 19, the rear back cushion material 22 is divided into left and right halves by the reinforcing member 19a. However, by shortening the height of the reinforcing member 19a so that it is positioned between the upper and lower ends of the back base 19, the rear back cushion material 22 can be made similar to that of the first embodiment. through hole It is also possible to form 31. In Figure 6(A), the rear back cushion material 22 is shown as extending in a continuous line from left to right, but in reality, it is divided into left and right sections, or relief holes are formed in it.

[0045] As shown in Figure 5(C), the back upholstery fabric 23 is formed into a bag-like structure, and an opening 25, which is opened and closed by a slide fastener 24, is formed at its lower end, extending almost the entire length from left to right. The assembly procedure for the second embodiment is the same as that for the first embodiment.

[0046] Although the illustrated embodiment has been described above, the present invention can be implemented in various other ways. For example, in the embodiment, the seat and backrest were separate, but the invention can also be applied to a type in which the seat and backrest are continuous. In this case, the upholstery is also continuous for both the seat and backrest.

[0048] back upholstery As a means of closing the opening, it is also possible to tighten it with strings or arrange multiple hooks. In the illustrated example, the rear legs of the leg device are extended to form a back support frame, but the back support frame is dedicated products and It is also possible to arrange them in this way. It is also possible to arrange three or more back support frames. Back cushioning material is not required. Armrests may be provided.

[0049] It is also possible to place a headrest on the back. In this case, the headrest may be integrally attached to the backrest and the backrest may be fixed to the back support frame, or the headrest and backrest may be constructed as separate parts and both fixed to the back support frame. In the latter case, the headrest is made of the back as described in the claim, and its main body is inserted through a screw (bolt) from the front. in It can be fixed to the back support frame.

[0050] The components of the back support frame are not limited to round pipes; various materials and shapes such as round bars, square pipes, and sheet metal can be used. Expandable push rivets can also be used as fastening members. A structure in which stud bolts are fixed to the back support frame and nuts are screwed onto them can also be adopted. The back body can be made of synthetic resin or metal. [Industrial applicability]

[0051] The present invention can be embodied in a sofa. Therefore, it can be used industrially. [Explanation of symbols]

[0052] 1 seat 2 back 3. Seat support frame 4. Back support frame 5 legged device 6 front legs 7. Hind legs 11 seat base 12-15 Seat cushion material 16 Seating area 19 Back base 19a Reinforcement 20 Ring-shaped back cushion material 21 Inner back cushion material 22 Rear back cushion material 23 Back upholstery 23a Rear covering section 24 Slide fastener as an example of a closing mechanism 25 Opening of the back upholstery 26 Slider 27 Boss section as an example of a fixed part 28 Relief holes in the rear covering section 29 Back base Mounting holes 30 One of the fixing members example Bolts (screws) 31 Rear back cushion material through hole

Claims

1. The seat and, A backrest that supports the seated person from behind, It comprises a back support frame located behind the aforementioned back, The aforementioned backrest comprises a backrest body and upholstery covering the backrest body. The aforementioned backrest body is fixed to the fixing part of the back support frame by a fixing member, in a sofa, In the portion of the back body that overlaps with the back support frame when viewed from the front, mounting holes are formed so as to open in the front and rear directions, through which the fixing member is inserted. The upholstery is formed into a bag-like structure that covers the entire back, and an opening equipped with a closing mechanism is formed at the lower end of the bag-like structure in a long, horizontal orientation. Sofa.

2. In the rear covering portion of the upholstery that covers the back side of the back body, a relief hole is formed through which the fixing member or the fixing portion of the back support frame passes. The sofa described in claim 1.

3. The aforementioned back portion further includes a back cushioning material that overlaps at least the front surface of the main back portion, The back cushion material has a through hole formed in it through which the fixing member can be inserted, which communicates with the mounting hole. The upholstery covers the through hole from the front side. The sofa according to claim 1 or 2.

4. The aforementioned back support frame is formed in the shape of a vertically elongated support column, and a forward-facing boss portion is formed as the fixing portion in the portion that overlaps with the back front and back. The boss portion has a female thread formed therein that receives the bolt, which is the fixing member, from the front side. The back body is fixed to the back support frame by screwing the bolt into the female thread of the boss portion. The sofa according to claim 1 or 2.

5. Multiple front legs, Multiple hind legs, Furthermore, The aforementioned back support frame extends upward from the rear legs. The sofa according to claim 1 or 2.

6. A seat comprising: a seat; a backrest that supports a seated person from behind; upholstery covering the backrest at least from the front; and a back support frame located behind the backrest, wherein the backrest has a backrest body and a downward-opening, bag-shaped upholstery covering the entire backrest body, and mounting holes are provided in the portion of the backrest body that overlaps with the back support frame when viewed from the front. This is the assembly method for a sofa with this configuration. The process involves setting the back support frame and the back support body in a predetermined relative position, with the upholstery covering at least the back side of the back support body, The process involves fixing the back support frame to the back support frame by inserting a fixing member through the mounting hole while the portion of the upholstery that overlaps the back support frame from the front side is rolled up, The process of covering the entire back body with the upholstery and closing the opening at the lower end of the upholstery, It is equipped with How to assemble a sofa.

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