JPS6033483B2 - Chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The main objectives of chair design are to achieve both aesthetics and strength.

Unfortunately, it is difficult to achieve both of these objectives at the same time. Therefore, chairs that require durability have conventional structures that place emphasis on structural strength. Even molded reinforced plastic chairs are subject to design limitations due to the structural requirements of the chair, such as the need to accommodate the curvature of the chair back. Additionally, reinforced plastics are unwelcome for many design purposes due to their unsightly appearance. The present invention provides a chair having a load-bearing inner shell with an integrated seat and back portion.

A member is provided which covers the surface of the shell to give it a decorative appearance. A plastic decorative shell is fixed to the load-bearing shell by molding with a decorative appearance and integral seat and back covering parts;
The shell is covered by a decorative shell, thereby giving the chair a decorative appearance. Channels on the underside of the seat and dorsal regions of the load-bearing inner shell extend inwardly from the periphery of the inner shell to align the ends of the arms that are attached to the inner shell, so that the arms It can be folded between the outer shells without protruding any part. The invention thus contributes substantially to improving the compatibility of design and strength objectives in chair engineering. The task of designing the load-bearing shell of the chair can be given to a structural engineer, while the task of giving the chair a decorative appearance can be given to a designer. Utilizing the inventor's unique means of joining the decorative shell and the load-bearing shell, it was then possible to combine the separate work of two people to construct a single chair. can. Another object of this invention by focusing on the design is that the covering part of the seat of the decorative outer shell is
This includes providing a recess large enough to accommodate and hide the portion of the chair base to be secured to the load-bearing shell.

The decorative shell also obscures the edges of the sheath used to cover the faces of the load-bearing shell, and the sheath is wrapped around the periphery of the shell and secured to its rear side. A unique arm connection is also provided that is hidden from view by the decorative shell. Finally, another aspect of the invention is directed to providing a unique cushion assembly. That is, a plurality of cushions are adhered adjacently to the surface of the back portion of the shell. The relative density of each cushion varies depending on the weight supported by the portion of the back of the shell covered by the cushion. This unique ergonomic feature greatly improves the comfort of the chair of this invention. These and other objects and advantages of the invention will become apparent from the following description and accompanying drawings.

In a preferred embodiment, the chair of the invention has a decorative outer shell 2
1 and has an inner shell 10 disposed within and secured thereto and mounted on a base 50 (FIG. 1).

The shell 10' is provided with a suitable cover 40 (Fig. 6).
An arm 30 can also be provided (FIG. 4). FIG. 4 shows a perspective view of the fully assembled chair, as shown.
When the chair is assembled, the shell 10' is completely hidden from view. The shell 105 is also formed by molding porous polystyrene with high impact resistance. The shell body 1Q' has a seat part and a back part integrated into one body, and must have a sufficient thickness so as to have the supporting strength as a chair even without the help of the decorative outer shell 20. A thickness of about 3'8 inches (9.5 skins) has been found to be suitable and has been used. At the bottom of the shell 10 there are rectangular ribs 11 at the corners of which T-nuts are placed providing means for attaching the base 50 (FIG. 2).

The ribs 11 are thicker than the rest of the shell 10, thereby reinforcing the stiffness and support strength in this critical area. Similar reinforcing support is provided by a rib 13 that extends along the rear surface of the dorsal surface of the shell mass 0 to near its bottom. Like the rectangular rib 11, the rib 13 is thicker than the shell 10 and thereby provides additional support. Finally, the peripheral rim Qa of the shell 10 is somewhat thicker than the rest of the shell 10 to reduce the possibility of cracking in this area and to increase the stiffness of the shell. The shell body 1 has a plurality of ventilation holes 14 in the sitting area (the first part).

2) and the seat cushion 41 (FIG. 6) are ventilated.

A plurality of tufting holes 15 are provided along the seat-back joint of the shell 10 to facilitate tufting of the sheath 45, as shown at 46 in FIGS. It is supposed to be done.

To facilitate attachment of the arms 30, four channels 16 are formed in the peripheral portion of the shell 10, one on each side of the seat portion and on each side of the back portion of the shell 10. ing.

In order to facilitate the attachment of the decorative outer shell 20 to the shell body 10,
A pair of clips 17 are provided, each clip supporting a bolt 1
8 is attached to the surface of the liquid 10 (FIG. 8), and the shell 1
0 through the opening 19, and then vertically upwardly on the rear side of the shell 10 (FIGS. 1, 2, and 8). The upper end of the clip 17 forms an outer ridge 17a to facilitate fixation of the decorative outer shell 20. Decorative shell 20 is preferably injection molded from polypropylene.

This makes it possible to obtain an impact-resistant decorative shell at low cost. The decorative shell can be of sufficient thickness to retain the desired design. A thickness of approximately 9/64 inches (3.6 willow) has been found to be appropriate and has been provided. The green surrounding the decorative outer shell 2 rivers has almost the same shape as the shell 10, but the portion other than the surrounding green has a decorative shape that is completely different from the shape of the shell 10. The inner surface of the decorative outer shell 20 has a protrusion in which a pair of clip receiving recesses 21 (FIGS. 1 and 7) are formed, which cooperates with the clips 17 of the shell 10 to close the decorative outer shell 20 and the shell 10.
facilitates joining.

Each receiving recess 21 is formed by a portion protruding from the surface of the decorative outer shell 20, and is open at the bottom as indicated by the arrow in FIG. The decorative outer shell 2 has a recessed portion 22 at its bottom, that is, at the seat cover portion.

The large roundness of the recessed portion 22 allows the base 50 to be fixed when the chair base 50 is fixed to the assembly of the shell 10 and the decorative outer shell 20.
The seat support pan 51 is large enough to accommodate the seat support pan 51. Holes 23 are provided at the four corners of the recess 22 so that the bolt can pass through the decorative shell 20 and into the shell 10. Finally, a decorative cushioning band 24 is fixed along the circumference of the decorative outer shell 20 (FIGS. 6 and 8). The strip is preferably made of polyvinyl chloride and is grooved for a snap fit around the circumference of the decorative shell 20. The strip 24 serves as a buffer and also serves to close the small gap between the edge of the decorative outer shell 20 and the 10 shells. The periphery of the decorative outer shell 20 generally coincides with and is located close to the periphery of the inner shell 10. The shape of the outer shell body 10 is different from that of the inner shell body 10 above the green part around the outer shell.
As shown in FIG. 5, the arm 30 is secured to the shell 101.

The curved styrene rod 31 has the strength as the arm 30. Both ends of the rod 31 extend around the periphery of the shell 10, with one end reaching the rear side of the seat part and the other end reaching the rear side of the back part. Both ends of the rod 31 extend into the recessed channel 16 and do not protrude too much from the periphery of the shell body 10. These ends are fixed to T-nuts embedded in the shell 10' with bolts 32 or the like. A channel 16 on the underside of the dorsal portion of the inner shell 10 extends inwardly from the periphery of the shell.

Similarly, a pair of channels 16 on the underside of the seat portion of the inner shell 10 extend inwardly from the periphery. A first end of the rod 31 extends behind the back of the inner shell and is drilled into the channel 16 and is attached thereto by a bolt 32. Similarly, the second end of the rod 31 extends behind the seat of the inner shell 10 and is loosened into the channel 16 and is attached thereto by a bolt 32. The seat and back channels 16 are sufficiently deep and extend from the periphery of the inner shell 10 to a sufficient length on its back surface to meet the ends of the arms, so that the styrofoam rods 31 connect the inner shell 10 and the outer shell 20. No protrusion occurs in the gap between the two.

The decorative portion 33 is preferably made of compression molded, matte finished phenolic plastic and is secured onto the curved rod 31.

Decorative portion 33 has a channel portion 34 that mates above rod 31 and is also secured thereto by a bolt 54 that passes through rod 31 and enters a well nut embedded in decorative portion 33. To attach the cover of the shell 10, first,
The laminated seat cushion 41 is bonded to the seat portion of the shell 10 with adhesive.

The first layer of the laminate is a very dense polyurethane material and the second layer is a less dense polyurethane material. A medium density cushion 42 is adhesively bonded to the back surface of the shell 10 in the area that is to support the lumbar region of the person seated in the chair. Rather, the urethane cushion 43 is glued to the shell surface in the shoulder support area of the shell 10. In this way, the lower back of the person is supported by a dense cushion 42, and the shoulders, which require less support, are supported by a softer foam cushion 43.
The cushions 41, 42, 43 are covered with a continuous layer of padding material 44, which is covered with a sheath 45.

Both continuous layers of padding material 44 and sheathing 45 are wrapped around the periphery of shell 10, and a stable 49 etc. (eighth
(Fig.) is fixed. This is because using the stable 49 is easier than gluing. Thus, shell 10
It is important that the stabilizer 49 be rigid and dense so that it will properly hold the stable 49. Tufting of the sheath 45 at 461 (FIGS. 4 and 6) involves passing the threads 47 through the sheath 45 at selected points, pulling both ends of each thread 47 through the holes 15, and "tufting both ends of the thread with the stable 48". This can be done by fastening it to the rear surface of the body 10.

When the cover material and arm 30 are mounted in position on the shell, the decorative shell 20 can be secured to the shell 101.
The beveled end 17a of the clip 17 is inserted into the receiving recess 21 of the decorative shell 20. The clip 17 has an inclined end 17
Since a is inclined outwardly, it can be more easily positioned relative to the receiving recess 21 and can be more easily inserted into the stereotactic calendar. The rod 31 of the arm 30 fits into the recess of the channel 16 and the sheath 45 and pad 4
It does not extend beyond the cylindrical edge 10a by more than a thickness of 4. Therefore, the periphery of the decorative outer shell 20 is tightly fitted to the shell body 10. In this way, the inner shell body 10 and the decorative outer shell 20
When the base 50 is supported, the base 50 can be fixed to the shell.

The base 0 is aligned such that its seat support pan 51 is located within the recess 22 of the decorative shell 20. The bolt 52 is then inserted into the hole at the corner of the pan 51 and the decorative shell 2.
0 through the hole in the corner of the recess 22, the shell 10
Two T-nuts embedded in the corners of the rectangular ribs are inserted. By passing the decorative outer shell 20, the bolt 52 not only fixes the shell 10 to the base 501, but also serves to fix the decorative outer shell 20 to the shell 1Q'. , the edge of the exterior 45 is green and it is attached to the shell 1
The means for fixing to the rear of the 0 are completely hidden from view of the decorative shell 201.

Similarly, the ends of the arms 30 joined to the rear of the shell 10 are also hidden. The recessed channel 16 allows the arm support rod 34 to be extended to the rear of the shell 10.
The close alignment achieved between the cylindrical edge of the decorative outer shell 20 and the shell turtle 0 is not disturbed. By arranging cushions of different densities in different parts of the back of the shell 10,
The chair provides maximum comfort.

Since the cushions 41, 42, 43 are all bonded to the surface of the turtle fin with adhesive, these cushions will not bulge or shift. This also applies to the pad 44. That is, the pad 44 is made of a continuous layer, and its periphery is fixed to the rear part of the shell lo by a stable. It is also clear that by joining the shell 10 and the decorative shell 20, the shell 10 becomes more rigid than if it were used alone.

Thus, the layered structure achieved by bonding the two shells together simplifies the construction of the shell 10 and reduces its manufacturing costs. Most importantly, the highest compatibility is achieved between the two design objectives of providing structural strength and aesthetics.

Even if the material of which the shell 10 is constructed does not have an adequate appearance for many purposes, such material can be used in this invention since it will be completely invisible when the chair is assembled. Can be used for chairs. This invention achieves a unique combination of previously conflicting design objectives;
Therefore, it makes an important contribution to the field of chair design technology. It should be understood that the foregoing is merely a preferred embodiment of the invention and that many changes may be made without departing from the spirit and scope of the parentheses' invention.

[Brief explanation of the drawing]

FIG. 1 is an exploded view of the decorative outer shell and base of the chair of this invention. FIG. 2 is a perspective view of the rear side of the inner shell. FIG. 3 is a perspective view of the rear side of the decorative outer shell. FIG. 4 is a perspective view of the assembled chair. FIG. 5 is a perspective view of the assembly of the inner shell and arm. FIG. 6 is a sectional view taken along the line W~ in FIG. 4. No.? FIG. 2 is a perspective view of the upper stone portion of the decorative outer shell. Figure 8 is the 4th
It is a side-leg sectional view of the figure. FIG. 9 is a cross-sectional view of a portion of the chair showing the connection between the seat and the base. Turtle Q...inner shell body, wealth 1...rib, 13...rib, turtle 6...
... Channel belt 17 ... Clip, 28 ... Decorative outer shell,
2nd army...Clip receiving recess, 30...Arm, 31...
...Arm rod "33...Arm decoration 40...Cover" 41...Cushion, 42...Cushion, 4
3...Cushion, 44...Pad, 45...Exterior, 47...Thread, 48...Staffle ``49...Staffle, 50'''' Base. FIG. l FIG. 2 FIG. S FIG. 4 FIG. 5 FIG. 6 FIG. 7 FIG. 8 FIG. 9

Claims (1)

[Claims] 1A A load-bearing inner shell having the following (a), (b), and (c) and having the shape of a sitting part and a back part: (a) a person sitting on a chair; (b) a peripheral edge; (c) four recessed channels, one on each side of the seat and one on each side of the back; An exterior member C that is stretched beyond the periphery of the shell and fixed on the back surface of the inner shell, having the following (a), (b), and (c), and covering the back surface of the inner shell. a decorative outer shell that does not share load bearing; (a) of sufficient thickness and stiffness to maintain the required shape; (b) a peripheral portion located close to the periphery of said inner shell; and (c) a peripheral portion comprising: A shape that is substantially the same as the inner shell but has a decorative part other than the peripheral edge, D
Arms on either side of the chair having the following (a) and (b) and extending between the seat and back of the inner shell;
a) one end extending to the underside of the back of the inner shell and being fitted into and attached to the dorsal channel; (b) an end extending to the back of the seat of the inner shell and fitting into the channel of the seat; the other end attached, E; said recessed channel precludes the close fit achieved between the periphery of said decorative shell and said inner shell even if said arm extends to the rear of said inner shell; The chair consists of the above A, B, C, D, and E.