JP2000093250A - Body support device such as chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure high cushioning performance even when a cushion body is not placed as an inner member, or when a cushion is thin. SOLUTION: An outer member 43 is composed of a base body 46 made of a metal plate, and an auxiliary carrier 61 of synthetic resin, and the auxiliary support body 61 is fitted in an overhang part 46c of the base body 46 to be fixed. A side part of the auxiliary carrier 61 is formed in a V-letter form (or U-letter form) in a front view to allow elastic deformation. In an inner member 44, a number of slits are formed. By elastic deformation of the auxiliary carrier 61, the inner member 44 moves to fall as a whole, and the inner member 44 is deformed in such a way that a part where human body pressure is strongly applied is concentrically recessed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body support device for supporting a person (animal) in a sitting state or a sleeping state, such as a chair, a bed, a sofa, and a stretcher.

[0002]

2. Description of the Related Art In a chair, which is a typical example of a body supporting device, a seat portion and a back portion generally have cushioning properties. The most common method for providing cushioning properties is to put a thick cushioning material such as sponge or urethane foam on the seat or back substrate.

[0003] However, since the cushion material is worn away during use, it is difficult to secure a comfortable sitting comfort with the cushion material alone. Therefore, it has been considered to improve the cushioning property. One example is 4-1180
In the publication No. 59 and the like, when the back of the chair is composed of an inner member to which a cushion material is stretched and an outer member that supports the inner member from behind, the outer member can be bent and deformed rearward. It is disclosed that the flexible resin is made of a synthetic resin having excellent flexibility.

Japanese Patent Application Laid-Open No. Hei 9-82643 discloses that an inner member of a seat portion and a back portion is formed in a hollow shape, a peripheral wall portion thereof is formed in a bellows shape, and an air vent hole is formed in the inner member. Discloses a configuration in which the inner members are compressed and deformed against the elasticity of the peripheral wall.

[0005]

The structure disclosed in Japanese Utility Model Laid-Open No. 4-118059 merely secures the locking function of the back by utilizing the elastic deformation of the outer member. It cannot be said that it can fit. For this reason, there is a limit in improving sitting comfort. On the other hand, JP-A-9-
In the case of Japanese Patent Publication No. 182643, the inner member is easily bent and deformed, so that it is considered that the seating comfort can be improved as compared with the Japanese Utility Model Laid-Open Publication No. 4-118059. However, this Japanese Patent Laid-Open No. 9-18
In the case of Japanese Patent No. 2643, there is a problem that it is difficult to manufacture the inner member in a hollow shape with high precision, and that the inner member becomes thicker as a whole.

[0006] It is an object of the present invention to provide a body support device which solves these problems.

[0007]

An object of the present invention is to provide an electronic apparatus comprising: an inner member formed of a synthetic resin into a plate shape so as to be able to bend and deform when a body pressing force is applied; An outer member for supporting the member in a state where both ends are supported, the inner member and the outer member being fixed at the edge thereof, and at least one of the side portions of both members having a V-shaped cross section. The shape of the inner member is folded back into a U-shape or the like, or both are fixed in a V-shape or U-shape, so that the inner member approaches the outer member as a whole due to the pressing force of the body. Forming a permissible deformation permitting portion ".

[0008] The above object is achieved by providing an inner member formed of a synthetic resin into a plate shape so as to be able to bend and deform when a body pressing force acts thereon,
An outer member for supporting the inner member in a state where both ends are supported, a portion where the inner member and the outer member are fixed at their edges, and the inner member has a portion where the pressing force of the body strongly acts. A large number of slits are formed to bend and deform as much as possible. "

[0009] The outer member may have a single structure made of a metal plate or a synthetic resin.
As a configuration comprising a metal base body having left and right overhangs extending toward the left and right side edges of the inner member, and a pair of left and right synthetic resin auxiliary supports attached to the overhangs of the base body, The auxiliary support may have a strength capable of flexing and deforming by the pressing force of the body acting via the inner member.

In the present invention, the entire periphery of the inner member may be supported by the outer member. For example, in the case of a seat or back of a chair, only the left and right sides of the inner member may be supported. In any case, it is included in the “state of supporting both ends” described in claim 1.

[0011]

According to the first aspect of the present invention, when a pressing force of the body acts on the inner member, the inner member itself is bent and deformed, and the deformation permitting portion is elastically deformed. It shifts to approach. That is, while the inner member has a tendency to sink as a whole due to the load on the body, the inner member bends and deforms to fit the outer surface of the body.

Therefore, even if the cushion member is not stretched on the inner member or the cushion is thin,
High cushion performance can be ensured. Further, since the inner member and the outer member are separate bodies, they can be manufactured with higher accuracy than when they are formed in a hollow shape. Further, it is possible to provide a sharp appearance by avoiding thickening.

[0013] On the other hand, according to the structure of the second aspect, the inner member itself can be bent and deformed in accordance with the pressing force of the body. For example, when applied to the chair seat,
It can be elastically deformed so that a part hit by a human ischium sinks greatly, and as a result, the inner member can be fitted to the body. In other words, the pressing force (body pressure) of the body can be uniformly supported by the large area of the inner member. In other words, the pressure acting on the body as a reaction from sitting can be evenly distributed, thereby preventing or significantly reducing certain parts of the body from being compressed, and thus keeping the body in a comfortable state. Can be supported.

Therefore, even in the second aspect, high cushioning performance can be ensured even if the cushion member is not provided on the inner member or the thickness of the cushion is small. In addition, since the inner member and the outer member are separate bodies, they can be manufactured with higher precision than when formed in a hollow shape, and furthermore, a sharp appearance is given by avoiding thickening. It is also possible to take the form. According to the third aspect of the present invention, the inner member can be formed in a simple form, thereby facilitating the production by the injection molding method or the like. In addition, since the auxiliary support is made of a synthetic resin, it is provided with elasticity. Therefore, high cushioning performance can be ensured in a state where manufacturing is easy. In this case, it is preferable to adopt a structure in which a number of slits are provided in the inner member.

Further, according to the fourth aspect of the present invention, the auxiliary support can be easily and firmly attached, and when the auxiliary support is fixed to the base with screws, the screws are prevented from being exposed. There is also an advantage that can be done.

[0016]

Next, an embodiment of the present invention will be described. . First Embodiment (FIGS. 1 to 4) FIGS. 1 to 4 show a first embodiment in which the present invention is applied to a chair. FIGS. 1 and 2 are perspective views of the chair and FIGS.
Is an exploded perspective view of a main part, and FIG. 4 is a front sectional view of the main part.

The chair includes a leg 1 with a caster 1 a, a seat 2 supported by the leg 1, and a back 3. The seat 2 includes a seat outer member 4 and a seat inner member 7 disposed above the seat outer member 4. The back 3 includes a back outer member 3a, and a back inner member 8 disposed in front of the back outer member 3a. The back outer member 3a is attached via a back support 6 projecting rearward from the seat outer member 4, or is formed integrally with the seat outer member 4. Seat inner member 7
On the surface of the inner member 8 for the back, a cushion body 9 made of a soft foamed resin (such as a soft urethane foam) having a small thickness is attached, and the surface of the cushion body 9 is covered with a cloth cloth (chair) 10.
It is preferable to cover with.

The back outer member 3a is made of glass-reinforced synthetic resin (FRP) in which an epoxy resin or a polypropylene resin is impregnated into glass fibers, and has a rigid structure that is hardly elastically deformed. On the other hand, the seat inner member 7
The back inner member 8 is made of a synthetic resin such as a nylon resin, a polypropylene resin, or a glass-reinforced synthetic resin (FRP) obtained by impregnating a glass fiber mat with each of the above resins, and has an appropriate size under a predetermined load. The structure (shape / thickness) to obtain the amount of elastic deformation.

The first embodiment is applied to the seat 2, and details thereof are shown in FIGS. The seat inner member 7 is formed in a thin plate shape. In FIG. 3, the seat inner member 7 is shown in an inverted state. The outer member 4 for the seat portion includes one base body 5.
And a pair of left and right auxiliary supports 11. The base body 5 is made of metal such as an aluminum die-cast product,
A rigid structure that is hardly elastically deformed is produced by making it thick with a hard synthetic resin such as glass reinforced synthetic resin (FRP) in which an epoxy resin or a polypropylene resin is impregnated into glass fiber.

The base member 5 of the seat outer member 4 includes a horizontal base portion 5a, a pair of left and right mounting feet 5b projecting downward from the lower surface of the base portion 5a, and a pair of left and right mounting feet 5a. The left and right mounting feet 5b are fixed to the upper end of the leg 1 with bolts 12. Reference numeral 13 denotes an insertion hole for the bolt 12. The pair of auxiliary supports 11 and the seat inner member 7 are elastically deformed by the load of the occupant.

The auxiliary support 11 of the seat outer member 4 is
As shown in FIGS. 3 and 4, when viewed from the front, it is formed in a substantially V-shaped horizontal shape or a substantially U-shaped horizontal shape. Therefore, the auxiliary support 11 is a deformation permitting portion (claim 1) for lowering the seat inner member 7 as a whole when seated. At the lower end of the auxiliary support 11, an overhang 5c of the base body 5 is provided.
A mounting hole 16 for screwing a bolt 15 into a screw hole 14 formed in the hole is formed. The length in the front-rear direction of the upper piece 11a of both auxiliary supports 11 is set longer than the length in the front-rear direction of the outer member 4 for the seat so that the left and right sides of the inner member 7 for the seat can be supported over a wide range. Have been.

The upper piece 11a of the auxiliary support 11 has a pair of locking claws (engaging claws) projecting from the lower surface of the inner member 7 for the seat portion.
A rectangular locking hole (engaging hole) 18 into which the fitting 17 is fitted is formed. As shown in FIG. 4, the auxiliary support 11 is fixed to the left and right overhang portions 5c of the base body 5 with bolts 15. After fixing the auxiliary support 11 to the base body 5, the left and right auxiliary support 11
The inner member 7 and the auxiliary support 11 are fixed by being fitted into the locking holes 18 of the inner member 7 against the elasticity of the locking claws 17 of the inner member 7.

In this case, the cover material 10 covering the cushion body 9
If the edge piece is sandwiched between the upper piece 11a of the auxiliary support 11 and the inner member 7, a separate means for fixing the surface material 10 is not required. In the above configuration, the load W
When acts on the inner member 7 for the seat portion, as shown by a two-dot chain line in FIG. 4, the auxiliary support 11 of the outer member 4 for the seat portion has its upper piece 11a approaching the overhang portion 5c of the base body 5. Thus, the auxiliary support 11 is elastically deformed and deformed so as to reduce the bending angle. At the same time, the seat inner member 7 elastically bends and deforms so as to curve upward and concave.

As described above, even if the thickness of the cushion body 9 is small, the entire seat 2 can be formed in an appropriate amount by the bending deformation of the left and right auxiliary support members 11 and the bending deformation of the entire seat inner member 7. Since the sun sinks, the seated person 2 can be given a soft feeling that the whole of the seat portion 2 fits, and as a result, comfortable cushion performance can be given. In particular, as shown in FIG. 3, when a plurality of slits 20 are formed by drilling in the seat inner member 7 at a location where the buttocks of the occupant hit and in the vicinity thereof, the location of the slit 20 and its In the vicinity, the elasticity performance (bending amount per unit load) of the seat inner member 7 becomes softer (larger) than other portions, so that the seated person can alleviate the feeling of pressure applied to the buttocks, thereby improving cushion performance. A high comfortable chair can be provided.

The slit 20 is provided in the inner member 7 for the seat.
Of these, when provided on the lower surface of the thigh of the seated person, there is an advantage that swelling of the foot is less likely to occur because pressure on the thigh is eliminated. . Second Embodiment (FIG. 5) The second embodiment shown in FIG. 5 is also applied to the seat 2 of the chair. In this embodiment, the left and right side edges of the seat inner member 21 are integrally provided with the folded portions 21b extending obliquely inward at the left and right side edges of the main body portion 21a of the seat inner member 21. It has a V-shaped (U-shaped) cross-section deformable portion.

Similar to the first embodiment, the seat inner member 21 is made of a material having an appropriate amount of elastic deformation under a predetermined load, such as glass fiber reinforced plastic, and has a thickness capable of elastic deformation. When the folded portion 21b is fixed to the base body 5 in a cantilevered state, the seat inner member 21 as a whole descends due to seating by a person.

The base member 5 of the seat outer member 4 has the same rigid structure as that of the first embodiment. On the upper surface of the base 5 near the free end of the overhang portion 5c, a plurality of pairs of locking claws 22 are protruded at appropriate intervals in the front-rear direction of the chair. On the other hand, a plurality of locking holes 23, such as square holes, into which the locking claws 22 are fitted and engaged are formed in the left and right folded portions 21b of the seat inner member 21 along the front-rear direction. .

A cushion member 9 having a small thickness is attached or placed on the upper surface of the main body 21a of the inner member 21 for the seat portion, and the upper surface is covered with the same covering material 10 as in the first embodiment. I have. Also in the second embodiment, when the load W of the occupant acts on the main body 21a of the seat inner member 21,
The projecting portion 5c of the base member 5 in the seat outer member 4 does not bend, and the folded portion 21b of the seat inner member 21 is elastically deformed so that the angle formed with the main body 21a is reduced (narrowed). As the entire inner member 21 sinks, the main body 21a elastically bends and deforms in an upwardly concave shape so that the central portion thereof sinks largely (see a two-dot chain line state in FIG. 5).

Therefore, as in the first embodiment, a moderate cushioning performance can be provided, and a comfortable sitting comfort can be provided for a long time. . Third Embodiment (FIGS. 6 and 7) The third embodiment shown in FIGS. 6 and 7 is also applied to the seat 2 of the chair. Base body 5 of seat outer member 4
Has a strength not to be elastically deformed by a metal plate or the like. The base body 5 includes a base 5a, a foot 5b, and an overhang 5c, and is fastened to the upper end of the leg 1 with a bolt 12. In addition, screw holes 26 for fixing a pair of left and right inclined mounting pieces 24 a of the auxiliary support 24 with screws 25 are formed on the upper surface of the base body 5 at a position near the free end of the overhang portion 5 c. ing.

As can be clearly understood from FIG. 6, the auxiliary support 24 of the outer member 4 for the seat is provided with the inner member for the seat.
It is formed in a substantially rectangular frame shape in plan view so as to overlap with 27, and a mounting piece 24a extending obliquely inward as viewed from the front is integrally formed on the inner edge of the front and rear halfway portion of the left and right side portions 24b. . In the present embodiment, the mounting piece 24 of the auxiliary support 24 is
"a" constitutes a deformation allowable portion.

The auxiliary support 24 is an inner member for a seat.
The length is set to be longer than the base body 5 so that 27 can be supported in a wide range from front to back. The left and right sides 24b of the auxiliary support 24 and the inner member 27 for the seat are fixed with screws 28 ', so that the screw insertion holes 28 and the screw holes 29 are spaced at appropriate intervals in the front-rear direction. I have. The auxiliary support 24 and the seat inner member 27 are configured to be elastically deformable. Also, a large number of slits 30 for adjusting elasticity are formed in the seat inner member 27 as in the first embodiment.

In this embodiment, when the load W of the occupant acts on the inner member 27 for the seat portion, the projecting portion 5c of the base member 5 in the outer member 4 for the seat portion does not bend, but The mounting piece 24a elastically bends and deforms, so that the seat inner member 27 moves down as a whole, and the seat inner member 27 bends and deforms upwardly concave so that the center side thereof is greatly lowered.

As a result, even if the thickness of the cushion body 9 is small, the whole seat portion 2 can give a soft feeling to a seated person, and comfortable cushioning performance can be provided. . Fourth Embodiment (FIGS. 8 to 9) In a fourth embodiment shown in FIGS. 8 and 9, the present invention is applied to the back part 3, and the back outer member 3a has a base body 3a 'having a large area. And a pair of left and right auxiliary supports 32.

The base body 3a 'may be made of a metal material such as an aluminum die-cast product or a glass reinforced synthetic resin (F) made by impregnating an epoxy resin or a polypropylene resin into glass fibers.
RP) or the like, and has a rigid structure that is hardly elastically deformed. On the other hand, left and right auxiliary support 32
The back inner member 8 is made of nylon resin, polypropylene resin or glass reinforced synthetic resin (FRP) in which each of the above resins is impregnated into a glass fiber mat. It is in a state of being a quantity.

Base body 3 in back outer member 3a
A plurality of hook-shaped locking claws 33 project from the front surface of the left and right sides of a '. The left and right auxiliary supports 32 are symmetrical, and these auxiliary supports 32 are outer pieces overlapping the base body 3a '.
The upper and lower inner pieces 32b for mounting the right and left sides of the inner member 8 for the back part are formed in a substantially U shape (or a V shape) in plan view as a whole. Outer piece
At 32a, a mounting hole 34 is formed in which the locking claw 33 is fitted.

In the present embodiment, the entire auxiliary support 32 is a deformation permitting portion. In the inner piece 32b of the auxiliary support 32,
A U-shaped locking piece 35 facing outward in a plan view is provided at a plurality of locations along the vertical direction. The locking piece 35 has an inward U-shaped folded portion 36 provided on the left and right sides of the back inner member 8.
Can be fitted from both left and right outer sides. In addition, on both left and right sides of the inner member 8 for the back, protruding restricting pieces 37 facing the respective folded portions 36 are provided.
A projection 38 is formed to engage with a fall-off prevention hole (not shown) formed in the U-shaped locking piece 35 of the auxiliary support 32.

In the present embodiment, the back inner member 8 is divided into a plurality of upper and lower portions, each of which is formed in a horizontally long band plate shape as shown in FIG. The inner member may have such a form. Although not shown, the back inner member 8 may be formed as a single body, and the folded portions 36 and the regulating pieces 37 may be provided on both left and right sides at appropriate intervals vertically.

A cushion 9 made of a soft urethane foam resin or the like is stretched on the surface of the inner member 8 for the back, and the edge of the covering material 10 covering the surface of the cushion 9 is attached to the auxiliary support 32. May be wound so as to cover the outer peripheral surface of the front body 10, and the edge of the front body 10 may be fixed with the locking claws 33 so as not to be able to come off. In this embodiment, when a seated person leans on the back 3, the back inner member 8 is elastically deformed so as to bend in a forwardly concave shape in plan view, and the left and right auxiliary support members 32 are formed by the inner pieces 32 thereof.
It is elastically deformed so as to reduce the interval between the outer piece 32b and the outer piece 32a, so that the entire back 3 sinks (retreats) backward.
For this reason, the back 3 fits the human body.

Therefore, even if the thickness of the cushion material 9 stretched on the back inner member 8 is thin, the back 3 gives a soft touch to a seated person, and the overall cushioning performance of the back 3 is improved. A comfortable locking state can be provided. As a modified example in which the present invention is applied to the back portion 3 of the chair, a folded portion 36 that can be bent and deformed in the front-rear direction is integrally formed on both left and right sides of the inner member 8 for the back portion. The base 3a 'may be fixed to the inner surface of the right and left sides of the base 3a' (in this case, the auxiliary support 32 is not required).

[0040] Fifth Embodiment (FIGS. 10 to 23) FIGS. 10 to 23 show a fifth embodiment. 10 is a right side view of the chair, FIG. 11 is a cross-sectional plan view taken along the line II-II of FIG. 10, and FIG.
FIG. 10 is a sectional view taken along the line XII-XXI of FIG. 10, and first, a rough structure of the chair will be described based on these drawings. The chair includes a leg 1, a seat receiver 40, a seat 2, and a back 3. Leg 1
Has a gas cylinder (leg support) 42 covered with a cover 41. The seat receiver 40 is fixed to the upper end of the gas cylinder 42.

The seat 2 is composed of an outer member 43 for the seat, an inner member 44 for the seat, and a cushion member 45 for the seat. The outer member 43 for the seat has a base body 46 made of a metal plate. ing. Front bracket 46a provided on this base body 46
Is attached to the front portion of the seat receiver 40 by a first shaft 47 extending in the left-right direction. On the other hand, the back portion 3 is attached to a pair of left and right arms 48 extending obliquely upward from the rear portion of the seat receiver 40, and the front end of the arm 48 has a second shaft extending in the left and right direction.
49 are attached to the left and right side surfaces of the seat receiver 40.
An intermediate portion of the arm 48 and a rear bracket piece 46b provided at the rear end of the base member 46 of the outer member 43 for the seat portion are rotatably connected by a third shaft 50 extending in the left-right direction.

A joint 51 made of a pipe or a rod is inserted into the arm 48 from the rear, and the back 3 is attached to the arm 48 via the joint 51. As briefly shown in FIG. 11, the left and right joints 51 are connected by a horizontal bar 52. A bearing hole 53 formed in the seat receiving body 40 for fitting the first shaft 47 is an elongated hole extending substantially in the front-rear direction (a bush 54 is inserted into the bearing hole 53), and the first shaft 47 is provided. 47 is supported by a locking spring 55. Therefore, when a person sitting on the chair leans on the back 3, the back 3 tilts backward about the second shaft 49 against the spring 55, and the seat 2 retreats against the spring 55. While tilting backward about the first shaft 47 at a gentle angle.

As shown by the chain line in FIG. 10, the chair is provided with an armrest 56, but the description is omitted because it is not related to the present invention. Further, as shown in FIG. 11, the seat receiving body 40 is provided with a posture switching mechanism 57 for the back part 3. The attitude switching mechanism
57 is a state in which the back part 3 is tilted rearward, a first locked state held in an upright state, a second locked state held in a state tilted about half backward, and a state in which the back part 3 is fully tilted rearward. Can be switched to the third locked state held in the second embodiment, but the detailed description thereof is omitted since it is not directly related to the present invention.

In FIG. 11, reference numeral 58 denotes an auxiliary rubber for locking, and reference numeral 59 denotes a gas cylinder.
It is a lever for operating 42. {Seat Outer Member 43} Next, the structure of the seat outer member 43 of the seat 2 will be described mainly with reference to FIGS. 13 is a cross-sectional view taken along the line XIII-XIII of FIG. 10, FIG. 14 is an exploded front view of the seat 2, FIG. 15 is a perspective view of a base 46 constituting the outer member 43 for the seat, and FIG. 17 is an exploded perspective view of the member 43, FIG. 17 (A) is a plan view of the auxiliary support body 61 in the seat outer member 43, FIG. 17 (B) is a bottom view, and FIG.
FIG. 18 is a partially enlarged view of FIG.

The seat outer member 43 of the seat 2 is composed of one base body 46 made of a metal plate and a pair of left and right auxiliary supports 61 attached to the base body 46. For example, as shown in FIG. 12, the base body 46 is formed in a substantially H shape in plan view having left and right overhangs 46c. The overhang portion 46c is formed in a substantially trapezoidal shape narrowing toward the tip. Also,
The overhang portion 46c is gently inclined obliquely upward in a front view (in order to leave a large space below the seat inner member 44).

The base body 46 is formed with a recess (a downwardly bulging portion) 62 similar to a planar shape for the purpose of increasing strength, and the auxiliary support 61 is fixed to the recess 62. Screw holes 63 are available. Outer member for seat 43
The auxiliary support 61 is formed in a bag shape so as to fit into the overhang portion 46c of the base body 46. For example, as shown in FIG. 16, FIG. 17, and FIG. 18, the lower surface portion of the auxiliary support body 61 is largely hollowed out to avoid interference with the recess 62 of the base body 46 (the hollowed-out portion is denoted by reference numeral). 64). A screw insertion hole 65 is provided in the upper surface of the auxiliary support 61.

The auxiliary support 61 is manufactured by an injection molding method using a synthetic resin such as polypropylene.
At the edge of the auxiliary support 61, an eave-shaped support portion 61a overlapping with the side edge of the seat inner member 44 is formed. For this reason, the front end of the auxiliary support 61 has a V-shape in a front view. In the support portion 61a of the auxiliary support 61, rectangular locking holes 67 are formed at three positions, that is, at the front and rear ends and at the intermediate portion. The locking hole 67 is for mounting the seat inner member 44. The number and shape of the locking holes 67 can be freely set as needed.

The left and right end portions of the auxiliary support 61 are set so as to become thinner toward the end so that they can be elastically deformed to some extent. Further, the distal end portion of the auxiliary support body 61 can be bent and deformed to some extent so that the V-shaped interval is reduced. As shown in FIGS. 17A and 17C, a pair of ribs 68 and 69 are formed on the inner surface of the distal end portion of the auxiliary support 61 so as to sandwich the locking holes 67 on both the front and rear sides. The ribs 68 and 69 prevent the root portion of the support portion 61a from being excessively bent and deformed. As can be easily understood from FIG. 17 (C), the ribs 69 located outside are made to protrude more than the ribs 68 located inside the front and rear.

Therefore, the supporting portion 61a of the auxiliary supporting member 61 hardly bends at the front and rear portions thereof. For this reason, even if a person inserts his / her finger between the auxiliary support 61 and the seat inner member 44 for some reason, the finger does not get hurt. When the auxiliary support 61 is formed in a bag shape as in the embodiment, the strength can be improved. In addition, since the mounting screw 70 is hidden, even if a person accidentally touches the lower surface of the auxiliary support 61, the screw 70 does not cause injury.

{Seat Inner Member 44} Next, the structure of the seat inner member 44 will be described mainly with reference to FIGS. 19A is a partial cross-sectional view of the seat inner member 44 and the auxiliary support 61, FIG. 19B is a front view of a modification, FIG.
21 is a plan view of the seat inner member 44, FIG. 21 is a right side view of FIG. 20, FIG. 22 is a sectional view taken along line XXII-XXII of FIG. 21, and FIG. 23 is a bottom view of the seat inner member 44.

The seat inner member 44 is manufactured by an injection molding method using a synthetic resin such as polypropylene as a material. The seat inner member 44 is substantially plate-shaped, but is curved in accordance with the contours of the human buttocks and thighs. On each of the left and right sides of the inner member 44 for the seat portion, three locking claws 71 project downward. When the locking claws 71 are strongly pushed from above into the locking holes 67 of the auxiliary support body 61, they are fitted into the locking holes 67 by being deformed against elasticity,
Thus, the seat inner member 44 is attached to the auxiliary support 21 in one touch.

As shown in FIG. 19 and FIG. 21, the front surface of the front locking claw 71 and the rear surface of the rear locking claw 71 are used to guide the engagement of the locking claw 71 into the locking holes 67. An inclined rib 72 is provided. As the guide means for fitting the locking claw 71, FIG.
As shown in (5), the entire side surface 71a of the locking claw 71 may be inclined. As in the present embodiment and other embodiments, as a means for fixing the seat inner member 44 and the seat outer member 43, an engaging means including a locking claw 71 and a locking hole 67 is employed. There is an advantage that assembly is easy.

For example, as clearly shown in FIG.
There are open slots 73 at appropriate intervals.
This is to prevent the resin from shrinking during molding and the accuracy from deteriorating by equalizing the thickness of the locking claws 71. As shown in FIGS. 20 to 22, a front reinforcing rib 74 extending in the left-right direction is formed on the lower surface of the front portion of the seat inner member 44 in order to make the front portion difficult to deform. A large number of slots 73 are also formed at appropriate positions at the front reinforcing ribs 74.

On the lower surface of the front portion of the inner member 44 for the seat portion, an auxiliary rib 75 extending in a state of being connected to the reinforcing rib 74 is provided on the front side of the front reinforcing rib 74. The front auxiliary ribs 75 are used to align the edges of a cloth (upholstery) 76 covering the cushioning material 45 for the seat portion (the auxiliary ribs).
Attach the edge of the cutter (not shown) to the base of 75,
In that state, move the cutter along the auxiliary rib 75,
Trim the edges of the cloth 76).

For example, as shown in FIGS. 20 and 22, a rear reinforcing rib 77 is formed on the rear end edge of the seat inner member 44. For this reason, the rear end edge of the seat inner member 44 is hardly elastically deformed. A number of slots 73 are also formed at the rear reinforcing ribs 77. In the seat inner member 44, a center slit group 78 located at a position along the center line, a side slit group 79 located closer to the left and right sides, and a main slit group 80 disposed therebetween are formed are doing. The figure
In FIG. 14, the seat inner member 44 is shown in a simplified manner, and the slit groups 78, 79, and 80 are not shown.

Center slit group 78 and side slit group
Numeral 79 includes a large number of unit slits 81 extending in the front-rear direction, and a plurality of rows of unit slits 81 arranged in series in a row are arranged in the left-right direction. The unit slits 18 in adjacent rows are shifted in the front-rear direction. Main slit group 80
Are inclined so as to extend diagonally forward from the center line of the inner member 44 for the seat portion (curved with a gentle curvature convexly toward the diagonally rear). Therefore, the center slit group 78 and the main slit group 80
It has a relationship like a human spine and ribs.

The side slit group 79 includes front and rear reinforcing ribs 68, 77.
It is formed so as to extend to a location between the two. On the other hand,
The center slit group 78 is formed so as to be biased toward the rear. Each unit slit 82 constituting the main slit group 80
Are aligned so that their left and right outer ends are lined up in a straight line. Some of these unit slits 82 located closer to the front than the front part of the center slit group 78 have a shorter length extending toward the center toward the front. For this reason, a substantially triangular blank portion having no slit is left in front of the center slit group 78.

Some of the unit slits 82 constituting the main slit group 80, which are located at the rear, have shorter lengths toward the rear end. Around the part of the inner member 44 for the seat that the human hip bone hits (enclosed by a dotted line in FIG. 20,
In FIG. 23, a portion surrounded by a solid line) is made thinner than other portions (see also FIG. 18) to form an easily deformable zone 83 that can be more easily elastically deformed. Each unit slit 81,8
The two ends are rounded at both ends,
This is to prevent breakage due to stress concentration.

Since the unit slits 81 forming the center slit group 78 and the side slit group 96 extend in the front-rear direction, when a person sits on the unit slit 81, the center slit group 78 and the side slit group 79 are extended in the left-right direction. Elastically deform. In addition, the portion of the main slit group 80 is deformed so as to expand mainly in a direction orthogonal to the unit slit 82.

Due to the difference between the structure and the wall thickness of the slit groups 78, 79, 80, the seat inner member 44 is elastically deformed so as to sink more as the human ischium hits, and the thigh hits. The part does not deform much. For this reason, the body pressure of the person is evenly dispersed and supported by the seat inner member 44. In other words, a person does not feel pressure on a specific part. Therefore, it is possible to continue sitting comfortably for a long time.

By the way, when a person sits on a chair, the front and rear positions of the body may be different, such as sitting deeply or shallowly. In this regard, in the embodiment, since the easily deformable zone 83 extends in the front-rear direction, the same feeling of fit can be obtained even when the seating position is different. As shown in FIG. 23, a reinforcing rib 84 is provided around each unit slit 81 forming the center slit group 78 and the side slit group 79. Also, the main slit group 80
A reinforcing rib 84 is also provided at a part of each of the unit slits 82 constituting the above. When the reinforcing ribs 84 are provided in this manner, the groove widths of the unit slits 81 and 82 can be prevented from being excessively widened, so that breakage of the seat inner member 44 can be prevented. A high fit can be obtained by intensively deforming the dents.

Center slit group 78 and side slit group
The reason why the reinforcing ribs 84 are provided in all the unit slits 81 constituting the unit 79 is that these unit slits 81 extend in the front-rear direction, so that they are greatly spread in the left-right direction due to seating of a person and easily deformed. . . Others The present invention provides a bed 86 shown in FIG. 24 (A) and a stretcher shown in FIG. 24 (B).
87 and so on. Reference numeral 88 denotes a slit.

The present invention can be embodied in various forms other than the illustrated form. For example, the outer member may be made of a synthetic resin, and the edge may be formed in a V-shape or a U-shape so that the edge is flexibly deformed. Also,
The back inner member may have a slit structure like the seat inner member in the fifth embodiment. In addition, Japanese Patent Publication No. 8-22250 discloses that a slit is formed in an inner member of a chair, but in this case, an inner member for a seat portion and an inner member for a back portion are integrally continuous. In the case where it is formed, a slit is formed in the connecting portion of both to allow the back inner member to tilt backward, which is different from that for sinking the human body as in the present invention. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair.

FIG. 2 is a perspective view of a chair.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a front sectional view of a main part.

FIG. 5 is a cross-sectional view of the second embodiment.

FIG. 6 is an exploded perspective view of a third embodiment.

FIG. 7 is a sectional view of a third embodiment.

FIG. 8 is a plan sectional view of a fourth embodiment applied to a back.

FIG. 9 is an exploded perspective view of the fourth embodiment.

FIG. 10 is a perspective view of a chair according to a fifth embodiment.

11 is a plan sectional view taken along the line XI-XI of FIG. 10;

FIG. 12 is a sectional view taken along the line XII-XII of FIG. 10;

13 is a plan sectional view taken along the line XIII-XIII of FIG. 10;

FIG. 14 is an isolated front view of a seat.

FIG. 15 is a perspective view of a base body in the seat outer member.

FIG. 16 is an exploded perspective view of the seat outer member.

FIG. 17 is a view showing an auxiliary support in the outer member for the seat.

18 is a partially enlarged view of FIG.

FIG. 19 is a diagram illustrating fixing means for fixing the inner member and the outer member.

FIG. 20 is a plan view of the seat inner member.

FIG. 21 is a right side view of FIG. 20.

FIG. 22 is a sectional view taken along the line XXII-XXII of FIG. 20.

FIG. 23 is a bottom view of the seat inner member.

FIG. 24 is a diagram illustrating another example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leg part 2 Seat part 3 Back part 3a Outer member for back 4 Outer member for seat 5 Base body 5c Overhang 7,27 Inner member for seat 8 Inner member for back 9 Cushion material 11,24 Auxiliary support 43 seat Outer member for section 44 Inner member for seat part 45 Cushion material 46 Base body 46a Overhanging part 61 Auxiliary support 61a Supporting part 78 Center slit group 79 Side slit group 80 Main slit group 81,82 Unit slit 84 Reinforcement rib

Claims (4)

[Claims] An inner member formed of a synthetic resin in a plate shape so as to be able to bend and deform when a body pressing force acts thereon, and an outer member for supporting the inner member in a state where both ends are supported. The inner member and the outer member are fixed at their edges, and at least one of the side portions of the two members is formed into a shape that is folded back into a V-shaped or U-shaped cross section, or both are V-shaped. A chair or the like, characterized in that the inner member is fixed in a U-shape or U-shape to form a deformation permitting portion that allows the inner member as a whole to move closer to the outer member by the pressing force of the body. Body support. 2. An inner member formed of a synthetic resin in a plate shape so as to be able to bend and deform when a body pressing force acts thereon, and an outer member for supporting the inner member in a state where both ends are supported. A chair in which an inner member and an outer member are fixed at an edge thereof, and the inner member is formed with a number of slits that bend and deform more largely as the body pressing force acts more strongly. Etc. body support device. 3. The outer member includes a metal base body having left and right overhangs extending toward left and right side edges of the inner member, and a pair of left and right synthetic resins attached to the overhangs of the base body. The auxiliary support is made to have a strength capable of flexing and deforming by the pressing force of the body acting via the inner member, thereby forming the auxiliary support as the deformation permitting portion. The body support device such as a chair according to claim 1 or 2, wherein: 4. The auxiliary support of the outer member is formed in a bag shape so as to be fitted to the projecting portion of the base body from the left and right outer sides, and the inner member is fixed to the leading edge of the auxiliary support. The body supporting device such as a chair according to claim 3, wherein the body supporting device is used.