JP3529646B2 - Chair - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to chair child.

[0002]

BACKGROUND OF THE INVENTION chair child, are generally to have a cushioning property in its seat and back. The most common method of providing cushioning properties is to put a thick cushion material such as sponge or urethane foam on the substrate of the seat or back.

However, since the cushion material is worn out during use, it is difficult to secure a comfortable sitting comfort only with the cushion material.

Therefore, it is considered to improve the cushioning property. As an example thereof, in Japanese Utility Model Laid-Open No. 4-118059, the back of the chair is composed of an inner member stretched with a cushion material and an outer member supporting the inner member from the rear, and the outer member is rearward. It is disclosed that it is made of a synthetic resin excellent in flexibility so that it can be flexibly deformed toward the front.

Further, in Japanese Unexamined Patent Publication No. 9-182643, 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 structure in which the inner members are compressed and deformed against the elasticity of the peripheral wall.

[0006]

According to Japanese Utility Model Laid-Open No. 4-118059, only the rocking function of the back portion is ensured by utilizing the elastic deformation of the outer member, and the back portion and the seat portion are fixed to the human body. Can not be said to fit. Therefore, there is a limit to improving the sitting comfort.

On the other hand, in the case of Japanese Unexamined Patent Publication No. 9-182643, the inner member is easily bent and deformed, so
It is considered that the sitting comfort can be improved compared to the 8059 publication. However, the method disclosed in Japanese Patent Application Laid-Open No. 9-182643 has a problem that it is difficult to manufacture the inner member in a hollow shape with high accuracy, and that the inner member becomes thick as a whole.

An object of the present invention is to provide a chair that solves these problems.

[0009]

Means for Solving the Problems] Each To achieve the above object
It has the structure of the claim. Of these, in the invention of claim 1, the chair
The child can bend and deform due to the pressing force of a person sitting
Inner member for seat, made of synthetic resin in a plate shape
And a base placed below the seat inner member
A body, and the seat inner part is attached to the base body.
-Fix the auxiliary support that both left and right edges of the member attach,
Or, it is integrally formed on both left and right sides of the seat inner member.
Fixing the folded part that is made diagonally downward when viewed from the front
Support the inner member for the seat at both ends when viewed from the front.
Support the state of.

Then, the auxiliary support or folded portion
Is allowed to bend and deform due to the pressing force of the seated person.
It is composed of a support part, and this deformation allowance support part is
From the attachment to the base body to the left and right outside
Is formed.

In the present invention , as a basic constitution, the chair is
Synthesized so that it can be flexibly deformed by the pressing force of a person sitting
An inner member formed in a plate shape by a resin, and a outer <br/> over member for the seat for supporting the <br/> inner member for the seat in the state of supported at both ends, these seat use the inner member and the seat
The outer member for the section at its edge, and
The inner member for the seat portion is provided with a large number of slit groups that are bent and deformed to a greater extent in a region where the pressing force of the body acts strongly.
Is forming.

The group of slits is an inner seat portion.
-To extend along the longitudinal centerline of the member
Formed center slit group and the center slit
Left and right main slit group formed on the left and right outer side of the group,
Sides formed outside the left and right main slits
It is composed of a lit group and a center slit group and
Each slit that constitutes the side slit group is long in the front-back direction.
Each slit that is extended to form a main slit group
Extend in a direction inclined with respect to the center.

According to a third aspect of the present invention , in the chair having the same basic structure as the second aspect, the back surface of the inner member for a seat is provided with the
Reinforcing ribs that surround part of the slit group are protruding downward.
It

According to a fourth aspect, in the first aspect, the
The base body is made of metal plate, and the base body is
With left and right overhanging parts that extend toward the left and right side edges of the knurling member
Are one, the auxiliary support by a synthetic resin, from the left and right outside projecting portion of the base over <br/> scan body is formed into a bag shape so as to fit the tip end of the auxiliary support in-<br/> toner member for the seat that secure the.

According to the chair of claim 5, the seated person leans against the chair.
Made of synthetic resin so that it can be flexibly deformed by pressing force due to
Inner member for the back formed in a plate shape and
And a base body arranged behind the inner member.
The left and right sides of the back inner member on the base body.
Secure the auxiliary support to which the edge is attached, or the back part
Folds formed integrally on both left and right sides of the inner member for
By fixing the back part, the back inner member can be
Both ends are visually supported.

Then, the auxiliary support or folded portion
Is flexed by the pressing force of the leaning person
It is composed of a deformable support part that only deforms.
From the mounting part to the base body, see the support part on the left
It is formed so as to extend toward the right outside.

[0017]

In the structure of claim 1, a person wears
When the pressing force due to the sitting acts on the inner member for a seat, the inner member for a seat flexes and deforms,
Deformable support portion is elastically deformed, the inner member for the seat is displaced so as to approach the base body as a whole. That is, the inner seat member has a tendency to sink as a whole under the load of the body, and flexibly deforms to fit the outer surface of the body.

Therefore, even if the cushion member is not stretched on the seat inner member or the cushion is thin, high cushion performance can be ensured. In addition, since the inner member and the base body are separate bodies, the inner member and the base body can be manufactured with higher accuracy than in the case where they are formed in a hollow shape.

Further, it becomes possible to prevent the film from becoming thick and to give a sharp appearance.

On the other hand, according to the second aspect, the seat portion is formed.
The inner member itself can be flexibly deformed according to the pressing force of the body. That is, it is possible to elastically deform the portion where the person 's ischbone abuts, so that the seat inner member can be fitted to the body.

In other words, the pressing force (body pressure) of the body is applied to the seat portion.
The inner member can be supported evenly over a wide area. In other words, the pressure exerted on the body as a reaction from sitting can be evenly distributed, thus preventing or significantly reducing the pressure on certain parts of the body and keeping the body comfortable. Can be supported by.

Therefore, also in claim 2, high cushioning performance can be ensured even if the cushion is not stretched on the seat inner member or the cushion is thin. You can do it.

Further, since the inner member and the outer member are separate members, they can be manufactured with higher accuracy than when they are formed in a hollow shape, and further, a sharp appearance is avoided by avoiding thickening. It is also possible to adopt a form in which is added.

According to the third aspect, the unit slip is
The groove width of the gutter can be prevented from being excessively widened by the load.
Therefore, it is possible to prevent the inner member for the seat from breaking.
It Further, according to the embodiment, the easy-to-deform zone is set.
It is possible to obtain a high fit by intensively deforming the dents.
Wear.

Further, according to the present invention, it is possible to easily and firmly attach the auxiliary supporting body, and when fixing the auxiliary supporting body to the base body, avoid exposing the screw. There is also an advantage that it is possible to do.
In claim 5, the seated person leans back,
The same effect as that of claim 1 is achieved.

[0026]

Embodiments of the present invention will now 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, of which FIGS. 1 and 2 are perspective views of the chair and FIG.
Is a separated perspective view of a main part, and FIG. 4 is a front sectional view of the main part.

The chair has a leg portion 1 with casters 1a, a seat portion 2 supported by the leg portion 1, and a back portion 3. The seat 2 includes a seat outer member 4 and a seat inner member 7 arranged above the seat outer member 4. The back 3 includes a back outer member 3a and a back inner member 8 arranged in front of the outer member 3a.

The back outer member 3a is attached via the backrest support 6 protruding rearward from the seat outer member 4 or is formed integrally with the seat outer member 4. On the surfaces of the inner member 7 for the seat portion and the inner member 8 for the back portion, a cushion body 9 made of a soft foam resin (soft urethane foam or the like) having a small thickness is attached, and the surface of the cushion body 9 is made of a cloth (cover cloth). ) 10 is preferred.

The outer member 3a for the back portion is made of glass reinforced synthetic resin (FRP) in which glass fibers are impregnated with epoxy resin or polypropylene resin, etc., and has a structure having rigidity that is not easily elastically deformed.

On the other hand, the seat inner member 7 and the back inner member 8 are made of nylon resin, polypropylene resin,
Alternatively, it is made of a synthetic resin such as glass reinforced synthetic resin (FRP) in which a glass fiber mat is impregnated with each of the above resins, and has a structure (shape / thickness) capable of obtaining an appropriate amount of elastic deformation under a predetermined load. ing.

Details of the seat portion 2 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 a state of being turned upside down.

The seat outer member 4 is composed of one base body 5 and a pair of left and right auxiliary supports 11. The base body 5, or the Al Mida Ikast products and the like made of metal,
A rigid structure that is not easily elastically deformed is manufactured by thickly manufacturing a hard synthetic resin such as glass reinforced synthetic resin (FRP) in which glass fiber is impregnated with epoxy resin or polypropylene resin.

The base body 5 of the outer member 4 for the seat portion 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 left and right outer sides of the base portion 5a. It is composed of a projecting portion 5c which is integrally projected obliquely upward, and the left and right mounting foot pieces 5b are fixed to the upper ends of the legs 1 with bolts 12. Reference numeral 13 is 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 seated person.

The auxiliary support 11 of the seat outer member 4 is
As shown in FIG. 3 and FIG. 4, it is formed in a substantially horizontal V-shape or a horizontal U-shape in a front view. Therefore, the auxiliary support body 11 serves as a deformation permitting support portion that moves the seat inner member 7 downward as a whole when a person sits down.

On the lower end side of the auxiliary support body 11, a mounting hole 16 for screwing a bolt 15 into a screw hole 14 formed in the projecting portion 5c of the base body 5 is formed. The length in the front-rear direction of the upper piece 11a in both auxiliary supports 11 is set longer than the length in the front-rear direction of the outer seat member 4 so that both left and right sides of the inner seat member 7 can be supported over a wide range. Has been done.

[0038] The upper piece 11a of the auxiliary support 11 is bored a rectangular locking hole 18 in which a pair of engaging claws 17 protruding from the lower surface of the seat portion inner member 7 is fitted.

As shown in FIG. 4, the auxiliary support 11 is fixed to the left and right overhanging portions 5c of the base body 5 with bolts 15.
After fixing the auxiliary support body 11 to the base body 5, by fitting the auxiliary support body 11 into the locking holes 18 of the left and right auxiliary support bodies 11 against the elasticity of the locking claws 17 of the inner member 7, the inner member 7 and the auxiliary support body are supported. It fixes the body 11 and.

In this case, the covering 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 covering material 10 is not required.

In the above structure, a person sits down and the load W
When acting on the seat inner member 7, the upper piece 11a of the auxiliary support 11 of the seat outer member 4 approaches the projecting portion 5c of the base 5 as shown by the two-dot chain line in FIG. Elastically deformed, in other words, the auxiliary support 11
Inclination angle is so wrinkles seen deformed smaller. At the same time, a seat inner member 7 viewed deformed flexures so as to curve upward concave.

As described above, even if the thickness of the cushion body 9 is thin, due to the bending deformation of the left and right auxiliary supports 11 and the bending deformation of the inner seat member 7 as a whole, the entire seat portion 2 has an appropriate amount. Since it sinks, it is possible to give a seated person a soft feeling that the entire seat portion 2 fits, and as a result, a comfortable cushioning performance can be provided.

[0043] In particular, as shown in FIG. 3, the left form form a plurality of slits 20 at positions and in the vicinity thereof buttocks of the seated person hits of the seat for the inner member 7, the slit 20
Since the elasticity performance (the amount of bending per unit load) of the seat inner member 7 becomes softer (larger) than the other parts at and near the point, the seated person relieves the feeling of pressure on the hips, It is possible to provide a comfortable chair with higher cushioning performance.

This slit 20 is used for the inner member 7 for the seat.
If it is 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.

.. In the second embodiment (FIG. 5) FIG. 5 shows a second embodiment. In this embodiment, the folded-back portions 21b extending obliquely inward are integrally provided on the left and right side edges of the main body portion 21a of the inner seat member 21 so that the left and right side edges of the inner seat member 21 are separated. It is a deformation permitting support part having a V-shaped cross section (may be U-shaped).

As with the first embodiment, the seat inner member 21 is also made of a material such as glass fiber reinforced plastic having an appropriate amount of elastic deformation under a predetermined load, which is elastically deformable. Since the folded-back portion 21b is fixed to the base body 5 in a cantilevered state, the seat inner member 21 as a whole descends when a person sits down.

The base body 5 of the seat outer member 4 has the same rigid structure as that of the first embodiment. On the upper surface of the protruding portion 5c of the base body 5 near the free end, a plurality of pairs of locking claws 22 are projected at appropriate intervals in the front-rear direction of the chair.
It has been set. On the other hand, the left and right folded portions 21b of the inner member 21 for the seat portion are provided with a plurality of locking holes 23, such as square holes, into which the locking claws 22 fit and engage, along the front-rear direction. .

A cushion body 9 having a small thickness is attached or placed on the upper surface of the main body portion 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. There is.

Also in this second embodiment, when the load W of the seated person acts on the main body portion 21a of the seat inner member 21, the projecting portion of the base body 5 in the seat outer member 4 is extended.
5c does not bend, and the folded-back portion 21b of the seat inner member 21
Is elastically deformed so that the angle formed with the main body portion 21a is narrowed (narrowed), the entire inner member 21 for the seat portion is sunk, and the main body portion 21a is elastically bent upward in a concave shape so that the central portion thereof is largely sunk. It deforms (see the two-dot chain line state in FIG. 5).

Therefore, similarly to the first embodiment, it is possible to provide an appropriate cushioning performance and a comfortable sitting comfort for a long time.

.. In the third embodiment (FIGS. 6 and 7) Figures 6 and 7 show a third embodiment. This practice
In the form, the base body 5 of the seat outer member 4 has a strength such that it is not elastically deformed by a metal plate or the like. The base body 5 is composed of a base portion 5a, a leg piece 5b, and an overhang portion 5c, and is fastened to the upper end of the leg portion 1 with a bolt 12. Further, screw holes 26 for fixing the pair of left and right inclined mounting pieces 24a of the auxiliary support body 24 with screws 25 are formed in the upper surface of the base body 5 near the free ends of the overhanging portions 5c. ing.

As can be clearly understood from FIG. 6, the auxiliary support member 24 of the outer seat member 4 is an inner seat member.
It is formed in a substantially rectangular frame shape in a plan view so as to overlap 27, and mounting pieces 24a that extend obliquely inward in a front view are integrally formed at the inner edges of the front and rear intermediate portions of the left and right side portions 24b. . In this embodiment, the attachment piece 24 of the auxiliary support 24 is
a constitutes a deformation permitting support portion.

The auxiliary support 24 is an inner member for a seat.
The front and rear lengths are set to be longer than the base body 5 so that the front and rear 27 can be supported in a wide range. Since both the left and right side portions 24b of the auxiliary support 24 and the seat inner member 27 are fixed by screws 28 ', the screw insertion holes 28 and the screw holes 29 are formed at appropriate intervals along the front-rear direction. There is.

The auxiliary support 24 and the seat inner member 27 are elastically deformable. Further, the seat inner member 27 is provided with a large number of slits 30 for adjusting elasticity, as in the first embodiment.

In this embodiment, when the load W of the seated person acts on the seat inner member 27, the projecting portion 5c of the base body 5 of the seat outer member 4 does not bend, but the auxiliary support 24 mounting piece 24a is to look deformed flexures, with the seat for the inner member 27 is moved downward movement as a whole, for the seat inner member 27 is resiliently deformed upwardly concave so that the center-side sink large.

As a result, even if the thickness of the cushion body 9 is thin, the seat 2 can give a soft feeling to the seated person, and comfortable cushioning performance can be provided.

.. Fourth Embodiment (FIGS. 8 to 9) FIG. 8 and FIG. 9 show a fourth embodiment corresponding to claim 5.
It is applied to the back in the form. Outer member for back 3a
Is a large-area base body 3a 'and a pair of left and right auxiliary supports 32a.
And consists of.

The base body 3a 'is made of a metal material such as an aluminum die cast product, or a glass reinforced synthetic resin (F
For example, it is made of synthetic resin such as RP) and has a structure that is not easily elastically deformed and has rigidity.

On the other hand, the left and right auxiliary supports 32 and the back inner member 8 are made of nylon resin, polypropylene resin, or glass reinforced synthetic resin (FRP) obtained by impregnating each of the above resins into a glass fiber mat. By the load of, the elastic deformation amount becomes an appropriate amount.

Base body 3 in outer member 3a for back
A plurality of hook-shaped locking claws 33 are provided on the front surfaces of the left and right sides of a'in a plan view. The left and right auxiliary supports 32 have a symmetrical shape, and these auxiliary supports 32 are outer pieces that overlap the base body 3a '.
The upper and lower inner pieces 32b for mounting the left and right side portions of the back inner member 8 are formed in a generally U-shape (or V-shape) in plan view as a whole. Outer piece
A mounting hole 34 into which the locking claw 33 is fitted and fitted is formed in 32a.

In this embodiment, the entire auxiliary support 32 serves as a deformation permitting support portion.

On the inner piece 32b of the auxiliary support 32, locking pieces 35, which are U-shaped outward in plan view, are provided at a plurality of positions along the vertical direction. Inward U-shaped folded-back portions 36 provided on the left and right sides of the back inner member 8 can be fitted into the locking pieces 35 from the left and right outer sides. Also, the back inner member 8
On both left and right sides of each, there are projecting restricting pieces 37 facing the respective folded-back parts 36. Each restricting piece 37 has an auxiliary support member.
The U-shaped locking piece 35 of 32 is provided with a protrusion 38 which engages with a drop-out preventing hole (not shown) formed therein.

In this embodiment, the back inner member 8 is divided into a plurality of upper and lower parts, each of which is formed in a laterally elongated strip plate shape as shown in FIG. The inner member may have such a form. Although not shown, the back inner member 8 may have a single-body structure, and the folded-back portions 36 and the restriction pieces 37 may be provided vertically at appropriate intervals on both left and right sides thereof.

A cushion body 9 such as a soft urethane foam resin is stretched on the surface side of the inner member 8 for the back portion, and the edge of the covering material 10 covering the surface of the cushion body 9 is attached to the auxiliary support 32. It may be wound so as to cover the outer peripheral surface of, and the edge portion of the cover 10 may be fixed by the locking claws 33 so as not to come off.

In this embodiment, the seated person is the back 3
When leaning against the back, the inner member 8 for the back part elastically deforms in a state of bending in a forward concave shape in a plan view, and the left and right auxiliary supports
32 is elastically deformed so as to reduce the distance between the inner piece 32b and the outer piece 32a, and the entire back portion 3 is depressed (retracted) rearward. Therefore, the back part 3 fits the human body.

Therefore, even if the cushion material 9 stretched on the back inner member 8 is thin, the seat 3 gives a soft feeling to the back 3 and the cushion performance of the back 3 is improved. A comfortable locking state can be given.

As a modified example in which the present invention is applied to the back part 3 of a chair, folded-back parts 36 which can be flexibly deformed in the front-rear direction are integrally formed on the left and right sides of the back inner member 8.
This may be fixed to the inner surfaces of the left and right side portions of the base body 3a 'of the back outer member 3a (in this case, the auxiliary support 32 is not necessary).

.. Fifth Embodiment (FIGS. 10 to 23) FIGS. 10 to 23 show the fifth embodiment. 10 is a right side view of the chair, FIG. 11 is a sectional view taken along the line II-II of FIG. 10, and FIG.
It is XII-XXI sectional drawing of 10, and the rough structure of a chair is first demonstrated based on these figures.

The chair includes a leg portion 1, a seat receiving body 40, a seat portion 2, and
And a back 3. The leg 1 includes a gas cylinder (leg support) 42 covered with a cover 41. Gas cylinder 42
A seat receiving body 40 is fixed to the upper end of the.

The seat 2 is composed of a seat outer member 43, a seat inner member 44, and a seat cushion member 45. The seat outer member 43 includes 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 receiving body 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 receiving body 40, and the front end of the arm 48 is provided with a second shaft 49 extending in the left and right direction. It is installed on the left and right side of the. The middle portion of the arm 48 and the rear bracket piece 46b provided at the rear end of the base body 46 of the seat outer member 43 are rotatably connected by a third shaft 50 extending in the left-right direction.

A joint 51 made of a pipe or a bar is inserted into the arm 48 from the rear side, and the back portion 3 is attached to the arm 48 via the joint 51. 11, the left and right joints 51 are connected by a horizontal horizontal bar 52.

The bearing hole 53 formed in the seat receiving body 40 for fitting the first shaft 47 is a long hole extending substantially in the front-rear direction (the bush 54 is inserted into the bearing hole 53), and
The first shaft 47 is supported by a locking spring 55. Therefore, when a person seated on a chair leans on the back portion 3, the back portion 3 tilts backward about the second shaft 49 against the spring 55, and the seat portion 2 moves backward against the spring 55. First while doing
It tilts backward about the axis 47 at a gentle angle.

As shown by the alternate long and short dash line in FIG. 10, the chair is provided with an elbow pad 56, but since it is not related to the present invention, its explanation is omitted. Further, as shown in FIG. 11, the seat receiving body 40 is provided with a posture switching mechanism 57 for the back portion 3.

The posture switching mechanism 57 includes a free state in which the back portion 3 can be tilted backward, a first locked state in which the back portion 3 is held in an upright state, and a second locked state in which the back portion 3 is held in a state in which the back portion 3 is tilted about half. Although it is possible to switch to the third locked state in which the state is fully tilted backward, the detailed description thereof is omitted because it is not directly related to the present invention.

In FIG. 11, reference numeral 58 is an auxiliary rubber for locking, and reference numeral 59 is a gas cylinder.
It is a lever for operating the 42.

[0077] Outer member for «seat 43» now be described with reference to the structure of the seat for the outer member 43 of the seat 2 mainly in FIGS. 13 to 18. Figure 13 shows XIII-XI in Figure 10.
II sectional view, FIG. 14 is a separated front view of the seat portion 2, FIG. 15 is a perspective view of a base body 46 that constitutes the seat portion outer member 43, and FIG. 16 is a separated perspective view of the seat portion outer member 43. (A) of 17 is a plan view of the auxiliary support 61 in the seat outer member 43,
(B) is a bottom view, (C) is a sectional view taken along line CC of (A), and Fig. 18 is Fig. 13
FIG.

The seat outer member 43 of the seat 2 is composed of one base member 46 made of a metal plate and a pair of left and right auxiliary support members 61 attached to the base member 46. For example, as shown in FIG. 12, the base body 46 is formed in a substantially H shape in a plan view having left and right overhanging portions 46c. The overhanging portion 46c is formed in a substantially trapezoidal shape that narrows toward the tip. Also,
The projecting portion 46c is slanted obliquely upwardly and gently when viewed from the front (to open a large space below the seat inner member 44).

The base body 46 is formed with a depression (downward bulging portion) 62 similar to the planar shape, mainly for the purpose of increasing the strength, and the auxiliary support body 61 is fixed to the depression 62. There is a screw hole 63 for.

The auxiliary support 61 of the seat outer member 43 is
It is formed in a bag shape so as to fit into the overhanging 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 gouged in order to avoid interference with the recess 62 of the base body 46. 64). Further, the screw insertion hole 65 is formed on the upper surface of the auxiliary support 61.
Is vacant.

The auxiliary support 61 is manufactured by an injection molding method using a synthetic resin such as polypropylene as a raw material.

At the end edge of the auxiliary support 61, an eave-shaped support portion 61a that overlaps the side edge of the seat inner member 44 is formed. Therefore, the front end portion of the auxiliary support body 61 is V-shaped when viewed from the front. Square-shaped locking holes 67 are formed at three positions of the front and rear ends and the intermediate part of the support part 61a of the auxiliary support 61.
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 tip portions of the auxiliary support 61 are set so that the wall thickness becomes thinner toward the tip so that they can be elastically deformed to some extent. Further, the tip portion of the auxiliary support body 61 can be flexibly deformed to some extent so that the V-shaped space is narrowed.

As shown in FIGS. 17A and 17C, the auxiliary support 61
A pair of ribs 68, 69 are formed on the inner surface of the tip of the so as to sandwich the locking holes 67 on the front and rear sides. This rib 68,69
This prevents the root portion of the support portion 61a from excessively bending and deforming. Then, as can be easily understood from FIG. 17 (C), the ribs 69 located on the outer side are more largely projected than the ribs 68 located on the front and rear inner side.

Therefore, the supporting portion 61a of the auxiliary supporting member 61 is hardly bent and deformed at the front and rear sides thereof. Therefore, even if a person inserts a finger between the auxiliary support 61 and the seat inner member 44 for some reason, the finger is not pinched and injured.

When the auxiliary support 61 is formed in a bag shape as in this embodiment , its strength can be improved. Further, since the mounting screw 70 is hidden, even if a person accidentally touches the lower surface of the auxiliary support 61 with his / her hand, the screw 70 does not cause injury.

<< Inner Member 44 for Seat Section >> Next, the structure of the inner member 44 for seat section will be described mainly with reference to FIGS. 19 to 23. In FIG. 19, (A) is a partial cross-sectional view of the seat inner member 44 and the auxiliary support 61, (B) is a front view of a modified example, FIG. 20 is a plan view of the seat inner member 44, and FIG.
20 is a right side view of FIG. 20, FIG. 22 is a sectional view taken along line XXII-XXII of FIG. 21,
FIG. 23 is a bottom view of the seat inner member 44.

The seat inner member 44 is manufactured by injection molding using a synthetic resin such as polypropylene as a material. The seat inner member 44 has a substantially plate shape, but is curved according to the outer shapes of a person's buttocks and thighs.

On both left and right sides of the seat inner member 44,
Three locking claws 71 are provided so as to project downward. Locking claw
When the seat 71 is strongly pushed into the locking hole 67 of the auxiliary support 61 from above, it is deformed against elasticity and fits into the locking hole 67. As a result, the seat inner member 44 is fixed to the auxiliary support 61. It can be attached to 21 with one touch.

As shown in FIGS. 19 and 21, in order to guide the fitting of the locking claw 71 into the locking hole 67 between the front surface of the locking claw 71 at the front end and the rear surface of the locking claw 71 at the rear end. Inclined ribs 72 are provided. As the fitting guide means for the locking claw 71, see FIG.
As shown in, the entire side surface 71a of the locking claw 71 may be inclined.

As in the present embodiment and other embodiments, as the means for fixing the seat inner member 44 and the seat outer member 43, the engaging means composed of the engaging claw 71 and the engaging hole 67 is used. If adopted, there is an advantage that the assembly can be done easily.

For example, as clearly shown in FIG. 19, each locking claw 71
Upward slots 73 are formed at appropriate intervals at the point.
This is to prevent the resin from shrinking at the time of molding and deteriorating the accuracy by equalizing the wall thicknesses 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 it difficult to deform the front portion. There is. A large number of slots 73 are also formed at appropriate intervals at the front reinforcing ribs 74.

On the lower surface of the front portion of the seat inner member 44, 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 for aligning the edges of the cloth (covering material) 76 covering the seat cushion material 45 (auxiliary ribs).
Apply the blade of a cutter (not shown) to the base of 75,
In that state, move the cutter along the auxiliary rib 75,
Trim the edges of Cross 76).

For example, as shown in FIGS. 20 and 22, a rear reinforcing rib 77 is formed at the rear end edge of the seat inner member 44. Therefore, the rear end edge of the seat inner member 44 is hardly elastically deformed. A large number of slots 73 are also formed in the rear reinforcing ribs 77.

The seat inner member 44 has a center slit group 78 located along the center line, a side slit group 79 located near the left and right sides, and a main slit group 80 arranged between the center slit group 78 and the side slit group 79. And form. In FIG. 14, the seat inner member 44 is shown in a simplified manner, and the slit groups 78, 79, 80 are not shown.

Center slit group 78 and side slit group
79 is composed of 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 line are juxtaposed in the left-right direction. The unit slits 18 in adjacent rows are displaced in the front-back direction.

The unit slits 82 constituting the main slit group 80 are inclined so as to extend obliquely forward from the center line of the seat inner member 44 (curved with a gentle curvature convex obliquely rearward). Exist). Therefore, the center slit group 78 and the main slit group 80 have a relationship like a person's spine and ribs.

The side slit group 79 includes front and rear reinforcing ribs 68, 77.
It is formed in a state where it is extended to a place between the two. On the other hand,
The center slit group 78 is formed in a state of being biased to the rear part. Each unit slit 82 that constitutes the main slit group 80
Are aligned so that their left and right outer ends are linearly arranged.

Among the unit slits 82, some of the unit slits 82 located on the front side of the front portion of the center slit group 78 have a length that extends toward the center portion toward the front. For this reason, on the front side of the center slit group 78, a substantially triangular blank portion where no slit exists is left.

Some of the unit slits 82 constituting the main slit group 80 located at the rear part have shorter lengths toward the rear end.

By making the periphery of the portion of the inner member 44 for the seat portion on which the person's ischbone abuts (the portion surrounded by the dotted line in FIG. 20 and the solid line in FIG. 23) thinner than other portions (see FIG. (See also 18), which is a deformable zone 83 that can be elastically deformed more easily. Both ends of each unit slit 81, 82 have a rounded shape in order to prevent breakage due to stress concentration.

Since the unit slits 81 constituting the center slit group 78 and the side slit group 96 extend in the front-rear direction, when a person sits down, the positions of the center slit group 78 and the side slit groups 79 should spread in the left-right direction. Elastically deforms. Further, at the location of the main slit group 80, the main slit group 80 is deformed so as to spread mainly in the direction orthogonal to the unit slit 82.

Due to the structure of the slit groups 78, 79, 80 and the difference in wall thickness, the inner member 44 for the seat portion is elastically deformed so that the portion where the seat bone of the person hits is largely depressed, and the thigh hits. The part does not change much. Therefore, 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 a feeling of pressure on a particular part. Therefore, it is possible to comfortably continue sitting for a long time.

By the way, when a person sits down on a chair, the front and back positions of the body may be different, such as sitting deeply or shallowly. In this respect, in the present embodiment , since the easily deformable zone 83 extends in the front-rear direction, the same fit feeling can be obtained even if the sitting position is different.

As shown in FIG. 23, the center slit group 78
Reinforcing ribs 84 are provided around each unit slit 81 constituting the side slit group 79. Reinforcing ribs 84 are also provided in some of the unit slits 82 that form the main slit group 80. By providing the reinforcing ribs 84 in this way, it is possible to prevent the groove widths of the unit slits 81 and 82 from being excessively widened, so that it is possible to prevent breakage of the inner member 44 for the seat portion, and the easy-to-deform zone 83. It is possible to obtain a high fit by intensively deforming the dents.

Center slit group 78 and side slit group
The reason why the reinforcing ribs 84 are provided on all the unit slits 81 constituting 79 is that these unit slits 81 extend in the front-rear direction, and thus are easily expanded and deformed greatly in the left-right direction when seated by a person. .

.. Others The present invention can be embodied in various forms other than the illustrated form. For example, the outer member may be made of synthetic resin, and the edge portion may be formed into a V shape or a U shape so that the edge portion is flexibly deformed. The back inner member may have a slit structure like the seat inner member in the fourth embodiment.

[0109] Note that the Tokuoyake flat 8-22250 publication, it is disclosed that forms a slit in the inner member of the chair, this one, the inner member and the back portion inner member for seat integrally When formed in a continuous state,
A slit is formed at the connecting portion of the inner member for the back part to allow the rearward tilting of the inner member, which is different from that for sinking the human body as in the present invention.

[Brief description of 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 sectional view of a 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 the back.

FIG. 9 is an exploded perspective view of a 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.

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

13 is a plan sectional view taken along the line XIII-XIII in FIG.

FIG. 14 is a separated front view of a seat portion.

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

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

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

FIG. 18 is a partially enlarged view of FIG.

FIG. 19 is a view showing a fixing means for the inner member and the outer member.

FIG. 20 is a plan view of an inner member for a seat portion.

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

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

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

[Explanation of symbols]

1 leg 2 seats 3 back 3a Outer member for back 4 Outer member for seat 5 base body 5c Overhang part 7,27 Seat inner member 8 Inner member for back 9 cushion material 11,24 Auxiliary support 43 Seat outer member 44 Inner member for seat 45 cushion material 46 base body 46a Overhang part 61 Auxiliary support 61a Support part 78 Center slit group 79 Side slit group 80 main slits 81,82 unit slit 84 Reinforcing rib

Claims (5)

(57) [Claims] 1. A flexural deformation caused by a pressing force applied by a person sitting
Seat inner made of synthetic resin in a plate shape to obtain
Member and the base member located below the seat inner member.
And a left and right edge portions of the inner member for the seat portion on the base body.
Fix the auxiliary support that is attached to the
Front view diagonally formed integrally on the left and right sides of the inner member
By fixing the downward folding part,
Support the corner member so that it is supported at both ends when viewed from the front.
A chair that is seated on the auxiliary support or the folded-back portion.
It is a deformation permitting support part that bends and deforms due to
Attach the deformable support part to the base body when viewed from the front.
A chair that is formed so as to extend from the neck to the left and right . 2. A bending deformation caused by a pressing force of a person sitting
An inner member for a seat which is formed in a plate shape by a synthetic resin to obtain, comprises an outer member for a seat for supporting the inner member for the seat in the state of supported at both ends, these seat
The inner member for seat and the outer member for seat are fixed at their edges, and the inner member for seat is formed with a large number of slit groups that are bent and deformed to a greater extent in the region where the pressing force of the body is stronger. In the chair, the slit group is the front-rear length of the seat inner member.
Centers formed to extend along the centerline of the hand
It is formed on the left and right outer sides of the lit group and the center slit group.
Left and right main slit groups and left and right main slit groups
Side slits formed on the left and right outer sides of
Center slit group and side slit group.
Each slit is long in the front-back direction and
Each slit constituting the slit group is tilted with respect to the center.
A chair that extends in a slanted direction . 3. A bending deformation caused by a pressing force applied by a person sitting
Seat inner made of synthetic resin in a plate shape to obtain
Member and the inner member for the seat with both ends supported.
And an outer member for a seat to be held.
The inner member for the seat and the outer member for the seat at the edges.
The inner member for the seat, and
The portion where the pressing force of is strongly applied causes a large bending deformation.
A chair having a large number of slit groups, wherein one of the slit groups is formed on the back surface of the inner seat member.
A chair with a reinforcing rib that surrounds the part protruding downward . 4. The base body is made of a metal plate.
The body extends toward the left and right side edges of the seat inner member.
While the left and right overhangs are provided, the auxiliary support is a synthetic
The resin, from the left and right outside projecting portion of the base over the scan body is formed into a bag shape so as to fit the, that secure the inner member for the seat portion to the distal end edge of the auxiliary support, wherein The chair described in item 1. 5. Pressed by a seated person leaning back
Made of synthetic resin in a plate shape so that it can be flexibly deformed by force
Inner member for back and rear of this inner member for back
And a base body arranged in The left and right edges of the inner member for the back are provided on the base body.
Fix the auxiliary support that is attached to the
Folded parts that are integrally formed on both left and right sides of the inner member
To fix the back inner member to a plan view.
A chair that is supported in a state of supporting both ends, The leaning of a person who has seated the auxiliary support or the folded portion.
Deformation allowance support that bends and deforms due to pressing force due to hanging
This deformation allowance support part is
From the attachment to the base body to the left and right outside
Forming like Chair.