Technical Field
[0001] The present invention relates to a chair in which an attachment part of an upholstery
material of a load-supporting body, such as a seat body or a backrest, is improved.
Background Art
[0002] In seat bodies of chairs used for office work, generally, a cushion material, such
as urethane, is arranged at an upper part of a base plate constituting a framework,
and is covered with a sheet-like upholstery material from an outside surface of the
cushion material to an outside edge of the base plate.
[0003] When the upholstery material of this type of chair is attached, it is easy to replace
the upholstery material with another at the time of fouling or the like, and it is
easy to apply stable tension throughout the upholstery material. Therefore, a technique
of narrowing a peripheral edge of the upholstery material on a lower surface side
of the base plate using a tightening cord, thereby fixing the upholstery material
to the cushion material and the base plate is frequently used (for example, refer
to Patent Documents 1 and 2).
[0004] In the chair described in Patent Documents 1 and 2, a bag-shaped insertion hole
is provided in the peripheral edge of the upholstery material that holds the outside
surface of the cushion material, and the outer peripheral edge of a base plate, the
tightening cord is inserted through the insertion hole, and end parts of the tightening
cord are tied together on the lower surface side of the base plate. A locking projection
that restricts the displacement of the tightening cord to a base plate center side
is provided on a lower surface side of such a chair, and thereby, positional deviation
of the upholstery material is prevented.
[0005] In such a chair, the upholstery material can be easily attached to the cushion material
and the base plate by tightening the tightening cord in the shape of a loop on the
lower surface side of the base plate and tying the end parts. Moreover, variations
in the tension that acts on the upholstery material can be reduced by managing the
length of the tied part of the tightening cord.
Citation List
Patent Document
[0006]
[Patent Document 1] Japanese Patent Publication No. 3728576
[Patent Document 2] Japanese Patent Publication No. 4255670
Further combinations are disclosed in document
DE19535181A1 or document
FR2481907A1 that do not provide easy secure attachment of the upholstery material.
Summary of Invention
Technical Problem
[0007] In the chair described in Patent Documents 1 and 2, the locking projection is formed
only in a direction in which the tightening cord that tends to narrow inward is caught.
However, actually, if the upholstery material is stretched on the cushion material
and the base plate, it becomes clear that the peripheral edge of the upholstery material
tightened by the tightening cord is displaced not only in a direction in which the
peripheral edge tends to narrow inward but also in a direction in which the peripheral
edge tends to widen outward.
[0008] As the cause of this, for example, if the peripheral edge of the upholstery material
is tightened by the tightening cord in a case where the base plate and the cushion
material have a substantially rectangular shape in plan view, parts corresponding
to vicinities of corner parts of the base plate or the cushion material on the peripheral
edge of the upholstery material are most strongly pulled by the tightening cord. However,
by the parts corresponding to vicinities of linear parts between the corner parts
adjacent to each other on the peripheral edge of the upholstery material, pulling
force becomes relatively weak. Therefore, it is predicted that the parts are displaced
to partially widen outward due to the tension of the upholstery material.
[0009] Thus, an object of the invention is to provide a chair that can appropriately restrict
displacement of a tightening cord and a peripheral edge of an upholstery material
and can reduce positional deviation of an upholstery material.
Solution to Problem
[0010] In order to solve the above problems, a chair related to the invention includes a
load-supporting body. The load-supporting body includes a base plate constituting
a framework; a cushion material arranged on a front surface side of the base plate;
an upholstery material stretched to cover at least an outside surface of the cushion
material and an outer peripheral edge of the base plate; and a tightening cord inserted
through a peripheral edge of the upholstery material and tightened to allow end parts
to be tied together on a rear surface side of the base plate in a state in which the
upholstery material has covered the outside surface of the cushion material and the
outer peripheral edge of the base plate. The base plate is provided with first locking
means for restricting displacement of the tightened tightening cord in a base-plate
center direction, and second locking means for restricting displacement of the tightened
tightening cord in a base plate outward direction.
[0011] Accordingly, if the tightening cord inserted through the peripheral edge of the upholstery
material is tightened on the rear surface side of the base plate in a state in which
the upholstery material has covered the outside surface of the cushion material and
the outer peripheral edge of the base plate, the displacement of the tightening cord
in the base-plate center direction is restricted by the first locking means, and the
displacement of the tightening cord in the base plate outward direction is restricted
by the second locking means. Therefore, not only the displacement of the peripheral
edge of the upholstery material that tends to narrow inward but also the displacement
thereof that tends to widen outward is restricted.
[0012] The base plate may be formed in a substantially rectangular shape having corner parts
at four corners and linear parts between the corner parts, the corner parts may be
provided with the first locking means, and at least some of the linear parts may be
provided with the second locking means.
[0013] In this case, if the tightening cord inserted through the peripheral edge of the
upholstery material is tightened on the rear surface side of the base plate in a state
in which the upholstery material has covered the outside surface of the cushion material
and the outer peripheral edge of the base plate, the tightening cord tends to be displaced
in the direction of narrowing inward in the corner parts of the base plate, and the
upholstery material tends to be displaced in the direction of widening outward in
some of the linear parts of the base plate. In this case, each displacement of the
tightening cord is restricted by the first locking means and the second locking means.
Therefore, in every part of the base plate, curling of the upholstery material can
be appropriately prevented.
[0014] According to the invention, the first locking means include a first side wall protruding
from a rear surface of the base plate to a rear side, and a first protruding wall
protruding in an outward direction of the base plate from the vicinity of a protruding
end of the first side wall, and the second locking means may include a second side
wall protruding from the rear surface of the base plate to the rear side, and a second
protruding wall protruding in an inward direction of the base plate from the vicinity
of a protruding end of the second side wall.
[0015] In this case, slip-out of the tightening cord or the peripheral edge of the upholstery
material is reliably restricted by the first protruding wall and the second protruding
wall. Additionally, even in a case where the tightening cord or the peripheral edge
of the upholstery material directly abuts against neither the first protruding wall
nor the second protruding wall, the displacement of the tightening cord or the upholstery
material is restricted by the first side wall or the second side wall.
[0016] A recessed groove that is continuous in a circumferential direction of the base plate
is formed in the rear surface of the base plate, the first side wall is an inside
wall of the recessed groove, and the second side wall is an outside wall of the recessed
groove.
[0017] In this case, when the upholstery material is attached, the tightening cord or the
peripheral edge of the upholstery material can be arranged inside the first protruding
wall or the second protruding wall, pushing the tightening cord or the peripheral
edge of the upholstery material into the recessed groove that is continuous in the
peripheral direction of the base plate. Therefore, the upholstery material can be
easily attached. Additionally, since the tightening cord or the peripheral edge of
the upholstery material is arranged within the recessed groove that is continuous
in the circumferential direction of the base plate, the upholstery material is not
more easily curled.
[0018] According to the invention, the first protruding wall and the second protruding wall
is arranged so as to be separated from each other in a direction in which the tightening
cord extends, and to be adjacent to each other.
[0019] In this case, even if the length of the first protruding wall and the second protruding
wall is extended, the tip parts of the first protruding wall and the second protruding
wall are stopped from coming into contact with each other. For this reason, the length
of the first protruding wall and the second protruding wall can be sufficiently extended,
and when the tightening cord or the peripheral edge of the upholstery material is
attached, the first protruding wall and the second protruding wall can be easily bent
and deformed. Therefore, this can facilitate the attachment of the upholstery material.
[0020] It is preferable that respective tip parts of the first protruding wall and the second
protruding wall that are provided adjacent to each other extend to positions with
substantially half lengths of the separation width of the first side wall and the
second side wall in a direction intersecting the direction in which the tightening
cord extends.
[0021] In this case, since the wide range, in a slip-out direction, of a region where the
peripheral edge of the upholstery material and the tightening cord are arranged is
covered with the first protruding wall and the second protruding wall, slip-out of
the peripheral edge of the upholstery material can be effectively prevented. Additionally,
the work of putting the upholstery material between the first side wall and the second
side wall is not easily hindered by the first protruding wall and the second protruding
wall.
[0022] Tip parts of the first protruding wall and the second protruding wall may be arranged
at positions that face each other.
[0023] In this case, since the tip parts of the first protruding wall and the second protruding
wall are arranged to face each other, even if the displacement direction of the tightening
cord or the peripheral edge of the upholstery material varies, the displacement of
the tightening cord or the peripheral edge of the upholstery material is reliably
restricted by any one of the first protruding wall and the second protruding wall.
[0024] Portions of tip parts of the first protruding wall and the second protruding wall
may be arranged to face each other, and remaining portions thereof may be arranged
so as to be separated from each other in a direction in which the tightening cord
extends.
[0025] In this case, even if the displacement direction of the tightening cord or the peripheral
edge of the upholstery material varies, the displacement of the tightening cord or
the peripheral edge of the upholstery material is reliably restricted by any one of
the first protruding wall and the second protruding wall. Additionally, since only
the portions of the tip parts of the first protruding wall and the second protruding
wall face each other, and the remaining portions thereof are separated from each other
in the direction in which the tightening cord extends, the first protruding wall and
the second protruding wall extend to be long along the direction in which the tightening
cord extends. For this reason, the first protruding wall and the second protruding
wall can be easily bent and deformed when the tightening cord or the peripheral edge
of the upholstery material is attached. Therefore, this can facilitate the attachment
of the upholstery material.
Advantageous Effects of Invention
[0026] According to the invention, since not only the displacement of the peripheral edge
of the upholstery material that tends to narrow inward but also the displacement thereof
that tends to widen outward can be appropriately restricted, positional deviation
of the upholstery material can be more reliably suppressed.
Brief Description of Drawings
[0027]
FIG. 1 is a side view of a chair of a first embodiment of the invention.
FIG. 2 is a perspective view in a state in which a leg part of the chair of the first
embodiment of the invention is removed.
FIG. 3 is a bottom view of a base plate of the first embodiment of the invention.
FIG. 4 is a perspective view when the base plate of the first embodiment of the invention
is seen from a lower, diagonally front and left side.
FIG. 5 is an enlarged view of a V portion, in FIG. 3, of a seat body of the first
embodiment of the invention.
FIG. 6 is a sectional view, corresponding to section VI-VI of FIG. 3, of the seat
body of the first embodiment of the invention.
FIG. 7 is a sectional view, corresponding to section VII-VII of FIG. 3, of the seat
body of the first embodiment of the invention.
FIG. 8 is a bottom view of main parts of a base plate of a second embodiment of the
invention.
FIG. 9 is a bottom view of main parts of a base plate of a third embodiment.
FIG. 10 is a bottom view of main parts of a base plate of a fourth embodiment of the
invention.
Description of Embodiments
[0028] Hereinafter, embodiments will be described with reference to the drawings. In addition,
in the following description, a direction in which the front of a human being who
sits down in a regular posture on a chair faces and which is indicated by arrow FR
in the drawings is referred to as "front", and a direction opposite to the front is
referred to as "rear". Additionally, as for "up", "down", "left", and "right", a direction
indicated by arrow UP in the drawings on the upper side of the human being who sits
down in the regular posture on the chair is referred to as "up", and a direction opposite
thereto is referred to as "down", and a direction indicated by arrow LH in the drawings
on the left of the human being who sits down in the regular posture on the chair 1
is referred to as "left", and a direction opposite thereto is referred to as "right".
[0029] First, a first embodiment illustrated in FIGS. 1 to 7 will be described.
[0030] FIG. 1 is a side view illustrating the overall configuration of the chair 1 of this
embodiment, and FIG. 2 is a perspective view when the chair 1 from which some components
are removed is seen obliquely from below.
[0031] As illustrated in these drawings, the chair 1 of this embodiment includes a leg part
2 placed on a floor F, a box-like supporting base 3 installed at an upper end of the
leg part 2, a seat body 4 on which a sitting person sits down, a seat-receiving member
5 attached to an upper surface of the supporting base 3 to support the seat body 4,
and a backrest part 6 that extends to a rear part upper side from the supporting base
3 and supports the back of a sitting person who sits down on the seat body 4.
[0032] The leg part 2 includes a multi-branch leg 7 with casters 7a, and a leg pillar 8
that is erected from a central part of the multi-branch leg 7 and incorporates a gas
spring that is a lifting mechanism, and the supporting base 3 is attached to an upper
end part of the leg pillar 8 so as to be rotatable in a horizontal direction. A lift-adjusting
mechanism of the leg pillar 8 and a tilt-adjusting mechanism of the backrest part
6 are incorporated into the supporting base 3. The backrest part 6 includes a backrest-supporting
frame 9 having a substantially L-shape in a side view, and a backrest body 10 that
is attached to a front surface of a rear upper part of the backrest-supporting frame
9 and directly supports the back of a sitting person who sits down on the seat body
4, and a front lower end of the backrest-supporting frame 9 is coupled to the tilt-adjusting
mechanism within the supporting base 3.
[0033] In addition, reference signs 11 in FIGS. 1 and 2 designate a pivotal shaft of the
backrest-supporting frame 9 on the supporting base 3, and reference sign 12 designates
an operation knob of the tilt-adjusting mechanism provided to protrude from a side
surface of the supporting base 3. Additionally reference sign 90 in FIG. 1 designates
armrests attached to lower surfaces on both left and right sides of the seat body
4 as additional parts.
[0034] FIG. 3 is a bottom view of the seat body 4. In this embodiment, the seat body 4 constitutes
a load-supporting body of the chair 1 of this embodiment.
[0035] The seat body 4 includes a base plate 13 constituting a framework, a cushion material
14 made of urethane attached to an upper part of the base plate 13, and an upholstery
material 15 that is stretched to cover an outside surface of the cushion material
14 to an outer peripheral edge of the base plate 13. In addition, in FIG. 3, the upholstery
material 15 is illustrated by phantom lines for the sake of illustration.
[0036] FIG. 4 is a perspective view when the base plate 13 is seen obliquely from below.
[0037] The base plate 13 is formed of synthetic resin having elasticity, and is formed in
a substantially oblong shape with four rounded corners in a top view. That is, the
base plate 13 is provided with corner parts 13a that are rounded at four corners,
and has an external shape in which linear parts 13b are respectively arranged between
the corner parts 13a adjacent to each other. The base plate 13 is provided such that
a continuous shielding wall 16 serving as a reinforcing rib protrudes downward from
a lower surface of a peripheral edge excluding a central region of a rear side. The
shielding wall 16 conceals that a lower surface of the base plate 13 is seen from
a side, and functions to restrict excessive bending deformation of the whole region
of the base plate 13. Additionally a plurality of reinforcing ribs 23 with low protruding
height extending in a forward-rearward direction are provided at equal intervals so
as to protrude from a region closer to an inner side than the shielding wall 16 of
the lower surface of the base plate 13.
[0038] The base plate 13 is held by the seat-receiving member 5 fixed on the supporting
base 3 so as to be slidable forward and backward.
[0039] As illustrated in FIG. 2, a locking lever 21 for locking the front and rear positions
of the seat body 4 is tiltably attached to a left side part of the base plate 13.
A plurality of lock holes 35 are formed in the seat-receiving member 5, and the sliding
position of the base plate 13 is locked by a tip part of the locking lever 21 being
fitted into an arbitrary lock hole 35. A release operation knob 22 to be gripped by
an operator is integrally formed on a base end side in the locking lever 21.
[0040] FIG. 5 is an enlarged view illustrating a V portion of FIG. 3, and FIGS. 6 and 7
are views illustrating sections corresponding to a VI-VI section and a VII-VII section
of FIG. 3.
[0041] A bag-shaped insertion hole part 17 running along a circumferential direction is
provided at a peripheral edge 15a of the upholstery material 15 that is arranged so
as to be routed to a lower surface side of the peripheral edge of the base plate 13.
The insertion hole part 17 is broken at a portion of the peripheral edge 15a of the
upholstery material 15 in the circumferential direction, and a tightening cord 18
is inserted from the broken portion of the tightening cord 18. The tightening cord
18 tightens the peripheral edge 15a of the upholstery material 15 on the lower surface
side of the base plate 13, in a state in which the upholstery material 15 is stretched
to hold the outside surface of the cushion material 14 to the outer peripheral edge
of the base plate 13, and both end parts 18a and 18a are tied together with a predetermined
tension in that state.
[0042] Here, a recessed groove 19 running along the circumferential direction is formed
in the lower surface of the outer peripheral edge of the base plate 13, and the peripheral
edge 15a of the upholstery material 15 is fitted into the recessed groove 19 together
with the tightening cord 18.
[0043] The recessed groove 19 is formed by a first annular side wall 24 that protrudes downward
from the lower surface of the base plate 13, and a second annular side wall 25 that
protrudes downward from the lower surface of the base plate 13 at a position separated
to the outside of the first side wall 24. In this embodiment, a portion of the first
side wall 24 is formed continuously with a root side of the shielding wall 16. In
other words, the shielding wall 16 is formed continuously with a protruding end of
the first side wall 24.
[0044] A plurality of first protruding walls 26 that protrude in an outward direction of
the base plate 13 from the vicinity of the protruding end of the first side wall 24
are provided in regions corresponding to the respective corner parts 13a of the base
plate 13 of the first side wall 24, and regions corresponding to the linear parts
13b. Meanwhile, a plurality of second protruding walls 27 that protrude in an inward
direction of the base plate 13 from the vicinity of a protruding end of the second
side wall 25 are provided in regions corresponding to the linear parts 13b on both
left and right sides of the base plate 13 and the linear part 13b on the front side
thereof, in the second side wall 25.
[0045] In this embodiment, the first side wall 24 and the first protruding wall 26 constitute
first locking means for restricting the displacement of the tightened tightening cord
18 in a base-plate center direction, and the second side wall 25 and the second protruding
wall 27 constitute second locking means for restricting the displacement of the tightened
tightening cord 18 in the outward direction of the base plate.
[0046] The first protruding wall 26 and the second protruding wall 27 provided in the regions
corresponding to the linear parts 13b on both left and right sides and the linear
part 13b on the front side are arranged so as to be separated from each other by a
predetermined distance in a direction in which (the tightening cord 18 of) the recessed
groove 19 extends, and to be adjacent to each other. That is, the first protruding
wall 26 and the second protruding wall 27 are alternately arranged with the recessed
groove 19 interposed therebetween.
[0047] Regarding the first protruding wall 26 and the second protruding wall 27 that are
provided to be adjacent to each other in the regions corresponding to the linear parts
13b on both left and right sides and the linear part 13b on the front side, as illustrated
in FIG. 5, their respective tip parts extend to positions with substantially half
lengths of the groove width of the recessed groove 19.
[0048] In the chair 1 of this embodiment, in a case where the cushion material 14 is arranged
on the base plate 13 and the upholstery material 15 is attached thereto, first, the
upholstery material 15 is covered to hold the outside surface of the cushion material
14 and the outer peripheral edge of the base plate 13, and the peripheral edge 15a
of the upholstery material 15 is fitted into the recessed groove 19 of the base plate
13 together with the tightening cord 18 on the lower surface side of the base plate
13. In this case, in the respective corner parts 13a and the linear part 13b on a
rear side, the tightening cord 18 and the peripheral edge 15a of the upholstery material
15 ride over only the first protruding wall 26 and are pushed into the recessed groove
19. Meanwhile, in the linear parts 13b on both left and right sides and the linear
part 13b on the front side, the first protruding wall 26 and the second protruding
wall 27 ride over the tightening cord 18 and the peripheral edge 15a of the upholstery
material 15 and are pushed into the recessed groove 19.
[0049] Next, in this state, both end parts of the tightening cord 18 pulled out from the
insertion hole part 17 of the peripheral edge of the upholstery material 15 are tightened
using an appropriate instrument, and both the end parts of the tightening cord 18
are tied together in that state. In addition, the tightening of the tightening cord
18 can also be manually performed by a worker. In this way, if both the end parts
of the tightening cord 18 are tightened, the tightening cord 18 and the peripheral
edge 15a of the upholstery material 15 tend to be displaced in a base-material center
direction in the regions corresponding to the respective corner parts 13a of the base
plate 13 and the rear linear part 13b, and the tightening cord 18 and the peripheral
edge 15a of the upholstery material 15 tend to be displaced in a base material outward
direction in some of the regions corresponding to the linear parts 13b on both the
left and right sides of the base plate 13 and the linear part 13b on the front side,
and tend to be displaced in the base-material center direction in some of the other
above regions. In this case, the displacement, in the base-plate center direction,
of the tightening cord 18 and the peripheral edge 15a of the upholstery material 15
is restricted by the first side wall 24 and the first protruding wall 26, and the
displacement, in the base plate outward direction, of the tightening cord 18 and the
peripheral edge 15a of the upholstery material 15 is restricted by the second side
wall 25 and the second protruding wall 27.
[0050] As described above, in the chair 1 related to this embodiment, the second side wall
25 and the second protruding wall 27 that are the second locking means in addition
to the first side wall 24 and the first protruding wall 26 that are the first locking
means are provided at suitable positions on the lower surface of the base plate 13
of the seat body 4. Therefore, not only the displacement of the peripheral edge 15a
of the upholstery material 15 that tends to narrow inward but also the displacement
thereof that tends to widen outward can be appropriately restricted. For this reason,
curling of the upholstery material 15 in various directions can be more reliably suppressed.
[0051] Particularly, in the chair 1 related to this embodiment, the second side wall 25
and the second protruding wall 27 are provided in the linear parts 13b on both the
left and right sides of the base plate 13 and the linear part 13b on the front side
in the thick cushion material 14 superimposed on an upper surface. Therefore, the
displacement of the peripheral edge 15a of the upholstery material 15 that tends to
widen outward accompanying the tightening of the tightening cord 18 can be appropriately
restricted.
[0052] Additionally, in the chair 1 related to this embodiment, the first locking means
is constituted of the first side wall 24 and the first protruding wall 26, and the
second locking means is constituted of the second side wall 25 and the second protruding
wall 27. Therefore, slip-out of the peripheral edge 15a of the upholstery material
15 from the recessed groove 19 can be reliably restricted by the first protruding
wall 26 and the second protruding wall 27. In addition, even in a case where the tightening
cord 18 or the peripheral edge 15a of the upholstery material 15 directly abuts against
neither the first protruding wall 26 nor the second protruding wall 27, the displacement
of the tightening cord 18 or the upholstery material 15 can be restricted by the first
side wall 24 and the second side wall 25 that are walls of the recessed groove 19.
[0053] Moreover, in the chair 1 related to this embodiment, the recessed groove 19 is provided
in the lower surface of the base plate 13 so as to be continuous in the circumferential
direction of the base plate 13, the first side wall 24 is constituted of an inside
wall of the recessed groove 19, and the second side wall 25 is constituted of an outside
wall of the recessed groove 19. Therefore, when the upholstery material 15 is attached,
the tightening cord 18 or the peripheral edge 15a of the upholstery material 15 can
be easily arranged inside the first protruding wall 26 or the second protruding wall
27, continuously pushing the tightening cord 18 or the peripheral edge 15a of the
upholstery material 15 into the recessed groove 19 on the base plate 13. For this
reason, the upholstery material 15 can be easily attached. Moreover, since the displacement
of the tightening cord 18 or the peripheral edge 15a of the upholstery material 15
is restricted within the continuous recessed groove 19, the curling of the upholstery
material 15 can be made less likely to occur.
[0054] However, the continuous recessed groove 19 may not necessarily be formed in the lower
surface of the base plate 13. As in a second embodiment illustrated in FIG. 8, the
first side wall 124 and the second side wall 125 that are narrow may intermittently
protrude from the lower surface of the base plate 113 so as to run along the direction
in which the tightening cord 18 extends, and the first protruding wall 126 and the
second protruding wall 127 may be respectively provided continuously with the vicinities
of the respective protruding ends of the first side wall 124 and the second side wall
125.
[0055] Additionally, in the chair 1 related to this embodiment, the first protruding wall
26 and the second protruding wall 27 provided in the linear parts 13b are arranged
so as to be separated from each other in the direction in which the tightening cord
18 extends, and to be adjacent to each other. Therefore, the length of the first protruding
wall 26 and the second protruding wall 27 can be sufficiently extended without causing
any contact between tip parts of the first protruding wall 26 and the second protruding
wall 27. For this reason, the first protruding wall 26 and the second protruding wall
27 can be easily bent and deformed when the tightening cord 18 or the peripheral edge
of the upholstery material 15 is attached. Therefore, this can facilitate the attachment
of the upholstery material 15.
[0056] Particularly, in the case of this embodiment, the respective tip parts of the first
protruding wall 26 and the second protruding wall 27 that are provided adjacent to
each other in the linear parts extend to positions with substantially half lengths
of the groove width (the separation width of the first side wall 24 and the second
side wall 25) of the recessed groove 19. Therefore, the wide range of the recessed
groove 19 is blocked by the first protruding wall 26 and the second protruding wall
27, and the slip-out of the peripheral edge 15a (tightening cord 18) of the upholstery
material 15 from the inside of the recessed groove 19 can be effectively prevented.
Additionally, as in this embodiment, even in a case where the respective tip parts
of the first protruding wall 26 and the second protruding wall 27 are extended to
the positions with substantially half lengths of the groove width of the recessed
groove 19, if minimal setting is made so that the tightening cord 18 can pass through
the recessed groove at least, the work of putting the peripheral edge 15a of the upholstery
material 15 into the recessed groove 19 is not hindered by the first protruding wall
26 and the second protruding wall 27.
[0057] FIG. 9 is a view illustrating lower surfaces of main parts of a base plate 213 of
a third embodiment.
[0058] In this embodiment, tip parts of a first protruding wall 226 and a second protruding
wall 227 provided in the linear parts are arranged at positions that face each other.
[0059] In the case of this embodiment, the tip parts of the first protruding wall 226 and
the second protruding wall 227 are arranged to face each other. Therefore, even if
the displacement direction of the tightening cord 18 or the peripheral edge 15a of
the upholstery material 15 varies, the displacement of the tightening cord 18 or the
peripheral edge 15a of the upholstery material 15 can be reliably restricted by any
one of the first protruding wall 226 and the second protruding wall 227.
[0060] FIG. 10 is a view illustrating lower surfaces of main parts of a base plate 313 of
a fourth embodiment of the invention.
[0061] In this embodiment, portions of tip parts of a first protruding wall 326 and a second
protruding wall 327 provided in the linear parts face each other, and remaining portions
thereof are arranged so as to be separated from each other in a direction in which
the tightening cord 18 extends.
[0062] In this embodiment, even if the displacement direction of the tightening cord 18
or the peripheral edge 15a of the upholstery material 15 varies, the displacement
of the tightening cord 18 or the peripheral edge 15a of the upholstery material 15
can be reliably restricted by any one of the first protruding wall 326 and the second
protruding wall 327.
[0063] Additionally, since only the portions of the tip parts of the first protruding wall
326 and the second protruding wall 327 face each other, and remaining portions thereof
are separated from each other in the direction in which the tightening cord 18 extends,
the first protruding wall 326 and the second protruding wall 327 extend to be long
along the direction in which the tightening cord 18 extends. For this reason, the
first protruding wall 326 and the second protruding wall 327 can be easily bent and
deformed when the tightening cord 18 or the peripheral edge 15a of the upholstery
material 15 is attached. For this reason, the attachment of the upholstery material
15 can be facilitated.
[0064] The invention is not restricted to the above embodiments, and various design changes
can be made. For example, although the above embodiments exemplify a load-supporting
body as a seat body, it is also possible to adopt the same structure for a backrest
body of the backrest part.
Industrial Applicability
[0065] According to the chair of the invention, since not only the displacement of the peripheral
edge of the upholstery material that tends to narrow inward but also the displacement
thereof that tends to widen outward can be appropriately restricted, positional deviation
of the upholstery material can be more reliably suppressed.
Reference Signs List
[0066]
- 1:
- CHAIR
- 4:
- SEAT BODY (LOAD-SUPPORTING BODY)
- 13, 113, 213, 313:
- BASE PLATE
- 14:
- CUSHION MATERIAL
- 15:
- UPHOLSTERY MATERIAL
- 18:
- TIGHTENING CORD
- 19:
- RECESSED GROOVE
- 24, 124:
- FIRST SIDE WALL
- 25, 125:
- SECOND SIDE WALL
- 26, 126, 226, 326:
- FIRST PROTRUDING WALL
- 27, 127, 227, 327:
- SECOND PROTRUDING WALL
1. A chair, comprising a load-supporting body, the load-supporting body including:
a base plate (13, 113, 213, 313) constituting a framework;
a cushion material (14) arranged on a front surface side of the base plate;
an upholstery material (15) stretched to cover at least an outside surface of the
cushion material and an outer peripheral edge of the base plate; and
a tightening cord (18) inserted through a peripheral edge of the upholstery material
and tightened to allow end parts to be tied together on a rear surface side of the
base plate in a state in which the upholstery material (15) has covered the outside
surface of the cushion material (14) and the outer peripheral edge of the base plate,
wherein the base plate (13, 113, 213, 313) is provided with first locking means for
restricting displacement of the tightened tightening cord (18) in a base-plate center
direction, and second locking means for restricting displacement of the tightened
tightening cord (18) in a base plate outward direction,
the first locking means includes a first side wall (24, 124) protruding from a rear
surface of the base plate to a rear side, and a first protruding wall (26, 126, 226,
326) protruding in an outward direction of the base plate from the vicinity of a protruding
end of the first side wall,
the second locking means includes a second side wall (25, 125) protruding from the
rear surface of the base plate to the rear side, and a second protruding wall (27,
127, 227, 327) protruding in an inward direction of the base plate from the vicinity
of a protruding end of the second side wall; and
the first protruding wall (24, 124) and the second protruding wall (25, 125) are arranged
so as to be separated from each other in a direction in which the tightening cord
(18) extends, and to be adjacent to each other
characterized in that:
a recessed groove (19) that is continuous in a circumferential direction of the base
plate is formed in the rear surface of the base plate, the first side wall (24, 124)
is an inside wall of the recessed groove (19), and the second side wall (25, 125)
is an outside wall of the recessed groove (19).
2. The chair according to Claim 1,
wherein the base plate (13, 113, 213, 313) is formed in a substantially rectangular
shape having corner parts at four corners and linear parts between the corner parts,
wherein the corner parts are provided with the first locking means, and
wherein at least some of the linear parts are provided with the second locking means.
3. The chair according to Claim 1,
wherein respective tip parts of the first protruding wall (26, 126, 226, 326) and
the second protruding wall (27, 127, 227, 327) that are provided adjacent to each
other extend to positions with substantially half lengths of the separation width
of the first side wall and the second side wall in a direction intersecting the direction
in which the tightening cord (18) extends.
4. The chair according to Claim 1,
wherein portions of tip parts of the first protruding wall (26, 126, 226, 326) and
the second protruding wall (27, 127, 227, 327) are arranged to face each other, and
remaining portions thereof are arranged so as to be separated from each other in a
direction in which the tightening cord (18) extends.
1. Ein Stuhl, umfassend einen lasttragenden Körper, wobei dieser lasttragende Körper
besteht aus:
einer Grundplatte (13, 113, 213, 313), die einen Rahmen bildet;
einem Kissenmaterial, (14), das an einer Vorderflächenseite der Grundplatte angeordnet
ist;
einem Polstermaterial (15), das so gespannt ist, dass mindestens eine Außenfläche
des Kissenmaterials und eine Außenumfangskante der Grundplatte bedeckt ist; und
einer Spannschnur (18), die durch eine Umfangskante des Polstermaterials eingezogen
und festgezogen wird, und es so ermöglicht, dass ihre Enden an einer hinteren Fläche
der Grundplatte zusammengebunden werden können, so dass das Polstermaterial (15) die
Außenfläche des Kissenmaterials (14) und die äußere Umfangskante der Grundplatte bedeckt,
wobei die Grundplatte (13, 113, 213, 313) mit einer ersten Verriegelungsvorrichtung,
um eine Verschiebung der gespannten Spannschnur (18) in Richtung des Zentrums der
Grundplatte zu beschränken und mit einer zweiten Verriegelungsvorrichtung versehen
ist, um eine Verschiebung der gespannten Spannschnur (18) in Außenrichtung der Grundplatte
zu beschränken,
wobei die erste Verriegelungsvorrichtung eine erste Seitenwand (24, 124), die von
einer rückwärtigen Fläche der Grundplatte zur Rückseite vorsteht, und eine erste vorstehende
Wand (26, 126, 226, 326), die in Außenrichtung der Grundplatte vorsteht, ausgehend
von nahe dem vorstehenden Ende der ersten Seitenwand umfasst,
wobei die zweite Verriegelungsvorrichtung eine zweite Seitenwand (25, 125), die von
einer rückwärtigen Fläche der Grundplatte zur Rückseite vorsteht und eine zweite vorstehende
Wand (27, 127, 227, 327), die in Innenrichtung der Grundplatte vorsteht, ausgehend
von nahe dem vorstehenden Ende der zweiten Seitenwand umfasst; und
wobei die erste vorstehende Wand (24, 124) und die zweite vorstehende Wand (25, 125)
so angeordnet sind, dass sie voneinander in der Richtung getrennt sind, in der die
Spannschnur (18) verläuft, und dass sie zueinander benachbart sind;
dadurch gekennzeichnet, dass:
eine eingelassene Nut (19), die durchgehend in Umfangsrichtung der Grundplatte verläuft,
in der rückwärtigen Fläche der Grundplatte vorgesehen ist, die erste Seitenwand (24,
124) dabei eine Innenwand der eingelassenen Nut (19) bildet und die zweite Seitenwand
(25, 125) eine Außenwand der eingelassenen Nut (19) bildet.
2. Stuhl gemäß Anspruch 1,
wobei die Grundplatte (13, 113, 213, 313) von einer im Wesentlichen rechteckigen Form
mit Eckteilen an vier Ecken und linearen Teilen zwischen den Eckteilen gebildet wird,
wobei die Eckteilen mit den ersten Verriegelungsvorrichtungen versehen sind und wobei
zumindest einige der linearen Teile mit der zweiten Verriegelungsvorrichtung vorgesehen
sind.
3. Stuhl gemäß Anspruch 1,
wobei die jeweiligen Spitzenteile der ersten vorspringenden Wand (26, 126, 226, 326)
und der zweiten vorspringenden Wand (27, 127, 227, 327), die nebeneinander vorgesehen
sind, bis zu Positionen verlaufen, die im Wesentlichen die halbe Länge der Weite aufweisen,
die die erste von der zweiten Seitenwand trennt, in einer Richtung, die die Richtung
schneidet, in die die Spannschnur (18) verläuft.
4. Stuhl gemäß Anspruch 1,
wobei Abschnitte der Spitzenteile der ersten vorspringenden Wand (26, 126, 226, 326)
und der zweiten vorspringenden Wand (27, 127, 227, 327) so angeordnet sind, dass sie
einander gegenüber liegen, und die restlichen Teile so angeordnet sind, dass sie voneinander
in der Richtung, in der die Spannschnur (18) verläuft, getrennt sind.
1. Siège, comprenant un corps de support de charge, le corps de support de charge incluant
:
une plaque de base (13, 113, 213, 313) constituant une armature ;
un matériau de coussin (14) agencé d'un côté surface avant de la plaque de base ;
un matériau de garniture (15) étiré pour recouvrir au moins une surface extérieure
du matériau de coussin et un bord périphérique externe de la plaque de base ; et
un cordon de serrage (18) inséré à travers un bord périphérique du matériau de garniture
et serré pour permettre aux parties d'extrémité d'être attachées ensemble d'un côté
surface arrière de la plaque de base dans un état dans lequel le matériau de garniture
(15) a recouvert la surface extérieure du matériau de coussin (14) et le bord périphérique
externe de la plaque de base,
dans lequel la plaque de base (13, 113, 213, 313) est dotée d'un premier moyen de
verrouillage pour restreindre le déplacement du cordon de serrage (18) serré dans
une direction vers le centre de la plaque de base, et d'un second moyen de verrouillage
pour restreindre le déplacement du cordon de serrage (18) serré dans une direction
vers l'extérieur de la plaque de base,
le premier moyen de verrouillage inclut une première paroi latérale (24, 124) faisant
saillie à partir d'une surface arrière de la plaque de base vers un côté arrière,
et une première paroi saillante (26, 126, 226, 326) faisant saillie dans une direction
vers l'extérieur de la plaque de base à partir du voisinage d'une extrémité saillante
de la première paroi latérale,
le second moyen de verrouillage inclut une seconde paroi latérale (25, 125) faisant
saillie à partir de la surface arrière de la plaque de base vers le côté arrière,
et une seconde paroi saillante (27, 127, 227, 327) faisant saillie dans une direction
vers l'intérieur de la plaque de base à partir du voisinage d'une extrémité saillante
de la seconde paroi latérale ; et
la première paroi saillante (24, 124) et la seconde paroi saillante (25, 125) sont
agencées de façon à être séparées l'une de l'autre dans une direction dans laquelle
le cordon de serrage (18) s'étend, et à être adjacentes l'une à l'autre
caractérisé en ce que :
une gorge évidée (19) qui est continue dans une direction circonférentielle de la
plaque de base est formée dans la surface arrière de la plaque de base, la première
paroi latérale (24, 124) est une paroi intérieure de la gorge évidée (19), et la seconde
paroi latérale (25, 125) est une paroi extérieure de la gorge évidée (19).
2. Siège selon la revendication 1,
dans lequel la plaque de base (13, 113, 213, 313) est formée dans une forme sensiblement
rectangulaire ayant des parties cunéiformes aux quatre coins et des parties linéaires
entre les parties cunéiformes,
dans lequel les parties cunéiformes sont dotées du premier moyen de verrouillage,
et
dans lequel au moins certaines des parties linéaires sont dotées du second moyen de
verrouillage.
3. Siège selon la revendication 1,
dans lequel les parties de pointe respectives de la première paroi saillante (26,
126, 226, 326) et de la seconde paroi saillante (27, 127, 227, 327) qui sont prévues
adjacentes l'une à l'autre s'étendent jusqu'à des positions ayant des longueurs sensiblement
égales à la moitié de la largeur de séparation de la première paroi latérale et de
la seconde paroi latérale dans une direction croisant la direction dans laquelle le
cordon de serrage (18) s'étend.
4. Siège selon la revendication 1,
dans lequel des portions des parties de pointe de la première paroi saillante (26,
126, 226, 326) et de la seconde paroi saillante (27, 127, 227, 327) sont agencées
pour se faire face, et les portions restantes de celles-ci sont agencées de façon
à être séparées les unes des autres dans une direction dans laquelle le cordon de
serrage (18) s'étend.