WO2022091214A1 - 椅子 - Google Patents
椅子 Download PDFInfo
- Publication number
- WO2022091214A1 WO2022091214A1 PCT/JP2020/040238 JP2020040238W WO2022091214A1 WO 2022091214 A1 WO2022091214 A1 WO 2022091214A1 JP 2020040238 W JP2020040238 W JP 2020040238W WO 2022091214 A1 WO2022091214 A1 WO 2022091214A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- chair
- axis
- backrest
- chair body
- Prior art date
Links
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- 238000003780 insertion Methods 0.000 description 18
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- 230000001105 regulatory effect Effects 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 4
- 210000002414 leg Anatomy 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 210000001217 buttock Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/006—Chair or stool bases with castors
Definitions
- This disclosure relates to chairs.
- Patent Document 1 discloses a configuration in which a reclining chair includes a chair body in which a seat and a backrest are integrally combined, and a support structure that rotatably supports the chair body. ..
- the front end portion of the seat is rotatably connected to the support structure.
- the lower end of the backrest is rotatably connected to the support structure.
- the seat and backrest are rotatably connected to each other.
- the backrest rotates with respect to the seat and the seat rotates with respect to the support structure as the backrest rotates backward with respect to the support structure. do.
- the chair reclines the backrest so that the front end of the seat is lifted upward.
- the purpose of this disclosure is to provide a chair that can reduce the discomfort given to the seated person.
- the chair according to one aspect of the present disclosure includes a support structure, a first member extending in the front-rear direction to form at least a part of the seat, and a rear end of the first member around the first axis along the left-right direction. It comprises a chair body that is rotatably provided and has a second member that extends upward from the first member and forms at least a portion of the backrest, wherein the support structure is in front of the first axis.
- the second member with respect to the first member rotates around the first axis and the first with respect to the support structure.
- the member slides back and forth.
- the movement of the first member in the vertical direction due to the backward rotation of the second member is suppressed as compared with the conventional configuration in which the front end portion of the seat is lifted by the backward rotation of the backrest.
- the chair body includes a connecting member that rotatably connects the first member and the second member around the first axis.
- a connecting member that is separate from the first member and the second member, it is easy to adjust the amount of rotation of the second member with respect to the first member while ensuring the strength of the chair body. ..
- the chair body has a first position where the angle formed by the first member and the second member around the first axis is the first angle, and the first member and the second member. It is configured to be rotatable between a second position where the angle formed around the first axis is a second angle smaller than the first angle, and the second support portion is formed on the second axis. It is a shaft member extending along the shaft member, and the second member has an opening that opens in the crossing direction intersecting the second axis and into which the second support portion can be inserted, and the second support portion is inserted.
- the chair body When the holding portion to be held and the chair body are in the first position, the chair body engages with the support structure in the crossing direction to restrict the movement of the second member with respect to the support structure in the crossing direction.
- the chair body is provided with a retaining portion that separates from the support structure when the chair body is in the second position and allows the second member to move in the crossing direction with respect to the support structure. Is preferable.
- the second support portion is attached to and detached from the holding portion through the opening by approaching or separating the holding portion and the second support portion in the crossing direction with the chair body in the second position. Can be done.
- one member of the second member and the support structure engages with the second member and the other member of the support structure when the chair body is in the first position. Therefore, it is preferable that a restricting portion for restricting the rotation of the chair body to the second position around the first axis is detachably provided. According to this aspect, it is possible to restrict the return of the second member to the second position after the second member is assembled to the support structure. As a result, both the ease of assembly and the reliability after assembly can be ensured.
- the first member has another opening that is open in the front-rear direction and into which the first support portion can be inserted, and a slit extending in the front-rear direction is formed, and the first support portion is formed.
- the second support portion can be inserted into the slit through another opening.
- the discomfort given to the seated person can be reduced.
- FIG. 3 is a cross-sectional view taken along the line VII-VII of FIG.
- FIG. 2 is a cross-sectional view taken along the line VIII-VIII of FIG.
- FIG. 8 shows the state which the chair main body is in an assembly position in an embodiment. It is sectional drawing corresponding to FIG.
- FIG. 1 is a side view of the chair 1.
- the chair 1 includes a support structure 2 and a chair body 3.
- the orientations such as front-back, up-down, left-right, etc. are the same as the orientations of the person (seat person) seated in the chair 1 in the normal posture.
- the arrow UP in the figure indicates upward
- the arrow FR indicates forward
- the LH indicates left.
- the side separated from the center in the front-rear direction and the left-right direction (width direction) may be referred to as the outside, and the side toward the center may be referred to as the inside.
- the support structure 2 includes a leg portion 11 and a support base 12.
- the leg portion 11 includes a multi-legged leg 14 and a pedestal 15.
- a caster 16 capable of traveling on the floor surface F is attached to each leg of the multi-legged 14.
- the pedestal 15 is erected above the central part of the multi-leg 14.
- the pedestal 15 has a built-in gas spring 17, which is an elevating mechanism for the chair 1.
- the gas spring 17 has a configuration in which the inner cylinder 17a is supported so as to be able to move up and down and relative to the outer cylinder (not shown) provided in the pedestal 15, for example.
- FIG. 2 is a perspective view of the chair body 3 and the support base 12.
- the upholstery material 111 of the chair body 3 is omitted.
- the support base 12 is fixed to the upper end portion of the pedestal 15 (inner cylinder 17a).
- the support base 12 includes a casing 21, an elevating operation mechanism 22, a tilting mechanism 23, and a tilting adjusting mechanism 24.
- the casing 21 is formed in a box shape that opens upward.
- the casing 21 is integrally molded of aluminum or the like.
- the casing 21 includes a case main body 31, a pair of front extending portions 32, and a rear case 33.
- FIG. 3 is a cross-sectional view taken along the line III-III of FIG.
- the bottom wall of the case body 31 is formed with an insertion port 31a penetrating the bottom wall.
- the inner cylinder 17a is assembled to the casing 21 through the insertion port 31a.
- the pair of forward extending portions 32 extend forward from both ends in the left-right direction of the case main body 31.
- the pair of anterior extending portions 32 extend so as to be inclined upward toward the front in the side view.
- the pair of anterior extending portions 32 extend outward in the left-right direction toward the front in a plan view.
- the rear case 33 extends rearward from the central portion in the left-right direction of the case body 31. In the rear case 33, the width in the left-right direction is narrower than that of the case body 31.
- ribs, lightening, and the like are appropriately provided.
- the elevating operation mechanism 22 includes a bearing portion 41 and an operation rod 42.
- the bearing portion 41 is provided on the right side of the insertion port 31a in the case main body 31.
- the operation rod 42 is supported by the bearing portion 41 so as to be rotatable around an axis along the left-right direction.
- the left-right inner end of the operation rod 42 is linked to the inner cylinder 17a in the case body 31.
- the left-right outer end of the operation rod 42 penetrates the side wall of the case body 31 and projects to the right with respect to the case body 31.
- a handle (not shown) is attached to the outer end of the operation rod 42 in the left-right direction outside the casing 21.
- the elevating operation mechanism 22 operates the gas spring 17 by rotating the operation rod 42 via the handle.
- the tilting mechanism 23 includes a slider (first support portion: see FIG. 4) 51 and a backrest support shaft (second support portion) 52.
- FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
- FIG. 5 is a cross-sectional view taken along the line VV of FIG.
- the slider 51 is provided at the front end portion of each front extending portion 32, respectively.
- the slider 51 includes a linking portion 55 and an entry restriction piece 56.
- the linking portion 55 is formed in an I-shaped block shape when viewed from the front.
- the linking portion 55 includes a lower wall portion 57, a pillar portion 58, and an upper wall portion 59.
- the lower wall portion 57 is fixed on the front end portion of the front extending portion 32 by a screw 60 or the like.
- the pillar portion 58 extends upward from the central portion in the left-right direction of the lower wall portion 57.
- the upper wall portion 59 projects on both sides in the left-right direction with respect to the pillar portion 58.
- the entry control piece 56 extends forward from the coupling portion 55 in a cantilevered manner.
- the backrest support shaft 52 is a shaft member that penetrates the rear case 33 in the left-right direction. Both ends of the backrest support shaft 52 in the left-right direction project from the side wall of the rear case 33 to the outside of the rear case 33.
- the tilt adjusting mechanism 24 includes a bearing portion 61, an operation rod 62, and a link mechanism 63.
- the bearing portion 61 is provided on the left side with respect to the insertion port 31a in the case main body 31.
- the operation rod 62 is supported by the bearing portion 61 so as to be rotatable around an axis along the left-right direction.
- the left-right outer end of the operation rod 62 penetrates the side wall of the case body 31 and projects to the left with respect to the case body 31.
- a handle (not shown) is attached to the outer end of the operation rod 62 in the left-right direction outside the casing 21.
- FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.
- the link mechanism 63 includes a first arm 71, a second arm 72, a guide portion 73, and an advancing / retreating piece 74.
- the first arm 71 is fixed to the inner end portion of the operation rod 62 in the left-right direction.
- the first arm 71 extends from the operation rod 62 in the radial direction (downward) of the operation rod 62.
- a linking pin 71a projects from the tip of the first arm 71 toward the inside in the left-right direction.
- the linking pin 71a moves around the operating rod 62 in the front-rear direction as the operating rod 62 rotates.
- the second arm 72 is configured to be movable in the front-rear direction as the linking pin 71a moves in the front-rear direction with the rotation of the operation rod 62.
- the second arm 72 includes a first connecting piece 75, a connecting piece 76, and a second connecting piece 77 (see FIG. 3).
- the first connecting piece 75 is formed in a plate shape with the left-right direction as the thickness direction.
- An insertion hole 75a is formed at the lower end of the first connecting piece 75.
- the insertion hole 75a is formed in a long hole.
- a linking pin 71a is inserted into the insertion hole 75a.
- the connecting piece 76 extends rearward from the upper end of the connecting piece 75. As shown in FIG.
- the connecting piece 76 extends rearward in a state of being bent in a crank shape in the left-right direction in a plan view.
- the rear end portion of the connecting piece 76 is located behind the backrest support shaft 52 in the rear case 33.
- the second connecting piece 77 projects downward from the rear end portion of the connecting piece 76.
- the guide portion 73 is fixed in the rear case 33 in a state of being inserted into the through hole 33b formed in the rear wall portion 33a of the rear case 33.
- the guide portion 73 includes an upper plate 78 and a lower plate 79 facing each other in the vertical direction.
- the space surrounded by the upper plate 78 and the lower plate 79 constitutes the slide space S1.
- the upper plate 78 is formed with an upper slit 78a extending in the front-rear direction.
- a lower slit 79a extending in the front-rear direction is formed at a position facing the upper slit 78a.
- a second connecting piece 77 is bridged between the upper slit 78a and the lower slit 79a. The second connecting piece 77 is inserted into the upper slit 78a from above the upper plate 78 and crosses the slide space S1 in the vertical direction.
- the advancing / retreating piece 74 is housed so as to be movable in the front-rear direction in the slide space S1.
- the advancing / retreating piece 74 is formed in a plate shape extending in the front-rear direction with the vertical direction as the thickness direction.
- the advancing / retreating piece 74 is connected to the second connecting piece 77 in the slide space S1.
- the advancing / retreating piece 74 moves in the front-rear direction as the second arm 72 moves in the front-rear direction.
- the advancing / retreating piece 74 moves in the front-rear direction between a protruding position (see FIG. 3) protruding rearward from the casing 21 through the through hole 33b and a retracting position (see FIG.
- the advancing / retreating piece 74 may be connected to the second connecting piece 77 in a state of being urged toward the protruding position by a urging member such as a spring, or may be directly connected to the second connecting piece 77. good.
- the chair body 3 includes a seat 100 and a backrest 101.
- the seat 100 extends in the anteroposterior direction in lateral view. In the illustrated example, the seat 100 is tilted downward from the rear to the front.
- the upper surface of the seat 100 constitutes a seat surface 100a that supports the range from the buttocks to the thighs of the seated person from below.
- the seat 100 is supported so as to be slidable in the front-rear direction with respect to the support base 12.
- the backrest 101 extends upward from the rear end of the seat 100.
- the backrest 101 of the present embodiment has a gentle S-shape when viewed from the side.
- the front surface of the backrest 101 constitutes a back receiving surface 101a that supports the waist and back of the seated person from behind.
- the chair body 3 may be provided with armrests.
- the backrest 101 is provided so as to be rotatable around the axis O1 along the left-right direction with respect to the seat 100.
- the backrest 101 is rotatably connected to the support base 12 around the axis O2 of the backrest support shaft 52.
- the seat 100 is provided so as to be slidable in the front-rear direction with respect to the support base 12 as it rotates around the axis O2 of the backrest 101 with respect to the support base 12 and around the axis O1 of the backrest 101 with respect to the seat 100. Has been done.
- the chair body 3 includes a shell 110 and an upholstery material 111.
- the shell 110 is a frame-shaped member that forms the outer shell of the chair body 3.
- the shell 110 includes a seat frame 120 that constitutes the outer shell of the seat 100, a back frame 123 that constitutes the outer shell of the backrest 101, and a connecting member 121 that connects the seat frame 120 and the back frame 123. ..
- the seat frame 120, the connecting member 121, and the back frame 123 are each made of a resin material or the like.
- the seat frame 120 is formed in a U shape that opens rearward in a plan view.
- the seat frame 120 includes a front rod portion 130, a side rod portion 131, a seat engaging portion 132 (see FIG. 4), and a spring accommodating portion 133 (see FIG. 4).
- the front rod portion 130 extends in the left-right direction at the front end portion of the seat 100.
- the side rod 131 extends rearward from both ends of the front rod 130 in the left-right direction.
- FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. As shown in FIG. 7, a recess 131a that opens on the rear end surface is formed on the rear end surface of each side rod portion 131.
- the rear end surface of the side rod portion 131 is formed as an inclined surface that extends forward as it goes downward.
- the seat engaging portion 132 is supported by the slider 51 so as to be movable in the front-rear direction with respect to the support base 12.
- the seat engaging portion 132 is formed integrally with the front rod portion 130 or the side rod portion 131 at both ends of the front rod portion 130 in the left-right direction.
- the configuration of the seat engaging portion 132 will be described by taking one of the seat engaging portions 132 as an example.
- the seat engaging portion 132 is formed in a cylindrical shape extending in the front-rear direction. In the present embodiment, the seat engaging portion 132 extends while being slightly inclined or curved downward toward the rear.
- the seat engaging portion 132 has a rear end opening 132a (see FIG. 5) that opens rearward.
- a slit 132c is formed in the bottom wall portion 132b of the seat engaging portion 132.
- the slit 132c extends in the front-rear direction.
- the slit 132c has a slit opening (another opening) 132e that opens on the rear end surface of the bottom wall portion 132b.
- a relief portion 135 is formed at a position facing the seat engaging portion 132 in the front-rear direction.
- the relief portion 135 extends in the front-rear direction on the extension line of the slit 132c.
- the relief portion 135 opens rearward and downward.
- the slider 51 is housed in the seat engaging portion 132 through the rear end opening 132a and the slit opening 132e.
- the upper wall portion 59 is arranged in the seat engaging portion 132 with the pillar portion 58 penetrating the slit 132c in the vertical direction. Therefore, the pillar portion 58 is configured to be movable in the front-rear direction in the slit 132c while the movement in the left-right direction is restricted by the inner surface of the slit 132c.
- the upper wall portion 59 is configured to be movable in the front-rear direction in the seat engagement portion 132 in a state where the movement in the vertical direction is restricted by the bottom wall portion 132b and the top wall portion 132d of the seat engagement portion 132. There is.
- the entry control piece 56 overlaps with the slit 132c in a plan view in the seat engaging portion 132.
- the approach restricting piece 56 enters or retracts from the escape portion 135 as the slider 51 moves in the front-rear direction.
- the entry restriction piece 56 restricts the entry of a finger, an article, or the like into the seat engaging portion 132 through the slit 132c.
- the spring accommodating portion 133 is integrally formed with the seat engaging portion 132 above the seat engaging portion 132.
- the spring accommodating portion 133 is formed in a cylindrical shape that opens toward the rear.
- the spring accommodating portion 133 is formed with a slide allowable portion 133a that opens inward in the left-right direction.
- the slide allowable portion 133a is a slit that extends in the front-rear direction and opens on the rear end edge of the spring accommodating portion 133.
- the connecting member 121 includes a seat connecting portion 140, a back connecting portion 141, and a pivot portion 142.
- the seat connecting portion 140 is a rod-shaped member extending in the front-rear direction.
- the seat connecting portion 140 is inserted from the rear into the recess 131a of the side rod portion 131.
- the seat connecting portion 140 is fixed to the side rod portion 131 by fastening screws or the like to the side rod portion 131 from the inside in the left-right direction.
- the back connecting portion 141 is formed in a rod shape extending rearward from the rear end portion of the seat connecting portion 140.
- the front end portion of the back connecting portion 141 overlaps the rear end portion of the seat connecting portion 140 in the left-right direction.
- the pivot portion 142 is formed in a rod shape extending in the left-right direction.
- the pivot portion 142 penetrates the rear end portion of the seat connecting portion 140 and the overlapping portion of the back connecting portion 141 with the front end portion in the left-right direction. Therefore, the seat connecting portion 140 and the back connecting portion 141 are configured to be rotatable around the axis O1 of the pivot portion 142.
- the back frame 123 includes a lower frame 150, a main body frame 151, and a support frame 152 (see FIG. 2).
- the lower frame 150 is connected to the rear end of the side rod portion 131 via a connecting member 121.
- the lower frame 150 is inclined upward toward the rear.
- a recess 150a that opens toward the front is formed on the front end surface of the lower frame 150.
- a back connecting portion 141 is inserted into the recess 150a.
- the back connecting portion 141 is fixed to the lower frame 150 by fastening screws or the like from the inside in the left-right direction to the lower frame 150.
- the seat frame 120 and the back frame 123 are integrally combined via the connecting member 121.
- the back frame 123 is configured to be rotatable around the axis O1 with respect to the seat frame 120.
- the main body frame 151 is formed in a rectangular frame shape when viewed from the front. Specifically, the main body frame 151 includes a pair of vertical rod portions 155, a lower rod portion 156, and an upper rod portion 157.
- the pair of vertical rods 155 extend upward from the rear end of each lower frame 150. In the side view, the vertical rod portion 155 extends forward as it goes upward, and then extends backward as it goes further upward.
- the lower rod portion 156 bridges the lower end portions of the pair of vertical rod portions 155 in the left-right direction.
- the upper rod portion 157 bridges the upper end portions of the pair of vertical rod portions 155 in the left-right direction.
- the support frame 152 bridges between the lower frames 150.
- the support frame 152 includes a pair of connection frames 160 and a support base connecting portion 161.
- the connection frame 160 extends inward in the left-right direction from each lower frame 150.
- the connection frame 160 extends while curving downward toward the inside in the left-right direction.
- the support base connecting portion 161 connects between a pair of connection frames 160.
- the support base connecting portion 161 is located below the lower frame 150 in a side view.
- the support base connecting portion 161 is located inside the pair of lower frames 150 in the left-right direction.
- the support base connecting portion 161 is formed in a U shape that opens toward the front.
- the support base connecting portion 161 includes a regulating wall portion 165 and a pair of front projecting portions 167.
- the regulation wall portion 165 extends in the left-right direction.
- the front protrusion 167 extends diagonally forward and downward from both ends in the left-right direction of the regulation wall portion 165.
- FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG.
- a holding portion 168 is formed on the inner surface of the front end portion of the front protruding portion 167.
- the holding portion 168 is a recess that opens inward in the left-right direction in the front protruding portion 167.
- the holding portion 168 holds a portion of the backrest support shaft 52 that protrudes from the rear case 33.
- the back frame 123 is rotatably supported around the axis O2 along the left-right direction with the backrest support shaft 52 as a fulcrum.
- the holding portion 168 has an insertion opening (opening) 168a that opens on the front end surface of the front protruding portion 167.
- the backrest support shaft 52 can be inserted into the holding portion 168 through the insertion opening 168a.
- the insertion opening 168a opens in the radial direction (intersection direction) of the axis O2 in a state where the backrest support shaft 52 is housed in the holding portion 168.
- a retaining portion 170 is formed on the inner surface of the holding portion 168 facing the circumferential direction around the axis O2.
- the retaining portion 170 is an arcuate groove extending in the circumferential direction around the axis O2.
- the retaining portion 170 is opened on the inner surface of the holding portion 168 and is opened inward in the left-right direction at the front protruding portion 167.
- a protrusion 173 is formed on both side walls of the rear case 33, which faces the front protrusion 167 in the left-right direction.
- the protrusion 173 is housed in the retaining portion 170.
- the protrusion 173 moves forward and backward from the retaining portion 170 according to the angle ⁇ (see FIG. 1) of the back frame 123 with respect to the seat frame 120.
- the angle ⁇ of the back frame 123 with respect to the seat frame 120 is the first virtual line L1 connecting the axis O1 and the front end of the seat frame 120 in the side view, and the axis O1 and the back frame 123. It is an angle formed by the second virtual line L2 connecting to the upper end of the above.
- the protrusion 173 is housed in the retaining portion 170 (used position (first position)) as shown in FIG.
- the protrusion 173 engages (contacts) with the inner surface of the retaining portion 170 in the radial direction (front-back direction) of the axis O2, thereby restricting the backward movement of the back frame 123 with respect to the backrest support shaft 52.
- FIG. 9 is a cross-sectional view corresponding to FIG. 8 showing a state in which the chair body 3 is in the assembly position (second position).
- the angle ⁇ of the chair body 3 is at the second angle smaller than the first angle
- the protrusion 173 is separated from the retaining portion 170 (assembly position).
- the entire protrusion 173 is located in the holding portion 168, so that the engagement (contact) with the retaining portion 170 is released. That is, at the assembly position, the axial line O2 of the back frame 123 with respect to the backrest support shaft 52 is allowed to move in the radial direction (rearward).
- the backrest support shaft 52 and the protrusion 173 are configured to be detachable from the holding portion 168.
- the protrusion 173 may have a larger amount of entry into the holding portion 168 at the assembled position than the amount of entry into the holding portion 168 at the used position.
- a vertical groove 180 is formed on the front surface of the regulation wall portion 165.
- the vertical groove 180 extends in the vertical direction at both ends of the regulation wall portion 165 in the left-right direction.
- a return stopper (regulatory portion) 181 is locked in each vertical groove 180. In the following description, of each return stopper 181, the return stopper 181 locked in one of the vertical grooves 180 will be described.
- the return stopper 181 is detachably attached to the rear wall portion 33a.
- the return stopper 181 includes a shaft portion 181a, a flange portion 181b, and a knob portion 181c.
- the shaft portion 181a is formed in a rod shape extending in the front-rear direction.
- an insertion hole 33c penetrating the rear wall portion 33a is formed at a position facing the vertical groove 180 in the front-rear direction.
- the shaft portion 181a penetrates the rear wall portion 33a through the insertion hole 33c.
- the tip end portion (rear end portion) of the shaft portion 181a protrudes rearward from the rear case 33.
- the tip portion of the shaft portion 181a has entered the vertical groove 180.
- the return stopper 181 regulates the rotation of the back frame 123 to the assembly position by engaging (contacting) the shaft portion 181a with the lower surface of the vertical groove 180 (the surface of the inner surface facing upward) from above. There is.
- the flange portion 181b is formed at the base end portion (front end portion) of the shaft portion 181a with an enlarged diameter with respect to the shaft portion 181a.
- the flange portion 181b is in close proximity to or in contact with the rear wall portion 33a from the front.
- the flange portion 181b is formed with a tapered surface extending diagonally upward in the front direction.
- the knob portion 181c projects upward from the flange portion 181b.
- a positioning bolt 185 is provided at a portion located in front of the return stopper 181.
- the positioning bolt 185 is provided so as to protrude into the rear case 33 from the bottom wall portion 33d of the rear case 33.
- the positioning bolt 185 is arranged in front of the flange portion 181b and restricts the forward movement of the return stopper 181 with respect to the rear case 33. That is, the positioning bolt 185 suppresses the return stopper 181 from coming off the vertical groove 180.
- a tilt regulating portion 190 is formed in a portion of the regulating wall portion 165 located between the vertical grooves 180.
- the tilt control portion 190 is a recess that opens on the front surface and the lower surface of the regulation wall portion 165.
- the advancing / retreating piece 74 retracts from the tilt control unit 190. That is, when the advancing / retreating piece 74 is in the retracted position, the advancing / retreating piece 74 retracts from the rotation locus of the back frame 123 to allow the back frame 123 to rotate.
- the back frame 123 abuts on a restricting portion (not shown) provided on the casing 21, thereby limiting the rotation range.
- the back frame 123 may have a smaller rotation range when the tilt limiting unit 190 is in the protruding position than when the tilting restricting unit 190 is in the retracted position. That is, the back frame 123 may be prevented from rotating or may rotate slightly when the tilt limiting portion 190 is in the protruding position.
- the upholstery material 111 is fastened to the outer peripheral edge of the shell 110 to close the opening of the shell 110 from the front and above. Specifically, the upholstery 111 is integrally fastened along the outer peripheral edges of the seat frame 120 and the back frame 123. The portion of the upholstery material 111 that covers the seat frame 120 constitutes the seat surface 100a. The portion of the upholstery material 111 that covers the back frame 123 constitutes the back receiving surface 100b.
- the upholstery material 111 is formed by combining elastic synthetic resin fibers in a mesh shape. However, the upholstery material 111 is not limited to the mesh shape, but may be, for example, a cloth shape or a film shape, as long as it is configured to be deformed according to the rotation of the backrest 101 with respect to the seat 100.
- an urging mechanism 200 is interposed between the seat frame 120 and the support base 12.
- the urging mechanism 200 urges the seat frame 120 toward the front.
- the urging mechanism 200 includes a first urging member 201, a holding member 202, and a second urging member 203.
- the first urging member 201 is formed of an elastically deformable wire rod spanned between the casing 21 and the spring accommodating portion 133. Specifically, in the state where the central portion of the first urging member 201 is supported by the front end portion of the case body 31, both ends in the left-right direction are upward and upward along the inside of the front extending portion 32 toward the front. It extends outward in the left-right direction. Both ends of the first urging member 201 in the left-right direction enter the spring accommodating portion 133 through the slide allowable portion 133a.
- the holding member 202 is housed in the spring accommodating portion 133.
- the holding member is connected to the outer end portion of the first urging member 201 in the left-right direction.
- the holding member 202 rotatably holds the first urging member 201 around an axis along the left-right direction.
- a screw 205 protruding into the spring accommodating portion 133 is provided at the rear of the spring accommodating portion 133.
- the holding member 202 is positioned in the front-rear direction within the spring accommodating portion 133 by being sandwiched between the screw 205 and the second urging member 203 in the front-rear direction.
- the second urging member 203 is, for example, a coil spring.
- the second urging member 203 is housed in a portion of the spring accommodating portion 133 located in front of the holding member 202.
- the first urging member 201 is located rearward by the length of the second urging member 203 in the front-rear direction.
- the second urging member 203 is interposed between the front wall of the spring accommodating portion 133 and the holding member 202 to urge the seat frame 120 forward.
- FIG. 11 is a side view of the chair 1 showing the reclining state of the backrest 101.
- the chair 1 of the present embodiment constitutes a link mechanism in which the support base 12 (casing 21) is a fixed link, the back frame 123 is a rotary link, and the seat frame 120 is a slide link. Specifically, when a seated person leans against the backrest 101 while the seated person is seated on the chair body 3, a backward load acts on the chair body 3 via the backrest 101.
- the backrest 101 rotates backward around the axis O2 with respect to the support base 12. Then, the backrest 101 rotates backward around the axis O1 with respect to the seat 100. As a result, the seat 100 is pulled backward as the backrest 101 rotates.
- the seat 100 is configured to be movable in the front-rear direction while the movement in the vertical direction is restricted by the slider 51, the seat 100 slides backward with respect to the support base 12 as the backrest 101 rotates. Moving.
- the seat engaging portion 132 extends downward toward the rear, the seat 100 moves downward toward the rear.
- the backrest 101 is reclining backward while the entire chair body 3 moves backward.
- the urging members 201 and 203 are elastically deformed as the seat 100 moves rearward. As a result, the urging force of the urging mechanism 200 increases.
- the seat 100 When the seated person gets up and the load acting on the backrest 101 is released, the seat 100 tries to move forward by the urging force of the urging mechanism 200. Along with this, the backrest 101 rotates forward around the axis O1 with respect to the seat 100, and rotates forward around the axis O2 with respect to the support base 12. As a result, the chair body 3 returns to the initial state. At this time, the urging force of the coil spring as the second urging member 203 is added to the urging force of the first urging member 201 made of the wire, so that the first urging member 201 made of the wire is excessively large. There is no need for elastic deformation.
- the first urging member 201 is located rearward by the length of the second urging member 203 in the front-rear direction. Therefore, the amount of displacement of the first urging member 201 in the front-rear direction can be suppressed by the amount of elastic deformation of the second urging member 203 in the front-rear direction. From this, it is possible to prevent the first urging member 201 from deteriorating over time.
- the operation of the chair 1 in the state where the advancing / retreating piece 74 is in the protruding position will be described.
- the operation rod 62 of the tilt adjusting mechanism 24 is rotated.
- the rotational motion of the operating rod 62 is transmitted to the second arm 72 via the first arm 71, so that the rotational motion is converted into the linear motion of the second arm 72 and the advancing / retreating piece 74.
- the advancing / retreating piece 74 slides backward in the slide space S1.
- the advancing / retreating piece 74 protrudes rearward from the casing 21 and enters the tilting control unit 190. If the backrest 101 is to be reclined in this state, the top surface of the tilting control unit 190 abuts on the advancing / retreating piece 74 from above, and the rotation of the backrest 101 is restricted.
- FIG. 12 is a side view of the chair 1 showing a state in which the chair body 3 is in the assembled position.
- the seat frame 120 and the support base 12 are connected with the shell 110 in the assembled position.
- the slider 51 is inserted into the seat engaging portion 132 through the rear end opening 132a and the slit opening 132e of the seat engaging portion 132.
- the pillar portion 58 of the slider 51 is made to enter the slit 132c, and the upper wall portion 59 is made to enter the seat engaging portion 132.
- the second urging member 203 is inserted through the rear end opening of the spring accommodating portion 133.
- the holding member 202 is inserted through the rear end opening of the spring accommodating portion 133.
- the outer end portion of the first urging member 201 in the left-right direction enters the slide allowable portion 133a.
- the screw 205 is attached to the spring accommodating portion 133, and the tip end portion of the screw 205 is projected into the spring accommodating portion 133.
- the urging mechanism 200 is assembled in the spring accommodating portion 133 with the initial urging force stored in both the first urging member 201 and the second urging member 203.
- the seat frame 120 is assembled to the support base 12.
- the back frame 123 and the support base 12 are connected. Specifically, the backrest support shaft 52 is made to enter the holding portion 168 through the insertion opening 168a of the holding portion 168. After that, the back frame 123 is rotated to the used position. Then, the protrusion 173 enters the retaining portion 170, and the rearward movement of the back frame 123 with respect to the backrest support shaft 52 is restricted.
- the chair body 3 is assembled to the support base 12.
- the above-mentioned assembly method may be performed after the upholstery material 111 is assembled to the shell 110.
- the support base 12 moves the seat frame 120 in the front-rear direction. It is configured to include a slider 51 that can support the back frame 123 and a backrest support shaft 52 that rotatably supports the back frame 123 around the second axis O2.
- the backrest 101 (back frame 123) rotates around the axis O1 with respect to the seat 100 (seat frame 120) as the backrest 101 rotates around the axis O2 with respect to the support base 12.
- the seat 100 slides back and forth with respect to the support base 12.
- the chair 1 of the present embodiment is configured to include a connecting member 121 that rotatably connects the seat frame 120 and the back frame 123 around the axis O1. According to this configuration, by using the connecting member 121 that is separate from the seat frame 120 and the back frame 123, the strength of the chair body 3 is secured, and the amount of rotation of the back frame 123 with respect to the seat frame 120 is adjusted. Easy to do.
- the chair body 3 when the chair body 3 (shell 110) is in the use position, it engages with the protrusion 173 in the opening direction of the insertion opening 168a, and the back frame with respect to the support base 12 in the radial direction of the axis O2.
- a retaining portion 170 that restricts the movement of the 123 and allows the back frame 123 to move with respect to the support base 12 in the radial direction of the axis O2 by separating from the protrusion 173 when the chair body 3 is in the assembly position.
- the configuration was set to.
- the holding portion 168 and the backrest support shaft 52 are brought closer to or separated from each other in the radial direction of the axis O2 to support the backrest through the insertion opening 168a.
- the shaft 52 can be attached to and detached from the holding portion 168.
- the chair body 3 in the used position while the backrest support shaft 52 is housed in the holding portion 168, it is possible to prevent the backrest support shaft 52 from detaching from the holding portion 168 through the insertion opening 168a. can. Thereby, even if the seat 100 and the backrest 101 are integrally combined, the assembling property can be improved.
- a return stopper 181 that engages with the back frame 123 and restricts rotation to the assembly position around the axis O1 is detachable from the support base 12.
- the configuration is provided in. According to this configuration, it is possible to restrict the back frame 123 from returning to the assembled position after the back frame 123 is assembled to the support base 12. As a result, both the ease of assembly and the reliability after assembly can be ensured.
- the seat engaging portion 132 opens rearward and has a slit 132c extending in the front-rear direction, and the slider 51 is supported so as to be movable in the front-rear direction in the slit 132c. And said. According to this configuration, the slider 51 can be inserted into the slit 132c through the rear end opening 132a of the seat engaging portion 132. Thereby, the assembling property of the seat frame 120 to the support base 12 can be improved.
- the present disclosure is not limited to these embodiments. Configuration may be added, omitted, replaced, or otherwise modified without departing from the spirit of the present disclosure.
- the present disclosure is not limited by the above description, but only by the appended claims.
- the connecting member may have a configuration having only a pivot portion that rotatably connects the seat frame 120 and the back frame 123. Further, the connecting member may be configured to be bendable. Further, the chair body 3 may have a configuration that does not have a connecting member.
- the seat frame 120 and the back frame 123 may be integrally formed so as to be bendable.
- a configuration including a first urging member 201 made of a wire rod and a second urging member 203 made of a coil spring as an urging mechanism 200 interposed between the seat frame 120 and the casing 21 has been described.
- the urging mechanism 200 may be configured to include either the first urging member 201 or the second urging member 203.
- the configuration in which the retaining portion 170 opens on the inner surface of the holding portion 168 has been described, but the configuration is not limited to this.
- the retaining portion 170 may be provided at a position different from that of the holding portion 168.
- the configuration in which the block-shaped slider 51 is adopted as the first support portion and the slit 132c is formed in the seat frame 120 has been described, but the present invention is not limited to this configuration.
- the first support portion may support the seat frame 120 so as to be movable in the front-rear direction.
- the first support portion may be a slit
- the seat frame 120 may be provided with a slider or the like that can move in the slit.
- the first support portion and the seat frame 120 may be a combination of a rail and a roller or the like.
- the configuration in which the backrest support shaft 52 is adopted as the second support portion and the holding portion 168 is formed on the back frame 123 has been described, but the configuration is not limited to this.
- a shaft may be provided on the back frame 123, and a holding portion rotatably supported by the shaft may be provided on the second support portion.
- the configuration in which the return stopper 181 is provided on the support base 12 has been described, but the configuration is not limited to this.
- the return stopper 181 may be detachably provided on the back frame 123 and may be configured to engage with the support base 12.
- the case where the seat frame 120 constitutes the outer shell of the seat 100 and the back frame 123 constitutes the outer shell of the backrest 101 in the chair body 3 (shell 110) has been described.
- the outer shell of the chair body 3 may be formed by the first member constituting a part of the outer shell of the seat 100 and the second member forming a part of the outer shell of the backrest 101.
- the seat frame 120 may form the first half portion of the seat 100
- the back frame 123 may form the second half portion of the seat 100 and the backrest 101.
- the seat frame 120 includes the front end of the chair body 3 and constitutes a region of 1/2 or more with respect to the total length of the seat 100
- the back frame 123 includes the upper end of the chair body 3.
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs Characterized By Structure (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
本開示の一態様に係る椅子は、支持構造体と、前後方向に延びて座の少なくとも一部を構成する第1部材、及び前記第1部材の後端に左右方向に沿う第1軸線回りに回動可能に設けられ、前記第1部材から上方に延びて背凭れの少なくとも一部を構成する第2部材を有する椅子本体と、を備え、前記支持構造体は、前記第1軸線の前方において前記第1部材を前後方向に移動可能に支持する第1支持部と、前記第1軸線の下方において前記第2部材を左右方向に沿う第2軸線回りに回動可能に支持する第2支持部と、を備えている。
本態様によれば、第1部材及び第2部材とは別体の連結部材を用いることで、椅子本体の強度を確保した上で、第1部材に対する第2部材の回動量等を調整し易い。
本態様によれば、椅子本体を第2位置とした状態で、保持部と第2支持部とを交差方向に接近又は離反させることで、開口部を通じて第2支持部を保持部に着脱することができる。一方、第2支持部が保持部内に収容された状態で、椅子本体を第1位置とすることで、第2支持部が開口部を通じて保持部から離脱するのを抑制できる。これにより、第1部材と第2部材とが一体に組み合わされた構成であっても、組付性を向上させることができる。
本態様によれば、第2部材を支持構造体に組み付けた後、第2部材が第2位置に戻るのを規制できる。これにより、組付性と、組付後の信頼性の双方を確保できる。
本態様によれば、他の開口部を通じてスリット内に第2支持部を挿入することができる。これにより、第1部材の支持構造体への組付性を向上させることができる。
図1に示すように、椅子1は、支持構造体2と、椅子本体3と、を備えている。以下の説明において、前後上下左右等の向きは、椅子1に正規姿勢で着座した人(着座者)の向きと同一とする。この場合、図中における矢印UPは上方を示し、矢印FRは前方を示し、LHは左方を示している。また、以下の説明では、椅子1において、前後方向及び左右方向(幅方向)で中心から離間する側を外側といい、中心に向かう側を内側という場合がある。
支持構造体2は、脚部11と、支基12と、を備えている。
脚部11は、多岐脚14と、脚柱15と、を備えている。
多岐脚14の各脚部には、床面F上を走行可能なキャスタ16が取り付けられている。
図1、図2に示すように、支基12は、脚柱15(内筒17a)の上端部に固定されている。図2に示すように、支基12は、ケーシング21と、昇降操作機構22と、傾動機構23と、傾動調整機構24と、を備えている。
図3に示すように、ケース本体31の底壁には、底壁を貫通する挿入口31aが形成されている。内筒17aは、挿入口31aを通じてケーシング21に組み付けられている。
後部ケース33は、ケース本体31における左右方向の中央部から後方に向けて延びている。後部ケース33において、左右方向の幅は、ケース本体31よりも狭い。なお、ケーシング21内には、適宜リブや肉抜き等が設けられている。
軸受部41は、ケース本体31内において挿入口31aに対して右側に設けられている。
操作ロッド42は、左右方向に沿う軸線回りに回動可能に軸受部41に支持されている。操作ロッド42における左右方向の内側端部は、ケース本体31内において内筒17aに連係する。操作ロッド42における左右方向の外側端部は、ケース本体31の側壁を貫通して、ケース本体31に対して右側に突出している。操作ロッド42における左右方向の外側端部には、ケーシング21の外部においてハンドル(不図示)が取り付けられる。昇降操作機構22は、ハンドルを介して操作ロッド42を回動操作することで、ガススプリング17を操作する。
図4、図5に示すように、スライダ51は、各前方延在部32の前端部にそれぞれ設けられている。スライダ51は、連係部55と、進入規制片56と、を備えている。連係部55は、正面視においてI型のブロック状に形成されている。連係部55は、下壁部57と、柱部58と、上壁部59と、を備えている。
下壁部57は、前方延在部32の前端部上にビス60等により固定されている。
柱部58は、下壁部57における左右方向の中央部から上方に延びている。
上壁部59は、柱部58に対して左右方向の両側に張り出している。
図5に示すように、進入規制片56は、連係部55から前方に向けて片持ちで延びている。
軸受部61は、ケース本体31内における挿入口31aに対して左側に設けられている。
操作ロッド62は、左右方向に沿う軸線回りに回動可能に軸受部61に支持されている。操作ロッド62における左右方向の外側端部は、ケース本体31の側壁を貫通して、ケース本体31に対して左側に突出している。操作ロッド62における左右方向の外側端部には、ケーシング21の外部においてハンドル(不図示)が取り付けられる。
図3、図6に示すように、リンク機構63は、第1アーム71と、第2アーム72と、ガイド部73と、進退片74と、を備えている。
図6に示すように、第1アーム71は、操作ロッド62における左右方向の内側端部に固定されている。第1アーム71は、操作ロッド62から操作ロッド62の径方向(下方)に延びている。第1アーム71の先端部には、左右方向の内側に向けて連係ピン71aが突出している。連係ピン71aは、操作ロッド62の回転に伴い、操作ロッド62の回りを前後方向に移動する。
第1連結片75は、左右方向を厚さ方向とする板状に形成されている。第1連結片75の下端部には、挿通孔75aが形成されている。挿通孔75aは、長孔に形成されている。挿通孔75a内には、連係ピン71aが挿入されている。
接続片76は、連結片75の上端部から後方に延びている。図2に示すように、接続片76は、平面視において、左右方向にクランク状に屈曲した状態で、後方に延びている。接続片76の後端部は、後部ケース33内において、背凭れ支持軸52よりも後方に位置している。
図3に示すように、第2連結片77は、接続片76の後端部から下方に突出している。
図1に示すように、椅子本体3は、座100と、背凭れ101と、を備えている。
座100は、側面視において前後方向に延びている。図示の例において、座100は、後方から前方に向かうに従い下方に傾斜している。座100の上面は、着座者の臀部から大腿部に至る範囲を下方から支持する座面100aを構成する。座100は、支基12に対して前後方向にスライド移動可能に支持されている。
背凭れ101は、座100の後端から上方に延びている。本実施形態の背凭れ101は、側面視において、緩やかなS字状をなしている。背凭れ101の前面は、着座者の腰部及び背部を後方から支持する背受け面101aを構成する。なお、椅子本体3は、肘掛けを備えていてもよい。
椅子本体3は、シェル110と、張材111と、を備えている。
シェル110は、椅子本体3の外殻を形成する枠状の部材である。シェル110は、座100の外殻を構成する座フレーム120と、背凭れ101の外殻を構成する背フレーム123と、座フレーム120及び背フレーム123を連結する連結部材121と、を備えている。なお、座フレーム120、連結部材121及び背フレーム123は、それぞれ樹脂材料等によって成形されている。
側杆部131は、前杆部130における左右方向の両端部から後方に延びている。
図7に示すように、各側杆部131の後端面には、後端面上で開口する凹部131aが形成されている。なお、側杆部131の後端面は、下方に向かうに従い前方に延びる傾斜面に形成されている。
座連結部140は、前後方向に延びる棒状の部材である。座連結部140は、側杆部131の凹部131a内に後方から差し込まれている。座連結部140は、側杆部131に対して左右方向の内側からビス等が締結されることで、側杆部131に固定されている。
枢軸部142は、左右方向に延びる棒状に形成されている。枢軸部142は、座連結部140の後端部及び背連結部141の前端部との重ね合わせ部分を左右方向に貫通している。したがって、座連結部140及び背連結部141は、枢軸部142の軸線O1回りに回動可能に構成されている。
下部フレーム150は、側杆部131の後端に連結部材121を介して連結されている。下部フレーム150は、後方に向かうに従い上方に向けて傾斜している。下部フレーム150の前端面には、前方に向けて開口する凹部150aが形成されている。凹部150a内には、背連結部141が差し込まれている。背連結部141は、下部フレーム150に対して左右方向の内側からビス等が締結されることで、下部フレーム150に固定されている。
一対の縦杆部155は、各下部フレーム150の後端から、それぞれ上方に向けて延びている。側面視において、縦杆部155は、上方に向かうに従い前方に向けて延びた後、さらに上方に向かうに従い後方に延びている。
上杆部157は、一対の縦杆部155の上端部同士を左右方向に架け渡している。
接続フレーム160は、各下部フレーム150から左右方向の内側に向けて延びている。接続フレーム160は、左右方向の内側に向かうに従い下方に湾曲しながら延びている。
規制壁部165は、左右方向に延びている。
前突出部167は、規制壁部165における左右方向の両端部から前斜め下方に延びている。
図8に示すように、前突出部167の前端部の内側面には、保持部168が形成されている。保持部168は、前突出部167において左右方向の内側に向けて開口する凹部である。保持部168は、背凭れ支持軸52のうち、後部ケース33から突出した部分を保持している。これにより、背フレーム123は、背凭れ支持軸52を支点にして左右方向に沿う軸線O2回りに回動可能に支持されている。保持部168は、前突出部167の前端面上で開口する挿入開口部(開口部)168aを有している。保持部168内には、挿入開口部168aを通じて背凭れ支持軸52が挿入可能である。挿入開口部168aは、保持部168内に背凭れ支持軸52が収容された状態において、軸線O2の径方向(交差方向)に開口している。
図9に示すように、椅子本体3の角度θが第1角度よりも小さい第2角度にあるとき、突起173は抜け止め部170から離脱している(組付位置)。組付位置では、突起173の全体が保持部168内に位置することにより、抜け止め部170との係合(接触)が解除される。すなわち、組付位置では、背凭れ支持軸52に対する背フレーム123の軸線O2の径方向(後方)への移動が許容される。その結果、背凭れ支持軸52及び突起173が保持部168から離脱可能に構成されている。なお、突起173は、組付位置における保持部168内への進入量が、使用位置における保持部168内への進入量よりも大きければよい。
軸部181aは、前後方向に延びる棒状に形成されている。上述した後部ケース33の後壁部33aにおいて、縦溝180と前後方向に対向する位置には、後壁部33aを貫通する挿通孔33cが形成されている。軸部181aは、挿通孔33cを通じて後壁部33aを貫通している。軸部181aの先端部(後端部)は、後部ケース33から後方に突出している。軸部181aの先端部は、縦溝180内に進入している。戻りストッパ181は、軸部181aが縦溝180の下面(内面のうち上方を向く面)に上方から係合(接触)することで、背フレーム123の組付位置への回動を規制している。
摘み部181cは、フランジ部181bから上方に向けて突出している。
次に、上述した椅子1の使用方法として、椅子本体3をリクライニングさせる際の作用について説明する。以下の説明では、進退片74が退避位置にある状態を初期状態として説明する。図11は、背凭れ101のリクライニング状態を示す椅子1の側面図である。
本実施形態の椅子1は、支基12(ケーシング21)を固定リンクとし、背フレーム123を回動リンクとし、座フレーム120をスライドリンクとしたリンク機構を構成している。具体的に、椅子本体3に着座者が着座した状態で、背凭れ101に凭れ掛かると、椅子本体3には背凭れ101を介して後方への荷重が作用する。すると、図11に示すように、背凭れ101は、支基12に対して軸線O2回りの後方に回動する。すると、背凭れ101は、座100に対して軸線O1回りの後方に回動する。これにより、座100は、背凭れ101の回動に伴い後方に引っ張られる。この際、座100は、スライダ51によって上下方向の移動が規制された状態で、前後方向に移動可能に構成されているため、背凭れ101の回動に伴い支基12に対して後方にスライド移動する。また、座係合部132が後方に向かうに従い下方に向けて延在していることから、座100は後方に向かうに従い下方に向けて移動する。その結果、椅子本体3の全体が後方に移動しつつ、背凭れ101が後方にリクライニングされる。また、背凭れ101のリクライニング時において、座100が後方に移動するのに従い、付勢部材201,203が弾性変形する。これにより、付勢機構200の付勢力が増加する。
進退片74を突出位置に移動させるには、傾動調整機構24の操作ロッド62を回転させる。すると、操作ロッド62の回転運動が第1アーム71を介して第2アーム72に伝達されることで、第2アーム72及び進退片74の直進運動に変換される。これにより、進退片74がスライド空間S1内を後方に向けてスライドする。その結果、進退片74がケーシング21から後方に突出して傾動規制部190内に進入する。この状態で、背凭れ101をリクライニングさせようとすると、傾動規制部190の頂面が進退片74に上方から当接することで、背凭れ101の回動が制限される。
次に、椅子1の組立方法として、支基12に対して椅子本体3を組み付ける方法について説明する。図12は、椅子本体3が組付位置にある状態を示す椅子1の側面図である。
まず、図12に示すように、シェル110を組付位置とした状態で、座フレーム120と支基12とを連結する。具体的には、図5に示すように、座係合部132の後端開口部132a及びスリット開口132eを通じて座係合部132内にスライダ51を挿入する。この際、スライダ51の柱部58をスリット132c内に進入させ、上壁部59を座係合部132内に進入させる。
以上により、支基12に対して座フレーム120が組み付けられる。
このように、本実施形態の椅子1では、座フレーム120と背フレーム123とが第1軸線O1回りに回動可能に組み付けられた構成において、支基12が、座フレーム120を前後方向に移動可能に支持するスライダ51と、背フレーム123を第2軸線O2回りに回動可能に支持する背凭れ支持軸52と、を備えている構成とした。
この構成によれば、支基12に対する背凭れ101の軸線O2回りの回動に伴い、座100(座フレーム120)に対して背凭れ101(背フレーム123)が軸線O1回りに回動するとともに、支基12に対して座100が前後方向にスライド移動する。これにより、従来のように背凭れの後方への回動に伴い座の前端部が持ち上がる構成に比べ、背凭れ101の後方への回動に伴う座100の上下方向への移動を抑えることができる。すなわち、背凭れ101の回動に伴い、座100を前後方向に滑らかに移動させることができるので、リクライニング時に着座者に与える違和感を軽減できる。
この構成によれば、座フレーム120及び背フレーム123とは別体の連結部材121を用いることで、椅子本体3の強度を確保した上で、座フレーム120に対する背フレーム123の回動量等を調整し易い。
この構成によれば、椅子本体3を組付位置とした状態で、保持部168と背凭れ支持軸52とを軸線O2の径方向に接近又は離反させることで、挿入開口部168aを通じて背凭れ支持軸52を保持部168に着脱することができる。一方、背凭れ支持軸52が保持部168内に収容された状態で、椅子本体3を使用位置とすることで、背凭れ支持軸52が挿入開口部168aを通じて保持部168から離脱するのを抑制できる。これにより、座100と背凭れ101とが一体に組み合わされた構成であっても、組付性を向上させることができる。
この構成によれば、背フレーム123を支基12に組み付けた後、背フレーム123が組付位置に戻るのを規制できる。これにより、組付性と、組付後の信頼性の双方を確保できる。
この構成によれば、座係合部132の後端開口部132aを通じてスリット132c内にスライダ51を挿入することができる。これにより、座フレーム120の支基12への組付性を向上させることができる。
以上、本開示の好ましい実施形態を説明したが、本開示はこれら実施形態に限定されることはない。本開示の趣旨を逸脱しない範囲で、構成の付加、省略、置換、及びその他の変更が可能である。本開示は上述した説明によって限定されることはなく、添付の特許請求の範囲によってのみ限定される。
上述した実施形態では、座フレーム120と背フレーム123とが連結部材121を介して回動可能に連結された構成について説明したが、この構成に限られない。連結部材としては、座フレーム120と背フレーム123とを回動可能に連結する枢軸部のみを有する構成であってもよい。また、連結部材が折り曲げ可能な構成であってもよい。さらに、椅子本体3は、連結部材を有さない構成であってもよい。この場合、座フレーム120と背フレーム123とが折り曲げ可能に一体に形成されていてもよい。
上述した実施形態では、座フレーム120とケーシング21との間に介在する付勢機構200として線材からなる第1付勢部材201、及びコイルスプリングからなる第2付勢部材203を備える構成について説明したが、この構成に限られない。付勢機構200は、第1付勢部材201及び第2付勢部材203の何れかを備える構成であってもよい。
上述した実施形態では、第1支持部としてブロック状のスライダ51を採用し、座フレーム120にスリット132cが形成された構成について説明したが、この構成に限られない。第1支持部は、座フレーム120を前後方向に移動可能に支持していればよい。この場合、第1支持部をスリットとし、スリット内を移動可能なスライダ等を座フレーム120に設けてもよい。第1支持部と座フレーム120とは、レールとローラとの組み合わせ等であってもよい。
上述した実施形態では、戻りストッパ181が支基12に設けられた構成について説明したが、この構成に限られない。戻りストッパ181は、背フレーム123に着脱可能に設けられて、支基12に係合する構成であってもよい。
上述した実施形態では、椅子本体3(シェル110)のうち、座フレーム120が座100の外殻を構成し、背フレーム123が背凭れ101の外殻を構成する場合について説明した。但し、座100の一部の外殻を構成する第1部材と、背凭れ101外殻の一部を構成する第2部材と、によって椅子本体3の外殻が形成されていてもよい。例えば座フレーム120が、座100の前半部分を構成し、背フレーム123が座100の後半部分及び背凭れ101を構成していてもよい。この場合、座フレーム120は、椅子本体3の前端を含み、座100の全長に対して1/2以上の領域を構成し、背フレーム123は椅子本体3の上端を含んでいることが好ましい。
2…支持構造体
3…椅子本体
51…スライダ(第1支持部)
52…背凭れ支持軸(第2支持部)
100…座
121…連結部材
132c…スリット
132e…スリット開口(他の開口部)
168…保持部
168a…挿入開口部(開口部)
170…抜け止め部
181…戻りストッパ(規制部)
Claims (5)
- 支持構造体と、
前後方向に延びて座の少なくとも一部を構成する第1部材、及び前記第1部材の後端に左右方向に沿う第1軸線回りに回動可能に設けられ、前記第1部材から上方に延びて背凭れの少なくとも一部を構成する第2部材を有する椅子本体と、を備え、
前記支持構造体は、
前記第1軸線の前方において前記第1部材を前後方向に移動可能に支持する第1支持部と、
前記第1軸線の下方において前記第2部材を左右方向に沿う第2軸線回りに回動可能に支持する第2支持部と、を備えている椅子。 - 前記椅子本体は、前記第1部材及び前記第2部材を前記第1軸線回りに回動可能に連結する連結部材を備えている請求項1に記載の椅子。
- 前記椅子本体は、前記第1部材と前記第2部材との前記第1軸線回りのなす角度が第1角度となる第1位置と、前記第1部材と前記第2部材との前記第1軸線回りのなす角度が前記第1角度よりも小さい第2角度となる第2位置と、の間を回動可能に構成され、
前記第2支持部は、前記第2軸線に沿って延びる軸部材であり、
前記第2部材は、
前記第2軸線に交差する交差方向に向けて開口して前記第2支持部が挿入可能な開口部を有し、前記第2支持部を保持する保持部と、
前記椅子本体が前記第1位置にあるときに前記交差方向で前記支持構造体に係合して、前記支持構造体に対する前記第2部材の前記交差方向での移動を規制し、前記椅子本体が前記第2位置にあるときに前記支持構造体から離脱して、前記支持構造体に対する前記第2部材の前記交差方向への移動を許容する抜け止め部を備えている請求項1又は請求項2に記載の椅子。 - 前記第2部材及び前記支持構造体の一方の部材には、前記椅子本体が前記第1位置にあるとき、前記第2部材及び前記支持構造体の他方の部材に係合して、前記第1軸線回りにおける前記椅子本体の前記第2位置への回動を規制する規制部が着脱可能に設けられている請求項3に記載の椅子。
- 前記第1部材には、前後方向に開口して前記第1支持部が挿入可能な他の開口部を有し、前後方向に延びるスリットが形成され、
前記第1支持部は、前記スリット内を前後方向に移動可能に構成されている請求項1から請求項4の何れか1項に記載の椅子。
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JPS63186605A (ja) * | 1986-10-15 | 1988-08-02 | ロルフ・フェルクレ | 椅子 |
JP2008212622A (ja) * | 2007-02-05 | 2008-09-18 | Takano Co Ltd | 椅子 |
JP2012135398A (ja) * | 2010-12-27 | 2012-07-19 | Kokuyo Co Ltd | 椅子 |
JP2015096162A (ja) * | 2013-11-15 | 2015-05-21 | タカノ株式会社 | 椅子のロッキング機構および椅子 |
JP2018533394A (ja) | 2016-09-01 | 2018-11-15 | 永藝家具股▲ふん▼有限公司 | 椅子の構造及び椅子 |
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JPS63186605A (ja) * | 1986-10-15 | 1988-08-02 | ロルフ・フェルクレ | 椅子 |
JP2008212622A (ja) * | 2007-02-05 | 2008-09-18 | Takano Co Ltd | 椅子 |
JP2012135398A (ja) * | 2010-12-27 | 2012-07-19 | Kokuyo Co Ltd | 椅子 |
JP2015096162A (ja) * | 2013-11-15 | 2015-05-21 | タカノ株式会社 | 椅子のロッキング機構および椅子 |
JP2018533394A (ja) | 2016-09-01 | 2018-11-15 | 永藝家具股▲ふん▼有限公司 | 椅子の構造及び椅子 |
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