JP2014057761A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair capable of regulating a seat from moving in the lateral direction to a seat support frame as a seat support member, and largely securing an amount of bending deformation to the lower side of the seat to improve the seating comfort.SOLUTION: The lower surface of one side part of a back plate 12 a little inside from a fitting groove 25 of the back plate 12 is provided with a movement regulating part 28 for regulating the lateral movement of the back plate 12 by abutting on or approaching the side of an upward projecting part 14 provided on the top face of a seat supporting frame 11 with the fitting groove 25 fitted in an outward fitting piece 23 of the seat supporting member 11. The lower surface of the other side part of the back plate 12 is served as a deformation allowing part 29 for allowing sideward bending deformation of the back plate 12 to the seat supporting frame 11.

Description

  According to the present invention, fitting grooves provided on both side portions of the seat are fitted to the fitting pieces in the front and rear directions provided on the left and right sides of the seat support frame at the upper portion of the leg so as to be slidable in the front and rear directions. The present invention relates to a chair that supports a seat so as to be movable in the front-rear direction by a seat support frame.

  Thus, the structure that supports the seat movably in the front-rear direction on the seat support frame by fitting the fitting piece and the fitting groove, while sliding the seat in the front-rear direction on the seat support frame, Since it is not only easy to attach as detachable, but also has the advantage of preventing the seat from coming off after the attachment, it is used relatively often (see, for example, Patent Documents 1 to 3).

Japanese Patent No. 3967150 (FIGS. 13 and 21) Japanese Patent Laying-Open No. 2008-302083 (FIG. 11) Japanese Patent Laying-Open No. 2008-183074 (FIG. 4)

In the chairs described in Patent Documents 1 and 2, both of the fitting pieces provided on the seat support frame (intermediate support body and side frame) side are provided in the fitting grooves provided on the seat side in the front-rear direction. Are slidably fitted to each other so as to prevent the seat from rattling in the left-right direction and increase the mutual fitting strength. Therefore, particularly in a chair with a small left-right dimension of the seat, the amount of bending deformation of the seat below is limited, and the seating comfort may be deteriorated.
The chair described in Patent Document 3 is provided with an elastic engagement piece on one side of the seat side, and this elastic engagement piece is elastically deformed inward by a fitting piece (engagement piece) of the seat support frame. The fitting piece is fitted in the fitting groove formed in the back of the elastic engagement piece, and the side frames of the seat support frame are loosely fitted in the recesses provided on the lower surfaces of the both side portions of the seat plate. Therefore, when the seat plate is elastically deformed downward, the seat may shake in the left-right direction with respect to the seat support frame.

  The present invention has been made in view of the above-described problems, and can restrain the seat from moving in the left-right direction with respect to the seat support frame, and can ensure a large amount of bending deformation below the seat. To provide a chair that can improve comfort and that can restrict the movement of the seat in the left-right direction by simple means and that can ensure a large amount of bending deformation below the seat. It is an object.

According to the present invention, the above-mentioned problems are solved as follows.
(1) A leg, a seat support member supported by the leg and having front and rear outward fitting pieces at both left and right ends, and supported by the seat support member and fitted to the left and right sides. In a chair provided with an elastically deformable seat having a fitting groove in the front-rear direction that fits in the mating piece, the fitting groove is formed outwardly on the lower surface of one side of the seat on the inner side of the fitting groove. A movement restricting portion that restricts movement of the seat in the left-right direction by being in contact with or close to the inner surface of the upward protrusion provided on the upper surface of the seat support member in a state of being fitted to the fitting piece. And the lower surface of the other side portion of the seat is a deformation allowing portion that allows the seat supporting member to bend and deform in the lateral direction of the seat.

According to such a configuration, the seat support member is provided by providing the movement restricting portion on the lower surface of the one side portion of the seat and using the lower surface of the other side portion as a deformation-permitting portion that allows bending deformation to the side of the seat. On the other hand, the seat can be easily elastically deformed downward to a preferred shape in a state where the seat is prevented from moving in the left-right direction and the seat is prevented from rattling in the left-right direction. Therefore, it is possible to secure a large amount of bending deformation downward of the seat and improve the sitting comfort.
Further, since the seat can be restrained from moving in the left-right direction and elastically deform downward, the fitting groove of the seat is closely fitted to the outward fitting piece of the seat support member, and the fitting strength thereof is increased. Can be great.

(2) In the above item (1), the forward protrusion in the front-rear direction protruding from the lower surface of the seat is used as a movement restricting portion, and the outer surface of the downward protrusion is in contact with the inner surface of the upward protrusion. Or make it close.

  According to such a configuration, when the seat is elastically deformed laterally and downward, the downward projection of the seat strongly contacts the upward projection of the seat support member from the outside, so the seat is laterally Is reliably prevented from moving to.

(3) In the above paragraph (1) or (2), the front and rear guide portions having outward fitting pieces at the outer ends are provided on the left and right side portions of the seat support member so as to protrude toward the seat side. The guide part is fitted in the front and rear concave grooves provided on the lower surfaces of both sides of the seat, and the outward fitting pieces of the left and right guide parts are provided on the inner side surfaces of the outer walls of the left and right concave grooves. The inner wall of one of the left and right concave grooves is used as a movement restricting portion, and the left and right guide portion is an upward projecting portion, and the inner side wall is the outer surface of the guide portion. Abut or close.

According to such a configuration, the inner wall of the concave groove provided on the lower surface of the seat also serves as the movement restricting portion, and the guide portion provided on the upper surface of the seat support member also serves as the upward protrusion. There is no need to separately provide the projecting portion on the seat and the seat support member, and the seat can be restricted from moving in the left-right direction by simple means.
In addition, since the inner wall and the guide portion of the concave groove have a large rigidity, there is no possibility of being deformed to the side even if they are in strong contact.

(4) In the above item (4), the left and right dimension of the left and right guide part is smaller than that of the one guide part, and the inner wall of the left and right concave groove of the seat is the other guide part. By being separated from the inner surface of the part, a deformation permitting part that allows bending deformation to the side of the seat is obtained.

  According to such a configuration, the right and left dimension of either the left or right guide part is smaller than that of the one guide part, and the inner wall of the groove is simply separated from the inner surface of the guide part. The lower surface of the other side portion of the seat can be easily set as a deformation allowing portion.

  According to the present invention, the seat support frame as the seat support member can be restricted from moving in the left-right direction, and the amount of bending deformation of the seat below can be secured to improve the seating comfort. A chair can be provided.

It is a side view of one Embodiment of the chair of this invention. Similarly, it is an expansion exploded perspective view of a seat. Similarly, it is the expansion perspective view which looked at the seat support frame and the seat board from the lower part. Similarly, it is a bottom view of a state where a seat plate is attached to the seat support frame. FIG. 5 is an enlarged front end view longitudinally cut along line VV in FIG. 4 and inverted upside down. FIG. 5 is an enlarged front end view, similarly cut vertically along the line VI-VI in FIG. 4 and inverted upside down. FIG. 5 is an enlarged front end view of the same portion as FIG. 4 when the seat plate is bent.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a chair according to the present invention, and this chair is erected in the center of the leg 3 with a leg 3 having five radial rods 2 having a caster 1 at the tip, A telescopic leg column 5 in which a gas spring 4 is housed, a seat support 6 facing the front upper side with the rear end supported by the upper end of the leg 5, and a seat supported by the seat support 6 7, a pair of left and right back support rods 9 which are pivotally attached to the seat support 6 with a pair of left and right pivots 8 whose front end portions are directed in the left and right directions, and rear end portions of both back support rods 9 And a backrest 10 supported by.

  The backrest 10 is integrated with the left and right backrest support rods 9 and pivots around a pivot axis 8 from a standing position standing behind the seat 7 to an appropriate rearward tilt position (not shown). It can be done. The seat support 6 accommodates an urging means linked to the pivot 8 for urging the backrest 10 always forward, an urging force adjusting mechanism, and the like. The illustration and detailed description are omitted.

  As shown in FIG. 2, the seat 7 has a seat support frame 11 made of synthetic resin having a frame shape in plan view as a seat support member in the present invention, and a generally square shape in plan view supported by the seat support frame 11. The seat plate 12 is made of a flexible synthetic resin, and the cushion body 13 is mounted on the seat plate 12 so as to cover the upper surface and the outer peripheral surface of the seat plate 12.

  The seat support frame 11 includes a pair of left and right guide portions 14 and 14 that face in the front-rear direction (the left front in FIG. 2 is the front), a front connection rod 15 that connects the front end portions, and left and right guide portions 14. 14 and a rear connecting rod 16 that connects the rear end portions of the four, and the whole is integrally formed of a hard synthetic resin that is not easily elastically deformed. Note that the left and right guide portions 14, 14 are arranged from the upper surfaces of the front connection rod 15 and the rear connection rod 16 so as to serve as upward protrusions that oppose the movement restricting portion 28 and the deformation allowing portion 29 described later in the left-right direction. Also protrudes upward, that is, toward the seat plate 12 side. Further, when the left and right guide portions 14, 14 protrude toward the seat plate 12 and support the lower surfaces of both side portions of the seat plate 12, the lower surface of the seat plate 12 is separated from the upper surfaces of the front connecting rod 15 and the rear connecting rod 16. As a result, the seat plate 12 can be elastically deformed greatly downward (see FIG. 7).

  Near the center in the left-right direction of the front connecting rod 15, a pair of left and right elongated holes 17, 17 that are long in the front-rear direction are provided. Bolts (not shown) penetrating both the long holes 17 are screwed to the upper surface of the front portion of the seat support 6 with a pair of left and right receiving plates (not shown) whose upper surface forms an arc surface. Thus, the front portion of the seat support frame 11 can slide in the front-rear direction along the arc surface of the upper surface of the backing plate without being displaced upward from the upper surface of the seat support 6. A plurality of vertically long slits 18 for adjusting the front-rear position of the seat 7 by selectively engaging engagement claws of an operation lever (not shown) on the front right side surface of the right guide portion 14, They are arranged side by side in the front-rear direction.

  As shown in FIG. 1, a pair of left and right downward projecting pieces 19, 19 (see FIG. 3) hanging from the rear lower surfaces of the left and right guide portions 14, 14 in the seat support frame 11, and left and right backrest support rods 9. The seat 7 including the seat support frame 11 and the seat plate 12 supported on the seat support frame 11 is connected to the upward projecting piece 20 that stands up from a portion slightly rearward from the front end of the seat with the shaft 21 facing in the left-right direction. In synchronization with the back tilt of the backrest 10, the rear part moves rearward and downward, and the front part tilts rearward and downward while sliding backward along the upper surface of the seat support 6.

As shown in FIGS. 3 to 6 (the cushion body is not shown), the lower surfaces of the left and right side portions of the seat plate 12 are fitted to the left and right guide portions 14 and 14 of the seat support frame 11, and the seat plate 12 Are provided with a pair of left and right recessed grooves 22 and 22 facing in the front-rear direction so that they can slide in the front-rear direction within a certain range.
Since the left and right concave grooves 22 and 22 are provided slightly inward from the left and right side ends of the lower surface of the seat plate 12, the left and right guide portions 14 and 14 are positioned inward from the both side ends of the seat plate 12. doing.

The outer edge of each concave groove 22 is engaged with a plurality of outward fitting pieces 23 in the front-rear direction provided on the outer edge of the guide part 14 fitted in the concave groove 22, so that the guide part 14 is in the concave groove 22. A plurality of front and rear inward engaging protrusions 24 are provided so as to prevent them from being detached downward from the front. In this example, three outward fitting pieces 23 are provided at regular intervals at the front and rear end portions and the central portion of the outer edge of each guide portion 14, and the front and rear end portions of the outer edge of each concave groove 22 are provided. In the removed portion, three engagement protrusions 24 having a length in the front-rear direction longer than the outward engagement piece 23 can be inserted into and removed from between the adjacent engagement protrusions 24. Thus, it is provided at regular intervals in the front-rear direction.
By providing such an engagement protrusion 24, the inner surface of the outer wall 22a of the left and right concave grooves 22, 22 is fitted to each outward fitting piece 23 so as to be slidable in the front-rear direction. Fitting grooves 25, 25 in the front-rear direction having an inwardly U-shaped cross section that opens toward the front are formed (see FIG. 5).

  The upper wall of each concave groove 22 in the seat plate 12 contacts the rear end of the guide portion 14 when the seat plate 12 reaches the front limit position with respect to the seat support frame 11, and that of the seat plate 12. The pair of left and right elastic engagement pieces 26, 26 that prevent the forward movement described above are provided so as to protrude into the concave groove 22 and be elastically deformed upward.

In order to attach the seat plate 12 to the seat support frame 11, the left and right elastic engagement pieces 26, 26 are elastically deformed upward, and the rearward outward fitting piece 23 is connected to the rearmost engagement protrusion of the seat plate 12. From the gap between the piece 24 and the rear wall of the concave groove 22, the two outward fitting pieces 23, 23 on the front side are respectively recessed from the gap between the engagement protrusions 24, 24 adjacent to the front and rear. After the insertion, the seat plate 12 is slid backward with respect to the seat support frame 11 until the both elastic engagement pieces 26 are elastically restored downward. Then, as shown in FIG. 5, each outward fitting piece 23 moves to the fitting groove 25 of the seat plate 12 and is fitted thereto, thereby preventing the guide portion 14 from being detached downward from the concave groove 22. Is done. As a result, the seat plate 12 has a front limit position where the elastic engagement piece 26 contacts the rear ends of the guide portions 14, 14 of the seat support frame 11, and a front end of the guide portion 14 contacts the front wall of the groove 22. The seat support frame 11 can be moved in the front-rear direction between the rear limit positions.
If the elastic engagement piece 26 is elastically deformed upward and the seat plate 12 is slid to the front limit position, the engagement between the outward fitting pieces 23 and the engagement protrusions 24 is released. By simply lifting the seat plate 12 upward, the seat support frame 11 can be easily removed.

In this way, when the seat plate 12 is attached to the seat support frame 11, each of the right outward fitting pieces 23 is fitted in the right concave groove 22 in a state where no downward load is applied to the seat plate 12. The left side outward fitting piece 23 is slightly spaced from the inner surface of the fitting groove 25 in the left concave groove 22 so as to be fitted to the groove 25 while being restricted from moving to the right side. It is fitted (see FIG. 5).
Further, a required gap between the upper ends of the left and right guide portions 14, 14 and the lower surfaces of the left and right concave grooves 22, 22 is such that both side portions of the seat plate 12 can be slightly elastically deformed downward when seated. Is formed.

  As shown in FIGS. 2, 5, and 6, the front and rear end portions of the right guide portion 14 projecting upward from the upper surfaces of the front connection rod 15 and the rear connection rod 16 have a guide portion 14. By projecting a part of the inner side surface inwardly, front and rear inward protrusions 27, 27 are formed so that the inner side surface forms a substantially vertical surface. As a result, the left and right guide portions 14 and 14 are asymmetrical, and the left and right guide portions 14 have a left and right dimension that is smaller than the left and right dimensions of the inward projecting portion 27 forming portion of the right guide portion 14.

  The rib-like downward projections 22 c projecting from the inner wall 22 b of the right concave groove 22 and the lower end of the inner wall 22 b in the seat plate 12 are inward of the front and rear inward projections 27. , 27 is a movement restricting portion 28 that abuts or approaches the inner side surface of the left side from the left side. When such a movement restricting portion 28 is provided, as described above, each of the right outward fitting pieces 23 in the seat support frame 11 is restricted from moving rightward in the fitting groove 25 of the right concave groove 22. Thus, the seat plate 12 is restricted from moving in the left-right direction with respect to the seat support frame 11, and rattling is prevented from occurring in the left-right direction.

  As shown in FIGS. 5 and 6, a rib-like downward projection 22 c is provided at the lower end of the inner wall 22 b of the left groove 22, and the downward protrusion 22 c and the inner wall of the groove 22 are provided. The lower surface of the left side portion of the seat plate 12 including 22b serves as a deformation allowing portion 29 that allows bending deformation outward and downward of the seat plate 12. In other words, the deformation allowing portion 29 is separated from the upper surface of the seat support frame 11 and is separated from the inner side surface of the left guide portion 14 to the right side to form the bending space S, so that the deformation allowing portion 29 is seated. There is no interference with the inner surface of the guide portion 14 of the support frame 11. Therefore, it is possible to ensure a large amount of bending deformation of the inner portion of the seat plate 12 than the guide portion 14 and improve the sitting comfort.

  FIG. 7 shows a state in which the seat plate 12 is elastically deformed downward at the time of sitting. When a seat occupant's body pressure is applied to the seat plate 12, the lower surfaces of both sides thereof are left and right of the seat support frame 11. While being in contact with the upper end of the guide portion 14, the central portion of the seat plate 12 is greatly elastically deformed downward with both guide portions 14 as fulcrums. Then, by pulling the both side ends of the seat plate 12 toward each other, the inner surface 22b of the fitting groove 25 of the seat plate 12, that is, the inner side walls 22b of the left and right concave grooves 22, 22, is seat support frame 11. Strongly contact the outer ends of the left and right outward fitting pieces 23, 23. Thereby, the outward fitting piece 23 closely engages with the fitting groove 25, and the fitting strength thereof increases. Further, when the seat plate 12 is elastically deformed downward, the inner wall 22b and the downward projecting portion 22c of the right concave groove 22 strongly come into contact with the inner surface of the inward projecting portion 27 of the right guide portion 14, so that the seat plate 12 is prevented from moving in the left-right direction, and is stably supported by the guide portion 14.

  On the other hand, since the lower surface of the left side portion of the seat plate 12 is used as the deformation allowing portion 29 and the bending space S is provided between the seat supporting frame 11 and the guide portion 14, as described above, the deformation allowing portion 29 is the guide portion. Therefore, the central portion excluding both side portions of the seat plate 12 can be easily elastically deformed downward into a preferable shape.

The present invention is not limited to the above embodiment.
In the above-described embodiment, the inward protrusions 27 and 27 are provided at both front and rear ends of the right guide part 14, and the inner wall 22 b and the downward protrusion of the concave groove 22 that is the movement restricting part 28 are provided on the inner side surfaces thereof. Although 22c is contacted or brought close to, the inward protruding portion 27 that is slightly longer in the front-rear direction may be provided only in the center portion of the guide portion 14 in the front-rear direction. Further, instead of providing the inward projecting portion 27, the entire inner side portion of the right guide portion 14 may be bulged inward to increase the lateral dimension.

  In the above-described embodiment, the concave grooves 22 provided on the lower surfaces of the both side portions of the seat plate 12 are fitted to the guide portions 14 provided on the left and right sides of the seat support frame 11, and the inner side wall 22b and the lower side of the right concave groove 22 are fitted. The direction protrusion 22c is used as the movement restricting portion 28 so as to be in contact with or close to the inner surface of the right guide portion 14 that also serves as the upward protrusion. However, the guide portion 14 and the concave groove 22 are not provided. Further, a movement restricting portion 28 including a downward protruding portion may be provided on the upper surface of the right side portion of the seat support frame 11 and the lower surface of the right side portion of the seat plate 12.

  In the above embodiment, the seat support frame 11 has a rectangular frame shape, but the lower portions of the left and right guide portions 14 are connected to each other by a plate-like member, and the overall shape is a plate shape in plan view. Also good.

  The present invention can also be applied to a chair in which the seat plate 12 does not slide in the front-rear direction with respect to the seat support frame 11 or a chair having only the seat plate 12 without the cushion body 13.

DESCRIPTION OF SYMBOLS 1 Caster 2 Leg rod 3 Leg body 4 Gas spring 5 Pillar 6 Seat support body 7 Seat 8 Axis 9 Backrest support rod 10 Backrest 11 Seat support frame (seat support member)
12 Seat plate 13 Cushion body 14 Guide part (upward protrusion)
15 front connecting rod 16 rear connecting rod 17 long hole 18 slit 19 downward projecting piece 20 upward projecting piece 21 shaft 22 concave groove 22a outer wall 22b inner side wall 22c downward projecting portion 23 outward fitting piece 24 engaging projecting piece 25 fitting groove 26 elastic engagement piece 27 inward projecting portion 28 movement restricting portion 29 deformation allowing portion S deflection space

Claims (4)

Legs and
A seat support member that is supported by the legs and has outward fitting pieces in the front-rear direction at both left and right ends,
In a chair that is supported by this seat support member, and that has elastically deformable seats having fitting grooves in the front-rear direction that fit in the outward fitting pieces on both left and right sides,
An upward protrusion provided on the upper surface of the seat support member in a state where the fitting groove is fitted to the outward fitting piece on the lower surface of one side portion of the seat on the inner side of the fitting groove. A movement restricting portion that restricts the movement of the seat in the left-right direction by contacting or approaching the inner side surface is provided, and the lower surface of the other side portion of the seat is placed on the side of the seat with respect to the seat support member. A chair characterized by being a deformation-permitting portion that allows bending deformation.   2. A downward projecting portion projecting on the lower surface of the seat is defined as a movement restricting portion, and an outer surface of the downward projecting portion is in contact with or in close proximity to an inner surface of the upward projecting portion. The chair described in.   Front and rear guide portions with outward fitting pieces on the outer ends are provided on both left and right sides of the seat support member so as to protrude to the seat side, and both guide portions are provided on the lower surfaces of both side portions of the seat. And fitting the outward fitting pieces of the left and right guide portions to the fitting grooves provided on the inner surface of the outer wall of the left and right concave grooves. The inner wall of the groove is used as a movement restricting portion, and either one of the left and right guide portions is used as an upward protrusion, and the inner wall is brought into contact with or close to the outer surface of the guide portion. Chair.   By making the left and right dimension of the left and right guide part smaller than that of one guide part, by separating the inner side wall of the left and right other concave groove of the seat from the inner side surface of the other guide part, The chair according to claim 3, wherein the chair is a deformation-permitting portion that allows bending deformation of the seat to the side.

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