JP5767010B2 - Chair - Google Patents

Description

  The present invention relates to a chair formed by stretching a tension material on a seat frame.

In recent years, in consideration of breathability and design, many chairs have been used in which a seat or backrest is formed by stretching a tension material made of fabric or mesh material on the seat frame or back frame. Yes.
In such a chair with a tension member stretched on the seat frame, the lower surface of the tension member when the tension member is pushed down to the seat frame in order to compensate for the lack of strength or tension of the tension member. In some cases, an elastic support piece (flexible tongue piece or support piece) is provided integrally with the tension member so as to push up the tension member (see, for example, Patent Documents 1 to 3).

Japanese Patent No. 4202688 Japanese Patent No. 4497629 US Pat. No. 6,702,390

  However, since the conventional chair as described above has the elastic support piece formed integrally with the seat frame, the mold for forming the seat frame becomes complicated, and depending on the shape and position of the elastic support piece, In some cases, molding cannot be performed in one step, and multiple steps must be performed.

  The present invention has been made in view of the above problems, and by forming the elastic support piece as a separate body from the seat frame, the structure of the mold for forming the seat frame can be simplified and the manufacturing cost can be reduced. An object of the present invention is to provide a chair that can simplify the structure of the seat frame and the elastic support piece and can be easily attached to the seat frame.

According to the present invention, the above problem is solved as follows.
(1) A leg, a seat frame supported by the leg, a tension member stretched on the seat frame, and a plurality of projecting pieces on an edge, the seat frame or the leg, or those An elastic support piece that protrudes inward of the seat frame by supporting the protruding piece in between and presses against the lower surface of the upholstery material and pushes up the upholstery material when the upholstery material is pushed down. In addition, a recess that opens rearward is provided on the rear surface of the front frame ridge facing the left-right direction in the seat frame, and a protruding piece that protrudes forward is provided on the upper front edge of the leg body. By fitting a protrusion provided on the front edge of the elastic support piece into the gap above the protrusion in the recess, the front frame of the leg frame is fitted into the recess. Ru attaching the front and an elastic supporting piece.

With such a configuration, since the elastic support piece can be formed separately from the seat frame, the structure of the seat frame molding die can be simplified, the manufacturing cost can be reduced, and the seat frame can be reduced. The structure of the frame and the elastic support piece can be simplified, and the elastic support piece can be easily attached to the seat frame with the protruding piece.
Further, the recessed portion provided on the rear surface of the front frame rod in the seat frame can perform both the attachment of the seat frame to the leg and the attachment of the elastic support piece to the seat frame or the leg.

(2) In the above item (1) , the rear portion of the seat frame is brought into contact with the upper surface of the leg and is fastened by fastening means.

  With such a configuration, after the concave portion provided on the rear surface of the front frame collar in the seat frame is engaged with the projecting piece provided on the upper front edge of the leg body, the rear portion of the seat frame contacts the upper surface of the leg body. The seat frame can be easily attached to the leg body by being brought into contact with each other and fastened by the fastening means.

(3) In the above item (1) or (2) , by providing protrusions on the front edge or rear edge of the elastic support piece and the left and right side edges, and fitting each protrusion into the corresponding recess, The support piece cannot be moved back and forth and left and right with respect to the seat frame.

  With such a configuration, it is possible to prevent the elastic support pieces from being positioned and rattling without providing fastening means or the like.

(4) In any one of the above items (1) to (3) , the size of the elastic support piece in the left-right direction is substantially the same as the distance between the pair of left and right side frame ribs facing the front-rear direction in the seat frame. Item 4. The chair according to any one of Items 1 to 3 .

  With such a configuration, it is possible to surely prevent the elastic support pieces in the seat frame from being displaced in the left-right direction and rattling.

  According to the present invention, by forming the elastic support piece separately from the seat frame, not only can the structure of the mold for forming the seat frame be simplified and the manufacturing cost can be reduced, but also the structure of the seat frame and the elastic support piece can be reduced. It is possible to provide a chair that can be simplified and can be easily attached to an elastic support piece on a seat frame.

It is the perspective view which looked at one Embodiment of this invention from diagonally forward upper direction. Similarly, it is an exploded perspective view. Similarly, it is a top view of the part below the seat. It is the IV-IV line expansion longitudinal front view in FIG. It is the VV line expansion vertical side view in FIG. It is the perspective view which looked at the seat frame from diagonally lower back. FIG. 6 is an enlarged longitudinal sectional side view of the same part as the left part of FIG. 5 in a modified example of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the chair includes a leg 1, a seat 2, a backrest 3, and a pair of left and right armrests 4, 4.

The leg 1 connects a pair of left and right side legs 5 and 5 formed by bending a metal pipe into a substantially trapezoidal shape when viewed from the side, and opposing surfaces of the front upper ends of the left and right side legs 5 and 5. Between the left and right side legs 5, 5 that connect the rear upper ends of the left and right side legs 5, 5, and the sheet metal front connection rod 6 having a U-shaped cross section (see FIG. 5). It consists of a rear connecting rod 7 made of a metal pipe slightly longer than the left and right widths.
A plurality of projecting pieces 6 a projecting forward are provided on the front upper edge of the front connecting rod 6.

  Short bent portions 5b and 5b are continuously provided in the rear end portion of the upper horizontal rods 5a and 5a facing the front and rear direction at the upper portions of the left and right side legs 5 and 5 so as to face each other. By welding the rear surface of the part 5b to the lower front part of both side ends of the rear connecting rod 7, the left and right side legs 5, 5 are formed in a substantially trapezoidal shape when viewed from the side. The left and right upper horizontal rods 5a and 5a, the front coupling rod 6 and the rear coupling rod 7 form a substantially horizontal and closed-loop planar frame-shaped seat support frame 8 which supports the lower surface of the seat 2. Is formed.

The upper portions of the rear leg rods 5c and 5c facing the vertical direction in the left and right side legs 5 and 5 are connected to each other by a rear connection rod 7, and above the rear leg rods 5c and 5c protruding above the rear connection rod 7. A backrest 3 and left and right armrests 4, 4 are attached to the backrest support rods 9, 9 that are extensions of the backrest.
However, the mounting structure of the backrest 3 and the armrests 4 and 4 to the leg body 1 is not directly related to the present invention, and the detailed description thereof will be omitted.

  Fixing brackets 10 for fixing the lower surface of the seat 2 to the leg 1 are provided on the lower surfaces of the rear portions of the left and right upper horizontal rods 5a and 5a and the left and right bent portions 5b and 5b. It is fixed by welding so as to protrude inside.

  As shown in FIGS. 2 to 6, the seat 2 is integrally formed with the seat frame 11 so that the seat frame 11 is a closed-loop plan view rectangular frame shape and the peripheral portion is embedded in the upper portion of the seat frame 11. A tension member 12 made of a woven fabric, a mesh material, or the like, stretched on the upper surface of the seat frame 11, and a seat support frame 8 of the seat frame 11 or the leg 1, or supported between them, And an elastic support piece 13 that pushes up the tension member 12 when the tension member 12 is pushed down or pressed against the lower surface of the tension member 12 at all times.

  The seat frame 11 includes a front frame rod 11a and a rear frame rod 11b facing in the left-right direction, and a pair of left and right side frame rods 11c and 11c facing in the front-rear direction connecting the respective side ends.

  A short hanging edge 14 is provided on the outer peripheral edge of the seat frame 11, but at the outer corner of the joint between the rear frame collar 11 b and the both side frame collars 11 c and 11 c in the seat frame 11, A cutout portion 15 including a corner portion of the edge 14 is provided, and through the cutout portions 15 and 15, the backrest support rods 9 and 9 extend upward.

A hanging edge 16 thicker than the hanging edge 14 is provided on the inner peripheral edge of the rear frame collar 11b and the both side frame collars 11c, 11c in the seat frame 11.
The rear connecting rod 7 and the upper horizontal rod 5a in the leg body 1 are fitted from the lower side between the inner hanging edge 16 and the outer hanging edge 14 in the rear frame rod 11b and the both side frame rods 11c, 11c. By fixing each fixing bracket 10 to the lower surface of the hanging edge 16 with a set screw 17 (see FIG. 5) as a fastening means in a state where each fixing bracket 10 is in contact with the lower surface of the inner hanging edge 16, The seat 2 is firmly fixed to the leg 1.

  As shown in FIG. 5, the front frame collar 11 a in the seat frame 11 has a substantially inverted L-shaped cross-section in which a thick hanging edge 14 is continuously provided on the lower surface of the front end of the base 18, and the rear surface of the hanging edge 14. A plurality of concave portions 19 that are continuous with the lower surface of the base portion 18 and open toward the rear are provided in the upper portion at appropriate intervals in the left-right direction.

  On the inner side surfaces of the front portions of the both side frame rods 11c and 11c in the seat frame 11, a recess 20 that opens toward the inside of the seat frame 11 is provided in the same manner as the recess 19. At the lower edge of each concave portion 20 on the inner side surface of each side frame rod 11c, a protruding edge 21 that protrudes inward of the seat frame 11 is provided.

The elastic support piece 13 has a horizontally long dimension that is substantially the same as the distance between the side frame flanges 11c and 11c in the seat frame 11 and has a gradual plan view arc shape with a loose rear edge. A plurality of projecting pieces 22 facing forward are arranged on the front edge side by side in the left-right direction, and one projecting piece 23 facing outward is provided on both side edges.
The left-right width of each protrusion 22 is substantially the same as or slightly smaller than the left-right width of the corresponding recess 19, and the front-rear width of each protrusion 23 is substantially the same as the front-rear width of the corresponding recess 20, or It is a little small.

  The elastic support piece 13 is provided with a large number of holes 24 in an arrangement as shown in FIGS. 2 and 3 so as to obtain flexibility according to the load distribution when the seated person is seated. In other words, a plurality of holes 24 are arranged in a portion of the elastic support piece 13 where the left and right thighs of the stool are in contact with each other so as to form a plurality of concentric circles centering on the front end central portion.

  As shown in FIG. 5, the elastic support piece 13 has two protrusions 22 on the left and right sides of the front edge fitted in the corresponding recesses 19 in the front frame collar 11 a of the seat frame 11, or As shown in FIG. 4, the projecting pieces 23 and 23 on both side edges are in contact with the lower surfaces of the base frame 18 a of the front frame rod 11 a and the recesses 20 and 20 on the both side frame rods 11 c and 11 c of the seat frame 11. It is attached to the seat frame 11 so as to be fitted.

In the example shown in FIG. 5, the elastic support piece 13 is described as being always in contact with the lower surface of the tension material 12, but may be always separated from the lower surface of the tension material 12.
However, in any case, when the tension member 12 is pushed down, such as when the seated person is seated on the seat 2, the elastic support piece 13 is pressed against the lower surface of the tension member 12, and the tension member 12 is Push it up.

  In order to attach the seat frame 11 to the seat support frame 8 of the leg 1, the protrusions 6 a of the front connecting rod 6 are elastic with the elastic support piece 13 previously attached to the seat frame 11 as described above. The two protruding pieces 6 a on both the left and right sides of the front edge of the connecting rod 6 are fitted into the recesses 19 in the front frame flange 11 a of the corresponding seat frame 11. In this manner, the seat frame 11 is placed on the seat support frame 8 of the leg 1, and then each fixing bracket 10 is suspended from the lower side of the seat support frame 8 of the leg 1 on the inner side of the seat frame 11. Screw onto the lower surface of the edge 16.

  In addition, after mounting the seat frame 11 on the seat support frame 8 of the leg 1, the protrusions 22 of the elastic support piece 13 are connected to the protrusions 6 a of the front connection rod 6 and the front frame rod 11 a of the seat frame 11. The elastic support piece 13 is curved in a circular arc when viewed from the front side while being inserted between the lower surface of the base portion 18 and the projecting pieces 23, 23 on both sides are formed into the recesses 20, 20 on the side frame flanges 11c, 11c of the seat frame 11. The elastic support piece 13 can be attached to the seat frame 11 by fitting.

  When the seat frame 11 is attached to the seat support frame 8 of the leg 1 in this way, the elastic support piece 13 cannot move back and forth and left and right within the seat frame 11, and the elastic support piece 13 is seated with fastening means or the like. Even if the elastic support piece 13 is not fixed to the frame 11, it is possible to reliably prevent the elastic support piece 13 from being displaced in the left-right direction or rattling.

  Further, the elastic support piece 13 can compensate for the insufficient strength and tension of the tension member 12, and the elastic support piece 13 can be formed separately from the seat frame 11, so that the mold for forming the seat frame can be used. In addition to reducing the manufacturing cost, the structure of the seat frame 11 and the elastic support piece 13 can be simplified, and the elastic support piece 13 with the projecting pieces 22 and 23 can be simplified. Easy to install.

Furthermore, in this embodiment, the following effects can also be achieved.
(1) Since the lower edge of the concave portion 20 on the inner surface of the seat frame 11 is provided with a projecting edge 21 projecting inward of the seat frame, the projecting piece 23 is received and supported by the projecting edge 21 and elastically supported. It is possible to reliably prevent the piece 13 from dropping downward.

(2) The concave portion 19 provided on the rear surface of the front frame collar 11a in the seat frame 11 can perform both the attachment of the seat frame 11 to the leg 1 and the attachment of the elastic support piece 13 to the seat frame 11. it can.

(3) After engaging the recess 19 provided on the rear surface of the front frame collar 11a in the seat frame 11 with the projecting piece 22 provided on the upper front edge of the leg 1, the rear part of the seat frame 11 is The seat frame 11 can be easily attached to the leg body 1 by being brought into contact with the upper surface and fastened with the set screw 17.

The present invention is not limited only to the above-described embodiments, and can be implemented in various modified modes as follows, for example, without departing from the scope of the claims.
(1) As shown in FIG. 7, a notch 25 is provided in the lower part of the rear surface of the front frame collar 11a of the seat frame 11 so as to open to the rear and the lower side of the front frame collar 11a. By closing the upper surface of the front connecting rod 26 that functions in the same manner as the front connecting rod 6 in the leg 1, a recess 27 that opens to the inside of the seat frame 11 is formed, and the elastic support piece 13 is formed on this. The protruding piece 22 is fitted.
On the lower edge of the concave portion 27 on the rear surface of the front connecting rod 26, a protruding edge 26a similar to the protruding edge 21 protruding toward the inside of the seat frame 11 is provided.
With such a configuration, it becomes easy to remove the mold when the seat frame 11 is molded, and the structure of the molding die can be simplified, thereby contributing to a reduction in manufacturing cost.

(2) At the rear part of the seat frame 11, the elastic support piece 13 is attached with a structure symmetrical to the above. That is, the same thing as the said protrusion piece 22 is provided in the rear edge of the elastic support piece 13, and this is fitted to the thing similar to the recessed part 19 provided in the front surface of the rear frame collar 11b of the seat frame 11. FIG.

(3) The recesses 19 and 20 are provided on the rear surface of the front connecting rod 6 and the inner surface of the upper horizontal rod 5a in the leg 1, and the protruding pieces 22 and 23 of the elastic support piece 13 are fitted therein.
In that case, the same thing as the protruding edge 21 is provided in the lower edge of the recessed parts 19 and 20.

(4) The seat support frame 8 and the seat frame 11 are circular or other shapes in plan view.

(5) The protruding pieces 22 and 23 of the elastic support piece 13 are fixed to the lower surface of the seat frame 11 by screws or other fixing means.

(6) On the inner surface of the seat frame 11 or the support frame 8, a cylindrical portion that opens toward the inside of the seat frame 11 or the like is projected, and the elastic support piece 13 is provided in a recess formed at the tip of the cylindrical portion. Fit the protruding piece.

(7) The protruding piece of the elastic support piece 13 is attached to the side frame hook 11c of the seat frame 11, the upper horizontal hook 5a of the leg 1, or between them.

DESCRIPTION OF SYMBOLS 1 Leg body 2 Seat 3 Backrest 4 Armrest 5 Side leg 5a Upper horizontal collar 5b Bending part 5c Rear leg collar 6 Front coupling collar 6a Projection piece 7 Rear coupling collar 8 Seat support frame 9 Back support collar 10 Fixing bracket 11 Seat frame 11a Front frame rod 11b Rear frame rod 11c Side frame rod 12 Tension material 13 Elastic support piece 14 Hanging edge 15 Cut portion 16 Hanging edge 17 Set screw (fastening means)
18 Base 19 and 20 Recess 21 Projection edge 22 and 23 Projection piece 24 Hole 25 Cut 26 Front connection rod 26a Projection edge 27 Recess

Claims (4)

Legs and
A seat frame supported by the legs;
A tension member stretched on the seat frame;
By having a plurality of projecting pieces on the edge and supporting the projecting pieces between the seat frame or the legs, or between them, when projecting inward of the seat frame and the tension member is pushed down, An elastic support piece that presses against the lower surface of the tension member and pushes up the tension member ;
Further, a recess that opens rearward is provided on the rear surface of the front frame ridge facing the left-right direction in the seat frame, and a protruding piece that protrudes forward is provided on the upper front edge of the leg, and the protruding piece is By fitting the protrusion provided on the front edge of the elastic support piece into the gap above the protrusion in the recess, the front of the seat frame is fitted to the front upper part of the leg. A chair, characterized in that a part and an elastic support piece are attached . It is brought into contact with the rear portion of the seat frame to the upper surface of the leg, according to claim 1 chair according to the fastening by fastening means. Protruding pieces are provided on the front edge or rear edge of the elastic support piece and the left and right side edges, and by fitting each protrusion into the corresponding recess, the elastic support piece cannot be moved back and forth and left and right with respect to the seat frame. The chair according to claim 1 or 2 . The chair according to any one of claims 1 to 3 , wherein the size of the elastic support piece in the left-right direction is substantially the same as a distance between a pair of left and right side frame rods facing the front-rear direction in the seat frame.

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