JP2011244957A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair comfortable to sit on without necessitating high technical power or time and labor for manufacturing.SOLUTION: The chair has a structure wherein an elastically deformable support portion A32 projecting from the back side is integrally molded from a resin in a specified place of the peripheral edge part A5, i.e. in the rear edge A52 of the peripheral edge part A5 in this embodiment. The support portion A32 is provided in the rear edge A52 of the peripheral edge part A5 and forms a substantially U-shape being open in the front side and projecting from the back side, and a projecting portion A421 being the projecting portion thereof is attached to the rear frame A24 of a chair body A2.

Description

  The present invention relates to a chair suitably used for school or office use.

  Conventionally, since this type of chair is often seated for a relatively long time, the seating comfort has been emphasized and various improvements have been made. Recently, as a chair that is very comfortable to sit, a mesh-type chair has been developed in which a load of a seated person is elastically received by a mesh stretched on a frame member (see, for example, Patent Document 1). .

  However, in such a mesh-type chair, it is necessary to stretch the mesh on the frame member with an appropriate tension, the support structure is complicated, and a high technical force is required for the stretching operation.

JP 2007-202591 A

  The present invention has been made paying attention to the above-described circumstances, and an object thereof is to provide a comfortable chair without requiring high technical skill and labor for manufacturing.

  In order to achieve such an object, the present invention takes the following measures. In other words, the chair according to the present invention is a chair in which a seat body and a back plate are supported by a chair body, and at least one of the seat plate and the back plate is formed of a resin-supporting elastically deformable support portion. It is provided with the board | plate material integrally formed by this, The support part is attached to the chair main body, It is characterized by the above-mentioned.

  If this is the case, the load of the seated person is elastically received by the plate material, so it requires higher technical skills and labor than the conventional frame material with a mesh stretched. Instead, it becomes a comfortable chair. That is, the support portion mainly receives a seated person's load while being bent in the thickness direction, and is appropriately elastically deformed according to the load to give a required cushioning property, thereby providing a comfortable seat.

  As a specific aspect of the connecting portion that can be preferably elastically deformed, the support portion has a substantially U shape that opens to the front surface side and protrudes to the back surface side, and the protruding portion is attached to the chair body. You can list what you have.

  And in order to position a support part suitably in a chair main body, the said support part shall be provided with the processus | protrusion on the back surface of the protrusion part, and the hole provided in the frame of the chair body It is preferable to relate to the above.

  Moreover, as another aspect which can position a support part suitably also at cylindrical frames, such as a pipe, the said support part shall be provided with the protrusion which makes a cross-sectional C shape in the back surface of the protrusion part, An example in which the protrusion is externally fitted to the frame of the chair body can be mentioned.

  As yet another aspect of positioning the support portion, the support portion is provided with a through hole in the protruding portion, and the support portion is attached to the frame of the chair body by a fastening tool inserted through the through hole. Can be mentioned.

In order to be able to provide a suitable sitting comfort even when the seated person is leaning forward, the plate material constitutes a seat plate, and the support portion is located at a portion located on the front side of the seat plate. It is preferable to be provided.
And if a board | plate material shall be provided with the some support part, and the part located between the support parts shall be comprised so that elastic deformation could be carried out in the thickness direction, the whole board | plate material can be elastically deformed, and required The cushioning ability can be acquired.

  As a specific aspect to which the present invention is applied, if the chair body is provided with a frame in which an attachment plate is fixed, and the support portion is attached to the attachment plate, the entire plate material is the support portion. A suitable sitting comfort can be realized by changing the desired posture by elastic deformation.

  And in order to change the posture of the plate so that the sitting comfort can be further improved, it is desirable that the frame is annular and the mounting plate is provided on the inside.

  According to the present invention, since the load of the seated person is elastically received by the plate material, high technical power and labor are not required for manufacturing compared to a conventional frame material in which a mesh is stretched. In addition, a comfortable chair can be provided.

1 is an overall perspective view showing a first embodiment of the present invention. The whole perspective view which shows the back side of the embodiment. The top view of the embodiment. The side view of the embodiment. The whole perspective view showing a 2nd embodiment of the present invention. The whole perspective view which shows the back side of the embodiment. The figure which expands and shows the principal part in FIG. The sectional side view of the embodiment. The disassembled perspective view which shows the principal part of 3rd Embodiment of this invention. The side view which shows the chair of the embodiment typically. The whole perspective view showing a 4th embodiment of the present invention. The side view which shows the usage condition of the chair of the embodiment typically. The side view which shows the usage condition of the chair of the embodiment typically. The schematic diagram of the principal part which shows 4th Embodiment of this invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair A1 that can be stacked in the vertical direction. This chair A1 is formed by supporting a seat plate A3 and a back plate A4 on a chair body A2.

  As shown in FIGS. 1 and 2, the chair main body A2 includes left and right bases A21 placed on the floor, left and right front legs A22 extending upward from the front ends of the bases A21, and the rear of the bases A21. The left and right rear legs A23 extending upward from the ends, the left and right side frames A25 connecting the rear legs A23 and the upper ends of the left and right front legs A22, and the left and right side frames A25, A rear frame A24 functioning as a mounting plate, a front frame A26 erected between the vicinity of the front end of the side frame A25, and left and right back frames A27 extending upward from the upper end of the rear leg A23. . The base A21, the front leg A22, the rear leg A23, the side frame A25, the back frame A27, and the front frame A26 are integrally formed by bending a common metal wire, and the seat plate A3 and the back plate A4. It has the strength that can receive the load that acts on. Further, in the present embodiment, with the seat plate A3 attached to the chair body A2, a gap that allows the seat plate A3 to bend downward between the front frame A26 and the seat plate A3. Is set to be formed.

  As shown in FIGS. 1 to 4, the seat plate A3 includes a plate material A31, a support portion A32 according to the present invention protruding from the lower surface of the plate material A31, and a tip portion protruding downward from the front of the plate material A31. A seat fixing portion A33 (FIG. 4) fitted to the front frame A26, which is a wire rod, is provided. In this embodiment, the seat fixing portion A33 is integrally formed with a resin that can be bent in the thickness direction by elastic deformation.

  As shown in FIGS. 1 to 4, the plate material A31 has a peripheral portion A5 supported by the left and right side frames A25 of the chair main body A2, and an intermediate portion A6 located inside the peripheral portion A5. In this embodiment, which is integrally formed, a specific portion of the peripheral edge A5, in this embodiment, a rear edge portion A52 of the peripheral edge A5, an elastically deformable support portion A32 projecting to the back surface side, and The seat fixing portion A33 is integrally formed of resin. The support portion A32 and the seat fixing portion A33 protrude downward from the seat plate A31, so that a gap A34 is formed between the seat plate A31 and the side frame A25 as shown in FIG.

  As shown in FIGS. 1 to 4, the peripheral edge A5 includes a side edge portion A51 located on both left and right sides of the intermediate portion A6, a rear edge portion A52 located on the rear side of the intermediate portion A6, and the front side of the intermediate portion A6. And a front edge portion A53 located at the center. The side edge portion A51 is configured to be flush with the intermediate portion A6, but an appropriate shape such as a downward curve so as to wrap around the side frame A25 may be applied. The rear edge portion A52 is curved toward the rear upper side. The front edge portion A53 is curved toward the front lower side.

  As shown in FIGS. 1 to 4, the intermediate portion A6 is provided integrally with the peripheral edge portion A5 in this embodiment. Moreover, in this embodiment, the said intermediate part has comprised the same flat and flat form.

  As shown in FIGS. 1 to 4, the support portion A32 is provided at the rear edge portion A52 of the peripheral edge portion A5, and has a substantially U shape that opens to the front surface side and protrudes to the back surface side. The projecting portion A321 which is the bent portion is attached to the rear frame A24 of the chair body. A bolt insertion hole (not shown) is provided at the center of the projecting portion A321. A bolt A322 is inserted downward from the bolt insertion hole, and a nut A323 for retaining the bolt is attached to the tip of the bolt A322. The support A32 is fixed to the rear frame A24 by attaching a nut A323 to the tip of the protrusion A322 with the protrusion A322 inserted through the hole A241 provided in the rear frame A24. In addition, the lower surface of the protruding portion A321 is a curved surface A323 formed so as to bulge slightly downward. That is, while the support A32 and the rear frame A24 are suitably positioned by the protrusion A322 and the hole A241, the protruding portion A321 having a substantially U shape is appropriately bent by elastic deformation while being seated. . In the present embodiment, a gap A34 is formed between the side frame A25 and the seat plate A31. Thereby, even if it operates by elastic deformation of board material A31 and support part A32 by a seated person's seating, board material A31 does not interfere with side frame A25. In addition, even if the relative angle of the seat plate A3 itself with respect to the rear frame A24 changes due to the load of the seated person, since the curved surface A323 is in contact with the rear frame, the protruding portion A321 does not rattle.

  As shown in FIG. 1 and FIG. 2, the back plate A4 is, for example, a resinous material integrally provided with a plate material A41 that is the main body of the back plate and support portions A42 provided at four places on the upper, lower, left, and right sides. The back plate A4 is supported by the chair body A2 by fixing A42 to the back frame A27 at four positions. That is, in the present embodiment, the plate material A41 constituting the back plate A4 also has a structure in which the elastically deformable support portion A42 protruding rearward is integrally formed of resin.

  As shown in FIGS. 1 to 4, the plate member A41 includes an intermediate portion A43 supported by the back frame A27 of the chair main body A2 via the support portion A42, and a face plate portion A44 positioned at the periphery of the intermediate portion A43. In this embodiment, which is integrally molded with resin, the intermediate portion A43 has a structure in which elastically deformable support portions A42 that protrude from the top, bottom, left, and right total four locations to the back side are integrally molded with resin. There is no.

  The support portion A42 provided on the back plate A4 has a substantially U shape that opens to the front surface side and protrudes to the back surface side. In the case of this support portion A42, a rib A422 having a C-shape in plan view and an insertion pin A423 protruding rearward from the center of the rib A422 are provided at the rear side from the protruding portion A421 that is the protruding portion. Yes. Then, the rib A422 is fitted into the back frame A27 and the insertion pin A423 is inserted into an insertion hole provided in the back frame A27 (not shown) to be fitted into the back frame A27. As described above, the back plate A4 is attached to the back frame A27 of the chair main body A2 without shifting vertically and horizontally by fixing the support portion A42 to the back frame A27 at four positions in the middle portion A43. As a result, the projecting portion A421 having a substantially U shape is flexed by elastic deformation as appropriate due to the load applied to the back plate A4 by the bending motion of the seated person against the backrest.

  By setting it as the above structures, since chair A1 which concerns on this embodiment is equipped with board | plate material A31 and A41 which provided support part A32 and A42, it hangs on a seat board A3 and back board A4 of a seated person. Since the support portions A32 and A42 are elastically deformed when subjected to a load, it is required without requiring high technical force and labor for manufacturing as compared with a conventional frame material in which a mesh is stretched. It has become a cushion.

  Furthermore, in order to be able to be suitably elastically deformed, in the present embodiment, the support portions A32 and A42 are formed in a substantially U shape that opens to the front surface side and protrudes to the back surface side, and the protruding protrusion portions A321 and A421 are It is assumed that it is attached to the chair body A2.

  And about the support part A32 provided in the seat board A3, in order to position the support part A32 suitably to the rear frame A24 of the chair main body A2, the support part A32 is projected from the back surface of the protruding part A321. It is assumed that a bolt A322 is provided and protruded, and the protruded bolt A322 is inserted into a hole A241 provided in the rear frame A24 of the chair body A2, and a nut A324 is attached. Thus, the support portion A32 and the rear frame A24 are suitably engaged so as to ensure a smooth operation and not to come off unexpectedly.

  Further, since the peripheral edge portion A5 is curved as described above, the peripheral edge portion A5 has high rigidity necessary for the seat plate A3.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair B1 that can be nested in the front-rear direction. This chair B1 is formed by supporting a seat plate B3 and a back plate B4 on a chair body B2.

  As shown in FIGS. 5 to 8, the chair body B2 includes left and right front legs B21 having casters B211 at the lower ends, left and right rear legs B22 having casters B221 at the lower ends, the upper ends of the rear legs B22, The left and right side frames B24 that connect the upper ends of the front legs B21, the front frame B25 that is laid between the vicinity of the front ends of these side frames B24, and the rear frame B23 that is laid between the vicinity of the rear ends of these side frames B24 And left and right support frames B26 having a base end portion B28 rotatably supported by the rear frame B23, and left and right back frames B27 extending upward from the upper end of the rear leg B22. The front leg B21 and the side frame B24 are integrally formed by bending a common metal pipe material, and the rear end of the side frame B24 is rigidly connected to the upper end of the rear leg B22 by welding or the like. The front leg B21, the rear leg B22, the side frame B24, the front frame B25, the rear frame B23, the support frame B26, and the back frame B27 are strong enough to receive a load acting on the seat plate B3 and the back plate B4. I have. The seat plate B3 is supported on the front end portion and the rear end portion of the support frame B26, and the use position (U) where the seat plate B3 is substantially horizontal and the seat plate B3 are substantially parallel to the back plate B4. It can be rotated between a flip-up position (not shown). A concave portion B291 is formed in the intermediate portion B29 of the support frame B26, and the concave portion B291 is engaged with the front frame B25 at the use position (U). The distance between the left and right front legs B21 is set smaller than the distance between the left and right rear legs B22, and can be nested with other chairs having the same structure with the seat plate B3 flipped up. It has become.

  As shown in FIGS. 5 to 8, the seat plate B3 includes a plate member B31, front and rear attachment bodies B32 and B33 that protrude from the lower surface of the plate member B31 and are attached to the chair body B2, and a rear attachment body B33. In this embodiment, the front mounting body B31 and the support portion B35 are formed integrally with the plate material B31 with resin. Has been. The rear mounting body B33 is separate from the plate material B31 and the support part B35 in this embodiment, but may be provided integrally with the support part B35.

  As shown in FIGS. 5 to 8, the plate member B31 has a peripheral portion B5 supported by the left and right support frames B26 of the chair body B2, and an intermediate portion B6 positioned inside the peripheral portion B5. It is configured to be elastically deformable in the thickness direction formed integrally. In the present embodiment, the elastically deformable support portions B35 projecting toward the back surface are integrally formed with a resin at a specific location of the peripheral edge portion B5, and in this embodiment, at two locations on the rear edge portion B52 of the peripheral edge portion B5. The structure is made.

  As shown in FIGS. 5 to 8, the peripheral edge B5 includes side edge portions B51 located on the left and right sides of the intermediate portion B6, a rear edge portion B52 located on the rear side of the intermediate portion B6, and an intermediate portion B6. And a front edge portion B53 located on the front side.

  The intermediate portion B6 is a flat plate having the same structure as that of the first embodiment.

  As shown in FIGS. 6 to 8, the attachment bodies B32 and B33 are provided on the lower surfaces of the front edge portion B53 and the rear edge portion B52. The front attachment body B32 is provided at the front edge portion B53 of the peripheral edge portion B5, and the rear attachment body B33 is provided at the rear edge portion B52 of the peripheral edge portion B5. The front end of the support frame B26 is attached to the front attachment body B32 so as to be rotatable within a slight operating range in accordance with the elastic deformation of the plate material B31 and the support part B35, and the rear end of the support frame B26 is attached to the rear attachment body B33. The part is attached so that it cannot be detached. Between the front and rear mounting bodies B32 and B33, the support frame B26 and the intermediate portion B6 of the seat plate B3 are separated by a gap B34, and the gap B34 causes the intermediate portion B6 in the thickness direction. Elastic deformation is allowed. Further, the rear attachment body B33 is provided with a fixing portion B331 for fixing the support portion B35.

  As shown in FIGS. 5 to 8, the support portion B35 is provided at two left and right positions in the rear edge portion B52 of the peripheral edge portion B5, and has a substantially U shape that opens on the front surface side and protrudes on the back surface side. The protruding portion B351, which is the protruding portion, is attached to the rear frame B24 of the chair body. As described above, the rear mounting portion B33 is provided with the fixing portion B331 for fixing the center of the protruding portion B351, so that it is reliably positioned on the mounting portion B33. Thus, while the support part B35 and the rear frame B24 are suitably positioned, the protruding part B351 having a substantially U shape can be appropriately bent by the load of the seated person.

  As shown in FIGS. 5 to 8, the back plate B4 is provided with mounting holes B41 that open downward on both side edges, and the back plate B4 is fitted by fitting the mounting holes B41 to the back frame B27. Is supported by the chair body B2.

  With such a configuration, it can be used in the same manner as a conventional nestable chair, and the seat plate can provide an effect similar to that of the first embodiment described above.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair C1 capable of synchro-rocking, in which the back plate C4 and the seat plate C3 are tilted synchronously at a constant ratio. The chair C1 is formed by supporting a seat plate C3 and a back plate C4 on a chair body C2.

  As shown in FIGS. 9 and 10, the chair main body C2 includes a leg C21 having casters C211, a support base C22 supported by the upper end of the leg C21, and a back support that is tiltably supported by the support base C22. A collar C23, a seat support C24 disposed above the back support collar C23 and the support base C22, and a support mechanism C25 for supporting the seat support C24 on the support base C22 and the back support collar C23. . The seat receiver C24 includes an annular seat frame C26, mounting plates C27 fixed at the four corners of the seat frame C26, and a front connecting portion C28 and a rear connecting portion C29 for connecting to the support mechanism C25. Prepare. Specifically, the mounting plate C27 is provided inside the four corners of the seat frame C26. Then, the seat plate C3 is mounted on the seat frame C26, and the seat plate C3 is fixed to the seat frame C26 by a fastening tool such as a bolt C34 as shown in FIG. 9 inserted through the mounting plate C27. It is supported by. For example, as schematically shown in FIG. 9, the support mechanism C25 includes a front link element C251 having a free end structure that connects the front connection portion C28 of the seat frame C26 to the front end portion of the support base C22, and a back support rod. And a seat mounting portion C252 which is provided at an intermediate portion of C23 and rotatably supports the rear connection portion C29 of the seat frame C26.

  As shown in FIGS. 9 and 10, the seat plate C3 includes a resin plate material C31 that can be bent and deformed in the thickness direction, a support portion C32 that is attached to the attachment plate, and a bolt insertion hole provided in the support portion C32. The bolt insertion hole C33 and the bolt C34 inserted through the mounting plate C27 are screwed into a nut C35 (not shown).

  As shown in FIGS. 9 and 10, the plate member C31 has a peripheral part C5 supported by the seat frame C26 of the chair body C2 and an intermediate part C6 located inside the peripheral part C5, and is integrally made of resin. It is molded.

  As shown in FIGS. 9 and 10, the peripheral edge portion C5 includes a side edge portion C51 located on the left and right sides of the intermediate portion C6, a rear edge portion C52 located on the rear side of the intermediate portion C6, and an intermediate portion C6. And a front edge portion C53 located on the front side. The side edge portion C51 is curved downward so as to wrap around the seat frame C26. The rear edge portion C52 is curved rearward and upward. The front edge portion C53 is curved toward the front lower side.

  The intermediate part C6 has the same flat structure as that of the first embodiment.

  As shown in FIG. 10, the back plate C4 is attached to the upper end portion of the back support rod C23 so that the back plate C4 is supported by the chair body C2, and is integrated with the back support rod C23. It is designed to tilt.

  Thus, in the present embodiment, the support portions C32 are provided at four locations on the peripheral edge portion C5, in other words, at four locations corresponding to the mounting plate C27.

  The support portion C32 has a substantially U shape that opens to the front surface side and protrudes to the back surface side, and a protruding portion C321 that is the protruding portion is attached to the mounting plate C27. Specifically, a bolt insertion hole C33, which is a through hole, is provided in the center of the protruding portion C321, and the bolt C34 inserted through the bolt insertion hole C33 and the mounting plate C27 is screwed into the nut C35. It has become. The support portion C42 is provided at an angle of 45 °, for example, from the side edge portion C51, the rear edge portion C52, and the front edge portion C53 constituting the peripheral edge portion C5. Thus, when a load is applied to the seat plate C3, the load is applied in a direction in which the peripheral portion C5, that is, the side edge portion, the front edge portion, and the rear edge portion, which are configured to be difficult to deform by bending the resin, is pushed outward. The projecting portion C321 performs a bending operation while dispersing. Therefore, unnatural deformation of the seat plate C3 due to elastic deformation of the protruding portion C321 is effectively prevented. Thereby, the cushioning property of the seat plate C3 by the elastic deformation of the protruding portion C321 and the natural elastic deformation of the seat plate C3 itself at the time of sitting, that is, the elastic deformation of the seat plate C3 according to the shape of the seated person's buttocks. It is effectively balanced.

  With such a configuration, it can be used in the same manner as a conventional chair that can be synchro-clocked, and the seat plate C31 has the same effect as that of the first embodiment described above.

  And in this embodiment, in order to position the support part C32, the through-hole C33 is provided in the protrusion part C321, and it attaches to a flame | frame with the volt | bolt C34 which is the fixing tool penetrated by this through-hole C33, By this, the support part C32 The seat plate C31 is suitably positioned regardless of the synchro tilt operation of the seat plate C31 while ensuring the cushioning property.

  In the present embodiment, since the support portion C32 is also provided on the front side of the seat plate C31, it is possible to provide a suitable sitting comfort even when the seated person is tilted forward. That is, when the seated person puts a lot of weight on the front side of the seat plate C31, the front support portion C32 is deformed more and the entire seat plate C31 is in a forward tilt posture. Conversely, when the seated person puts a lot of weight on the rear side of the seat plate C31, the rear support portion is deformed more than C32, and the entire seat plate C31 is tilted backward. By combining such a configuration with the frame structure of the back seat synchro-rocking as in the embodiment, the seat plate C31 is moved forward as described above as the posture of the frame changes from the standing posture to the backward leaning posture. In combination with the tilting posture and the backward tilting posture, the seated person can take a wider sitting posture. Of course, such a structure in which the support portion C32 is provided on the front and back is applied to the chairs A1 and B1 having a fixed frame of the upper and lower stacks and the specification capable of nesting in the front and rear as in the first and second embodiments. Even in this case, the seated person can take a forward leaning posture as described here if he / she puts a lot of weight on the front side.

  In addition, in the present embodiment, a plurality of support portions C32 are provided on the plate material C31, and the plate material C31 itself is elastically deformed in the thickness direction, so that the portion located between the support portions C32 is also configured to be elastically deformable in the thickness direction. Therefore, not only the elastic deformation of the plate material C31 itself, but also the elastic deformation by the support portion C32, the entire seat plate C3 performs an elastic deformation operation suitable for the movement or change of posture of the seated person. As a result, the seat plate C3 has acquired the required cushioning properties.

  In particular, in this embodiment, as shown in FIG. 9, the front connecting part C28 and the rear connecting part C29 of the seat frame C24 connect the left and right sides of the seat frame C26 under the range where the intermediate part C6 of the seat plate C3 bends. Since it is not a structure, there is nothing that hinders downward deformation of the seat plate C3. Therefore, it is possible to set a large range in which the seat plate C3 can be deformed.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS.

  In this embodiment, the present invention is applied to a chair D1 that can be stacked in the vertical direction and can be nested in the front-rear direction. The chair D1 is formed by supporting a seat plate D3 and a back plate D4 on a chair body D2.

  As shown in FIG. 11, the chair body D2 includes left and right bases D21 placed on the floor via the grounding body D211, left and right front legs D22 extending upward from the front ends of the bases D21, The left and right rear legs D23 extending upward from the rear end of the base D21, the rear frame D24 installed between the upper ends of the rear legs D23, the vicinity of both ends of the rear frame D24, and the upper ends of the front legs D22 The left and right side frames D25 to be connected, the front frame D26 installed between the front end vicinity portions of the side frames D25, and the left and right back frames D27 extending upward from the upper end of the rear leg D23 are provided. The base D21, the front leg D22, the rear leg D23, the side frame D25, and the back frame D27 are integrally formed by bending a common metal wire, and act on the seat plate D3 and the back plate D4. It is strong enough to receive a load. The seat plate D3 is mounted on the left and right side frames D25 and the front frame D26, and is rotatably supported by the rear frame D24. As shown in FIGS. 11 and 12, the seat plate D3 is provided. As shown in FIG. 13, the seat plate D3 can rotate between a use position (U) that is substantially horizontal and a flip-up position (L) that is substantially parallel to the back plate D4.

  As in the first embodiment, the distance between the left and right bases D21 is set to be greater than the distance between the left and right side frames D25. As shown in FIG. The chair D1 can be stacked in the vertical direction. In particular, when stacking in the vertical direction as shown in FIG. 12, the lower surface of the installation body D211 of the upper chair D1 adjacent in the vertical direction is placed on the upper surface of the base D21 of the lower chair D1, It is set so that the seat plates D3 of the chair D1 do not directly contact each other. Therefore, when stacking in the vertical direction, the seat plate D3 of the upper chair D1 does not float up in the flip-up direction.

  The distance between the left and right front legs D21 is set to be smaller than the distance between the left and right rear legs D22. As shown in FIG. 13, the same structure is formed with the seat plate D3 flipped up. It can be nested with other chairs. That is, the separation distance between the left and right side frames D25 and the separation distance between the left and right bases D21 are set so as to gradually decrease toward the front.

  As shown in FIG. 11, the seat plate D3 includes a plate material D31 and a support portion D32 projecting from the lower surface of the plate material D31. In this embodiment, the seat plate D3 is integrally formed of resin.

  As shown in FIG. 11, the plate material D31 includes a peripheral part D5 supported by the left and right side frames D25, the front frame D26, and the rear frame D24 of the chair body D2, and an intermediate part D6 positioned inside the peripheral part D5. And is integrally formed of resin.

  As shown in FIG. 11, the peripheral edge portion D5 is positioned on the left and right sides of the intermediate portion D6, the rear edge portion D52 positioned on the rear side of the intermediate portion D6, and the front side of the intermediate portion D6. And a leading edge portion D53. The side edge portion D51 is curved downward so as to wrap around the side frame D25. The rear edge portion D52 is curved rearward and upward. The front edge portion D53 is curved toward the front lower side.

  As shown in FIGS. 11 and 14, the support portion D32 is integrally provided on the lower surface of the rear edge portion D52. The mounting body D32 has a groove D320 having a C-shaped cross section, and the groove D320 is pivotably engaged with the rear frame D25 to attach the seat plate D3 to the chair body D2. Yes.

  Specifically, as shown in FIG. 14, the support portion D32 has a substantially U-shape that opens to the front surface side and protrudes to the back surface side, and the protruding portion D321 that is the protruding portion is formed as a rear frame D24. It is attached to. Specifically, an outer fitting portion D322 that protrudes further downward is provided at the center of the protruding portion A321, and the outer fitting portion D322 is externally fitted to a cylindrical rear frame D24.

  As shown in FIG. 10, the back plate D4 is provided with mounting holes D41 that open downward on both side edges. By fitting the mounting holes D41 into the back frame D27, the back plate D4 is attached to the chair body. D2 is supported.

  With such a configuration, stacking in the vertical direction as shown in FIG. 11 and nesting in the front-rear direction as shown in FIG. 12 can be performed. The effect according to one embodiment is obtained. In addition, the configuration of the support portion D32 in the present embodiment allows the seat plate D3 to have a required shape by applying the shape of the support portion D32 according to the present invention to a cylindrical portion such as a metal wire or a pipe material. Cushioning can be given.

  Further, it is also conceivable to combine the structure according to the support portion D32 of the fourth embodiment described above with the position corresponding to the front frame A26 in the first embodiment and the chair body B2 of the second embodiment. It is done.

  The present invention is not limited to the embodiment described above.

  The plate member provided with the support portion according to the second embodiment and the third embodiment is not limited to the seat plate, and the back plate is configured like the back plate A4 shown in the first embodiment. You may do.

  Of course, the specific shape of the protruding portion is not limited to a substantially U-shape, and various modifications such as a wave shape in the thickness direction and a shape protruding in a C shape are possible. .

  In each of the above embodiments, the intermediate portion of the seat plate is a simple flat plate, but the upper surface of the plate material may be covered with a stretched fabric.

  In addition, the seat plate and the frame are not limited to those in which gaps or gaps are simply formed. Further, a separate cushion or the like is interposed between the frame and the plate material, or gaps or gaps are used. Or a special storage space.

  Further, the material of the plate material is not limited to the resin for molding the chair shell and the like, and an elastomer may be used.

  The front frame of the first embodiment has a gap between the lower surface of the intermediate portion and the upper surface of the front frame when the intermediate portion is bent in the thickness direction. The lower surface of the part may be in contact with the upper surface of the front frame to limit the downward bending range of the intermediate part.

  In the support frame of the second embodiment, when the intermediate portion is bent in the thickness direction, a gap is still interposed between the lower surface of the intermediate portion and the upper surface of the support frame. The lower surface of the part may be in contact with the upper surface of the support frame to limit the downward bending range of the intermediate part.

  The support mechanism of the third embodiment is such that the front end side of the seat frame is supported by the support base via the front link element, and the rear end side of the seat frame is pivotally supported by the seat mounting portion of the back support rod. However, the present invention is not limited to this, and any suitable one can be used as long as the back plate and the seat plate can be synchronized and tilted at a constant ratio.

  In addition, various changes may be made without departing from the spirit of the present invention.

  The present invention can be suitably used for school or office work.

A2, B2, C2 ... chair body A3, B3, C3, D3 ... seat plate A42 ... back plate A1, B1, C1 ... chair A32, A42, B35, C32, D32 ... support part A31, A41, B31, C31, D31 ... Plate material A321, B351, C321, D321 ... Projecting part (protruding part)

Claims (9)

A chair formed by supporting a seat plate and a back plate on a chair body, wherein at least one of the seat plate and the back plate is integrally formed of a resin and an elastically deformable support portion protruding to the back side. The chair is characterized in that the support portion is attached to the chair body. The chair according to claim 1, wherein the support portion has a substantially U shape that opens to the front surface side and protrudes to the back surface side, and the protruding portion is attached to the chair body. The chair according to claim 1 or 2, wherein the support portion includes a protrusion having a C-shaped cross section on the back surface of the protruding portion, and the protrusion is externally fitted to the frame of the chair body. The chair according to claim 3, wherein the support portion includes a protrusion on a back surface of the protruding portion, and the protrusion is engaged with a hole provided in a frame of the chair body. The chair according to claim 2, 3, or 4, wherein the support portion includes a through hole in the protruding portion, and the support portion is attached to the frame of the chair main body by a fastening tool inserted through the through hole. . The plate material constitutes the seat plate,
The chair according to claim 1, 2, 3, 4 or 5, wherein the support portion is provided at a portion located on the front side of the seat plate. The said board | plate material is provided with the some support part, and is comprised so that the site | part located between the support parts can be elastically deformed in the thickness direction. The listed chair. The chair according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the chair body includes a frame having a mounting plate fixed thereto, and the support portion is mounted on the mounting plate. The chair according to claim 8, wherein the frame is annular, and the mounting plate is provided inside thereof.

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