JP2012090786A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve or suppress the problem that a frame and a shaft supporting a seat plate are completely exposed and it is not preferable in terms of appearance.SOLUTION: A chair 1 includes a support frame 26 for supporting the seat plate 3, and the seat plate 3 is turned between a using position (U) and a spring-up position (J) through a shaft attaching part 262 of the support frame 26. On the back surface of the seat plate 3, a blindfold part 322 for surrounding the support frame 26 is provided.

Description

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

  2. Description of the Related Art Conventionally, as this type of chair, there is known a chair provided with a seat plate and capable of rotating the seat plate between a use position and a flip-up position (for example, see Patent Document 1).

  In such a case, there is one in which the seat plate is supported by a metal frame, but in the conventional one, the frame and the rotation shaft provided in this frame are completely exposed to the outside at the use position. Most of them were. For this reason, it is difficult to say that the appearance is good, and the periphery of the rotating shaft is exposed to the outside, which causes anxiety such as pinching a finger.

JP 2006-158746 A

  The present invention has been made paying attention to the above-described circumstances, and an object thereof is to eliminate or suppress the problem that the frame and the shaft supporting the seat plate are completely exposed and are not preferable in appearance.

  That is, the chair of the present invention has the following configuration.

  A chair according to claim 1 includes a support frame that supports a seat plate, and the seat plate can be rotated between a use position and a flip-up position via a shaft attachment portion of the support frame. And the blindfold which surrounds the said support frame is provided in the back surface of the said seat plate.

  According to a second aspect of the present invention, in the configuration according to the first aspect, the chair main body includes left and right side frames, and a front frame and a rear frame that couple the two side frames, and the rear frame is at least An extending portion extending upward is provided, and the shaft is supported by the mounting bracket.

  The chair according to claim 3 is the configuration according to claim 1 or 2, wherein the support frame is a frame-shaped support frame main body, and the pivoting portion provided at the rear end of the support frame main body, A horizontal frame erected in the middle in the front-rear direction of the support frame body, and the horizontal frame is supported by the front frame at the use position.

  According to a fourth aspect of the present invention, in the configuration according to the third aspect, the blindfold is a wall-shaped member provided on the seat plate so as to be in contact with the front surface and the left and right side surfaces of the support frame main body.

  The chair according to claim 5 is the structure according to claim 1, 2, 3 or 4, wherein the seat plate comprises a seat plate body having a plate shape, and a rear end portion of the seat plate body. The blindfold has a rear end portion corresponding to the warped portion, and has a vertical dimension larger than that of the front end portion.

  The chair according to claim 6 is the configuration according to claim 1, 2, 3, 4 or 5, and is stacked in the front-rear direction with another chair having the same structure with the seat plate held in the flip-up position. It is configured to obtain.

  According to the present invention, the frame and shaft that support the seat plate are completely exposed, and the problem of undesirable appearance is solved.

The perspective view of the chair which is one embodiment of the present invention. The front view in the embodiment. The left view in the embodiment. The rear view in the embodiment. The top view in the embodiment. The AA line partial expanded sectional view in FIG. The front view of the state which flipped up the seat board in the embodiment. The perspective view of the state which flipped up the seat board in the embodiment. Explanatory drawing which shows the rotation aspect of the seat board in the embodiment. The partial expanded sectional view which shows the attachment aspect of the backplate in the embodiment. The left view which shows the aspect of the nesting in the embodiment.

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

  In this embodiment, the present invention is applied to a chair 1 that can be stacked in the front-rear direction, in other words, a chair 1 that can be nested in the horizontal direction. That is, as specifically shown in FIG. 11, the chair 1 according to the present embodiment is another chair 1 ′ having the same structure by holding the seat plate 3 in the flip-up position (J) during storage. And it is comprised so that many chairs can be accommodated in a small space by making it adjoin in the front-back direction. In FIG. 11, the reference numerals of the other chairs are “1 ′”, but they have the same structure, so the other reference numerals are the same as those of the chair 1.

  The chair 1 includes a chair body 2 that supports a seat plate 3 and a back plate 4. More specifically, the chair 1 includes a chair body 2 having a support frame 26 that supports the seat plate 3. In addition, the seat plate 3 can be rotated between the use position (U) and the flip-up position (J) via the shaft 262 which is a shaft attachment portion of the support frame 26. The rotation operation of the seat plate 3 is basically performed by the user or the like moving up and down with the peripheral edge portion of the seat plate 3.

  Hereinafter, each structure of the chair 1 is explained in full detail.

  The chair body 2 is mainly composed of a metal pipe material. The chair body 2 includes left and right front legs 21 having casters 211 at the lower ends, left and right rear legs 22 having casters 221 at the lower ends, and left and right sides that connect the upper ends of the rear legs 22 and the upper ends of the front legs 21, respectively. A frame 24 and a front frame 25 which is constructed between the vicinity of the front ends of the left and right side frames 24 and couples the frames 24 on both sides, and a frame 24 which is constructed between the vicinity of the rear ends of the left and right side frames 24 are coupled to each other. The rear frame 23, the support frame 26 rotatably supported by the rear frame 23, and left and right back frames 27 extending upward from the upper end of the rear leg 22 are provided.

  The front leg 21 and the side frame 24 are integrally formed by bending a common metal pipe material, and the rear end of the side frame 24 is rigidly connected to the upper end of the rear leg 22 by welding or the like. Thus, the front leg 21, the rear leg 22, the side frame 24, the front frame 24, the rear frame 23, the support frame 26, and the back frame 27 can receive the load of the seated person acting on the seat plate 3 and the back plate 4. It has the strength possible. Then, the seat frame 3 is supported by the support frame 26 constituting the chair body 2, and for example, as shown in FIG. 9, the use position (U) and the seat plate where the seat plate 3 becomes substantially parallel to the floor surface. 3 can rotate between a flip-up position (J) that is substantially parallel to the back plate 4. 2, 4, and 7, the distance between the left and right front legs 21, that is, the width dimension is set to be smaller than the distance between the left and right rear legs 22, so that the seat plate 3 jumps. In the raised state, it can be nested with another chair 1 ′ having the same structure. That is, taking FIG. 11 as an example, first, the left and right rear legs 22 of the chair 1 are moved by moving the chair 1 and the other chair 1 ′ behind the chair 1 in a direction close to each other. By passing the left and right front legs 21 of the other chair 1 ′ inside and then moving further, the rear part of the front leg 21 in the chair 1 and the front part of the front leg 21 in the chair 1 ′ are positioned so as to face each other. Thus, nesting between the chair 1 and the other chair 1 'is enabled. Near the portion of the rear leg 22 where the left and right side frames 24 are joined, there is provided a contact portion 222 that can contact the outer portion of the side frame 24 of another chair 1 'during nesting.

  The front frame 25 is mainly composed of a straight metal pipe material that is laid between the front portions of the left and right side frames 24, and a horizontal member 263 of the support frame 26 described later is used. At the position (U), it comes into contact with the upper surface of the front frame 25. That is, the seat plate 3 is configured to be held at the use position (U) when the horizontal member 263 of the support frame 26 directly contacts the front frame 25.

  The rear frame 23 has a substantially straight rear frame main body 231 mainly composed of a metal pipe material laid between the left and right side frames 24, and an extending portion disposed in an intermediate portion of the rear frame main body 231. A barrel 232 (hereinafter referred to as “mounting bracket”) 232 is provided.

  The mounting bracket 232 that is an extending portion is disposed in the middle portion in the left-right direction of the rear frame main body 231, that is, the inner portion of the rear frame main body 231 than the joint portion with the side frames 24. The mounting bracket 232 has a pair of left and right, and extends upward from the upper surface portion of the rear frame body 231. More specifically, the mounting bracket 232 extends obliquely rearward and upward from the upper surface portion of the rear frame body 231. is there.

  A base end portion of the mounting bracket 232 is attached to the rear frame main body 231 by welding or the like. Thus, the mounting bracket 232 is cantilevered by the rear frame body 231. On the other hand, the front end of the mounting bracket 232 is provided with a bearing portion 232a for rotatably supporting the shaft 262 of the support frame 26, and the shaft 262 is rotatably mounted between the left and right mounting brackets 232. . The bearing portion 232a is configured mainly with a shaft hole. In other words, in the chair 1 according to this embodiment, the mounting bracket 232 of the rear frame 23 rotatably supports the shaft 262 of the support frame 26, and thereby the seat plate 3 supported by the support frame 26. It is assumed that it can rotate between the use position (U) and the flip-up position (J).

  The bearing portion 232 a of the mounting bracket 232 is configured to support both end portions of the shaft 262 of the support frame 26. In the side view, the mounting bracket 232 is formed with a recessed portion 232b having a concave shape toward the front at the rear middle portion in the vertical direction. In other words, the mounting bracket 232 has a substantially square shape in the side view. It has a shape. Thus, when the seat plate 3 is in the flip-up position (J), the edge portion of the blindfold 322 disposed on the lower surface of the rear portion of the seat plate 3 described later is positioned in the vicinity of the recessed portion 232b. Yes. That is, by forming the recessed portion 232b in the mounting bracket 232, as shown in FIGS. 8 and 9, when the seat plate 3 is in the flip-up position (J), the mounting bracket 232 and the seat plate 3 are blinded. The part 322 is prevented from interfering, and the seat plate 3 can be positioned at the flip-up position (J) without difficulty.

  More specifically, it is as follows. That is, the shaft 262 supported at the upper end portion of the mounting bracket 232 extending rearward and upward is a position on the lower surface of the seat plate main body 31 and on the inner side of the rear end edge of the seat plate main body 31, that is, on the front side. Therefore, the rear end portion of the seat plate 3 is positioned below the shaft 262 by rotating the seat plate 3 to the flip-up position (J). At this time, when the seat plate 3 protrudes downward from the seat plate main body 31 and is in the use position (U), the blind portion 322 covering the side portion of the shaft 262 to be described later in detail. The rear portion 322c (see FIG. 4) is positioned at the lower portion of the shaft 262 when the seat plate 3 is rotated to the flip-up position (J). For this reason, the mounting bracket 322 extends rearward and upward, has a bearing portion 232a at the upper end portion thereof, and further includes a recessed portion 232b at the middle portion in the vertical direction at the rear portion of the mounting bracket 232. In this configuration, even if the blindfold 322 protrudes downward from the seat plate body 31, the blindfold 322 does not hinder the rotation, and as a result, the entire seat plate 3 can be freely rotated. It can be moved.

  Next, the support frame 26 that supports the seat plate 3 will be described.

  The support frame 26 includes a frame-shaped support frame main body 261, a shaft 262 provided at the rear end portion of the support frame main body 261, and a horizontal member 263 provided at an intermediate portion in the front-rear direction of the support frame main body 261. It is equipped with.

  The support frame main body 261 has a frame shape similar to the outer edge shape of a baseball home base in a bottom view. Specifically, the support frame main body 261 includes a front support frame 261a disposed on the front lower surface of the seat plate 3, and A side support frame 261b which is continuous from both ends of the front support frame 261a and is arranged on the lower surfaces of the left and right side portions of the seat plate 3, and a seat plate which is continuous from the respective rear end portions of the side support frames 261b on both sides. 3 and a rear support frame 261c disposed on the rear lower surface. The upper surfaces of the front support frame 261a and the side support frame 261b are in direct contact with the seat plate 3. Further, a bracket b for attaching the seat plate 3 projects from the inner side surface of the side support frame 261b. The rear support frame 261c is a pair of left and right, and an inclined portion 261d formed so that the distance between the pair of frames constituting the rear support frame 261c gradually decreases toward the rear, and these inclined portions 261d. And a rear end frame portion 261e that is continuously formed and extends in the left-right direction. The rear end surface of the rear end frame portion 261e is connected to the intermediate portion in the left-right direction of the shaft 262 extending in a substantially straight line in the left-right direction.

  The shaft 262 is mainly composed of a metal pipe material. The left and right ends of the shaft 262 are supported rotatably on the mounting bracket 232 of the rear frame 23 via a bearing portion 232a. Thus, the seat plate 3 supported by the support frame body 261 of the support frame 26 can be rotated between the use position (U) and the flip-up position (J) via the shaft 262 of the support frame 26. It has become. In the present embodiment, the longitudinal dimension of the shaft 262 is set to be shorter than the longitudinal dimension of the rear frame main body 231.

  The straight portion of the front support frame 261a is substantially parallel to the front end edge of the seat plate 3, and the straight portion of the side support frame 261b is substantially parallel to the left and right side edges of the seat plate 3. ing. In addition, the linear portion of the rear end frame portion 261e of the rear support frame 261c is formed so as to be substantially parallel to the linear portion of the front support frame 261a.

  In the present embodiment, the front support frame 261a, the side support frame 261b, and the rear support frame 261c are formed by bending a common metal pipe material at a predetermined location, in other words, the support frame. Each support frame 261a, 261b, 261c constituting the main body 261 is formed continuously through a bent portion.

  Both end portions of the metal pipe material forming the support frame main body 261, in other words, open edges of the rear support frame 261c, that is, the small end surfaces of the left and right rear end frame portions 261e of the rear support frame 261c are fixed to each other. They are positioned to face each other with a gap. Thus, the rear surface portion of the rear end frame portion 261e and the front surface portion of the shaft 262 arranged substantially parallel to the rear end frame portion 261e are attached by welding. With such a configuration, the support frame main body 261 and a part of the shaft 262 attached to the support frame main body 261 form a continuous loop portion, which is excellent in strength. In other words, since the support frame 26 has a frame structure in which a closed loop is formed, the strength is excellent.

  The horizontal member 263 is configured to be supported by the front frame 25 in the use position (U). In the use position (U), the horizontal member 263 has a shape in which a central portion protrudes downward in a front view. In other words, the horizontal member 263 includes a raised portion that protrudes downward in the front view at the use position (U). More specifically, the horizontal member 263 includes a horizontal member main body 263a having a raised portion r mainly composed of a metal pipe material, and an abutting member attached to an intermediate portion in the horizontal direction of the horizontal member main body 263a. 263b is provided. The horizontal member main body 263a has a shape in which a middle portion in the left-right direction bulges downward in a front view, and a screw that a resin contact member 263b is a fastening member on the bulged portion of the horizontal member main body 263a. It is attached by. The contact member 263b contacts the front frame 25 at the use position (U), and the lower surface on which the contact surface is formed is the shape of the front frame 25 as shown in detail in the sectional view of FIG. In other words, the shape is a concave shape corresponding to the shape of the pipe frame of the front frame 25.

  In other words, the chair main body 2 described in detail above includes a support frame 26 that can rotate together with the seat plate 3 and a base portion B that includes components other than the support frame 26. That is, the base part B is mainly composed of a metal pipe material, and includes left and right front legs 21 having casters 211 at the lower ends, left and right rear legs 22 having casters 221 at the lower ends, and these rear legs. The left and right side frames 24 that connect the upper end of the front leg 22 and the upper end of the front leg 21, the front frame 25 that spans between the front end vicinity of the left and right side frames 24, and connects the both side frames 24, and the left and right side frames 24 A rear frame 23 is provided between adjacent rear end portions and joins both side frames 24, and left and right back frames 27 extending upward from the upper ends of the rear legs 22. Thus, the chair 1 according to the present embodiment is configured so that the support frame 26 having the seat plate 3 and the shaft 262 is used with respect to the base portion B via the shaft 262 (U) and the flip-up position (J). It can be rotated between.

  Next, the seat plate 3 will be described in detail.

  The seat plate 3 includes a plate-shaped seat plate main body 31 and a support frame engaging portion 32 that is provided on the back surface, that is, the lower surface of the seat plate main body 31 and engages with the support frame 26. The seat plate 3 is integrally formed of resin.

  The seat plate main body 31 includes a plurality of through holes 311 in an intermediate region. As shown in FIG. 5, the through holes 311 are arranged in a straight line at the front edge portion of the seat plate body 31, and are arranged to draw an arc at the rear edge portion, and the middle portion is at the front side. The arcs are arranged so that the curvature gradually increases from the rear toward the rear. The front support frame 261a constituting the support frame 26 is disposed between the front first row of through holes 311 and the front second row of through holes 311 that are arranged substantially linearly. As can be seen from FIG. 5, the front support frame 261a is not visually recognized through the through hole 311 when the seat plate 3 is viewed from above, thereby improving the design.

  The size of the through hole 311 is set so as to gradually increase from the front edge portion of the seat plate body 31 toward the rear edge portion. As shown in FIG. 6, each through-hole 311 includes a cylindrical portion 311a provided in the upper half and a conical portion 311b provided in the lower half and expanding downward. A ridge line visible from the upper surface portion of the seat plate 3 is formed at a boundary portion with the conical portion 311b.

  The seat plate main body 31 has a shape in which the front end portion hangs downward and the rear end portion warps upward. That is, the seat plate main body 31 includes a hanging portion 312 that hangs downward at the front end portion, and a warped portion 313 that warps upward at the rear end portion. In the present embodiment, the shaft 262 of the support frame 26 is positioned below the warped portion 313. A standing wall portion (not shown) is provided around the end portion of the shaft 262 in the seat plate main body 31, that is, in the vicinity of the outside of the mounting bracket 232 of the rear frame 23, so that fingers and the like are prevented from approaching the shaft 262. Yes.

  For example, when the rear support frame 261c is pressed in the vertical direction to form a flat shape or the longitudinal section is formed in an elliptical shape, and the seat plate 3 is in the use position (U), the rear support frame 261c And the front part of the mounting bracket 232 extending rearward upward, a large gap is formed between the rear support frame 261c and the mounting bracket 232, and the user's fingers Etc. can be suitably suppressed.

  The peripheral portion of the seat plate 3, that is, the peripheral portion of the seat plate main body 31 is configured to be separated from the base portion B of the chair main body 2. More specifically, the chair 1 according to the present embodiment is configured such that, in the use position (U), the entire peripheral edge portion of the seat plate body 31 and the base portion B are spaced apart at a predetermined interval. The user's fingers and clothes are not easily pinched on the lower surface side of the seat plate 3. The side frame 24 extending in the front-rear direction and the side edge of the seat plate 3 and the side frame 24 and the support frame main body 261 are configured to be separated in the vertical direction.

  The support frame engaging portion 32 is located on the outer surface side of the support frame main body 261 and the shaft 262, and surrounds the support frame 26. A blindfolded part 322 and an attaching part 323 which is provided on the lower surface of the seat plate main body 31 and is screwed via a bracket b provided on the support frame 26 are provided.

  The support frame receiving portion 321 is a plurality of ribs extending in a direction orthogonal to the longitudinal direction of the support frame main body 261, and a plurality of ribs are provided at predetermined intervals corresponding to the upper surface of the support frame main body 261 in the seat plate main body 31. It is arranged. Specifically, a plurality of support frame receiving portions 321 are arranged at a predetermined interval corresponding to the upper surfaces of the front support frame 261a and the side support frame 261b of the support frame main body 261.

  The blindfold 322 protrudes downward from the seat plate main body 31, and in the present embodiment, surrounds the outer surface side of the support frame main body 261 and the shaft 262 in a side view, and has a continuous wall shape. Here, “enclose” means to surround the periphery. For example, as shown in this embodiment, the support frame main body 261 and the shaft 262 cover substantially half in the thickness direction from the outside in a side view, If it covers at least the gap between the lower surface of the seat plate main body 31 and the support frame main body 261 and the shaft 262, it corresponds to “enclose”.

  The blindfolded part 322 is located on the front side of the support frame body 261 and covers the support frame body 261; the side part 322b that is located on the left and right outside of the support frame body 261 and covers the support frame 261; It is located on the rear side of the support frame main body 261 and on the left and right outer sides and the rear side of the shaft 262, and includes a rear portion 322 c that covers the support frame 261 and the shaft 262. A part of the blindfolded part 322, specifically, the front part 322a and the side part 322b of the blindfolded part 322 are provided so as to be attached to the front surface and the left and right side surfaces of the support frame main body 261. When the plate 3 is attached, a part of the inner side surface of the blindfolded part 322 is attached to the outer surface of the front support frame 261a and the outer surface of the side support frame 261b so as to exhibit a positioning function.

  The blindfolded part 322 is set so that the vertical dimension on the rear side of the blindfolded part 322 is larger than the vertical dimension on the front side of the blindfolded part 322 in correspondence with the seat plate main body 31 having the warped part 313. In other words, the vertical dimension of the rear part 322c in the blindfolded part 322 formed on the seat plate 3 is set larger than the vertical dimension of the front part 322a and the side part 322b in the blindfolded part 322. More specifically, the rear portion 322c of the blindfolded portion 322 is formed to correspond to the seat plate main body 31 having the warped-up portion 313 so as to gradually increase in the vertical direction as viewed from the side. . The front portion 322a, the side portion 322b, and the rear portion 322c of the blindfolded portion 322 disposed on the seat plate body 31 have height dimensions so that their lower end portions can be visually recognized continuously in a horizontal manner in a side view. It is changing. Thus, the seat plate 3 forms a space K in which the shaft 232 can be accommodated by the lower region of the seat plate main body 31 and the inner region of the blindfolded part 322. More specifically, the seat plate 3 accommodates substantially the entire shaft 232 and the bearing portion 232a of the mounting bracket 232 by the lower region of the warped portion 313 of the seat plate main body 31 and the inner region of the rear portion 322c of the blindfolded portion 322. An enclosed space K that can be used. In addition, the lower end edge of the blind part 322 protruding downward from the seat plate body 31 is formed substantially horizontally in a side view.

  The attachment portion 323 is provided on the lower surface of the seat plate main body 31. The mounting portion 323 includes a plate nut accommodation chamber (not shown) in which a plate nut can be arranged, and a support frame for the plate nut (not shown) arranged in the plate nut accommodation chamber. Screws n that have passed through screw insertion holes of the bracket b formed in the main body 261 are screwed together, and the support frame 26 and the seat plate 3 are attached to each other.

  The back plate 4 includes a back plate main body 41 and attachment portions 42 that are integrally provided on both left and right sides of the back plate main body 41, and the attachment portion 42 is more than the lower edge of the back plate main body 41. It is extended downward. Then, the back plate 4 is supported by the chair body 2 by fitting a mounting hole 421 formed in the mounting portion 42 and opening downward to the back frame 27. The back frame 27 is inserted and fixed in the mounting hole 421 until the upper end of the back frame 27 reaches substantially the same height as the lower edge 411 in the center of the back plate main body 41. Further, as shown in FIG. 5, the back plate main body 41 has a curved shape so that the central portion bulges back in plan view.

  The chair 1 according to the present embodiment is configured such that the seat plate 3 is supported by a support frame 26 that is rotatably supported by a shaft 262. As described above, the support frame 26 is a support frame in the chair body 2. The base part B which is a part excluding the reference numeral 26 is rotatably supported. When the seat plate 3 is in the use position (U), the support frame 26 is supported by only two intermediate portions of the rear frame 23 constituting the base portion B and only one intermediate portion of the front frame. I have to. For this reason, the chair 1 shown in the present embodiment has the outer edge portion of the seat plate 3 extending outward from the outer edge portion of the support frame 26 and the entire area between the outer edge portion of the seat plate 3 and the base portion B. In FIG. 3, the user's fingers and clothes can be suitably prevented from being pinched between the support frame 26 and the base portion B.

  As described above, the chair 1 according to the present embodiment includes the support frame 26 that supports the seat plate 3, and the seat plate 3 is used at the use position (U) via the shaft 262 that is a shaft attachment portion of the support frame 26. And the flip-up position (J), and the blind plate 322 surrounding the support frame 26 is provided on the back surface, that is, the bottom surface of the seat plate 3. The frame and the shaft supporting 3 are completely exposed, and the problem that it is not preferable in appearance is solved or suppressed. In addition, the presence of the blindfolded part 322 suppresses anxiety such as pinching fingers for the user and gives the user a sense of security.

  The chair body 2 includes left and right side frames 24, and a front frame 25 and a rear frame 23 that connect the both side frames 24, and includes a mounting bracket 232 that extends upward. Since the mounting bracket 232 supports the shaft 262, a configuration in which the shaft 262 is surrounded and hidden by the blindfold 322 can be easily realized.

  The support frame 26 includes a frame-shaped support frame main body 261, a shaft 262 provided at the rear end of the support frame main body 261, and a horizontal member 263 installed in the middle of the support frame main body 261 in the front-rear direction. Since the horizontal member 263 is supported by the front frame 25 in the use position (U), the load of the seated person is appropriately supported.

  Since the blindfolded portion 322 is a wall-like member provided on the seat plate body 31 so as to be in contact with the front surface and the left and right side surfaces of the support frame body 261, the support frame 26 and the seat plate 3 can be easily attached during assembly. Can be positioned.

  The seat plate 3 is provided with a plate-shaped seat plate main body 31, which has a warped portion 313 at the rear end portion of the seat plate main body 31, and the blindfold portion 322 warps the rear end portion thereof. Since the vertical dimension is set to be larger than that of the front end portion, the lower surface of the rear end portion of the seat plate body 31 and the rear end portion of the blindfold portion 322 are concealed larger than the front side portion of the seat plate 3. A space K can be formed.

  When the seat board 3 is configured to be nestable in the front-rear direction with another chair S1 having the same structure while being held in the flip-up position (J), and thus when the plurality of chairs 1 are not used. Can be cleaned up efficiently.

  The support frame 26 includes a horizontal member 263 having a raised portion r that protrudes downward in the left-right intermediate portion, and the raised portion r of the horizontal member 263 is supported by the intermediate portion in the left-right direction of the front frame 25. Therefore, the support frame main body 261 and the side frame 24 are separated from each other in the vertical direction, and the user's fingers, clothes, and the like are preferably prevented from being pinched.

  The chair body 2 includes a pair of left and right side frames 24 and a rear frame 23 that couples the both side frames 24. The rear frame 23 is provided with a mounting bracket 232 that is an extension extending upward. Since the shaft 262 is supported by the bracket 232, the position of the shaft 262 can be provided at a position away from the rear frame main body 231, and the seat plate 3 can be rotated with respect to the base portion B. It is possible to provide a chair that is excellent in the degree of freedom of design in terms of support.

  The mounting brackets 232 constituting the rear frame 23 form a pair extending rearward and upward. Since the shaft 262 is rotatably mounted between the mounting brackets 232, the shaft 262 can be securely held and blindfolded. The rear portion of the seat plate 3 formed by projecting the portion 322 downward is supported without difficulty.

  A mounting bracket 232 constituting the rear frame 23 is provided at an intermediate portion of the rear frame main body 231, and the shaft 262 is shorter than the longitudinal dimension of the rear frame main body 231. Both end portions are located on the inner side of the edge of the seat plate 3, and it is preferable to prevent fingers and clothes from being sandwiched around the shaft 262 as the seat plate 3 rotates.

  Since the blind portion 322 surrounding the shaft 262 is provided on the back surface of the seat plate body 31, the shaft 262 becomes difficult to see from the outside, and the appearance is excellent, and as the seat plate 3 rotates, the shaft It is preferable to prevent fingers and clothes from being sandwiched around 262.

  The seat plate main body 31 has a warped part 313 at the rear end, and the blindfolded part 322 has a rear end corresponding to the warped part 313 and has a vertical dimension larger than that of the front end. Since the shaft 262 is positioned below the warped-up portion 322, the shaft 262 positioned below the warped-up portion 322 can be configured to be difficult to see from the outside by the blindfolded portion 322.

  Since the seat plate main body 31 is supported by the support frame main body 261, the plate-shaped seat plate main body 31 is backed up by the support frame main body 261, and the thickness of the seat plate main body 31 is small, that is, the seat plate main body 31 is thinned. Can be. In addition, since the seat plate main body 31 can be made thin, a certain elastic deformation is allowed in the seat plate main body 31 molded from resin, and when the seated person sits, the seat plate main body 31 has a certain cushioning property. .

  Since the seat plate 3 forms a space K in which the shaft 232 can be accommodated by the lower region of the seat plate main body 31 and the inner region of the blindfolded portion 322, the shaft 232 can be hardly exposed to the outside, and the shaft By accommodating 232 in the space K, it is possible to suitably prevent the user from pinching fingers or clothes around the shaft 232.

  Since the seat plate body 31 is provided with the hanging portion 312 at the front portion and the warped portion 313 is provided at the rear portion, the hanging portion 312 suitably corresponds to the thigh and the knee back of the seated person, and the raised portion 313 is the seated person. It is possible to provide a suitable sitting comfort corresponding to the buttocks.

  The seat plate main body 31 is provided with a plurality of through holes 311 in an intermediate region, and the through holes 311 are arranged linearly at the front edge portion of the seat plate main body 31 and at the rear edge portion. Since it is arranged so as to draw an arc and the middle part is arranged so as to draw an arc with a gradually increasing curvature from the front to the back, the seat plate 3 having excellent design can be obtained. it can.

  The front support frame 261a of the support frame main body 261 that supports the seat plate 3 is formed between the through holes 311 in the first front row and the through holes 311 in the second front row that are arranged substantially linearly in the seat plate main body 31. Since the front support frame 261a is not visually recognized through the through hole 311 when the seat plate 3 is viewed from above, the appearance is excellent.

  The size of the through hole 311 formed in the resin seat plate 3 is set so as to gradually increase from the front edge portion of the seat plate main body 31 toward the rear edge portion. Cushioning properties can be imparted.

  Each through-hole 311 provided in the seat plate 3 includes a cylindrical portion 311a provided in the upper half and a conical portion 311b provided in the lower half and expanding downward, and the cylindrical portion 311a Since a ridge line visible from the upper surface portion of the seat plate 3 is formed at the boundary portion with the conical portion 311b, when the user or the like views the seat plate 3 from the upper surface side, the cylindrical portion of the through hole 311 Only 311a is visually recognized, and the seat plate body 31 of the seat plate 3 has a structure that looks thinner than it actually is. For this reason, a smart impression can be given to the user.

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

  The blindfold may surround the entire vertical direction of the support frame in a side view. On the other hand, the blindfolded part does not have to completely hide the support frame in a side view, and is surrounded by a portion where the fingers and the like cannot be accessed from the outside in the vicinity of the joint part between the support frame and the seat plate. That's fine.

  In the present embodiment, the blindfolded portion is a wall-shaped portion, but is not limited to this. For example, a plurality of protrusions formed on the seat plate may be arranged around the support frame to be a blindfold. That is, by surrounding the plurality of protrusions with the support frame, even if the support frame can be seen between the plurality of protrusions, it corresponds to the structure of the blindfold.

  The bearing portion is not limited to the shaft, and may be a member having a bearing function. That is, as shown in this embodiment, in addition to the support frame having a shaft, the support frame may have a bearing. In this case, it is desirable that the shaft is provided not on the support frame side but on the rear frame side. More specifically, a construction in which a shaft is installed between a pair of mounting brackets extending upward from the rear frame main body is conceivable. In other words, the shaft may be provided on the base portion. For example, the shaft is provided on the base portion, and a bearing for holding the shaft of the base portion on the support frame that supports the seat is provided. The seat may be provided so that the seat can be rotated between the use position and the flip-up position via the shaft of the base portion.

  The rear frame in this embodiment includes a mounting bracket, but may not include a mounting bracket. For example, if the shape of the rear frame is convex upward, a bearing or a shaft can be arranged on the convex portion.

  The extending portion is not limited to the bracket as shown in the present embodiment. For example, a pipe-shaped frame may be used, or a frame structure may be used. In other words, the extending portion may be anything as long as it is for providing the shaft at a position spaced from the rear frame.

  The extending portions are not limited to those forming a pair, and may be a single one or a plurality of three or more.

  The location where the extension portion is provided is not limited to that provided in the middle portion in the left-right direction of the rear frame as shown in the present embodiment. However, as shown in the present embodiment, the extension portion constituted by the pair of brackets is arranged in the middle portion in the left-right direction of the rear frame, and the longitudinal dimension of the shaft is shorter than the longitudinal dimension of the rear frame. If it is a dimension, the structure which does not expose a shaft to the side edge of a seat board and the vicinity of a side edge can be implement | achieved.

  The seat plate is not limited to the one shown in this embodiment. For example, various things, such as the thing which provided the cushion in the seat board and the thing which does not provide the through-hole in the seat board, can be considered.

  In the present embodiment, both end portions of the shaft are supported by the extending portions that make a pair, but portions other than both end portions of the shaft may be supported by the extending portions.

  As shown in this embodiment, the shaft is not limited to the one installed between the left and right mounting brackets. The shaft is individually inserted into each of the left and right brackets, and the support frame is rotatably supported. You may make it make it. That is, the seat plate can be rotated via a plurality of shafts.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Chair 3 ... Seat plate 26 ... Support frame 262 ... Axis attachment part (axis)
322 ... Blindfold (U) ... Use position (J) ... Bounce-up position

Claims (6)

A chair comprising a support frame for supporting a seat plate, wherein the seat plate can be rotated between a use position and a flip-up position via a shaft attachment portion of the support frame. A chair characterized in that a blindfold surrounding the support frame is provided on the back surface. The chair body includes left and right side frames, and a front frame and a rear frame that join these two side frames,
The chair according to claim 1, wherein the rear frame includes at least an extending portion that extends upward, and the shaft is supported by the extending portion. The support frame includes a support frame main body having a frame shape, the shaft mounting portion provided at a rear end portion of the support frame main body, and a horizontal member erected in the middle in the front-rear direction of the support frame main body. The chair according to claim 1 or 2, wherein the horizontal member is supported by the front frame in the use position. The chair according to claim 3, wherein the blindfold is a wall-like member provided on the seat plate so as to be in contact with the front surface and the left and right side surfaces of the support frame main body. The seat plate is provided with a plate-like seat plate body,
The rear end portion of the seat plate body has a warped portion, and the blindfold portion has a rear end portion corresponding to the warped portion, and the vertical dimension is set larger than the front end portion. A chair according to 2, 3 or 4. The chair according to claim 1, 2, 3, 4, or 5, configured to be stackable in the front-rear direction with another chair having the same structure in a state where the seat plate is held in the flip-up position.

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