JP5855879B2 - Chair - Google Patents

Description

  The present invention relates to a chair having a backrest portion that receives a seating load by tension of a bag-like upholstery covering the surface.

  Chairs installed in theaters, planetariums, movie theaters, stadiums, etc. are usually arranged with a plurality of legs side by side. For this reason, if the seated person in the rear seat shifts his feet or rearranges his legs, his knees and toes may hit the back of the backrest of the front seat, and the impact will cause the seated person in the front seat to feel uncomfortable Sometimes. In particular, in the case of using a backrest portion that is reclined deeply, such as a planetarium chair described in Patent Document 1, there is a problem that kicking from the rear seat to the front seat is likely to occur.

  In theaters and planetariums, it is desirable to reduce the thickness of the backrest in the front-rear direction as much as possible in order to increase the installation efficiency of chairs relative to the floor area and accommodate many spectators. Cushioning that can sit comfortably for a long time is also required.

  In other words, this type of chair is provided with a backrest that can improve cushioning and impact resistance from the rear seats while suppressing the thickness in the front-rear direction and improving the placement efficiency of the chair in the theater. desirable.

Japanese Utility Model Publication No. 3-25635

  The present invention has been made in consideration of the above-described problems of the prior art, and provides a chair that can improve the efficiency of arrangement of the chair, and can also improve cushioning and impact resistance from the rear seat. With the goal.

The chair according to the present invention is a chair whose surface is covered with a bag-like tension material, has a backrest portion that receives the load of a seated person by the tension of the tension material, and is arranged side by side, The backrest extends vertically, and a pair of left and right side frames connected to each other by an upper frame having at least an upper portion extending in the left-right direction, and the tension member is stretched together with the pair of side frames. It is located between the pair of side frames as viewed and located behind the pair of side frames as viewed from the side , and the width in the left-right direction is set smaller than the interval between the pair of side frames . and a protective member, JP bridged the rear side of the upholstery material between the left and right portions of the protective member and the respective side frame, that you function as a cushion to receive the load from the rear To. In this case, the upholstery material is stretched so as to accommodate and cover the pair of side frames and the protective member, and the front surface stretched between the pair of side frames is seated. In addition to functioning as a cushion for receiving a person's load, a structure may be provided in which a gap is provided between the front surface and the protective member.

  According to such a configuration, the backrest portion that receives the load of the seated person by the tension of the bag-like upholstery material is provided, and the upholstery material is stretched over the side frame and the protective member behind this. The bending of the upholstery material can be used as the cushion material without separately providing a cushion material or the like. In addition, since the protective member is located between the pair of side frames and located behind the side frames, the back of the seated person in the front seat directly from the rear seat side due to the protective effect of the protective member itself. It is prevented from being kicked up. Further, since the protective member is arranged on the back surface side of the backrest portion, the tensioning distance of the tension material to the frame becomes narrow, so that the amount of bending on the rear surface side of the tension material can be reduced, and the The impact can be received by the upholstery material, and the discomfort of the seated person can be further reduced. In addition, by reducing the distance between the frames in the horizontal direction by the protective member and reducing the amount of bending of the upholstery material, the back and forth thickness of the backrest can be suppressed while ensuring sufficient cushioning. The arrangement efficiency can be improved.

  The backrest portion has a lower frame that extends in the left-right direction and connects the lower portions of the pair of side frames, and when the upper frame and the lower frame are connected to each other by the protection member, The installation of the members is easy and the rigidity of the entire frame constituting the backrest portion can be enhanced by the protective member, and the backrest portion is made thinner and the tension material is applied with sufficient tension. Can do.

  When the protective member is a flat plate-like member that is flat in the front-rear direction, the plate-like member can receive an impact from the rear.

  The protective member has a pair of left and right support frames that connect the upper frame and the lower frame. When the plate member is provided between the pair of support frames, the plate member is a thin metal plate or the like. Even if it is formed by, it can be installed with sufficient strength.

  The protective member may be a plurality of pipe members that connect the upper frame and the lower frame. In this case as well, the amount of bending of the upholstery on the back side of the backrest can be reduced, so the impact on the seated person can be reduced smoothly with the minimum amount of bending of the upholstery, and the uncomfortable feeling of the seated person can be reduced. Can be reduced.

  The upholstery member may have a transmission part that can be visually recognized from the outside at least in part, and a display part that displays predetermined information may be provided at a position corresponding to the transmission part of the protection member. If it does so, a display part can be easily confirmed from the front and back of a chair, and a larger display part can be easily installed by providing a display part in a protection member. Moreover, when the protective member provided with the display part extends to the upper part of the backrest part, the display part can be easily arranged on the upper part of the backrest part, and the display part is hidden by the raised seat part. You can avoid that.

  According to the present invention, since the protective member is provided between the pair of side frames and positioned behind the side frames, the back of the seated person in the front seat is directly provided by the protective effect of the protective member itself. It is prevented from being kicked up from the rear seat side. Further, since the protective member is arranged on the back surface side of the backrest portion, the tensioning distance of the tension material to the frame becomes narrow, so that the amount of bending on the rear surface side of the tension material can be reduced, and the The impact can be received by the upholstery material, and the discomfort of the seated person can be further reduced. In addition, by reducing the distance between the frames in the horizontal direction by the protective member and reducing the amount of flexure of the upholstery material, the back and forth thickness of the backrest can be suppressed while ensuring sufficient cushioning, so the chair in the theater The arrangement efficiency can be improved.

FIG. 1 is a side view of a chair according to an embodiment of the present invention. FIG. 2 is a side view of the chair shown in FIG. 1 in a reclining state. FIG. 3 is a front view of the chair shown in FIG. FIG. 4 is a perspective view from the front side of the backrest. FIG. 5 is a perspective view from the back side of the backrest. FIG. 6 is a three-sided view of the backrest, FIG. 6 (A) shows a plan view of the backrest, FIG. 6 (B) shows a front view of the backrest, and FIG. 6 (C). These show the side view of a backrest part. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view showing a first modification of the protective member. FIG. 9 is a cross-sectional view showing a second modification of the protective member. FIG. 10 is a cross-sectional view showing a third modification of the protective member.

  Hereinafter, preferred embodiments of a chair according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a side view of a chair 10 according to an embodiment of the present invention, and FIG. 2 is a side view of the chair 10 in a reclining state. 1 and 2 illustrate predetermined front seats 10F and rear seats 10R out of many chairs 10 arranged in the front-rear direction. FIG. 3 is a front view of the chair 10 and shows a state in which the chair 10 is installed side by side as a set of three legs in the left-right direction.

  As shown in FIGS. 1 and 2, the chair 10 (the front seat 10F and the rear seat 10R) is a seat portion 14 for a user to sit on, and a back on which a seated person on the seat portion 14 leans against his back. A drooping portion 16 and an armrest portion 20 for a seated person to put his elbow on are provided.

  Hereinafter, in the present embodiment, as the chair 10, as shown in FIG. 3, a three-legged chair 10 aligned in the left-right direction is integrally fixed on the floor surface by a pair of leg portions 22, and in this left-right direction, An example of a planetarium chair in which a set of three legs is arranged in a plurality of rows side by side in a step-up manner in the front-rear direction as shown in FIGS. 1 and 2 will be described. As long as two or more legs are arranged in the front-rear direction, the chair 10 may be arranged in the front-rear direction in a flat shape or a slope that rises backward, and one leg is used alone in the left-right direction. Or two or more legs may be used side by side. Of course, the chair 10 can also be used for purposes other than the planetarium.

  As shown in FIG. 1, the seat portion 14 is configured to be able to be flipped up with its base end (rear end) side as a pivot, and when it is not seated, the seat portion 14 jumps upward to pass between the front seat 10F and the rear seat 10R. As a space can be secured. The state in which the seat 14 is flipped up is indicated by a two-dot chain line in FIG. Of course, the seat 14 may be a fixed type. The armrest portion 20 is installed on each outer side portion of the chair 10 and one that is shared by both seats is installed in an intermediate portion between the chairs 10 adjacent to the left and right (see FIG. 3).

  FIG. 4 is a perspective view from the front side of the backrest portion 16 and is an exploded perspective view in a state before the bag-like tension member 24 is put on the backrest portion 16. FIG. 5 is a perspective view of the backrest 16 from the rear side. 6 is a three-sided view of the backrest part 16, FIG. 6 (A) shows a plan view of the backrest part 16, FIG. 6 (B) shows a front view of the backrest part 16, and FIG. (C) shows a side view of the backrest 16.

  As shown in FIGS. 1 to 6, the backrest portion 16 has a frame-like back frame (frame frame) 26 that is a skeleton and the surface thereof is covered with a bag-like upholstery material (upholstery) 24. The load from the seated person can be received by the tension of the upholstery material 24. Further, a headrest frame 28 on which an occupant can turn his / her head is provided integrally with the back frame 26 at an upper portion of the back frame 26. Since the chair 10 according to the present embodiment is a planetarium chair, a headrest is formed on the upper portion of the backrest portion 16 by a headrest frame 28, but the headrest (headrest frame 28) is omitted depending on the use of the chair 10. May be.

  As shown in FIGS. 4 and 5, the back frame 26 includes a pair of left and right side frames 30, 30 extending in the up-down direction, and an upper frame 32 extending in the left-right direction and connecting the upper portions of the side frames 30. And a lower frame 34 that extends in the left-right direction and connects the lower portions of the side frames 30 to each other, and is formed in a rectangular frame shape when viewed from the front shown in FIG.

  The upper frame 32 and the lower frame 34 are curved backward from the left and right sides toward the center so as to wrap around the back of the seated person, and the side frame 30 is downward from the connecting portion with the upper frame 32. Toward, after being recessed at one end rearward, it has a curved shape bulging forward.

  The headrest frame 28 includes a pair of left and right extension frames 36 and 36 that are curved so that the upper end of each side frame 30 extends upward and the middle part is positioned forward of the upper and lower parts in a side view. A top frame 38 that extends and connects the upper ends of the extension frames 36 is formed, and is formed in a rectangular frame shape that is flat in the height direction in a front view shown in FIG.

  The side frame 30, the extension frame 36, and the top frame 38 are integrally formed by forming both ends of a long pipe member (pipe frame) into an arch shape (gate shape) by bending. A mounting portion 40 for fixing the backrest portion 16 to a frame (not shown) on which the seat portion 14 of the chair 10 is provided is provided on the lower front surface side of each side frame 30.

  Each frame constituting the back frame 26 and the headrest frame 28 is formed by a metal pipe member with sufficient rigidity and strength, and the degree to which a seated person leans on the backrest 16 with his back. It is a structure that does not bend substantially under the load of the load, that is, a structure that does not bend at the seating load level or slightly bends.

  As shown in FIG. 4, a protection member 42 is installed at the center of the back frame 26 so as to extend in the vertical direction. The protection member 42 is positioned between the pair of side frames 30 and 30 in a front view shown in FIGS. 3 and 6B, and each side frame 30 in a side view shown in FIGS. 1 and 6C. It functions as a protector which receives the impact from back with the upholstery material 24 which is located in the back and is stretched on the outer surface.

  As shown in FIGS. 4 to 6, the protection member 42 is provided between a pair of left and right support frames 44, 44 that extend in the vertical direction and connect the upper frame 32 and the lower frame 34. Plate member (plate member) 46 to be formed.

  The support frame 44 is a pipe member (pipe frame) having a smaller diameter than the side frame 30 and the like constituting the back frame 26, and is substantially the same as the side frame 30 in a side view as understood from FIG. It is molded into a curved shape. Each support frame 44 is disposed at a position where the upholstery material 24 stretched on the rear side between the side frames 30 is divided into approximately three equal parts (see FIG. 7).

  The plate member 46 is a plate-like member (sheet metal) that is fixed between the support frames 44 and flat in the front-rear direction, and the center in the left-right direction substantially coincides with the center in the left-right direction of the backrest 16 ( (See FIG. 7). As understood from FIG. 1 and the like, the plate member 46 is formed in a curved shape substantially the same as that of the side frame 30 and the support frame 44 in a side view.

  The support frame 44 and the plate member 46 constituting the protective member 42 are formed with sufficient rigidity and strength by a metal pipe member and a metal plate-like member, respectively, and each frame constituting the back frame 26 is formed. As in the case of the above, the structure is such that the seat 16 does not bend substantially under a load such that the seated person leans against the backrest 16 with his back. Further, both side portions below the support frame 44 and above the lower frame 34 are connected to the lower portion of the side frame 30 by plate-like connection frames 47 and 47 (FIGS. 4 and 5). See), and a higher rigidity is imparted.

  As shown in FIGS. 3, 4 and 6, the upholstery material 24 is formed by integrally forming a headrest cover portion 48 covering the headrest frame 28 and a back cover portion 50 covering the back frame 26 into a bag shape. is there. In the case of this embodiment, a leather material is used for the headrest cover portion 48, and a permeable mesh material is used for the back cover portion 50. For simplicity of the drawings, the headrest cover portion 48 and the back cover portion 50 are illustrated in the same pattern in the drawings other than FIG. Of course, the material of the upholstery material 24 can be appropriately changed according to the use of the chair 10 or the like. However, if at least the back cover 50 is made of a mesh material, the ventilation of the backrest 16 can be secured. Like a planetarium chair, it is ideal for applications where you sit down for a long time with the reclining deep. Moreover, the large display part 52 can also be provided by using a mesh material for the back cover part 50 so that it may mention later.

  As shown in FIG. 4, the upholstery material 24 is formed in a bag shape with an opening at the lower end, and the bag-like upholstery material 24 is covered from the upper portion of the headrest frame 28 through the opening at the lower end. Thus, the entire headrest frame 28 and back frame 26 are covered with the upholstery material 24. At this time, as understood from FIGS. 6 and 7, the bag of the upholstery material 24 is formed slightly smaller than the skeleton of the backrest portion 16 including the headrest frame 28 and the back frame 26. In addition, by covering the back frame 26 while pulling the tension member 24, the tension member is stretched with sufficient tension. The lower end opening of the upholstery material 24 may be fixed to the lower frame 34 or the like by a coupling means such as a fastener or a hook.

  More specifically, as shown in FIG. 7, the back cover portion 50 covering the back frame 26 is composed of two side frames 30 and 30, two support frames 44 and 44, and a plate member 46. The backrest 16 is stretched with sufficient tension in the front / rear and left / right directions. Thereby, even when the load of the seated person is applied to the front surface 50a of the back cover portion 50, the front surface 50a is sufficiently bent by a distance of about L1 as shown by a two-dot chain line in FIG. Exhibits cushioning and provides a comfortable sitting comfort.

  That is, the side frame 30, the support frame 44, and the plate member 46 have a structure that does not bend substantially under the load that the seated person leans against the backrest 16 as described above. The front surface 50a of the upholstery material 24 (the back cover portion 50) against which the seated person hits is stretched between the two side frames 30 and 30 having a sufficient interval. The amount (distance L1) can be ensured, and a comfortable cushioning property can be exhibited. At this time, since the upholstery material 24 (back cover portion 50) is stretched around the side frame 30 and the protection member 42, the front surface 50a against which the seated person hits is located between the side frames 30 with a wide interval. The distance L1, which is the amount of deflection of the front surface 50a, is limited to some extent by the protective member 42 provided on the rear surface side, so that the front surface 50a is excessively bent, It can be avoided that the protective member 42 bottoms out.

  On the other hand, the rear surface side of the upholstery material 24 (back cover portion 50) on which the seated person's foot of the rear seat 10R may hit is protected by the protection member 42 at the center and formed on the side portion of the protection member 42. Since the rear side surface 50b is stretched between the side frame 30 and the protective member 42 (support frame 44) having a narrow interval, the amount of deflection is approximately a distance L2 that is sufficiently smaller than the distance L1. (Refer to the chain double-dashed line in Fig. 7). Even if force is applied from the rear, the impact is not transmitted directly to the seated person, and the impact from the rear to the seated person is reduced, causing discomfort. Can be reduced. In other words, by disposing the protective member 42 on the back surface side of the backrest portion 16, the distance between the frames in the lateral direction on which the tension member 24 is stretched can be narrowed, and the amount of deflection of the tension member 24 is reduced. Therefore, without increasing the thickness of the backrest portion 16 in the front-rear direction, the upholstery material 24 can be stretched with sufficient tension, and the thickness of the backrest portion 16 can be further reduced.

  As shown in FIG. 3, a display unit (seat number plate) 52 that displays the seat number and the like of the chair 10 is provided on the front surface of the plate member 46 constituting the protection member 42. The display portion 52 is provided at a position corresponding to the transmission portion 54 formed of a mesh material on the front surface of the back cover portion 50 constituting the upholstery material 24 and is visible from at least the front surface of the chair 10. Of course, the display unit 52 and the transmission unit 54 may be provided on the rear surface of the backrest unit 16 or may be provided on both the front surface and the rear surface. The display unit 52 displays predetermined information other than the seat number. It may be used to display.

  As described above, according to the chair 10 according to the present embodiment, the surface is covered with the bag-like upholstery material 24, and the backrest portion 16 that receives the load of the seated person by the tension of the upholstery material 24 is provided. In the chair 10 arranged side by side, the backrest portion 16 extends in the vertical direction, and a pair of left and right side frames 30, 30 connected to each other by an upper frame 32 having at least an upper portion extending in the left-right direction, and a pair of The upholstery material 24 is stretched together with the side frames 30 and 30, and is positioned between the pair of side frames 30 and 30 in the front view shown in FIGS. 3 and 6B. ) And a pair of side frames 30, 30 in the side view shown in FIG.

  That is, the chair 10 has a backrest portion 16 that receives the load of the seated person by the tension of the bag-like upholstery material 24, and the upholstery material 24 is stretched over the side frame 30 and the protection member 42 behind this. As a result, it can be used as a flexible cushioning material for the upholstery material 24 without separately providing a cushioning material or the like (see distance L1 in FIG. 7).

  Further, the chair 10 includes a protective member 42 that is located between the pair of side frames 30 and 30 and is located behind the side frame 30. For this reason, even when the seated person of the rear seat 10R changes the position of the foot, even if the foot of the seated person kicks up the rear surface of the backrest portion 16 of the front seat 10F, first, the protective member 42 It is prevented that the back of the seated person in the front seat 10F is directly kicked up by the protective effect by itself. Secondly, on the rear surface side of the backrest 16, the distance over which the tension member 24 is applied to the frame is narrowed by the protection member 42, so that the amount of bending of the rear side surface 50 b of the tension member 24 (back cover portion 50) is reduced. (Refer to the distance L2 in FIG. 7), the impact on the seated person can be further reduced, and discomfort can be reduced. Further, by reducing the amount of bending of the upholstery material 24 by the protective member 42, the thickness of the backrest portion 16 in the front-rear direction 16 is suppressed while ensuring sufficient cushioning properties, and the placement efficiency of the chair 10 in a theater such as a planetarium is improved. Can be improved.

  As shown in FIGS. 1 and 2, the backrest 16 of the chair 10 can be reclined, so that the legs of the seated person in the rear seat 10F can more easily hit the rear surface of the front seat 10F. 10, by providing the protection member 42, the reclining is deeply tilted as shown in FIG. 2 due to the effect of thinning the backrest portion 16 and the effect of improving the impact resistance by the protection member 42 as described above. Even in the state, the discomfort of the seated person can be reduced.

  As shown in FIGS. 4 and 5, when the protection member 42 is installed extending in the vertical direction so as to connect the upper frame 32 and the lower frame 34, the protection member 42 is easily installed, The rigidity of the entire back frame 26 can be increased by the protective member 42, and the tension member 24 can be stretched with sufficient tension while the backrest portion 16 is thinned.

  Further, by providing the plate member 46 between the pair of support frames 44, 44 as the protection member 42, the rigidity of the protection member 42 is increased, and the plate member 46 can kick a foot from the seated person in the rear seat 10R. It can be received directly and sufficiently, and the discomfort of the seated person in the front seat 10F can be further reduced.

  In the chair 10, the upholstery material 24 has a transmission part 54 made of, for example, a mesh material on at least a part of the backrest part 16, and predetermined information (for example, a position corresponding to the transmission part 54 on the front surface of the protection member 42). , A seat number) is provided. Thereby, the display part 52 can be easily confirmed from the front or back of the chair 10, and the larger display part 52 can be easily installed by providing the display part 52 on the plate member 46. Moreover, as can be understood from FIG. 3, the protective member 42 provided with the display portion 52 extends to the upper portion of the backrest portion 16, so that the display portion 52 can be disposed on the upper portion of the backrest portion 16. It is not hidden by the raised seat 14.

  In the above-described embodiment, the protection member 42 including the support frame 44 and the plate member 46 is illustrated, but the configuration of the protection member may of course be another configuration.

  For example, as shown in FIG. 8, even if the pair of support frames 44, 44 are omitted and the protection member 42a is provided with only the plate member 46, the discomfort of the seated person when the force is applied from the rear is provided. Can be reduced. In this case, in order to ensure the thinness and high rigidity of the plate member 46, curl molding, flange molding, or the like may be performed on both side edges of the plate member 46. 8 is a plan sectional view of the backrest 16 when the protection member 42a is applied to the backrest 16, similar to the cross-sectional view shown in FIG. 7, and the protection member 42a is similar to the protection member 42. The upper frame 32 and the lower frame 34 are connected to each other, and the same applies to the protective members 42b and 42c shown in FIGS. 9 and 10 below.

  On the other hand, as shown in FIG. 9, the plate member 46 may be omitted, and the protective member 42 b having only a pair of support frames 44, 44 may be configured. In this case, the amount of bending of the rear surface 50c of the upholstery material 24 (back cover portion 50) stretched between the pair of support frames 44, 44 is about the same distance L2 as the amount of bending of the rear side surface 50b (see FIG. 9) (see rear side surface 50b and rear surface 50c indicated by a two-dot chain line in FIG. 9), the impact on the seated person can be sufficiently reduced, and discomfort can be reduced.

  As shown in FIG. 10, the protection member 42b may be configured as a protection member 42c in which the number of support frames 44 is three or more (in FIG. 10, three configurations are illustrated). The support frames 44, 44, 44 may divide the side frames 30, 30 into approximately four equal parts. Then, the amount of bending of the four rear side surfaces 50d of the back cover portion 50 constituting the upholstery material 24 can be reduced to a distance L3 smaller than the distance L2, respectively (see the rear side surface 50d indicated by a two-dot chain line in FIG. 10). The impact on the seated person can be further reduced, and the discomfort can be further reduced.

  When the display unit 52 is installed without using the plate member 46 as in the protective members 42b and 42c, for example, the plate-like display unit 52 is provided between two or three support frames 44 in the center. Install it.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

  For example, in the above embodiment, the bag-like tension material covering the surface of the backrest portion is exemplified by the tension material 24 that is formed in a bag shape by providing an opening only at the lower end (see FIG. 4). As a bag-like covering material that covers the upper part and the lower end, after covering the backrest with a cylindrical covering material provided with openings at the upper and lower ends, one sheet The backrest portion is wrapped from the side by the upholstery material, the side portion of the upholstery material is closed to form a cylinder, and then the upper and lower openings are closed, and further, a single sheet-like upholstery material After the backrest is wrapped from above, various configurations such as a configuration in which both sides of the upholstery material are closed to form a bag and then the lower opening is closed can be mentioned. Any tension material that can cover the surface of the part in a bag shape can be used. Here, the bag shape may cover at least the front, back, left and right of the backrest, as well as the one that covers the top, bottom, front, back, left and right of the backrest, depending on the use of the chair. It can also be set as the structure which does not cover both upper and lower sides or one side.

DESCRIPTION OF SYMBOLS 10 Chair 14 Seat part 16 Backrest part 24 Tension material 26 Back frame 28 Headrest frame 30 Side frame 32 Upper frame 34 Lower frame 36 Extension frame 38 Top frame 42 Protection member 44 Support frame 46 Plate member 48 Headrest cover part 50 Back cover Part 52 Display part 54 Transmission part

Claims (6)

The surface is covered with a bag-like upholstery material, has a backrest portion that receives the load of the seated person by the tension of the upholstery material, and is a chair arranged side by side,
The backrest extends in the vertical direction, and a pair of left and right side frames connected to each other by an upper frame in which at least the upper part extends in the left-right direction;
The upholstery material is stretched together with the pair of side frames, is positioned between the pair of side frames in a front view and is located rearward of the pair of side frames in a side view, and has a lateral width. A protective member set smaller than the distance between the pair of side frames ;
Equipped with a,
The chair posterior side of the tension member which is bridged between the left and right portions of the protective member and each side frame, characterized that you function as a cushion to receive the load from the rear. The chair according to claim 1, wherein
The tension member is stretched so as to accommodate and cover the pair of side frames and the protection member, and a front surface stretched between the pair of side frames is a load of a seated person. functions as a cushion receiving the chair characterized that you have gap is provided between the protective member and the front surface. The chair according to claim 1 or 2,
The said protection member is a plate-shaped member flat in the front-back direction, The chair characterized by the above-mentioned. The chair according to claim 3,
The backrest has a lower frame that extends in the left-right direction and connects the lower portions of the pair of side frames, and the upper frame and the lower frame are connected to each other by the protective member,
The protective member has a pair of left and right support frames that connect the upper frame and the lower frame;
The plate member is provided between the pair of support frames. The chair according to claim 1 or 2,
The backrest has a lower frame that extends in the left-right direction and connects the lower portions of the pair of side frames, and the upper frame and the lower frame are connected to each other by the protective member,
The chair, wherein the protection member is a plurality of pipe members that connect the upper frame and the lower frame. In the chair according to any one of claims 1 to 5,
The upholstery has a transmission part that can be seen from the outside to the inside at least in part,
A chair provided with a display section for displaying predetermined information at a position corresponding to the transmission section of the protection member.

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