JP2018068970A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair which provides a comfort sitting feeling.SOLUTION: A chair comprises: an L-shaped member 6 which can be elastically deformed with corner parts 60A, 60A as a center; a plate-shaped member 11 which is rotatably attached to one sides 60a, 60c, 61 of the L-shaped member 6 sandwiching the corner parts A, 60A; and a seat member 7 stretched between the plate-shaped member 11 and the other sides 60b, 62, 64 of the L-shaped member 6. One sides 60a, 60c, 61 of the L-shaped member 6 can be used as a seat 22, and the other sides 60b, 62, 64 of the L-shaped member 6 can be used as a backrest 21.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a chair having a seat and a backrest.

  As a chair having a seat and a backrest used at home or the like, a chair as shown in Patent Document 1 is known. This chair is mainly composed of a seat and a backrest extending upward from the rear end of the seat, and the seat frame that is the main part of the seat and the backrest frame that is the main part of the backrest are rotatable. It is connected to. In addition, a ratchet mechanism is disposed at the connecting portion between the seat frame and the backrest frame, and the setting of the inclination angle of the backrest frame relative to the seat frame can be appropriately changed stepwise by the ratchet mechanism. .

Japanese Patent Laying-Open No. 2015-208473 (page 6, FIG. 2)

  However, the chair as in Patent Document 1 has a configuration in which the inclination angle of the backrest frame is fixed with respect to the seat frame by the ratchet mechanism after changing the setting of the inclination angle of the backrest frame with respect to the seat frame. When used for a long time, it was forced to sit in a fixed posture, so it took a load on the back and made it difficult to sit down.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a chair that is comfortable to sit on.

In order to solve the above problems, the chair of the present invention is:
An L-shaped member that is elastically deformable around a corner, a plate-like member that is rotatably attached to one side of the L-shaped member sandwiching the corner, the plate-like member, and the L-shape A sheet member stretched between the other side of the shaped member,
One side of the L-shaped member can be used as a seat, and the other side of the L-shaped member can be used as a backrest.
According to this feature, at the time of sitting, the plate-like member rotates downward about the attachment portion on one side of the L-shaped member according to the weight of the seated person, and the seat member sits on the other side of the L-shaped member. The force that causes the backrest to tilt forward about the corner of the L-shaped member acts on the corner and the lower side, and this force is the reaction force of the force that causes the back of the seated person to tilt the backrest backward. It becomes. Therefore, the back can be supported with a reaction force that matches the weight and seating position of the seated person, and a chair that is comfortable to sit on can be provided. Furthermore, since a plate-like member having a bending strength stronger than that of the seat member is arranged on the seat side, local sinking of the seat is suppressed when seated, and the seat member is pulled in a more laid state. It is easy to convert the load acting on the seat into a force that tilts the backrest forward.

The plate-shaped member is included in the sheet member.
According to this feature, the attachment strength of the plate-like member to the sheet member is high, and the deformation of the sheet member is smooth because the sheet member is stretched from the attachment portion on one side of the L-shaped member to the other attachment portion. Become.

The backrest extends upward from a connection portion on the other side with the seat member.
According to this feature, the distance between the connecting portion of the backrest on the other side of the seat member and the corner of the L-shaped member is shorter than the distance from the upper end of the backrest to the corner of the L-shaped member, Since the influence of the force applied to the backrest is greater than the force applied to the seat, a large amount of backrest movement can be secured during reclining.

The L-shaped member includes a pair of support frames, a first connection rod that connects the pair of support frames, and a second connection rod.
The sheet member is stretched between the first connecting rod and the second connecting rod.
According to this feature, the L-shaped member can be configured to be lightweight, and the backrest and the seat can be relatively easily bent.

The second connecting rod is provided at a position higher than the corner portion.
According to this feature, since the position of the knee can be increased, a seated person's load can be suitably applied to the seat.

A cushion member is arranged on the backrest and the seat.
According to this feature, the load applied to the backrest and the seat can be distributed and transmitted in the surface direction by the cushion member. Further, the cushion member of the seat can transmit the load further dispersed in the surface direction by the plate-like member.

Another cushion member is disposed between the cushion member disposed on the backrest and the cushion member disposed on the seat.
According to this feature, each cushion member easily follows the deformation of the backrest and the seat.

It is a perspective view which shows the chair in Example 1. FIG. It is a perspective view which shows the structure of a chair main body. It is explanatory drawing which shows the tilting operation | movement of a backrest. It is a side view which shows the structure of a base body. (A) is a sectional side view showing a state where a small load is applied to the seat, and (b) is a side sectional view showing a state where a large load is applied to the seat. (A) is a side sectional view showing a state where a seated person is drowning in the backrest in the chair in Example 1, and (b) is a side sectional view showing a state in which the seated person is drowned greatly in the backrest. (A) and (b) are the bottom views which show the tension adjustment mechanism of the sheet | seat member in Example 2. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the chair which concerns on this invention is demonstrated below based on an Example.

  The chair according to the first embodiment will be described with reference to FIGS. Hereinafter, the left side of FIG. 3 will be described as the front side (front side) of the chair, and the left and right sides as viewed from the front side of the chair will be described as the left and right sides of the chair.

  As shown in FIG. 1, the chair 1 is a so-called seat chair used in a living room or the like. The chair 1 mainly includes a chair body 2 and a first cushion 3, a second cushion 4, and a third cushion 5 placed on the chair body 2. In addition, the 1st cushion 3 is arrange | positioned in the front surface of the backrest 21 mentioned later in the chair main body 2, the 2nd cushion 4 is arrange | positioned in the upper surface of the seat 22 mentioned later in the chair main body 2, and the 3rd cushion 5 is the 1st. It is arranged at a position between the 1 cushion 3 and the second cushion 4.

  As shown in FIG. 2, the chair body 2 mainly includes a wooden base body 6, a seat member 7 attached to the base body 6, and armrest frames 8 and 8. As shown in FIGS. 2 to 4, the base body 6 includes a pair of left and right support frames 60, 60 and a first connection rod 61, a second connection rod 62, and a third link that connect the support frames 60, 60. The connecting rod 63 and the fourth connecting rod 64 are provided.

  The support frame 60 includes a horizontal flange 60a that extends horizontally along the floor surface, and a rising flange 60b that extends upward from the upper end of the horizontal flange 60a, and has a substantially L shape in a side view. . The front end side of the horizontal flange 60a is a raised portion 60c that rises upward.

  The rising collar 60b is curved and extended from the rear end of the horizontal collar 60a so as to incline forward and then to bend toward the back side. That is, the rising collar 60b has a dogleg shape, and the corner 60A formed by the horizontal collar 60a on the seat 22 side and the vertical collar 60b on the backrest 21 side has an acute angle. The support frame 60 can be bent and deformed around the corner portion 60A (see particularly FIG. 3).

  Moreover, the 1st connection rod 61 is being fixed between the upright parts 60c and 60c in the support frames 60 and 60, and is installed in the position higher than the corner | angular parts 60A and 60A. The second connecting rod 62 is fixed so as to connect the vicinity of the bent portions (the vicinity of the intermediate portion in the vertical direction) of the rising collar portions 60b, 60b in the support frames 60, 60. The third connecting rod 63 is fixed between the horizontal flange portions 60a and 60a at a position on the back side of the first connecting rod 61. The fourth connecting rod 64 is fixed so as to connect the upper end portions of the rising collar portions 60b, 60b of the support frames 60, 60.

  That is, the base body 6 functions as an L-shaped member having a substantially L-shape in side view that can be elastically deformed around the corners 60A and 60A. In order to facilitate understanding, for convenience, the base body 6 is elastically deformed around the corners 60A and 60A. Hereinafter, the base body 6 is elastically deformed around the corners 60A and 60A. The meaning of

  The base body 6 has a frame shape composed of a pair of left and right support frames 60, 60, a first connecting rod 61, a second connecting rod 62, a third connecting rod 63 and a fourth connecting rod 64. Therefore, for example, it is lighter than a base body composed of a single plate material or the like, and has a structure that is easily bent and deformed with the corner portions 60A and 60A as fulcrums.

  The sheet member 7 is a cloth material having a strength such as canvas, and has a margin between the first connecting rod 61 and the second connecting rod 62 (a state slightly bent so as to be bent downward). It is stretched with. In the present embodiment, in order to facilitate understanding, a predetermined region (a portion extending in the lateral direction) on the front side surrounded by a one-dot chain line in the sheet member 7 is defined as a first region Z1, and a two-dot chain line in the sheet member 7 is used. A predetermined region (a portion extending in the vertical direction) on the rear side surrounded by is described as a second region Z2.

  The seat member 7 is fixed between the first connecting rod 61 and the second connecting rod 62 installed at a position higher than the corner portions 60A and 60A, and the seat member 7 is in a non-use state when not seated. The lowermost end of 7 is arranged above the floor surface. Preferably, even when the base body 6 is bent and deformed with the corner portions 60A and 60A as fulcrums in the sitting state during normal use, the base body 6 does not come into contact with the floor surface (see particularly FIG. 3). Further, the seat member 7 is fixed between the first connecting rod 61 and the second connecting rod 62 and can be deformed into a shape following the seated person.

  Although not shown, the upper end portion of the sheet member 7 is formed in a ring shape by folding the upper end of the sheet member 7 and stitching together. When the base body 6 is assembled, the second connecting rod 62 is attached to the ring. The second connecting rod 62 is fixed by being fixed between the support frames 60 and 60 in the inserted state. Further, the lower end portion of the sheet member 7 is fixed by a stapler in a state of being wound around the first connecting rod 61. According to this, the tension of the sheet member 7 with respect to the base body 6 can be adjusted by the degree of winding of the lower end portion of the sheet member 7 around the first connecting rod 61.

Further, a plate-like member 11 made of a wooden plate material or the like is attached to the front end side of the first region Z1 of the sheet member 7, and the plate-like member 11 is more rigid than the sheet member 7. Specifically, after the plate member 11 is arranged on the front end side of the first region Z1 of the sheet member 7, the plate member 11 is covered with a sheet member 12 different from the sheet member 7, and the sheet member 7 and the sheet member 12 are covered. Are attached to the sheet member 7. That is, the plate-like member 11 can be turned up and down around the first connecting rod 61, which is a portion of the sheet member 7 disposed between the first connecting rod 61 and the plate-like member 11.
The plate-like member 11 is configured to rotate up and down around the first connecting rod 61 by, for example, attaching the lower end portion of the sheet member 7 to the first connecting rod 61 so as to be rotatable. May be.

  Further, one sheet member is formed by the sheet member 7 and the sheet member 12, and the plate-like member 11 is included in the sheet member. Therefore, for example, compared with the aspect in which the plate-like member 11 is attached to the sheet member 7 by a fixing means such as a surface fastener, the attachment strength of the plate-like member 11 to the sheet member 7 is high, and the plate-like member 11 is plate-like to the sheet member 7. The member 11 is difficult to be displaced. Further, since the plate-like member 11 is arranged on the upper surface of the sheet member 7, the plate-like member 11 is not separated from the sheet member 7 in the vertical direction at the time of sitting, and the load acting on the plate-like member 11 from above is as follows. The sheet member 7 is reliably transmitted.

  As shown in FIG. 2, the horizontal flange portions 60 a and 60 a, the raised portions 60 c and 60 c and the first connection rod 61 in the base body 6, and the first region Z <b> 1 on the front side in the seat member 7 are in the chair body 2. A seat 22 is formed. Further, the raised collars 60b and 60b, the second coupling collar 62 and the fourth coupling collar 64 in the base body 6, and the second region Z2 on the rear side in the seat member 7 constitute the backrest 21 in the chair body 2. doing.

  As shown in FIG. 4, the armrest frame 8 includes a first fixed end portion 8 a that is fixed along a portion on the upper end side with respect to an intermediate portion (bent portion) in the rising collar portion 60 b, and a first fixed end portion. A horizontal portion 8b that curves from 8a and extends horizontally in the front side, an inclined portion 8c that curves further from the front end of the horizontal portion 8b and that inclines toward the lower rear side, and a horizontal collar 60a from the tip of the inclined portion 8c And a second fixed end portion 8d that extends rearwardly and is fixed to the horizontal flange 60a. The horizontal portion 8b functions as an armrest for the seated person, can rest the arm of the seated person, and can smoothly take off and seat using the horizontal portion 8b.

  The portion between the horizontal portion 8b and the inclined portion 8c is a first curved portion 8e, and the portion between the first fixed end portion 8a and the horizontal portion 8b is a second curved portion 8f. The portion between the inclined portion 8c and the second fixed end portion 8d is a third bending portion 8g, and the first bending portion 8e, the second bending portion 8f, and the third bending portion 8g are Flexural deformation is possible.

  According to this, at the time of bending deformation with the corner portions 60A, 60A of the support frames 60, 60 described in detail later as fulcrums, the first bending portions 8e, 8e, the second bending portions 8f, 8f, and the third The first bending portions 8e, 8e, the second bending portions 8f, 8f, and the third bending are allowed while allowing the bending deformation of the support frames 60, 60 by allowing the bending portions 8g, 8g to follow and bend. Unnecessary bending of the support frames 60, 60 is suppressed by the reaction force of the portions 8g, 8g.

  In the armrest frames 8 and 8, the first fixed end portion 8a and the second fixed end portion 8d are fixed to the horizontal hook portion 60a and the rising hook portion 60b by screws (not shown). That is, the armrest frames 8 and 8 can be attached to and detached from the base body 6, and the presence or absence of the armrest frames 8 and 8 can be selected according to the needs of the seated person.

  Next, how the seated person sits on the seat 22 will be described with reference to FIG. FIG. 5A is a side sectional view showing a state in which a small load is applied to the seat, and FIG. 5B is a side sectional view showing a state in which a large load is applied to the seat. In the following, illustration of the structure of the armrest frames 8, 8 is omitted.

  As shown in FIG. 5A, when a small load G1 is applied to the seat 22, the load G1 is applied to the first region Z1 of the seat member 7 by the second cushion 4 and the plate-like member 11. The first region Z1 of the sheet member 7 is transmitted in a distributed manner in the surface direction, and can be suitably pressed downward without locally sinking greatly.

  Thus, when the first region Z1 of the sheet member 7 is pressed downward, the second region Z2 of the sheet member 7 acts to pull the second connecting rod 62 downward in the forward direction. By this tensile force, the backrest 21 tilts so as to fall in the arrow S direction (forward direction) with the left and right corners 60A and 60A as fulcrums.

  Further, as shown in FIG. 5B, when a load G2 larger than the load G1 is applied to the seat 22, the seat 22 is lowered through the second cushion 4 in the same manner as described above. A load G2 is applied in the direction, and the first region Z1 of the sheet member 7 is pressed downward. When the first region Z1 of the sheet member 7 is pressed downward, the backrest 21 tilts so as to fall in the arrow S direction (forward direction) with the left and right corners 60A and 60A as fulcrums.

  As described above, when a load G2 larger than the load G1 is applied to the seat 22, the seat 22 is more moved than the amount of movement L10 forward of the backrest 21 when the load G1 is applied to the seat 22. On the other hand, the forward movement amount L20 of the backrest 21 when the load G2 is applied becomes larger (L10 <L20). That is, for example, the amount of movement of the backrest 21 in the direction of arrow S changes depending on when a heavy occupant puts weight on the seat 22 or a light occupant puts weight on the seat 22. It is supposed to be. The amount of movement of the backrest 21 in the direction of arrow S is a reaction force when the seated person leans on the backrest 21 (a force that tilts the backrest 21 backward) as will be described later.

  In other words, since the reaction force applied to the back of the seated person changes in proportion to the weight of the seated person, the back can be supported with the reaction force that matches the weight of each seated person. In addition, since the backrest 21 bends and deforms following the movement of the seated person, the load applied to the seated person can be reduced even when sitting for a long time, and the sitting comfort is improved.

Moreover, since the 1st area | region Z1 of the sheet | seat member 7 is reinforced by the plate-shaped member 11, and the local bending deformation etc. of the 1st area | region Z1 are prevented, a seated person's buttocks vicinity can be supported stably. At the same time, the sheet member 7 is pulled in a more laid state compared to the case where the plate member 11 is not disposed and only the sheet member 7 is configured, and the load acting on the seat 22 (for example, the load G1). Or the load G2) is easily converted into a force that tilts the backrest 21 forward. Furthermore, since the load G1 and the load G2 dispersed in the surface direction by the second cushion 4 can be received by the upper surface of the plate-like member 11, the load G1 and the load G2 are directed toward the second connecting rod 62 downward. It can be easily converted into a pulling force, and the backrest 21 can be easily tilted forward.
Further, since the plate-like member 11 is included in one sheet member formed by the sheet member 7 and the sheet member 12, the plate-like member 11 and the plate-like member 11 are closer to the backrest 21 side. Bending deformation (bending deformation) with respect to the seat member 7 (substantially the second region Z2) to be arranged is suppressed, and the seat member 7 is smoothly deformed at the time of sitting, so that sitting comfort is improved.

  As described above, the corners 60A and 60A have a structure in which the backrest 21 is inclined forward and has an acute angle in a non-use state (a state before a load is applied to the seat 22). Therefore, when the load G1 or the load G2 is applied to the seat 22, the load G1 or the load G2 is easily converted into a tensile force that tilts the backrest 21 forward.

  Further, in order to make the corners 60A and 60A have an acute angle, the vicinity of the lower end portion of the rising collar 60b is inclined forward, but the rising collar 60b is behind the intermediate portion (bending portion). Since the bent portion of the rising collar 60b is more likely to bend backward than the bent portion of the rising collar portion 60b, the operation is performed when a large load is applied to the backrest 21. It is easy to follow and can support a seated person's back suitably.

  As shown in FIG. 6A, when the seated person leans on the backrest 21, the load G3 on the back side of the seated person via the first cushion 3 is changed to the second connecting rod 62, the fourth connecting rod 64, and It is applied to the rising collars 60b, 60b. According to this, the backrest 21 is bent and deformed with the corner portions 60A and 60A as fulcrums while applying a reaction force to the back of the seated person.

  When the seated person falls on the backrest 21, the weight of the seated person can be entrusted to the backrest 21, so that the load applied to the seat 22 compared to the case where the seated person cannot lean on the backrest 21. Becomes smaller (illustrated as a load G4).

  As described above, the load G3 of the seated person on the backrest 21 is transmitted by being distributed in the surface direction to the second connecting rod 62, the fourth connecting rod 64, and the rising collar portions 60b, 60b by the first cushion 3. , Can be suitably pressed toward the rear. Further, since the second connecting rod 62 and the fourth connecting rod 64 do not directly contact the seated person's back, the seated person's back does not feel pain.

  Since the first cushion 3 is formed wider than the second cushion 4 and the third cushion 5, and the first cushion 3 is placed on the rising collar portions 60b and 60b, the load G3 described above is dispersed. It is easy to be done.

  5 and 6, the distance L1 from the corner 60A to the second connecting rod 62 (the distance from the fulcrum (rotation center) of the backrest 21 to the point of application of the tensile force of the seat member 7). ) Is shorter than the distance L2 from the corner 60A to the fourth connecting rod 64 (the distance from the fulcrum (rotation center) of the backrest 21 to the point of action of the force tilting backward of the seated person) ( L1 <L2). That is, since the backrest 21 has a smaller amount of movement of the backrest 21 in front than the amount of movement of the backrest 21 in the rearward direction, the backrest 21 is prevented from being excessively tilted forward. Can be prevented. In other words, since the influence of the force applied to the backrest 21 is greater than the force applied to the seat 22, the amount of movement of the backrest 21 is reduced during reclining (when the back is greatly tilted backward). Largely secured.

  Further, as shown in FIG. 6 (b), during reclining, the balance of the center of gravity of the seated person is larger on the rear side than in the state shown in FIG. 6 (a), so the load G3 ′ applied to the backrest 21 is 6 (a), the load G3 is larger than the load G3 applied to the backrest 21 (load G3 <load G3 ′). On the other hand, the load G4 ′ applied to the seat 22 is largely backrest 21. 6A, the seated person's buttocks and the like are lifted more than in FIG. 6A, and become smaller than the load G4 applied to the seat 22 in FIG. 6A (load G4> load G4 ′). That is, the reaction force from the backrest 21 is reduced, and the backrest 21 tends to tilt backward, so that the seated person can recline more greatly. In addition, since the seat back 21 is largely tilted rearward, the seat member 7 is pulled in the direction in which the seat member 7 is more tensioned, so that the seating member's support force by the seat member 7 is also improved.

  Further, the rising collar portions 60b, 60b have a portion extending above the second coupling rod 62, which is a coupling portion on the upper end side of the sheet member 7, and the portion extending upward is pulled by the tension of the sheet member 7. Since the force does not act directly, at the time of reclining, the portion extending upward from the second connecting rod 62 in the rising collar portion 60b, 60b is bent rearward by the load G4 ′ at the time of the second reclining, and suitable reclining It can be an angle.

  The second connecting rod 62 is provided at a position higher than the corner portions 60A, 60A, and the lower end portion of the seat member 7 is attached to the second connecting rod 62, so that the position of the seated person's knee Is held at a high position, and a seated person's load can be suitably applied to the seat 22.

  Moreover, the 1st cushion 3, the 2nd cushion 4, and the 3rd cushion 5 are each divided | segmented and arrange | positioned. Although not shown, the first cushion 3 is fixed to the fourth connecting rod 64, the second cushion 4 is fixed in the vicinity of the first connecting rod 61, and the third cushion 5 is Since the first cushion 3, the second cushion 4, and the third cushion 5 are not fixed between the first cushion 3 and the second cushion 4, each of the first cushion 3, the second cushion 4, and the third cushion 5 is resistant to deformation of the backrest 21 and the seat 22. Easy to follow. In addition, in the present Example, although the 1st cushion 3, the 2nd cushion 4, and the 3rd cushion 5 were divided | segmented, adjacent cushions may be connected and integrated.

  In FIG. 6A, an example in which the seated person's waist is seated so that the vicinity of the waist is not in contact with the third cushion 5 is illustrated. 3 It will be in the state which contacts the cushion 5. FIG.

  Next, a chair according to Example 2 will be described with reference to FIG. In addition, description of the same structure which overlaps with the said Example is abbreviate | omitted.

  As shown in FIG. 7, the chair 100 according to the present embodiment includes a tension adjusting mechanism 30 for the seat member 7, and the tension adjusting mechanism 30 is provided at the lower end of the seat member 7 (on the first connecting rod 61 side). It is provided on the back side.

  Specifically, the tension adjusting mechanism 30 includes three surface fasteners 31 having hook-shaped elements provided around the lower edge of the sheet member 7, and three at predetermined intervals at positions spaced from the surface fastener 31 in the longitudinal direction of the sheet member 7. And hook-and-loop fasteners 32, 33, and 34 having loop-shaped elements arranged in parallel. Here, for convenience of explanation, the hook and loop fastener 31 is shown by shading, and the hook and loop fasteners 32, 33, and 34 are shown by dots.

  The lower end portion of the sheet member 7 is wound from the upper surface side to the lower surface side of the first connection rod 61, and the surface fastener 31 is engaged with any one of the surface fasteners 32, 33, and 34 to form the first connection. It is fixed to the flange 61.

  For example, when it is desired to loosen the sheet member 7, the hook and loop fastener 31 may be engaged with the hook and loop fastener 32 closest to the hook and loop fastener 31 as shown in FIG. Further, when it is desired to tighten the sheet member 7 tightly, the hook and loop fastener 31 may be engaged with the hook and loop fastener 34 farthest from the hook and loop fastener 31. That is, by selecting the engagement position of the surface fastener 31 from the surface fasteners 32, 33, 34, the sheet member 7 can be adjusted to a desired tension.

  The tension adjusting mechanism is not limited to that of the second embodiment. For example, a button or the like may be adopted instead of the hook-and-loop fastener, and the tension of the sheet member can be adjusted by a winding shaft mechanism such as a reel. It may be.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the base body 6 having a substantially L shape in side view has been described as an L-shaped member. However, the L-shaped member is not limited to an L-shaped outer shape of the structure, For example, a fixed portion that has a structure portion on one side and a structure portion on the other side across a deformable corner portion, and one end of the sheet member is fixed to the structure portion on the one side, and a structure portion on the other side On the other hand, the line connecting the fixed portion to which the other end of the sheet member is fixed and the corner portion may be substantially L-shaped.

  Moreover, in the said Example, although the sheet | seat member 7 was stretched | stretched in the state bent below by the side view, for example, you may be stretched | stretched so that it may become substantially linear shape by a side view. Further, although the sheet member 7 is stretched between the first connection rod 61 and the second connection rod 62, for example, the sheet member 7 may be stretched between the first connection rod 61 and the fourth connection rod 64. Good.

  Moreover, in the said Example, although comprised from the left-right paired support frames 60 and 60, the 1st connection rod 61, the 2nd connection rod 62, the 3rd connection rod 63, and the 4th connection rod 64, for example, In addition, it may be composed of a single plate material that is substantially L-shaped in side view.

  In the embodiment, the first cushion 3, the second cushion 4, and the third cushion 5 are used. For example, the first cushion 3, the second cushion 4, and the third cushion 5 are not used, and the seat member 7 is used. You may sit directly on it.

  Moreover, although the example which provided the armrest frames 8 and 8 was demonstrated in the said Example, the chair which does not comprise an armrest frame may be sufficient.

In the above embodiment, the plate-like member 11 made of a wooden plate material or the like has been described as an example. However, the plate-like member 11 only needs to be more rigid than the sheet member 7, and may be a resin molded product or metal. May be.
Moreover, although the rectangular shape has been described as an example of the shape of the plate-like member 11, it may be any shape that supports the buttocks and the thighs, and the shape may be other shapes such as a circle and an ellipse.

  In addition, in the said Example, although the sheet | seat member 7 was comprised by the member which is hard to expand-contract, such as a canvas, if the tension | pulling force which tilts the backrest 21 to the front side at the time of seating can be provided, You may be comprised by the member which can be expanded or contracted somewhat, such as hard rubber.

Moreover, in the said Example, although the plate-shaped member 11 demonstrated the state attached with respect to the sheet | seat member 7 stretched between the 1st connection rod 61 and the 2nd connection rod 62 in the base body 6, For example, the front end of the plate-like member 11 is attached to the first connection rod 61 by a hinge member or the like so as to be pivotable up and down about the first connection rod 61, The sheet member 7 may be stretched between the second connecting rod 62.
Moreover, in the said Example, although the plate-shaped member 11 illustrated the form included in the sheet member formed of the sheet member 7 and the sheet member 12, the upper surface of the 1st area | region Z1 of the sheet member 7 was illustrated. Or you may fix in the state exposed to the lower surface. In addition, the attachment means of the plate-shaped member 11 with respect to the sheet | seat member 7 can change freely, such as a hook-and-loop fastener and an adhesive agent.

DESCRIPTION OF SYMBOLS 1 Chair 2 Chair main body 3 1st cushion 4 2nd cushion 5 3rd cushion 6 Base body (L-shaped member)
7 Seat member 11 Plate-like member 21 Backrest 22 Seat 30 Tension adjustment mechanism 60 Support frame 60A Corner portion 60a Horizontal flange portion 60b Standing flange portion 60c Upright portion 61 First connecting rod 62 Second connecting rod 63 Third connecting rod 64 4th connecting rod 100 chair

Claims (7)

An L-shaped member that is elastically deformable around a corner, a plate-like member that is rotatably attached to one side of the L-shaped member sandwiching the corner, the plate-like member, and the L-shape A sheet member stretched between the other side of the shaped member,
A chair characterized in that one side of the L-shaped member can be used as a seat, and the other side of the L-shaped member can be used as a backrest.   The chair according to claim 1, wherein the plate-like member is included in the seat member.   The chair according to claim 1 or 2, wherein the backrest extends upward from a connection portion on the other side with the seat member. The L-shaped member includes a pair of support frames, a first connection rod that connects the pair of support frames, and a second connection rod.
The chair according to any one of claims 1 to 3, wherein the seat member is stretched between the first connecting rod and the second connecting rod.   The chair according to claim 4, wherein the second connecting rod is provided at a position higher than the corner portion.   The chair according to any one of claims 1 to 5, wherein a cushion member is disposed on the backrest and the seat.   The chair according to claim 6, wherein another cushion member is disposed between the cushion member disposed on the backrest and the cushion member disposed on the seat.

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