JP3189545U - Chairs and chair sets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optimum sitting comfort, or when the body shape of a person sitting on a chair changes due to aging, illness, etc., the optimum sitting comfort is obtained by selecting a favorite seat portion and attaching it to a desired position. Also, if the seat is damaged or soiled, only the seat can be easily replaced. SOLUTION: In a chair having a leg portion 50 and a back portion 40, the seat portion 10 can be attached and detached, and a double-sided fastener 30 is engaged with a position where a bottom portion 15 of the seat portion and a top portion of a receiving portion 20 face each other. Are arranged. As a result, the seat portion 10 selects a comfortable position for the person sitting on the chair with respect to the receiving portion 20, and the seat portion 10 is mounted. In addition, by replacing the seat with a seat having a different thickness, material, and shape, the chair can be optimally comfortable to sit on even if the body shape is different. [Selection diagram] Fig. 1

Description

  The present invention relates to a chair and a chair set that include a leg portion and a back portion and in which a seat portion can be easily replaced. In detail, if you want to get the best sitting comfort, or if the body shape of the person sitting on the chair changes due to aging or illness, etc., you can select your favorite seat and attach it to the desired position The present invention relates to a chair and a chair set that can provide a comfortable sitting comfort.

  In the case of a conventional chair, when removing the seat, it is necessary to remove the screw fixing the seat and remove the seat with the seat frame, so the seat cannot be easily replaced. . For this reason, there is a problem that even a small body person or a person whose body shape has changed due to aging, illness, etc., must sit down according to the seating surface of the chair being used, and optimal sitting comfort cannot be obtained. It was. In addition, even if a part of the seat surface is damaged or dirty, it is necessary to replace the entire chair body.In the case of a chair set in which multiple chairs are set, a large expense is required for replacement. I needed it.

  Patent Document 1 discloses a technique of a chair that can eliminate waist fatigue and pathological body, and that the seat portion has three types of hardness, hard, medium and soft, and these can be easily replaced. ing. In this technique, the seat receiving surface that receives the seat portion has a predetermined downward slope, and the backrest portion corresponds to the position of the lumbar spine of the person sitting on the chair. Since the seating surface is inclined downward, the back muscles are extended and the posture is improved, and the backrest part is located at the position corresponding to the predetermined lumbar vertebra, so that the lumbar spine is stimulated and the fatigue of the lumbar is resolved Has been.

  However, in the technique of Patent Document 1, in a state where a person sitting on a chair is sitting on the seat, the backrest is set to a position corresponding to a predetermined lumbar vertebra, and the seat, the backrest, and the seat receiving surface are set to a predetermined position. It was necessary to be fixed in a positional relationship. According to the technique of Patent Document 1, even if it is possible to easily replace the seat portion, the position of the seat portion is moved back and forth with respect to the receiving portion according to the body shape of the person sitting on the chair. The position cannot be adjusted, and the problem of providing an optimal sitting comfort for a person sitting in a chair could not be solved.

  In Patent Document 2, it is easy to align the seat or the back pad, and it is difficult for the pad to come off during use. The technology of a detachable chair is disclosed. In this technique, the body support structure of at least one of the seat and the back is separated into a pad that hits the human body and a structure body that supports the pad, and is configured to be detachable via a joining means.

  Further, the structure body is provided with an edge portion that surrounds the periphery of the pad and forms a recess for fitting the pad inside. It is supposed that the pad can be easily replaced by making the pad detachable through the joining means. And since a pad is fitted and attached to a recessed part, a pad does not remove | deviate during use, and it is supposed that the position of a pad does not shift | deviate for every replacement.

  In the technique of Patent Document 2, the pad is fitted into the recess, and the position of the pad is always maintained at a constant position, so that the structure body that is the pad and the receiving portion is always in a fixed positional relationship. It is fixed to. According to the technique of Patent Document 2, the seat part can be easily replaced, but the position cannot be adjusted by moving back and forth with respect to the receiving part, and provides an optimal sitting comfort for a person sitting in a chair. This problem could not be solved.

Patent Document 1: JP 2008-149110 A Patent Document 2: JP 2007-117600 A

  The problem to be solved by the present invention is to select the desired seating position when you want to get the best sitting comfort or when the body shape of the person sitting on the chair changes due to aging or illness, etc. It is to provide a chair that can obtain an optimal sitting comfort by being attached to a chair. Another object of the present invention is to provide a chair that can easily replace only the seat when the seat is damaged or soiled.

  According to a first aspect of the present invention, there is provided a girder member in which a seat portion is detachable, and in which a seat portion includes a leg portion and a back portion, and the receiving portion of the seat portion is arranged to be spaced apart toward the front of the seat portion. A double-sided fastener that engages a facing portion is arranged at each facing position of a bottom portion of the seat portion and a top portion of the girder member, and the seat portion is a seat portion with respect to the receiving portion It is characterized in that it can be removed by selecting a position in the front-rear direction.

  Since the double-sided fasteners arranged on the top of the girder member are arranged extending in the front-rear direction of the seat part, the position of the seat part is adjusted in the front-rear direction with respect to the receiving part, and a desired position of the person sitting on the chair It is possible to select and remove. Here, selecting a desired position means that the length of the lower limbs, the length of the upper limbs, the height, the body shape, and other physical characteristics due to different persons sitting in the chair, the sitting posture of the person sitting in the chair The most comfortable position for the person sitting in the chair is selected according to the difference in the height of the desk where the chair faces, the change in the physical characteristics of the person sitting in the chair with aging and illness, etc. Say.

  It is only necessary that a detachable double-sided fastener is arranged at a position facing the girder member on the bottom surface of the seat, and the shape, thickness, heat retention, breathability, material, hardness, size, etc. of the seat are as follows: It is not limited. The double-sided fastener may be any one of known engaging means in addition to the one in which the flange portion and the ring portion are engaged, the case in which the hook-shaped head portion is engaged with the ring portion. In addition, it is sufficient that the double-sided fastener is formed to extend in the front-rear direction, and the width, shape, and the like are not limited. In addition, since the seat portion is detachable and can be easily replaced, only the seat portion can be replaced when contamination or the like occurs or when the design of the chair as an interior is to be changed.

  Since the girder members are spaced apart so that the lower part of the seat part is vacant, moisture does not stay between the seat part and the receiving part, and moisture is released downward from the bottom part of the seat part, so that the receiving part is not easily deformed. Moreover, even if the seat is removed from the chair and deformed so that the seat is twisted while being stored for a long time, the seat is only supported by a girder member extending side by side. It is easy to follow the girder member, and the seat portion is stably supported.

  The receiving portion only needs to include a girder member that is spaced apart and arranged toward the front of the seat portion, and its shape, material, and the like are not limited. Moreover, if the leg part connection member and the girder part which connect the leg parts located in a line with the right and left of a chair are connected to the receiving part by the diagonal reinforcement member, a receiving part will not deform | transform in a horizontal surface direction. The double-sided fastener may be provided at least at the top of the beam member. The double-sided fastener may be a known double-sided fastener that is engaged with each other by pressing the engaging portion such as the collar and the ring portion, and disengaged from each other by being separated.

  The shape, number, material, etc. of the leg portions are not limited. Further, when armrests are provided on both sides of the seat, it is preferable that the seat is not tilted because the seat is sandwiched between the armrests. The back portion is preferably open at the bottom so that the seat portion can be adjusted to a desired position, but is not limited thereto.

  Thus, even if the body type of the person sitting in the chair is different or the body type of the person sitting in the chair changes due to aging, illness, etc., the sitting position is optimal for the person sitting in the chair. The position of the part can be adjusted. Moreover, when a seat part becomes dirty, only a seat part is replaced | exchanged and it can be used in the state of a beautiful chair, using the same chair frame for a long period of time. Furthermore, using the same chair frame, it is possible to select a favorite seat from a plurality of types of seats to obtain a chair with a desired design.

  According to a second aspect of the present invention, in the chair according to the first aspect, a guide member that guides the mounting position of the seat portion in the front-rear direction in contact with the side portion of the seat portion on at least one side portion of the receiving portion. It is characterized by being equipped. The guide member is not limited as long as the guide member is in contact with the side portion of the seat portion and can be guided so that the mounting position of the seat portion can be easily determined.

  This facilitates adjustment of the position at which the seat portion is mounted on the receiving portion along the side surface of the seat portion along the guide member. Moreover, it becomes possible to mount the seat portion straight toward the front of the chair so as not to tilt.

  According to a third aspect of the present invention, in the chair according to the first or the second aspect, the bottom of the seat is in contact with either side of the beam member and guides the mounting position of the seat in the front-rear direction. It is characterized in that a guiding member is provided. The guide member may be a plate body or the like extending along the side of the girder member, as long as the guide member is in contact with the side of the girder member and is guided so that the mounting position of the seat portion can be easily determined, The shape and the like are not limited.

  Accordingly, the position adjustment of mounting the seat portion on the receiving portion with the guide member of the seat portion along the side of the girder member is facilitated. Moreover, it becomes possible to mount the seat portion straight toward the front of the chair so as not to tilt.

  According to a fourth aspect of the present invention, in the chairs according to the first to third aspects, the chair includes a locking member that prevents the seat part from being detached, and the locking tool is connected to the seat part and the receiving part. It is characterized by locking the part. The locking tool is not limited as long as it is a locking tool such as a known binding belt. Moreover, what is necessary is just to make a latching tool latch a seat part and a girder member, for example, and the location of either a seat part and a receiving part should just be latched. Thereby, even if the person who sits on a chair changes a posture and the load to a seat part is biased, also when holding a seat part and lifting a chair, a seat part does not come off from a receiving part easily.

  According to a fifth aspect of the present invention, in the chairs according to the first to fourth aspects, the beam member is provided with a deformation preventing member in a horizontal plane direction only in the vicinity of the end portion thereof. The deformation preventing member only needs to be prevented from being deformed in the horizontal plane of the receiving portion by an oblique reinforcing material, an L-shaped metal fitting, or the like. Moreover, if it is provided only in the vicinity of the end portion, the chair does not sway while the space is maintained below the seat portion, and moisture from the seat portion is easily released.

  According to a sixth aspect of the present invention, in the chairs according to the first to fifth aspects, the back portion can be tilted. The inclination angle of the back portion may be fixed so that the back portion that can be axially moved with respect to the chair frame can be inclined so as to adapt to the back of the person sitting on the chair. This makes it possible for the elderly who have been bent due to aging and for those who sit on the back like a sofa to sit on the back of the chair so that the back of the chair fits into the back of the chair. can do.

  According to a seventh aspect of the present invention, in the chair set including the chairs of the first to sixth aspects and a plurality of seats having different characteristics, each of the plurality of seats is locked to the receiving part. It features a double-sided fastener. Here, the seats having different characteristics refer to form, thickness, heat retention, air permeability, material, hardness, size, and the like. For those who are short, such as children and the elderly, the height from the floor is reduced as a thin seat, and for those who are tall, the thickness of the seat is increased. The chair can be made comfortable by adjusting the height of the chair. In addition, in order to make the seating comfort constant even if the seats have different thicknesses, when using thick seats, the upper side should be made of a soft cushion material and the lower side should be made of a highly rigid material. .

  In addition, a seat with good air permeability may be used in summer, and a seat with high heat retention may be used in winter, and the seat may be replaced with a material having an optimum material according to the season. Moreover, it is good also as what incorporates an electric heater etc., and it is good also as a chair with a small pressure to a buttocks for the patient of a heel by making a hole in the position where a buttock rests.

  Thereby, even if the person who sits in a chair using the same chair frame differs, a comfortable and comfortable chair can be provided. In addition, a more comfortable chair can be obtained by selecting an optimal seat according to the season used, the preference of the person sitting in the chair, and the like. Manufacturers can also easily provide multiple variations of chair sets using the same chair frame.

-According to the first idea of the present invention, even if the body shape of the person sitting in the chair is different or the body shape of the person sitting in the chair changes due to aging, illness, etc., it is optimal for the person sitting in the chair It is possible to adjust the position of the seat to a position that provides a comfortable sitting comfort. Moreover, when a seat part becomes dirty, only a seat part is replaced | exchanged and it can be used in the state of a beautiful chair, using the same chair frame for a long period of time. Furthermore, using the same chair frame, it is possible to select a favorite seat from a plurality of types of seats to obtain a chair with a desired design.
-According to the second device of the present invention, it is easy to adjust the position of mounting the seat portion on the receiving portion with the side surface of the seat portion being along the guide member. Moreover, it becomes possible to mount the seat portion straight toward the front of the chair so as not to tilt.
-According to the third device of the present invention, it is easy to adjust the position where the seat portion is mounted on the receiving portion by bringing the guide member of the seat portion along the side of the girder member. Moreover, it becomes possible to mount the seat portion straight toward the front of the chair so as not to tilt.

-According to the fourth aspect of the present invention, even if the person sitting in the chair changes his / her posture and the load on the seat is biased, the seat will be detached from the receiving part even when the chair is lifted by grabbing the seat. Hateful.
-According to the fifth aspect of the present invention, the chair does not wobble while maintaining a space below the seat, and moisture from the seat is easily released.
・ According to the sixth invention of the present invention, the back of the person sitting on the chair fits the back of the chair, whether it is an elderly person whose waist is bent due to aging or a person leaning on the back like a sofa. It can be set as the chair which can obtain the optimal sitting comfort.
According to the seventh aspect of the present invention, it is possible to provide a comfortable and comfortable chair using the same chair frame and having a different seat. In addition, a more comfortable chair can be obtained by selecting an optimal seat according to the season used, the preference of the person sitting in the chair, and the like. In addition, the manufacturer can easily provide a plurality of variations of chair sets using the same chair frame.

The perspective view explaining a chair (Example 1). The side view explaining the state by which the position of the seat part was adjusted according to the person who seats (Example 1). Sectional drawing explaining the chair by which the guide member was provided in the seat part (Example 2). Sectional drawing explaining the chair provided with the guide member in the girder member (Example 3). Sectional drawing explaining the chair with which the locking tool was provided (Example 4). The side view explaining the chair which can incline a back part (Example 5).

  Hereinafter, embodiments of the chair of the present invention will be described with reference to the drawings. In any of the following embodiments, the size and shape of the leg portion, back portion, and receiving portion of the chair are not changed and will be described as the same chair frame.

  With reference to FIG. 1 and FIG. 2, a first embodiment of the chair in which the position of the seat can be adjusted and the seat can be replaced will be described. FIG. 1 is an explanatory diagram for explaining the configuration of the chair according to the first embodiment with a perspective view. FIG. 2 is a diagram illustrating a seating comfort by adjusting the thickness and position of the seat when the body shape of the person sitting on the chair is different. It is explanatory drawing explaining the chair which improved it with the side view.

  First, the configuration of the chair 1 will be described with reference to FIG. 1A is a perspective view of the chair 1, and FIG. 1B is a perspective view of the seat 10 viewed from the bottom 15 side and a perspective view of the chair 1 with the seat removed. is there. In FIG. 1B, the front leg 50 and the armrest 52 on the front side are omitted from the drawing for easy understanding. The chair 1 has a height of about 40 cm from the floor to the seat, a thickness of the seat is about 10 cm, a height from the floor to the top of the back is about 80 cm, a width of about 50 cm, and a depth of about 45 cm. The chair.

  The chair 1 includes a chair frame formed by two front leg portions 50, two rear leg portions 51, an armrest 52 bent with the leg portions and the seat portion interposed therebetween, and a seat portion 10. And the back portion 40. The back of the armrest 52 extends upward with the back 40 interposed therebetween. Further, below the back portion 40, a back vent 41 is formed as a gap.

  The seat portion 10 has a substantially rectangular parallelepiped shape, and is formed such that the front side bulges laterally, and the bulge portion 16 contacts the front surface of the armrest 52. The length of the seat portion 10 is a length that slightly protrudes from the spine 41 in a state where the bulging portion 16 is in contact with the armrest 52. The thickness of the seat is different for each seat, and the height from the floor can be changed according to the body shape of the person sitting on the chair (see FIG. 2). Further, the seat portion 10 is provided with a stripe-like double-sided fastener 30 at a position facing the girder member 21 on the bottom portion 15 thereof.

  The seat portion 10 can be attached at different positions by changing the position where the double-sided fastener 30 is engaged in the front-rear direction. Here, the position of the seat portion 10 is not particularly limited to a position slightly protruding from the spine 41 and may be a position where a person sitting on a chair can obtain a suitable sitting comfort.

  The receiving portion 20 includes leg connecting members 22, 23, a girder member 21 laid between the leg connecting members, and an oblique direction for fixing the leg connecting member and the girder member to prevent deformation. The reinforcing member 24 is constituted. The top part of the girder member 21 is provided with a streaked double-sided fastener 30 at a position facing the bottom part 15 of the seat part. Moreover, the girder members 21 are arranged so as to be separated from each other so that a space is formed below the seat portion.

  The leg connecting members 22 and 23 are installed over the left and right leg portions to connect the left and right leg portions, and the leg connecting members 22 and 23 are arranged so that there is a space below the seat portion. . The diagonal reinforcing member 24 connects the beam member 21 and the leg connecting portions 22 and 23 diagonally so that a space is formed below the seat portion.

  Next, referring to FIG. 2 (A) to FIG. 2 (D), an example of a chair in which the thickness and position of the seat is adjusted to suit the person having a different body shape, etc., and the seat comfort is optimal. explain. Moreover, in each figure, structures other than the position and thickness of a seat part are the same as that of the chair 1. FIG. In order to facilitate understanding, the armrests are not shown.

  First, FIG. 2A shows a state in which an elderly woman 60 whose waist is bent due to aging is sitting on the chair 2. The seat portion 11 is shifted rearward so as to match the length from the upper limb 62 to the buttocks 63 of the female 60, and the position is adjusted so that the back of the knee and the front of the seat are close to each other. Further, the seat portion having a small thickness is selected so that the height h1 of the seat surface from the floor surface 17 is slightly shorter than the length of the lower limb portion 61 of the woman 60, so that the feet can easily reach the floor surface. ing. As described above, the chair 2 is adjusted in the height and position of the seat portion, so that the entire sole of the foot reaches the floor surface 17 in a state where the back portion 40 is in light contact with the bent back, and the body shape of the woman 60 It becomes the chair with the best comfortable seating to suit.

  Next, FIG. 2B shows a state in which a fat man 70 is sitting on the chair 3. The seat 12 is adjusted to a position that matches the length from the upper limb 72 to the buttocks 73 of the male 70. Further, a seat portion having a small thickness is selected so that the height h2 of the seat surface from the floor surface 17 is slightly shorter than the length of the lower limb portion 71 of the male 70, so that the foot can easily reach the floor surface. . Thus, when the male 70 is seated on the chair 3 in which the position and height of the seat are adjusted, the entire sole of the foot reaches the floor surface 17 with the back portion 40 in contact with the back, and the body shape of the male 70 is reached. It is considered as the best sitting comfort.

  Next, FIG. 2C shows a state where a tall man 80 is sitting on the chair 4. In accordance with the length of the upper limb portion 82 of the male 80 from the heel portion 83, the position of the seat portion 13 is adjusted to be forward, and the portion that contacts the lower side of the upper limb portion is lengthened. In addition, the seat surface height h3 from the floor surface 17 is selected so that the seat portion is thick so as to match the height of the lower surface of the lower limb portion 81 of the male 80, so that a tight feeling is not felt. ing. By adjusting the position and height of the seat in this way, the back 40 is in contact with the back, and there is no feeling of cramping even if the legs are not thrown forward. It is considered as an optimal sitting comfort.

  Next, FIG. 2D shows a state in which the lower limb portion 91 is thrown forward and is seated on the chair 5 so that the tall man 90 leans on the sofa. The male 90 is about the same height as the male 80. The seat portion 14 is adjusted so as to be in front according to the length from the upper limb portion 92 to the buttocks portion 93 and the sitting posture of the male 90, and the seat portion 13 shown in FIG. In comparison, the portion that contacts the lower side of the upper limb is further lengthened. Further, the height h4 of the seating surface from the floor surface 17 is the same as the height h3 of the seating surface. Thus, even if the chair 5 in which the position and height of the seat are adjusted is used in a relaxed state where the seat 5 leans on the sofa, the chair 5 has an optimum sitting comfort according to the sitting posture of the man 90.

  In Example 2, a chair 6 having a seat with a guide member will be described with reference to FIG. FIG. 3A is an explanatory diagram enlarging a cross section of the seat portion of the chair 6 and the end portion of the receiving portion. For easy understanding, only the periphery of the guide member is shown. FIG. 3A is an explanatory view of the chair 6 in which the guide member 100 is provided at the bottom of the seat, and FIG. 3B is an enlarged view of the double-sided fastener 104.

  The chair 6 has a guide member 100 formed at the bottom of the seat so as to contact the side of the beam member 102. The guide member 100 has a rectangular cross-sectional shape and is formed on the bottom 103 of the seat 101 so as to extend in front of the chair. When attaching the seat portion 101, the inner surface of the guide member 100 is in contact with the outer surface of the beam member 102, and the seat portion 101 is lowered downward in accordance with a desired position in the front-rear direction of the person sitting on the chair. The double-sided fastener 104 provided at the position where the bottom part of the seat part and the top part of the girder member face each other is engaged. If it does so, the seat part 101 can be mounted | worn with the state which the guide member 100 contacted the girder member 102 toward the front. Moreover, the guide member 100 may be provided in any one side part of the girder member 102, and may be provided in both the left and right girder members.

  Here, the double-sided fastener 104 is provided with a collar portion 104a on the seat portion 101 side and an annular portion 104b on the beam member 102 side. Since the collar portion 104a is provided on the seat portion side, even if the seat portion 101 is removed and placed on the floor surface or a carpet, the collar portion 104a is less likely to be entangled with fibers and hair, and the engagement force is reduced. It is hard to decline.

  In the third embodiment, a chair 7 having a guide member in a receiving portion will be described with reference to FIG. FIG. 4 (A) is an explanatory view enlarging a cross section of the seat portion of the chair 7 and the end portion of the receiving portion. For easy understanding, only the periphery of the guide member is shown. 4A is an explanatory diagram of the chair 7 in which the guide member 110 is provided on the side portion of the girder member, and FIG. 4B is an enlarged view of the double-sided fastener 114.

  The chair 7 is formed with a substantially L-shaped guide member 110 having a cross-section bent upward along the side portion of the beam member 112. When attaching the seat portion 111, the seat portion 111 is lowered downward so that the outer surface 113 of the seat portion is in contact with the inner surface of the guide member 110 and is aligned with a desired longitudinal position of the person sitting on the chair. The double-sided fastener 114 provided at a position where the bottom portion of the seat portion and the top portion of the girder member face each other is engaged. The guide member 110 may be provided on any one side of the girder member 112, or may be provided on both the left and right sides.

  A seat leg 115 is provided on the bottom of the seat 111 of the chair 7. As a result, as shown in FIG. 4B, even if the ring portion 114a is provided at the bottom of the seat portion, each ring 111a can be removed and stored horizontally for a long time. Is not crushed and dust is not easily attached. Even if the collar portion 114 b is provided on the top of the girder member 112, the guide member rises from the receiving portion, so that an object is not placed on the girder member 112 and crushed. Since the seat leg 115 is formed, the engagement force of the double-sided fastener part 114 is hardly reduced regardless of whether the collar part and the ring part are provided on the seat part side or the receiving part side.

  In Example 4, the chair 8 provided with the locking tool 120 will be described with reference to FIG. FIG. 4A is an explanatory view of a perspective view of the chair 8 as viewed from the floor side. Further, in order to facilitate understanding, parts other than the seat part and the receiving part are omitted. FIG. 4B is an explanatory view of the chair 8 in a front-rear direction sectional view. Further, only the periphery of the locking tool 120 is shown enlarged for easy understanding.

  The locking tool 120 includes a stopper 121 that fastens and locks the belts, and two belts 122 and 123 attached to the bottom 125 of the seat 124. One end of the belt 122 is attached and fixed to the bottom 125, and a stopper 121 is attached to the other end. One end of the belt 123 is fixed to the bottom 125. The other end of the belt 123 is inserted into the fastener 121 across the leg connecting member 126, and the belts are fastened and locked. Further, the place where the fastener is provided is not limited to the leg connecting member 126 at the back of the chair, and the location is not limited.

  In the fifth embodiment, a chair 9 whose back can be tilted will be described with reference to FIG. FIG. 6A shows the chair 9 as viewed from the side. FIG. 6B shows a state in which an elderly woman 133 whose waist is bent is sitting on the chair 9a. FIG. 6 (C) shows a state where the tall male 135 is sitting on the chair 9b with the lower limbs thrown forward so as to lean on the sofa. Moreover, in each figure of FIG. 6, in order to understand easily, an armrest is abbreviate | omitted.

  The chair 9 is pivotally supported by leg portions 132 on both sides sandwiching the back portion so that the back portion 131 is inclined. The shaft body 130 is provided near the center of the side surface of the back portion 131. By tilting the back portion 131 around the shaft body 130, the optimal inclination angle of the back portion can be adjusted according to the body shape and sitting posture of the person sitting in the chair. Further, the inclination of the back portion 131 is fixed in a state in which the inclination angle is adjusted by a fixing portion (not shown).

  Here, a state where the woman 133 is sitting on the chair will be described with reference to FIG. When the female 133 sits on the chair 9a, the upper side 131a of the back part 131 is inclined backward, and the lower side 131b of the back part protrudes forward, so that the inclination is adjusted so as to lightly support the bent waist part 134 of the female 133. Has been. By adjusting the inclination angle of the back portion 131 in this way, the waist portion 134 of the woman 133 is lightly supported by the back portion 131, and the chair is optimally comfortable.

Next, a state where the male 135 is sitting on the chair 9b will be described with reference to FIG. When the male 135 sits on the chair 9b, the upper side 131a of the back part 131 is inclined backward, and the lower side of the back part protrudes forward, so that the inclination is adjusted so as to support the entire back 136. By adjusting the inclination angle of the back portion 131 in this way, the entire back 136 of the male 135 is uniformly supported by the back portion 131, and the chair is optimally comfortable.
(Other)

In the present invention, four chairs with independent legs have been described as examples. However, the present invention is not limited to this, and the shape and material of the seat are not limited.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The technical scope of the present invention is not limited to the above description, but is indicated by the scope of the utility model registration request, and is intended to include all modifications within the meaning and scope equivalent to the scope of the utility model registration request. The

1, 2, 3, 4, 5, 6, 7, 8, 9, 9a, 9b ... chairs,
10, 11, 12, 13, 14 ... seat, 15 ... bottom,
16 ... bulge part, 17 ... floor surface,
20 ... receiving part, 21 ... girder member, 22, 23 ... leg connecting member, 24 ... diagonally reinforcing member,
30 ... Double-sided fastener, 40 ... Back part, 41 ... Back removal, 50, 51 ... Leg part, 52 ... Armrest,
60 ... Female, 70, 80, 90 ... Male,
61, 71, 81 ... lower limbs, 62, 72, 82, 92 ... upper limbs,
63, 73, 83, 93 ... buttocks,
100, 110 ... guide member, 101, 111 ... seat, 102, 112 ... girder member,
103 ... bottom part, 113 ... outer side surface, 104, 114 ... double-sided fastener, 115 ... seat leg part,
104a, 114a ... collar part, 104b, 114b ... ring part,
120: Locking tool, 121: Fastener, 122, 123 ... Belt, 124 ... Seat part, 125 ... Bottom part,
126 ... leg connecting member,
130 ... shaft body, 131 ... back part, 131a ... upper side of the back part, 131b ... lower side of the back part,
132 ... Legs, 133 ... Women, 134 ... Waist, 135 ... Men, 136 ... Back,
h1, h2, h3, h4 ... the height of the seating surface

Claims (7)

In a chair that is detachable and has a leg and a back,
The receiving portion of the seat includes a girder member that is spaced apart and arranged toward the front of the seat,
Double-sided fasteners with which the facing portions are engaged are arranged at respective facing positions of the bottom portion of the seat portion and the top portion of the girder member, and the seat portion is front and rear of the seat portion with respect to the receiving portion. It is supposed to be removable by selecting the position of the direction,
A chair characterized by that. At least one side portion of the receiving portion is provided with a guide member that is in contact with the side of the seat portion and guides the mounting position of the seat portion in the front-rear direction.
The chair according to claim 1. A guide member is provided on the bottom portion of the seat portion so as to be in contact with any side of the beam member and guide the mounting position of the seat portion in the front-rear direction.
The chair according to claim 1 or 2, characterized in that. The chair includes a locking tool that prevents the seat from coming off,
The locking tool locks the seat portion and the receiving portion,
The chair according to any one of claims 1 to 3, wherein the chair is characterized. The girder member includes a deformation preventing member in the horizontal plane direction only in the vicinity of the end portion thereof,
The chair according to any one of claims 1 to 4, wherein the chair is characterized. The back portion is tiltable;
The chair according to any one of claims 1 to 5, wherein the chair is characterized. In the chair set containing the said chair as described in any one of Claims 1 thru | or 6, and the several seat part of a different characteristic,
Each of the plurality of seats includes a double-sided fastener that is locked to the receiving part,
A chair set characterized by that.

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