JP2009072292A - Seat device and chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat device or the like capable of preventing and correcting potential strain and trouble of a body by promoting normal activities of the automatic nerve, simplifying a structure and reducing the weight of the structure by reducing the number of components, and securing a large space under a seat plate. <P>SOLUTION: This chair 10 has a seat device 1 mounted on leg bodies 2. The seat device 1 has a seat plate 11 and a support member 14 having a torsion spring stored in a tubular body is incorporated and retained inside a front/rear central part in the seating direction of the seat plate 11 extending over the width direction of the seat plate 11. The seat plate 11 is also served as a retainer of the support member 14. The seat plate 11 is retained on the leg bodies 2 to turn in the forward/backward direction in the seating direction with the support member 14 as an axial center. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sitting tool and a chair.

  In general, many chairs have a structure intended to sit comfortably. For example, in a chair with a backrest, the occupant tends to sit in a posture with his back against the backrest. In this case, the seated person tends to be in the posture of the back center of gravity. In this posture, for example, when heading to a desk, the back part is bent and the abdomen is compressed, and the head leaning forward is supported by the neck and shoulder muscles. Is likely to occur.

  In addition, it is known that the healthy functioning of the autonomic nerve is maintained by the balanced action of the sympathetic nerve and the parasympathetic nerve. However, if desk work is continued for a long time with the above-mentioned bend, the desk work requires the function of the sympathetic nerve despite the fact that fatigue overlaps and physically requires the function of the parasympathetic nerve. It becomes necessary to force the sympathetic nerves to be tense. As a result, an imbalance between the function of the sympathetic nerve and the function of the parasympathetic nerve is caused, which causes an increase in stress (sympathetic nerve overstress).

  In order to eliminate such inconvenience, the present inventor has proposed a sitting tool described in Patent Document 1. The seating tool is installed on the bottom surface of the chair and is supported by a fulcrum member provided on the lower surface of the seat plate so as to be rotatable, and an elastic member provided on the lower surface of one free end of the seat plate. Thus, the seat plate is elastically supported upward about the fulcrum member. With this seating tool, when desk work should be dominated by sympathetic nerves, the seated person sitting on the seat plate sits in the posture of the center of gravity before pressing the free end of one side of the seat plate against the elastic force of the elastic member This can facilitate the normal functioning of the sympathetic nerve.

  In recent years, the decline in physical function due to various other stresses and changes in lifestyle habits has been conspicuous, and this has become one of the factors, and various distortions and various disorders are becoming more likely to occur in the body. Yes. In order to prevent this, it has been eager to not only promote the normal activity of autonomic nerves but also to establish more effective and comprehensive prevention and correction methods for them.

  On the other hand, in order to eliminate the above inconveniences, treatment methods such as using medicine or regularly receiving procedures have been performed, but it takes time, money, and cost. Therefore, simpler preventive and corrective means are also required.

In view of this, the present inventor has proposed a sitting mechanism and a chair that can prevent and correct various distortions and various obstacles that can occur in the body more effectively, comprehensively, and simply. The seating mechanism described is further improved and the seating mechanism described in Patent Document 2 is proposed. This seating mechanism applies a force against the seat plate when a vertical force is applied to the seat plate that is provided so as to be movable in a substantially vertical direction around the support portion. Two control units are provided so as to sandwich the support unit.
Japanese Patent No. 3654765 International Publication WO2006 / 027822 Pamphlet

  The present inventor can promote normal activities of the autonomic nerve by using the above conventional sitting tool and the like, and can effectively and comprehensively prevent and correct various distortions and various obstacles that can occur in the body. In this respect, it was confirmed that the intended purpose of these seating tools could be achieved. Then, when this inventor performed further examination from another viewpoint, it discovered that those seating tools etc. had room for the further improvement from a viewpoint of productivity or usability.

  Specifically, in the sitting tool described in Patent Document 1, it is necessary to dispose the fulcrum member and the elastic member at the lower part of the seat plate, and to provide a structure for holding them below the back surface of the seat plate. The seating mechanism described in Document 2 requires a fulcrum part, two control parts arranged so as to sandwich the fulcrum part, and a structure for holding them again below the back surface of the seat plate. Therefore, in these seating tools and the like, it is desired to pursue a simpler structure and reduce the weight by reducing the number of parts. Further, when a chair is constructed by placing these sitting tools on the legs, as described above, it is necessary to provide a supporting member and a holding structure for the elastic body under the back surface of the seat plate. There is a tendency that it is difficult to secure a space, and depending on the structure, the sitting comfort of the seated person and the originally intended posture of the seated person may be hindered.

  Therefore, the present invention has been made in view of such circumstances, and promotes normal activity of the autonomic nerve, and effectively and comprehensively prevents and corrects various distortions and various obstacles that can occur in the body. It can be realized, and the number of parts can be reduced to simplify the structure and reduce the weight. In addition, the space below the seat plate can be secured to prevent the seating state of the seated person from being undesirably restricted. An object of the present invention is to provide a seating tool that can be used, and a chair using the same.

  In order to solve the above problems, a seating tool according to the present invention includes a support member provided on a holding body, and a seat plate provided so as to be freely movable in a substantially vertical direction with respect to the support member (relative to the support member). The support member applies a force against the force to the seat plate when a vertical force is applied to the front site in the seating direction of the seat plate, or the front member of the seat plate It is elastically supported substantially vertically upward.

  In the seating device configured as described above, the seat plate is provided so as to be movable around a support member provided on the holding body, so that a human (sitting person) sitting on the seating tool according to the lever principle. According to the load balance, the seat plate tilts as a “fulcrum” so to speak as a support member.

  For example, when this seating tool is installed at a suitable height level according to the height of the seated person and sits down, if the center line of gravity of the seated person hangs slightly behind the support member, the rear side part in the seating direction is pushed down. The seat plate is tilted as shown in FIG. On the other hand, if the toe (more precisely, the middle foot phalanx joint (MP) joint) is seated with the center of gravity shifted forward so that it touches the floor surface, the seat plate will be in a substantially horizontal state, and the heel will rest on the floor surface. If you move the femur so that it is in a position of a slight frontal center of gravity, the knee joint is lowered and the front side of the seat plate is pushed down. As a result, the seat plate is tilted forward, and the seated person is also tilted forward.

  When the posture is the front center of gravity, a vertically downward force (load of the seated person) acts on the front portion in the seating direction of the seat plate, and the support member applies the force to the front portion of the seat plate where the force acts. A force against the force is applied, and the front portion of the seat plate is elastically supported substantially vertically upward. Thereby, a force that returns the seat plate to the initial posture state (for example, a substantially horizontal state) acts on the entire seat plate.

  On the other hand, if the seat plate and the seated person try to maintain the forward tilted posture, the extension of the spinal column is maintained and the anti-gravity is maintained in order to counter the force from the support member that acts to return the seat plate. Many muscle groups of the body, including muscles, must continue to be strained simultaneously and appropriately. Therefore, the sitting person simply sits on the seating tool of the present invention so as to maintain such a forward leaning posture, and the posture of the muscle group included in the body does not collapse without causing the spine to bend forward or sit down. Vulnerability is prevented in a complex and effective manner.

  In addition, the support member not only functions as a fulcrum, but also operates as a control mechanism that elastically holds a force applied to the front part of the seat plate against the load of the seated person as described above. For example, since the elastic member provided separately from the supporting member provided in the sitting tool described in Patent Documents 1 and 2 is not necessary, the number of parts is reduced, and the parts on the back surface of the seat plate are reduced accordingly. Arrangement space is also reduced.

  Further, the type of the support member is not particularly limited, but specifically, for example, it is preferable to have a torsion bar spring (torsion bar spring) type elastic body. In this case, the support member can be further simplified, reduced in size, and reduced in weight as compared with the case where a coil spring type elastic body is used. In addition, by appropriately selecting and using torsion bar springs having different elastic strengths, the holding force of the seat plate and the drag force on the seat plate can be easily adjusted.

  In this case, the support member is provided so that, for example, a torsion bar spring-type elastic body extends in the left-right direction with respect to the seated person so as to extend over the width direction of the seat plate. It is useful to be a thing. In this way, the extension shaft of the support member becomes the fulcrum shaft, and when the seated person sits down on the seating tool with the posture of the front center of gravity, the torsion is caused by the load of the seated person applied to the front part in the seating direction of the seat plate. The bar spring type elastic body is twisted, and the force against the load is applied to the front portion of the seat plate by the restoring force. As a result, the front portion of the seat plate is elastically supported substantially vertically upward. And since the support member is provided so as to extend over the width direction of the seat plate, the seat plate is uniformly held throughout the width direction, in other words, for the seat plate and the seated person, It is suppressed that local force acts, and it becomes easy to maintain the forward tilt posture of the seated person.

  Further, it is preferable that the support member is provided at a rear portion in the seating direction of the seat plate, more preferably at the rear end. In this way, since the support member is not arranged below the central portion of the back surface of the seat plate, it is possible to secure a wider space area below the seat plate.

  Furthermore, when the support member has a torsion bar spring type elastic body, it is more preferable that the seat plate also serves as a holding body for holding the support member. The torsion bar spring type elastic body generates a drag (repulsive force, restoring force) in the direction opposite to the twist direction due to its torsion. Therefore, when the support member is incorporated and held in the seat plate itself to which the load of the seated person is applied, a drag force opposite to the direction in which the load is applied acts on the seat plate. It is supported elastically upward substantially vertically. In this case, it is not necessary to provide the holding body separately from the seat plate, so that it is possible to further reduce the space area and the number of parts for separately installing the holding body.

  Furthermore, the support member is positioned in the lower part of the front part in the seating direction of the seat plate and below the rear part in the seating direction of the seat plate instead of or in addition to the aforementioned torsion bar spring type elastic body. It is also preferable to have an elastic body connected to a part of the holding body and / or a cylinder device. Here, examples of the elastic body include various springs and rubbers, and examples of the cylinder device include a cylindrical atmospheric pressure or a hydraulic cylinder or a damper. Even in this case, since the support member also serves as a control mechanism for elastically supporting the supporting point of the tilting seat plate and the seat plate, the number of parts is reduced as compared with the prior art, and the parts on the back surface of the seat plate are correspondingly reduced. The arrangement space is reduced.

  In addition, a torsion bar spring type elastic body provided in the rear part of the seat plate, a lower part of the front part in the seating direction of the seat plate, and a part of the holding body located below the rear part in the seating direction of the seat plate When the support member is configured by combining the elastic body and / or the cylinder device connected to each other, the holding force of the seat plate and the drag force applied to the seat plate can be increased, and the dynamic range (adjustment) can be increased. It can be made larger, and further therapeutic effects can be realized.

  Furthermore, it is more preferable that the support member is provided so that the position in the seating direction can be adjusted. This makes it possible to arbitrarily adjust the relative positional relationship between the position of the center of gravity in the seated state and the support member functioning as a fulcrum according to the body shape of the seated person. As described above, the fulcrum member is more preferably provided at the rear portion of the seat plate.

  Moreover, the chair by this invention is provided with the seating tool of this invention, and functions effectively, and is provided with the seating tool by this invention mentioned above, and the leg body in which it was installed.

  According to the present invention, the support member provided on the holding body has a vertical direction at a front portion in the seating direction of the seat plate provided so as to be freely movable in the substantially vertical direction with respect to the support member (relative to the support member). When a force is applied, a force against the force is applied to the seat plate, or the front part of the seat plate is elastically supported substantially vertically upward, so that normal activity of the autonomic nerve is Promotes and can effectively and comprehensively prevent and correct various distortions and various obstacles that can occur in the body, reduce the number of parts, simplify the structure and reduce the weight, and Therefore, it is possible to prevent the seating state of the seated person from being undesirably restricted by securing a larger space below the seat plate.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios. Further, the following embodiments are exemplifications for explaining the present invention, and are not intended to limit the present invention only to the embodiments. Further, the present invention can be variously modified without departing from the gist thereof.

  FIG. 1 is a perspective view schematically showing a preferred embodiment of a sitting tool and a chair including the sitting tool according to the present invention. The chair 10 is one in which the sitting tool 1 is installed on a leg 2 of four legs. The sitting tool 1 includes a seat plate 11 formed of a substantially rectangular plate-like member, and the entire seat plate 11 is covered with an appropriate cover member 12. Further, a support member 14 in which a torsion bar spring (a torsion bar spring type elastic body) is accommodated in a cylindrical body is disposed in the center portion of the seat plate 11 before and after the seating direction. It is incorporated and held so as to extend over the left and right direction in the seating direction. Thus, the seat plate 11 also serves as a holding body for the support member 14. Further, although details are omitted in the drawing, the seat plate 11 is legged so as to rotate back and forth in the seating direction with the support member 14 as the axis center, and so that its movable range is restricted to an appropriate range. It is held on the body 2.

  Further, when the torsion bar spring is twisted in the direction indicated by the arrow S, the support member 14 generates a restoring force that twists in the direction opposite to the twisted direction, and the seat plate 11 is also rotated in the direction indicated by the arrow S. As a result, the front part and the rear part in the seating direction of the seat plate 11 are moved substantially vertically. Further, on the upper surface of the front end portion of the seat plate 11 in the seating direction, a convex member 16 having a substantially trapezoidal cross-section that protrudes gently extends so as to extend in the width direction of the seat plate 11. ing.

  The operation of the seating tool 1 configured as described above and the chair including the seating tool 1 will be described in detail below with reference to FIG. FIG. 2 is a side view (partially cross-sectional view) schematically showing a state where a person is seated on another preferred embodiment of the sitting tool and the chair including the same according to the present invention. The chair 100 is configured in the same manner as the chair 10 except that an appropriate cushion material 8 is attached to the upper surface of the seat plate 11 of the sitting tool 1.

  It is preferable to select the chair 100 whose leg length is adjusted so as to match the height of the seated person H. Specifically, the chair 100 stands up in front of the chair 100 and the height of the seat plate 11 is that of the seated person H. It is preferable that the leg length is adjusted so as to be, for example, about 3 to 10 cm higher than the popliteal (the part having the heel on the back of the knee). Further, as will be described later, it is desirable that the seat plate 11 is set so that the toes (MP joints) are in contact with the floor surface when the seat plate 11 is seated and in a substantially horizontal state.

  Further, as described above, the support member 14 that functions as a fulcrum for tilting the seat plate 11 is disposed at the approximate center in the front-rear direction of the seat plate 11, but more preferably, the greater trochanter (thigh of the seated person H). It is preferable to use a seat plate 11 whose position is adjusted so that the support member 14 is positioned in the vicinity of the uppermost bone end).

  When a seated person H sits on such a chair 100, normally, when the center line of gravity of the seated person H hangs backward from the support member 14, the seat plate 11 tilts backward, but the torsion bar spring of the support member 14 However, by twisting in the direction of the arrow Xs shown in the figure, a restoring force in the opposite direction is generated, and this force is applied to the seat plate 11 as a resistance against the backward tilt of the seat plate 11. As a result, the rear end portion of the seat plate 11 is pushed back substantially vertically upward. As a result, the seat surface, that is, the femur of the seated person H is kept substantially horizontal, and the toes (MP joints) are in contact with the floor surface. As described above, the posture is also maintained by the seat plate 11 being held on the leg 2 so as to be regulated within an appropriate movable range. This posture can be said to be a relatively comfortable sitting state with the pelvis slightly tilted backward.

  In this posture, generally, about one third of the total length of the femur from the distal end of the femur contacts the convex member 16. Then, when the femur is moved so that the heel is attached to the floor surface from this state, the knee joint located at the distal end of the femur is lowered, and the convex member 16 becomes the “action point” of the vertically downward force. The front end of the seat plate 11 is pushed down. At the same time, the convex member 16 becomes a “fulcrum” for the movement of the femur, and the hip joint located at the proximal end of the femur moves upward. These movements extend the hip joint anatomically. Further, the extension of the hip joint moderately tensions the extensor and flexor groups of the lower leg and causes contraction of the gluteal and hamstring muscles in the hip joint. Furthermore, in order to fix the joint, the iliopsoas muscle, which is one of the flexor muscle groups, also contracts.

  When the seat plate 11 is tilted forward in this manner, the center of gravity of the seated person H moves forward, and the pelvis tilts forward from the beginning when the seat plate 11 is in a substantially horizontal state, and the spinal column extends to sit down. The person H is seated in a slightly leaning posture. In addition, if the seated person H gets used to sitting on the chair 10, it can take such a forward leaning posture from the initial sitting state.

  Here, in the state in which the seat plate 11 is tilted forward, the torsion bar spring of the support member 14 is twisted in the direction opposite to the illustrated arrow Xs direction, contrary to the backward tilted direction, whereby the arrow is reversed. A restoring force in the Xs direction is generated, and this force is applied to the seat plate 11 as a resistance against the forward tilt of the seat plate 11. Thereby, the seat plate 11 is pushed up to a position where the load of the seated person H and the repulsive force of the torsion bar spring of the support member 14 can be balanced so as to return to the horizontal state.

  As described above, when a downward force is applied to the front portion of the seat plate 11 in the seating direction by the load of the seated person H, the force against the force, that is, the repulsive force of the support member 14 against torsion, The front end of the plate 11 is pushed up, in other words, the support member 14 elastically supports the front portion of the seat plate 11 substantially vertically upward, so that the seated person H maintains its forward tilt posture. It is necessary to strain the muscles necessary for the exercise.

  More specifically, the force in the direction indicated by the arrow Xs against the twisting of the support member 14 causes the seat plate 11 to be restored in the horizontal direction. If this happens, the seat plate 11 is easily restored to the initial horizontal state. In this case, the pelvis is tilted backward and the original comfortable seating state is obtained.

  Therefore, in order to maintain the above-mentioned forward leaning posture of the seat plate 11 and the seated person H, the muscle tension of the lower leg extensors and flexor muscles (triceps surae) is moderately and continuously maintained intermittently. There is a need. On the other hand, if such muscle tone is maintained, the weakness of the muscular strength can be prevented, and venous blood / lymph recirculation is promoted by the muscle pump action, which prevents the lower leg edema and tightens the ankle. can get.

  Further, in order to maintain the forward tilting posture of the seat plate 11 and the seated person H, the hip joint can easily come into contact with the convex portion at the intermediate rotation / external rotation positions. The internal rotator muscle group and the external rotator muscle group including the piriform muscle, and the extensor and flexor muscles of the hip joint need to be moderately tensioned. Conversely, if such muscle tone is maintained, the development of their muscular strength can be promoted, and as a result, a disorder that can occur in the hip joint can be effectively prevented.

  Furthermore, by maintaining the forward tilting posture of the seat plate 11 and the seated person H, the femur and tibia are restored to the physiologically proper state (physiological line) inherently possessed by the human. The effect of correcting knee valgus (X leg) and varus (O leg) is also achieved.

  Furthermore, in order to maintain the anteversion posture of the seat plate 11 and the seated person H, the hamstring muscle (the biceps femoris muscle, the semi-healthy meningiform muscle that is a muscle that extends the hip joint and starts at the sciatic nodule) ) Tension must be maintained moderately and continuously or intermittently. Conversely, if such muscle tension is maintained, moderate tension of the quadriceps muscle, which is the flexor of the hip joint, is also caused. Thereby, muscle atrophy of the thigh can be suppressed, and as a result, it is possible to prevent a decrease in muscle strength of the anti-gravity muscle of the thigh.

  Furthermore, by holding the seat board 11 and the seated person H leaning forward while sitting on the chair 100, it becomes difficult to assemble legs or take other unnatural leg positions, Body distortion can be prevented, and distortion occurring in the body can be corrected.

  Further, if the seat board 11 and the seated person H are kept in the forward tilted posture, the gluteal muscles of the hip joint extensors group, the gluteal muscles involved in abduction, and the gluteal muscles involved in internal rotation and abduction in the pelvis. Moderate muscle tone is also maintained continuously or intermittently. In this way, the atrophy of these muscles is suppressed, and weakening of the muscular strength can be prevented. In addition, from a cosmetic point of view, a so-called hip-up effect is achieved. Moreover, since not only the tension of the gluteus medius, the gluteus medius, and the gluteus medius, but also the tension of the pelvic floor muscles, even if the seated person H suffers from hemorrhoids, hemorrhoids, etc., they are Direct pressure from the seat can be avoided.

  Furthermore, when trying to maintain the forward leaning posture of the seat plate 11 and the seated person H, the standing muscle group of the rear trunk, the abdominal muscle group of the trunk trunk, and the iliopsoas muscle group running from the spine to the lesser trochanter The muscles coordinated with each other keep the iliac slightly tilted and the spine extends like a natural standing posture. Accordingly, it is possible to prevent the muscular strength of the iliopsoas muscle, which is one of the important muscles among the antigravity muscles, from being reduced. As a result, it is possible to prevent back pain caused by lumbar kyphosis, forehead, scoliosis and the like. Further, in the middle age and the old age, it is possible to effectively suppress bedridden symptoms by preventing such weakening of the anti-gravity muscle.

  In addition, when a physiologically appropriate state (physiological line) of the spinal column is generated in this way, an action that prevents the dorsum of the spine and facilitates breathing exercises occurs in the chest. In addition, since unnatural shoulder tension and neck forward / backward bending are suppressed, stiff shoulders and neck stiffness can be prevented. Furthermore, the posture in which the physiological line is formed can prevent unnecessary near-point adjustment of the eye, thereby contributing to prevention of pseudomyopia and eye strain. Furthermore, from a cosmetic point of view, a bust-up effect can be obtained. Furthermore, moderate tension in the abdominal muscles can contribute to the prevention of the occurrence of disorders such as visceral sag due to muscle weakness, and from the cosmetic point of view, the effect of tightening the waist can also be obtained.

  Therefore, according to the seating tool 1 and the chairs 10 and 100 including the seating tool, various effects as described above can be produced in combination, so that various distortions and various obstacles that can occur in the body are effectively prevented. Moreover, it is possible to prevent and correct comprehensively and simply.

  In addition, the support member 14 not only functions as a fulcrum, but also operates as a control mechanism that elastically holds the seat plate 11 by applying force to the front portion of the seat plate 11 against the load of the seated person H. The elastic member provided separately from the support member provided in the sitting tool described in Patent Documents 1 and 2 is not necessary. Therefore, the number of parts can be reduced, and the arrangement space for the parts on the back surface of the seat plate 11 can be reduced accordingly. As a result, the structure of the seating tool 1 and the chairs 10 and 100 can be simplified and reduced in weight, and more space can be secured under the seat plate 11, so that the sitting posture of the seated person H is inconvenient. It is possible to prevent the restriction.

  Further, since the torsion bar spring type elastic body is used as the support member 14, for example, the support member 14 can be further simplified, reduced in size, and reduced in weight as compared with the case where a coil spring type elastic body is used. Can be planned. Furthermore, by appropriately selecting and providing torsion bar springs having different elastic strengths, the holding force of the seat plate 11 and the drag force on the seat plate 11 can be easily adjusted, and the load on the seated person H is different. It is possible. In this case, although the support member 14 is incorporated in the seat plate 11, the support member 14 has a simple rod shape as shown in the figure, so that the replacement work is simple and the handling is also easy.

  FIG. 3 is a perspective view schematically showing another embodiment of the sitting tool and the chair including the same according to the present invention. The chair 20 is replaced with the seating tool 1, except that the support member 14 adopting a torsion bar spring includes the seating tool 3 fixed to the center of the back surface (lower surface) of the seat plate 11 by the gripping tool 13. It is comprised similarly to the chair 10 shown in FIG.

  FIG. 4 is a side view (partially cross-sectional view) schematically showing a state in which a person is seated on yet another embodiment of the sitting tool and the chair provided therewith according to the present invention. The chair 200 is configured in the same manner as the chair 20 except that an appropriate cushion material 8 is attached to the upper surface of the seat plate 11 of the sitting tool 3.

  In the seating tool 3 and the chairs 20 and 200 configured as described above, in addition to the same operational effects as the seating tool 1 and the chairs 10 and 100 described above, the support member 14 is provided with the seat plate 11. Since it is provided outside, the replacement work can be simplified.

  FIG. 5: is a perspective view which shows typically other embodiment of the sitting tool by this invention, and a chair provided with the same. The chair 30 is configured such that the seating tool 4 is installed on the four legs 5. The seating tool 4 includes a seat plate 11 formed of a substantially rectangular plate-like member, and the entire seat plate 11 is covered with an appropriate cover member 12. Further, a support member 14 in which a torsion bar spring is accommodated in a cylindrical body extends across the width direction of the seat plate 11 (left and right direction in the seating direction) at the rear end portion in the seating direction of the seat plate 11. Thus, it is incorporated and held inside the seat plate 11. Thus, in the chair 30 as well as the chairs 10 and 20, the seat plate 11 also serves as a holding member for the support member 14.

  One end of a support member 15 having a substantially rod-shaped cylinder mechanism (damper) is connected to the center of the back surface of the front portion in the seating direction of the seat plate 11, and between the two rear legs of the leg 5. The other end of the support member 15 is connected to the front center portion of the bridge plate 21 (holding body) that is laid. Thus, the support member 15 is installed obliquely (with an angle) with respect to the horizontal direction. With this connection structure, the support member 15 is coupled to the seat plate 11 and the leg body 5. Examples of the cylinder device of the support member 15 include a hydraulic cylinder such as a hydraulic pressure, a pneumatic cylinder such as a pneumatic pressure, and the like.

  Although not shown in detail in the drawing, the seat plate 11 is legged so as to rotate back and forth in the seating direction with the support member 14 as an axis center, and so that its movable range is restricted to an appropriate range. It is held on the body 5. Similarly to the chairs 10, 20, 100, and 200, a convex member 16 having a substantially trapezoidal cross section that gently rises is formed on the upper surface of the front end portion of the seat plate 11 in the seating direction. It protrudes so as to extend in the direction.

  In the chair 30 having such a configuration, when the torsion bar spring of the support member 14 is twisted in the direction of the arrow S in the figure, a restoring force that twists in the opposite direction to the twist direction is generated. As a result, the front part and the rear part in the seating direction of the seat plate 11 are pushed up substantially vertically. Further, when the support member 15 expands and contracts in the direction indicated by the arrow R, a restoring force that contracts and expands in the direction opposite to the expansion and contraction direction is generated, whereby the support member 15 expands and contracts obliquely with respect to the horizontal direction. The front end of the seat plate 11 is pushed upward or pulled downward. As a result, even by the repulsive force from the support member 15, the seat plate 11 is rotated in the illustrated arrow S direction with the support member 14 as a fulcrum, and the front portion and the rear portion of the seat plate 11 move along the substantially vertical direction. Is promoted.

  FIG. 6 is a side view (partially cross-sectional view) schematically showing a state in which a person is seated on still another preferred embodiment of the sitting tool and the chair including the same according to the present invention. The chair 300 is configured in the same manner as the chair 30 except that an appropriate cushion material 8 is attached to the upper surface of the seat plate 11 of the sitting tool 4.

  According to the seating tool 4 and the chairs 30 and 300 configured as described above, the same kind of effects as the seating tool 1 and the chairs 10 and 100 described above are achieved, and the seat plate 11 is tilted forward. As shown in FIG. 6, in addition to the drag force acting on the support member 14 in the arrow Xs direction, the drag force acting on the support member 15 in the arrow Xr direction acts, whereby the front end of the seat plate 11 is further lifted substantially vertically upward. It is done. As a result, the seat plate 11 operates to return more in the horizontal state than by the repulsive force of only the support member 14.

  Therefore, even if the seated person H can maintain the forward leaning posture to some extent by its own load only by the repulsive force of the support member 14, the front end portion of the seat plate 11 is further moved by the repulsive force of the support member 15. Since it is pushed up, the seated person H needs to further strain the muscles necessary to maintain the forward leaning posture. In other words, the repulsive force of both the support members 14 and 15 causes an operation in which the seat plate 11 is strongly restored in the horizontal direction. Therefore, if the muscles of the whole body are relaxed together with the lower limbs, the seat plate 11 is simplified. The initial horizontal state will be restored. In this case, the pelvis is tilted backward and the original comfortable seating state is obtained.

  Therefore, in order to hold the seat plate 11 forward and to maintain the above-mentioned forward leaning posture of the seated person H, it is necessary to maintain the muscle tension of the lower leg extensors and flexors (triceps surae) more strongly, By maintaining such muscle tone, it is possible to further promote normal activities of the autonomic nerves, and to more effectively and comprehensively prevent and correct various distortions and various disorders that can occur in the body. Further beauty effects can be expected.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible in the limit which does not change the summary. For example, the seat plate 11 may be a solid plate member or a hollow plate member, and the shape thereof may be curved instead of a flat plate, and is not limited to a rectangular plate, and may be circular. The leg body 2 may be provided with a single leg at the center of the lower surface of the seat plate 11. In this case, for example, a leg holder is fixed to the lower part of the support member 14 and has a telescopic rod and a hydraulic cylinder. Legs may be provided, and the height of the seat plate 11 may be adjusted by driving the telescopic rod by a hydraulic cylinder.

  Further, the support members 14 and 15 push the front end of the seat plate 11 substantially vertically upward in advance, that is, when the seated person H is not seated on the seat plate 11 and no load is applied. A force in the direction of the arrow Xs shown in the figure is applied to the torsion bar spring of the support member 14, and a force in the direction of the arrow Xr in the figure is applied to the cylinder device of the support member 15, so that the seat plate 11 is biased vertically upward in advance. You may be made to do. If it carries out like this, compared with the case where the seat board 11 is not urged | biased like that, the equivalent muscular load can be given to the seating person H by the displacement of the seat board 11 few. In this case, since the operations of the seat plate 11 and the support members 14 and 15 are reduced, durability when repeatedly used can be improved.

  Furthermore, instead of the support member 15, another elastic body such as a spring or rubber may be used. Furthermore, in the chairs 30 and 300, only one of the support member 14 and the support member 15 may apply a drag force to the front end portion of the seat plate 11. In addition, in the chairs 30 and 300, the support member 14 may be fixed to the back surface of the seat plate 11 similarly to the chairs 20 and 200 without being incorporated in the seat plate 11.

  The chair may not have a backrest, a handrail, an armrest or the like. Furthermore, the convex member 16 may not be provided, but is preferably provided, and may not be integrally extended. For example, the convex member 16 is divided into two positions at which the left and right thighs abut. May be. Further, the installation position of the support member 14 is not limited to the center part and the rear end part of the seat plate 11, and the installation position may be appropriately adjusted in advance according to the body shape and demand of the seated person H, and the support members 14, 15. It is also possible to provide a drive mechanism and adjust the position of the seated person H to the seat holding position.

  In the seating tool according to the present invention and the chair provided with the seating tool, the vertical force is applied to the front portion in the seating direction of the seat plate provided so as to be movable in the substantially vertical direction with respect to the support member (relative to the support member). Sometimes, a force against the force is applied to the seat plate, or the front part of the seat plate is elastically supported almost vertically upward, and this configuration promotes the normal activity of the autonomic nerve In addition, it is possible to effectively and comprehensively prevent and correct various distortions and various obstacles that can occur in the body, and it is possible to simplify the structure and reduce the weight by reducing the number of parts, and Since it is possible to prevent the seating state of the seated person from being undesirably restricted by securing a larger space below the seat plate, it can be widely used for body treatment and beauty.

1 is a perspective view schematically showing a preferred embodiment of a seating tool according to the present invention and a chair including the sitting tool. It is a side view (partial sectional view) which shows typically the state where a person sat down on other suitable one embodiment of the sitting tool by this invention, and a chair provided with it. It is a perspective view which shows typically other embodiment of the sitting tool by this invention, and a chair provided with the same. It is a side view (partial sectional view) showing typically the state where a person sat down on other embodiments of the sitting tool by the present invention and the chair provided with it. It is a perspective view which shows typically other embodiment of the sitting tool by this invention, and a chair provided with the same. It is a side view (partial sectional view) which shows typically the state where a person sat down on other suitable embodiments of the sitting tool by the present invention, and a chair provided with it.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 3, 4 ... Seating tool, 2, 5 ... Leg, 8 ... Cushioning material 10, 20, 100, 200, 30, 300 ... Chair, 11 ... Seat plate, 12 ... Cover member, 13 ... Gripping tool, 14, 15 ... support member, 16 ... convex member, 21 ... transition board (holding body), H ... seated person.

Claims (9)

A support member provided on the holding body;
A seat plate provided so as to be freely movable in a substantially vertical direction around the support member;
With
The support member applies a force against the force to the seat plate when a vertically downward force is applied to a front portion in the seating direction of the seat plate.
Seating tool. A support member provided on the holding body;
A seat plate provided so as to be movable in a substantially vertical direction with respect to the support member;
With
The support member elastically supports the front part substantially vertically upward when a force in the vertical direction acts on the front part in the seating direction of the seat plate.
Seating tool. The support member has a torsion bar spring type elastic body.
The sitting tool according to claim 1 or 2. The support member is provided so as to extend over the width direction of the seat plate.
The sitting tool according to claim 3. The support member is provided at a rear portion in the seating direction of the seat plate.
The sitting tool according to claim 3 or 4. The seat plate also serves as the holding body.
The sitting tool of any one of Claims 3-5. The support member is an elastic body connected to a lower portion of a front portion in the seating direction of the seat plate and a part of the holding body located below a rear portion in the seating direction of the seat plate, and / or , Having a cylinder device,
The sitting tool of any one of Claims 1-5. The support member is provided such that the position in the seating direction is adjustable.
The sitting tool of any one of Claims 1-6. The sitting tool according to any one of claims 1 to 8,
A leg on which the sitting tool is installed;
Chair with.

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