JP4979042B2 - Chair - Google Patents

Description

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

  With the advent of an aging society, it has become important to improve the quality of life of the elderly and caregivers, and improving the quality of life from the perspective of feeding the elderly is an important issue. It is coming. The basics of feeding and dietary care for elderly people who are declining or declining in trunk function, swallowing function, respiratory function, immune function, etc. are “smooth swallowing without wasting physical strength and without aspiration How can we get enough calories and nutrients in a single meal in a smooth and short time? Thus, conventionally, a dining chair called “for elderly facilities” has appeared.

Mie Mukai, Eating and swallowing dysfunction and rehabilitation in the elderly. Perspective of dental world, 91 (2), 1998, p.309-318 Taichi Eiichi, “Evaluation methods and training of dysphagia in elderly people and practice of dental practice. Perspective of dental world”, 91 (3), 1998, p.649-656

  However, the above-mentioned conventional dining chair only emphasizes the feeling of stability when standing and sitting due to consideration of the seat surface, dirt on the backrest, the shape of the armrest, position, etc., reducing fatigue during eating, The original purpose and function as a dedicated chair for elderly people to achieve smooth swallowing and avoid aspiration as much as possible were missing.

  Then, an object of this invention is to provide the chair with the original function as a chair for eating.

In order to achieve the above object, a chair according to the present invention comprises a backrest and a seating surface, and is composed of a single layer or a plurality of layers for pressing the left and right posterior iliac spines and the upper sacrum when a user is sitting. The backrest has a member;
In the backrest, at least one other elastic member composed of a single layer or a plurality of layers is arranged below the elastic member in a direction toward the seat surface, and the elastic member and at least one other elastic member are arranged. The elastic modulus decreases toward the bottom, and at least one plane including the backrest surfaces of the elastic member and at least one other elastic member forms an angle of approximately 100 degrees with respect to the upper surface of the seat surface. It was configured as follows.

  According to such a configuration, as a chair for eating, the user can move the trunk forward with high efficiency by pressing the left and right posterior iliac spines and the upper sacrum against the elastic member when sitting. , Physical fatigue during eating is reduced and ease of eating is improved. Furthermore, the forward leaning posture with the natural curvature of the trunk can be stably maintained, and smooth swallowing can be realized. In addition, the stable maintenance of the posture prevents a neck extension posture that easily causes aspiration, and avoids aspiration as much as possible.

  In the above configuration, the elastic member may be an elastic member for pressing the lumbar part from the fifth lumbar part to the second lumbar part in addition to the left and right posterior iliac spine parts and the upper sacral part. .

  According to such a configuration, the user presses the left and right posterior iliac spines, the upper sacrum, and the lumbar vertebra from the fifth lumbar vertebra to the second lumbar vertebra at the time of sitting, so that a highly efficient trunk Can be moved forward, reducing physical fatigue during eating and improving ease of eating.

  In any one of the above configurations, the at least one other elastic member may be one or three or more.

  In any of the above-described configurations, the backrest height may be set to the second lumbar portion when the user is sitting.

  According to such a configuration, the user does not try to support the trunk around the seventh to tenth thoracic vertebrae, and inefficient trunk movement can be prevented. Also, it does not interfere with upper limb movements repeated during eating.

  In any one of the configurations described above, a restriction unit that restricts rearward movement of the scapula portion when the user is sitting may be provided above the elastic member.

  According to such a configuration, the rearward movement of the user's trunk can be restricted, and the neck extension posture that easily causes aspiration can be reliably prevented.

  In any of the above-described configurations, the seat surface may include a seat surface portion that supports a user, and a gap may be provided below the elastic member so that the seat surface portion can be visually recognized from the rear. .

  According to such a structure, it becomes easy to clean the seat surface part which is easy to get dirty.

  According to the chair concerning the present invention, it can be set as the chair which has the original function as a chair for eating.

It is a figure which shows the location used as the axis point and base point at the time of trunk movement of the elderly at the time of eating. It is a figure which shows the attitude | position at the time of eating which can implement | achieve smooth swallowing and can avoid aspiration as much as possible. It is a figure which shows the limit posture for avoiding aspiration as much as possible. 1 is an overall perspective view of a chair according to the present invention. (A) It is a figure which shows the 1st modification of the backrest structure of the chair which concerns on this invention, (b) The 2nd modification of the backrest structure of the chair which concerns on this invention. It is a figure which shows the 3rd modification of the backrest structure of the chair which concerns on this invention. (A) The Example using the modification of the chair concerning the present invention which added the armrest, (b) It is a figure showing the example which added the table to the chair concerning the present invention. It is a figure which shows the modification of the chair which concerns on this invention which added the cushion part which prevents the cervical extension posture for the purpose of aspiration avoidance for the elderly people who require a meal which is easy to cause aspiration. (A) The side view of the chair mounting tool which concerns on this invention, (b) It is a figure which shows the state which mounted | wore the chair mounting tool which concerns on this invention. (A) The side view of the chair mounting tool which concerns on another embodiment of this invention, (b) It is a figure which shows the state which mounted | wore the chair mounting tool which concerns on another embodiment of this invention.

  In completing the present invention, the inventor conducted a scrutiny on the posture that is easy for an elderly person to eat at the time of eating, a scrutiny on a posture that the elderly person can easily swallow, and a scrutiny on how the elderly person changed their posture during feeding, Then, a close examination was conducted on the posture to avoid aspiration of the elderly as much as possible.

  As a result of the above examination, in smooth eating, an elderly person has the left posterior iliac spine b, the upper sacrum c and the fifth lumbar vertebra d in FIG. The knowledge that the trunk was smoothly moved forward by pressing the lumbar part up to g against the backrest was obtained. In addition, when the trunk moves forward, the weaker the person who supports the spinal column, the upper part of the second lumbar vertebra is pressed against the backrest more strongly than the other part. There was a tendency to press the left and right posterior iliac spines and the upper sacrum more strongly against the backrest than other parts. Thereby, the structure of the seat surface and the backrest for implement | achieving the efficient trunk movement used as the basis of smooth eating is calculated | required.

  In addition, as a result of the above examination, the sitting posture unique to the elderly that is easy to eat at the time of eating and that can be smoothly swallowed sits deeply on the backrest, and both soles are firmly in the state of lumbar spine 100 degrees (pelvic upright) The hip joint, knee joint, and ankle joint are in a sitting position close to 90 degrees while touching the floor, and the trunk is a natural body that does not oppose the weight of the cranium with the upper lumbar vertebra as the bend starting part. A forward leaning posture was formed, and the head and neck formed a natural forward leaning posture with the trunk leaning forward (not a neck flexion posture) (see FIG. 2). Thereby, the structure of the backrest for maintaining stably the forward leaning posture with such a natural curvature which implement | achieves smooth swallowing is calculated | required.

  In addition, as a result of the above examination, the posture in which the posterior end j of the occipital bone is on a straight line drawn vertically from the sciatica i in the sitting posture facing straight side shown in FIG. 3 is to avoid aspiration as much as possible. It is a limit posture, and if the posterior end of the occipital bone is positioned forward from this limit, aspiration is avoided as much as possible. Conversely, if the posterior end of the occipital bone is positioned backward from this limit, the cervical extension position is easily generated. The knowledge that it is easy to cause aspiration was obtained. Thus, in order to avoid aspiration (including inapparent aspiration) as much as possible, the anteversion posture (Fig. 2) with the natural curvature is stable during feeding and for a while after feeding. A backrest configuration that can be maintained is required.

  In addition, as a result of the above examination, when eating elderly people with high backrest, there is a strong tendency to support the trunk around the 7th to 10th thoracic vertebrae. Fore-and-aft movement puts a very large load on the abdominal muscles and moves the trunk forward by pressing the 7th to 10th thoracic vertebrae against the backrest, or until the first lumbar area is first pressed against the backrest And finally moving the trunk forward by pressing the area around the third lumbar vertebra against the backrest. From this result, it is required to set an appropriate backrest height for the high efficiency of trunk movement during feeding by the elderly.

  Based on the above examination results, the inventors completed a chair according to the present invention described below. FIG. 4 shows an overall perspective view of the chair according to the present invention.

  As shown in FIG. 4, the chair 100 according to the present invention includes a frame 1, a seat surface portion support portion 2, a first seat surface portion 3, a second seat surface portion 4, a third seat surface portion 5, and a first back. The backrest portion 6, the second backrest portion 7, the third backrest portion 8, and the backrest support portion 9 are provided.

  The frame 1 is made of wood, and includes four leg frame portions 1a, a seat frame portion 1b provided above them, and a backrest frame portion 1c provided above them.

  The seat surface A provided in the chair 100 according to the present invention includes a seat surface frame portion 1b, a seat surface portion support portion 2, a first seat surface portion 3, a second seat surface portion 4, and a third seat surface portion 5. . The seat surface portion support portion 2 which is a plywood is bonded to the seat surface frame portion 1b with a double-sided tape. Moreover, the 1st seat surface part 3, the 2nd seat surface part 4, and the 3rd seat surface part 5 are each adhere | attached on the seat surface part support part 2 with a double-sided tape.

  The first seat surface portion 3 supports the thigh when the user is sitting, and has a three-layer structure of a lower layer portion 3a, a middle layer portion 3b, and an upper layer portion 3c. The lower layer part 3a is made of foamed polyethylene having a foaming ratio of 15 times (hereinafter, foamed polyethylene 15 times), the middle layer part 3b is made of foamed polyethylene having a foaming ratio of 30 times (hereinafter, foamed polyethylene 30 times), and the upper layer part 3c is It is composed of a flexible urethane foam, and each layer is bonded to each other with a double-sided tape.

  The second seat surface portion 4 supports the ischial portion when the user is sitting, and has a three-layer structure including a lower layer portion 4a, a middle layer portion 4b, and an upper layer portion 4c. The lower layer portion 4a is made of 30 times foamed polyethylene, the middle layer portion 4b is made of 30 times foamed polyethylene, the upper layer portion 4c is made of flexible urethane foam, and the layers are bonded to each other with a double-sided tape.

  The third seat surface portion 5 supports the buttocks when the user is sitting, and has a three-layer structure including a lower layer portion 5a, a middle layer portion 5b, and an upper layer portion 5c. The lower layer portion 5a is made of 15 times the foamed polyethylene, the middle layer portion 5b is made of 30 times the foamed polyethylene, the upper layer portion 5c is made of a flexible urethane foam, and the layers are bonded to each other with a double-sided tape.

  Since the first seat surface portion 3, the second seat surface portion 4, and the third seat surface portion 5 are configured as described above, the repulsive force of the second seat surface portion 4 is repelled by the first seat surface portion 3 and the third seat surface portion 5. It is smaller than force. As a result, the sciaticus sinks during the sitting position of the user, and the holding force of the second seating surface part 4 becomes larger than the holding force of the first seating surface part 3 and the third seating surface part 5 (here, Is the force given to the user by the seating surface part to suppress the person's longitudinal displacement), the sciatic part that is the axis when the trunk moves back and forth during feeding becomes difficult to shift, Efficient trunk movement is possible.

  In addition, the second seating surface portion 4 that supports the sciatic portion is configured as described above, thereby minimizing the subsidence range around the sciatic portion, making the subsidence depth appropriate, and the efficiency of moving the trunk back and forth. Increases sex. In addition, since the first seat surface portion 3, the second seat surface portion 4, and the third seat surface portion 5 are configured as described above, the balance of the respective repulsive forces is made appropriate, and the buttocks and lower thighs adjacent to the sciatic portion. Eliminates the feeling of strangeness when sitting in the club.

  In addition, by making the first seat surface portion 3, the second seat surface portion 4, and the third seat surface portion 5 have a three-layer structure, the repulsive force can be finely adjusted, and an appropriate balance of the repulsive force can be obtained. It should be noted that the same effect is obtained as long as the structure is not limited to a three-layer structure, but a plurality of layers of two or more layers.

  In addition, you may make it provide the cover for dirt prevention which covers the 1st seat surface part 3, the 2nd seat surface part 4, and the 3rd seat surface part 5. FIG.

  Further, the backrest B provided in the chair 100 according to the present invention includes a backrest frame portion 1c, a backrest support portion 9, a first backrest portion 6, a second backrest portion 7, and a third backrest. It has a bent portion 8.

  The backrest support portion 9 which is a plywood is bonded to the backrest frame portion 1c with a double-sided tape. A direction in which the second backrest portion 7 (other elastic member) and the third backrest portion 8 (other elastic member) face the seating surface A in this order below the first backrest portion 6 (elastic member). The backrests are bonded to the backrest support 9 by double-sided tape. The backrest surfaces of the first backrest portion 6, the second backrest portion 7 and the third backrest portion 8 are on one plane, and this plane is approximately 100 degrees with respect to the upper surface of the seating surface A. Make an angle. Here, approximately 100 degrees indicates that the angle is 97 degrees to 105 degrees. According to the inventor's scrutiny, it was found that when the angle is 97 ° to 105 °, the effect of preventing aspiration is significantly improved.

  The first backrest 6 can press the left and right posterior iliac spines, the upper sacrum, and the lumbar part (FIG. 1) from the fifth lumbar part to the second lumbar part when the user is sitting. It has a three-layer structure of a portion 6a, a middle layer portion 6b, and an upper layer portion 6c. The lower layer portion 6a is composed of 15 times foamed polyethylene, the middle layer portion 6b is composed of 30 times foamed polyethylene, the upper layer portion 6c is composed of 15 times foamed polyethylene, and the layers are bonded to each other with a double-sided tape.

  The second backrest portion 7 has a three-layer structure including a lower layer portion 7a, a middle layer portion 7b, and an upper layer portion 7c. The lower layer portion 7a is composed of 15 times the foamed polyethylene, the middle layer portion 7b is composed of 30 times the foamed polyethylene, the upper layer portion 7c is composed of 30 times the foamed polyethylene, and the respective layers are bonded to each other with a double-sided tape.

  The third backrest portion 8 has a three-layer structure of a lower layer portion 8a, a middle layer portion 8b, and an upper layer portion 8c. The lower layer portion 8a is composed of 30 times foamed polyethylene, the middle layer portion 8b is composed of 30 times foamed polyethylene, the upper layer portion 8c is composed of 30 times foamed polyethylene, and the layers are bonded to each other with a double-sided tape.

  By configuring the first backrest portion 6, the second backrest portion 7, and the third backrest portion 8 as described above, the elastic modulus of the second backrest portion 7 is the elastic modulus of the first backrest portion 6. The elastic modulus of the third backrest portion 8 is smaller than that of the second backrest portion 7. Here, the elastic modulus indicates a ratio between the pressure applied to the member from the back-facing front side and the deformation amount of the member when the pressure is applied. When the user sits down, the user presses the left and right posterior iliac spine, the upper sacrum, and the lumbar part from the fifth lumbar part to the second lumbar part against the first backrest part 6 having the highest elastic modulus. It is possible to move the trunk forward with high efficiency.

  Further, the backrest surface of each backrest portion is on one plane, and this plane forms an angle of about 100 degrees with respect to the upper surface of the seating surface A, and the elastic modulus of each backrest portion is lower as described above. Since it becomes small, the forward leaning posture (FIG. 2) accompanied by the natural curvature of the trunk can be stably maintained, and smooth swallowing can be realized. In addition, the stable maintenance of this posture prevents stomach pressure and does not inhibit breathing or coughing, and can cough firmly even during aspiration. In addition, the stable maintenance of this posture prevents the cervical extension posture and avoids aspiration as much as possible.

  Also, the height of the backrest B (H in FIG. 4) extends to the second lumbar portion when the user is sitting, so that there is no attempt to support the trunk around the seventh to tenth thoracic vertebrae. Inefficient trunk movement can be prevented. Also, it does not interfere with upper limb movements repeated during eating.

  Further, a gap is formed from the lower end of the third backrest portion 8 to the surface of the seating surface A, and the third seating surface portion 5 is visually recognized from the rear, which makes it easy to clean the third seating surface portion 5 that is easily soiled. Become.

  Further, by making the first backrest portion 6, the second backrest portion 7 and the third backrest portion 8 into a three-layer structure, the respective elastic moduli can be finely adjusted, and an appropriate elastic modulus balance can be obtained. Can do. It should be noted that the same effect is obtained as long as the structure is not limited to a three-layer structure, but a plurality of layers of two or more layers.

  Further, the first backrest portion 6, the second backrest portion 7, and the third backrest portion 8 may be configured as shown in FIG. 5 (FIG. 5 shows a state in which the backrest is viewed from the front side. ). In FIG. 5A, a frame-shaped outer frame 90 is attached to the backrest frame portion 1c, and the first mesh member 60 (elastic member) and the second mesh member 70 (other elastic members) are attached to the outer frame 90. Member) and the third mesh member 80 (another elastic member). The outer frame 90 is made of, for example, ABS resin. Moreover, the 1st mesh member 60, the 2nd mesh member 70, and the 3rd mesh member 80 comprise the thread | yarn material which consists of polyester resins, for example in mesh shape. And it is comprised so that an elasticity modulus may become small in order of the 1st mesh member 60, the 2nd mesh member 70, and the 3rd mesh member 80, and the magnitude | size of the tension | tensile_strength which a mesh member is tensioned is changed. Thus, the elastic modulus of each mesh member can be varied. The backrest surfaces of the first mesh member 60, the second mesh member 70, and the third mesh member 80 are on one plane, and this plane forms an angle of about 100 degrees with respect to the upper surface of the seating surface A. . As shown in FIG. 5B, the first mesh member 60, the second mesh member 70, and the third mesh member 80 may be attached to the backrest frame portion 1c.

  In addition, as shown in FIG. 6, the first mesh member 110, the second mesh member 120, and the third mesh member 130 having different areas are prepared, and the first mesh member 110 is attached to the backrest frame portion 1c, and the upper end is formed thereon. The second mesh member 120 may be pasted so as to match, and further the third mesh member 130 may be pasted so as to match the upper end thereof. Thereby, the backrest part C (elastic member) consisting of three layers, the backrest part D (other elastic members) consisting of two layers, and the backrest part E (other elastic members) consisting of one layer, from above. Thus, the elastic modulus decreases in the order of the backrest portion C, the backrest portion D, and the backrest portion E. The three planes including the backrest surfaces of the backrest portion C, the backrest portion D, and the backrest portion E form an angle of about 100 degrees with respect to the upper surface of the seat surface A.

  Moreover, you may comprise the 1st backrest part 6, the 2nd backrest part 7, and the 3rd backrest part 8 in one cover.

  As described above, according to the chair 100 of the present invention, physical fatigue can be reduced by efficient trunk movement during feeding, smooth swallowing can be achieved, and aspiration can be prevented as much as possible. You can achieve the basic purpose of feeding elderly people by taking the necessary calories and nutrients over time. Moreover, avoiding aspiration greatly contributes to the prevention of aspiration pneumonia and leads to relieving mental and physical stress of dietary caregivers.

  FIG. 7 (a) shows an embodiment in which the width of the frame 1 is widened in the chair 100 according to the present invention and armrests are provided on the left and right, and FIG. 7 (b) is a table added to the chair 100 according to the present invention. Examples are shown. The seated person's seat is in a horizontal state and the upper body's forward leaning posture is stably maintained, and both soles of the seated person are completely in contact with the floor. Thus, the sitting posture is further stabilized by being in contact with the armrest or the table naturally. The chair provided with the armrest and the posture made of the chair and the table are sitting postures that can prevent coughing of the stomach, do not inhibit breathing and coughing, and can cough firmly during aspiration.

  Further, as shown in FIG. 8, the backrest frame portion 1c may be further extended upward in the chair 100 according to the present invention. The extended backrest frame portion has the same shape as the backrest frame portion 1c up to the backrest height H, and obliquely upward in a direction away from the user's body at a position exceeding the backrest height H. It is formed so as to have a shape that is extended. That is, the backrest frame portion is formed in a substantially “<” shape in a side view. Then, another elastic member (not shown) is provided on the surface of the backrest frame portion at a position exceeding the backrest height H via another backrest portion support portion (not shown). In addition, a cushion portion 10 (restriction portion) capable of pressing the scapula portion when the user is sitting is provided on the surface of the backrest frame portion above the elastic member. The cushion part 10 may be configured by an air cushion or sponge covered with a cover. When elderly people requiring dietary care who are likely to cause aspiration frequently are users, such a cushion part 10 restricts the back movement of the scapula part, restricts the back movement of the trunk, and causes aspiration. An easy neck extension posture can be reliably prevented.

  In the chair 100 according to the present invention, two backrest portions 7 and 8 (other elastic members) are provided below the first backrest portion 6 (elastic member), but only one backrest portion (others) The elastic member) may be provided, or three or more backrest portions (other elastic members) may be provided.

  Further, in the chair 100 according to the present invention, the first backrest 6 is changed to a size capable of pressing the left and right posterior iliac spines and the upper sacrum except for the lumbar part from the fifth lumbar part to the second lumbar part. The second backrest portion 7 and the third backrest portion 8 may be removed. If the user is young, efficient trunk movement is possible if the left and right posterior iliac spines and the upper sacrum can be pressed against the backrest during forward movement of the trunk. If the chair is configured, it is possible to move the trunk efficiently when feeding young people, and if it is introduced as a working chair not only for feeding but also at the factory line, it can be used when working by young workers. Efficient trunk movement is possible, reducing physical fatigue and improving work efficiency.

  Next, the chair mounting tool according to the present invention will be described below.

  FIG. 9A shows a side view of the chair wearing tool 200 according to the present invention. The chair wearing tool 200 according to the present invention includes a main body part 11, a pressing part 12, a shaft 13, and a cushion part 14 (restriction part). The main body 11 includes a U-shaped portion 11a, a cushion portion support portion 11b, and a shaft support portion 11c, and is an integrally molded product such as resin or metal. The U-shaped portion 11a has a shape like a plate-like member bent in a U-shape when viewed from the side, and the front piece 11d of the opposed front piece 11d and rear piece 11e of the U-shaped piece 11a is from the rear piece 11e. Also extends longer. A shaft support portion 11c is formed at the left and right ends of the rear piece 11e. The pressing portion 12 includes a main body portion 12a having a shape obtained by bending a plate-like member into a mountain shape, and bearing portions 12b formed at both left and right end portions of the main body portion 12a. Then, the shaft 13 passes through the hole portion of the shaft support portion 11c and the hole portion of the bearing portion 12b, the shaft 13 is fixed to the shaft support portion 11c, and the pressing portion 12 is rotatably supported. The shaft 13 also penetrates a not-shown winding spring, and this winding spring urges the pressing portion 12 in the rotation direction (clockwise in the drawing) to approach the front piece 11d. Further, the cushion portion support portion 11b is a plate-like portion extending to the upper portion of the front piece 11d and supports the cushion portion 14. The cushion part 14 is, for example, a sponge covered with a cover.

  FIG.9 (b) shows the state which mounted | wore the chair mounting tool 200 based on this invention of the said structure. When the chair mounting tool 200 according to the present invention is mounted on a chair, first, an external force is applied to the pressing portion 12 to rotate the pressing portion 12 away from the front piece 11d against the urging force of the winding spring. When the backrest is sandwiched between the U-shaped portions 11a so that the front piece 11d comes into contact with the backrest surface on which the scooping occurs, and the external force applied to the pressing portion 12 is removed, the pressing portion 12 is energized by the winding spring. The chair mounting tool 200 according to the present invention is fixed to the chair by pressing the twist. In this state, the scapula can be pressed against the cushion portion 14 when the user is sitting. With such a chair wearing device 200 according to the present invention, the backward movement of the user's scapula is restricted, and it is accompanied by a natural curvature of the trunk that can achieve smooth swallowing and avoid aspiration as much as possible. A forward leaning posture can be stably maintained. Moreover, since the chair mounting tool 200 which concerns on this invention has a clip type mounting mechanism as mentioned above, mounting | wearing becomes easy.

  FIG. 10 (a) shows a side view of a chair wearing tool 200 'according to another embodiment of the present invention. The chair mounting tool 200 ′ according to the present invention includes a main body portion 15, a tightening screw portion 16 that is a rod-like member having a surface formed with a screw, a pressing portion 17, a gripping portion 18, and a cushion portion 19 (restriction portion). With. The main body portion 15 is composed of a U-shaped portion 15a and a cushion portion support portion 15b, and is an integrally molded product such as resin or metal. The U-shaped portion 15a has a shape like a plate-like member bent into a U-shape when viewed from the side, and the front piece 15c of the opposed front piece 15c and rear piece 15d of the U-shaped piece 15a is formed from the rear piece 15d. Also extends longer. A screw hole 15e is formed in the rear piece 15d, and a tightening screw portion 16 is threaded through the screw hole 15e. A pressing portion 17 is provided at one end of the tightening screw portion 16, and a gripping portion 18 is provided near the other end. The cushion portion support portion 15b is a plate-like portion that extends to the upper portion of the front piece 15c and supports the cushion portion 19. The cushion portion 19 is, for example, a sponge covered with a cover.

  FIG. 10B shows a state in which the chair mounting tool 200 ′ according to the present invention having the above configuration is mounted on the chair. When the chair mounting tool 200 ′ according to the present invention is mounted on the chair, the front piece 15c is brought into contact with the backrest surface on which the user can lean, the gripping portion 18 is gripped, the tightening screw portion 16 is rotated and tightened. The pressing portion 17 is brought close to the backrest together with the screw portion 16, and the pressing portion 17 is pressed against the backrest by tightening the tightening screw portion 16, so that the chair fitting 200 ′ according to the present invention is fixed to the chair. In this state, the scapula can be pressed against the cushion 19 when the user is sitting. Such a chair wearing device 200 ′ according to the present invention limits the rearward movement of the user's shoulder blades, realizes a natural curvature of the trunk that allows smooth swallowing and avoids aspiration as much as possible. The accompanying forward leaning posture can be stably maintained. Moreover, since the chair mounting tool 200 ′ according to the present invention has the screw-type mounting mechanism as described above, it can be mounted on chairs having various thicknesses of backrest.

  Chairs and chair fittings according to the present invention are installed for feeding elderly people in medical institutions, elderly accommodation facilities, care recipient accommodation facilities, general households, food and beverage provision facilities, transportation facilities, etc. This will improve the quality of life for both elderly and caregivers. In addition, the chair according to the present invention is not limited to feeding elderly people, but may be used for improving work efficiency by being installed for young people working in a factory line. Various other utilization methods are assumed for the chair and the chair mounting tool according to the present invention.

a left and right sciatic b b left and right posterior iliac spine c upper sacrum d fifth lumbar vertebra e fourth lumbar vertebra f third lumbar vertebra g second lumbar vertebra h trunk t i sciatic part j B Backrest H Backrest height 1 Frame 1a Leg frame portion 1b Seat frame portion 1c Backrest frame portion 2 Seat surface portion support portion 3 First seat surface portion 4 Second seat surface portion 5 Third seat surface portion 6 First backrest Part 7 Second back part 8 Third back part 9 Back part support part 10 Cushion part 11 Main body part 12 Press part 13 Shaft 14 Cushion part 15 Main part 16 Tightening screw part 17 Press part 18 Gripping part 19 Cushion part 60 First mesh member 70 Second mesh member 80 Third mesh member 90 Outer frame 110 First mesh member 120 Second mesh member 130 Third mesh member C, D, E Backrest

Claims (6)

The backrest has a backrest and a seating surface, and the backrest has an elastic member composed of a single layer or a plurality of layers for pressing the left and right posterior iliac spines and the upper sacrum at the time of sitting of the user,
In the backrest, at least one other elastic member composed of a single layer or a plurality of layers is arranged below the elastic member in a direction toward the seat surface, and the elastic member and at least one other elastic member are arranged. The elastic modulus decreases toward the bottom, and at least one plane including the backrest surfaces of the elastic member and at least one other elastic member forms an angle of approximately 100 degrees with respect to the upper surface of the seat surface. A chair characterized by that.   The said elastic member is an elastic member for pressing the lumbar part from the 5th lumbar part to the 2nd lumbar part in addition to the left and right posterior iliac spine and the upper sacral part. Chair.   The chair according to claim 1 or 2, wherein the at least one other elastic member is one or three or more.   The chair according to any one of claims 1 to 3, wherein a height of the backrest is set to a second lumbar portion when the user is sitting.   The chair according to any one of claims 1 to 4, further comprising a restriction unit that restricts backward movement of the scapula portion when the user is sitting on the upper side of the elastic member.   The said seat surface has a seat surface part which supports a user, The clearance gap is provided under the said elastic member so that the said seat surface part can be visually recognized from back, The any one of Claims 1-5 characterized by the above-mentioned. The chair described in Crab.

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