JP5898794B1 - Standing and sitting aids and chairs - Google Patents

Abstract

An object of the present invention is to provide a standing / sitting assistance device that allows a seated person to easily take a sitting posture when sitting, and to improve safety when standing up. A standing assist device (1) assists a seated person sitting on an object to be seated, and a base (10) placed on the object to be seated and a front side edge of the base (10). A seat portion 20 that is pivotally attached and seated by a seated person, a rail portion 30 that is provided on an upper surface of the base 10 facing the seat portion 20 and extends in a predetermined direction, and a lower end thereof slides on the rail portion 30. The upper end of the seating portion 20 is pivotally connected to the lower surface of the seating portion 20 facing the pedestal 10 and is pivotally connected to expand and contract by a predetermined distance. A buffer urging portion 40 for buffering, and an elastic portion 50 for urging the lower end of the buffer urging portion 40 in a direction to return the lower end of the buffer urging portion 40 when the lower end of the buffer urging portion 40 in the rail portion 30 slides. The buffer urging unit 40 is seated on the seat 20 by a seated person, After shrunken by releasing its lower end slides the rail portion 30. [Selection] Figure 1

Description

  The present invention relates to a standing / sitting assistance device and chair, and more particularly, to a standing / sitting assistance device and chair that assists a sitting person to sit and sit.

  2. Description of the Related Art Conventionally, physically weak persons such as elderly persons whose legs and legs are weakened are difficult to bend their knees from a standing state, move their center of gravity back, and sit down on a chair. In addition, such physically weak persons are difficult to move up from the chair while standing on the chair while raising their waists while moving the center of gravity behind them.

Therefore, the load received by the seat portion rotatably provided on the pedestal is absorbed by the main damper means having both the urging action and the buffering action, and the parallel movement of the movable portion and the fixed portion of the seat portion is supported by an auxiliary spring. A standing assistance device having a function of assisting has been proposed (Patent Document 1).
According to this standing assistance device, the standing motion (standing motion) of the seated person can be assisted by the main damper means and the auxiliary spring without complicating the structure.

JP 2013-90858 A

Here, when a seated person sits on the standing assistance device of Patent Document 1, the load received by the seating portion increases as the seated person's waist falls. That is, when a seated person is seated, it is desirable that the force that requires assistance by the seating portion is small in the first half of the sitting operation and large in the second half of the sitting motion.
On the other hand, when the seated person stands up, the load received by the seated portion becomes smaller as the seated person's waist rises. That is, when a seated person stands up, it is desirable that the force required to be assisted by the seating portion is large in the first half of the rising action and small in the second half of the rising action.

However, when the seated person sits or stands up, the standing assist device of Patent Document 1 receives the load received by the seating portion by a constant biasing action or a buffering action by the main damper means and the auxiliary spring.
For this reason, when the seated person is seated, it is received by the buffering force of the main damper means and the auxiliary spring. For example, when the weight of the seated person is relatively light, the seating part does not rotate to the pedestal side, The person may not be seated.
In addition, when the seated person stands up, the force exerting a constant biasing action by the main damper means and the auxiliary spring works even in the latter half of the standing up action, so that the seated person is pushed forward and falls forward. There is also a fear.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sitting assistance device and a chair that enable a seated person to easily take a sitting posture when sitting, and improve safety when standing up.

(1) A standing / sitting assisting device for assisting a sitting person sitting on an object to be seated,
A pedestal placed on the adherend;
A seating portion on which a side edge on the front side is rotatably attached to the pedestal, and seated by a seated person,
A rail portion provided on an upper surface facing the seating portion of the pedestal and extending in a predetermined direction;
The lower end thereof is connected to the rail portion so as to be slidable and rotatable, and extends upward, and the upper end thereof is rotatably connected to the lower surface of the seat portion facing the pedestal, and extends and contracts by a predetermined distance. A buffer biasing portion that biases in the direction and cushions the force in the contracting direction;
An elastic portion that urges the lower end of the buffer urging portion in a direction to return the lower end when the lower end of the buffer urging portion in the rail portion slides,
The lower end of the buffer urging portion is further lowered after the buffer urging portion is contracted by the predetermined distance as the seating portion rotates according to the seating of the seated person on the seating portion. A standing / sitting assistance device that starts sliding movement on the rail portion against the urging force of the elastic portion as it rotates .

According to the invention of (1), the standing / sitting assistance device assists a sitting person sitting on the object to be seated, and includes a pedestal, a seating part, a rail part, a buffer urging part, and an elastic part. .
The pedestal is placed on the object to be seated.
The seating portion is attached to the pedestal so that the side edge on the front side is freely rotatable, and a seated person is seated.
A rail part is provided in the upper surface which faces the seating part of a base, and is extended in a predetermined direction.
The lower end of the buffer urging portion is connected to the rail portion so as to be slidable and rotatable, extends upward, and the upper end thereof is connected to the lower surface facing the base of the seating portion so as to be rotatable, and expands and contracts by a predetermined distance. Then, it is urged in the extending direction and the force in the contracting direction is buffered.
The elastic portion urges the lower end of the buffer urging portion in a direction to return the lower end of the buffer urging portion when the lower end of the buffer urging portion in the rail portion slides.
Then, after the seated person sits on the seating portion and contracts by a predetermined distance, the lower end of the buffer biasing portion slides on the rail portion.

Thereby, the standing / sitting assisting device operates as follows.
First, the seated person places the standing assisting device on the object to be seated and sits down toward the seating part. And if a seated person's buttocks contact | abuts to a seating part, a buffer biasing part will shrink | shrink only the predetermined distance, absorbing the pressure by the weight of the seated person who a seating part receives.
At this stage, the occupant's posture is such that the center of gravity is lowered more backward than at the beginning of sitting. For this reason, the pressure by the weight of the seated person received by the seating portion is larger than that at the beginning of sitting.
In such a stage, the lower end of the buffer urging portion slides on the rail portion. At this time, the elastic portion urges the buffer urging portion in a direction to return the lower end.

Thus, according to the invention of (1), when the seated person sits down, the standing / sitting assistance device buffers the pressure at the beginning of the sitting stage where the seat part does not receive much pressure due to the weight of the seated person. Absorb gently by the urging section.
The standing / sitting assistance device absorbs the pressure by the elastic portion when the pressure due to the weight of the seated person increases in the seating portion.
Therefore, for example, even when the weight of the seated person is relatively light, the seating part rotates to the pedestal side, so that the seated person can easily take the sitting posture.

On the other hand, when the seated person stands up, the standing / sitting assistance device rotates the seated part to the front side at a stretch by the elastic part at the stage of starting to rise when a greater force is required for the seated person to stand up.
The standing assisting device gently urges the seating portion with the buffer urging portion when the urging force is not urged by the elastic portion.
Therefore, when the seated person stands up, in the second half of the standing up action, the urging force to the seating portion becomes gentle, so that it is possible to prevent an accident that the seated person is pushed forward and falls forward.
Therefore, when sitting, a seated person can easily take a sitting posture, and a standing / sitting assistance device that can improve safety when standing up can be provided.

  According to the invention of (1), as a configuration for receiving the weight of the seated person, a member that requires a power source is not used, and a buffer biasing portion (for example, a gas cylinder) and an elastic portion (for example, a spring) are used. By adopting, the use place is not limited to, for example, a place where power can be supplied, and the use of the standing / sitting assistance device becomes possible. In addition, since the power cord wiring is eliminated, an accident that stumbles into the power cord is also suppressed.

  In addition, as a structure for receiving the weight of the seated person, a buffer urging portion (for example, a gas cylinder) and an elastic portion (for example, a spring) are adopted, so that the structure of the standing assistance device is simple and the weight is reduced. It becomes possible. Thereby, even one elderly person can carry.

Furthermore, for example, by making the standing / sitting assistance device portable, it is possible to use it anywhere without being limited to the place of use or the chair to be used.
That is, the “seat to be seated” in the present invention is not limited to a chair, and includes any object such as a floor and a bench as long as a seated person can sit on the seat.

(2) When the lower end of the buffer urging portion in the rail portion slides on the rail portion against the urging of the elastic portion, the elastic portion is formed with a weaker elastic force than the elastic portion, The standing / sitting assistance device according to (1), further including an auxiliary elastic portion that urges the buffer urging portion in a direction to return the lower end of the buffer urging portion.

According to the invention of (2), the standing / sitting assistance device further includes an auxiliary elastic part.
The auxiliary elastic portion is formed with a weaker elastic force than the elastic portion, and when the lower end of the buffer urging portion in the rail portion slides, the auxiliary elastic portion is urged in a direction to return the lower end of the buffer urging portion.

As a result, the lower end of the buffer urging portion in the rail portion slides between the elastic portion formed with a relatively strong elastic force and the auxiliary elastic portion formed with a relatively weak elastic force. In this case, the lower end of the buffer urging unit is urged in the direction of returning.
Therefore, it is possible to adjust the allowable load of the standing / sitting assistance device and finely adjust the force applied to the seating portion during standing / sitting.

  (3) The sitting / sitting assistance device according to (2), further including an adjustment unit that adjusts a force applied by the elastic unit and / or the auxiliary elastic unit.

According to the invention of (3), the standing / sitting assisting device further includes an adjustment unit.
The adjustment unit adjusts the force applied by the elastic unit and / or the auxiliary elastic unit.
As a result, the standing / sitting assistance device can adjust the allowable load of the standing / sitting assistance device and finely adjust the force applied to the seating portion during standing / sitting.

(4) In a chair provided with a seating portion on which a seated person sits,
Standing and sitting aids are provided on the seating part,
The standing / sitting aid is:
A pedestal provided in the seating portion;
A seating portion on which a side edge on the front side is rotatably attached to the pedestal, and seated by a seated person,
A rail portion provided on an upper surface facing the seating portion of the pedestal and extending in a predetermined direction;
The lower end thereof is connected to the rail portion so as to be slidable and rotatable, and extends upward, and the upper end thereof is rotatably connected to the lower surface of the seat portion facing the pedestal, and extends and contracts by a predetermined distance. A buffer biasing portion that biases in the direction and cushions the force in the contracting direction;
An elastic portion that urges the lower end of the buffer urging portion in a direction to return the lower end when the lower end of the buffer urging portion in the rail portion slides,
The lower end of the buffer urging portion is further lowered after the buffer urging portion is contracted by the predetermined distance as the seating portion rotates according to the seating of the seated person on the seating portion. The chair which starts the sliding movement on the said rail part which resisted the urging | biasing force of the said elastic part with rotation .

  According to the invention of (4), it is possible to provide a chair that exhibits the same effects as the invention of (1).

  (5) The chair according to (4), wherein the buffer urging portion is detachably connected to the lower surface of the seating portion.

According to the invention of (5), the buffer urging portion is detachable from the lower surface of the seating portion.
Thus, in a state where the buffer urging portion is mounted on the lower surface of the seating portion, the chair has the same effect as the invention of (1), and in a state where the buffer urging portion is removed from the lower surface of the seating portion, the seating portion Can be used as a normal chair that does not rotate forward, so the usage of the chair can be diversified.

  ADVANTAGE OF THE INVENTION According to this invention, when sitting, a seated person can be in a seating posture easily and can provide the standing assistance device and chair which can improve the safety | security when standing up.

It is a perspective view of standing assistance device 1 concerning an embodiment of the present invention. It is a perspective view of seating part 20A concerning the modification of the embodiment. It is a perspective view of seating part 20A concerning the modification of the embodiment. It is a side view of the standing assistance device 1 which concerns on the said embodiment. It is a side view of the standing assistance device 1 which concerns on the said embodiment. It is a side view of the standing assistance device 1 which concerns on the said embodiment. It is a figure which shows the state which removed the seating part 20 and the buffer urging | biasing part 40 from the standing assistance apparatus 1 which concerns on the said embodiment. It is a perspective view of the chair 100 which concerns on the said embodiment. FIG. 4 is a perspective view of the chair 100 in a state where a buffer urging portion 40A according to the embodiment is removed from a seating portion 20. It is a figure explaining 70 A of adjustment parts of 1 A of standing assistance devices which concern on the modification of the said embodiment. FIG. 10A shows a state in which the tensile force of the elastic portion 50 is default. FIG. 10B shows a state where the tensile force of the elastic portion 50 is larger than the default state.

  Hereinafter, although embodiment of this invention is described, this invention is not limited to this. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.

[Standing aid 1]
First, the configuration of the standing / sitting assistance device 1 according to the embodiment will be described with reference to the drawings.
FIG. 1 is a perspective view of a standing / sitting assistance device 1 according to an embodiment of the present invention.

  The standing / sitting assistance device 1 assists a seated person sitting on an object to be seated, and includes a base 10, a seating part 20, a rail part 30, a buffer biasing part 40, an elastic part 50, and auxiliary elasticity. Unit 60 and adjustment unit 70.

The pedestal 10 is provided at the front end of the upper surface of the base 11 formed on a plate-like body on which the lower surface is placed on the object to be seated, protrudes upward, and the front end of the seating portion 20 rotates. The front protrusion 12 is movably attached, and is provided at the rear end of the upper surface of the base 11. The front protrusion 12 is arranged at the same height as the front protrusion 12. A rear projecting portion 13 projecting up to the height of the hinge that is pivotally connected to the height of the front projecting portion 12).
Thus, in the pedestal 10, by providing the front protrusion 12 and the rear protrusion 13 having substantially the same height, the seat 20 that is rotatably attached to the front protrusion 12 is the end on the rear end side. When the vicinity abuts against the rearward projecting portion 13, it is arranged in parallel with the base 11 with a predetermined distance from the base 11.
In addition, in this embodiment, although the base 11 was formed with the plate-shaped body, the base 10 is not limited thereto, and may be formed with only the bone member. Thereby, the weight reduction of the standing / sitting assistance instrument 1 is attained.

The seating part 20 is attached to the front projecting part 12 of the pedestal 10 so that the side edge on the front side is pivotable. When the seated person is seated, the vicinity of the rear side end part depends on the weight of the seated person. It comes into contact with the rear projecting portion 13 and is in a state parallel to the base 11 of the base 10.
And when a seated person stands up, the seat part 20 will be pressed from the state parallel to the base 11 by the buffer urging | biasing part 40 and the elastic part 50, and a rear-end side will rotate ahead.

2 and 3 are perspective views of a seating portion 20A according to a modification of the embodiment. FIG. 2 is a view of the seating portion 20A as viewed obliquely from above, and FIG. 3 is a view of the seating portion 20A as viewed from obliquely below.
The seating part 20 according to the present embodiment is formed of only a plate-like body as shown in FIG. However, like the seating portion 20A according to the modification shown in FIGS. 2 and 3, the seating portion extends downward from the side edge of the plate-like body 21A and the plate-like body 21A whose side edge is inclined downward. The side wall that surrounds the pedestal 10, the rail portion 30, the buffer urging portion 40, the elastic portion 50, the auxiliary elastic portion 60, and the adjusting portion 70 in a state in which the body 21 </ b> A is parallel to the base 11 (see FIG. 1) of the pedestal 10 And 22A.
Thus, the comfort at the time of sitting can be improved by inclining the side edge of 21 A of plate-shaped bodies which a seated person seats below. Further, by providing the side wall 22A, when the seated person sits on the plate-like body 21A, the clothes of the seated person can be prevented from being caught between the plate-like body 21A and the base 10 (see FIG. 1).
In addition, the seat portion 20A may be provided with an acupoint sheet 23A having a plurality of convex portions formed in a hemispherical shape on the upper surface of the plate-like body 21A.
Thus, by providing the acupoint sheet 23A, it is possible to stimulate the seated person's buttocks and thigh acupoints, and to prevent the buttocks and the like from being displaced from the plate-like body 21A.
Further, the plate-like body 21 </ b> A is not limited to a flat plate shape, and may have irregularities that fit the thighs.

  The rail portion 30 is provided on the upper surface of the base 10 facing the seating portion 20, extends in a predetermined direction (for example, the front-rear direction shown in FIG. 1), engages with the rail 31, and extends in the direction in which the rail 31 extends. And an engaging portion 32 that slides and is connected to the lower end of the buffer urging portion 40 so as to be freely rotatable.

4 to 6 are side views of the standing / sitting assistance device 1 according to the embodiment.
FIG. 4 is a diagram illustrating a state where no load is applied to the seating portion 20 (a state where no seated person is sitting).
FIG. 5 is a diagram showing a state where a load is applied to the seating portion 20 (a state where a seated person is sitting) and the buffer urging portion 40 is contracted by a predetermined distance d.
FIG. 6 is a diagram illustrating a state in which a load is applied to the seating portion 20 (a state in which a seated person is sitting) and the seating portion 20 is parallel to the base 11 of the base 10.

The lower end of the buffer urging portion 40 is pivotally connected to the engaging portion 32 of the rail portion 30 and extends upward, and the upper end thereof is pivotally connected to the lower surface of the seating portion 20 facing the base 10. Then, it expands and contracts by a predetermined distance d, urges it in the extending direction (direction toward E in FIG. 1), and buffers the force in the contracting direction (direction toward S in FIG. 1).
The buffer urging portion 40 is moved from the state shown in FIG. 4 to the engaging portion 32 after the seated person is seated on the seat portion 20 and contracted by a predetermined distance d (after the state shown in FIG. 5 is reached). The connected lower end slides forward along the rail 31 of the rail part 30, for example, and it will be in the state shown in FIG.
In addition, although the buffer urging | biasing part 40 is comprised with the gas cylinder in this embodiment, you may comprise not only this but the liquid cylinder buffered and urged | biased with the liquid.

When the lower end of the buffer urging portion 40 in the rail portion 30 slides forward, for example, the elastic portion 50 is urged in a direction to return the lower end of the buffer urging portion 40 (for example, rearward in FIG. 5). To do.
The elastic part 50 is configured by a spring, the front end is connected to the engaging part 32 of the rail part 30, and the rear end is connected to the adjusting part 70.
The elastic part 50 is in a default state in which no load is applied to the seating part 20 (the state shown in FIG. 4).
Then, the elastic portion 50 starts to expand from the state shown in FIG. 4 from the state where the seated person sits on the seating portion 20 and the buffer biasing portion 40 is contracted by a predetermined distance d (the state shown in FIG. 5). The state shown in FIG. 6 is obtained while urging the engaging part 32 to which the lower end of the urging part 40 is connected in a returning direction (for example, rearward in FIG. 5).

FIG. 7 is a view showing a state in which the seating portion 20 and the buffer urging portion 40 are removed from the standing and sitting assistance device 1 according to the embodiment.
The auxiliary elastic portion 60 is formed with a weaker elastic force than the elastic portion 50, and when the lower end of the buffer urging portion 40 (see FIG. 1) in the rail portion 30 slides, the lower end of the buffer urging portion 40 is moved. Energize in the return direction.
The auxiliary elastic part 60 is provided on the opposite side of the elastic part 50 across the rail part 30.
The auxiliary elastic part 60 is the same as the elastic part 50 except that it is formed with a weaker elastic force than the elastic part 50, and thus detailed description thereof is omitted.
Moreover, although the standing / sitting assistance device 1 includes the auxiliary elastic part 60, the auxiliary elastic part 60 may be omitted.

As shown in FIG. 4, the adjusting unit 70 adjusts the force applied by the elastic unit 50 and / or the auxiliary elastic unit 60.
The adjustment portion 70 is connected to the rear end of the elastic portion 50 or the auxiliary elastic portion 60, has a rod-like body 71 formed with a thread, and a hole through which the rod-like body 71 is inserted, and a support portion fixed to the pedestal 10. 72 and a nut portion 73 that is screwed into the rod-like body 71 protruding from the hole of the support portion 72 and abuts against the support portion 72.
Thereby, the seated person rotates the nut portion 73 and moves the rod-like body 71 back and forth, thereby extending or contracting the elastic portion 50 and the auxiliary elastic portion 60 in the default state, and the elastic portion 50 or The urging force of the auxiliary elastic part 60 is adjusted.

Next, the operation of the standing / sitting assistance device 1 will be described.
First, the seated person places the standing / sitting assistance device 1 on the object to be seated and sits down toward the seating part 20 from the state shown in FIG. Then, when the seated person's buttocks abuts against the seating part 20, the standing assisting device 1 allows the buffer biasing part 40 to absorb the pressure due to the body weight of the seated person received by the seating part 20 while maintaining a predetermined distance d. It shrinks only and it will be in the state shown in FIG.
At this stage, the occupant's posture is such that the center of gravity is lowered more backward than at the beginning of sitting. For this reason, the pressure by the weight of the seated person received by the seating section 20 is larger than that at the beginning of sitting.
In such a stage, the engaging portion 32 to which the lower end of the buffer urging portion 40 is connected slides along the rail 31. At this time, the elastic part 50 and the auxiliary elastic part 60 urge in the direction to return the engaging part 32 to which the lower end of the buffer urging part 40 is connected. And when the seated person has sat down, the standing / sitting assistance device 1 is in the state shown in FIG.

On the other hand, when the seated person stands up, the standing / sitting assistance device 1 moves the seating part 20 forward by the elastic part 50 and the auxiliary elastic part 60 at a stretched stage when a greater force is required for the seated person to stand up. Turn to.
The standing assist device 1 gently urges the seating portion 20 by the buffer urging portion 40 when the urging force is not urged by the elastic portion 50 and the auxiliary elastic portion 60.

The standing assisting device 1 operates in the above-described configuration, so that when the seated person sits, the pressure at the beginning of sitting where the seating portion 20 does not receive much pressure due to the weight of the seated person is buffered. It is absorbed gently by the part 40.
The standing assisting device 1 absorbs the pressure by the elastic portion 50 when the pressure due to the weight of the seated person increases in the seat portion 20.
Therefore, for example, even when the weight of the seated person is relatively light, the seating part rotates to the pedestal side, so that the seated person can easily take the sitting posture.

In addition, when the seated person stands up, the standing assisting device 1 gently pushes the seated person forward and falls forward in the latter half of the standing up action because the seating part 20 is gently biased. Can prevent accidents.
Therefore, when sitting, a seated person can easily take a sitting posture, and a standing / sitting assistance device that can improve safety when standing up can be provided.

  In addition, the standing and assisting instrument 1 is configured to receive the weight of the seated person without using a member that requires a power source, and adopting the buffer urging portion 40 and the elastic portion 50, so that the place of use is, for example, The sitting / sitting assistance device 1 can be used without being limited to a place where power can be supplied. In addition, since the power cord wiring is eliminated, an accident that stumbles into the power cord is also suppressed.

  Further, by adopting the buffer urging portion 40 and the elastic portion 50 as a configuration for receiving the weight of the seated person, the structure of the standing / sitting assistance device 1 is simple and the weight can be reduced. Thereby, even one elderly person can carry.

  Further, for example, by making the standing / sitting assisting device 1 portable, it is possible to use it anywhere without being limited to a place of use or a chair to be used.

The standing / sitting assisting device 1 includes an elastic portion 50 formed with a relatively strong elastic force and an auxiliary elastic portion 60 formed with a relatively weak elastic force. Is urged in a direction in which the lower end of the buffer urging portion 40 is returned.
Therefore, it is possible to adjust the allowable load of the standing / sitting assistance device 1 and finely adjust the force applied to the seating portion 20 during standing / sitting.

  The standing / sitting assistance device 1 is also applied to the seating portion during adjustment of the allowable load and standing / sitting of the standing / sitting assistance device 1 by the adjusting unit 70 that adjusts the force applied by the elastic part 50 and the auxiliary elastic part 60. Fine adjustment of the force becomes possible.

  The standing / sitting assistance device 1 may be attached to any object on which a person sits such as a chair, a table, and a toilet. Moreover, the attachment location is set to arbitrary places according to each space, such as under the seat surface of a chair, etc., or a side surface.

[Chair 100]
Next, the chair 100 according to the embodiment will be described.
FIG. 8 is a perspective view of the chair 100 according to the embodiment.
The chair 100 is provided with a leg portion 110 standing from the floor surface, a seating portion 120 supported by an intermediate position of the leg portion 110, and provided with the standing and sitting assistance device 1A according to the modified example of the standing and sitting assistance device 1, A backrest portion 130 fixed to the upper end side of the leg portion 110.

  The leg portion 110 includes two front legs 111 and two rear legs 111 arranged at a predetermined interval. The leg portion 110 can have any shape as long as the seat portion 120 can be supported at a predetermined height from the floor surface.

  The seating portion 120 connects the two front legs 111 and the two rear legs 111 to each other, and includes a pair of first horizontal members 121 and a pair of first horizontal members 121 extending horizontally in the left-right direction. A pair of second horizontal members 122 that are connected to each other, extend horizontally in the front-rear direction, and are arranged at predetermined intervals, and are surrounded by the pair of first horizontal members 121 and the pair of second horizontal members 122. The standing / sitting assistance device accommodating portion 123 is formed.

The standing / sitting assistance device 1A according to the modification is different from the standing / sitting assistance device 1 according to the embodiment described above in the configurations of the base 10A, the buffer urging unit 40A, and the adjustment unit 70A.
The standing and sitting assistance device 1A includes a base 10A, a seating portion 20, a rail portion 30, a buffer biasing portion 40A, an elastic portion 50, an auxiliary elastic portion 60, and an adjusting portion 70A.

  The pedestal 10 </ b> A is formed in a plate-like body, is fixed to the lower ends of the pair of first horizontal members 121 and the pair of second horizontal members 122, and constitutes the bottom surface of the standing-sitting assisting instrument housing portion 123.

In the sitting / sitting assisting device 1A, the seating portion 20 is attached to the upper end of the first horizontal member 121 on the front side so that the side edge on the front side is pivotable, and the seated person sits down. The first horizontal member 121 on the rear side comes into contact with the upper end of the first horizontal member 121 and is parallel to the base 10A.
A receiving portion 42 that engages with an engaging portion 41 of a buffer urging portion 40A described later is attached to the lower surface of the seating portion 20 facing the base 10A.
And if a seated person stands up, the seating part 20 will be pressed by the buffer urging | biasing part 40A, the elastic part 50, and the auxiliary | assistant elastic part 60 which are mentioned later from the state parallel to the base 10A, and a rear-end side will rotate ahead.

  In addition, the sitting assistance device 1A may be further provided with a lid portion that is fixed to the upper ends of the pair of first horizontal members 121 and the pair of second horizontal members 122 and closes the standing assistance device housing portion 123. . In this case, the lid portion is provided with an opening through which the buffer urging portion 40A can project, and a cushion that is in contact with the lower surface of the seating portion 20A when the seating portion 20A is parallel to the base 10A. May be. By such a lid portion, it is possible to prevent dust and the like from entering the standing / sitting assistance device accommodating portion 123, and to reduce the malfunction of the standing / sitting assistance device 1A due to dust and the like. Further, by providing the cushion, the impact when the seated person sits can be reduced, and the sitting comfort of the chair 1A can be improved.

The buffer biasing portion 40A is different from the buffer biasing portion 40 (see FIG. 1 and the like) in that it is detachably connected to the lower surface of the seating portion 20 facing the base 10A.
FIG. 9 is a perspective view of the chair 100 in a state where the buffer urging unit 40A according to the embodiment is removed from the seating unit 20. FIG.
The buffer urging portion 40 </ b> A includes an engaging portion 41 that engages with a receiving portion 42 attached to the lower surface of the seating portion 20.
The engaging part 41 includes a shaft part 411 extending in the left-right direction.
The receiving portion 42 is open at the lower end, extends upwardly and backwardly from the front, and has a groove 421 at which the peripheral surface of the shaft portion 411 can be engaged at the upper end.

When attaching the buffer urging portion 40 </ b> A to the seating portion 20, the shaft portion 411 of the engaging portion 41 is inserted from the lower end of the groove 421 of the receiving portion 42 and engaged with the upper end of the groove 421.
In this state, when a seated person sits on the seat portion 20, the buffer biasing portion 40A biases the engaging portion 41 from the front side to the rear side. At this time, since the shaft portion 411 is engaged with the groove 421 inclined upward from the front to the rear, it does not come out of the groove 421. The force urged by the buffer urging portion 40 </ b> A is transmitted to the seating portion 20 via the receiving portion 42.
On the other hand, when removing the buffer urging portion 40 </ b> A from the seating portion 20, the shaft portion 411 of the engaging portion 41 is extracted from the lower end of the groove 421 of the receiving portion 42. Thereby, the seating portion 20 is not biased by the buffer biasing portion 40A.

FIG. 10 is a diagram for explaining an adjustment unit 70A of the standing / sitting assistance device 1A according to the modification of the embodiment. FIG. 10A shows a state in which the tensile force of the elastic portion 50 is default. FIG. 10B shows a state where the tensile force of the elastic portion 50 is larger than the default state.
As illustrated in FIG. 10A, the adjustment unit 70 </ b> A includes a connection unit 73, a screw rod 74, and a gripping unit 75.
The connection part 73 is formed in a quadrangular cross-sectional shape, and the rear end of the elastic part 50 is connected to the front end. The connecting portion 73 has a screw hole 73a extending from the rear end toward the front end side and having a thread formed on the inner wall.
The screw rod 74 extends in the front-rear direction, and is formed with a screw thread that is threadedly engaged with the screw thread of the screw hole 73a on its circumferential surface. The screw rod 74 passes through the first horizontal member 121 on the rear side in a freely rotatable manner, and accommodates a standing and sitting aid. It protrudes outside the portion 123.
The gripping part 75 is fixed to the rear end of the screw rod 74 outside the standing / sitting assisting instrument housing part 123 and gripped by a user such as a seated person.

For example, in the default state shown in FIG. 10A, a user such as a seated person rotates the gripping portion 75 in a predetermined direction with the extending direction of the screw rod 74 as a rotation axis, thereby moving the screw rod 74 in a predetermined direction. Rotate to Then, the connection part 73 which has the screw hole 73a screwed with the screw rod 74 moves from the front to the back while pulling the rear end of the elastic part 50. Thereby, the state of the elastic part 50 will be in the state shown in FIG.10 (b) in which the tensile force became larger than the default state.
On the other hand, when weakening the pulling force of the elastic portion 50, a user such as a seated person rotates the gripping portion 75 in a direction opposite to the predetermined direction with the extending direction of the screw rod 74 as a rotation axis, thereby causing the screw rod 74 to rotate. Is rotated in the direction opposite to the predetermined direction. Then, the connection part 73 having the screw hole 73a screwed with the screw rod 74 moves from the rear to the front, the entire length of the elastic part 50 is reduced, and the tensile force of the elastic part 50 is weakened.
As described above, according to the chair 100 according to the present embodiment, the gripping portion 75 serving as the operation portion that can adjust the force urged by the elastic portion 50 is disposed on the outside of the standing assisting device accommodating portion 123. Thereby, for example, when a seated person is seated on the seating part 20 or when a cover part covering the standing assist device accommodating part 123 is provided, even when the elastic part 50 cannot be directly touched, By operating the gripping portion 75 serving as an operation portion arranged outside the standing / sitting assisting device accommodating portion 123, the force applied by the elastic portion 50 can be adjusted.

Moreover, according to the chair 100, the chair which produces the effect similar to the standing assistance device 1 of this embodiment can be provided.
Further, according to the chair 100, in a state where the buffer biasing portion 40A is mounted on the lower surface of the seating portion 20, the chair 100 has the same effect as the standing assisting device 1, and the buffer biasing portion 40A is attached to the seating portion 20. When the seat 20 is removed from the lower surface, the seat 20 can be used as a normal chair that does not rotate forward, so the usage of the chair can be diversified.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Standing assistance instrument 10, 10A base 20 Seating part 30 Rail part 40, 40A Buffering biasing part 50 Elastic part 60 Auxiliary elastic part 70, 70A Adjustment part 100 Chair

Claims (5)

A standing / sitting assisting device for assisting a sitting person sitting on an object to be seated,
A pedestal placed on the adherend;
A seating portion on which a side edge on the front side is rotatably attached to the pedestal, and seated by a seated person,
A rail portion provided on an upper surface facing the seating portion of the pedestal and extending in a predetermined direction;
The lower end thereof is connected to the rail portion so as to be slidable and rotatable, and extends upward, and the upper end thereof is rotatably connected to the lower surface of the seat portion facing the pedestal, and extends and contracts by a predetermined distance. A buffer biasing portion that biases in the direction and cushions the force in the contracting direction;
An elastic portion that urges the lower end of the buffer urging portion in a direction to return the lower end when the lower end of the buffer urging portion in the rail portion slides,
The lower end of the buffer urging portion is further lowered after the buffer urging portion is contracted by the predetermined distance as the seating portion rotates according to the seating of the seated person on the seating portion. A standing / sitting assistance device that starts sliding movement on the rail portion against the urging force of the elastic portion as it rotates . When the lower end of the buffer urging portion in the rail portion slides on the rail portion against the urging of the elastic portion, the buffer urging force is formed. The standing / sitting assistance device according to claim 1, further comprising an auxiliary elastic portion that urges the lower end of the portion in a direction to return the lower end.   The standing / sitting assistance device according to claim 2, further comprising an adjustment unit that adjusts a force applied by the elastic part and / or the auxiliary elastic part. In a chair having a seating portion on which a seater sits,
Standing and sitting aids are provided on the seating part,
The standing / sitting aid is:
A pedestal provided in the seating portion;
A seating portion on which a side edge on the front side is rotatably attached to the pedestal, and seated by a seated person,
A rail portion provided on an upper surface facing the seating portion of the pedestal and extending in a predetermined direction;
The lower end thereof is connected to the rail portion so as to be slidable and rotatable, and extends upward, and the upper end thereof is rotatably connected to the lower surface of the seat portion facing the pedestal, and extends and contracts by a predetermined distance. A buffer biasing portion that biases in the direction and cushions the force in the contracting direction;
An elastic portion that urges the lower end of the buffer urging portion in a direction to return the lower end when the lower end of the buffer urging portion in the rail portion slides,
The lower end of the buffer urging portion is further lowered after the buffer urging portion is contracted by the predetermined distance as the seating portion rotates according to the seating of the seated person on the seating portion. The chair which starts the sliding movement on the said rail part which resisted the urging | biasing force of the said elastic part with rotation .   The chair according to claim 4, wherein the buffer urging portion is detachably connected to the lower surface of the seating portion.