Standing-up motion assist system, control method for controller of standing-up motion assist system, storage medium, care belt, and robot

1. A standing-up motion assist system that assists a standing-up motion of a care receiving person, the standing-up motion assist system comprising:

a care belt including

a first holder that holds a neck part or a back part of the care receiving person,

a second holder that holds a lumbar part of the care receiving person,

a third holder that connects the first holder and the second holder and holds armpits of the care receiving person,

a first connector that connects, in front of the care receiving person, the first holder and the second holder, and

a second connector that is located at a chest of the care receiving person;

a pulling mechanism that is connected to the second connector and that pulls the second connector; and

a controller that controls the pulling mechanism such that the pulling mechanism pulls the second connector in a forward and upward direction with reference to the care receiving person, and, thereafter, the pulling mechanism pulls the second connector in a backward and upward direction with reference to the care receiving person.

2. The standing-up motion assist system according to claim 1 , wherein the controller controls the pulling mechanism such that a pulling speed of the pulling mechanism is increased when the pulling mechanism is pulling the second connector in the forward and upward direction with reference to the care receiving person.

3. The standing-up motion assist system according to claim 1 , wherein the first holder holds the neck part, the chest, and sides of a torso in a direction from a back to a front of a body of the care receiving person, and

the second holder holds the back part via the sides of the torso.

4. The standing-up motion assist system according to claim 2 , wherein the first holder holds the neck part, the chest, and sides of a torso in a direction from a back to a front of a body of the care receiving person, and

the second holder holds the back part via the sides of the torso.

5. The standing-up motion assist system according to claim 1 , wherein the pulling mechanism includes a walking mechanism including a pair of front wheels and a pair of back wheels.

6. The standing-up motion assist system according to claim 1 , wherein

the pulling mechanism includes an arm mechanism including a plurality of joints,

and wherein the standing-up motion assist system further includes

a force acquirer that acquires information about a force applied to the arm mechanism from the outside,

a position acquirer that acquires information about a position of the arm mechanism, and

an operation information generator that generates operation information about the arm mechanism from the information about the force acquired by the force acquirer and the information about the position acquired by the position acquirer,

and wherein the controller controls an operation of the arm mechanism based on the operation information generated by the operation information generator.

7. The standing-up motion assist system according to claim 6 , wherein

the operation information generator generates the operation information such that

when the controller is controlling the pulling mechanism so as to pull the second connector in the forward and upward direction with reference to the care receiving person, the operation information generator calculates a difference between a first force at a first time acquired by the force acquirer and a second force at a second time acquired by the force acquirer earlier than the first time,

and in a case where an absolute value of the force, acquired by the force acquirer after a sign of the difference between the first force and the second force is inverted, is equal to or greater than a threshold value, the operation information generator generates the operation information that causes a pulling speed, at which the arm mechanism pulls the second connector in an upward direction, to be increased compared to the pulling speed as of when the sign of the difference is not yet inverted.

8. The standing-up motion assist system according to claim 6 , wherein

the operation information generator generates the operation information such that

when the controller is controlling the pulling mechanism so as to pull the second connector in the forward and upward direction with reference to the care receiving person, the operation information generator calculates a difference between a first force at a first time acquired by the force acquirer and a second force at a second time acquired by the force acquirer earlier than the first time, and

the operation information generator generates the operation information that causes a pulling speed, at which the arm mechanism pulls the second connector in an upward direction, to be increased as an absolute value of the force, acquired by the force acquirer after a sign of the difference between the first force and the second force is inverted, increases.

9. The standing-up motion assist system according to claim 1 , wherein

one of the pulling mechanism and the second connector includes a buckle, and

another one of the pulling mechanism and the second connector includes a buckle receiver,

and wherein the buckle and the buckle receiver are removably connected to each other.

10. A control method for a controller of a standing-up motion assist system, the standing-up motion assist system including

a care belt including

a first holder that holds a neck part or a back part of a care receiving person,

a second holder that holds a lumbar part of the care receiving person,

a third holder that connects the first holder and the second holder and holds armpits of the care receiving person,

a first connector that connects, in front of the care receiving person, the first holder and the second holder, and

a second connector that is located at a chest of the care receiving person,

a pulling mechanism that is connected to the second connector and that pulls the second connector, and

the controller that controls a pulling operation of the pulling mechanism,

the control method comprising:

causing the controller to control the pulling mechanism to pull the second connector in a forward and upward direction with reference to the care receiving person; and

thereafter causing the controller to control the pulling mechanism to pull the second connector in a backward and upward direction with reference to the care receiving person.

11. A non-transitory computer-readable recording medium storing a program for a controller of a standing-up motion assist system, the standing-up motion assist system including

a care belt including

a first holder that holds a neck part or a back part of a care receiving person,

a second holder that holds a lumbar part of the care receiving person,

a third holder that connects the first holder and the second holder and holds armpits of the care receiving person,

a first connector that connects, in front of the care receiving person, the first holder and the second holder, and

a second connector that is located at a chest of the care receiving person,

a pulling mechanism that is connected to the second connector and that pulls the second connector,

the controller that controls a pulling operation of the pulling mechanism,

the program comprising:

causing the controller to control the pulling mechanism to pull the second connector in a forward and upward direction with reference to the care receiving person; and

thereafter causing the controller to control the pulling mechanism to pull the second connector in a backward and upward direction with reference to the care receiving person.