JP2017209548A - Assistance robot - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assistance robot making an assistance receiver stand up or sit down without providing a feeling of discomfort.SOLUTION: An assistance robot 20 is so configured that, in a case of making an assistance receiver M1 stand up, a standup trajectory Tas1 on which a movement control part Ps of the assistance receiver M1 passes is so set as to place a position G of the center of gravity of the assistance receiver M1 within a range A of both foot soles of the assistance receiver from an early time point after starting a standup movement, the movement of making the assistance receiver M1 stand up till a termination time of the standup movement. In a case of making the assistance receiver M1 sit down, a sitdown trajectory Tbs1, the trajectory different from the standup trajectory Tas1, on which the movement control part Ps of the assistance receiver M1 passes is so set as to deviate the position G of the center of gravity of the assistance receiver M1 from the inside of the range A of both foot soles of the assistance receiver M1 and move it to a planned sitdown position side of the assistance receiver M1, from an early time point after starting a sitdown movement, the movement of making the assistance receiver M1 sit down.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an assistance robot that assists the movement of a person being assisted.

  As one type of assistance robot, one disclosed in Patent Document 1 is known. As shown in FIG. 3 of Patent Document 1, in the assistance robot, each extension of the support member 19 in which the movable member 11 moves to the lower limit position with respect to the support portion 7 while the user is sitting. When the electric motor 17 is driven in a predetermined direction by gripping one of the operation handles 21a while sandwiching a side in the protruding portion 19a, the movable member 11 is moved with respect to the support portion 7 by the feed screw 15 rotating in a predetermined direction. Move upward. Thus, the user is lifted and raised by the support member 19 moving upward.

  Then, when the user is raised to a position where each extending portion 19a can be gripped, the user interrupts the grip operation of the operation handle 21a and stops the upward movement of the movable member 11. In this state, the user can walk while moving the traveling member 3 in a desired direction while holding each extending portion 19a.

  Moreover, what is shown by patent document 2 is known as another type of assistance robot. As shown in Patent Document 2, the assistance robot can assist the user and shift between the non-standing position (sitting position) and the standing position.

JP 09-066082 A JP 2012-030077 A

  In the assistance robot described in Patent Document 1 described above, the seated user is lifted and raised by the support member 19 that moves upward. Moreover, in the assistance robot described in Patent Document 2 described above, the user can be assisted to move between the non-standing position and the standing position. However, in both cases, when the person being assisted is erected and seated, the standing locus for raising the person being assisted and the seating locus for being seated may cause the person being assisted to feel uncomfortable.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an assistance robot that stands and sits without giving a sense of discomfort to the person being assisted.

  In order to solve the above problems, an assistance robot according to the present invention is an assistance robot including a holding unit that supports a part of a body of a person being assisted and assists standing and sitting, and is supported by the holding unit. In the case where the person being assisted is erected, the standing locus through which the movement control part of the assisted person passes is the end of the erection operation from an early point after the start point of the erection operation, which is an operation to erect the person being assisted. Up until the point of time, the position of the center of gravity of the person being assisted is set to be within the range of the back of both feet of the person being assisted. The seating trajectory that is different from the trajectory and through which the movement control part of the person being assisted passes is that the centroid position of the person being assisted is from the earliest time after the start of the seating movement, which is the movement of the person being assisted. Range of soles of both feet Characterized in that the off-set to move the seating plan position side of the care receiver.

It is a schematic diagram which shows the outline | summary of the care center where the assistance robot is arrange | positioned about one Embodiment of the assistance robot by this invention. It is a right view which shows the assistance robot shown in FIG. It is a top view which shows the assistance robot shown in FIG. It is a right view which shows the outline | summary of the internal structure of the assistance robot in the expansion | extension state shown in FIG. It is a front view which shows the periphery containing the 1st slide part shown to FIG. 4a. It is a right view which shows the outline | summary of the internal structure of the assistance robot in the contracted state shown in FIG. FIG. 5b is an end view taken along line 5b-5b shown in FIG. 5a. It is a front view which shows the periphery containing the 1st slide part shown to FIG. 5a. It is a block diagram which shows the assistance robot shown in FIG. It is a block diagram which shows the control apparatus shown in FIG. It is a side view which shows a mode that the assistance robot is supporting the person who is sitting. It is a side view which shows a mode that the assistance robot is supporting the person who is standing. It is a figure which shows standing motion in the left half and shows seating motion in the right half. It is a figure which shows standing-up operation | movement. It is a figure which shows a seating operation | movement. It is a table | surface which shows the relationship between XY coordinate and a robot coordinate. It is a side view which shows typically the length and angle of a robot arm part. It is a figure which shows the area according to the body part which a care recipient wants to train among several areas of a standing locus | trajectory (for example, reference | standard standing locus). It is a figure which shows the reference | standard standing locus | trajectory by the reference data for standing locus | trajectory, the standing locus | trajectory for the upper body which wants to train the upper body for the upper body, and the standing locus for the lower body by the data for the standing body for the lower body which wants to train the lower body. It is a figure which shows an example of other seating operation | movement.

  Hereinafter, an embodiment of an assistance robot according to the present invention will be described. FIG. 1 is a schematic diagram showing an outline of a care center 10 in which the assistance robot 20 is arranged. The care center 10 is provided with a station 11, a training room 12, and individual rooms 13a to 13d. The care center 10 is a living area where people live. A person existing in the care center 10 is a person M1 who needs assistance or a person M2 who helps the person M1.

  As shown in FIG. 1, the station 11 is a place where the assistant M2 is packed, and is a base where the assistant robot 20 stands by or is charged. The assistance robot 20 is allowed to move in a living area where a person lives, and moves in the living area by driving by left and right driving wheel motors 21g and 21h as driving sources. The training room 12 is a room where the person being assisted M1 performs training and rehabilitation. Each of the private rooms 13a to 13d is a room in which the person being assisted M1 lives.

  The station 11, the training room 12, and the individual rooms 13a to 13d are provided with entrances and exits 11a, 12a, and 13a1 to 13d1, respectively, and the entrances and exits 11a, 12a, and 13a1 to 13d1 are connected through a passage 14. . In FIG. 1, an arrow in the vicinity of the assisting robot 20 indicates the traveling direction of the assisting robot 20.

  The assistance robot 20 is an assistance robot that supports a part of the body of the person being assisted M1 (for example, the upper body, particularly the chest) to assist in standing and sitting. As shown in FIGS. 2 and 3, the assistance robot 20 includes a base 21, a robot arm unit 22, a holding unit 23, a handle 24, an operation device 25, and a control device 26.

The base 21 includes left and right base portions 21a and 21b and left and right leg portions 21c and 21d. The left and right base portions 21a and 21b are disposed at a predetermined distance in the left and right direction. The left and right base portions 21a and 21b are provided with left and right drive wheels 21e and 21f, respectively, and drive the left and right drive wheels 21e and 21f, respectively. The left and right drive wheel motors 21g and 21h (drive sources) are incorporated. The assistance robot 20 travels by left and right drive wheels 21e and 21f driven by left and right drive wheel motors 21g and 21h (drive sources), respectively.
Note that the drive source provided on the base 21 may be omitted and configured to be moved by being pushed by the user.

  The left and right leg portions 21c and 21d extend horizontally from the left and right base portions 21a and 21b in the forward direction (left direction in FIGS. 2 and 3). Left and right driven wheels 21i and 21j are provided at the distal ends of the left and right leg portions 21c and 21d, respectively. A pair of collision prevention sensors 21k and 21l are provided at the ends of the left and right leg portions 21c and 21d, respectively. The collision prevention sensors 21k and 21l are sensors that detect obstacles, and the detection signals thereof are transmitted to the control device 26.

  The robot arm portion 22 has a base portion attached to a base 21 and mainly includes first and second rotation motors 22a1c and 22b3 and a slide motor 22a2b as shown in FIGS. 4a and 5a. A plurality of arms 22a, 22b, and 22c that can be moved relative to each other by the drive unit. The robot arm unit 22 may be configured from a plurality of axes. In this case, the shaft may include at least one of the rotation shaft and the slide shaft.

  As shown in FIGS. 4 a and 4 b and FIGS. 5 a to 5 c, the base portion of the first arm 22 a is attached to the base 21. The first arm 22a includes a slide base 22a1, a first slide 22a2, and a second slide 22a3.

  As shown in FIGS. 2 and 3, the slide base 22a1 is formed in a substantially rectangular parallelepiped shape. The slide base portion 22a1 includes a frame 22a1b whose base end portion is attached to the base 21 so as to be rotatable around the first rotation shaft 22a1a. The frame 22a1b is formed in a substantially U-shaped cross section, and is a rear plate having left and right ends connected to upper rear ends of left and right plate members 22a1b1, 22a1b2 and left and right plate members 22a1b1, 22a1b2 formed by bending. It is comprised from member 22a1b3.

  The first rotation motor 22 a 1 c is provided on the base 21. The first drive belt 22a1d is mounted between the pulley of the first rotation motor 22a1c and the pulley of the first rotation shaft 22a1a. When the first rotation motor 22a1c is driven, the frame 22a1b, that is, the slide base portion 22a1, rotates forward or backward around the first rotation shaft 22a1a.

  As shown in FIG. 5b, inside the frame 22a1b (inside the left and right plate-like members 22a1b1 and 22a1b2), it is slidably engaged with the left and right ends of the rear plate-like member 22a2a2 of the frame 22a2a of the first slide portion 22a2 described later. Right and left guide grooves 22a1e are formed. On the upper part of the left plate-like member 22a1b1 of the frame 22a1b, there is provided a fixing portion 22a1f that is attached and fixed to a slide belt 22a2e described later (see FIGS. 4b and 5c).

  As shown in FIGS. 2 and 3, the first slide portion 22a2 is formed in a substantially rectangular parallelepiped shape, and is configured to be smaller than the slide base portion 22a1. The first slide portion 22a2 slides in the longitudinal direction (axial movement direction) with respect to the slide base portion 22a1, and is configured to be substantially accommodated in the slide base portion 22a1 when contracted.

  Specifically, the first slide portion 22a2 includes a frame 22a2a. As shown in FIG. 5b, the frame 22a2a is formed in an H-shaped cross section and an H-shaped side view, and the front and rear plate-like members 22a2a1, 22a2a2 and the front-rear plate-like members 22a2a1, 22a2a2 It is comprised from the connection plate-shaped member 22a2a3 to which both ends were connected. The left and right ends of the rear plate member 22a2a2 are slidably engaged with the left and right guide grooves 22a1e of the frame 22a1b. As shown mainly in FIG. 4a, a slide motor 22a2b is provided above the rear plate member 22a2a2. A pulley 22a2c is rotatably provided below the rear plate member 22a2a2. A slide belt 22a2e is mounted between the pulley 22a2d and the pulley 22a2c of the slide motor 22a2b.

  Guide rails 22a2f are provided at the left and right ends of the front plate-like member 22a2a1 of the frame 22a2a. The guide rail 22a2f is slidably engaged with the left and right guide receiving portions 22a3b inside the left and right plate-like members of the frame 22a3a of the second slide portion 22a3 which will be described later.

  As shown in FIGS. 2 and 3, the second slide portion 22a3 is formed in a substantially rectangular parallelepiped shape, and is configured to be smaller than the first slide portion 22a2. The second slide portion 22a3 slides in the longitudinal direction (axial movement direction) with respect to the first slide portion 22a2, and is configured to be substantially accommodated in the first slide portion 22a2 when contracted. Yes.

  Specifically, the second slide portion 22a3 includes a frame 22a3a. As shown in FIG. 5b, the frame 22a3a has a substantially U-shaped cross section. The front plate has left and right ends connected to the front end portions of the left and right plate members 22a3a1, 22a3a2 and the left and right plate members 22a3a1, 22a3a2. It is comprised from the shape member 22a3a3. On the inner side of the frame 22a3a (inner wall surfaces of the left and right plate members 22a3a1, 22a3a2), left and right guide receiving portions 22a3b that are slidably engaged with the guide rails 22a2f of the frame 22a2a are provided. A fixing portion 22a3c attached to and fixed to the sliding belt 22a2e is provided at the lower part of the right plate member 22a3a2 of the frame 22a3a (see FIGS. 4b and 5c).

  When the slide motor 22a2b is driven, the frame 22a2a of the first slide portion 22a2 extends along the axial direction with respect to the frame 22a1a of the slide base 22a1 (expanded state shown in FIGS. 4a and 4b). At the same time, the frame 22a3a of the second slide portion 22a3 extends relative to the frame 22a2a of the first slide portion 22a2 (the extended state shown in FIGS. 4 and 4b).

  On the other hand, when the slide motor 22a2b is driven in the reverse direction, the frame 22a2a of the first slide portion 22a2 contracts along the axial direction with respect to the frame 22a1a of the slide base 22a1 (the contracted state shown in FIGS. 5a and 5c). ). At the same time, the frame 22a3a of the second slide portion 22a3 contracts with respect to the frame 22a2a of the first slide portion 22a2 (the contracted state shown in FIGS. 5a and 5c).

  As shown in FIGS. 2 and 3, the second arm 22 b is formed in a substantially rectangular parallelepiped shape, and is formed at the distal end portion of the second slide portion 22 a 3 so as to extend in a direction orthogonal to the longitudinal direction (forward direction). Has been. Specifically, as shown mainly in FIG. 4a, the second arm 22b includes a frame 22b1 composed of left and right plate-like members 22b1a and 22b1b. The rear ends of the left and right plate members 22b1a and 22b1b of the frame 22b1 are connected and fixed to the upper ends of the left and right plate members 22a3a1 and 22a3a2 of the frame 22a3a, respectively.

  A second rotating shaft 22b2 is turnably interposed at the distal ends of the left and right plate-like members 22b1a and 22b1b of the frame 22b1. A second rotation motor 22b3 is provided at the center of the left and right plate-like members 22b1a and 22b1b. The second rotating belt 22b4 is mounted between the pulley of the second rotating motor 22b3 and the pulley of the second rotating shaft 22b2.

The third arm 22c is formed in a substantially rectangular parallelepiped shape, and a base end portion thereof is attached to a distal end portion of the second arm 22b so as to be rotatable around the second rotation shaft 22b2. Specifically, the third arm 22c includes a frame 22c2. The rear end of the frame 22c2 is fixed so as to rotate integrally with the second rotation shaft 22b2. The front end portion of the frame 22c2 is fixed to the rear end of the holding portion 23.
When the second rotation motor 22b3 is driven, the frame 22c2, that is, the third arm 22c rotates upward or downward around the second rotation shaft 22b2.

  The holding part 23 is fixed to the tip of the third arm 22c. The holding unit 23 supports a part of the body of the person being assisted M1 (for example, the upper body, particularly the chest) and assists standing and sitting. The holding part 23 is a member that supports both arms (both sides) from the lower side when facing the person being assisted M1 in the standing and sitting movements of the person being assisted, for example, toward the front. It is formed in a substantially U shape in plan view that opens. The holding portion 23 is formed of, for example, a relatively soft material on the premise that the holding portion 23 contacts the person being assisted.

  The handle 24 is fixed to the upper surface of the third arm 22c. The handle 24 is composed of a pair of left and right bar-shaped handles, and is gripped by the left and right hands of the person being assisted M1. The handle 24 is provided with contact sensors 24a and 24b that detect gripping. The handle 24 is provided with a left turn switch 24c for turning the assistance robot 20 to the left and a right turn switch 24d for turning the assistance robot 20 to the right. Further, the handle 24 is provided with a stop switch 24e for stopping the assisting robot 20.

  In addition, the third arm 22c receives from the person being assisted M1 when walking while the person being assisted M1 is supported by the holding unit 23 or when the person being assisted is holding the handle 24. A load sensor 22c1 for detecting the force received is provided. The load sensor 22c1 detects a strain amount of the strain generating body that changes due to a change in load as a voltage change, or when pressure is applied to the silicon chip, the gauge resistance changes according to the deflection and is converted into an electric signal. For example, a semiconductor pressure sensor.

  The operation device 25 includes a display unit 25a that displays an image, and an operation unit 25b that receives an input operation from a user (an assistant M2 or an assistant M1). The operation device 25 is a selection operation unit that selects one form type from among a plurality of form types (described later) corresponding to the plurality of movement postures of the person being assisted M1.

  The display unit 25a is configured by a liquid crystal display, and displays an operation mode selection screen of the assistance robot 20 and the like. As the operation mode, a standing operation assist mode for assisting the user's standing operation, a seating operation assist mode for assisting the user's seating operation, and the like are set. Also, each mode corresponding to the body part that the user wants to train is set in the standing motion assist mode. For example, these modes include an upper body mode for training the upper body, particularly the back muscles, and a lower body mode for training the lower body, particularly the lower limbs.

  The operation unit 25b includes a cursor key for moving the cursor up / down / left / right, a cancel key for canceling input, a determination key for determining selection contents, and the like, and is configured to allow a user to input an instruction. The operation device 25 includes a display function of the display unit 25a and an input function of the operation unit 25b, and may be configured by a touch panel that operates the device by pressing a display on the screen.

  When the storage device 27 (storage unit) stands up the person being assisted M1 (see FIG. 8) seated while being supported by the holding part 23, for example, the shoulder position Ps that is a movement control part of the person assisted by M1 is In the case where the standing locus reference data indicating the standing locus to pass and the person to be assisted M1 standing up supported by the holding portion 23 (see FIG. 9) are seated, the locus is different from the standing locus and the person being assisted. The seating locus reference data indicating the seating locus through which the shoulder position Ps of M1 passes is stored.

  As shown in FIG. 10, the standing locus Tas <b> 1 indicates that the center of gravity position G of the person being assisted M <b> 1 is between the early time after the start time of the standing motion that is the motion to raise the assisted person M <b> 1 and the end time of the standing motion. It is set so that it exists in the range A of the back of both feet of the person being assisted M1. The locus of the gravity center position G is represented by Tg1.

  As shown in FIG. 10, the seating locus Tbs1 indicates that the center of gravity position G of the person being assisted M1 is on the back of both feet of the person being assisted by M1 from an early time after the start of the seating movement, which is an action to seat the person being assisted. It is set so as to move out of the range A and move toward the planned sitting position of the person being assisted M1. The seating locus Tbs1 is set to be positioned above the standing locus Tas1. The locus of the gravity center position G is represented by Tg2.

  The standing trajectory Tas1 and the seating trajectory Tbs1 may be created based on the two-dimensional coordinates (for example, xy coordinates) of the shoulder position Ps obtained by actually photographing the standing motion of the healthy person. The standing locus is shown in FIG. The standing motion is shown stepwise from the upper left (sitting state) to the lower right (standing state). The second state (middle of the upper stage) shows an early time point after the start time of the standing-up operation, and is a time point when the seated person M1 leans forward and the waist of the person M1 rises. From the second to the end point of the standing motion (sixth), the center-of-gravity position G of the person being assisted M1 is within the range A on the soles of both feet of the person being assisted.

A seating locus is shown in FIG. The sitting operation is shown stepwise from the upper left (standing state) to the lower right (sitting state). In the second state (middle of the upper stage), an earlier time point after the start time of the seating operation is shown, and the standing person M1 sits down and the center of gravity G of the person M1 is the person M1. It is the time of having gone out of the range A of the backs of both feet. From the second to the end point of the sitting operation (fifth), the center of gravity position G of the person being assisted is out of the range A of the back of both feet of the person being assisted M1 and the person who is to be assisted by the person sitting by the person M1 (illustrated) Move to the chair side.
Note that the above-described standing trajectory and seating trajectory may be created by simulation.

  Each trajectory reference data is formed by two-dimensional coordinates. The standing locus reference data is represented by (Xa1, Ya1),..., (Xan, Yan), for example, in xy coordinates, and is composed of n pieces. The reference data for the seating locus is represented by (Xb1, Yb1),..., (Xbn, Ybn), for example, in xy coordinates, and consists of n pieces. The origin may be the reference point of the assistance robot 20, the coordinates of the first rotation shaft 22a1a, the coordinates of the sitting state, or any point on the seating surface of the person being assisted M1. .

  The trajectory reference data is preferably configured by adding the angle α of the holding unit 23 at each coordinate to the xy coordinates. The angle α of the holding portion 23 at each coordinate is an angle of the holding portion 23 at each point of the standing locus Tas1 and the seating locus Tbs1 (see FIG. 11). This angle α is an angle formed between the upper body of the person being assisted M1 (the inner wall surface in contact with the person being assisted by the person being assisted by the holding unit 23) and the horizontal plane. For example, as shown in FIG. 11, the angle α is 90 degrees when in a sitting state or a standing state. The trajectory reference data is represented by (Xa1, Ya1, α1),..., (Xan, Yan, αn), for example.

  In addition, you may make it form with a robot coordinate instead of a two-dimensional coordinate. In this case, for example, as shown in FIG. 13, the reference data for the standing locus includes a first angle (θa) that is a rotation angle of the first rotation motor 22a1c, and an arm length (L: slide amount) of the slide motor 22a2b. : A rotation angle corresponding to this arm length) and a second angle (θb) which is the rotation angle of the second rotation motor 22b3. The coordinates (Xa1, Ya1, α1) obtained by adding the angle α to the XY coordinates are represented by robot coordinates (θa1, L1, θb1).

  A method for calculating the robot coordinates (θa1, L1, θb1) from the coordinates (Xa1, Ya1, α1) obtained by adding the angle α to the XY coordinates will be briefly described. FIG. 14 is a side view schematically showing the length and angle of the robot arm unit 22. As shown in FIG. 14, the length of the first arm 22a is La (variable), the length of the second arm 22b is Lb (fixed), and the third arm 22c extends from the second rotation shaft 22b1 to the shoulder position Ps. The length along the installation direction is Lc (fixed) and the length along the direction perpendicular to the extending direction is Ld (fixed). Further, the angle formed by the first arm 22a and the horizontal line is the first angle θa, the angle formed by the first arm 22a and the second arm 22b is 90 degrees, and the angle formed by the second arm 22b and the third arm 22c. The second angle is θb.

  The XY coordinates of the point P1 where the first arm 22a and the second arm 22b are orthogonal to each other are (La × (cos θa), La × (sin θa)). The XY coordinates of the point P2 which is the second rotation axis 22b1 are obtained by adding (Lb × (sin θa), Lb × (cos θa)) to the point P1. The XY coordinates of the point P3, which is the foot of the perpendicular line dropped from the shoulder position Ps to the third arm 22c, are (Lc × (cos (π / 2−θa−θb), Lc × (sin (π / 2−θa−θb)) The XY coordinates (Xa1, Ya1) of the shoulder position Ps, that is, the point P4, are (Ld × (cos (θa + θb), Ld × (sin (θa + θb)) with respect to the point P3. Note that the angle α of the holding unit 23 at each coordinate is represented by π− (π / 2 + (π / 2−θa−θb)), and thus α = θa + θb. From the above, the robot coordinates (θa1, L1, θb1) are calculated from the coordinates (Xa1, Ya1, α1) obtained by adding the angle α to the XY coordinates.

  In the robot coordinates, as shown in FIG. 13, the first angular velocity (ωa) that is the angular velocity of the first angle (θa) that is the rotational angle of the first rotation motor 22a1c, and the sliding velocity (V : A rotational angular velocity corresponding to the sliding speed) and a second angular velocity (ωb) that is an angular velocity of the second angle (θb) that is the rotational angle of the second rotation motor 22b3.

  At this time, by appropriately setting these speeds, the speed of the holding unit 23 in the case where the person to be assisted M1 seated supported by the holding unit 23 is erected, and the standing by being supported by the holding unit 23 are raised. The speed of the holding part 23 when the person being assisted M1 is seated can be made different.

  Further, when the person to be assisted M1 seated while being supported by the holding portion 23 is erected by appropriately setting these speeds, a plurality of erection trajectories (for example, a reference erection trajectory) are provided as shown in FIG. In the section corresponding to the body part that the person being assisted M1 wants to train, the speed of the holding unit 23 can be made to be a speed corresponding to the burden on the person assisted M1. In the first section B1 and the third section B1, the burden on the upper body, particularly the back muscles, increases, and in the second section B2, the burden on the lower body, particularly the thigh muscles, increases. This is because the first section B1 is a section that leans forward, the second section B2 is a section that starts rising, and the third section B3 is a section that has risen to some extent and uses the upper body. Because. When the passing speed of each section is slow, the posture needs to be maintained longer than when the passing speed is fast, and thus the load on the person being assisted M1 increases.

  The storage device 27 further stores a plurality of standing locus data in addition to the standing locus reference data. These standing locus data are a plurality of pieces of data indicating a different locus from the standing locus (reference standing locus) corresponding to the standing locus reference data, and for training a plurality of different body parts of the person being assisted M1, respectively. It is. FIG. 16 shows the trajectories based on the standing trajectory data. The standard standing locus based on the standing locus reference data is indicated by a solid line, the upper body standing locus for the upper body for which the upper body, especially the back muscles is to be trained, is indicated by a dashed line, and the lower body, particularly the lower body for the lower limbs, for which the lower limb is to be trained. The standing locus for the lower body is indicated by a broken line.

  When assisting along the standing locus for the upper body, the forward lean amount of the person being assisted M1 increases as compared to the reference standing locus, and thus the amount of use (load) of the back muscles increases compared to the lower limbs. This can increase the load on the upper body, particularly the back muscles. In addition, when assisted along the lower-body standing locus, the amount of forward leaning of the person being assisted M1 is reduced compared to the reference standing locus, so that the amount of muscle used (load) of the lower limbs is increased compared to the back muscles. . This can increase the load on the lower body, particularly the lower limbs.

  Further, the storage device 27 stores a correction amount (first correction amount) corresponding to the height of a seating portion such as a chair or a bed on which the person M1 is seated. The first correction amount is a value for correcting each data described above. Each of the data described above is data when the height of the seating portion is a predetermined value (for example, 40 cm).

For example, when the height of the seating portion is + Δh1, the first correction amount for the first angle θa is −Δψa1, the first correction amount for the arm length L is + ΔLb1, and the second angle θb. The first correction amount is + Δψb1. When the height is -Δh1, the first correction amount for the first angle θa is + Δψa1, the first correction amount for the arm length L is -ΔLb1, and the second angle θb is the first correction amount. The correction amount of 1 is + Δψb1. A first correction amount is stored for each predetermined difference from the predetermined value.
These correction amounts are set in advance based on data obtained by experiments using an actual machine or the like so as to have an appropriate form according to the height of the seating portion.

  The storage device 27 stores a correction amount (second correction amount) corresponding to the height of the person being assisted M1. This second correction amount is a value for correcting each data described above. Each of the data described above is data when the height of the person being assisted M1 is a predetermined value (for example, an average height or the like, specifically, 170 cm).

For example, when the height is + ΔH1, the second correction amount for the first angle θa is −Δφa1, the second correction amount for the arm length L is + ΔLb1, and the second angle θb is the second correction amount. The correction amount is + Δφb1. When the height is −ΔH1, the second correction amount is + Δφa1 for the first angle θa, the second correction amount is −ΔLb1 for the arm length L, and the second angle θb is the second correction amount. The correction amount of 2 is + Δφb1. A second correction amount is stored for each predetermined difference from the predetermined value.
These correction amounts are set in advance based on data obtained through experiments using actual machines so that each form type has an appropriate form according to height.
Each correction amount described above is stored as a map, but may be stored as an arithmetic expression.

  The control device 26 performs control related to traveling and posture deformation of the assisting robot 20. As shown in FIG. 6, the control device 26 includes the above-described collision prevention sensors 21k and 21l, knee sensors 22a1d, load sensors 22c1, contact sensors 24a and 24b, a left turn switch 24c, a right turn switch 24d, a stop switch 24e, The left and right drive wheel motors 21g and 21h, the first rotation motor 22a1c, the slide motor 22a2b, the second rotation motor 22b3, the operation device 25, the storage device 27, the imaging device 28, and the guide device 29 are connected. The control device 26 includes a microcomputer (not shown), and the microcomputer includes an input / output interface, a CPU, a RAM, and a ROM (all not shown) connected via a bus.

  As shown in FIG. 7, the control device 26 includes a reference data acquisition unit 26a, a height / chair height acquisition unit 26b, a correction unit 26c, and a drive control unit 26d. The reference data acquisition unit 26a acquires the standing motion assist mode (any one of the normal mode, the upper body mode, and the lower body mode) selected by the operation device 25, and acquires data according to the acquired mode from the storage device 27. To do. In the upper body mode, the upper body standing locus data is acquired.In the lower body mode, the lower body standing locus data is acquired.In the normal mode that is neither the upper body mode nor the lower body mode, the standing body locus data is acquired. Get reference data. Further, the reference data acquisition unit 26a also acquires the sitting motion assist mode selected by the operation device 25.

  The height / chair height acquisition unit 26b acquires the height of the person being assisted M1 selected by the operation device 25 and the height of the seating part such as a chair or a bed on which the person assisted M1 is seated. The correction unit 26c corrects the data acquired by the reference data acquisition unit 26a based on the height and height of the seating unit acquired by the height and chair height acquisition unit 26b. Specifically, the correction unit 26c acquires a second correction amount according to the acquired height and a first correction amount according to the height of the seating portion from the storage device 27. The correction unit 26c corrects the data acquired by the reference data acquisition unit 26a with the acquired correction amounts.

  The drive control unit 26d drives the drive unit including the first and second rotation motors 22a1c and 22b3 and the slide motor 22a2b to make the robot arm unit 22 stand up locus reference data (or upper body standing up). The standing motion is driven based on the locus data or the lower body standing locus data. The drive control unit 26d drives the drive unit to drive the robot arm unit 22 based on the seating locus reference data. Specifically, the drive control unit 26 d reads the data acquired by the reference data acquisition unit 26 a from the storage device 27. Then, the drive control unit 26d drives the drive unit so that the read data is obtained.

In addition, when the control device 26 (drive control unit 26d) also stores the angle α of the holding unit 23 at each point of the standing locus and the seating locus in each of the above data, it drives the drive unit. The angle of the holding portion at each point is controlled to be the angle stored in each standing locus reference data and each seating locus reference data.
In addition, when the control device 26 (drive control unit 26d) stands up the assisted person M1 sitting supported by the holding unit 23, the assisted person M1 acquired by the reference data acquisition unit 26a is trained. The robot arm unit 22 is driven based on the data corresponding to the body part desired.
Further, the control device 26 (drive control unit 26d) stands up supported by the holding unit 23 and the speed of the holding unit 23 when the person M1 seated supported by the holding unit 23 stands up. It controls so that the speed of the holding | maintenance part 23 in the case of seating the person M1 who is sitting is different.
Further, when the control device 26 (drive control unit 26d) erects the person being assisted by the holding unit 23 and is sitting, the body part that the person M1 wants to train among a plurality of sections of the standing locus In the section according to the above, the speed of the drive unit is controlled so that the speed of the holding unit 23 becomes a speed according to the burden on the person being assisted M1.
Further, the control device 26 (drive control unit 26d) adjusts the standing locus and the sitting locus of the robot arm unit 22 according to the height of the person being assisted M1 and the height of the sitting portion, respectively.

  Next, the operation of the assistance robot 20 configured as described above will be described. First, the movement of the assistance robot 20 will be described. The case where the assistance robot 20 moves independently from the station 11 to the individual rooms 13a to 13d (or from the individual rooms 13a to 13d to the station 11) will be described. When moving along the passage 14 from the station 11 to each of the individual rooms 13a to 13d, the assistance robot 20 is a route from the entrance / exit 11a of the station 11 to each of the entrances / exits 13a1 to 13d1 of the individual rooms 13a to 13d. It moves along the route stored in the storage device 27.

  The assistance robot 20 reads the guide mark 14a provided in the passage 14 via the imaging device 28, calculates the remaining journey from the information, and moves based on the result. The guide mark 14a is, for example, a two-dimensional barcode. The two-dimensional barcode includes the current point (for example, the intersection of the passage 14), the distance and direction from the current point to the destination (for example, the passage when the assisting robot 20 moves from the station 11 to the first private room 13a). Information such as the distance and direction (left turn) from the intersection to the first private room 13a when 14 intersections are reached is described. The guide mark 14a is provided at a corner of the entrance / exit 11a of the station 11, each of the entrances / exits 13a1 to 13d1 of the individual rooms 13a to 13d, and a predetermined portion of the passage 14 (for example, a corner of an intersection or a ceiling surface).

  Next, the case where the assistance robot 20 is approaching the person being assisted M1 who is seated will be described. At this time, the assistance robot 20 enters the first private room 13a through the entrance / exit 13a1 of the first private room 13a, and then approaches the person M1 sitting on the bedside. The assistance robot 20 moves forward with the front surface of the assistance robot 20 in the traveling direction. The assistance robot 20 reads the guidance mark 14b provided in the vicinity of the person being assisted M1 through the front imaging device 28, and approaches the person assisted by M1 based on the information.

  Further, the standing operation and the seating operation of the assistance robot 20 will be described with reference to FIGS. The assistance robot 20 uses a detection result of the knee sensor 22a1d (a distance between the assistance robot 20 and the knee of the person being assisted M1), and a predetermined position at which the distance from the sitting person M1 is a predetermined distance. Move up. This predetermined position is an optimum position (an optimum standing position) for raising the person being assisted M1.

  Then, the assistance robot 20 provides guidance to the person being assisted with “hold the handle”. When the person being assisted M1 grasps the handle 24 with both hands, the assistance robot 20 performs an erection operation to erect the person to be assisted M1 in order to detect that the person has grasped the handle 24 by the contact sensors 24a and 24b.

  When the standing-up operation is started, the assistance robot 20 holds the upper half of the sitting person M1 by the holding unit 23 (see FIG. 8). Then, the assistance robot 20 raises the person being assisted M1 while holding the upper body (see FIG. 9). More specifically, as shown in FIG. 10, the standing operation is performed along the reference standing locus.

  The assistance robot 20 assists the person being assisted M1 in the standing state. The person being assisted M1 walks and moves while the armpit is held by the holding unit 23. As described above, when the assistance robot 20 that assists the walking of the person being assisted M1 moves from the first private room 13a to the training room 12, as in the case where the assistance robot 20 moves alone as described above, It moves along the stored route, or moves by reading the guide mark 14a with the imaging device 28.

  The assistance robot 20 turns right at the entrance / exit 13a1 of the first private room 13a, exits the passage 14, turns right at the intersection of the passage 14, turns left at the entrance / exit 12a of the training room 12, and enters the training room 12. The assistance robot 20 moves forward with the back surface of the assistance robot 20 in the traveling direction.

  In addition, when the sitting robot 20 starts the sitting operation for seating the person being assisted M1, the assisting robot 20 holds the person M1 (see FIG. 9) in an upright state by holding the upper body of the person being assisted by the holding unit 23. The seat is held in the held state (see FIG. 8). More specifically, as shown in FIG. 10, a seating operation is performed along the seating locus.

  Then, when the sitting operation is completed, the assistance robot 20 provides guidance to the person being assisted, “Please let go of the handle”. When the person being assisted M1 releases his hand from the handle 24, the assistance robot 20 moves away from the person being assisted M1 in order to detect that his / her hand has been released from the handle 24 by the contact sensors 24a and 24b.

  According to the present embodiment, the assistance robot 20 is an assistance robot that includes the holding unit 23 that supports a part of the body of the person being assisted M1 and assists standing and sitting, and is supported by the holding unit 23 and is seated. In the case where the person being assisted M1 is erected, the standing locus through which the movement control part (for example, the shoulder position Ps) of the person assisted M1 passes is after the start time of the erection operation, which is an operation to erect the person assisted M1. The center of gravity position G of the person being assisted M1 is set so as to be within the range A on the soles of both feet of the person being assisted during the period from the early point of time to the end of the standing motion, and is supported by the holding portion 23 to stand up. In the case where the person being assisted is seated, the seating locus that is different from the standing locus and through which the movement control part of the person being assisted passes is the start of the seating operation, which is the operation for seating the person being assisted After Center-of-gravity position G of the care receiver is configured to move the seating plan position side of the care receiver M1 deviates from the back of the range A of both feet of the care receiver M1 from an earlier time.

  As a result, when the person being assisted stands up so that the movement control part (for example, the shoulder position Ps) of the person being assisted is along the standing locus, the center of gravity position G is erected as in the case where the normal person is standing. It enters the range A on the soles of both feet from the beginning of the start, and enters the range A after that until the end of the standing motion. Therefore, the person being assisted M1 is assisted in standing up with the same feeling (feeling) as when standing without assistance. Therefore, it can stand up without giving discomfort to the person being assisted M1.

  On the other hand, when the person being assisted is seated so that the movement control part of the person being assisted is along the locus of seating, the center of gravity position G is determined from the time when both the legs start from the beginning of the seating operation, as in the case where the normal person is seated. After moving out of the range A on the back side, the person moves to the planned sitting position (for example, the seating portion) of the person being assisted. Therefore, the person being assisted M1 is assisted in the seating with the same feeling (feeling) as when sitting without assistance. Therefore, the person being assisted can be seated without feeling uncomfortable.

  In addition, the earlier time point after the start time of the standing motion in the standing locus described above is a time point when the seated person M1 leans forward and the waist of the person M1 rises (see the upper center of FIG. 11). As a result, the seated person M1 leans forward and the waist of the person M1 is lifted up to the end of the standing-up operation, so that the person M1 can stand up more reliably without feeling uncomfortable. Can be made.

  The assisting robot 20 is an assisting robot including a holding unit 23 that supports a part (chest) of the person being assisted M1 and assists standing and sitting, and is provided on the base 21 and the base 21. A robot arm portion 22 having a plurality of arms 22a, 22b, and 22c that can be moved relative to each other by a drive portion, a holding portion 23 that is provided at the tip of the robot arm portion 22 and supports a person being assisted, and a holding portion In the case where the person being assisted is seated while being erected, the standing locus reference data indicating the erection locus through which the movement control part of the person being assisted passes, and the holder 23 is erected. In the case where the person being assisted is seated, the memory that stores the reference data for the seating locus that is different from the standing locus and that indicates the seating locus through which the movement control part of the person being assisted passes. And location 27 (storage unit), a driving unit is driven, and a driving control unit 26d that drives based on the robot arm portion 22 to the reference data and the seating track reference data for upright trajectory.

  According to this, since it becomes easy to set the reference data for the standing locus to data corresponding to the standing locus of the healthy person, the movement control part (for example, the shoulder position) of the person being assisted is along the standing locus. When the person to be assisted M1 is erected, the robot arm unit 22 can be driven based on the reference data for the erection locus corresponding to the erection locus of the healthy person. Therefore, the person being assisted M1 is assisted in standing up with the same feeling (feeling) as when standing without assistance. Therefore, it can stand up without giving discomfort to the person being assisted M1.

  On the other hand, the sitting locus of a healthy person is generally different from the standing locus, but it becomes easy to set the reference data for the sitting locus so that the data corresponds to the sitting locus of the healthy person. When the person to be assisted M1 stands up so that the movement control part of M1 follows the seating locus, the robot arm unit 22 can be driven based on the seating locus reference data corresponding to the seating locus of the healthy person. Therefore, the person being assisted M1 is assisted in the seating with the same feeling (feeling) as when sitting without assistance. Therefore, the person being assisted can be seated without feeling uncomfortable.

  The driving device further includes a correction unit 26c that corrects the standing locus reference data and the seating locus reference data according to at least one of the height of the person being assisted M1 and the height of the seating portion on which the person being assisted is seated. The control unit 26d drives the drive unit to drive the robot arm unit 22 based on the standing locus reference data and the sitting locus reference data corrected by the correction unit 26c. Thereby, even if the height of the person being assisted M1 and the height of the seating portion are different, the person being assisted M1 can be erected and seated along an appropriate rising locus and sitting locus.

  The standing locus reference data and the sitting locus reference data also store the angle α of the holding portion 23 at each point of the standing locus and the sitting locus, and the drive control unit 26d (26) The angle α of the holding unit 23 at each point is controlled so as to be the angle stored in each standing locus reference data and each seating locus reference data. Thereby, the angle of the movement control part (shoulder position) of the person being assisted in conjunction with the holding unit 23 can be set optimally at each position of the standing locus and the seating locus, so that more comfortable (natural) The assisted person M1 can be erected or seated.

  In addition, the storage device 27 (storage unit) is a plurality of pieces of data indicating a different locus from the standing locus corresponding to the standing locus reference data, and a plurality of different body parts for the person being assisted M1 are trained. Further, standing-up locus data is further stored, and an acquisition unit 26a that acquires data corresponding to the body part that the care recipient M1 wants to train from a plurality of standing-up locus data is further provided. The drive control unit 26d includes the holding unit 23. The robot arm unit 22 is driven based on the data acquired by the acquisition unit 26a when the person being assisted is erected. Thus, by selecting the standing locus corresponding to the body part that the person being assisted M1 wants to train, when standing up, the desired body part can be trained as well.

  In addition, the drive control unit 26d (26) is configured so that the speed of the holding unit 23 when the person M1 seated supported by the holding unit 23 is raised and the speed of the person standing up supported by the holding unit 23 are supported. It controls so that the speed of the holding | maintenance part 23 in the case where the assistant M1 is seated differs. Thereby, generally, the speed when a healthy person stands without assistance is slower than the speed when sitting, but similarly, when the person M1 who is supported by the holding unit 23 stands up. The speed can be slower than when sitting. Therefore, standing and sitting are assisted with the same feeling (feeling) as when a healthy person stands or sits. Therefore, it is possible to stand and sit without giving a sense of incongruity to the person being assisted M1.

  Further, when the drive control unit 26d (26) stands up the assisted person M1 seated supported by the holding unit 23, the drive control unit 26d (26) corresponds to the body part that the assisted person M1 wants to train among a plurality of sections of the standing locus. In this section, the speed of the drive unit is controlled so that the speed of the holding unit 23 becomes a speed according to the burden on the person being assisted M1. Thereby, when the person to be assisted M1 stands up, when a desired body part is also trained, the load applied to the body part to be trained can be easily adjusted.

  The holding portion 23 is provided at the distal end portion of the robot arm portion 22 provided with a plurality of arms 22a, 22b, and 22c that are provided on the base 21 and can be moved relative to each other by the driving portion, and supports the person being assisted. The storage device 27 (storage unit), when standing the assisted person M1 seated supported by the holding unit 23, the standing locus reference data indicating the rising locus through which the movement control part of the assisted person M1 passes. And a seating locus reference that indicates a seating locus that is different from the standing locus and through which the movement control part of the assistant M1 passes when the person being assisted standing by the holding unit 23 is seated. Data. The drive control unit 26d drives the drive unit to drive the robot arm unit 22 based on the standing locus reference data and the seating locus reference data. The standing locus indicates that the center of gravity position G of the person being assisted M1 is on the soles of both feet of the person being assisted during the period from the time after the start of the erection operation, which is the operation for raising the assisted person M1, to the end of the erection operation. Is set to exist within the range A. The seating locus indicates that the center of gravity position G of the person being assisted M1 is out of the range A on the back of both feet of the person being assisted M1 from an early point after the start of the sitting movement, which is an action for seating the person being assisted. It is set so as to move toward the planned seating position (sitting part) of M1.

  As a result, when the person being assisted stands up so that the movement control part of the person being assisted follows the standing locus, the center of gravity position G is displayed on both legs from the time when the standing motion starts early, as in the case where the normal person stands. The range A is entered in the range A, and the range A is thereafter entered until the end of the standing-up operation. Therefore, the person being assisted M1 is assisted in standing up with the same feeling (feeling) as when standing without assistance. Therefore, it can stand up without giving discomfort to the person being assisted M1.

  On the other hand, when the person being assisted is seated so that the movement control part of the person being assisted is along the locus of seating, the center of gravity position G is determined from the time when both the legs start from the beginning of the seating operation, as in the case where the normal person is seated. It moves out of the back range A and then moves to the planned sitting position of the person being assisted M1. Therefore, the person being assisted M1 is assisted in the seating with the same feeling (feeling) as when sitting without assistance. Therefore, the person being assisted can be seated without feeling uncomfortable.

  The seating locus described above is not limited to that shown in FIG. For example, as shown in FIG. 17, there is also a seating locus in which the user sits leaning forward compared to that shown in FIG. 10. In this case as well, as in the case shown in FIG. 10, the center of gravity position of the person being assisted M1 is positioned from the early point after the start of the seating operation, which is an operation for sitting the person being assisted M1. Out of the range A on the soles of both feet of the assistant M1.

  DESCRIPTION OF SYMBOLS 10 ... Care center, 11 ... Station, 12 ... Training room, 13a-13d ... 1st-4th private room, 14 ... Passage, 20 ... Assistance robot, 21 ... Base, 21g, 21h ... Motor for right and left driving wheels (drive) Source), 22 ... Robot arm, 22a ... First arm, 22a1c ... First rotation motor (drive unit), 22a2b ... Slide motor (drive unit), 22b ... Second arm, 22b3 ... Second rotation motor (Driving unit), 22c ... third arm, 23 ... holding unit, 24 ... handle, 25 ... operating device, 26 ... control device, 26a ... reference data acquisition unit, 26b ... height, chair height acquisition unit, 26c ... correction , Drive control unit, 27 ... storage device, 28 ... imaging device, 29 ... guide device, M1 ... helped person, M2 ... helper.

In order to solve the above-described problem, an assistance robot according to the present invention includes a base, a robot arm provided with a plurality of arms provided on the base and capable of moving relative to each other by a drive unit, and a robot arm A holding portion provided at the tip portion for supporting a part of the upper part of the person being assisted from the front of the person being assisted and for standing and sitting, and a person being assisted by the holding portion sitting on the seating portion. In this case, the position of the upper body of the person being supported by the holding part and along the orthogonal direction perpendicular to the extending direction of the holding part from a predetermined point located along the extending direction of the holding part. In the case of seating the person being assisted standing by the standing locus supported by the holding portion and the reference data for the rising locus through which the movement control site of the person being assisted is a position separated by a predetermined length , From the standing locus A storage unit that stores the reference data for the sitting locus that indicates the sitting locus through which the movement control part of the person being assisted passes, and the drive unit is driven to use the robot arm unit for the standing locus A drive control unit for driving based on the reference data and the reference data for the seating locus.

Claims (9)

An assisting robot having a holding unit that supports a part of the body of a person being assisted and assists standing and sitting,
In the case where the person being assisted sitting up is supported by the holding portion, the standing locus through which the movement control part of the person being assisted passes is the action of raising the person being assisted. The position of the center of gravity of the person being assisted is set to be within the range of the soles of both feet of the person being assisted between the early point after the point in time and the end point of the standing motion.
In the case where the person being assisted standing by the holding portion is seated, the seating locus that is different from the standing locus and through which the movement control part of the person is assisted is the seating locus of the person being assisted The position of the center of gravity of the person being assisted is moved out of the range of the soles of both feet of the person being assisted from the early time after the start time of the seating movement, which is the action of being seated, and moved to the planned seating position side of the person being assisted An assistance robot characterized by being set.   2. The assisting robot according to claim 1, wherein an earlier time point after the start time of the standing-up motion in the standing locus is a time point when the person being seated leans forward and the waist of the person being lifted rises. . An assisting robot having a holding unit that supports a part of the body of a person being assisted and assists standing and sitting,
The base,
A robot arm unit provided with a plurality of arms provided on the base and capable of relative movement with each other by a drive unit;
A holding portion that is provided at a distal end portion of the robot arm portion and supports the person being assisted,
In the case where the person being seated supported by the holding part is erected, the standing locus reference data indicating the rising locus through which the movement control part of the person being assisted passes and the holding part is supported. A storage unit that stores seating locus reference data indicating a seating locus that is different from the standing locus and that passes through the movement control part of the person being assisted when the person being erected is seated. When,
A drive control unit that drives the drive unit to drive the robot arm unit based on the reference data for the standing locus and the reference data for the sitting locus;
An assistance robot characterized by comprising: A correction unit that corrects the standing locus reference data and the sitting locus reference data according to at least one of the height of the person being assisted and the height of the seating portion on which the person is assisted;
The drive control unit drives the drive unit to drive the robot arm unit based on the standing locus reference data and the seating locus reference data corrected by the correction unit. The assistance robot according to claim 3. The standing locus reference data and the seating locus reference data also store the angles of the holding portions at the points of the standing locus and the sitting locus,
The drive control unit drives the drive unit so that the angle of the holding unit at each point becomes the angle stored in each of the standing locus reference data and each of the seating locus reference data. The assisting robot according to claim 3 or 4, wherein the assisting robot is controlled. The storage unit is a plurality of pieces of data for indicating a locus different from the standing locus corresponding to the reference data for the standing locus, and a plurality of pieces of standing locus data for training a plurality of different body parts of the person being assisted Remember more,
An acquisition unit for acquiring data corresponding to a body part that the care recipient wants to train from among the plurality of standing locus data;
The drive control unit drives the robot arm unit based on data acquired by the acquisition unit when the person being seated supported by the holding unit is erected. The assistance robot according to any one of claims 3 to 5.   The drive control unit seats the person being assisted by the speed of the holding part and the person being erected by the holding part when the person who is sitting and supported by the holding part is erected. The assisting robot according to any one of claims 3 to 6, wherein the assisting robot is controlled so as to be different from a speed of the holding unit.   In the section according to the body part that the care recipient wants to train, among the plurality of sections of the standing locus, when the drive control unit stands up the person being seated supported by the holding unit, The assistance robot according to claim 7, wherein the speed of the driving unit is controlled so that a speed of the holding unit becomes a speed according to a burden on the person being assisted. An assisting robot having a holding unit that supports a part of the body of a person being assisted and assists standing and sitting,
The base,
A robot arm unit provided with a plurality of arms provided on the base and capable of relative movement with each other by a drive unit;
A holding portion that is provided at a distal end portion of the robot arm portion and supports the person being assisted,
In the case where the person being seated supported by the holding part is erected, the standing locus reference data indicating the rising locus through which the movement control part of the person being assisted passes and the holding part is supported. A storage unit that stores seating locus reference data indicating a seating locus that is different from the standing locus and that passes through the movement control part of the person being assisted when the person being erected is seated. When,
A drive control unit that drives the drive unit to drive the robot arm unit based on the reference data for the standing locus and the reference data for the sitting locus;
With
The standing trajectory indicates that the position of the center of gravity of the person being assisted is between the early time after the start time of the standing action, which is the action of raising the person being assisted, and the end time of the standing action. Set to exist within the back range,
The seating trajectory is such that the position of the center of gravity of the person being assisted falls out of the range of the soles of both feet of the person being assisted from an earlier time after the start of the seating operation, which is an action for seating the person being assisted. An assisting robot that is set to move to the planned seating position side of the robot.

Images