JP6104883B2 - Chair bed - Google Patents

Description

  The present invention relates to a chair bed having both a chair and a bed.

  Patent Document 1 discloses a conventional chair bed. The chair bed is provided with a seat that comes into contact with the buttocks of the person to be seated, a backrest that is swingable with respect to the seat at the back of the seat, and a seat that is in contact with the back of the person and a seat at the front of the seat. And a thigh receiving portion that is provided so as to be swingable with respect to the portion and abuts against a human thigh.

  The seat is provided substantially horizontally. The backrest can be in the state of a chair that rises upward with respect to the seat, and can be in the state of a bed that is substantially horizontal with the seat. At the same time, the backrest can swing between a chair state and a bed state and can be fixed at any angle between them. The thigh receiving portion may be in a normal state that is substantially horizontal with the seat portion, and may be in a special state in which the thigh is lifted from the seat portion and the thigh is bent from the human waist. At the same time, the thigh receiving portion can swing between the normal state and the special state in conjunction with the backrest.

  The chair bed further includes an upper frame, a lower frame, an elevating device, and a link mechanism. The upper frame supports the seat portion, the backrest, and the thigh receiving portion. The lower frame supports the upper frame, and three or more casters are provided at the lower end. The elevating device is provided between the upper frame and the lower frame, and elevates the upper frame relative to the lower frame. The link mechanism is provided between the upper frame and the lower frame, and moves the upper frame up and down relative to the lower frame in cooperation with the lifting device.

  The lifting device is a linear actuator having a motor built-in and having a main body swingably provided on the lower frame and a rod extending or shortening from the main body in a substantially horizontal direction by the rotation of the motor.

  The link mechanism has a plurality of link levers having one end swingable with respect to the upper frame and the other end swingable with respect to the lower frame. At least one of the link levers is provided with a rod of a linear actuator so as to be able to swing.

  In this chair bed, each link lever swings as the rod of the linear actuator extends or shortens from the main body. As a result, one end side of each link lever swings, and the upper frame connected to the one end moves up and down with respect to the lower frame.

Japanese Patent No. 4644776

  By the way, in the conventional chair bed, since the linear actuator as the lifting device extends or shortens the rod in the substantially horizontal direction, the linear actuator extends or shortens the rod in the substantially vertical direction. It is easy to downsize the bed in the vertical direction.

  However, in this chair bed, since the rod is provided so as to be able to swing directly on the link lever, the direction in which one end side of each link lever swings tends to be closer to the horizontal direction than the vertical direction. For this reason, in this chair bed, it is difficult to ensure a large lifting stroke when the swing of the link lever is converted to lifting of the upper frame.

  The present invention has been made in view of the above-described conventional situation, and it is a problem to be solved to provide a chair bed capable of reliably securing a lifting stroke of the upper frame while realizing downsizing in the vertical direction. Yes.

The chair bed of the present invention is a chair bed that combines a chair and a bed,
A seat that contacts the buttocks of the person to be seated;
A backrest that is swingable with respect to the seat on the back side of the seat, and that contacts the back of the person;
A thigh receiving portion provided on the front side of the seat portion so as to be swingable with respect to the seat portion and contacting the human thigh;
The seat is provided substantially horizontally,
The backrest can be in a chair state that stands up with respect to the seat portion, can be in a bed state that is substantially horizontal with the seat portion, and swings between the chair state and the bed state. And can be fixed at any angle between them,
The thigh receiving portion may be in a normal state that is substantially horizontal with the seat portion, and may be in a special state in which the thigh is lifted from the seat portion and the thigh is bent from the waist of the person, and is independent of the backrest. A chair bed that can swing between the normal state and the special state and can be fixed at any angle between them,
An upper frame that supports the seat, the backrest and the thigh receiving part;
A lower frame that supports the upper frame and is provided with three or more casters at the lower end;
An elevating device provided between the upper frame and the lower frame and elevating the upper frame relative to the lower frame;
A link mechanism that is provided between the upper frame and the lower frame and that moves the upper frame up and down relative to the lower frame in cooperation with the lifting device;
The lifting device includes a motor, and a main body swingably provided on one of the upper frame and the lower frame, and a rod extending or shortening from the main body in a substantially horizontal direction by the rotation of the motor. A linear actuator having
The link mechanism is provided with a plurality of link levers having one end swingable relative to the other of the upper frame and the lower frame, and the other end swingable relative to the one. And a link arm provided integrally with at least one of the link levers, extending toward the one side while intersecting the direction in which the link lever extends, and having the rod swingably provided at the tip of the link lever. (Claim 1).

  Also in the chair bed of the present invention, the linear actuator as the elevating device extends or shortens the rod in the substantially horizontal direction, so that it can be easily downsized in the vertical direction as in the conventional chair bed.

  In this chair bed, at least one link lever is integrally provided with a link arm. The link arm extends toward one of an upper frame and a lower frame in which the main body of the linear actuator is provided so as to be able to swing while intersecting the direction in which the link lever extends. The rod of the linear actuator is swingably provided at the tip of the link arm. As a result, the direction in which the tip end side of the link arm swings can be brought closer to the substantially horizontal direction in which the rod extends or shortens, while the direction in which the one end side or the other end side of the link lever swings closer to the vertical direction. it can. As a result, in this chair bed, the swing of the link lever can be reliably converted into a large lifting stroke of the upper frame as compared with the conventional chair bed in which the rod is swingably provided on the link lever. .

  Therefore, in the chair bed of the present invention, the vertical stroke of the upper frame can be reliably ensured while realizing downsizing in the vertical direction.

  Further, in this chair bed, the thigh receiving part can swing independently of the backrest and can be fixed. For this reason, for example, a thigh receiving part can be made into a special state and a person's thigh can be bent from a waist part, making a backrest into a reclining state. In this case, since the thigh receiving part supports the weight of the user, the buttocks do not slide forward on the thigh receiving part, so that the user can spend more comfortably.

  The chair bed of the present invention preferably further includes an armrest supported by the upper frame and capable of swinging in synchronization with swinging of the backrest (claim 2). According to this configuration, it is possible to save the trouble of manually adjusting the position of the armrest when the backrest is swung, so that it is possible to improve convenience and comfort. In addition, the armrest may be displaced so as to rise vertically, so that one side or the other side in the width direction of the seat portion can be opened. In this case, it becomes easy for a person to sit or leave.

  The chair bed of the present invention preferably further includes a detachable support device. The detachable support device is detachably attached to the lower part of the front portion of the lower frame, and is integrally formed with the detachable part. When the detachable part is attached, the bearing part positioned at the center in the width direction and the bearing part A supported bearing part that is pivotally supported in the range from one to the other in the width direction around the first axial center that extends vertically, and the bearing part are integrated with each other to support specific objects used by people It is desirable to have a supporting means. And it is desirable for the bearing part to extend ahead of the attaching / detaching part.

  Japanese Unexamined Patent Application Publication No. 2009-56257 discloses a conventional detachable support device. This detachable support device includes an detachable part that can be attached to and detached from a chair, and a support unit that is integrated with the detachable part. The support means supports a table used by a seated person.

  More specifically, the chair is provided with a fixing member for attaching / detaching the attaching / detaching portion. The fixing member is fixed to one side in the width direction. The detachable portion is pivotally supported by the fixed member so as to be rotatable about an axial center extending vertically when the detachable portion is mounted on the fixed member. And the table can be moved in the range from one side in the width direction to the front by integrally rotating the support means and the detachable portion with respect to the fixing member.

  However, in the conventional detachable support device, the table cannot be moved to the other side in the width direction because the fixing member is located on one side in the width direction. Whether it is preferable to have the table in one or the other in the width direction depends on the seated person, so if you want to place the table in the other in the width direction, you must re-fix the fixing member to the other in the width direction. I must. In addition, a chair having a fixing member fixed to one side in the width direction and a chair having a fixing member fixed to the other side in the width direction must be prepared. This defect is not limited to when a person uses a table. For this reason, the conventional detachable support device is not convenient for a seated person.

  When the conventional detachable support device is used for a chair bed where a patient or a cared person sits down or lies down in the field of medical care or nursing, etc. It feels more prominent.

  On the other hand, the chair bed of the present invention includes a detachable support device, and the detachable support device has a bearing portion that is integral with the detachable portion. If the detachable part is mounted below the front part of the lower frame, this bearing part is positioned at the center in the width direction. The supported part is pivotally supported with respect to the bearing part, and the support means is integrated with the supported part. It is possible to support a specific object such as a table used by a person on which the support means is seated. For this reason, in this chair bed, the specific object can be rotated in the range from one to the other in the width direction around the first axis extending vertically by the detachable support device.

  For this reason, the seated person can change the position of the specific object depending on whether the specific object is preferred in one or the other in the width direction. At this time, the person who is seated can change the position of the specific object with one hand as long as it can grip the bearing portion and the supporting means with one hand.

  Therefore, in the chair bed of this invention, the convenience of the seated person can be improved by the detachable support device.

  It is desirable that the bearing part and the bearing part are located below the front part of the lower frame. The supporting means preferably includes a connecting portion extending in parallel with the floor surface from the bearing portion, and a column having a caster extending upward from the connecting portion and having a caster at its lower end. According to this configuration, the support means can be favorably rotated from one side in the width direction to the other side in the width direction by rolling the caster on the floor surface on which the chair bed is installed. . As a result, a person can easily change the position of the support means with a small force. As a result, in this chair bed, the convenience of the seated person can be reliably improved by the detachable support device.

  It is desirable that the support means has a rotating portion that can rotate about a second axis extending vertically with respect to the support column. According to this configuration, since the specific object can be rotated around the second rotation axis with respect to the support column by the rotation unit, the relative positional relationship between the seated person and the specific object can be easily adjusted. As a result, in this chair bed, the convenience of the seated person can be more reliably improved by the detachable support device.

  It is desirable that the support means has a horizontal moving part that can move horizontally with respect to the support column. According to this configuration, the specific object can be horizontally moved with respect to the support column by the horizontal movement unit, and therefore, the relative positional relationship between the seated person and the specific object can be more easily adjusted. As a result, in this chair bed, the convenience of the seated person can be more reliably improved by the detachable support device.

  The specific object is desirably at least one of a table, a display holding means, an infusion device, and a dialysis device (Claim 7). Depending on the needs of the seated person, at least one of the table, the display holding means, the drip device, and the dialysis device can be used by the seated person.

It is a perspective view of the chair bed of an Example. It is a model side view of the chair bed of an Example. FIG. 4 is a schematic cross-sectional view showing a seat frame, a backrest frame, a thigh receiving frame, a lower thigh receiving frame, a footrest frame, and the like extracted from a chair bed in a chair state. It is a skeleton figure, such as a raising / lowering device and a link mechanism. It is a skeleton figure, such as a 1st rocking | fluctuation fixing mechanism. It is a skeleton figure, such as an armrest rocking | fluctuation fixing mechanism. It is a skeleton figure, such as a 2nd rocking | fluctuation fixing mechanism. It is a model side view of the chair bed which made the backrest into the bed state and made the thigh receiving part into the normal state. It is a model side view of the chair bed which made the backrest into the bed state and made the thigh receiving part into the special state. It is a model side view of the chair bed which made the backrest into the shock posture state, and made the thigh receiving part into the special state. It is a model side view of the chair bed which made the backrest into the reclining state and made the thigh receiving part into the special state. (A) is a schematic top view showing a state in which the support means is turned to one side in the width direction, (b) is a schematic top view showing a state in which the support means is turned to the other side in the width direction, (C) is a schematic top view which shows operation | movement of a rotation part and a horizontal movement part. It is a perspective view of the chair bed of an Example.

  Hereinafter, a chair bed 1 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the chair bed 1 has both a chair and a bed. The chair bed 1 includes a seat portion 13, a backrest 15, a thigh receiving portion 17, a lower leg receiving portion 19, and a footrest 21. The seat part 13, the backrest 15, the thigh receiving part 17, the lower leg receiving part 19 and the footrest 21 each have a built-in cushion, and leather is applied to the surface layer. Hereinafter, with respect to the chair bed 1, the footrest 21 side is the front side, and the headrest 23 side is the rear side.

  As shown in FIG. 1, a headrest 23 is provided on the upper end side of the backrest 15 so as to be detachable and vertically movable by a hook-and-loop fastener. Armrests 27A and 27B are provided on one side and the other side of the seat portion 13 in the width direction.

  As shown in FIG. 2, the seat portion 13 comes into contact with the buttocks portion P <b> 1 of the person P who is seated. The backrest 15 abuts against the back P2 of the person P. The thigh receiving part 17 contacts the thigh P3 of the person P. The lower leg receiver 19 abuts against the calf of the lower leg P4 of the person P. The footrest 21 comes into contact with the back of the foot P5 of the person P. Although not shown in FIG. 2, the headrest 23 shown in FIG. 1 is in contact with the head P <b> 6 of the person P. Moreover, although illustration is abbreviate | omitted, armrest 27A, 27B shown in FIG.

  As shown in FIG. 3, the thigh receiving part 17 and the lower leg receiving part 19 are connected by a hinge 31. The hinge 31 can swing both until the surface of the thigh receiving part 17 and the surface of the lower leg receiving part 19 are flush with each other from an angle exceeding 180 °. A leather cover 32 (not shown in FIG. 1) is sewn on the thigh receiving part 17 and the lower leg receiving part 19 so as to hide the hinge 31 and not give the person P a sense of incongruity.

  Further, the lower leg receiving portion 19 and the footrest 21 are connected by a hinge 33. The hinge 33 is swingable until the surface of the lower leg receiving portion 19 and the surface of the footrest 21 are flush with each other from an angle exceeding about 90 °. The hinge 33 is hidden by being provided on the back side of the crus receiving part 19 and the footrest 21 so as not to give the person P a sense of incongruity.

  As shown in FIGS. 3 to 7, the chair bed 1 includes a base frame 11, a seat frame 34, a backrest frame 35, a thigh receiving frame 36, a crus receiving frame 37, a footrest frame 38, and the like. I have. The base frame 11 is an example of the “lower frame” in the present invention. The seat frame 34 is an example of the “upper frame” in the present invention. The chair bed 1 also includes an elevating linear actuator 45, a link mechanism 40, a first swing fixing mechanism 50, a second swing fixing mechanism 70, and an armrest swing fixing mechanism 60. The linear actuator 45 is an example of the “elevating device” in the present invention.

  As shown in FIG. 3, the seat 13 is horizontally fixed to the seat frame 34. The backrest 15 is fixed to a backrest frame 35. The thigh receiving portion 17 is placed on the thigh receiving portion frame 36. The crus receiving part 19 is placed on the crus receiving part frame 37. The footrest 21 is placed on a footrest frame 38.

  As shown in FIGS. 1 and 4, the base frame 11 has a metal square pipe assembled in a frame shape and extends substantially horizontally above the floor surface. Casters 29 are provided at the front, rear, left and right corners of the base frame 11, respectively.

  As shown in FIG. 4, the link mechanism 40 is provided between the base frame 11 and the seat frame 34. That is, two link levers 41 are provided on the front side of the base frame 11 so as to be able to swing around the point A as pivots, and two link levers 42 are pivoted around the point B at the rear side of the base frame 11. Is provided so as to be swingable. The seat frame 34 is provided with two support legs 34A and 34B that extend downward on the left and right sides. The other ends of the link levers 41 and 42 swing around the support legs 34A and 34B with the points C and D as pivots. It is provided to be movable. The link levers 41 and 42 are provided with a connecting rod 46 so as to be swingable about the E point and the F point as pivots. A link arm 44 is fixed to the link lever 42. The link arm 44 extends toward the seat frame 34 while intersecting the direction in which the link lever 42 extends.

  The body 45A of the linear actuator 45 is provided on the seat frame 34 so as to be swingable about the point G, and the rod 45B of the linear actuator 45 is provided on the tip of the link arm 44 so as to be swingable about the point H. It has been. The main body 45A incorporates a DC motor. The rod 45B extends or shortens from the main body 45A in a substantially horizontal direction by the rotation of the DC motor. The linear actuator 45 can be operated by a remote controller 43 (see FIG. 1). A link mechanism 40 is constituted by the link levers 41 and 42 and the link arm 44.

  As shown in FIG. 5, the first swing fixing mechanism 50 is provided between the seat frame 34 and the backrest frame 35. That is, the backrest frame 35 is swingably provided on the seat frame 34 with the pivot point I as a pivot. An arm 51 is fixed to the backrest frame 35. On the seat frame 34, the main body 52A of the first linear actuator 52 is provided so as to be swingable about the W point, and the rod 52B of the first linear actuator 52 swings about the J point at the tip of the arm 51. It is provided as possible. The first linear actuator 52 can be operated by a remote controller 43 (see FIG. 1). The first swing fixing mechanism 50 is constituted by these arms 51 and the like.

  As shown in FIG. 6, the armrest swing fixing mechanism 60 is provided between the seat frame 34 and the backrest frame 35. That is, a horizontal bar 61 is fixed to the seat frame 34, and armrests 27A and 27B are swingably provided on the backrest frame 35 with the pivot point K as a pivot. A parallel link 62 is swingably provided on the armrests 27A and 27B with the L point as a pivot. A slider 63 is slidably provided in the parallel link 62 through a long hole, and a horizontal bar 61 is provided on the slider 63 so as to be swingable about the point M as a pivot. These horizontal bars 61 and the like constitute an armrest swing fixing mechanism 60. By such an armrest swing fixing mechanism 60, the armrests 27A and 27B can swing in synchronization with the swing of the backrest 15.

  Further, the armrests 27A and 27B can be displaced so as to swing around the pivot axis L shown in FIG. In FIG. 1, the armrest 27 </ b> A in a vertically rising state is illustrated by a two-dot chain line. Although illustration is omitted, the armrest 27B is the same as the armrest 27A.

  As shown in FIG. 7, the second swing fixing mechanism 70 is provided between the seat portion frame 34, the thigh receiving portion frame 36 and the crus receiving portion frame 37. In other words, the support bar 71 is fixed upward on the seat frame 34, and a first link 72 is provided at the upper end of the support bar 71 so as to be swingable about the N point as a pivot. When the chair bed 1 is in the chair posture, the first link 72 extends downward from the point N, then bends forward and extends substantially horizontally, and the seat frame extends from the front end of the main portion 72A. After being lifted upward from 34, the connecting portion 72B bends forward and a guide portion 72C extending downward from the tip of the main portion 72A. When the chair bed 1 is in the chair posture, the thigh receiving portion frame 36 extending substantially horizontally is fixed to the connecting portion 72B.

  The crus receiving part frame 37 is swingably provided on the seating part frame 34 with the O point as a pivot. Arms 73 and 74 are fixed to the crus receiving part frame 37. A body 75A of the second linear actuator 75 is provided on the seat frame 34 so as to be swingable about the point X, and a rod 75B of the second linear actuator 75 swings about the point Q at the tip of the arm 53. It is provided as possible. The second linear actuator 75 can also be operated by the remote controller 43.

  The arm 74 is provided with a second link 76 pivotable about the point R. A slider 77 is slidably provided in the second link 76 through a long hole. A stopper 76A for stopping the slider 77 is formed at the tip of the second link 76.

  An intermediate link 78 is swingably provided on the support leg 34A of the seat frame 34 with the point S as a pivot. A slider 79 is slidably provided in the guide portion 72C of the first link 72 through a long hole. An intermediate link 78 is provided on the slider 77 so as to be swingable about the point T, and an intermediate link 78 is provided on the slider 79 so as to be swingable about the point U. The sliders 77 and 79 and the intermediate arm 78 constitute a delay mechanism 80. Further, the second swing fixing mechanism 70 is constituted by the first link 72 and the like. The linear actuator 45 and the first and second linear actuators 52 and 75 are of the same type.

  A footrest frame 38 is provided at the front end of the crus receiving part frame 37 so as to be swingable about the point V as a pivot. Between the crus receiving part frame 37 and the footrest frame 38, a four-node parallel link 39 is provided to keep the footrest frame 38 horizontal.

  Moreover, in this chair bed 1, as shown in FIG. 1, side wall 25A, 25B is provided in the downward both sides of the seat part 13, the thigh receiving part 17, and the crus receiving part 19. As shown in FIG. Both side walls 25A are fixed to the base frame 11, and both side walls 25B are fixed to the seat frame 34.

  The chair bed 1 is used for medical purposes or nursing care. In the chair bed 1, the linear actuator 45 shown in FIG. 4 is driven by the operation of the remote controller 43, and the rod 45 B is extended or shortened from the main body 45 A in the substantially horizontal direction by the rotation of the DC motor. The levers 41 and 42 and the link arm 44 swing, and the seat frame 34 becomes an arbitrary height.

  Further, the first swing fixing mechanism 50 shown in FIG. 5 is driven by the operation of the remote controller 43, and the rod 52B of the first linear actuator 52 is extended most. Moreover, the 2nd rocking | fluctuation fixing mechanism 70 shown in FIG. 7 is driven, and the rod 75B of the 2nd linear actuator 75 is shortened most. Thereby, the chair bed 1 is set to the chair posture shown in FIGS. In this chair posture, the seat portion 13 is maintained substantially horizontal at an arbitrary height. Further, the backrest 15 is in a chair state that rises upward with respect to the seat portion 13. The thigh receiving part 17 is in a normal state that is substantially horizontal with the seat part 13. The lower leg receiving portion 19 is inclined downward so that the foot P5 of the person P faces downward. The footrest 21 is in a substantially horizontal state. Therefore, the person P can sit on the chair bed 1.

  By operating the remote controller 43, the first swing fixing mechanism 50 shown in FIG. 5 is driven, and the rod 52B of the first linear actuator 52 is shortened to some extent. Moreover, the 2nd rocking | fluctuation fixing mechanism 70 shown in FIG. 7 is driven, and the rod 75B of the 2nd linear actuator 75 is extended to some extent. At this time, in the delay mechanism 80, since the slider 77 does not come into contact with the stopper 76B, only the crus receiving part frame 37 rises, and the thigh receiving part frame 36 does not yet swing upward. For this reason, the chair bed 1 is set to the first bed posture shown in FIG. In the first bed posture, the seat portion 13 is maintained substantially horizontally at an arbitrary height, similar to the chair posture shown in FIGS. Further, the backrest 15 is brought into a bed state that is substantially horizontal together with the seat portion 13. The thigh receiving part 17 is in a normal state that is substantially horizontal with the seat part 13. The lower leg receiver 19 and the footrest 21 are also substantially horizontal. For this reason, the person P can lie on his back in the chair bed 1.

  By operating the remote controller 43, the first swing fixing mechanism 50 shown in FIG. 5 is left as it is, the second swing fixing mechanism 70 shown in FIG. 7 is driven, and the rod 75B of the second linear actuator 75 is extended most. At this time, in the delay mechanism 80, the slider 77 comes into contact with the stopper 76B, the intermediate link 78 swings, and the first link 72 swings, so that the thigh receiving part frame 36 and the thigh receiving part frame 37 are moved together. Swings upward. For this reason, the chair bed 1 is set to the second bed posture shown in FIG. In the second bed posture, the seat 13 and the backrest 15 are maintained substantially horizontally at an arbitrary height, as in the chair posture shown in FIGS. The thigh receiving portion 17 is brought into a special state that is lifted from the other end side of the seat portion 13. The crus receiving part 19 and the footrest 21 are substantially horizontal from the other end side of the thigh receiving part 17. Therefore, the person P can lie down on the chair bed 1 and lift the lower leg P4 from the head P6 in the case of a broken ankle or the like.

  By operating the remote controller 43, the first swing fixing mechanism 50 shown in FIG. 5 is driven, and the rod 52B of the first linear actuator 52 is shortened the most. Further, the second swing fixing mechanism 70 shown in FIG. 7 is left as it is. For this reason, the chair bed 1 is in the shock posture shown in FIG. In this shock posture, the seat 13 is maintained substantially horizontally at an arbitrary height, similar to the chair posture shown in FIGS. The backrest 15 is placed in a shock posture state in which the head P6 of the person P is inclined downward with respect to the seat portion 13. As with the second bed posture shown in FIG. 9, the thigh receiving portion 17 is brought into a special state where it is lifted from the other end side of the seat portion 13. The lower leg receiving part 19 and the footrest 21 are substantially horizontal from the other end side of the thigh receiving part 17 as in the second bed posture shown in FIG. For this reason, the person P can take a shock posture on the chair bed 1. At this time, the thigh receiving part 17 is in a special state so that blood easily goes to the head P6, and peripheral circulatory failure of the heart and brain can be prevented. Further, the presence of the lower leg receiving portion 19 makes it difficult for a patient in shock position to fall from the head P6.

  By operating the remote controller 43, the first swing fixing mechanism 50 shown in FIG. 5 is driven, and the rod 52B of the first linear actuator 52 is extended to some extent. Further, the second swing fixing mechanism 70 shown in FIG. 7 is driven, and the rod 75B of the second linear actuator 75 is extended to some extent. For this reason, the chair bed 1 is set to the tilt posture shown in FIG. In this tilt posture, the seat portion 13 is maintained substantially horizontal at an arbitrary height, like the chair posture shown in FIGS. The backrest 15 is brought into a reclining state. As with the second bed posture shown in FIG. 9, the thigh receiving portion 17 is brought into a special state where it is lifted from the other end side of the seat portion 13. The lower leg receiving part 19 and the footrest 21 are substantially horizontal from the other end side of the thigh receiving part 17 as in the second bed posture shown in FIG. For this reason, the person P can take a tilted position on the chair bed 1.

  Thus, in the chair bed 1, the thigh receiving portion 17 can swing independently of the backrest 15 and can be fixed. In the chair bed 1, the seat portion 13 is provided substantially horizontally, and the thigh receiving portion 17 is swingable with respect to the seat portion 13. For this reason, the chair bed 1 can be tilted relatively easily. In this case, since the thigh receiving part 17 supports the weight of the person P, the buttocks P1 does not slide on the thigh receiving part 17 toward the other end side. As a result, in this chair bed 1, the person P can spend more comfortably. In addition, the chair bed 1 employs fewer three linear actuators than the conventional one, so that the manufacturing cost can be reduced.

  As shown in FIGS. 1, 2, 12, and 13, the chair bed 1 further includes a detachable support device 100. The detachable support device 100 is detachably provided on the chair bed 1 and supports the table 190. The table 190 is an example of the “specific item” in the present invention. In the following description, the front-rear direction is based on the front-rear direction in the chair bed 1.

  The detachable support device 100 includes an detachable part 110, a bearing part 120, a bearing part 130, and a support means 140.

  The detachable part 110 has a channel part 111 and an extending part 112. The channel portion 111 has a substantially C-shaped cross section that can be fitted to a metal square pipe 11 </ b> P extending in the width direction on the front side of the base frame 11. The extending portion 112 extends in a flat plate shape from the channel portion 111 toward the front.

  The detachable portion 110 is firmly attached to the square pipe 11P by fitting the channel portion 111 in the center in the width direction of the square pipe 11P and tightening the rear end side of the channel portion 111 by fastening means 113 such as screws. It is attached to. In this state, the attaching / detaching portion 110 is in a state in which the extending portion 112 protrudes forward from the center in the width direction of the square pipe 11P. On the other hand, the attaching / detaching portion 110 is detached from the square pipe 11P by loosening the fastening means 113 and removing it from the channel portion 111. Thus, the detachable portion 110 is detachable with respect to the center in the width direction of the square pipe 11P.

  The bearing portion 120 is fixed to the front end of the extending portion 112 so as to be integrated with the attaching / detaching portion 110. As the bearing portion 120, for example, a turntable bearing combined with a radial bearing and a thrust bearing is employed.

  The bearing portion 130 is assembled to the bearing portion 120 from above. And the to-be-bearing part 130 is pivotally supported so that rotation about the 1st axial center X1 extended up and down with respect to the bearing part 120 is possible. In the present embodiment, the bearing portion 130 is shown in FIGS. 12 (b) and 13 through the front of the chair bed 1 from one side in the width direction of the chair bed 1 shown in FIGS. 1 and 12 (a). The chair bed 1 can be turned around the first axis X1 with respect to the bearing portion 120 in the range up to the other in the width direction of the chair bed 1 shown.

  As the bearing part 130, an already-made bearing unit may be configured by being assembled integrally with the bearing part 120.

  In a state where the detachable part 110 is mounted on the base frame 11 of the chair bed 1, the bearing part 120 and the supported part 130 are located in the center in the width direction of the chair bed 1 and below the front part of the base frame 11. ing.

  As shown in FIGS. 1, 2, 12, and 13, the support unit 140 includes a connecting portion 141, a support 142, a horizontal moving portion 160, and a rotating portion 150.

  The connecting portion 141 is a metal square pipe that has one end fixed to the bearing portion 130 and the other end extending in parallel to the floor so as to be separated from the bearing portion 130. The length of the connecting portion 141 is made long so that the support column 142 does not interfere with the seat portion 13, the thigh receiving portion 17, the crus receiving portion 19, the footrest 21, the base frame 11, or the like of the chair bed 1.

  The support column 142 includes a base portion 143 that is a metal square pipe, a guide portion 144, and a vertical movement portion 145.

  The base portion 143 is connected to the other end side of the connecting portion 141 and extends in parallel with the floor surface while being orthogonal to the direction in which the connecting portion 141 extends. Casters 143 and 143B are provided at both ends of the base portion 143. The support means 140 can be rotated around the first axis X <b> 1 integrally with the bearing part 130 by the connecting part 141 and the base part 143.

  The guide part 144 protrudes long upward from the other end side of the connecting part 141.

  The vertical moving portion 145 is movable in the vertical direction along the guide portion 144 with the guide portion 144 inserted through the vertical moving portion 145. Further, the vertical moving part 145 can be fixed to the guide part 144 at an arbitrary height by a locking means (not shown).

  As shown in FIGS. 2 and 12, the horizontal moving unit 160 is connected to the upper end of the vertical moving unit 145 via a parallel link. As shown in FIGS. 12C and 13, the horizontal moving unit 160 can move horizontally with respect to the support column 142 by deforming the parallel link into a parallelogram shape.

  As shown in FIG. 2, the rotation unit 150 is assembled on the upper surface of the horizontal movement unit 160. A flat table 190 is assembled on the upper surface of the rotating unit 150 in a substantially horizontal posture. The rotation unit 150 can rotate about a second axis X2 extending vertically with respect to the horizontal movement unit 160. As shown in FIG. 12C and FIG. 13, the table 190 can be rotated around the second axis X <b> 2 with respect to the support column 142, integrally with the rotation unit 150.

  Here, also in the chair bed 1 of the embodiment, as shown in FIG. 4, the linear actuator 45 as the elevating device extends or shortens the rod 45 </ b> B in a substantially horizontal direction. Easy to miniaturize in direction. In the chair bed 1, a link arm 44 is provided integrally with the link lever 42. The link arm 44 extends toward the seat frame 34 on which the main body 45A of the linear actuator 45 is provided so as to be able to swing while intersecting the direction in which the link lever 42 extends. A rod 45B of the linear actuator 45 is swingably provided at the tip of the link arm 44. Thereby, in this chair bed 1, the direction in which the front end side of the link arm 44 swings can be brought close to the substantially horizontal direction in which the rod 45B extends or shortens. On the other hand, in this chair bed 1, the direction in which one end side of the link levers 41, 42 swingably provided on the seat frame 34 can be made closer to the vertical direction. As a result, in the chair bed 1, the swing of the link levers 41 and 42 is larger than that of the conventional chair bed 34 in which the rod is provided on the link lever so as to be swingable directly. It can be reliably converted into a lifting stroke.

  Therefore, in the chair bed 1 of an Example, the raising / lowering stroke of the frame 34 for seats can be ensured reliably, implement | achieving size reduction in an up-down direction.

  Further, as shown in FIG. 6, the chair bed 1 is further provided with armrests 27 </ b> A and 27 </ b> B that are supported by the seat frame 34 and can swing in synchronization with the swing of the backrest 15. For this reason, in this chair bed 1, since the trouble of manually adjusting the positions of the armrests 27A and 27B when the backrest 15 is swung, it is possible to improve convenience and comfort. Further, the armrests 27A and 27B swing around the pivot axis L and are displaced so as to rise vertically as indicated by a two-dot chain line in FIG. Thereby, since armrest 27A, 27B can open | release the one side or the other side of the width direction of the seat part 13, the person P is easy to seat or leave.

  In this chair bed 1, the detachable support device 100 has a bearing portion 120 that is integral with the detachable portion 110. If the attaching / detaching part 110 is mounted below the front part of the base frame 11, the bearing part 120 is positioned at the center in the width direction. The bearing portion 130 is pivotally supported with respect to the bearing portion 120, and the coupling portion 141 is integrated with the bearing portion 130. The rotating unit 150 supports a table 190 used by a person P sitting on the chair bed 1. For this reason, in the chair bed 1 to which the detachable support device 100 is mounted, as shown in FIGS. 12A and 12B, the table 190 extends from one side in the width direction around the first axis X1 extending vertically. It can be rotated in the range up to.

  For this reason, the seated person P can change the position of the table 190 according to whether the table 190 is preferred in one or the other in the width direction. At this time, the seated person P can hold the support column 142 with one hand. Further, in the detachable support device 100, the bearing portion 120 and the bearing portion 130 are located below the front portion of the chair bed 1. And the support means 140 has the connection part 141 and the support | pillar 142. FIG. Casters 143A and 143B are provided at both ends of the base 143 of the column 142. For this reason, the support means 140 moves in the width direction of the chair bed 1 from one side in the width direction of the chair bed 1 through the front of the chair bed 1 by the casters 143A and 143B rolling on the floor surface. It can rotate well to the other. As a result, the person P can easily change the position of the support means 140 with a small force.

  For this reason, as shown in FIGS. 1 and 12A, the table 190 is moved to one side in the width direction of the chair bed 1, or as shown in FIGS. 12B and 13, the table 190 is moved to the chair bed. It can be moved to the other in the width direction of 1. In this way, the person P can easily move the table 190 to a position where it can be easily used, or retract the table 190 to a position where it does not get in the way when sitting or leaving the chair bed 1.

  Further, in this detachable support device 100, as shown in FIGS. 12C and 13, the table 190 can be rotated around the second rotation axis X2 with respect to the column 142 by the rotation unit 150. Further, the table 190 can be moved horizontally with respect to the support 142 by the horizontal moving unit 160. As a result, the relative positional relationship between the person P and the table 190 can be adjusted more easily.

  Therefore, in the chair bud 1, the convenience of the seated person P can be improved by the detachable support device 100.

  Further, in this chair bud 1, the connecting portion 141 is extended in parallel with the floor surface from the supported portion 130 located at the center in the width direction of the chair bed 1 and below the front side of the base frame 11, thereby rotating. The supporting column 142 is unlikely to interfere with the seat portion 13, the thigh receiving portion 17, the lower leg receiving portion 19, the footrest 21, the base frame 11, or the like of the chair bed 1.

  Furthermore, the chair bed 1 can be used particularly for dialysis by changing to the state shown in FIGS. 2 and 8 to 11. In this case, the person P must sit on the chair bed 1 for a long time. For this reason, not only the support means 140 supports the table 190 but also the support means 140 supports the display holding means, the drip device or the dialysis device, etc. so that the user can watch TV or receive treatment such as drip. Can do. For example, when the display holding unit (not shown) is supported by the support unit 140 and the display holding unit holds the display, the display holding unit is rotated around the second rotation axis X1 by the rotation unit 150. be able to. Thereby, this chair bed 1 can be easily adjusted to an angle at which a person P sitting on the display surface of the display can easily see.

  While the present invention has been described with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments and can be appropriately modified and applied without departing from the spirit thereof.

  The chair bed of the present invention can be used for medical purposes, nursing care and the like.

DESCRIPTION OF SYMBOLS 1 ... Chair bed P ... Seated person P1 ... Buttocks 13 ... Seat part P2 ... Back part 15 ... Backrest P3 ... Thigh 17 ... Thigh receiving part 34 ... Upper frame (frame for seat part)
29 ... Caster 11 ... Lower frame (base frame)
45 ... Elevating device (linear actuator)
DESCRIPTION OF SYMBOLS 40 ... Link mechanism 45A ... Main body 45B ... Rod 41, 42 ... Link lever 44 ... Link arm 27A, 27B ... Armrest 100 ... Detachable support device 110 ... Detachable part 120 ... Bearing part X1 ... First shaft center 130 ... Bearing part 190 ... Specific items (table)
DESCRIPTION OF SYMBOLS 140 ... Support means 141 ... Connection part 142 ... Support | pillar 143, 143B ... Caster X2 ... 2nd axis 150 ... Turning part 160 ... Horizontal moving part

Claims (7)

A chair bed that combines a chair and a bed,
A seat that contacts the buttocks of the person to be seated;
A backrest that is swingable with respect to the seat on the back side of the seat, and that contacts the back of the person;
A thigh receiving portion provided on the front side of the seat portion so as to be swingable with respect to the seat portion and contacting the human thigh;
The seat is provided substantially horizontally,
The backrest can be in a chair state that stands up with respect to the seat portion, can be in a bed state that is substantially horizontal with the seat portion, and swings between the chair state and the bed state. And can be fixed at any angle between them,
The thigh receiving portion may be in a normal state that is substantially horizontal with the seat portion, and may be in a special state in which the thigh is lifted from the seat portion and the thigh is bent from the waist portion of the person, and is independent of the backrest. A chair bed that can swing between the normal state and the special state and can be fixed at any angle between them,
An upper frame that supports the seat, the backrest and the thigh receiving part;
A lower frame that supports the upper frame and is provided with three or more casters at the lower end;
An elevating device provided between the upper frame and the lower frame and elevating the upper frame relative to the lower frame;
A link mechanism that is provided between the upper frame and the lower frame and that moves the upper frame up and down relative to the lower frame in cooperation with the lifting device;
The lifting device includes a motor, and a main body swingably provided on one of the upper frame and the lower frame, and a rod extending or shortening from the main body in a substantially horizontal direction by the rotation of the motor. A linear actuator having
The link mechanism is provided with a plurality of link levers having one end swingable relative to the other of the upper frame and the lower frame, and the other end swingable relative to the one. And a link arm provided integrally with at least one of the link levers, extending toward the one side while intersecting the direction in which the link lever extends, and having the rod swingably provided at the tip of the link lever. A chair bed characterized by having.   The chair bed according to claim 1, further comprising an armrest supported by the upper frame and capable of swinging in synchronization with swinging of the backrest. A detachable support device;
The detachable support device includes a detachable portion detachably attached to a lower portion of the front portion of the lower frame,
A bearing portion that is integrated with the detachable portion and is positioned at the center in the width direction when the detachable portion is attached,
A supported bearing portion that is pivotally supported in a range from one to the other in the width direction around a first axis extending vertically with respect to the bearing portion;
A support means that is integral with the supported part and can support a specific object used by the person;
The chair bed according to claim 1 or 2, wherein the bearing portion extends forward of the detachable portion. The bearing part and the bearing part are located below the front part of the lower frame,
The chair bed according to claim 3, wherein the support means includes a connecting portion that extends in parallel with the floor surface from the bearing portion, and a support column that extends upward from the connecting portion and has a caster at its lower end.   5. The chair bed according to claim 3, wherein the support means includes a rotating portion that is rotatable about a second axis extending vertically with respect to the support column.   The chair bed according to any one of claims 3 to 5, wherein the support means includes a horizontal moving portion that is horizontally movable with respect to the support column.   The chair bed according to any one of claims 3 to 6, wherein the specific object is at least one of a table, a display holding unit, an infusion device, and a dialysis device.

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