Bed apparatus and rehabilitation attachment

Abstract: In relation to a bed apparatus (19) having a lifting mechanism including sliders (4, 5), upright bars (6, 7), support members (8, 9) and side bars (10), a rail (67) is provided above the side bars (10) to be vertically movable with the side bars (10). A rehabilitation attachment (68) comprising a pulley (73) is movably provided on the rail (67). A rope (77) is extended along the pulley (73) provided on the rehabilitation attachment (68) so that a sick person or the like alternately pulls both ends of the rope (77) with his left and right hands for taking hand exercise, or engages his feet with one end of the rope (77) and pulls the other end with his hands for taking limb exercise.

Description: The present invention relates to a bed apparatus which comprises an exercise device for facilitating rehabilitation and also to such an exercise device which may be combined with such a bed apparatus. More particularly, it relates to a bed apparatus and an exercise device which are suitable for facilitating rehabilitation of a sick person, a physically handicapped person or a bed-ridden old person (hereinafter simply referred to as "sick person or the like") who is nursed at his home, for example. A bed-ridden state is not favourable for a sick person or the like to recover from illness or injury. In recent years, the importance of rehabilitation has been observed, and many reports have been made that it is advisable for a sick person or the like to take light exercise in order to recover sooner. JP-A-2215462 discloses a bed apparatus comprising a bed body having a longitudinal dimension and a cross-directional dimension; a pair of sliders mounted one on each end portion of said bed body to be slidable in the cross direction of said bed body for extending in the cross direction of said bed body upon such sliding movement; a pair of upright bars mounted one on each of said sliders so as to extend upwardly from said respective sliders; a pair of support means mounted one to each said upright bar for movement therealong and fixable at positions therealong; a pair of parallel side bars coupling said pair of support means with each other; and a rail coupling said pair of support means with each other and positioned above said pair of side bars. The support means and side bars form part of a lifting mechanism which can be used to lift or lower a person relative to the bed body and also to move the person to one side of the bed body. One object of the present invention is to provide a bed apparatus as defined in the last but one paragraph with an exercise device for facilitating rehabilitation of a sick person or the like. In this respect, the invention provides such a bed apparatus characterised in that it also comprises an exercise device supported on said rail for movement thereon and comprising a pulley wheel having an axis of rotation which is rotatable about a vertical axis. In the embodiment described hereinafter, the upright bars are mounted on said sliders for sliding movement relative thereto in at least the cross-direction of said bed body, whereby said upright bars are moveable to a position to a side of said bed body by (i) movement of said sliders in the cross-direction of said bed body and (ii) sliding movement of said upright bars relative to said sliders in the cross-direction of the bed body. The invention also provides an exercise device for, or in combination with, a bed apparatus for rehabilitation of a sick person or the like, comprising: at least one wheel rollably supported, in use, on a rail mounted to support means of the bed apparatus; an upper yoke rotatably supporting said wheel or wheels; a lower yoke mounted to be rotatable about a substantially vertical axis with respect to said upper yoke; and a pulley wheel supported for rotation about the central axis thereof by said lower yoke. The exercise device may further comprise means for fixing said upper yoke to said rail at a selected position thereon. The lower yoke may include hooks. In the embodiment the lower yoke comprises a pair of walls disposed opposite each other with a prescribed space between them, and said pulley wheel is rotatably supported by a shaft which is mounted on one of said walls. With the bed apparatus forming the embodiment of the present invention described hereinafter, a sick person or the like can take hand exercise and limb exercise. In use, the rail is brought into a position above the bed body on which the sick person or the like lies and a rope is extended around the pulley wheel, so that the sick person or the like can grasp the end portions of the rope with his left and right hands and alternately move his hands to take hand exercise. Similarly, a rope may be extended around the pulley wheel so that the sick person or the like can engage his feet with an end of the rope and grasp the other end thereof with his hands to raise up the feet by moving the hands, thereby taking limb exercise in a lying state. Further, the sick person or the like can take walking exercise. In this case, the pair of sliders are extended in the cross direction of the bed body and the positions of the two side bars are adjusted on the pair of upright bars, so that the sick person or the like can take walking exercise between the two side bars while grasping the same with his hands. It is possible to vertically adjust the rail and the pair of parallel side bars, so that they may serve as handrails, in response to the situation and the physical constitution of the sick person or the like. In order that the invention may be well understood, an embodiment thereof, which is given by way of example only, will now be described with reference to the accompanying drawings, in which: Fig. 1 is a front elevational view showing a bed apparatus; Fig. 2 is a plan view of the bed apparatus shown in Fig. 1; Fig. 3 is a left side elevational view of the bed apparatus shown in Fig. 1; Fig. 4 is a plan view showing a state wherein a pair of sliders extend fully from a bed body; Fig. 5 is a left side elevational view showing the state shown in Fig. 4; Fig. 6 is a left side elevational view showing a state wherein the sliders are fully retracted with respect to the bed body; Fig. 7 is a front elevational view showing a side bar in raised and lowered positions. Fig. 8 is a left side elevational view corresponding to Fig. 3, showing a mechanism for making one of the sliders slide relative to the bed body; Fig. 9 is a left side elevational view corresponding to Fig. 5, showing the mechanism shown in Fig. 8; Fig. 10 is a left side elevational view corresponding to Fig. 6, showing the mechanism shown in Fig. 8; Fig. 11 is a right side elevational view showing a support means; Fig. 12 is a plan view showing the support means shown in Fig. 11; Fig. 13 is a front elevational view showing the support means shown in Figs. 11 and 12; Fig. 14 is a longitudinal sectional view showing a sliding member of the support means shown in Figs. 11 to 13, and an upright member; Fig. 15 is an enlarged sectional view taken along the line XV - XV in Fig. 14; Fig. 16 is a front elevational view showing a hanger shovel; Fig. 17 is a right side elevational view showing the hanger shovel of Fig. 16; Fig. 18 is a plan view partially showing the hanger shovel of Figs. 16 and 17; Fig. 19 is a sectional view taken along the line XIX - XIX in Fig. 16; Fig. 20 is a front elevational view showing an exercise device; Fig. 21 is a sectional view taken along the line XXI - XXI in Fig. 20; Fig. 22 is a bottom plan view of the exercise device shown in Fig. 20; Fig. 23 is a perspective view showing a sick person or the like taking hand exercise; Fig. 24 is a perspective view showing the sick person or the like taking limb exercise; Fig. 25 is a perspective view showing the sick person or the like lifted by a hammock; Fig. 26 is a front elevational view showing the sick person or the like taking walking exercise with the side bars; and Fig. 27 is a left side elevational view illustrating the state shown in Fig. 26. Figs. 1 to 6 show the overall structure of a bed apparatus 1. Figs. 1 to 3 show a first state of the bed apparatus 1 and Figs. 4 and 5 show a second state thereof, while Fig. 6 shows a third state thereof. The bed apparatus 1 generally comprises a bed body 3 and a mattress 2 which is supported thereon. The bed body 3 is hinged so that it is possible to partially incline the mattress 2. Fig. 7 shows a partially inclined state of the mattress 2 with phantom lines. A pair of sliders 4 and 5 are mounted one on each end portion of the bed body 3, to be slidable in the cross direction of the bed body 3. Upon such sliding movement, the sliders 4 and 5 extend in the cross direction of the bed body 3, as most clearly shown in Figs. 4 and 5. A pair of upright bars 6 and 7 are mounted one on each of the sliders 4 and 5 to extend upwardly from the sliders 4 and 5 respectively. A pair of support means 8 and 9 are mounted one to each upright bar 6, 7 for movement therealong, and fixable at positions therealong. Two parallel side bars 10 and 11 are provided to couple the pair of support means 8 and 9 with each other. The bed apparatus 1 is now described in more detail. First, an arrangement for driving the slider 4 or 5 to slide in the cross direction of the bed body 3 is described. Figs. 8, 9 and 10, which correspond to Figs. 3, 5 and 6 respectively, show the first slider 4. The second slider 5 is provided with an arrangement which is substantially identical to that for the first slider 4. It is noted here that Figs. 8 to 10 are partially fragmented to facilitate easy understanding of the operation of the slider 4. The sliders 4 and 5, having L-shaped configurations, include vertically extending leg portions 12 and 13 and wheels 14 and 15 mounted on lower ends thereof. The sliders 4 and 5 are respectively driven to slide by traverse motors 16 and 17, which are fixed to the sliders 4 and 5 respectively. Mainly with reference to Figs. 8 to 10, the arrangement for driving the first slider 4 is now described. In the illustrated apparatus, the upright bar 6 is also moved on the slider 4 relative thereto upon sliding movement of the slider 4. An endless chain 18 is arranged on a horizontally extending portion of the slider 4. This endless chain 18 may be replaced by a belt or the like. The chain 18 extends around sprocket wheels 19 and 20, which are supported by the slider 4. Rotation of the motor 16 is transmitted to the first sprocket wheel 19 through a belt 21, for example. A fixture 22 is fixed at a prescribed position to the chain 18 on a lower path for the chain 18. This fixture 22 is also fixed at a prescribed position to a guide 23 which is provided on the bed body 3. When the rotation of the motor 16 is transmitted to the sprocket wheel 16 through the belt 21, and the chain 18 turns in response, the slider 4 slides along the guide 23 since the chain 18 is fixed to the guide 23 through the fixture 22. The sliding direction of the slider 4 can be varied with the direction of rotation of the motor 16. In such sliding movement of the slider 4, the wheel 14 rolls on a floor surface 24. Another fixture 25 is fixed at a prescribed position to the chain 18 on an upper path for the chain 18. This fixture 25 is also fixed to a base portion 26 of the upright bar 6. When the chain 18 turns in the aforementioned manner, therefore, the base portion 26 is displaced with respect to the slider 4, since the chain 18 is fixed to the base portion 26 through the fixture 25. When the slider 4 slides along the bed body 3, therefore, the upright bar 6 is displaced in the same direction on the slider 4. In this case, the amount of displacement of the slider 4 with respect to the bed body 3 is equal to that of the upright bar 6 with respect to the slider 4. In the state shown in Fig. 8, the upright bar 6 is located at the cross-directional center of the bed body 3. In this state, the slider 4 extends slightly sidewardly from the bed body 3. When the slider 4 extends fully sidewardly from the bed body 3 as shown in Fig. 9, the upright bar 6 is in a position close to the leg portion 12 on the slider 4. The upright bar 6 is moved through twice the displacement of the slider 4 with respect to the bed body 3. Thus, it is possible to sufficiently separate the upright bar 6 sidewardly from the bed body 3 while reducing the amount of extension of the slider 4 from the bed body 3 over that necessary if the upright bar were fixed to the slider. When the slider 4 is further retracted towards the bed body 3 as shown in Fig. 10, on the other hand, the upright bar 6 is brought into a position to a side of the bed, close to the motor 16 on the slider 4. The state shown in Fig. 10 is generally implemented when the aforementioned side bars 10 and 11 are not used, thus protecting the sick person or the like, who is laid on the bed body 3, against oppressive moods caused by the proximity of side bars 10 and 11, the support means 8 and 9 and the upright bars 6 and 7. The support means 8 or 9 is now described in detail. The support means 8 and 9 mirror each other in structure. The support means 8 comprises a sliding member 27 which is movable along a related upright bar 6. The relation between the sliding member 27 and the upright bar 6 is described later with reference to Figs. 14 and 15. A bracket 28 having a U-shaped section, for example, is fixed to the sliding member 27. This bracket 28 is also shown in Fig. 15, as described later. A pair of arms 29 and 30 are mounted on the bracket 28. These arms 28 and 29 oppositely extend from the bracket 28 in the cross direction of the bed body 3. As shown by phantom lines in Fig. 11, the arms 29 and 30 are upwardly rotatable about pins 31 and 32 with respect to the bracket 28. Further, the sliding member 27 rotatably holds two hook links 33 and 34 by a common pin 35. Hook portions 36 and 37 are provided on respective free ends of the hook links 33 and 34. On the other hand, engaging pins 38 and 39, which are engageable with the hook portions 36 and 37 respectively, are provided on respective free ends of the arms 29 and 30. When the arms 29 and 30 are upwardly rotated as shown by phantom lines in Fig. 11, the hook portions 36 and 37 of the hook links 33 and 34 engage with the engaging pins 38 and 39 respectively, to fix the arms 29 and 30 in the upwardly rotated state. The two side bars 10 and 11 are mounted on the arms 29 and 30 respectively. Thus, the side bars 10 and 11 can be located at upper and lower positions, following the aforementioned rotation of the arms 29 and 30. Fig. 11 shows the lower and upper positions of the side bars 10 and 11 with solid and phantom lines. Fig. 6, above described, shows a state corresponding to the state shown with the phantom lines in Fig. 11. The side bars 10 and 11 are thus brought into the upper positions to protect the sick person or the like, who is laid on the bed body 3, against oppressive moods, as well as to facilitate medical examination of the sick person or the like with no hindrance. Further, it is also possible to facilitate an operation for partially raising the bed body 3 as shown in Fig. 7, by bringing the side bars 10 and 11 to the upper positions as shown with the phantom lines in Fig. 11. While Figs. 11 to 13 show the first support means 8, Figs. 1 to 7 show the second support means 9. Elements of the second support means 9 which mirror those of the first support means 8 are denoted by the same reference numerals with subscripts "a", to omit redundant description. As shown, the positions of the side bars 10 and 11 are adjustable along the arms 29, 29a, 30 and 30a. Clamps 40 and 41 having U-shaped sections are mounted on respective end portions of the side bars 10 and 11, and the arms 29 and 30 have T-shaped sections. Further, guide blocks 42 and 43 for holding lower portions of the arms 29 and 30 having the T-shaped sections are mounted on the clamps 40 and 41, as shown in Fig. 13 with reference to the clamp 40. Thus, the clamps 40 and 41, which are moveable along the arms 29 and 30, are inhibited from displacement laterally of the arms 29 and 30. The clamps 40 and 41 are provided with clamp screws 44 and 45 respectively. These clamp screws 44 and 45 are tightened so as to fix the positions of the clamps 40 and 41 on the arms 29 and 30. The aforementioned structure is also employed on the other ends of the side bars 10 and 11 respectively. Thus, the distance between the pair of side bars 10 and 11 can be varied by varying the positions of the side bars 10 and 11 with respect to the arms 29 and 30. For example, the distance between the side bars 10 and 11 shown in Fig. 2 is greater than that shown in Fig. 4. The distance between the side bars 10 and 11 may thus be changed in response to the physical constitution of the sick person or the like, for example, as hereinafter described. A structure for making the support means 8 or 9 moveable along the upright bar 6 or 7 and fixable at positions therealong is now described. Fig. 14 is a longitudinal sectional view showing the sliding member 27 which is included in the first support means 8 and the related upright bar 6. Fig. 15 is an enlarged sectional view taken along the line XV - XV in Fig. 14. As to the relation between the sliding member 27a which is included in the second support means 9 and the upright bar 7 related thereto, a structure (not shown) which mirrors that shown in Figs. 14 and 15 is employed. Therefore, only the relation between the sliding member 27 which is included in the first support means 8 and the related upright bar 6 is described in detail. Referring to Figs. 14 and 15, the upright bar 6 has a C-shaped section to receive the sliding member 27 and to enable mounting of the bracket 28 (Fig. 15) on the sliding member 27. A lead screw 46 is arranged in the upright bar 6, to be rotatable about its central axis. Fig. 14 shows brackets 47 and 48 for rotatably holding both ends of the lead screw 46. The base portion 26 of the upright bar 6 has a hollow structure, to contain a motor 49 for vertical movement of the support means 8. This motor 49 is reciprocably rotatable. Rotation of the motor 49 is transmitted to the lead screw 46 through successive gears 50, 51 and 52. A female screw block 54 is fixed to the sliding member 27 through a mounting plate 53. This female screw block 54 is provided with a female screw thread, which is engaged with the lead screw 46. When the lead screw 46 is rotated upon rotation of the motor 49, therefore, the sliding member 27 is vertically moved. When the motor 49 is stopped, the lead screw 46 is also stopped, whereby the sliding member 27 is fixed in its position. Fig. 15 shows some elements for smoothly guiding the movement of the sliding member 27 within the upright bar 6. A plurality of rotatable guide rollers 55, 56, 57 and 58 and guide shoes 59 and 60 are supported by the sliding member 27. The guide rollers 55 to 58 and the guide shoes 59 and 60 come into contact with the inner surface of the upright bar 6 from various directions, thereby facilitating smooth vertical movement of the sliding member 27 within the upright bar 6. Although Fig. 15 shows four guide rollers 55 to 58 and two guide shoes 59 and 60, appropriate numbers of such guide rollers and guide shoes (not shown) may be vertically distributed along the sliding member 27. The bracket 28 of the support means 8 is mounted on the lower end of the sliding member 27. The lower end of the sliding member 27 is moveable to downwardly project from the upright bar 6 beyond the gear 52 and the lower end of the upright bar 6. The support means 8, may thus be positioned as shown by phantom lines in Fig. 5. Figs. 1 to 5 illustrate hanger shovels 61 engaged with the side bars 10 and 11. These hanger shovels 61 are adapted to raise the sick person or the like in a lying condition. Figs. 16 to 19 show the structure of each hanger shovel 61 in detail. The illustrated hanger shovel 61 is formed of a relatively rigid material such as hard plastic, aluminum or stainless steel, for example. The hanger shovel 61 is curved to provide a substantially L-shaped configuration, and provided with a hook portion 62 which is engageable with the side bar 10 or 11. A plurality of ribs 63 are distributed on the hanger shovel 61, in order to ensure at least a prescribed level of strength while reducing the thickness and weight. As clearly shown in Fig. 19, such ribs 63 are preferably formed to have rounded sections. In use, horizontally extending bottom portions 64 of the hanger shovels 61 are inserted under the body of the sick person or the like, who is laid on the bed body 3. In this case, the hanger shovels 61 are distributed on both sides of the body of the sick person or the like according to the weight of the sick person or the like. The height of and the distance between the side bars 10 and 11 are adjusted in accordance with the positions of the hook portions 62 of the hanger shovels 61. Then, the hook portions 62 of the hanger shovels 61 are made to engage with the respective side bars 10 and 11. The hanger shovels 61 can be inserted under the body of the sick person or the like, without raising him. After the hook portions 62 of the hanger shovels 61 engage with the side bars 10 and 11, the side bars 10 and 11 are displaced to move the sick person or the like to a desired position. Typical states of the bed apparatus 1 in use are now described with reference to Figs. 1 to 6. With the sliders 4 and 5 and the upright bars 6 and 7 in the state shown in Figs. 1 to 3, the sick person or the like who is laid on the mattress 2 is raised and the hook portions 62 of the hanger shovels 61 inserted under his body. The support means 8 and 9 and the side bars 10 and 11 are then lowered from the state shown in Figs. 1 to 3, to positions engageable with the hook portions 62 of the hanger shovels 61. Further, the distance between the pair of side bars 10 and 11 is adjusted according to the physical constitution of the sick person or the like. This distance adjusted only during an initial stage of employment of the bed apparatus 1. Then, the support means 8 and 9, and thus the side bars 10 and 11, are raised so that the hanger shovels 61 are separated from the mattress 2. A bed sheet or the like, which is spread on the mattress 2, may be exchanged in this state, and the bed apparatus 1 may be returned to its former state after such exchange. Operation for moving the sick person or the like sidewardly from the bed body 3 for bathing him, for example, is now described. In this case, the sliders 4 and 5 are fully extended sidewardly from the bed body 3, as shown in Figs. 4 and 5. Thus, the sick person or the like is moved sidewardly from the bed body 3 at a constant height. Then, the support means 8 and 9 and the side bars 10 and 11 are lowered, thereby lowering the sick person or the like at a position adjacent the side of the bed body 3. The illustrated apparatus is so designed that the support means 8 and 9 can be lowered to bring the sick person or the like into contact with the floor surface 24, as shown by phantom lines in Fig. 5. The sick person or the like thus placed on the floor is then brought into a bathtub for bathing. In the state shown in Figs. 4 and 5, the vertical position of the support means 8 and 9 may be selected in response to the type of care required for the sick person or the like. For example, the sick person or the like may be temporarily placed on the floor in an operation similar to that described above, but a bathtub may be arranged immediately under the side bars 10 and 11 in the state shown in Figs. 4 and 5, so that the sick person or the like can be brought into the bathtub at an intermediate position of the side bars 10 and 11. The above operation may be carried out in reverse to return the sick person or the like onto the bed body 3. When the support means 8 and 9 and the side bars 10 and 11 are not in use, as shown in Fig. 6, it is preferable to slide the sliders 4 and 5 further towards the bed body 3 while moving the upright bars 6 and 7 towards a side of the bed body 3. Preferably, the arms 29a and 30a (and 29 and 30) are fixed in an upwardly rotated state, to raise the side bars 10 and 11. The bed apparatus 1 having such a lifting mechanism, comprising the pair of support means 8, 9 mounted one to each upright bar 6, 7, the pair of parallel side bars 10, 11 and the rail 67, is further provided with an exercise device 68 for rehabilitation. Figs. 1, 2, 4 and 7 illustrate a rail 67 which couples the pair of support means with each other. As shown in Figs. 11 to 14, each end of the rail 67 is fixed to a respective sliding member 27 or 27a included in the support means 8 or 9. This rail 67 is positioned above the two side bars 10 and 11, and is vertically moveable with the sliding members 27 and 27a along the upright bars 6 and 7. The exercise device 68 is supported for movement on the rail 67. Figs. 20 to 22 illustrate this exercise device 68 in an enlarged manner. The exercise device 68 comprises, for example, two wheels 69 which are rollably supported, in use, on the rail 67. These wheels 69 are rotatably supported by an upper yoke 70. A lower yoke 71 is located under the upper yoke 70 and coupled thereto by a rivet 72. This rivet 72 enables rotation of the lower yoke 71 about a vertical axis with respect to the upper yoke 70. The lower yoke 71 rotatably supports a pulley wheel 73. As clearly shown in Figs. 20 to 24, the pulley wheel 73 is rotatable about a central axis thereof and is also supported so that it is rotatable with the lower yoke 71. Thus the pulley wheel 73, and thus also the axis of rotation of the pulley wheel, are rotatable about the vertical axis defined by the rivet 72. The upper yoke 70 may be provided with a mechanism for fixing the exercise device 68 relative to the rail 67 when required. Such a mechanism is provided by a brake lever 74, for example, so that an eccentric shaft 75, which is provided on this lever 74, clamps the rail 67 between the same and the wheels 69 when the brake lever 74 is rotated as shown by phantom lines in Fig. 20, thereby fixing the exercise device 68 to a selected position on the rail 67. The lower yoke 71 preferably includes hooks 76 at both end portions thereof. A method of using the hooks 76 is described later with reference to Fig. 25. For the purpose of rehabilitation, a rope 77 is extended around the pulley wheel 73 as shown by phantom lines in Fig. 20, for example. As clearly shown in Fig. 21, a cantilever shaft 78, rotatably supporting the pulley wheel 73 on its central axis, is supported on a wall of the lower yoke 71, whereby the rope 77 can be easily mounted on or detached from the pulley wheel 73. Fig. 23 shows a sick person 100 or the like taking hand exercise. Hand grips 79 and 80 are mounted on both ends of the aforementioned rope 77. As shown in Fig. 23, the sick person 100 or the like grasps the hand grips 79 and 80 with his left and right hands 81 and 82 and alternately moves the hands 81 and 82 to take hand exercise. Referring to Fig. 23, the pulley wheel 73 has rotated about the vertical axis to follow the direction of extension of the rope 77, whereby the longitudinal axis of the lower yoke 71 is perpendicular to the rail 67. Fig. 24 shows the sick person 100 or the like, taking limb exercise. An end of the aforementioned rope 77 is provided with a belt 85, which can be engaged with both feet 83 and 84 of the sick person 100 or the like. The other end of the rope 77 is provided with a hand grip 86 to be grasped by the hands 81 and 82 of the sick person 100 or the like. The sick person 100 or the like engages his feet 83 and 84 with the belt 85, grasps the handgrip 86 with his hands 81 and 82 and moves the hands 81 and 82 to raise up his feet 83 and 84. Thus, the sick person 100 or the like can take limb exercise. The sick person 100 or the like can choose to engage only one of his feet 83 and 84, or grasps the hand grip 86 with only one of his hands 81 and 82, to take exercise. Referring to Fig. 24, the pulley wheel 73 has rotated about the vertical axis to follow the direction of extension of the rope 77, whereby the longitudinal axis of the lower yoke 71 is parallel to the rail 67. The position of the exercise device 68 relative to the rail 67 for the exercise shown in Fig. 23 is different from that for the exercise shown in Fig. 24. The wheels 69 roll on the rail 67 to achieve such positional change. While the sick person 100 or the like takes either exercise, however, it is not necessary to move the exercise device 68 along the rail 67. Therefore, the exercise device 68 may be temporarily fixed to the rail 67 through the brake lever 74. Additional means (not shown) may be provided for preventing rotation of the lower yoke 71 with respect to the upper yoke 70 when required. The vertical position of the rail 67 can be adjusted in a stepless manner by vertical movement of the sliding members 27 and 27a. Thus, the vertical position of the exercise device 68 can also be adjusted in a stepless manner. Therefore, it is easy to properly adjust the vertical position of the exercise device 68 according to the physical constitution or the condition of the sick person 100 or the like to take the exercise shown in Fig. 23 or 24. The exercise device 68 may be driven to reciprocate vertically by the motor 49, for facilitating hand or limb exercise. Such exercise is advantageous when the sick person 100 or the like cannot move his hands and/or feet unaided. The exercise device 68 can also be used for suspending a hammock 87, as shown in Fig. 25. This hammock 87 is adapted to lift the sick person 100 or the like in a sitting state to relieve himself or to move him into a wheelchair, for example. Belt portions 88 of the hammock 87 are engaged with the hooks 76 which are provided on the lower yoke 71. The lower yoke 71 is substantially elongate to ensure a relatively large distance between the hooks 76 at its ends, whereby the upper portion of the hammock 87 is not twisted. Thus, the sick person 100 or the like is prevented from cramp to some extent when he is held by the hammock 87. Figs. 26 and 27 illustrate the sick person 100 or the like taking walking exercise. In this case, the bed apparatus 1 is brought into the following state: First, the pair of sliders 4 and 5 slide to extend fully in the cross direction of the bed body 3, as shown in Figs. 26 and 27. As shown, the upright bars 6 and 7 are also moved in the same direction. This state corresponds to that shown in Figs. 4 and 5. The positions of the pair of support means 8 and 9 are adjusted along the upright bars 6 and 7. Thus, the vertical positions of the two parallel side bars 10 and 11 are adjusted to those optimum for the situation or the physical constitution of the sick person 100 or the like taking walking exercise. Further, the distance between the side bars 10 and 11 may also be adjusted. The hanger shovels 61 (Fig. 2, for example) are removed from the side bars 10 and 11. Following such adjustment, the sick person 100 or the like stands between the two side bars 10 and 11 and grasps the same with his hands to take walking exercise. In this case, the hammock 87 shown in Fig. 25 may be suspended from the exercise device 68 to hold the sick person 100 or the like. Thus, the sick person 100 or the like can put out his feet from the hammock 87 and move them on the floor to take walking exercise. When the sick person 100 or the like gets tired during such walking exercise, he can take a seat on a chair. Such a chair may be provided by a stool type moveable chamber pot, for example. From the foregoing description of the illustrated apparatus 1, it will be appreciated that it is possible to use the bed apparatus for various purposes by utilizing the lifting mechanism for lifting or lowering the sick person or the like and mounting the exercise device 68 on the bed apparatus so that the bed apparatus fulfils its original function as a bed and the lifting mechanism serves as a lift for the sick person or the like while this equipment can also be used for rehabilitation. Such a multifunctional bed apparatus occupies a relatively small space for its functions, so that it can be used in an ordinary house, which is generally restricted in space, with no problem. Using the illustrated bed apparatus and exercise device it is possible to nurse a sick person or the like using a single bed apparatus over a relatively long period of time. When the sick person or the like is confined to his bed, the lifting mechanism fulfils its function for lifting him for defecation, bathing, change of sheets or the like. In this case, not only the two side bars 10, 11 included in the lifting mechanism but also the rail 67 or the exercise device 68 can be used for lifting the sick person or the like as necessary. When the sick person or the like can move his limbs, he can take hand exercise and limb exercise with the exercise device 68. When the sick person or the like is ambulatory, he can take walking exercise in safety while grasping the two side bars 10, 11. The sick person or the like can take hand or limb exercise on the bed body or walking exercise in the vicinity of the bed body. Therefore, the sick person or the like can safely take such exercise by himself, and a large space is not required for such rehabilitation. Because the axis of rotation of the pulley wheel is rotatable about a vertical axis, the pulley wheel is at an optimum angle following the direction of extension of the rope. Therefore, it is possible to prevent the rope from undesirable displacement in relation to the pulley wheel 73. Although the illustrated bed apparatus and exercise device have been described and illustrated in detail, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the scope of the present invention being limited only by the terms of the appended claims.

Claims: A bed apparatus (1) comprising: a bed body (3) having a longitudinal dimension and a cross-directional dimension; a pair of sliders (4, 5) mounted one on each end portion of said bed body (3) to be slidable in the cross direction of said bed body (3) for extending in the cross direction of said bed body upon such sliding movement; a pair of upright bars (6, 7) mounted one on each of said sliders (4, 5) so as to extend upwardly from said respective sliders (4, 5); a pair of support means (8, 9) mounted one to each said upright bar (6, 7) for movement therealong and fixable at positions therealong; a pair of parallel side bars (10, 11) coupling said pair of support means (8, 9) with each other; and a rail (67) coupling said pair of support means (8, 9) with each other and positioned above said pair of side bars; characterised in that said bed apparatus (19) also comprises an exercise device (68) supported on said rail (67) for movement thereon and comprising a pulley wheel (73) having an axis of rotation which is rotatable about a vertical axis. A bed apparatus (1) as claimed in claim 1, wherein said upright bars (6, 7) are mounted on said sliders (4, 5) for sliding movement relative thereto in at least the cross-direction of said bed body (3), whereby said upright bars (6, 7) are moveable to a position to a side of said bed body (3) by (i) movement of said sliders (4, 5) in the cross-direction of said bed body (3) and (ii) sliding movement of said upright bars (6, 7) relative to said sliders (4, 5) in the cross-direction of said bed body. An exercise device (68) for, or in combination with, a bed apparatus for rehabilitation of a sick person or the like, comprising: at least one wheel rollably supported, in use, on a rail (67) mounted to support means (8, 9) of the bed apparatus; an upper yoke (70) rotatably supporting said wheel or wheels (69); a lower yoke (71) mounted to be rotatable about a substantially vertical axis with respect to said upper yoke (71); and a pulley wheel (73) supported for rotation about the central axis thereof by said lower yoke (71). A bed apparatus as claimed in claim 1 or 2, wherein said exercise device (68) comprises: at least one wheel rollably supported, in use, on said rail (67) mounted to support means (8, 9) of said bed apparatus; an upper yoke (70) rotatably supporting said wheel or wheels (69); and a lower yoke (71) mounted to be rotatable about a substantially vertical axis with respect to said upper yoke (71), said pulley wheel being supported for rotation about said axis of rotation thereof by said lower yoke (71). An exercise device (68) as claimed in claim 3 or a bed apparatus as claimed in claim 4, further comprising means (74) for fixing said upper yoke (70) to said rail (67) at a selected position thereon. An exercise device (68) as claimed in claim 3 or 5 or a bed apparatus as claimed in claim 4 or 5, wherein said lower yoke (71) includes hooks (76). An exercise device (68) as claimed in any one of claims 3, 5 or 6 or a bed apparatus as claimed in any one of claims 4 to 6, wherein said lower yoke (71) comprises a pair of walls disposed opposite each other with a prescribed space between them, and said pulley wheel (73) is rotatably supported by a shaft (78) which is mounted on one of said walls.

Inventors: KASSAI KENZOU, KASSAI, KENZOU
Applicants: KASSAI KENZOU, KASSAI, KENZOU
Application year: 1992
Main classification: A61G7
IPC codes: A61G7, A63B21, A61H1