JP2006340962A - Electric bed - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric bed capable of preventing a user of the bed from feeling pressure when the back is raised by a simple structure, and preventing the displacement of the user. <P>SOLUTION: When a back bottom 12 is in the horizontal state, a rotation shaft 11 is located higher than the back bottom 12. Accordingly, the rotation shaft 11 is at a position closer to the waist of the bed user than an end (a connection shaft 16) of the back bottom 12 when the bed user lies on the back on a mattress. Accordingly, when the back bottom 12 is rotated in the direction of rising, the upper half body of the bed user is rotated around the waist region, but the bed user does not feel much pressure because the the back bottom 12 is also rotated around the rotation shaft 11 located close to the waist region of the bed user. Furthermore, the displacement of the bed user in the longitudinal direction of the bed is reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric bed in which a back bottom can be rotated to raise its back, and more particularly, to an electric bed that can prevent the body of a person lying on the bed from being pressed or displaced when the back is raised.

  The electric bed is used as a medical couch device to raise or lower the back bottom by driving the actuator to change the position of a bedridden patient and to assist the patient who can move to some extent by himself / herself. Can be done. In addition to medical beds, there is also an electric bed that can be raised and lowered in the general bed so that the bed user can watch TV or read while lying on the bed. .

  In these electric beds, a back bottom, a waist bottom, a knee bottom, a foot bottom, and the like are connected, and a mattress is laid on these bottoms. Normally, the back bottom is turned up in the direction of raising the back bottom, and the back bottom is turned up. In the lowering operation of lowering the back bottom, the back bottom is turned up. The waist bottom is normally fixed, and the foot bottom is driven up and down as the knee bottom moves up and down.

  In this case, a mattress is provided on each bottom, and a bed user sleeps on the mattress. For this reason, when the back bottom of the electric bed is rotated in the direction to rise, the center position of the waist, which is the rotation fulcrum of the bed user, is considerably above the rotation fulcrum of the back bottom. For this reason, when the back bottom is raised (rotated in a standing direction), the upper body on the back bottom is pushed out to the leg side and the body is displaced. In addition, as the back bottom rises, a feeling of pressure is generated in the body.

  An example of the electric bed that prevents the feeling of pressure on the abdomen is disclosed in Patent Document 1. The electric bed described in Patent Document 1 drives the back bottom up and down by one actuator, and drives the foot bottom up and down in conjunction with the driving of the back bottom by a link mechanism. It is. In this electric bed, when the back is raised, the back bottom moves slightly away from the foot bottom and moves backward, but the mechanical pivot is lower than when the back bottom is in a horizontal state.

  Moreover, there exists what was described in patent document 2 as an electric bed which suppressed the shift | offset | difference of a body and the pressure to a body at the time of back raising. The electric bed described in Patent Document 2 is such that the lower end of the back frame frame that supports the back bottom is moved along an arcuate guide path, and the rotation fulcrum is the arcuate guide. By moving along the road, the body is prevented from being compressed and displaced.

JP 2001-321407 A JP 2000-140039 A

  However, in the electric bed described in Patent Document 1, the back bottom gradually moves away from the foot bottom and moves to the standing position while moving away from the foot bottom. Is lower than the back bottom, and therefore, the feeling of pressure and displacement for the bed user during the back raising operation is not sufficient, and the link mechanism for performing the operation is complicated.

  In the electric bed described in Patent Document 2, the mechanism for moving the lower end of the back frame frame supporting the back bottom along the arcuate guide path is complicated. For this reason, the number of necessary parts is large, and since links are used, it is difficult to ensure rigidity.

  The present invention has been made in view of the above problems, and provides an electric bed that has a simple structure and prevents a bed user from feeling pressured during a back-up operation and can prevent the displacement. With the goal.

  The electric bed according to the present invention comprises a back bottom, a pivot fulcrum that is positioned above the back bottom and rotatably supports the back bottom when the back bottom is in a horizontal position, and the back bottom. And a drive device that rotates around the rotation fulcrum.

  The electric bed further includes a frame and a support portion fixed to the frame and provided with the rotation fulcrum, and the support portion preferably protrudes upward from the frame.

  In addition, the driving device includes an actuator having a base portion rotatably supported by the frame and a piston tip portion connected to the back bottom, and the support portion that rotatably supports the base portion of the actuator is the rotation portion. It can comprise so that it may be located below a dynamic fulcrum.

  And a knee bottom and a foot bottom that are rotatably supported by the frame, and another actuator having a base portion rotatably supported by the frame and a piston tip connected to the knee bottom and / or the foot bottom. The knee bottom and / or the foot bottom may be rotationally driven by the other actuator.

  Furthermore, the end portion of the back bottom and the rotation fulcrum may be connected by a link, or may be connected by a rod-like connecting member serving as a grip.

  The support portion is provided with a cover that covers the support portion, and a top surface of the cover is provided with a hole for removably supporting a rotatable grip or a fence. You can also.

  According to the present invention, the rotation fulcrum of the back bottom is located above the back bottom when the back bottom is in the horizontal position, so that the bed user can place the top on the back bottom via a mattress or the like. When sleeping, the pivot point becomes close to the waist of the bed user. Therefore, when the back bottom rotates in the direction in which the back bottom rises, the bed user turns the upper body around the position of the waist and tries to get up, but the back bottom also rotates at a position close to the waist position. Since it rotates as a moving fulcrum, it is suppressed that the back bottom presses the back of the bed user, the feeling of pressure on the bed user is reduced, and the shift of the bed user when the back bottom is raised is also reduced.

  According to the present invention, the bed user's feeling of pressure during a back-up operation has a very simple structure in which the rotation fulcrum of the back bottom is simply positioned above the position when the back bottom is in a horizontal state. And misalignment can be reduced.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a front view showing an electric bed according to the first embodiment of the present invention, FIG. 2 is a view showing a rotation fulcrum of its back bottom, FIG. 3 is a view showing its operation, and FIG. It is a perspective view shown. The carriage frame 1 is composed of a pair of vertical bars extending in the longitudinal direction of the bed and at least one pair of horizontal bars connecting the vertical bars. On the pair of vertical bars of the carriage frame 1, the first link 3a and the second link An X-shaped link mechanism in which the two links 3b are connected to each other by a rotating shaft 3c is provided. And the raising / lowering frame 2 is installed on this X-shaped link mechanism. Similarly to the carriage frame 1, the elevating frame 2 is also composed of a pair of vertical bars extending in the longitudinal direction of the bed and at least a pair of horizontal bars 2a connecting the vertical bars to each other. The lower end of the first link 3a is rotatably connected to the vertical bar of the carriage frame 1 by a rotary connecting portion 4a, and the upper end of the second link 3b is a rotary connecting portion (not shown) to the vertical bar of the elevating frame 2. It is connected so that it can rotate. Further, the upper end of the first link 3a is supported by a slide connecting portion 4b provided on the vertical bar of the elevating frame 2 so as to slide slightly in the bed longitudinal direction and to rotate. The lower end of the second link 3b is also supported by the vertical bar of the carriage frame 1 so as to be rotatable and slidable by a slide connecting portion (not shown). A base portion of the actuator 40 is rotatably connected to and supported by the elevating frame 2, and a piston 40 a is rotatably connected to a link 42 connected to the rotating shaft 3 c by a rotation fulcrum 41. Thus, when the piston 40a advances by driving the actuator 40, the rotating shaft 3c is pressed to the bed head side (left side in FIG. 1), and the angle formed above and below the first link 3a and the second link 3b becomes small. The first link 3a and the second link 3b are rotated so that the width of the X link is narrowed, and the elevating frame 2 is raised. On the other hand, when the piston 40a of the actuator 40 is retracted, the first shaft 3a and the second link 3b are rotated so that the rotation shaft 3c is pulled toward the leg portion of the bed and the width of the X link is widened, and the lifting frame 2 goes down.

  A pair of vertical bars of the elevating frame 2 is provided with a support portion 10 for the back bottom 12, and a rotating shaft 11 (rotation fulcrum) of the back bottom 12 is provided on the upper portion of the support portion 10. Yes. As shown in FIG. 2, the rotating shaft 11 is positioned above the back bottom 12 when the back bottom 12 is in a horizontal state. The back bottom 12 is fixedly connected to one end of the link 12a via the connecting shaft 18 so that the angle formed by the back bottom 12 and the link 12a is unchanged, and the other end of the link 12a is connected to the rotary shaft 11. Is rotatably supported. The back bottom 12 is composed of a pair of bars and a plurality of (three in the illustrated example) support plates 13a, 13b, 13c installed on the bars, as shown in FIG. The pair of bars of the back bottom 12 is disposed in the vicinity of the vertical bar of the frame 2, and the pair of bars of the back bottom 12 is fixed to one connecting shaft 18. Then, both end portions of the connecting shaft 18 are fixed to one end portions of the pair of links 12a.

  Further, a support shaft 16 of the actuator 14 is fixed to the lifting frame 2, and a bracket 15 is fixed to the support shaft 16, and a base portion of the actuator 14 is rotatably connected to a lower portion of the bracket 15, It is supported. The piston 14 a of the actuator 14 is rotatably connected to the distal end portion of the back bottom 12 via the rotation shaft 17. As a result, when the piston 14a of the actuator 14 advances, the piston 14a pushes up the back bottom 12 to rise, and the back bottom 12 rotates about the rotation shaft 11 as a rotation center. On the other hand, when the piston 14a of the actuator 14 is retracted, the piston 14a pulls back the back bottom 12, and the back bottom 12 returns to the horizontal position. Thereby, a back raising operation and a back lowering operation are performed. In this case, the rotary shaft 11 is positioned above the back bottom 12 when the back bottom 12 is in the horizontal position. Therefore, the back bottom 12 rotates using the rotary shaft 11 provided above as a rotation fulcrum. .

  On the other hand, on the elevating frame 2, a knee bottom 22 and a foot bottom 23 are rotatably connected to each other by a connecting shaft 24. The knee bottom 22 is rotatably connected to a support portion 20 installed on the frame 2 by a rotation shaft 21. The knee bottom 22 and one end of the link 26 are connected to each other by a rotary shaft 33 so as to be rotatable and slidable. The other end of the link 26 and the frame 2 are connected to each other by a rotary shaft 28 so as to be rotatable. Further, the foot bottom 23 and one end of the link 27 are rotatably connected by a rotating shaft 25, and the other end of the link 27 and the frame 2 are rotatably connected by a rotating shaft 29. Further, one end portion of the link 32 is rotatably connected to the intermediate portion of the link 26. An actuator 30 is fixed to the frame 2, and the tip of the piston 30 a of the actuator 30 is connected to the other end of the link 32 via a rotating shaft 31. As a result, when the piston 30a of the actuator 30 advances, the link 32 connected via the rotary shaft 31 pushes up the link 26 and rotates the link 26 upward about the rotary shaft 28. As a result, the knee bottom 22 rotates in the direction of rising around the rotation shaft 21, and the foot bottom 23 moves upward in conjunction with the rotation. Since both ends of the foot bottom 23 are chain-connected by the knee bottom 22, the link 26, the portion between the rotation shafts 28 and 29 of the frame 2 and the link 27, the lengths of these chain-shaped portions are as follows. Is appropriately set, the foot bottom 23 can be raised while maintaining a horizontal state when the leg bottom 23 is rotated in the direction in which the knee bottom 22 rises. When the knee bottom 22 is rotated in the horizontal direction, the foot bottom 23 descends and returns to the position of the frame 2, and the knee bottom 22 and the foot bottom 23 become horizontal.

  A waist bottom (not shown) is fixed horizontally at a position between the back bottom 12 and the knee bottom 22 in the frame 2 as necessary. Therefore, when the back bottom 12 and the knee bottom 22 are in a horizontal state, the back bottom 12, the waist bottom, the knee bottom 22 and the foot bottom 23 are positioned on the same horizontal plane. When the back bottom 12 and the knee bottom 22 are lifted, the waist portion of the bed user is held as it is by the stationary waist bottom.

  Next, the operation of the electric bed of the present embodiment configured as described above will be described. As the piston 40a of the actuator 40 advances, the link mechanism composed of the first link 3a and the second link 3b rotates so as to be narrowed, and the elevating frame 2 is raised. On the other hand, when the piston 40a of the actuator 40 is retracted, the link mechanism including the first link 3a and the second link 3b is rotated so as to expand, and the elevating frame 2 is lowered.

  Further, when the piston 14a of the actuator 14 advances, as shown in FIG. 3, the back bottom 12 rotates around the rotating shaft 11 and gets up. On the other hand, when the piston 14a of the actuator 14 is retracted, the back bottom 12 rotates about the rotation shaft 11 in the direction of falling as shown in FIG.

  Further, when the piston 30a of the actuator 30 advances, the knee bottom 22 rotates in the direction in which it rises, and in conjunction with this, the foot bottom 23 rises while maintaining a horizontal state. On the other hand, when the piston 30a of the actuator 30 is retracted, the knee bottom 22 is rotated in a tilting direction, and the foot bottom 23 is lowered in conjunction therewith.

  Thus, in the present embodiment, as shown in FIG. 2, when the back bottom 12 is in a horizontal state, the rotation shaft 11 is positioned above the back bottom 12. For this reason, when a mattress is laid on each bottom and the bed user lies on his / her back, the rotary shaft 11 is positioned at the waist of the bed user rather than the end of the back bottom 12 (the connecting shaft 16). Close to the position. For this reason, when the back bottom 12 rotates in the upward direction, the upper body of the bed user rotates around its waist, but the back bottom 12 also centers around the rotation axis 11 close to the position of the bed user's waist. Since it rotates, there is little feeling of pressure given to the bed user, and there is little shift in the bed longitudinal direction of the bed user. If a mattress is laid on the back bottom 12, and the center position of the waist in consideration of the thickness of the bed user lying on his back coincides with the position of the rotary shaft 11, the bed user Since the upper body and the back bottom 12 rotate about the same rotation axis, the back bottom 12 does not press the bed user in the longitudinal direction of the bed, and the bed user does not feel any pressure. However, since the rotating shaft 11 is provided on the upper part of the support part 10 standing on both sides of the bed, when the support part 10 protrudes upward from the upper surface of the mattress, the support part 10 becomes an obstacle to the bed user. For this reason, it is preferable that this support part 10 does not protrude upward from the surface of the mattress of the bed, but even in that case, as long as the rotation shaft 11 is above the back bottom 12, the rotation shaft 11 of the back bottom 12 is The position becomes as close as possible to the position of the waist of the bed user, and the feeling of pressure and displacement are reduced. Moreover, since the back bottom 12 is directly driven by the actuator 14 without using a link mechanism, the rigidity of the back bottom 12 is high.

  Next, a second embodiment of the present invention will be described. FIG. 5 is a perspective view of the vicinity of the left rotating shaft 11 of the electric bed according to the second embodiment of the present invention as seen from the inside of the bed. FIG. 6 is a perspective view of the right side of the rotating shaft 11 as seen from the outside of the bed. 7 is a perspective view showing the use state, and FIG. 8 is also a perspective view showing the use state. The present embodiment is different from the first embodiment in that a cover is provided on the rotary shaft 11 and the support portion 10, and the other structure is the same as that of the first embodiment. The support portion 11 (see FIG. 1) of the back bottom 12 is a vertical plate-like member supported by a pair of bars 56 and 57 (see FIG. 5) perpendicular to the frame 2 with respect to the frame 2. The part 11 is covered with a cover 51. The upper surface of the cover 51 has a step between an upper stage and a lower stage, and a rectangular recess 54 is formed on the upper stage. In addition, a pair of holes 55 a and 55 b are provided in the lower stage of the upper surface of the cover 51. Further, a groove 58 into which a bed user's finger enters is formed on the outer surface side of the cover 51. On the other hand, at a position on the leg side of the bed in the cover 51, a cover 52 having a hole 53 opened on the upper surface is provided. The link 12 a connected to the rotation shaft 11 of the support portion 10 is covered with a cover 50.

  The covers 50 and 52 can be formed by, for example, a resin injection mold, and the cover 51 can be manufactured by, for example, blow molding a resin. These covers cover the support portion 10 that is easy for the user to touch and the vicinity thereof, and the support portion 10 that protrudes upward from the frame 2 is provided in order to position the rotating shaft 11 as high as possible. This prevents the appearance from deteriorating and ensures safety.

  And as shown in FIG. 6, it is preferable that the height of the support part 10 and by extension, the height of the upper stage part of the cover 51 do not protrude above the surface of the mattress 60 provided on each bottom. If the upper step of the cover 51 protrudes above the mattress 60, it will be an obstacle when the bed user gets on and off the bed.

  On the other hand, in the cover 51 of the present embodiment, since the groove 58 is formed on the outer surface thereof, when the bed user turns over or gets up, a finger is inserted into the groove 58 to By pulling with force, you will be able to turn over and get up by yourself. Therefore, even in the case of a nursing bed, in the case of a patient whose symptoms are relatively light and easy to stand on, by using the groove 58 of the cover 51 to train himself to turn over or get up by himself / herself, Easier to get out of bed.

  The leg-side end of the cover 52 can also be used as a guide for the bending position of the mattress 60 when the back bottom 12 rises by appropriately setting the position of the cover 52 with respect to the frame 2. It can be used as a guide for the position when the user sleeps.

  And as shown in FIG. 7, the rectangular recessed part 54 of the upper stage part upper surface of the cover 51 can be used in order to lock the hand switch 61 of an electric bed. Further, as shown in FIG. 8, the hole 53 on the upper surface of the upper portion of the cover 51 can be used for inserting the shaft of the grip 62 and rotatably supporting the grip 62. This grip 62 is used by the bed user to hold it and raise his / her body by himself / herself. When the upper body rises on the bed, the grip 62 can be rotated outward. It is possible to prevent the bed user from getting in the way when leaving the bed. Further, the pair of holes 55a and 55b on the upper surface of the lower step portion of the cover 51 can be used for inserting the shaft of the side rail 63 and detachably mounting the side rail 63 on the bed side.

  Next, a third embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that a mounting plate 70 is fixed to each outer side of a pair of bars that support the support plates 13 a to 13 c of the back bottom 12, and is provided on each vertical bar of the frame 2. The pair of support portions 10 and the pair of mounting plates 70 are connected to each other by inverted U-shaped rod-shaped connecting members 71, and in this embodiment, the links 12a and 12b are not used. The end of the connecting member 71 on the support portion 10 side is rotatably connected to the rotating shaft 11 of the support portion 10, and the end of the connecting member 71 on the back bottom 12 side is fixed to the mounting plate 70.

  Also in the present embodiment, the rotation fulcrum of the back bottom 12 is the rotating shaft 11 positioned above the back bottom 12, and, like the first embodiment, the back-up character has a feeling of pressure of the bed user and Deviation can be reduced. Furthermore, in the present embodiment, the back bottom 12 and the rotary shaft 11 are connected by an inverted U-shaped bar-shaped connecting member 71, and therefore the connecting member 71 can be used when the bed user turns over. It can be used as a supporting grip. Moreover, since this connection member 71 protrudes on the mattress of a bed, it can be utilized also as a fence which can prevent a fall of a body. Moreover, since the connecting member 71 moves following the back bottom 12 when the back bottom 12 is raised and lowered, the body can be prevented from falling even when the back bottom 12 is moved.

  Thus, in this embodiment, since the connection part with the rotating shaft 11 for rotating the back bottom 12 also serves as a grip, the number of parts is reduced as compared with the case where a grip is provided later. In addition, the manufacturing process can be reduced, and the manufacturing cost can be reduced.

It is a front view which shows the electric bed which concerns on 1st Embodiment of this invention. It is a figure which shows the rotation fulcrum of the back bottom. It is a figure which shows the operation | movement. It is a perspective view which similarly shows the operation | movement. It is the perspective view which looked at the rotating shaft 11 vicinity of the left side of the electric bed of 2nd Embodiment of this invention from the bed inner side. It is the perspective view which similarly looked at the rotating shaft 11 vicinity of the bed right side from the bed outer side. It is a perspective view which shows the use condition. It is a perspective view which shows a use condition. It is a front view which shows the state which has the back bottom 12 of the electric bed which concerns on 3rd Embodiment of this invention horizontally. It is a front view which shows the standing state of the back bottom 12 similarly. It is a perspective view which similarly shows the standing state of the back bottom 12. FIG.

Explanation of symbols

1: Cart frame 2: Elevating frame 3a: First link 3b: Second link 3c: Rotating shaft 4a: Rotating connecting portion 4b: Slide connecting portion 10: Support portion 11: Rotating shaft 12: Back bottom 12a, 12b: Link 14 , 30, 40: Actuator 14a, 30a, 40a: Piston 50, 51, 52: Cover 58: Groove 71: Connecting member

Claims (7)

A back bottom, a pivot point that is positioned above the back bottom and rotatably supports the back bottom when the back bottom is in a horizontal position, and the back bottom rotates about the pivot point An electric bed comprising a driving device for driving. The electric bed according to claim 1, further comprising a frame and a support portion fixed to the frame and provided with the rotation fulcrum, wherein the support portion protrudes upward from the frame. The drive device includes an actuator in which a base portion is rotatably supported by the frame and a piston tip portion is connected to the back bottom, and the support portion that rotatably supports the base portion of the actuator is the rotation fulcrum. The electric bed according to claim 2, wherein the electric bed is located below the lower side. A knee bottom and a foot bottom rotatably supported by the frame; and another actuator having a base rotatably supported by the frame and a piston tip connected to the knee bottom and / or the foot bottom. The electric bed according to claim 2, wherein the knee bottom and / or the foot bottom is rotationally driven by the other actuator. The electric bed according to any one of claims 1 to 4, wherein an end of the back bottom and the rotation fulcrum are connected by a link. The electric bed according to any one of claims 1 to 4, wherein the back bottom and the rotation fulcrum are connected by a bar-like connecting member serving as a grip. The support part is provided with a cover for covering the support part, and a hole for removably supporting a pivotable grip or a fence is provided on an upper surface of the cover. Item 7. The electric bed according to any one of Items 1 to 6.

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