JP5531783B2 - Bed back lifting device - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention can be used for a bed back raising device having a back raising function for lifting a user's back lying on the bed with respect to the lower body.

  As a bed back raising device, a device that can reduce the feeling of pressure on the user's abdomen by retreating the bottom part near the waist of the bottom supporting the user during the back raising operation (patent) Reference 1). According to this, during back-up operation, a roller provided separately from the back-up arm moves over the cam while moving in conjunction with the back-up arm, pushing up a part of the bottom, near the waist (pelvis) A lumbar support function that raises the pelvis toward the user's ventral side is obtained, and the abdominal pressure can be further reduced by raising the pelvis.

  Furthermore, as a bed back raising device, lowering the buttocks before raising the back, lifting the waist, and then entering the back raising operation allows the back to be raised with the pelvis raised, reducing the feeling of pressure on the abdomen. What can be done is disclosed (Patent Document 2).

JP 2005-237493 A JP 2002-172144 A

  According to the device according to Patent Document 1, the cam is not used when the lumbar support function is not used, that is, when it is not necessary to raise the pelvis particularly by projecting a part of the back bottom toward the user's waist. Therefore, it is necessary to remove the cam, but the cam may be lost because there is no storage space for the cam.

  According to the device according to Patent Document 2, the structure is very complicated in order to lower the buttocks and lift the waist. It has the function of adjusting and releasing the mechanism for lowering the buttocks and lifting the waist, but the structure is complicated and difficult to understand depending on the physical condition.

  The present invention has been made in view of the above circumstances, and provides a bed back raising device with a simplified structure and reduced risk of losing a lumbar support member when the lumbar support function is not used. Let it be an issue.

The bed back raising device according to the present invention includes (i) a base constituting the bed, (ii) a back bottom provided on the base and supporting a user's back lying on the bed, and (iii) at least a waist portion of the back bottom. A bottom frame that supports the bottom portion of the side, and (iv) a back raising mechanism that lifts the back bottom so as to lift the user's back against the user's lower body,
(V) The back raising mechanism pivotally supports a base end portion pivotably on the base and a tip end portion for lifting the back bottom, and rotates the back raising arm in the back raising direction and the back lowering direction. And a back-up driven arm for pivoting in the back-up direction and back-down direction following the back-up arm. And
(Vi) A back-up follower arm includes: (vii) a main body arm whose base end is pivotally supported by the base body and a distal end is pivotally supported by the bottom frame; and (viii) a main body arm A lumbar support position that is attached to the tip side and lumbar support position that pushes the user's waist toward the abdomen while keeping the bottom part of the back bottom of the back bottom away from the bottom frame and attached to the back raising mechanism And a lumbar support member that can be held at a release position for releasing the support position.

  According to the present invention, the back-up follower arm includes a main body arm whose base end portion is pivotally supported by the base body and a distal end portion pivotally supported by the bottom frame, and a distal end portion of the main body arm. And a lumbar support member attached to the side. The lumbar support member is a lumbar support position that raises the pelvis by pressing the user's waist toward the ventral side while keeping the bottom part of the back of the back bottom that supports the user's back away from the bottom frame. It is possible to switch to a release position that releases the lumbar support position while attached to the raising mechanism. At the lumbar support position, the user's waist is slightly warped, the user's posture is restrained from leaning forward, and the feeling of pressure on the user's abdomen on the bed is suppressed. Depending on the physical condition of the user, it may be preferable to release the lumbar support position. In this case, the lumbar support member can be held in the release position with the lumbar support member attached to the back raising mechanism. For this reason, even when the lumbar support function is not exhibited, the risk of the lumbar support member being lost can be eliminated.

  According to the present invention, the lumbar support member is switched between the lumbar support position that pushes the user's waist toward the ventral side while keeping the waist portion of the back bottom away from the bottom frame, and the release position. It is possible. In this case, the lumbar support member can be held in the release position with the lumbar support member attached to the back raising mechanism. For this reason, even when the lumbar support function is not exhibited, the risk of the lumbar support member being lost can be eliminated. Furthermore, according to the present invention, the back-up follower arm is formed by the main body arm and the lumbar support member, and it is only necessary to attach the lumbar support member, thereby simplifying the structure.

It is a side view of the bed apparatus which concerns on Embodiment 1 and is provided with a back raising mechanism. (A) is related with Embodiment 1, It is a side view of the bed apparatus which is operating the back raising mechanism in the back raising direction, switching a lumbar support member to a lumbar support position, (B) is a lumbar support member. It is a side view of the bed apparatus which is operating the back raising mechanism in the back raising direction while switching to the release position. (A) is a side view of the principal part which shows the state which concerns on Embodiment 1 and has fixed the lumbar support member to the lumbar support position, (B) switches a lumbar support member from a lumbar support position to a cancellation | release position. It is a side view of the principal part which shows an intermediate state, (C) is a side view of the principal part which shows the state which hold | maintained the lumbar support member switched to the release position. It is a side view which shows the process which concerns on Embodiment 1 and a back raising arm, a 1st back raising driven arm, and a 2nd back raising driven arm operate | move. It is a side view of the bed apparatus according to the second embodiment and including a back raising mechanism. FIG. 9 is an enlarged side view showing a drive mechanism of an elevating mechanism according to the second embodiment. It is a top view of a bed apparatus concerning Embodiment 2 provided with a back raising mechanism. (A) is related with Embodiment 3, It is a side view of the bed apparatus which is operating the back raising mechanism in the back raising direction, switching a lumbar support member to a lumbar support position, (B) is a lumbar support member. It is a side view of the bed apparatus which is switching to the release position and operating the back raising mechanism in the back raising direction.

  The bed may be a type that can adjust the height position of the frame so that it can be raised or lowered, or a fixed type. Preferably, the lumbar support member is attached to the back raising mechanism in both the lumbar support position and the release position. In this case, even when the lumbar support member is not used, the lumbar support member is attached to the back raising mechanism, eliminating the risk of the lumbar support member being lost when the lumbar support member lumbar support function is not used. it can.

  Preferably, the lumbar support member is provided on one of (i) a support member formed in a U-shape so as to have a first arm and a second arm, and (ii) one of the first arm and the second arm. A contact (e.g., a rotating roller) that can contact at least the waist portion of the back bottom; and (iii) a lumbar support position that contacts the contact to at least the waist portion of the back bottom; And a fixture for attaching the support member to the main body arm or the bottom frame so as to be switchable to a lumbar support release position where the contact is not brought into contact with the bottom portion on the waist side. A bolt can be illustrated as an attachment tool.

  Preferably, the bottom frame has a pin, and the support member has a long hole that relatively moves the pin when adjusting the position of the lumbar support member, and at the lumbar support position, the pin is positioned on one end side in the length direction of the long hole. In the release position, the pin is located on the other end side in the length direction of the long hole. The direction of the lumbar support member can be changed using the long hole. Preferably, the fixture attaches the lumbar support member to the main body arm or the bottom frame at the lumbar support position, and attaches the lumbar support member to the main body arm or the bottom frame at the release position, so that the attachment is attached to the lumbar support position and the release. Shared by both locations. At the release position where the lumbar support member is not used, the lumbar support member is attached to the main body arm or the bottom frame by the fixture, so that the possibility of losing the lumbar support member is eliminated. A bolt is illustrated as an attachment tool.

  Preferably, the base body includes a lower frame and an upper frame positioned above the lower frame along the lower frame. It is preferable that a drive mechanism disposed on one end side in the length direction of the lower frame and the upper frame is provided. It is preferable that a driven mechanism is provided that is disposed on the other end side in the length direction of the lower frame and the upper frame and that is driven by the drive of the drive mechanism. Preferably, the drive mechanism includes (i) a long link whose lower end is pivotally supported by the lower frame and whose upper end is movable along the length direction of the upper frame, and the upper end is upper. A short frame that is pivotally supported at the end in the longitudinal direction of the upper frame from the upper end of the long link and whose lower end is pivotally supported at the intermediate portion in the longitudinal direction of the long link. A y-type link having a link, and (ii) an actuator for raising and lowering the upper frame by changing the crossing angle on the side facing the upper frame while the long link of the y-type link and the short link intersect. I have.

(Embodiment 1)
1 to 4 show Embodiment 1 of the present invention. As shown in FIG. 1, the bed back raising device according to the present embodiment includes a base body 100 constituting the bed, a back bottom 102 provided on an upper frame 101 of the base body 100 and supporting a user's back lying on the bed, A butt bottom 105 that supports the user's butt, a thigh bottom 106 that supports the user's thigh, a crus bottom 107 that supports the user's crus, and a bottom portion 103 on at least the lumbar side of the back bottom 102. A supporting bottom frame 110 and a back raising mechanism 20A for lifting the back bottom 102 so as to lift the user's back against the lower body of the user.

  As shown in FIG. 1, the back raising mechanism 20A rotates the back raising arm 200 for raising the back bottom 102 and the back raising arm 200 in the back raising direction (arrow U1 direction) and the back lowering direction (arrow U2 direction). And a back-up drive source 210 for moving. The base end portion 200e of the back raising arm 200 is pivotally supported by the upper frame 101 of the base body 100 by a pivotal support 200r, and a back raising roller 200f is rotatably provided at the distal end portion. When the back raising roller 200f is raised, the back bottom 102 rolls along the back bottom 102 while supporting the back bottom 102. A drive arm 213 driven by a back raising drive source 210 is connected to the base end portion 200 e of the back raising arm 200.

  As shown in FIG. 1, the back drive source 210 has a main body 211 that is driven by fluid pressure or a motor, and a rod 212 that can be expanded and contracted with respect to the main body 211. The rod 212 is connected to the drive arm 213 via a pivotal support 212r. When the back raising drive source 210 is driven in the forward direction and the rod 212 is extended in the arrow B1 direction, the back raising arm 200 is rotated in the back raising direction (arrow U1 direction) via the drive arm 213. In the back-up state, when the back-up drive source 210 is driven in the reverse direction and the rod 212 contracts in the direction of the arrow B2, the back-up arm 200 rotates in the back-down direction (in the direction of the arrow U2) via the drive arm 213. .

  As shown in FIGS. 2A and 2B, the back raising mechanism 20 </ b> A has a first back raising driven arm 300 and a second back raising driven arm 400 in addition to the back raising arm 200. The second back raising follower arm 400 has a base end portion 400e pivotally supported on the upper frame 101 of the base body 100 via a pivotal support 400r so as to be rotatable in the height direction, and follows the back raising arm 200. Then, it rotates in the back-up direction and the back-down direction. The front end portion 400f of the second back raising driven arm 400 is pivotally supported by the bottom frame 110 via a pivotal support 400m. As shown in FIGS. 2A and 2B, the bottom frame 110 is fixed with a pin 113 serving as a rotation center projecting laterally by welding or a fixture. The first back-up driven arm 300 includes a main body arm 310 and a lumbar support member 350 attached to the front end portion 310f of the main body arm 310. The main body arm 310 has a base end portion 310e pivotally supported by the upper frame 101 via a pivotal support 310r so as to follow the back raising arm 200 and rotate in a back-up direction and a back-down direction. Move. A hole (not shown) formed in the distal end portion 310 f of the main body arm 310 is fitted to the pin 113 so as to be rotatable.

  As shown in FIGS. 2 and 3, the lumbar support member 350 is a support member 353 that is formed in a substantially U-shape (L-shape) so that the first arm 351 and the second arm 352 are connected by a connecting portion. And a rotation roller 360 that is a rolling element that functions as a contact that is provided on the first arm 351 and can contact at least the waist portion 103 of the back bottom 102, and the support member 353 is engaged with the main body arm 310. And an attachment 380 for attaching to the bottom frame 110 in a state of being made. The fixture 380 is a bolt having a male screw. A nut 382 having a female screw (see FIG. 3B) is fixed to the back side of the mounting hole 115 of the bottom frame 110 by welding or a fixture.

  As shown in FIG. 3, the second arm 352 of the support member 353 has a long hole 390 that extends in a straight line for relatively moving the pin 113 when the position of the lumbar support member 350 is adjusted. In FIG. 3A showing the lumbar support position, the lumbar support member 350 is engaged with the female screw of the nut 382 in a state where the fixture 380 is fitted to the other end 390f side of the long hole 390. It is fixed to the bottom frame 110 while being engaged with the main body arm 310. Thus, in the lumbar support position, the pin 113 is located on the one end 390e side in the length direction of the long hole 390.

  That is, FIG. 2A and FIG. 3A show a state where the lumbar support member 350 is switched to the lumbar support position. In the lumbar support position, the back surface 103r of the bottom portion 103 on the waist side of the back bottom 102 is pressed by the roller outer peripheral surface of the rotating roller 360 of the lumbar support member 350, and the arrow A1 direction (use) with respect to the support surface of the bottom frame 110 The bottom portion 103 is lifted away from the support surface 110 s of the bottom frame 110 by moving in the direction toward the person). In such a lumbar support position, the user's waist that presses the user's waist to the ventral side is slightly warped, the user's posture is restrained from leaning forward, and the user's abdomen on the bed is restrained. A feeling of pressure is suppressed.

  By the way, depending on the physical condition of the user, it may be preferable not to use the lumbar support function. In this case, the lumbar support member 350 is switched from the lumbar support position (FIG. 3A) to the release position (FIG. 3C). In this case, as shown in FIG. 3A, in a state where the lumbar support member 350 is set at the lumbar support position, first, the attachment 380 is removed from the attachment hole 115 of the bottom frame 110. Thereafter, as shown in FIG. 3B, the lumbar support member 350 is moved (slid) upward (Y3 direction) along the bottom frame 110, and the pin 113 and the other end 390f of the long hole 390 are applied. In this case, since the pin 113 and the other end 390f of the elongated hole 390 abut, excessive movement (excessive sliding) of the lumbar support member 350 is prevented. Thereafter, the lumbar support member 350 is turned downward about 180 ° along the direction of the arrow A3 about the pin 113 as the rotation center. As a result, as shown in FIG. 3C, the rotating roller 360 that performs the lumbar support function is retracted and stored on the back surface 110r side of the bottom frame 110. With the rotating roller 360 retracted to the back surface 110r side of the bottom frame 110 and stored in this manner, the mounting tool 380 is inserted into the mounting hole 115 of the bottom frame 110, and the female of the nut 382 on the back side of the mounting hole 115 is inserted. Screw onto the screw. As a result, the lumbar support member 350 is fixed to the bottom frame 110 in a state of being fixed at the release position. The rotating roller 360 does not interfere with the operation of the back raising arm 200, the first back raising driven arm 300, and the second back raising driven arm 400.

  As shown in FIG. 3A, at the lumbar support position, one end portion 390e of the long hole 390 is located on the upper side and faces the pin 113, and the other end portion 390f is located on the lower side and attached to the fixture 380. Face to face. As shown in FIG. 3C, in the release position, the positional relationship is opposite to the lumbar support position, and one end 390e of the elongated hole 390 is located on the lower side and faces the fixture 380, and the other end The portion 390f is located on the upper side and faces the pin 113. This is because the lumbar support member 350 is turned about 180 °. In this way, the fixture 380 and the attachment hole 115 can be shared by the lumbar support position and the release position, and each can be made singular, which is advantageous in simplifying the attachment structure.

  Here, FIG. 2B and FIG. 3C show the release position. At the release position, the rotating roller 360 is retracted backward (in a direction away from the user's waist) with respect to the bottom frame 110, so that the roller outer peripheral surface of the rotating roller 360 contacts the back surface 103 r of the bottom portion 103 on the waist side. The bottom portion 103 is moved away from the user's waist by moving in the release direction (arrow A2 direction). In such a release position, as shown in FIG. 3C, the rotating roller 360 is not in contact with the back surface 103r of the bottom portion 103, and the pin 113 is on the other end 390f side in the length direction of the long hole 390. positioned.

  Thus, according to the present embodiment, the direction of the lumbar support member 350 can be changed using the long hole 390. When the lumbar support member 350 is switched from the lumbar support position to the release position, the lumbar support member 350 is attached to the back raising mechanism 20A. For this reason, when the lumbar support function is not used, the risk of losing the lumbar support member 350 can be eliminated. When the lumbar support function is exhibited, the lumbar support member 350 is switched to the lumbar support position. In this state, when the back raising drive source 210 is driven in the forward direction and the rod 212 is extended in the direction of arrow B1 (see FIG. 1), the back raising arm 200 is centered on the pivotal support 200r via the drive arm 213. It rotates in the raising direction (arrow U1 direction). At this time, the first back-up driven arm 300 follows and rotates in the back-up direction (arrow U10 direction) around the pivotal support 310r. The second back-up driven arm 400 follows and rotates in the back-up direction (arrow U20 direction) around the pivotal support 400r.

  According to the present embodiment, as shown in FIG. 3A, when using the lumbar support function, the lumbar support member 350 has a two-point support structure of the pin 113 and the fixture 380, and the load applied by the user. Even when is acting on the rotating roller 360, the lumbar support member 350 is prevented from idling. In particular, since the load application direction (the direction opposite to the arrow A1 direction) and the direction in which the long groove 390 extends are substantially orthogonal, the idling of the lumbar support member 350 is effectively prevented. As shown in FIG. 3C, the lumbar support member 350 is also a two-point support structure of the pin 113 and the fixture 380 even in the release position, and the lumbar support member 350 is prevented from idling. FIGS. 4A to 4I show a turning process of the back raising arm 200, the first back raising driven arm 300, and the second back raising driven arm 400 when the back bottom 102 is raised up. As shown in FIGS. 4A to 4I, the back bottom 102 is gradually raised from an angle of 0 °. For example, the back is raised to an angle of 75 °. The maximum back-up angle is not limited to 75 °, and can be changed as appropriate according to the type of bed.

  According to the present embodiment, the bottom portion 103 on the waist side of the back bottom 102 is the user by the operation of the first back raising follower arm 300 and the second back raising follower arm 400 at the time of raising the back as in the conventional case. Is displaced rearward (in the direction of arrow RA shown in FIG. 4I). This is to suppress the pressure on the user's abdomen.

  As described above, according to the present embodiment, the lumbar support member 350 is switched from the lumbar support position to the release position depending on the physical condition of the user. Thus, when the lumbar support member 350 is switched from the lumbar support position to the release position, the lumbar support member 350 is attached to the back raising mechanism 20A. The possibility of losing 350 can be eliminated.

  According to this embodiment, the attachment 380 attaches the lumbar support member 350 to the main body arm 310 or the bottom frame 110 at the lumbar support position, and attaches the lumbar support member 350 to the main body arm 310 or the bottom frame 110 at the release position. Thus, the fixture 380 is shared in both the lumbar support position and the release position. For this reason, in the release position where the lumbar support function is not used, the risk of the fixture 380 being lost is eliminated.

  Thus, according to the present embodiment, the lumbar support member 350 is attached to the back raising mechanism 20A in both the lumbar support position and the release position. In this case, since the lumbar support member 350 is attached to the back raising mechanism 20A even in the release position where the lumbar support member 350 is not used, the lumbar support member 350 may be lost when the lumbar support member 350 is not used. Can be resolved.

  According to the present embodiment, the bottom 104 is fixed to the bottom frame 110 as can be understood from FIG. When performing the lumbar support function, the bottom portion 103 floats from the bottom frame 110, but the bottom 104 does not float from the bottom frame 110. This is because if the bottom portion 103 and the bottom 104 are integrally formed at the lumbar support position and float from the bottom frame 110, the flying height may become excessive.

(Embodiment 2)
5 to 7 show Embodiment 2 of the present invention. FIG. 7 is a diagram showing an arrangement concept of the planar structure of the bed structure, and is simply a diagram showing an arrangement relationship of a plurality of members, and a plurality of members are drawn overlappingly. Since this embodiment basically has the same configuration and the same operation and effect as those of the first embodiment, FIGS. In the following, different parts will be mainly described. As shown in FIG. 5, the bed apparatus includes a lower frame 1, an upper frame 2 positioned above the lower frame 1 along the lower frame 1, and one end side in the length direction of the lower frame 1 and the upper frame 2. And a driven mechanism 5 that is disposed on the other end side in the longitudinal direction of the lower frame 1 and the upper frame 2 and that is driven by the drive mechanism 3 to move up and down. The lower frame 1 and the upper frame 2 are arranged parallel to each other. The length direction of the bed apparatus is shown as the L direction. The width direction of the bed apparatus is shown as the W direction (see FIG. 7).

  FIG. 7 shows a plan view of the bed apparatus. As shown in FIG. 7, the lower frame 1 is connected to a single long lower column 10 extending in the arrow L direction and arranged at the center in the arrow W direction, and one end portion 10 e in the length direction of the long lower column 10. A first end lower column 11 extending in the W direction, and a second end lower column 12 connected to the other end portion 10f in the length direction of the long lower column 10 and extending in the arrow W direction. Thus, the lower frame 1 has an H shape in a plan view, and is compact, so that the cleaning work in the vicinity of the lower frame 1 becomes easy.

  As shown in FIG. 7, the upper frame 2 includes two long upper struts 20R, L extending in the direction of the arrow L and the central portions of the long upper struts 20R, 20L in the length direction (arrow L direction). Are connected to each other and extend in the direction of arrow W, and upper end support columns 20R and 20L are connected to each other in the lengthwise direction, and the first upper end support column 22 extends in the direction of arrow W. The second end upper column 23 is connected to the other ends of the column 20 in the length direction and extends in the arrow W direction. One end 2e of the upper frame 2 is on the user's foot side. The other end 2f of the upper frame 2 is the user's head side. The head and feet may be reversed. The upper frame 2 is provided with a bottom 24 on which a user is placed.

  As shown in FIG. 6, the drive mechanism 3 includes a y-type link 30 having a long link 31 and a short link 32, and an actuator 33 that functions as an elevating drive source for raising and laying the y-type link 30. And have. A lower end portion of the long link 31 is pivotally supported by the lower frame 1 via a pin-shaped pivot support 31f. The upper end of the long link 31 is connected to a slider 34 via a pivotal support 31e, and the slider 34 extends along the length direction (arrow L direction) of the long upper struts 20R and 20L of the upper frame 2. It can be moved in the directions of arrows A1 and A2. The short link 32 has a central axis Pk. As shown in FIG. 6, the upper end portion of the short link 32 is pivotally supported on the one end portion 2 e side in the length direction of the upper frame 2 so as to be rotatable by a pivot support 32 e. As shown in FIG. 6, the pivot support 32e at the upper end of the short link 32 is positioned closer to the one end 2e than the position of the upper end (the pivot support 31e and the slider 34) of the long link 31 in the upper frame 2. To do. This is because the y shape of the y-type link 30 is formed. The lower end portion of the short link 32 is pivotally supported by the pivotal support 32f at the intermediate portion in the length direction of the long link 31. In the width direction of the bed, a total of two sets of y-type links 30 are provided on the long upper support columns 20R and 20L. The two sets of y-type links 30 are synchronized with each other by a first interlocking shaft 35 formed by a pipe or a shaft connecting them. The first interlocking shaft 35 has a central axis Pc and extends in the direction of arrow W indicating the width of the bed apparatus.

  As shown in FIGS. 5 and 6, the crossing angle on the side where the long link 31 and the short link 32 of the y-type link 30 cross and face the upper frame 2 is shown as θ. The actuator 33 is disposed between the y-type link 30 and the driven link mechanism 50 in the length direction of the upper frame 2 (the direction of the arrow L). The actuator 33 raises and lowers the upper frame 2 in the directions of arrows H1 and H2 by changing the intersection angle θ. The actuator 33 can be driven by a flow pressure such as air pressure or hydraulic pressure, or by a motor, and is pivotally supported by the upper frame 2 by a pin-shaped pivot support 35e at an intermediate portion in the length direction. It has a main body 35 and a telescopic rod 36 that can expand and contract with respect to the main body 35 in the directions of arrows B1 and B2 (see FIG. 6, diagonally downward and diagonally upward). The actuator 33 has a control unit 35c having a communication unit 35x connected to an operation switch (not shown).

  Further, as shown in FIGS. 5 and 6, a push-up member 37 is provided. The push-up member 37 drives the y-type link 30, and the actuator 33 drives the intersection angle θ (the intersection angle facing the upper frame 2) at which the long link 31 and the short link 32 of the y-type link 30 intersect. To change. The push-up member 37 is provided between the short link 32 and the telescopic rod 36 of the actuator 33. As shown in FIGS. 5 and 6, the push-up member 37 includes a first push-up link 38 and a second push-up link 39 that are connected to each other at a certain angle. The angle formed by the first push-up link 38 and the second push-up link 39 is appropriately set according to the size of the actuator 33 and the like. The first push-up link 38 and the second push-up link 39 are integrally fixed to the first interlocking shaft 35 by welding or bolts, and are integrally interlocked with the first interlocking shaft 35. It rotates around the central axis Pc.

  As shown in FIG. 6, a slider 40 (for example, a rolling roller or a rolling ball) is provided at one end of the first push-up link 38. The slider 40 is provided in the short link 32 so as to be movable in the directions of arrows D1 and D2 along the length direction thereof. Thereby, the direction of the short link 32 with respect to the floor surface FA is changed. As described above, the other end of the first push-up link 38 is fixed to the first interlocking shaft 35 by welding, bolts, or the like, and interlocks with the first interlocking shaft 35. The upper end portion of the second push-up link 39 is fixed to the first interlocking shaft 35 by welding, bolts or the like so as to be interlocked with the first push-up link 38. As shown in FIG. 6, the lower end portion of the second push-up link 39 is pivotally supported by the distal end portion of the telescopic rod 36 of the actuator 33 via a pivotal support 39f.

  Here, when the actuator 33 is operated and the telescopic rod 36 of the actuator 33 extends obliquely downward, that is, in the direction of the arrow B1 (see FIG. 6, the direction in which the upper frame 2 is raised), the lower end of the second push-up link 39 is pivotally supported. The tool 39f moves with the second push-up link 39 around the first interlocking shaft 35 in the direction of arrow E1 (the direction in which the upper frame 2 is raised). For this reason, the first push-up link 38 connected to the second push-up link 39 via the first interlocking shaft 35 is centered on the first interlocking shaft 35 (the direction of the arrow F1 and the direction in which the upper frame 2 is raised). It turns in the direction to turn and stand up. At this time, the slider 40 of the first push-up link 38 moves downward along the length direction of the short link 32 toward the pivotal support tool 32f (intermediate portion of the long link 31) along the arrow D1 direction. As a result, the short link 32 rotates in the direction (arrow F1 direction) that stands up with respect to the floor surface FA. Similarly, the long link 31 rotates in a direction (in the direction of the arrow R1) that rises with respect to the floor surface FA, and the crossing angle θ becomes relatively small. As a result, the height H of the upper end of the y-type link 30 (that is, the pivotal support 31e of the long link 31 and the pivotal support 32e of the short link 32) is increased, and the upper frame 2 is perpendicular to the direction of the arrow H1. Ascend in the direction.

  In contrast, when the actuator 33 operates in the opposite direction and the telescopic rod 36 of the actuator 33 contracts in the direction of arrow B2, that is, obliquely downward, the pivotal support 39f at the lower end of the second push-up link 39 rotates in the direction of arrow E2. Move. For this reason, the second push-up link 39 rotates in the direction of the arrow E2 around the first interlocking shaft 35 and is displaced in the direction to lie down with respect to the floor surface FA. In conjunction with the second push-up link 39, the first push-up link 38 also rotates about the first linkage shaft 35 in the direction of the arrow F2. At this time, the slider 40 of the first push-up link 38 moves along the short link 32 in the direction of the arrow D2 (direction away from the middle portion of the long link 31). Similarly, the long link 31 rotates in the direction to sleep with respect to the floor surface FA. As a result, the intersection angle θ becomes relatively large. As a result, the height of the upper end portion of the long link 31 and the upper end portion of the short link 32 of the y-type link 30 is lowered. Therefore, the upper frame 2 is lowered while basically moving in the direction of the arrow H2, and the height H of the upper frame 2 is lowered. As described above, with the expansion and contraction of the telescopic rod 36 of the actuator 33, the first push-up link 38 and the second push-up link 39 constituting the push-up member 37 deform the y-link 30 by relatively changing the crossing angle θ. The height H of the upper frame 2 with respect to the floor surface FA can be raised or lowered by increasing or decreasing the heights of the upper end portion of the long link 31 and the upper end portion of the short link 32 of the y-type link 30.

  The driven mechanism 5 will be described. The driven mechanism 5 stabilizes the lifting operation of the upper frame 2 and has a driven link mechanism 50. As shown in FIG. 5, the driven link mechanism 50 is rotated around the driven first link 51 and the driven first link 51 that are substantially parallel to the direction of the long link 31 of the y-type link 30. It has a driven second link 52 that is pivotally supported and is oriented substantially parallel to the direction of the short link 32 of the y-type link 30. The driven first link 51 has a central axis Pr. The driven second link 52 has a central axis Ps. The driven first link 51 and the driven second link 52 have a “<” shape so that the pivotal support 51 e, which is the connection point between them, is positioned outward in the arrow L direction (a direction away from the actuator 33). ing. The length of the driven first link 51 is about half of the length of the long link 31. The length of the driven second link 52 is substantially the same as that of the short link 32. Here, the lower end portion of the driven first link 51 is pivotally supported by the lower frame 1 via the other end portion 51f. The upper end portion of the driven first link 51 is pivotally supported by the lower end portion of the driven second link 52 via a pivotal support 51e. The upper end portion of the driven second link 52 is pivotally supported on the long upper columns 20R and 20L of the upper frame 2 via a pivot support 52e. As shown in FIG. 6, the shape formed by the lower half of the long link 31 and the short link 32 is such that the pivotal support 32f, which is the connection point between them, is inward in the direction of arrow L (in the direction approaching the actuator 33). As a result, the shape is substantially the same as the shape of the “<” formed by the driven first link 51 and the driven second link 52.

  Here, as can be understood from FIG. 5, the long link 31 and the driven first link 51 are basically tilted in the same direction in parallel, and the first interlocking is performed from the pivotal support 31 f which is the lower end of the long link 31. The distance to the shaft 35 and the distance from the pivotal support 51f, which is the lower end of the driven first link 51, to the second interlocking shaft 54 are basically the same. This ensures good followability.

  Here, when the y-type link 30 of the drive mechanism 3 is driven by the actuator 33, the operation of the y-type link 30 is transmitted to the driven first link 51 of the driven mechanism 5 via the connecting member 53, and the driven first link 51. Synchronize and follow. At this time, as understood from FIG. 5, the rotation angle (direction) of the long link 31 of the y-type link 30 with respect to the floor surface FA is the rotation angle of the driven link with respect to the floor surface FA of the driven first link 51. (Direction) is preferably the same. Accordingly, the first driven link 51 of the driven link mechanism 50 preferably has a high degree of parallelism with respect to the long link 31 of the y-type link 30. Further, the rotation angle (direction) of the short link 32 of the y-type link 30 with respect to the floor surface FA is the same as the rotation angle (direction) of the driven second link 52 of the driven link mechanism 50 with respect to the floor surface FA. It is preferable. Therefore, it is preferable that the driven second link 52 has a high degree of parallelism with the short link 32 of the y-type link 30.

  As described above, according to the present embodiment, the upper frame 2 can be moved up and down while being translated in the directions of the arrows H1 and H2 by driving the actuator 33. That is, if the telescopic rod 36 of the actuator 33 is extended while the user's body is placed on the upper frame 2, the upper frame 2 can be raised in the vertical direction along the arrow H1 direction. Similarly, if the telescopic rod 36 of the actuator 33 contracts while the user's body or object is placed on the mounting portion 24 of the upper frame 2, the upper frame 2 is moved vertically along the arrow H2 direction. Can be lowered. At this time, when the upper frame 2 moves up and down between the bottom dead center and the top dead center, the one end 2e and the other end 2f in the length direction of the upper frame 2 are suppressed from being excessively displaced in the arrow L direction. The

  According to this embodiment, as shown in FIGS. 5 and 6, a space 42 is formed between the y-type link 30 of the drive mechanism 3 and the driven link mechanism 50 of the driven mechanism 5. For this reason, the downward cleaning work in the upper frame 2 becomes easy. Furthermore, according to the present embodiment, in the drive mechanism 3, the y-type link 30 having the long link 31 and the short link 32 is used instead of the x-type link that intersects the long links 31 having the same length with each other in the X-shape. Is provided. The length of the short link 32 is set shorter than the length of the long link 31. Therefore, as shown in FIG. 6, a space 43 is formed below the upper frame 2 on the extended line PA side toward the lower frame 1 among the short links 32 of the y-type link 30. For this reason, the cleaning work under the upper frame 2 becomes easy. Further, as shown in FIG. 5, the driven link mechanism 50 has a “<” shape, so that a space 45 is formed as compared with the case where the driven link mechanism 50 is an X-shaped X link. Thus, the cleaning work on the driven mechanism 5 side in the lower part of the upper frame 2 is facilitated. As shown in FIG. 6, a pivotal support 35 e (portion for pivotally supporting the actuator 33 on the upper frame 2) of the main body 35 of the actuator 33 and a pivotal support at the upper end of the long link 31 of the y-type link 30. A distance ΔL is provided between 31e (the portion that pivotally supports the long link 31 on the upper frame 2).

(Embodiment 3)
8A and 8B show Embodiment 3 of the present invention. This embodiment basically has the same configuration and the same function and effect as the first and second embodiments. As shown in FIGS. 8A and 8B, the bottom frame 110 is fixed with a pin 113 serving as a rotation center projecting laterally by welding or the like. The first back-up driven arm 300 is formed by a main body arm 310 and a lumbar support member 350 attached to the front end portion 310f of the main body arm 310. The base end portion 310e of the main body arm 310 is pivotally supported by the upper frame 101 of the base body 100 via a pivotal support 310r. A hole (not shown) formed in the distal end portion 310 f of the main body arm 310 is fitted to the pin 113 so as to be rotatable.

  As shown in FIG. 8A, the lumbar support member 350 includes at least a waist portion of a support member 353 formed in a substantially U shape (L shape) and a back bottom 102 provided on the first arm 351. A rotating roller 360 that is a rolling element that functions as a contact that can come into contact with the bottom portion 103 on the side, and a fixture 380 for attaching the support member 353 to the bottom frame 110 in a state where the support member 353 is engaged with the main body arm 310. . The fixture 380 is a bolt having a male screw. A first nut 382f having a female screw is fixed to the back side of the first mounting hole 115f of the bottom frame 110 by welding or a fixture. A second nut 382s having a female screw is fixed to the back side of the second mounting hole 115s of the bottom frame 110 by welding or the like. 115 f of 1st attachment holes and 115 s of 2nd attachment holes are formed as a position which pin | pins 113 are pinched | interposed.

  As shown in FIG. 8A, at the lumbar support position, the lumbar support member 350 is engaged with the female screw of the first nut 382f in a state in which the fixture 380 is fitted in the first mounting hole 115f. Is fixed to the bottom frame 110 while being engaged with the main body arm 310. That is, as shown in FIG. 8A, at the lumbar support position, the back surface 103r of the bottom portion 103 on the waist side of the back bottom 102 is pressed by the roller outer peripheral surface of the rotating roller 360 of the lumbar support member 350, and the bottom frame 110 is protruded in the direction of arrow A1 (the direction toward the user) and floated. This keeps the bottom portion 103 away from the bottom frame 110.

  Depending on the physical condition of the user, it may be preferable to cancel the lumbar support function. In this case, the lumbar support member 350 is switched to the release position (FIG. 8B). In this case, as shown in FIG. 8B, in a state where the lumbar support member 350 is set at the lumbar support position, first, the attachment tool 380 is removed from the first attachment hole 115 of the bottom frame 110. Thereafter, the lumbar support member 350 is turned about 180 ° downward along the direction of the arrow A3 with the pin 113 as the rotation center. As a result, as shown in FIG. 8B, the rotating roller 360 is retracted and stored behind the back surface 110r of the bottom frame 110 (in a direction away from the user's waist). With the rotating roller 360 retracted in this way, the fixture 380 is inserted into the second mounting hole 115s of the bottom frame 110 and screwed into the female screw of the second nut 382s. Accordingly, the lumbar support member 350 is fixed to the bottom frame 110 in a state where the lumbar support member 350 is set to the release position. In such a release position, the rotating roller 360 is retracted backward (in a direction away from the user's waist) with respect to the bottom frame 110, so that the outer periphery of the roller of the rotating roller 360 is placed on the back surface 103 r of the bottom portion 103 on the waist. The faces are not touching. Therefore, the bottom frame 110 is moved away from the user's waist by moving in the release direction (arrow A2 direction). In such a release position, the rotating roller 360 is not in contact with the back surface 103r of the bottom portion 103 as shown in FIG. Thus, according to the present embodiment, the lumbar support member 350 is rotated about the pin 113 as the rotation center. Thus, when the lumbar support member 350 is switched to the release position, that is, when the lumbar support function of the lumbar support member 350 is not used, the lumbar support member 350 is fixed to the bottom frame 110 of the back raising mechanism 20A. Therefore, the risk of losing the lumbar support member 350 can be eliminated.

(Other)
When switching from the lumbar support position to the release position, the turning angle of the lumbar support member 350 is about 180 °, but is not limited to this, and the structure is about 90 °, about 120 °, and about 270 °. It is also good. As the contact that presses the bottom portion 103, the rotating roller 360 is rotatably used. However, the present invention is not limited to this, and a sliding body that slides while contacting the bottom portion 103 may be used. The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope not departing from the gist.

  100 is a base, 101 is an upper frame, 102 is a back bottom, 103 and a bottom part, 110 is a bottom frame, 113 is a pin, 115 is a mounting hole, 20A is a back raising mechanism, 200 is a back raising arm, 210 is a back raising drive Source, 211, main body, 212, rod, 213, driving arm, 300, first back-up driven arm, 310, main body arm, 350, lumbar support member, 351, first arm, 352, second arm, 353, support A member 360, a rotating roller (follower), 380 a fixture, 390 a long hole, and 400 a second back-up driven arm.

  Further, 1 is a lower frame, 2 is an upper frame, 3 is a drive mechanism, 30 is a y-type link, 31 is a long link, 32 is a short link, 33 is an actuator, 34 is a slider, 35 is a first interlocking shaft, and 36 is The telescopic rod, 38 is a first push-up link, and 39 is a second push-up link.

Claims (6)

A base that constitutes a bed, a back bottom that is provided on the base and supports a user's back lying on the bed, a bottom frame that supports at least a bottom portion of the back bottom of the back bottom, and a user's back A back raising mechanism for lifting the back bottom so as to lift up against the lower body of the body,
The back raising mechanism includes a back raising arm for pivotally supporting a base end portion to the base and a tip portion for raising the back bottom, and turning the back raising arm in a back raising direction and a back lowering direction. And a back-up driven arm for pivoting in the back-up direction and the back-down direction following the back-up arm, the base end of which is pivotally supported by the base. Have
The back-up follower arm is
A main body arm having a base end pivotally supported by the base and a tip end pivotally supported by the bottom frame;
A lumbar support position that is attached to the front end portion of the main body arm and pushes the user's waist toward the ventral side while keeping the bottom portion of the back bottom of the back bottom away from the bottom frame, and the back A bed back raising device having a lumbar support member that can be held in a release position for releasing the lumbar support position in a state of being attached to a raising mechanism.   The bed back raising device according to claim 1, wherein the lumbar support member is attached to the back raising mechanism at both the lumbar support position and the release position. The lumbar support member according to claim 1 or 2,
A support member molded in a U-shape so as to have a first arm and a second arm;
A contact provided on one of the first arm and the second arm and capable of contacting at least the waist portion of the back bottom of the back bottom;
The support member is switchable between the lumbar support position in which the contact is brought into contact with at least the bottom part on the waist side of the back bottom and the release position in which the contact is not brought into contact with the bottom part on the waist side. A bed back raising device having a fixture for attaching to the main body arm or the bottom frame. In one of Claims 1-3, the bottom frame has a pin, and the support member has a long hole that relatively moves the pin when adjusting the position of the lumbar support member,
In the lumbar support position, the pin is located on one end side in the length direction of the long hole, and in the release position, the pin is located on the other end side in the length direction of the long hole. Lifting device.   5. The attachment device according to claim 3, wherein the fixture attaches the lumbar support member to the main body arm and / or the bottom frame at the lumbar support position, and the lumbar support member at both the lumbar support position and the release position. The mounting device is a bed back raising device shared by both the lumbar support position and / or the release position so as to be attached to the main body arm or the bottom frame. In one of Claims 1-5, the base is provided with a lower frame, and an upper frame located above the lower frame along the lower frame,
A drive mechanism arranged on one end side in the length direction of the lower frame and the upper frame, and an elevating drive of the drive mechanism arranged on the other end side in the length direction of the lower frame and the upper frame And a driven mechanism
The drive mechanism includes: (i) a long link whose lower end is pivotally supported by the lower frame and whose upper end is movable along the length direction of the upper frame; Of the upper frame, the upper link is pivotally supported at the end in the longitudinal direction of the upper frame relative to the upper end of the long link, and the lower end is pivoted at an intermediate portion in the longitudinal direction of the long link. A y-type link having a supported short link; and (ii) the upper frame by changing the crossing angle of the side opposite to the upper frame while the long link and the short link of the y-type link intersect. A bed back raising device comprising an actuator for moving up and down.

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