JP2020141792A - Bed apparatus - Google Patents

Abstract

To provide a bed apparatus capable of including a head-up function in a simple configuration.SOLUTION: A bed apparatus comprises: a back floor part 17 whose one end is rotationally provided at a bed frame and that includes a guide rail 35 at a lower side thereof, along a longitudinal direction crossing the width direction; a head-up part 43 whose middle part is rotationally provided at the other end of the back floor part; a back drive shaft 26 disposed at the bed frame, with an axial line laid along the width direction of the bed frame, with a different position from the one end of the back floor part used as a center; a back drive part 24 for driving the back drive shaft; a back-raising arm 33 that has a back-raising roller 34 to be engaged with the guide rail, whose one end is attached to the back drive shaft, and that, when the back drive part is actuated, is rotatingly driven along with the back drive shaft to interlock the back floor part via the back-raising roller; and an actuation member 38 that is provided at the other end of the back-raising arm, and that, when one end of the head-up part comes into contact therewith, inclines the other end of the head-up part so as to project to the upper face side of the back floor part.SELECTED DRAWING: Figure 3

Description

The present invention relates to a back-raising bed device capable of maintaining a posture in which a user raises his / her head.

In the back-raising type bed device, the floor plate body provided on the bed frame is divided into a plurality of parts such as a back floor portion, a waist floor portion, and a leg floor portion, and these are rotatably connected to each other. The back floor is designed to correspond to the upper body of the user. The backfloor portion can be driven up and down by a back raising mechanism, and by driving in the raised direction, the user can easily take a posture in which the upper body is raised.

In the above-mentioned back-raising bed device, when the user raises the upper body by raising the back floor, the head is tilted forward by a predetermined angle from the state where the head is leaning against the back floor. It may be preferable to hold it in a tilted state.

For example, when reading a book or watching TV, it may be easier for the head to be tilted forward than the backfloor, and when eating, it becomes easier to swallow the food in the mouth. Therefore, dysphagia may not occur easily.

Therefore, conventionally, a bed device having the configuration shown in Patent Document 1 is known. That is, in the conventional bed device, the bed frame is provided with a rod that is rotationally driven in the vertical direction by a motor. A back support frame (back floor) is rotatably provided on the bed frame with one end as a fulcrum.

A head support frame (head-up portion) is pivotally attached to the tip of the back support frame so as to be undulating. The tip of the rod is connected to the head support frame via a support arm.

When the rod is driven by the motor, the head support frame is undulated and driven via the support arm. Then, the back support frame is undulated in conjunction with the undulating operation of the head support frame.

Then, when the rod is undulated and driven by the motor, the drive is transmitted to the back support frame via a link mechanism composed of a link member, an intermediate link piece, a base end link piece, and the like. The back support frame is undulatingly driven.

JP-A-2009-247628

According to the bed device having the above-described configuration, it is true that the head support frame is provided on the back support frame in an undulating manner, and the head support frame can be undulated together with the back support frame. There is.

However, when the rod is driven by the motor and the head support frame is driven by the support arm connected to the rod, the back support frame is the link member, the intermediate link piece, and the base end. It is driven via a link mechanism composed of a link piece or the like.

That is, in order to drive the head support frame and the back support frame, in addition to the rod driven by the motor, the link member, the intermediate link piece, the base end link piece, and the like are configured. It is configured to require a link mechanism.

Therefore, such a bed device may lead to an increase in the number of parts and a complicated configuration due to an increase in the number of parts.

The present invention is to provide a bed device capable of driving a head-up portion together with the backfloor portion without using a complicated link mechanism.

The present invention is a bed frame and
A backfloor portion having one end rotatably provided on the bed frame and a guide portion provided along a longitudinal direction intersecting the width direction on the lower surface side.
A head-up portion having a rotatably provided midway portion at the other end of the backfloor portion,
A drive shaft arranged on the bed frame with an axis line along the width direction of the bed frame with a position different from one end of the back floor portion as the center of rotation.
The drive means for driving the drive shaft and
Having an engaging member that engages with the guide portion, one end thereof is attached to the driving shaft, and the driving means is operated to rotate and drive the drive shaft together with the driving shaft, so that the back is driven through the engaging member. A back-raising arm that links the floor and
It is provided with an operating member provided at the other end of the back raising arm so that one end of the head-up portion abuts and the other end of the head-up portion is inclined so as to project toward the upper surface side of the back floor portion. It is in the bed device which is characterized by that.

According to the present invention, if the back raising arm is driven in the raising direction, the back floor portion can be raised in conjunction with the operation, and at the same time, the head is raised by the operating member provided on the back raising arm. The part can be tilted.

Therefore, the back floor portion and the head-up portion can be operated by undulating the back-raising arm, so that the back-raising arm and the head-up portion can be driven with a simple configuration. It becomes possible.

A side view showing a state in which the back floor portion and the first and second leg floor portions of the bed device according to the embodiment of the present invention are driven. Top view of the bed device. The figure which shows the movement of the back raising arm with respect to the guide rail provided on the back surface of the back floor part when the back floor part fell down horizontally and when it was raised at a predetermined angle. (A) is a plan view of a state in which a pair of back-raising arms having back-raising rollers are assembled, and (b) is a side view of the same. (A) is a plan view of the upper end portion provided with the head-up portion of the back floor portion, and (b) is a side sectional view of FIG. 5 (a). FIG. 6A is a plan view of the head-up portion showing a state in which the pair of transmission members are held at the operating position, and FIG. 6B is a side view of the same. FIG. 7A is a plan view of the head-up portion showing a state in which the pair of transmission members are held in the non-operating position, and FIG. 7B is a side view of the same. An enlarged view of a portion provided with an urging means for elastically urging and holding the head-up portion in the lodging direction.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view of the bed device, and FIG. 2 is a partially broken plan view. The bed device includes a bed frame 1. As shown in FIG. 2, the bed frame 1 is provided with a pair of vertical rods 2 arranged in parallel at predetermined intervals, and both ends connected to one end and the other end of the vertical rods 2 in the longitudinal direction. It is formed in a rectangular frame shape by a pair of horizontal rods 3.

Leg members 4 are provided on the lower surfaces of the four corners of the bed frame 1. Thereby, the bed frame 1 is supported at a predetermined height. A pair of fixed rod members 6 separated from the vertical rod 2 at predetermined intervals are provided on the outer surfaces of both sides of the bed frame 1 in the middle portion in the longitudinal direction.

A pair of movable rod members 8 having one end of a link 7 pivotally attached to both ends in the longitudinal direction are arranged on both sides of the fixed rod member 6 in the longitudinal direction. The other end of the link 7 is pivotally attached to the vertical rod 2. As a result, each movable rod member 8 is movable in a direction in which the bed frame 1 is brought into contact with and separated from the vertical rod 2.

When the movable rod member 8 is moved in a direction approaching the vertical rod 2, each pair of the movable rod members 8 are aligned with the fixed rod member 6.

A pair of mounting holes 9 opened on the upper surface are bored at both ends of the upper surface of the movable rod member 8 in the longitudinal direction. Legs provided on side fences (not shown) are detachably inserted and supported in each pair of mounting holes 9. That is, the side fence can be detachably attached to the movable rod member 8.

The bed frame 1 is provided with a floor plate body 11. The floor plate body 11 is divided into a plurality of floor portions, is arranged in the middle portion in the longitudinal direction of the bed frame 1 along the width direction, and has a fixed floor portion 12 fixed to the bed frame 1.

The first leg floor portion 13 and the second leg are on one side of the fixed floor portion 12 in a direction intersecting the width direction of the bed frame 1 (this direction is the longitudinal direction of the floor plate body 11). The floor portion 14 is sequentially rotatably connected to the floor portion 14. The waist floor portion 16 and the back floor portion 17 are sequentially rotatably connected to the other side of the fixed floor portion 12 in the longitudinal direction.

As shown by the chain line in FIG. 1, the mattress M is placed on the upper surface of the floor plate body 11 on the upper surface of the floor plate body 11 in a state where the mattress M does not slip off from the upper surface. When the back floor portion 17 is driven in the raised direction as described later, the mattress M is easily bent according to the raised shape (back raising), and the hardness of the floor plate body 11 is not transmitted. It is made of a relatively hard elastic material.

As shown in FIGS. 1 and 2, a driving device 21 for undulating and driving the floor plate 11 is arranged on the lower surface side of the floor plate 11 and in the middle of the bed frame 1 in the longitudinal direction. The drive device 21 has a control unit 22. A leg drive unit 23 made of a linear motor is provided at one end of the control unit 22, and a back drive unit 24 as a drive means also made of a linear motor is provided at the other end.

As shown in FIG. 2, a leg drive shaft 25 is arranged on the lower surface side of the first leg floor portion 13 with an axis line along the width direction of the bed frame 1, and the lower surface side of the waist floor portion 16. A back drive shaft 26 as a drive shaft is arranged in parallel with the leg drive shaft 25.

On the lower surface side of the floor plate body 11, a pair of strip-shaped mounting members 27 separated from each other at predetermined intervals in the width direction are fixed to the bed frame 1 in the middle of the bed frame 1 in the longitudinal direction. It is provided. The one end and the other end of the leg drive shaft 25 and the back drive shaft 26 in the axial direction are rotatably supported by one end and the other end of the pair of mounting members 27, respectively.

The middle part of the leg drive shaft 25 is inserted through the leg drive part 23, and the middle part of the back drive shaft 26 is inserted through the back drive part 24. As shown in FIG. 1, the base ends of the L-shaped drive levers 28 are attached to the portions of the drive shafts 25 and 26 inserted into the drive units 23 and 24, respectively.

Then, when the leg drive unit 23 and the back drive unit 24 made of a linear motor are activated, the tip portions of the drive lever 28, which are free ends, are linearly driven by the drive units 23 and 24. It is pressed by the members 23a and 24a. As a result, the leg drive shaft 25 and the back drive shaft 26 are rotationally driven in a predetermined direction.

As shown in FIGS. 1 and 2, one end of the leg raising arm 29 is fixed to both ends of the leg drive shaft 25, respectively. A roller 30 is provided at the other end of the leg raising arm 29.

When the leg drive shaft 25 is driven by the leg drive unit 23 and the other end of the leg raising arm 29 is rotated in the ascending direction, the roller 30 moves on the lower surface of the first leg floor portion 13. The leg guide rails 31 provided at both ends in the width direction along the direction intersecting the width direction are rolled while being pressed in the ascending direction.

As a result, as shown in FIG. 1, the first leg floor portion 13 rotates in the direction in which the other end rises with one end as a fulcrum according to the rising angle of the leg raising arm 29.

When the first leg floor portion 13 rotates in the ascending direction, one end side of the second leg floor portion 14 whose one end is connected to the first leg floor portion 13 rises in conjunction with the first leg floor portion 13. As shown in FIG. 2, one end of the holding link 32 is pivotally attached to the other end of the second leg bed portion 14. The other end of the holding link 32 is pivotally attached to the inner surface of the vertical rod 2 of the bed frame 1.

As a result, the second leg floor portion 14 whose one end is raised in conjunction with the rotation of the first leg floor portion 13 is supported by the holding link 32 at the other end, as shown in FIG. As shown, it is held in a raised state in a shape of a shape with the first leg floor portion 13.

As shown in FIGS. 1 to 3, one end (base end portion) of the back raising arm 33 is fixed to both ends of the back drive shaft 26, respectively. A pair of back raising rollers 34 as engaging members are rotatably provided at the other end (tip portion) of the back raising arm 33 located on the lower surface side of the back floor portion 17.

As shown in FIG. 4A, a reinforcing bar 36 for reinforcing the attachment strength of the pair of the back raising arms 33 to the back drive shaft 26 is provided between the middle portions of the pair of the back raising arms 33. It is erected.

As shown in FIGS. 1 to 3, a pair of back-raising rollers 34 are rotatably engaged with each other at both ends of the back floor portion 17 on the lower surface side in the width direction. The pair of guide rails 35 are attached along the longitudinal direction intersecting the width direction, that is, the vertical direction when the backfloor portion 17 is driven and rises.

As a result, when the free end of the drive lever 28 is pressed in a linear direction by the movable member 24a of the back drive unit 24 and is rotationally driven, the back drive shaft 26 is interlocked with the rotation.

That is, the back drive shaft 26 is rotationally driven in the clockwise direction indicated by the arrow X in FIG. As a result, the back raising arm 33 rotates in a direction in which the tip end side rises around the back drive shaft 26 in conjunction with the rotation of the drive lever 28.

When the back raising arm 33 rotates in the ascending direction, the back floor portion 17 is connected to the fixed floor portion 12 together with the waist floor portion 16 by the back raising roller 34 engaged with the guide rail 35. As a fulcrum, it rises in the rising direction. At this time, as shown in FIG. 3, the back floor portion 17 bends with respect to the waist floor portion 16.

One end of the waist floor portion 16 that rotates the rotation center of the back raising arm 33, that is, the rotation center point of the back drive shaft 26 together with A and the back floor portion 17, connected to the fixed floor portion 12. Assuming that the rotation center point is B, the point A and the point B are set at different positions with respect to the front-rear direction and the vertical direction of the bed frame 1.

Specifically, based on the point A at the center of rotation of the back raising arm 33 that is rotationally driven, the point B is behind the floor plate 11 in the horizontal direction from the point A. It is located on the fixed floor 12 side and is located above in the vertical direction.

As a result, when the back floor portion 17 is driven in the ascending direction by the back drive shaft 26 that rotates the back raising arm 33 in the direction indicated by the arrow X, the back raising arm 33 is attached to the back floor portion 17. It moves downward with respect to the provided guide rail 35 as shown by an arrow D in FIG.

That is, by rotating the back-raising arm 33 and the back-floor portion 17 at different positions of the points A and B, the back-raising arm 33 causes the back-floor portion 17 to be shown in FIG. When the back raising arm 33 is driven in the rising direction as shown in P2 and P3 from the state of being prone to the estimation shown in P1, the back raising arm 33 with respect to the guide rail 35 provided on the lower surface of the back floor portion 17. It moves in the direction indicated by the arrow D in FIG.

As shown in FIGS. 3 and 4, operating members 38 are attached to the tips of the pair of back raising arms 33, respectively. In the operating member 38, mounting portions 39 are bent at both ends of a plate having a predetermined length dimension, and a mountain-shaped cam portion 41 shown in FIG. 4B is formed between the pair of the mounting portions 39. It is formed.

As shown in FIGS. 3 and 4B, the operating member 38 fixes a pair of the mounting portions 39 to the tip of the back raising arm 33 so that the cam portion 41 faces downward of the back floor portion 17. It is provided.

As a result, when the back raising arm 33 moves downward with respect to the guide rail 35 as shown by the arrow D in FIG. 3, the operating member 38 also integrally moves with the back raising arm 33 in the direction of the arrow D. It will move.

As shown in FIG. 5, a head-up portion 43 is provided at the central portion on the tip end side (upper end side) of the backfloor portion 17. That is, a notch portion 17a is formed at the tip of the backfloor portion 17 by cutting out the upper end portion of the backfloor portion 17. The head-up portion 43 is provided on the backfloor portion 17 as described below with the tip portion facing the notch portion 17a.

The head-up portion 43 has a tubular head-up member 44 as shown in FIGS. 5 to 7. One ends of a pair of mounting levers 45 are fixed to both ends of the head-up member 44.

A step portion 46 is formed in the middle portion of the mounting lever 45, and one end portion and the other end portion of the base shaft 47 penetrate and are fixed to the other end portion. One end of the movable shaft 48 is pivotally attached to one end and the other end of the base shaft 47 so as to be bendable and bendable.

A roller-shaped transmission member 49 formed of a slippery resin or the like is provided at the other end of the movable shaft 48. Further, a collar 50 is slidably attached to the movable shaft 48 toward the end of the base shaft 47 as shown by an arrow in FIG.

By sliding the collar 50 in the direction of the arrow, that is, toward the movable shaft 48 from the state shown in FIG. 5, the movable shaft 48 can be bent with respect to the base shaft 47 as shown in FIG. 7A. it can. This state is defined as the non-operating position.

From the state of FIG. 7A, as shown in FIG. 6A, the movable shaft 48 is rotated so as to be in a straight line with respect to the base shaft 47, and the collar 50 is moved as shown by an arrow in the figure. It is slid from the movable shaft 48 side to the base shaft 47 side.

As a result, the collar 50 is elastically positioned and held on the base shaft 47 while straddling both the end portion of the base shaft 47 and the movable shaft 48. Therefore, the mounting shaft 48 is shown in FIG. 6A. As shown in the above, the base shaft 47 is held in an inflexible state in a straight line. This state is the operating position.

As shown in FIGS. 6 (b) and 7 (b), a first mounting hole 51 and a second mounting hole 52 are bored in the middle portion of the mounting lever 45. As shown in FIG. 5A, the first mounting hole 51 is rotatably inserted into one end and the other end of the support shaft 53.

As shown in FIGS. 5A and 5B, a horizontal rod 54 made of a square pipe is erected at the tip of the backfloor portion 17 over the entire length in the width direction. A pair of L-shaped mounting pieces 55 are provided on one side of the horizontal rod 54 at predetermined intervals. Both ends of the support shaft 53 are rotatably supported on the other side of the pair of mounting pieces 55.

Winding portions 57a of the torsion spring 57 as urging means are attached to both ends of the support shaft 53. As shown in FIG. 8, one straight portion 57b of the torsion spring 57 is engaged and held in a support hole 54a formed in the lateral rod 54.

A locking shaft 58 is mounted in the second mounting hole 52 in the middle of the mounting lever 45, and the other straight portion 57c of the torsion spring 57 is a support formed along the radial direction of the locking shaft 58. It is inserted and supported in the hole 58a.

As a result, the head-up portion 43 is elastically held by the torsion spring 57 in a state where the head-up member 44 is located in the notch portion 17a of the backfloor portion 17 as shown in FIG. ..

At this time, the step portion 46 formed in the middle portion of the mounting lever 45 is engaged with the lower surface of the horizontal rod 54. As a result, even if the load indicated by the arrow W in FIG. 5B is applied to the head-up member 44 of the head-up portion 43 from the upper surface side of the backfloor portion 17, the head-up member 44 still has the support shaft. Rotation to the lower surface side of the backfloor portion 17 with 53 as a fulcrum is prevented.

When a load is applied to the head-up member 44 from the lower surface side of the backfloor portion 17, the tip end side of the head-up portion 43, that is, the head-up member 44 elastically deforms the torsion spring 57 while supporting the shaft. It rotates toward the upper surface side of the backfloor portion 17 with 53 as a fulcrum.

When the pair of transmission members 49 of the head-up portion 43 are in the operating positions as shown in FIGS. 5 and 6A, their outer peripheral surfaces are formed by the pair of back-raising arms 33 as shown in FIG. The pair of actuating members 38 provided at the tip end face the cam surface 41a (shown in FIG. 4B) of the cam portion 41.

When the backfloor portion 17 is driven in the rising direction as shown by P2 and P3 from the collapsed state shown by P1 in FIG. 3, the operating member 38 is moved together with the backfloor arm 33 by the backfloor portion 17. When the guide rail 35 is moved downward as indicated by an arrow D in FIG. 3, the transmission member 49 of the head-up portion 43 is pressed according to the shape of the cam surface 41a.

As a result, the mounting lever 45 of the head-up portion 43 rotates about the support shaft 53, and the head-up member 44 provided on one end side of the mounting lever 45 is attached to the backfloor portion 17. It protrudes to the upper surface side. This state is shown in FIG.

The height at which the head-up member 44 projects toward the upper surface side of the backfloor portion 17 can be set by the shape of the cam surface 41a of the cam portion 41 of the operating member 38. In this embodiment, as shown by P1 in FIG. 3, when the rising angle of the backfloor portion 17 is 0 degrees and the backfloor portion 17 is horizontally laid down, the head-up member 44 rises. It is not driven in the direction and is flush with the backfloor portion 17.

As shown by P2 in FIG. 3, when the backfloor portion 17 is raised from a horizontal state at an angle of 30 degrees, the head-up member 44 has the maximum angle according to the shape of the cam surface 41a. It is set to be tilted at 45 degrees (indicated by θ1 in FIG. 1) with respect to the upper surface of the portion 17. This angle is shown by α in FIG.

As shown by P3 in FIG. 3, when the backfloor portion 17 is raised to the maximum angle of 80 degrees (indicated by θ2 in FIG. 1), the head-up portion 43 becomes the upper surface of the backfloor portion 17. The shape of the cam surface 41a is set so as to be inclined at an angle of 15 degrees shown by β in FIG.

In this way, the raised angle of the head-up portion 43 with respect to the upper surface of the backfloor portion 17 can be changed according to the raised angle of the backfloor portion 17. Therefore, the head of the user lying on the floor plate 11 according to the raised angle of the back floor 17 is moved forward in good condition by the head-up 43 via the mattress M shown in FIG. Can be tilted.

That is, when the backfloor portion 17 is raised at 30 degrees from the horizontally laid down state, the head-up member 44 can be raised at the maximum angle of 45 degrees indicated by α, and the backfloor portion 15 can be raised at 30 degrees. The standing angle of the head-up member 44 can be reduced as it is raised more than a degree, that is, the angle at which the user's head is pushed forward can be reduced.

As a result, the support angle of the user's head by the head-up member 44 can be changed according to the rise angle of the upper body of the user according to the rise angle of the backfloor portion 17. There is.

As shown by P3 in FIG. 3, when the backfloor portion 17 is raised at an inclination angle of 80 degrees, the head-up portion 43 is tilted at 15 degrees with respect to the upper surface of the backfloor portion 17. Therefore, the user's upper body and head are held at an angle that makes it easy to eat.

According to the bed device having the above-described configuration, the rising angle of the head-up portion 43 depends on the shape of the cam surface 41a of the cam portion 41 of the operating member 38 according to the rising angle of the backfloor portion 17. Can be set.

That is, in this embodiment, when the rising angle of the backfloor portion 17 is 0 degrees shown by P1 in FIG. 3, the rising angle of the head-up portion 43 is 0 degrees, and when the rising angle of the head-up portion 43 is 30 degrees shown by P2, it is 45 degrees. , When it is 80 degrees indicated by P3, it can be set to 15 degrees.

Therefore, the user is supported by the head-up member 44 of the head-up portion 43 via the mattress M so that the angle of the head becomes an optimum angle according to the rising angle of the backfloor portion 17. become.

Further, as shown by P1 in FIG. 3, when the floor plate body 11 is in a horizontally laid-down state, the head is lifted by the shape of the cam surface 41a of the cam portion 41 so that the user's head is lifted. The rise angle of the up portion 43 can be set. Thereby, the head-up portion 43 can be used instead of the pillow.

As shown in FIG. 6A, the head-up portion 43 is said to be in a state where the pair of transmission members 49 are held in a straight line with respect to the base shaft 47, that is, when the head-up portion 43 is held in the operating position by the collar 50. By undulating the backfloor portion 17, it is driven by the operating member 38.

On the other hand, as shown in FIG. 7A, if the collar 50 is slid to move the transmission member 49 from the operating position to the non-operating position, the head-up is performed even if the backfloor portion 17 is driven in a raised shape. The portion 43 is not driven and is held horizontally by the urging force of the torsion coil spring 7.

Therefore, the head-up function by the head-up unit 43 can be used as needed, which is convenient.

Moreover, after the backfloor portion 17 is raised to a predetermined angle while the transmission member 49 is in the non-operating position, the transmission member 49 is held in the operating position by the collar 50 and the head-up portion is held. When the transmission member 49 is brought into contact with the cam surface 41a of the cam portion 41 by rotating the 43 in the ascending direction against the urging force of the torsion spring 7, the head-up portion 43 is brought into contact with the backbed. It can be tilted and held according to the standing angle of the portion 17.

As described above, in the bed device having the above-described configuration, the back raising arm 33 that undulates and drives the back floor portion 17 is provided with the operating member 38 having the cam portion 41.

As a result, when the back raising arm 33 is driven to drive the back floor portion 17 in the rising direction, the transmission member 49 provided at one end of the head up portion 43 and held at the operating position. Is pressed by the cam surface 41a of the cam portion 41 to rotate the head-up portion 43, and the head-up member 44 provided at the other end of the head-up portion 43 is attached to the back. It is designed to protrude toward the front side of the floor portion 17.

Therefore, the head-up portion 43 can be operated in response to the rise of the back floor portion 17 with a simple configuration in which the actuating member 38 having the cam portion 41 is provided on the back-raising arm 33.

In other words, since the head-up function can be provided without using a link mechanism having a complicated configuration as in the past, the number of parts can be reduced by simplifying the configuration and productivity can be improved by facilitating the assembly work. be able to.

Moreover, the waist floor portion 16 pivotally attached to the back floor portion 17, which is the rotation center of the back floor portion 17, with respect to the rotation center A of the back drive shaft 26 that drives the back raising arm 33. The rotation center B of the above is shifted in the front-rear direction and the up-down direction.

As a result, when the backfloor portion 17 is driven in the rising direction, the operating member 38 provided at the tip of the backfloor arm 33 is along the guide rail 35 provided on the lower surface of the backfloor portion 17. Since it moves, the transmission member 49 of the head-up portion 43 is pressed by the cam surface 41a of the cam portion 41 of the operating member 38, and the head-up portion 43 can be tilted.

Therefore, since the head-up portion 43 is tilted as the backfloor portion 17 rises, a complicated link mechanism as in the conventional case is not required, which also simplifies the configuration and reduces the number of parts. It can be reduced.

When the backfloor portion 17 is undulated and driven when the transmission member 49 is positioned at the operating position shown in FIG. 6A, the cam portion 41 of the operating member 38 comes into pressure contact with the transmission member 49. ..

When the cam portion 41 is pressed against the transmission member 49, the transmission member 49 is provided at one end, the head-up member 44 is provided at the other end, and the intermediate portion is pivotally supported by the backfloor portion 17. The lever 45 rotates about the middle part as a fulcrum.

As a result, the head-up member 44 of the head-up portion 43 projects toward the front surface side of the backfloor portion 17 and presses the user's head forward via the mattress M.

Since the transmission member 49 can be folded at both ends of the base shaft 47 provided on the head-up portion 43, the transmission member 49 does not hit the cam portion 41 and the operating position that hits the cam portion 41 when the back is raised. It can be positioned at any of the non-operating positions.

Therefore, when the backfloor portion 17 is undulated and driven, whether or not the head-up member 44 is operated by the cam portion 41 by positioning the transmission member 49 at either the operating position or the non-operating position. Can be selected.

That is, it is convenient because it is possible to select whether or not to press and lift the user's head by the head-up portion 43 when raising the back, depending on whether or not the user needs it.

The mounting lever 45 of the head-up portion 43 is rotatably supported in the middle portion by the horizontal rod 54 erected in the width direction of the backfloor portion 17. The mounting lever 45 is elastically urged in the rotational direction by a torsion spring 57, which is an urging means.

The step portion 46 that engages with the lower surface of the horizontal rod 54 is formed in the middle portion of the mounting lever 45, and the tip end side of the head-up portion 43 rotates downward by the urging force of the torsion spring 57. Is blocked.

That is, the head-up portion 43, which is in a state of being laid down so as to form the same plane as the backfloor portion 17, is with respect to the rotation direction due to the urging force by the torsion spring 57 and the engagement between the step portion 46 and the lateral rod 54. It is held elastically without rattling.

Therefore, even if the transmission member 49 is set to the non-operating position and the backfloor portion 17 is undulated and driven, the head-up portion 43 is in a state of being flush with the backfloor portion 17 and rattles in the rotation direction. It can be used without sticking.

In one embodiment described above, the back raising roller is rotatably provided on the back raising arm as an engaging member, but the back floor portion is used as the engaging member instead of the back raising roller. It may be a sliding member that moves along the guide rail as a guide portion when driven up and down. That is, the engaging member is not limited to the back raising roller.

The guide rail having a U-shaped cross section is used as the guide portion, but the guide portion has a structure in which the engaging member can be moved by the undulating drive of the floor plate portion, for example, the guide portion has an inverted T shape. The cross-sectional shape may be such that the engaging member has an inverted T-shaped groove inserted into the guide portion. In short, the engaging member is formed in the guide portion according to the undulating drive of the floor plate portion. Any structure may be used as long as it can move along the structure.

The structure in which one end of the backfloor portion is rotatably attached to the bed frame via the waist floor portion has been described as an example, but one end portion of the backfloor portion is directly rotated to the bed frame. The structure may be movably attached.

In short, when the backfloor portion is driven in the rising direction, the backfloor portion is raised so that the operating member provided at the tip end portion of the backfloor arm moves toward the tip end portion of the backfloor portion that rises. It suffices that the rotating positions of the arm and the backfloor portion are set.

The back drive unit made of a linear motor was used as the driving means for undulating the back floor portion, but the back floor portion is driven by undulating drive instead of the rotary motion of a drive unit other than the linear motor, for example, the linear motion. It may be a driving unit.

1 ... Bed frame, 11 ... Floor plate body, 12 ... Fixed floor part, 13 ... First leg floor part, 14 ... Second leg floor part, 16 ... Waist floor part, 17 ... Back floor part, 21 ... Drive device , 23 ... Leg drive unit, 24 ... Back drive unit (drive means), 25 ... Leg drive shaft, 26 ... Back drive shaft, 33 ... Back lift arm, 34 ... Back lift roller (engagement member), 35 ... guide rail (guide part), 38 ... actuating member, 41 ... cam part, 43 ... head-up part, 44 ... head-up member, 49 ... transmission member, 50 ... collar.

Claims (5)

Bed frame and
A backfloor portion having one end rotatably provided on the bed frame and a guide portion provided along a longitudinal direction intersecting the width direction on the lower surface side.
A head-up portion having a rotatably provided midway portion at the other end of the backfloor portion,
A drive shaft arranged on the bed frame with an axis line along the width direction of the bed frame with a position different from one end of the back floor portion as the center of rotation.
The drive means for driving the drive shaft and
Having an engaging member that engages with the guide portion, one end thereof is attached to the driving shaft, and the driving means is operated to rotate and drive the drive shaft together with the driving shaft, so that the back is driven through the engaging member. A back-raising arm that links the floor and
It is provided with an operating member provided at the other end of the back raising arm so that one end of the head-up portion abuts and the other end of the head-up portion is inclined so as to project toward the upper surface side of the back floor portion. A bed device that features that. When the back-raising arm is driven by the driving means to undulate and drive the back-floor portion, the actuating member is moved by the difference in the rotation center position of each one end of the back-floor portion and the back-raising arm. The bed device according to claim 1, wherein the operating member tilts and holds the head-up portion by moving integrally with the back-raising arm along the longitudinal direction of the guide portion. At one end of the head-up portion, a transmission member that can be positioned at an operating position that abuts on the operating member and a non-operating position that does not abut is provided.
By positioning the transmission member at the operating position and bringing it into contact with the operating member, the head-up portion can be held in an inclined state in which the other end portion projects toward the front surface side of the back-raising portion.
Claim 1 or claim 1, wherein the transmission member is positioned at the non-operating position so that the head-up portion can be held in a state where the other end portion does not protrude toward the upper surface side of the backfloor portion. The bed device according to claim 2. The backfloor portion is provided with an urging means for urging the headup portion in the rotational direction so that the other end portion of the headup portion does not protrude toward the upper surface side of the backfloor portion.
When the transmission member is positioned at the operating position and comes into contact with the operating member, the other end of the head-up portion projects toward the upper surface side of the backfloor portion against the urging force of the urging means. Inclined,
When the transmission member is positioned at the non-operating position, the head-up portion returns to a state in which the other end portion does not protrude toward the upper surface side of the backfloor portion by the urging force of the urging means. The bed device according to claim 3. The bed frame is provided with a fixed floor portion fixed to the bed frame, and one end of the waist floor portion is rotatably connected to one end of the fixed floor portion and is connected to the other end of the waist floor portion. One end of the backfloor portion is rotatably connected and
One end of the back raising arm is connected to the drive shaft arranged on the waist floor side from one end of the fixed floor portion.
When the back raising arm is rotated in the rising direction due to a positional deviation between one end of the waist floor portion connected to the fixed floor portion and one end connected to the drive shaft of the back raising arm. The bed device according to claim 1, wherein the engaging member provided on the back raising arm moves along the guide portion along the lower surface of the back floor portion in the downward direction in the longitudinal direction.

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