JP2953581B1 - Back raising mechanism in bed - Google Patents

Abstract

Abstract: [PROBLEMS] To suppress displacement of the body and pressure on the body as much as possible when raising the back. SOLUTION: A back bottom 3 corresponding to a back is supported by a back frame 5 movably mounted on a distal end side along rollers 8 and 8 along a guide path 4a of a guide member 4, and the back frame is provided. The drive mechanism is connected to the frame 5. The guide path 4a formed in the guide member 4 has a radius of curvature assuming the vicinity of the center of curvature O from the back bottom 3 to the waist bottom 7 on the mattress M.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bed provided with at least a back-raising mechanism, which is capable of minimizing body displacement and pressure on the body when the back is raised. It is.

[0002]

2. Description of the Related Art In a bed up-and-down mechanism (back-raising and knee-raising mechanism) in a bed, that is, a gatch mechanism, a divided bottom is hinged in many cases so as to correspond to the back by a driving mechanism. The bottom has been raised by a drive mechanism, and on the foot side, the bottom corresponding to the sole of the knee and the foot bottom corresponding to the shin have been raised by a drive mechanism or an interlocking mechanism. For this reason, when raising the back, the bottom corresponding to the back inclines, the back is pushed out toward the foot side, the body is displaced, and furthermore, the bent parts around the back, waist, and thigh are improper. This was a factor that caused a natural feeling of oppression. Therefore, the applicant has
Although not shown, a back-raising mechanism having a retract function that functions to tilt the support frame supporting the back bottom while displacing it toward the head when raising the back has been proposed. According to such a mechanism, even when raising the back, a space from the back bottom to the waist bottom can be ensured, and pressure on the abdomen of the patient is reduced, which contributes to enhancing comfort.

[0003]

The present applicant further pushes such a back-raising mechanism, proposes various improvement plans, and as a result of trial and error, as a result of bending and extending to the back, waist, and thighs of the human body, It has been found that a mechanism that ideally coincides with the rotational center position of the back bottom can minimize displacement, pressure, and the like caused by raising the back. The present invention has been proposed in order to achieve such a problem, and at least in a bed provided with a back raising mechanism, when the back is raised, displacement of the body, pressure on the body can be suppressed as much as possible. It is an object of the present invention to provide a back raising mechanism in a bed.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a back bottom corresponding to a back of a bed in a guide path of a guide member provided below the bottom, and a distal end in a guide path. Along with supporting a back frame movably mounted along the back frame, a drive mechanism is coupled to the back frame, and the guide path is formed in a curved shape having a predetermined curvature, which is convex toward the bottom of the bed. By activating the drive mechanism, the back frame is moved along the guide path of the guide member at the distal end, so that the back bottom is displaced toward the bed head and tilted. Further, according to the present invention, the back bottom corresponding to the back provided to be able to undulate with respect to the waist bottom corresponding to the waist of the bed is moved to the guide path of the guide member provided below the bottom, and the distal side is moved along the guide path. While being supported by a back frame frame that is mounted as possible, a drive mechanism is connected to the back frame frame, and the guide path has a radius of curvature assuming the vicinity of the center of curvature from the back bottom to the waist bottom on the mattress, By activating the drive mechanism and moving the back frame frame along the guide path in the guide member, the back bottom moves the center of curvature of the guide path near the top of the mattress from the back bottom to the waist bottom. Is tilted about the center of rotation. In addition, the present invention also connects the back bottom corresponding to the back of the bed to the waist bottom corresponding to the waist so as to be tiltable via a curved bottom configured to bend the lower part of the bed convexly at a predetermined curvature. The back bottom is supported by a back frame mounted on a guide path of a guide member provided below the bottom so that the distal end is movably mounted along the guide path, and a driving mechanism is connected to the back frame. The guide path has a radius of curvature assuming the vicinity of a curved bottom from the back center to the waist bottom with the center of curvature on the mattress, and activates the drive mechanism to move the back frame along the guide path in the guide member. Moving the distal end side to tilt and displace the back bottom about the center of curvature of the guide path near the mattress on the mattress on the curved bottom from the back bottom to the waist bottom. It was. Further, in the above-described configuration, the driving mechanism has a starting shaft that moves forward and backward in the axial direction. By moving the starting shaft of the driving mechanism backward, the base end side of the back frame is moved along the guide path. The drive mechanism was arranged so that the back bottom was tilted and adjusted.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a back raising mechanism in a bed according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a bed 1 provided with a back raising mechanism (described later). The back lifting mechanism 2 of the bed 1 includes a back bottom 3 corresponding to the back and a guide member 4 having an arc-shaped guide path 4a provided on a main frame (not shown) below the bottom. The rear frame is supported by a back frame 5 movably mounted along the end 4a, and a drive mechanism (not shown) is connected to the back frame 5.

As shown in FIG. 2, the guide member 4 can be formed by well-known processing steps such as aluminum extrusion molding, die casting and the like. For example, the guide member 4 is attached to longitudinal side members (not shown) of the main frame. It is configured to be screwed through the hole 6. The guide path 4a formed in the guide member 4 is, as shown in FIG.
It has a radius of curvature assuming the vicinity of the center of curvature O on the mattress M from the back bottom 3 to the waist bottom 7.

The back frame 5 has a pair of vertical frames 5a having a side shape and a substantially wedge shape, which are attached to the back surface of the back bottom 3. These vertical frames 5a are processed so as to have an L-shaped cross section, and the rollers 8, 8 are movably fitted into the guide paths 4a of the guide member 4 at both outer end surfaces with the wider width as a base end. Are provided in pairs. Further, a horizontal pipe 9 is provided between the vertical frames 5a on the distal end side and the proximal end side, respectively.
The starting shaft (linear motion shaft) of a drive mechanism (not shown) (for example, a linear motion drive mechanism) is attached to the center of the horizontal pipe 10 on the base end side of the vertical frame 5a.
The starting bearing 11 is provided in a protruding manner.

[0010] In addition to the back frame 5, a back frame 12 having a shape shown in FIG. 3 can be applied. In this case, the back frame 12 has a substantially U-shaped cross section of the vertical frame 12a. Further, the side surface shape of the vertical frame 12a is substantially wedge-shaped, and the larger width dimension is used as a base end,
A pair of rollers 13, 13 are rotatably interposed inside the base end. Further, the vertical frame 12a is connected to the distal end side and the proximal end side by horizontal pipes 14 and 15, respectively, and an activation shaft of a linear drive mechanism is attached to the center of the horizontal pipe 15 on the vertical end side of the vertical frame 12a. , A starting bearing 16 is protruded.

Here, the vertical frame 5a of the back frame 5
The rollers 8, 8 on the base end side of the guide member 4
In order to move to the maximum, the stroke of the starting shaft in the linear drive mechanism is 423 m.
m. Further, when the back bottom 3 is in the maximum inclination state, the displacement amount (retra amount) to one bed side is 60 m.
m. Further, the elongation is 231 mm.

The back raising mechanism of the bed according to the present invention is configured as described above. Next, the operation will be described. When the linear drive mechanism is activated and the back is lifted from the flat state of the back frame 5, the activation shaft of the linear drive mechanism acts on the activation bearing 11 of the back frame 5, and the vertical axis of the back frame 5 is vertical. The rollers 8, 8 on the base end side of the frame 5a move along the guide path 4a of the guide member 4, and the back frame 5 gradually inclines. For this reason, the back frame 5, that is, the back bottom 3 is shifted toward one bed side, and when the rollers 8, 8 reach the left end side of the guide path 4 a of the guide member 4 in the figure, The back frame 5, that is, the back bottom 3, is in a state of being inclined at the maximum angle. Thus, the back bottom 3 is attached to the back frame 5
By performing the tilting operation together with the displacement of the
The patient on the mattress M is not pushed back to the foot side, and the bent portion of the patient's back, waist, and thigh is the center of curvature O of the guide path 4a of the guide member 4, that is, the back frame. Since the patient is at a position substantially coincident with the substantial center of rotation of the back bottom 3 connected to the frame 5, the patient is not squeezed through the mattress M on the back bottom 5 and does not feel discomfort.

The back raising mechanism of the bed according to the present invention can be configured as follows. As shown in FIG. 4, the bed 20 divides a bottom 21 into a back bottom 21a, a waist bottom 21b, a knee bottom 21c, and a foot bottom 21d.
1b, and between the knee bottom 21c and the foot bottom 21d, a curved bottom 2 having a structure that bends at an appropriate curvature.
2 and 23 are arranged respectively. In the bed 20, a guide member 24 having an arc-shaped guide path 24a is provided on a main frame (not shown) below the bottom 21.
Frame 2 that supports the back bottom 21a
The rollers 26, 26 on the base end side of the vertical frame 25a having a substantially wedge-shaped side surface in FIG.
It is mounted movably along 4a. In the arcuate guide path 24a in this case, the curvature center O is assumed to be near the curved bottom 22 on the mattress M from the back bottom 21a to the waist bottom 21b. In the back raising mechanism of the bed 20, the radius of curvature of the guide path 24a is smaller than the radius of curvature of the guide path 4a of the guide member 4 in the previous example, so that the vertical frame 25a of the The stroke of the starting shaft in the linear drive mechanism for the rollers 26, 26 on the base end side to move to the maximum along the guide path 24a of the guide member 24 is 23.
1 mm, and the displacement (retra) of the back bottom 21a toward the head of the bed 20 is 19 mm, and the elongation is 4 mm.
5 mm.

In the bed 20 as described above, when the linear drive mechanism is activated to perform the back raising operation, the rollers 26, 26 on the base end side of the vertical frame 25a in the back frame 25.
Moves along the guide path 24a of the guide member 24, and the back bottom 21a performs a tilting operation together with the displacement of the back frame frame 25 toward the head of the bed 20. It is not pushed out to the side,
At this time, the curved bottom 22 between the back bottom 21a and the waist bottom 21b is curved with an appropriate curvature to secure a space, and the patient is squeezed through the mattress M on the back bottom 5 to cause discomfort. There is nothing to remember.

The back raising mechanism in the bed according to the present invention can be further configured as follows. In the back raising mechanism in this case, as shown in FIG.
0, a link 32 for transmitting power from a starting shaft 31a of the linear drive mechanism 31 is attached to a back frame 30 supporting the back bottom 21a. As shown in FIG. 6, the back frame 30 has a pair of vertical frames 30a having an L-shaped cross section at the base end side, the opening-side end of the U-shaped link 32 and the vertical frame 30a at the tip end of the link 32. It is attached so that it is inclined with respect to. At the center of the horizontal pipe 33 attached to the distal end of the link 32, a starting bearing 34 for connecting the starting shaft 31a of the linear drive mechanism 31 is protruded. Further, a roller 35 is provided on the base end side of the vertical frame 30a in the back frame 30.
It is movably mounted along a guide path 36a of a guide member 36 attached to a main frame (not shown) below the bottom 21. The guideway 36a in this case has a larger radius of curvature than the guideways 4a and 24a of the previous example, and
The length of the linear drive mechanism 31 is set to a limited length such that the stroke of the starting shaft 31a is 282 mm.
The guide path 36 a is arranged such that the end near the bed 20 is approached immediately below the bottom 21. Further, the linear drive mechanism 31 is provided with a motor casing 31b having a built-in motor at a position from the tip of the back bottom 21a, and extending the start shaft 31a to thereby form a back frame via the start bearing 34 of the link 32. The frame 30 is pushed up to tilt the back bottom 21a.
Further, the linear drive mechanism 31 is provided with the motor casing 3.
1b may be installed on the main frame immediately below the waist bottom 21b. In this case, the starting bearing 31 of the link 32 is set in a state where the starting shaft 31a is extended in advance.
4 and retreating the starting shaft 31a, the back frame 30 is pulled up via the starting bearing 34 of the link 32, and the back bottom 21a is inclined.

As described above, various embodiments of the back raising mechanism in the bed according to the present invention have been shown and described. In any case, the back frame supporting the back bottom when raising the back is used. Since it can be displaced toward the head of the bed so as to be pulled in and can be operated to tilt the back bottom, it is possible to suppress the patient from being pressed through the back bottom. Also, at this time, by changing the shape and the radius of curvature of the guide path of the guide member, the operation stroke of the drive mechanism and the locus of the back bottom can be freely set. The side can be displaced to retract and operated to tilt the back bottom.

[0015]

According to the present invention, with a simple structure, when raising the back, the back bottom is displaced away from the bed head side,
Pressure on the patient can be reduced, and comfort is ensured. Also, at this time, the operating stroke of the drive mechanism and the locus of the back bottom can be freely set by changing the shape of the guide path of the guide member and the radius of curvature of the back frame frame supporting the back bottom. While displacing the supporting back frame toward the bed head,
Since the back bottom can be operated to be inclined, it is possible to approach an ideal back up. further,
The structure can be simplified, the number of parts can be reduced, and the manufacturing cost can be suppressed, as compared with the back lifting mechanism combining the existing links.

[0016]

[Brief description of the drawings]

FIG. 1 is a schematic side explanatory view showing an embodiment of a back raising mechanism in a bed according to the present invention and a locus of a back bottom by the back raising mechanism.

FIG. 2 is a schematic perspective explanatory view showing an example of a back frame supporting a back bottom in the bed shown in FIG. 1;

FIG. 3 is a schematic perspective explanatory view showing another example of the back frame supporting the back bottom in the bed shown in FIG. 1;

FIG. 4 shows another example of the back raising mechanism in the bed according to the present invention and the locus of the back bottom by the back raising mechanism.
It is a typical side view explanatory drawing.

FIG. 5 is a schematic side view showing another example of the back-raising mechanism in the bed according to the present invention and the locus of the back bottom by the back-raising mechanism.

FIG. 6 is a schematic perspective explanatory view showing an example of a back frame supporting the back bottom in the bed shown in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bed 2 Back raising mechanism 3 Back bottom 4 Guide member 4a Guideway 5 Back frame 5a Vertical frame 6 Mounting hole 7 Waist bottom 8 Roller 9, 10, 14, 15 Horizontal pipe 11, 16 Starting bearing 12 Back frame 12a Vertical Frame 13 Roller 20 Bed 21 Bottom 21a Back bottom 21b Waist bottom 21c Knee bottom 21d Foot bottom 22,23 Curved bottom 24 Guide member 24a Guide path 25 Back frame 25a Vertical frame 26 Roller 30 Back frame 30a Vertical frame 31 Linear drive Mechanism 31a Starting shaft 32 Link 33 Horizontal pipe 34 Starting bearing 35 Roller 36 Guide member 36a

Claims (4)

(57) [Claims] 1. A back bottom corresponding to a back of a bed is supported on a guide path of a guide member provided below the bottom, and a back frame is mounted on a back frame movably mounted at a distal end thereof along the guide path. Connect the drive mechanism to the frame,
The guide path is formed in a curved shape having a predetermined curvature, which is convex toward the bottom of the bed , and activates the drive mechanism.
A back raising mechanism for a bed, wherein the back bottom frame is displaced toward the bed head side and tilted by moving the back frame frame along the guide path of the guide member. 2. A back bottom corresponding to a back provided to be able to undulate with respect to a waist bottom corresponding to a waist of a bed is moved along a guide path on a distal end side to a guide path of a guide member provided below the bottom. While being supported by a back frame frame that is mounted as possible, a drive mechanism is connected to the back frame frame, and the guide path has a radius of curvature assuming the vicinity of the center of curvature from the back bottom to the waist bottom on the mattress, By activating the drive mechanism, the back frame is moved on the distal side along the guide path in the guide member, so that the back bottom is
A back-raising mechanism in a bed, characterized in that the center of curvature of the guideway near the mattress from the back bottom to the waist bottom is tilted and displaced about a center of rotation. 3. A back bottom corresponding to the back of the bed is tiltably connected to a waist bottom corresponding to the waist via a curved bottom having a configuration in which the lower part of the bed is curved convexly at a predetermined curvature below the bed. The back bottom is supported by a back frame mounted on a guide path of a guide member provided below the bottom so that the distal end is movably mounted along the guide path, and a driving mechanism is connected to the back frame. The guide path has a radius of curvature assuming the vicinity of a curved bottom from the back center to the waist bottom with the center of curvature on the mattress, and activates the drive mechanism to move the back frame along the guide path in the guide member. By moving the distal end side, the back bottom is tilted and displaced about the center of curvature of the guide path near the mattress on the mattress on the curved bottom from the back bottom to the waist bottom as the center of rotation. Back raising mechanism in the bed characterized by doing. 4. The drive mechanism has a starting shaft that moves forward and backward in the axial direction. By moving the starting shaft of the driving mechanism backward, the base end of the back frame is moved along the guide path. The mechanism for raising the back of a bed according to any one of claims 1 to 3, wherein the drive mechanism is arranged to move the back bottom to adjust the inclination of the back bottom.