JP2700056B2 - Bed bottom structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of disposing a curved bottom configured to be able to bend at an appropriate curvature on the bottom of a bed provided with an up-and-down mechanism so that the curved bottom bends at an appropriate curvature when the bottom is displaced. Thus, the present invention relates to a bottom structure of a bed in which a bent portion of a body that is different in position depending on a user can be supported by a curved bottom without a sense of incongruity, a feeling of pressure on the body is eliminated, and strength is improved.

[0002]

2. Description of the Related Art In recent years, beds having a bottom undulating mechanism have been widely used regardless of whether they are for hospitals or homes. Of the bottom raising and lowering mechanisms, the one configured to raise the back and the legs by electric power is used because the user himself / herself can arbitrarily adjust the support state of the bottom and take a desired posture. It is convenient for caregivers as well as caregivers. However, the bottom is formed by simply dividing the plurality of divided portions into a rotatable shaft and sequentially rotating the bottom to a certain extent. When the bent portion is displaced from the bent portion of the user's body, the user's body is pressed by the bent portion, which makes it extremely difficult to use and lacks comfort. Therefore, the present applicant provides a curved bottom 3 in which subdivided strip-shaped bottoms are sequentially connected to a connection point, for example, a connection point between a knee bottom 1 supporting a thigh portion and a leg bottom 2 supporting a shin portion. Disposed, the curved bottom 3 is supported by an undulating arm 5 via a roller 4 or the like,
By bending the curved bottom 3 with an appropriate curvature, even if there is a slight deviation between the curved portion of the curved bottom 3 and the bent portion of the user's body, the bed can support the user without discomfort. Has already been proposed (see FIG. 7).

[0003]

However, according to the structure in which the curved bottom 3 is supported by the undulating arm 5 via the roller 4 as described above, the roller 4 and the curved bottom 3 are not supported.
The contact area is small and the curved bottom 3
The load concentrates on the contact point between the roller and the roller 4, causing a problem in durability, and a fear of breakage. In view of the above, the present invention has been proposed in view of the above-mentioned circumstances, and has a configuration in which the bottom is curved with an appropriate curvature, so that the curved portion of the bottom is adapted to the bent portion of the user's body, thereby improving comfort. It is an object of the present invention to provide a bottom structure in a bed which is excellent in strength.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a bed provided with a mechanism for raising and lowering a bottom. Forming a location, forming a predetermined recess in both bottoms, placing a curved bottom in this recess,
At the connection point, a surface facing the curved bottom is formed in a convex shape, so that the curved bottom is supported through the convex surface at the connection point when the bottom is displaced, and when the bottom is maximally displaced, the curved bottom is bent. It is characterized in that the bottom and the convex surface at the connection point are in contact with a maximum contact area. Further, according to the present invention, in a bed provided with a bottom undulating mechanism, a first connecting member and a second connecting member are provided so as to protrude from one side of an adjacent bottom among the plurality of divided bottoms. The two bottoms are rotatably connected via the first connection member and the second connection member, and the first and second bottoms are connected to each other.
A curved bottom is placed on the projecting portion of the second connecting member, and the connecting portions of the first and second connecting members are each curved in a direction away from the curved bottom, and the first and second connecting members are respectively bent. In the meantime, when the bottom is flat, an auxiliary member that contacts the curved bottom and supports the curved bottom is provided so as to be bridged, and this auxiliary member is movably connected to one of the first and second connecting members. In the first and second connecting members, the surface facing the curved bottom is formed in a convex shape, and when the bottom is displaced, the curved surface is formed via the convex surface in the first and second connecting members and the auxiliary member. The bottom is supported, and at the time of the maximum displacement of the bottom, the curved bottom and
The convex surface of the first and second connecting members and the auxiliary member are configured to contact with a maximum contact area.

[0005]

When the bottom is flat, the connection point and the curved bottom are in contact via the flat surface of the connection point, and support the curved bottom in a flat state. Here, when the bottom is displaced by the activation unit, the connection portion rises in a state of contact with the curved bottom together with the displacement of the bottom, and the convex surface at the connection portion contacts the curved bottom, and the bottom maximum displacement At times, the convex surface of the connection point and the curved bottom come into contact with the maximum contact area. by this,
The curved bottom is curved with an appropriate curvature. Further, by increasing the contact area between the curved bottom and the convex surface of the connecting portion, the strength is improved without applying a load locally. On the other hand, between the first and second connecting members,
When the bottom is flat, the auxiliary member that contacts the curved bottom and supports the curved bottom is arranged.Since the auxiliary member is in contact with the curved bottom when the bottom is flat,
The depression of the first and second connecting members can be complemented.
And when the bottom is displaced to the maximum displacement state,
The convex surfaces of the first and second connecting members are brought up to the position of the auxiliary member, and the convex surfaces of the first and second connecting members and the auxiliary member allow the curved bottom to have a larger contact area. Can be supported.

[0006]

Next, a bottom structure of a bed according to the present invention will be described with reference to the accompanying drawings, taking an embodiment as an example. FIG. 1 shows a bed 10 provided with a bottom raising / lowering mechanism. In a frame 13 on a base frame 12 provided with casters 11, a knee bottom 14a for supporting a thigh and a leg bottom 1 for supporting a shin among the bottoms 14.
4b shows the mounting configuration. The bed 10 has a mechanism for raising and lowering the bottom 14, ie, a mechanism for raising the back (not shown),
It is provided with a leg raising mechanism (not shown). The knee bottom 14a and the leg bottom 14b are rotatably connected to each other, and an operating arm 15 is fixed to the knee bottom 14a, and the operating arm 15 is connected to a starting portion constituting the leg raising mechanism. Then, the knee arm 14a and the leg bottom 14b are interlockingly displaced by displacing the operating arm 15 by the activation unit. A support roller 16 is provided at the end of the leg bottom 14b to be in contact with the frame 13. The support roller 16 further moves between the frame 13 and the frame 13 at the intermediate portion when the leg bottom 14b is displaced. There is provided a support stay 17 for supporting it so as not to be disturbed. The support stay 17 is selectively locked to a locking plate 18 provided on the frame 13 side and having a plurality of locking teeth according to the degree of displacement of the leg bottom 14b. Through the leg bottom 14b at a plurality of predetermined positions.
Is fixedly held.

The knee bottom 14a and the leg bottom 14b have recesses 19, 20 at a predetermined length on both sides from a location where they are connected to each other.
, A curved bottom 21 is mounted over the bridge. When the bottom 14 is flat at the connection point between the knee bottom 14a and the leg bottom 14b, the tip of each connection point is projected toward the frame 13 and the knee bottom 1
The surface facing the curved bottom 21 at the time of the maximum displacement of the leg 4a and the leg bottom 14b is formed in a cylindrical outer peripheral shape, and the cylindrical outer peripheral surface of the knee bottom 14a and the leg bottom 14b comes into contact with the curved bottom 21. , Curved bottom 21
Is supported in a curved state with a predetermined curvature. In this case, the contact area between the curved surface and the cylindrical outer peripheral surface of the knee bottom 14a and the leg bottom 14b is set to be maximum when the knee bottom 14a and the leg bottom 14b are maximally displaced (FIG. 3).

Now, the structure of the curved bottom 21 will be described. As shown in FIG.
For example, a plurality of strip-shaped rigid portions 21a,
Bending portion 2 that connects between 1a and extends and contracts in the longitudinal direction of the bottom
1b, a lid member is attached to an end face in the bed width direction of the rigid body portion 21a, and the adjacent rigid body portions 2a
1a are connected by a connecting rod (not shown) movably via the lid member. With such a configuration, the curved bottom 21 is configured such that the upper surface of the curved bottom 21 in the figure is bent upward with an appropriate curvature under the restraint of the connecting rod by the bent portion 21b extending in the bottom longitudinal direction. ing. The curved bottom 21 may have another configuration.

The function and operation of the bottom structure of the bed configured as described above will be described. When the bottom 14 is flat, the connection point and the curved bottom 21 come into contact via the flat surface of the connection point, and the curved bottom 2
1 is supported in a flat state. Here, when the knee bottom 14a and the leg bottom 14b are displaced via the operating arm 15 by the activation unit of the leg raising mechanism, the connection point between the knee bottom 14a and the leg bottom 14b is brought into contact with the curved bottom 21. When the bottom 14 is maximally displaced, the knee bottom 1
4a and the cylindrical outer peripheral surface of the leg bottom 14b and the curved bottom 21 are in contact with a maximum area, and the curved bottom 21 is
A state of being supported in a curved state with a predetermined curvature (FIG. 1,
(See FIG. 3). As described above, since the curved bottom 21 is supported in a curved state having a predetermined curvature, even if the bent portion of the leg of the user, that is, the position of the knee back joint and the curved portion of the curved bottom 21 are slightly displaced, uncomfortable feeling is obtained. The user can hold the user's leg in a state where there is little, and the cylindrical outer peripheral surface of the knee bottom 14a and the leg bottom 14b and the curved bottom 2 can be held.
Since the load does not concentrate locally due to the increase in the contact area with No. 1, there is no possibility of breakage or the like, and the strength is improved.

[0010] The bottom structure of the bed according to the present invention can also be configured as follows. That is, in this bed 30, as shown in FIG. 4, a knee bottom 14a for supporting the thigh and a leg bottom 14b for supporting the shin are provided on the back side of the knee bottom 14a and the leg bottom 14b, respectively. Connecting member 31 and second connecting member 3
2 so as to be rotatably connected. The first and second connecting members 31, 32 are connected to the knee bottom 14a.
The leg bottom 14b is protruded from the knee bottom 14a and the leg bottom 14b so that a predetermined space is provided between the leg bottom 14b and the leg bottom 14b. Also, the first connecting member 3 in the knee bottom 14a
1, an operating arm 31a protrudingly connected to a starting portion constituting a leg raising mechanism. And the knee bottom 14a
Between the first and second connecting members 3
Curved bottom 21 is placed so as to be attached to 1, 32,
The connecting portions of the first and second connecting members 31 and 32 are each shaped to be curved in a direction away from the curved bottom 21, and between the first and second connecting members 31 and 32 when the bottom 14 is flat. As shown in FIG. 5, an auxiliary member 33 having an arcuate cross-section, which is in contact with the curved bottom 21 and supports the curved bottom 21, is provided so as to bridge the same. The auxiliary member 33 has one end rotatably attached to the first connecting member 31 and the other end connected to the second connecting member 32.
Are rotatably connected via a long hole 34 formed therein, and are movably connected within the long hole 34. In the first and second connecting members 31 and 32, the surface facing the curved bottom 21 is formed in a cylindrical outer peripheral shape, and when the bottom 14 is maximally displaced,
A curved bottom 21 and the first and second connecting members 31 and 32
(See FIG. 6) in which the cylindrical outer peripheral surface and the auxiliary member 33 contact with the maximum contact area.

According to the bottom structure of the bed as described above, since the auxiliary member 33 is in contact with the curved bottom 21 when the bottom 14 is flat, the first and second connecting members 31, 3
2 dents can be complemented. When the knee bottom 14a and the leg bottom 14b are displaced to the maximum displacement state by the activation part of the leg raising mechanism, the cylindrical outer peripheral surfaces of the first and second connecting members 31 and 32 become auxiliary members 33. And the first and second connecting members 31 and 32 and the auxiliary member 33 can support the curved bottom 21 with a larger contact area. Even if it is displaced from the bending position of the user, the user does not receive pressure from the bottom, it is comfortable without discomfort, and it is locally applied by supporting with a small contact area like a roller The adverse effect of the load can be eliminated, and there is no problem in strength.

[0012]

As described above, according to the present invention, the curved bottom can be brought into a curved state with an appropriate curvature, and the contact area between the curved bottom and the curved surface of the connecting portion is increased, The curved position of the curved bottom can have a width, and it can sufficiently follow the displacement of the flexing and stretching points of the body due to the difference in the physique of the user, eliminating the feeling of pressure on the body and high comfort Can bring. In addition, since the contact area between the curved bottom and the connecting portion supporting the curved bottom can be made much larger than that of the roller-supporting means, the load is not locally applied, and the strength is dramatically increased. improves.

[0013]

[Brief description of the drawings]

FIG. 1 is a schematic side elevational view showing an embodiment of a bed having a bottom structure according to the present invention.

FIG. 2 is a schematic partial enlarged side view of a connecting portion when the bottom of the bed shown in FIG. 1 is flat.

FIG. 3 is a schematic partial enlarged side view of a connecting portion when the bottom of the bed shown in FIG. 1 is maximally displaced.

FIG. 4 is a schematic side elevational view showing another embodiment of a bed having a bottom structure according to the present invention.

FIG. 5 is a schematic partial enlarged side view of a connecting portion of the bed shown in FIG. 4 when the bottom is flat.

FIG. 6 is a schematic partial enlarged side view of a connecting portion when the bottom of the bed shown in FIG. 4 is maximally displaced.

FIG. 7 is a schematic side elevational view showing a main part of a bed having a bottom structure at present.

[Explanation of symbols]

 10 Bed 11 Caster 12 Base Frame 13 Frame 14 Bottom 14a Knee Bottom 14b Leg Bottom 15 Working Arm 16 Support Roller 17 Support Stay 18 Locking Plate 19, 20 Depression 21 Curved Bottom 21a Rigid Body 21b Bend 30 Bed 31 First Connecting Member 31a working arm 32 second connecting member 33 auxiliary member

Claims (2)

(57) [Claims] In a bed provided with a mechanism for raising and lowering a bottom, a plurality of divided bottoms are sequentially rotatably connected, and a connection portion is formed. A predetermined recess is formed in both bottoms. A curved bottom is placed in the concave portion, and a surface facing the curved bottom is formed in a convex shape at the connection portion, and the curved bottom is supported via the convex surface at the connection portion when the bottom is displaced. West,
A bottom structure for a bed, wherein the curved bottom and the convex surface at the connection point are in contact with a maximum contact area at the time of the maximum displacement of the bottom. 2. A bed provided with a mechanism for raising and lowering a bottom, wherein a first connecting member and a second connecting member are provided so as to protrude from one side of an adjacent bottom among the plurality of divided bottoms. , The first connecting member and the second
The two bottoms are rotatably connected via a connecting member, and a curved bottom is placed on the projecting portions of the first and second connecting members of the bottoms, and the connecting portions of the first and second connecting members are connected. Each of the first and second connecting members has a shape that bends in a direction away from the curved bottom, and an auxiliary member that contacts the curved bottom and supports the curved bottom is bridged between the first and second connecting members when the bottom is flat. The auxiliary member is movably connected to one of the first and second connecting members, and a surface of the first and second connecting members facing the curved bottom is formed in a convex shape to form a bottom surface. At the time of displacement, the curved bottom is supported via the convex surface and the auxiliary member at this connection point, and at the time of the maximum displacement of the bottom,
A bottom structure in a bed, wherein a curved bottom, a convex surface of the first and second connecting members, and an auxiliary member are in contact with a maximum contact area.