JP2000024053A - Medical bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change support positions for patients without disturbing his/her quiet. SOLUTION: Multiple support rods 5 constituting a mat body 3 are divided into the first group of support rods in odd numbers and the second group support rods in even numbers. Each group of support rods is driven by a drive mechanism so that all support rods 5 of the first group and all support rods 5 of the second group move up and down between the top dead center and the bottom dead center in turn, and either of the first and second groups is always at the top dead center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical bed having a function of preventing bedsores in a sick person.

[0002]

2. Description of the Related Art When a bedridden sick person who has limited freedom of body is lying on a bed for a long time in the same posture, blood circulation at a contact portion between the body and the bed surface is deteriorated and bedsore occurs. In order to prevent this bedsore, for example, an air mat is formed by a plurality of cylindrical air enclosing chambers formed by enclosing air in a bag body, and the air mat is divided into a first system air enclosing chamber and a second system air enclosing chamber. Air is supplied to the air-filled chambers of each system, and the air-filled chambers of each system are alternately expanded and contracted alternately. An air mat has been proposed in which the position of supporting a lying person is alternately supported by a room to change the position of supporting the lying person.

[0003]

In the above-mentioned air mat, even if the air-filled chamber of each system expands and contracts, each air-filled chamber is elastically compressed and deformed by the weight of the lying person and receives a compressive load. Since the height of the air-filled chamber is reduced, the height difference between the air-filled chambers of both systems is reduced, and there is a problem that the effect of changing the position for supporting the lying person cannot be sufficiently exhibited.
Further, in a conventional air mat, water bed, or the like, since the body shifts and moves in a state of moving when approaching or separating from the air mat or the water bed, there is a problem that seasickness occurs. It is an object of the present invention to enhance the effect of preventing bedsores by appropriately switching the position for receiving the body without impairing the resting state of a sick person lying on a bed.

[0004]

According to a first aspect of the present invention, there is provided a bed main body comprising a first group of supporting rods and a second group of supporting rods having a plurality of supporting rods having a property of being hardly compressed and deformed. And a support rod group of the first group and a support rod group of the second group are formed in the vicinity of the main mat body. Ascending and descending repeatedly with the phase between the top dead center and the bottom dead center being shifted, the support rod group of any one of the first group and the second group is constantly displaced to the top dead center. As described above, a drive mechanism for driving the support rod group for each group is provided.

According to the first aspect of the present invention, when a plurality of support rods having the property of being hardly deformed by compression and forming a mat body are driven by the drive mechanism, the first group of support rods and the second group of support rods are driven. The support rod group is repeatedly raised and lowered in a state where the phases are shifted between the top dead center and the bottom dead center for each group, and the body on the bed body is moved by the support rod group of the first group and the support rod group of the second group. The receiving mode in which the body is alternately received and received by the support rod group is switched over time. Further, when the support rod group is driven, the support rod group of one of the first group and the second group is constantly displaced to the top dead center, and the body is always received by one of the support rod groups.

According to a second aspect of the present invention, in the medical bed according to the first aspect, a plurality of receiving surfaces are formed on the upper surface of each of the support rods, the receiving surfaces being arranged in the longitudinal direction of the support bar with respective recesses. The support rods are configured to move in a combination of the movement in the longitudinal direction and the elevating operation so that the receiving surfaces are displaced to the top dead center at a plurality of positions separated in the longitudinal direction of the support rod. It is characterized by having done.

According to the second aspect of the present invention, when the support rod group is driven, each of the support rods of the first group and the second group repeats the movement combining the movement in the longitudinal direction and the elevating operation, A plurality of receiving surfaces formed on the upper surface of each support rod and arranged in the longitudinal direction of the support rod are displaced to a top dead center at a plurality of positions separated in the longitudinal direction of the support rod, and each receiving surface of each support rod is displaced. Thereby, the receiving position for receiving the body on the bed body is switched to a plurality of positions separated in the longitudinal direction for each support rod of each group.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS. In a medical bed installed in a hospital room or the like, a bed body 1 installed on a support portion of a bed frame has a rectangular frame-shaped edge frame installed on a peripheral portion of a bottom plate 4 laid horizontally on a lower end thereof. 2
And a mat body 3 installed on the bottom plate 4 while being fitted inside the edge frame body 2.

The edge frame 2 of the bed body 1 is formed in a structure in which, for example, an elastic pad is covered with a skin material such as cloth or leather.

The mat body 3 of the bed body 1 is such that, of the average human body lying on the bed body 1, the body part from the shoulder to the foot excluding the part above the shoulder is received by the mat body 3. It is formed in a suitable length.

The mat members 3 each have a property of being relatively hard and not easily deformed by compression, and are arranged in a row in the longitudinal direction of the bed body 1 (height direction of the human body on the bed body 1). The support rod 5 is formed by an elongated support rod 5. In this embodiment, the support rod 5 has a thickness of about 10 to 20 mm,
Square bars having a length of 600 to 800 mm and a vertically long rectangular cross section are used.

Each support bar 5 is made of, for example, a plastic square bar material having a corrugated cardboard structure or a honeycomb structure in which a corrugated sheet is sandwiched between a front sheet and a back sheet, or a light metal such as aluminum. The support bar 5 is formed of a square bar or the like, and the upper end surface of each support bar 5 is covered with a skin material such as cloth or leather as necessary. Further, the mat body 3 is provided with a cover such as a cloth covering the support rod group as necessary.

All the supporting rods 5 constituting the mat body 3 are composed of a first group of supporting rod groups arranged in an odd number every other, and 1
Every other is divided into an even-numbered second group of support rod groups.

Each of the support rods 5 of the first group and each of the support rods 5 of the second group have a state in which the body lying on the bed body 1 is received by the group of support rods in the first group, and a state in which the body is in the second group. The body is received by the support rods of the first group and the body is
The driving mechanism is driven by the driving mechanism for each of the groups to change the top dead center and the bottom dead center to the state of being received by all the supporting rods 5 with the group of supporting rods with the lapse of time so as to prevent bedsores. Are repeatedly moved up and down with the phase shifted.

In a drive mechanism for driving all the support rods 5 of both groups separately for each group, a pair of first drive shafts 7 for driving all the support rods 5 of the first group simultaneously on the bottom plate 4 of the bed body 1. And a pair of first second drive shafts 8 for simultaneously driving all the support rods 5 of the second group are horizontally laid in parallel along the longitudinal direction of the bed body 1, and the two first drive shafts 7
The start switch is turned on and the second drive shaft 8 is turned on.
The rotation of the motor 9 that rotates and stops when it is turned off is transmitted via a transmission member such as a pulley or a timing belt, and the drive shafts 7 and 8 are synchronously driven to rotate.

The first drive shafts 7 are respectively installed opposite to a plurality of passive support rods 5 of the first group of support rod groups, and the first group of support rod groups are simultaneously moved up and down. A plurality of pairs of first cams 10 are fixed.

Each of the second drive shafts 8 is installed so as to face a plurality of passive support rods 5 of the second group of support rod groups, and simultaneously moves the second group of support rod groups up and down. A plurality of pairs of second cams 11 are fixed.

All the support rods 5 of the first group are connected to a pair of left and right first through holes 14 penetrating near the left and right ends of the support rods 5 of the first group so as to be able to move together. The first connection shafts 12 are respectively inserted.

The pair of left and right support rods 5 of the second group are connected to each other in a pair of left and right second through holes 15 formed near the left and right ends of the respective support rods 5 of the second group so as to be able to move together. The second connecting shafts 13 are respectively inserted.

Each of the second connecting shafts 13 is loosely inserted into each of the supporting rods 5 of the first group with a gap therebetween so that each of the supporting rods 5 moves up and down without being hindered by the second connecting shaft 13. A pair of vertically long relief holes 16 are respectively provided.

Each of the first connecting shafts 12 is loosely inserted into the supporting rods 5 of the second group with a gap therebetween so that the supporting rods 5 move up and down without being hindered by the first connecting shafts 12. A first pair of vertically long relief holes 17 are respectively provided.

A suitable number of passive support rods 5 of the first group of support rod groups are respectively mounted on a pair of first cams 10, and the second group of support rod groups of the second group. Each of the appropriate number of passive support rods 5 is a pair of second cams 1.
It is installed on 1

When each pair of first cams 10 rotates, each passive support rod 5 on each pair of first cams 10 is connected to both first connecting shafts 1.
2 and all the support rods 5 of the first group are moved up and down at the same time by the elevating operation of the two first connecting shafts 12.

When each pair of second cams 11 rotates, each of the passive support rods 5 on each pair of second cams 11
3 and all the support rods 5 of the second group are moved up and down at the same time by the elevating operation of the second connecting shaft 13.

On the bottom plate 4 of the bed body 1, the bottom plate 4
And four corners of the mat body 3 that vibrate the mat body 3 between the corners of the mat body 3. When a switch for the vibrating body is turned on, the vibrating body operates and the mat body 3 is turned on.
Can be vibrated. Alternatively, air may be blown out onto the bed body 1 from various places on the bed surface.

For example, as shown in FIG. 5, the support rod group of the first group and the support rod group of the second group are shifted from the top dead center to the bottom dead center by a phase shift of about 90 °. Ascending and descending at a rate of once every three minutes, the supporting rod group of one of the supporting rod groups of the first group and the second group is constantly displaced to the top dead center. The support mechanism is driven by the drive mechanism in a state where the period when the support rod group of the second group rises to the top dead center and the time when the support rod group of the second group rises to the top dead center slightly overlap.

Accordingly, the body on the mat body 3 is
When the body is received by all the support rods 5, the body is received by each support rod 5 of the first group, and the body is received by each support rod 5 of the second group. Can always be switched.

Therefore, when each support rod 5 is driven, the body is always received by one or both of the first group of support rods and the second group of support rods.

According to the above-described embodiment, the first group of support rods and the second
Since the support rod groups of the groups are alternately displaced to the top dead center, the height at which the body on the bed body 1 is received by the two groups of support rod groups is reliably switched to receive the body weight. By properly repeating the state in which the support rods are in close contact with the body and the state in which the support rods are separated from the body, the body's blood circulation is improved, depressed blood is eliminated, and the occurrence of bedsores is effected Can be prevented.

The first group of support rods and the second group of support rods
Since one of the support rods of the group is constantly displaced to the top dead center, it is possible to eliminate the problem that the position of supporting the body suddenly changes and the resting state of the lying body is impaired, and Since the body does not move when it comes into contact with or separates from the support rod group of each group, it is possible to eliminate seasickness phenomena caused by the body moving in the case of conventional air mats and water beds, etc. It is possible to switch the receiving position of the body while maintaining a resting state.

Next, a second embodiment of the present invention shown in FIG. 6 will be described. Each of the support rods 21 of the mat body 20 includes a first group of support rod groups and a first support rod group alternately arranged in the longitudinal direction of the bed. The support rods are divided into two groups, and are driven collectively for each group.

On the upper surfaces of the support rods 21 of the first group and the second group, a slightly recessed portion 26 is separated from each other by a longitudinal direction (width direction of the bed body).
A plurality of receiving surfaces 25 are arranged at regular intervals to receive each part of the body on the bed body at a plurality of positions separated in the width direction of the bed. In this embodiment, a plurality of receiving surfaces 25 are formed.
5 has a concave shape 26 having a substantially square planar shape and a length 26
Is set to be equal to the length of

On the lower surface of each support rod 21 of each group, there are formed cam surfaces 27 in which a plurality of convex portions 27a and concave portions 27b are alternately arranged in the longitudinal direction.
In this embodiment, 7 is set such that when the arrangement pitch of the receiving surfaces 25 is P, the arrangement pitch of the convex portions 27a and the concave portions 27b is ＰP.

On the bottom plate 22 of the bed body, a first driving mechanism such as an air cylinder for controlling the movement of all the support rods 21 of the first group in the longitudinal direction at once, and all the support rods 21 of the second group at one time. And a second drive mechanism such as an air cylinder that controls movement in the longitudinal direction.

The support rod group includes all the support rods 21 of the first group.
And the state in which all the support rods 21 of the second group are both moved to one moving end, and the state in which all the support rods 21 of the first group and all the support rods 21 of the second group are both moved to the other movable end. A state in which all the support rods 21 of the first group have moved to one moving end and all the support rods 21 of the second group have moved to the other moving end; The first drive mechanism and the second drive mechanism control the drive in four states, that is, the state where the support rods 21 of the second group are moved to the one movable end by moving to the movable end of the second group.

On the bottom plate 22 of the bed body, there are provided rotatably supported balls 28a, and a plurality of rollers 28 arranged in a row in a row along the support rod 21.
A large number of sets of roller rows are provided so as to face each support rod 21.

Each roller row is arranged in the longitudinal direction of the bed in accordance with the arrangement interval of the support rod group, and each support rod 21 is arranged in a state where the cam surface 27 is in contact with the balls 28a of the plurality of rollers 28. When the support rod 21 is placed on the top and moves in the longitudinal direction, the support rod 21 is guided by the rollers 28 and moves up and down according to the shape of the cam surface 27.

When all the support rods 21 of the first group and all the support rods 21 of the second group are driven in groups by the first drive mechanism and the second drive mechanism and move in the width direction of the bed, each support rod of each group is moved. Each of the groups 21 performs a combined movement of the movement in the longitudinal direction and the elevating operation for each group, and each receiving surface 25 of the first group of supporting rods and each receiving surface 25 of the second group of supporting rods. Each receiving surface 2 of all the support rods 21 of the first group displaced to the top dead center at two positions separated in the width direction of the bed and displaced to the top dead center, respectively.
The arrangement of each receiving surface 25 of all the supporting rods 21 of the fifth and second groups is switched in four ways, and the receiving mode of receiving the body on the bed body by the supporting rod group is switched in four ways.

In the above-described embodiment, the shape of the cam surface 27 of each support rod 21 is set such that the support rod 21 rises to the top dead center at n positions by moving the support rod 21 in the longitudinal direction. When the 25 is displaced to the top dead center at a plurality of n positions separated in the width direction of the bed, the receiving mode of receiving the body on the bed body by the two support rod groups is switched in 2 × n ways. .

The distance by which each support rod 21 is moved in the longitudinal direction may be switched by a drive mechanism.

The distribution of the pressure applied to the main mat body by each part of the body lying on the bed body is individually detected, and the shape of the support rod is adjusted by a computer so that each support rod has a shape suitable for each body. It may be designed individually.

According to the above-described second embodiment, the arrangement of the receiving position for receiving the body on the bed body by the support rod group can be switched in multiple stages, so that the receiving mode for receiving the body is diversified and the beds The prevention effect can be enhanced.

[0043]

According to the first aspect of the present invention, the first group of supporting rods and the second group of supporting rods, which are hardly compressed and deformed, are alternately displaced to the top dead center. The position at which the body on the bed is received by the two groups of support rods can be reliably switched so that the height at which the body is received varies with weight, and the support rods can be in close contact with the body. By properly repeating the state of being separated from the body, the blood circulation of the body can be improved to eliminate depressed blood, and the occurrence of bedsore can be effectively prevented.

The first group of support rods and the second group
Since any one of the group of support rods is constantly displaced to the top dead center, it is possible to eliminate the problem that the position of supporting the body suddenly changes and the resting state of the lying body is impaired, and The body does not move when it comes into contact with or separates from the support rod group of each group, so that seasickness phenomena caused by body movement in the case of conventional air mats, water beds, etc. can be eliminated. The rest position of the body can be ensured and the receiving position of the body can be switched.

According to the second aspect of the present invention, the arrangement of the receiving position for receiving the body on the bed body by the support rod group can be changed in multiple stages, so that the receiving mode for receiving the body is diversified and the bedsore prevention effect is obtained. Can be enhanced.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a plan view of a bed body.

FIG. 2 is an enlarged view taken on line X1-X1 of FIG. 1;

FIG. 3 is an enlarged view taken on line X2-X2 of FIG. 1;

FIG. 4 is an enlarged view taken along line X3-X3 in FIG. 1;

FIG. 5 is a time chart for explaining the movement of the support rod.

FIG. 6 shows a second embodiment of the present invention, and is a front view near a support rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bed main body 3 Mat body 5, 21 Support rod 25 Receiving surface 26 Depressed part

Claims (2)

[Claims] 1. A bed body comprising a plurality of elongated support rods having a property of being hardly compressed and deformed and divided into a first group of support rod groups and a second group of support rod groups arranged alternately. Form a mat body arranged in the longitudinal direction of the main body,
In the vicinity of the mat body, the support rod group of the first group and the support rod group of the second group are repeatedly moved up and down in a state where the phases are shifted between top dead center and bottom dead center. A medical bed provided with a drive mechanism for driving a group of support rods so that the group of support rods of one of the group and the second group is constantly displaced to the top dead center. 2. A plurality of receiving surfaces are formed on the upper surface of each of the support rods, each of which is arranged with a recess in the longitudinal direction, and each of the support rods moves in the longitudinal direction. 2. The medical bed according to claim 1, wherein the respective receiving surfaces are displaced to a top dead center at a plurality of positions separated in a longitudinal direction of the support rod by performing a movement in combination with an elevating operation.