JPS60194950A - Beads flow type bed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains]

This invention aims to prevent bedsores in patients lying on a bed, and the upper surface of the box-shaped bed tank is filled with fine beads as solid particles to reduce the contact pressure between the patient and the bed. This invention relates to an improvement of a bead fluidized bed in which a bed is covered with a sheet and compressed air is blown into the bed tank from below to fluidize the beads and support a patient in a floating state.

[Prior art and its problems]

First, the structure and operation of a conventional head of this type will be described with reference to FIG. In the figure, 1 indicates a head, and 2 indicates a patient lying on a bed. The head 1 includes a box-shaped bed tank 3 that is large enough for a patient 2 to lie down on, and a bed with a specific gravity of 2 to 2, which is made by coating the surface of fine particles of glass, for example, filled in the head tank 3 with a resin.
31 ceramic beads 4 with a particle size of about 50 to 150μ,
A filter sheet 5 with air permeability having a particle diameter smaller than that of the beads 4 placed over the top surface of the bed tank 3 and fixed to the periphery of the head tank 3, and a plenum chamber 6 provided on the bottom side of the bed tank 3. , a porous air diffusion plate 7 interposed at the boundary between the plenum room 6 and the bed tank 3, and an air blower housed in a machine room 8 that also serves as the base of the bed. It is composed of a combination of 9 etc. Note that 10 is a sheet pressing fitting that fixes the filter sheet 5 to the periphery of the bed tub 1. In such a configuration, when the air blower 9 is stopped, 4;t
He-X 4 is in quiescent state, patient 2 lying on the bed.
gives the feeling of sleeping on sand. When the air blower 9 is operated from this stopped state and compressed air is blown into the head tank 3 from below in the direction of the arrow through the plenum chamber 6 and the air diffusion plate 7, the compressed air reaches every corner of the bed tank. During this time, the beads 4 confined within the tank by the filter sheet 5 are fluidized by the compressed air flow and form a floating state. In this state, the apparent specific gravity of the beads 4 decreases to about 1.1 to 1.2, and the patient lying on them is supported in a floating state. In such a state, the contact pressure applied to the patient's 2 body becomes extremely small, and the patient feels as if he or she is floating in the air. Note that the compressed air is continuously forced in, and the air that has passed through the bed tank is transmitted through the sheets 5 and diffused into the room. Such a head-throttle device can be used as a medical bed, for example, for patients with burns, by reducing the contact pressure to the affected area, thereby increasing the therapeutic effect, and for patients undergoing long-term treatment, it can be used as a head and throat device. Effects such as being able to prevent bedsores by reducing the contact pressure can be obtained. By the way, as mentioned above, the filter sheet 5 that covers the top surface of the head tank in the throat is generally a breathable filter sheet 5, so the body fluids of the patient 20 lying on the head or the lost M fluid, etc. do not pass through the filter sheet 5. The particles penetrate into the beads 4 in the bead bath and contaminate the beads. As a result, during long-term use, the beads not only bind to each other and have an adverse effect on fluidity, but also cause problems such as bacteria propagation within the beads and the resulting unpleasant odor. For this reason, in the past, the beads 4 have been periodically sterilized, washed, or replaced with new ones to maintain hygiene, but this work requires a lot of effort and cost. In addition, the air blown into the bead tank is filtered using a filter sheet 5.
Since the air passes through the air and blows out upwards, there is a risk that it may shine directly on the patient 2 lying on the bed and cause discomfort. Therefore, it is necessary to adjust the temperature so that the compressed air blown into the premises from the blower 9 is at an appropriate temperature. It was.

[Purpose of the invention]

The present invention has been made in view of the above points, and its purpose is to provide a bead flow system capable of eliminating the above-mentioned drawbacks of conventional beds.

[Key points of the invention]

In order to achieve the second object, this invention has a sheet placed over the top of the head tank, with a small amount (at least the top side is made of a flexible liquid-impermeable sheet such as a vinyl sheet or a rubber sheet). While using sheets to prevent body fluids and incontinence fluids from penetrating into the beads in the tank, on the other hand, an exhaust hole is opened in the upper circumferential surface of the bed tank, and the air blown into the tank is passed through this exhaust port to the head. The air is vented to the side to prevent wind from directly hitting the patient.

[Embodiment of the Invention] Figures 2 to 4 show examples of the present invention. The exhaust holes IJ are dispersedly opened. On the other hand, the sheet 12 placed over the top of the head 4W3 is
The upper surface side is a flexible liquid-impermeable sheet J3 such as a vinyl sheet or a rubber sheet, and the back side of the sheet is overlapped and adhered to a flexible breathable sheet 77). Composite structure sheets with J4 are used. The breathable mat 14 is made of felt or open-cell foamed resin foam, and is selected to have a large mesh so that the beads 4 do not pass through. Furthermore, as in the embodiment shown in FIG. 4, the lower surface of the breathable mat 14 is covered with a fine-mesh filter sheet 15 that does not allow beads to pass through, so that the mesh size of the breathable mat 14 can be adjusted freely. You can choose. According to the above configuration, the air blown into the bed tank during operation rises in the tank as indicated by arrow A'', fluidizes the beads 4, flows through the layer of the breathable mantle 14, and flows into the bed tank. The air is exhausted to the outside through an exhaust hole 11 opened in the upper circumferential surface of the air. This prevents the exhaust air from blowing directly onto the patient 2, unlike in the past, and the breathable mat 14
serves as a heat insulator and a cushioning material for the patient 2, providing a sense of comfort. Furthermore, since the breathable mantle 14 itself secures an air flow path in the upper part of the tank, the fluidity of the beads 4 is not impaired in the slightest. On the other hand, sheet 12
Since the upper surface of is made of a liquid-impermeable sheet 13,
Patient 2's body fluids, incontinence fluids, etc. pass through the sheet 12 and become IF.
There is no risk of penetrating the beads, and contamination of the beads with bodily fluids or the like is prevented. Effects of the Invention As described above, according to the present invention, beads are filled in a head tank whose top surface is covered with a filter sheet, and compressed air is blown into the tank from below to fluidize the beads. In a beaded fluidized bed that supports a patient lying on the bed in a floating state, the sheet is made of a flexible liquid-impermeable sheet at least on the upper surface side, and the upper peripheral surface of the head tank is By opening the exhaust hole, the body fluids of a patient lying on the bed will not penetrate and contaminate the beads in the head tank, and hygiene management of the head can be significantly improved compared to conventional systems. Moreover, the air blown into the bed tank is blown out to the side of the bed tank and does not directly hit the patient.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are sectional views of the structure of a bead flow type head according to a conventional method and an embodiment of the present invention, respectively, ff13.
4 and 4 are partially enlarged cross-sectional views of different embodiments of the sheet in FIG. 2, respectively. 2-patient, 3-head tank, 4-beads, 9-blower, 1
1...Exhaust hole, 12--Sheets, I3-Liquid impermeability

Claims (1)

[Claims] l) Beads are filled in a bed tank whose top surface is covered with a filter sheet, and compressed air is blown downward into the tank to fluidize the beads and place a patient lying on the bed -g1
In the bead fluidized bed supported in a floating state, a sheet made of a liquid-impermeable sheet with at least the upper surface side flexible is used as the filter sheet, and exhaust holes are opened in the upper peripheral surface of the bed tank. A bead flow type head characterized by: 2. In the bead flow type head according to claim 1, the sheet is made of flexible breathable pine I with sufficient thickness on the back side of the flexible liquid-impermeable sheet I.
・A bead fluidized bed characterized by being made by stacking and matching the above. 3) A bead fluidized bed according to claim 2, characterized in that the lower surface of the breathable mat is covered with an air permeable filter sheet that does not allow beads to pass through.