JPH0340273Y2 - - Google Patents

Description

[Detailed description of the device] [Field of industrial application] The present invention provides fine solid particles that can be effectively used, for example, in hospitals to treat burn patients and other critically ill patients, or in general households to put bedridden patients to sleep. This relates to the airbed used.

[Prior art] Airbeds using this type of fine solid particles are disclosed in, for example, Japanese Patent Application Laid-open No. 128196/1982 and Japanese Utility Model Application No. 1983-128-1.
It is known from the publication No. 108832. That is, this airbed has an air chamber below the particle chamber containing fine solid particles via a ventilation plate, and the compressed air, which has been dried at an appropriate temperature and is supplied from the power section to this air chamber, is passed through the porous bed. Fluidize the fine solid particles by flowing them into the particle chamber through the ventilation plate,
Due to the flow action and the air jet action from the filter sheet provided on the fine solid particles, the patient sleeping on the filter sheet is supported in a somewhat buoyant state. This airbed has the excellent effect of equalizing the contact pressure applied to the patient, relieving the patient's pain, and increasing the therapeutic effect, and has recently begun to be used in hospitals and the like mainly for burn patients. In this type of air bed, in order to equalize the contact pressure applied to the patient, it is required to equalize the flow state of the fine solid particles as much as possible, and to do this, the pressure distribution state of the compressed air in the air chamber must be made uniform. It is necessary to do so.

However, in conventional airbeds, the pressure distribution of compressed air tends to differ between the air inlet in the air chamber and other parts, especially the surrounding areas of the room, resulting in variations in the flow state of fine solid particles. There is. Further, the height of the air chamber needs to be a certain size in order to make the distribution of compressed air uniform, and there is a problem in that the height of the bed must be increased accordingly. This height of the bed places a heavy burden on nurses when moving patients, and nurses often work while climbing on top of the bed, and in such cases, concentrated gravity is applied to the ventilation plate. Accidents such as cracking or breaking of the ventilation plate are also likely to occur.

[Purpose of the invention] In order to improve the above-mentioned problems, the present invention can equalize the pressure distribution state of compressed air in the air chamber, reduce the height of the air chamber, and improve the mechanical strength of the ventilation plate. An object of the present invention is to provide an air bed using fine solid particles that can be expanded.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
In the airbed, which flows the fine solid particles by diffusing and inflowing compressed air from the air chamber below through the ventilation plate into the particle chamber containing the fine solid particles, an appropriate number of air discharge portions are provided in the lateral direction. A duct with a duct is disposed in the air chamber, and compressed air supplied to the duct in the air chamber is distributed from the air discharge part into the air chamber through the duct, and the upper surface of the duct is connected to the ventilation plate. This is an airbed using fine solid particles, which is characterized by supporting the lower surface.

[Embodiments of the invention] The invention will be described in detail based on illustrated embodiments.

The illustrated embodiment shows a case in which the present invention is applied to a separate air bed in which a power unit that supplies compressed air and a bed unit on which a patient is placed are separated, and the power unit is omitted in Fig. 1. Only the bed portion is shown. However, it goes without saying that the present invention can also be applied to a general air bed in which the power section is physically incorporated below the bed section.

In FIGS. 1 and 2, an air chamber 4 is provided below a particle chamber 2 containing fine solid particles 1 through a ventilation plate 3, and the temperature of the air chamber 4 is appropriately controlled from a power unit. When dry compressed air is supplied through the air hose 5, this compressed air diffuses into the particle chamber 2 through the ventilation plate 3, blows up the fine solid particles 1, and fluidizes them. 1
A sleeping patient P is supported on the layer with a filter sheet 6 interposed therebetween in a somewhat floating state.

In the present invention, a duct 7 is provided inside the air chamber 4 to regulate the flow of compressed air. The duct 7 is, for example, as illustrated in FIGS. 3a and 3b,
It has an approximately U-shaped cross-sectional shape, and both sides 7a,
7b is provided with an appropriate number of ventilation holes 8, and both ends 7c and 7d may be closed or open. Furthermore, both sides 7a of the duct,
7b may not have a ventilation hole 8 and only both ends 7c, 7d or one end 7c or 7d may be open. The duct 7 is arranged along the longitudinal direction of the air chamber 4, that is, along the longitudinal direction of the bed, and at a position straddling the air inlet 9. The compressed air entering from the air inlet 9 passes through the inside of the duct 7. Vent hole 8
Alternatively, it is discharged laterally from the open ends 7c and 7d and distributed into the air chamber 4. Furthermore, the upper side 7e of the duct 7 is in contact with the lower surface of the ventilation plate 3, and also serves as a support for the ventilation plate 3. In addition, when the duct 7 is in contact with the ventilation plate 3 in this way, the cross-sectional shape of the duct 7 is not necessarily U-shaped, and two plates may be arranged in parallel.

The optimal ventilation holes 8, etc. of the duct 7 have been found through numerous experiments, and the structures shown in FIGS. 4 to 8 are also effective. For example, partition plates 10 for guiding air flow may be arranged in parallel on both sides of the duct 7 as illustrated in FIGS. 4 to 8, or if necessary, as illustrated in FIGS. Additionally, a shielding wall 11 may be appropriately arranged between the partition plate 10 and the duct 7 or between the partition plate 10 and the side wall of the air chamber 4.

The partition plate 10 may be provided with ventilation holes at appropriate positions, or the lower surface of the ventilation plate 3 may be supported by the upper surface of the partition plate 10, similar to the duct 7.
The shape of the duct 7 can also be modified in various ways, such as by suitably bending it, or by providing a branch pipe or branch path.

FIG. 4 shows an example using a duct 7 in which ventilation holes 8 are concentrated only in the center, as shown in FIG. 3b, and arrows indicate air flow. Also, the fifth
The figure shows an example in which a duct 7 is used that does not have ventilation holes 8 on both sides 7a and 7b, and has only an open end 7d, and a shielding wall 11 is provided between the open end 7d and a partition plate 10. ing. Figures 6 and 7 show both sides 7
FIG. 8 shows an example in which a duct 7 having ventilation holes 8 only in the central portions a and 7b is used, and a short duct 7 with openings at both ends.

The shape and arrangement of these ducts 7, partition plates 10, shielding walls 11, the positions and number of ventilation holes 8, etc.
By appropriately selecting the size and shape of the air chamber 4, the pressure distribution state of the compressed air within the air chamber 4 can be arbitrarily adjusted. For example, it is of course possible to equalize the pressure distribution within the air chamber 4, but it is also possible to make the pressure at a specific location stronger or weaker to control the flow of the fine solid particles 1 toward the patient. It is also possible to change the state to the optimum state.

[Effects of the invention] As explained above, the air bed using fine solid particles according to the present invention can equalize the pressure distribution of compressed air introduced into the air chamber, so that the flow of fine solid particles can be applied to the patient. It can be set to the optimum condition. Furthermore, there is no need to make the height of the air chamber very high, and even if the height of the conventional device is reduced from about 125 mm to about 50 mm, the same function as the conventional device can be maintained. Moreover, since the ventilation plate is supported by the duct, partition plate, etc. and becomes a strong reinforcing body, there is no risk of the ventilation plate cracking or breaking even if a large load is applied to the bed. In addition, since the thickness of the ventilation plate can be made thinner than before,
It is also possible to improve the ventilation of the ventilation plate.

[Brief explanation of drawings]

The drawings show an embodiment of the air bed using fine solid particles according to the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the bed portion, Fig. 2 is a cross-sectional view of the air chamber portion, and Fig. 3 a, b is a perspective view of an example of the shape of the duct, and FIGS. 4 to 8 are plan views of examples of arrangement of the duct, partition plates, etc. 1 is a fine solid particle, 2 is a particle chamber, 3 is a ventilation plate, 4 is an air chamber, 5 is an air hose, 6 is a filter sheet, 7 is a duct, 8 is a ventilation hole, 9 is an air inlet, 10 is a partition The plate 11 is a shielding wall.

Claims (1)

[Claims for Utility Model Registration] 1. An airbed in which fine solid particles are made to flow by diffusing and inflowing compressed air from an air chamber below the particle chamber through a ventilation plate into a particle chamber containing fine solid particles. a duct having a suitable number of air discharge parts in the direction is arranged in the air chamber, and compressed air supplied to the duct in the air chamber is distributed from the air discharge part to the air chamber through the duct; An air bed using fine solid particles, characterized in that the upper surface of the duct supports the lower surface of the ventilation plate. 2. An air bed using fine solid particles according to claim 1, wherein the air discharge portion is a vent provided on the side surface of the duct. 3. An air bed using fine solid particles according to claim 1, wherein the air discharge part is an opening in the end face of a duct. 4. An air bed using fine solid particles according to claim 1, wherein partition plates for regulating the flow of compressed air are arranged on both sides of the duct.