JP2003304949A - Fluid feed drain valve for hollow mat and hollow mat using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrict the sharp deformation of cells even when intense forces are applied locally by decreasing the rate of the contraction of cells under a slow speed of discharging fluids from the cells when the fluids such as air are supplied alternately at each of systems and keep the dispersion of body pressures with a lower pressure by easing the contraction of the cells. <P>SOLUTION: A valve seat 16 and a valve 17 at the fluid feed drain valve A is molded integrally by an elastic synthetic resin or synthetic rubber molded product and the valve seat 16 and the valve 17 are partially linked with a thin film 18 so as to let the valve 17 be freely opened or closed relative to the valve seat 16 with a hinge thus formed. The valve seat 16 is made in a truncated cone. A lid 14 is fitted closely into a housing 13 and with the fitting, the valve seat 16 and the valve 17 are securely grasped between the lid 14 and the housing 13. Grooves are formed at four points along the outer circumferential surface of the truncated cone-shaped valve seat 16 as fine paths 20 for bleeding. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid supply / discharge valve for use in a hollow mat used in the care of a patient at home or in a hospital, and a hollow mat using the fluid supply / discharge valve A.

[0002]

2. Description of the Related Art Many types of air mats used in the care of patients at home and in hospitals have been developed and sold. Above all, in the air mat for the elderly who cannot change the position by himself, the patient who has just undergone surgery, and the severely disabled person, the air bag (air cell) ), Connect this to another air line system, supply air alternately to each air line system, and place the air mat that hits the user from time to time (for example, every 30 minutes to 2 hours). ) Change to prevent the occurrence of bedsores and suppress their progress. However, when the user is lying on the air mat, when the air is replaced in such an air cell, before the air is sufficiently supplied to the air cell group of the one system, the air cell of the other system is not supplied. When the air is released from the group, the air cells are rapidly collapsed, especially in the waist and buttocks where bed sores are likely to occur, so that a so-called flooring phenomenon inevitably occurs. In order to prevent this, a pressure sensor is provided in each system, and a complicated control system is provided to prevent the phenomenon of flooring.However, this does not mean that the pressure of each air cell is measured. Providing a pressure sensor in the air cell complicates the structure unnecessarily, obstructs the care work of the patient and the caregiver, and increases the cost of the air mat.

[0003]

DISCLOSURE OF THE INVENTION The object of the present invention is to achieve rapid shrinkage of cells which occurs when a local force is applied in the above-mentioned hollow mat for alternately supplying fluid such as air to each system. Since the ability to stably support the patient's body is lost, the draining speed of the fluid discharged from the cell is slowed, and the cell's ability to support is prevented from being lost by slowing the rate of contraction of the cell, and even when the mat is contracted. It is an object of the present invention to provide a mat fluid supply / discharge valve capable of ensuring a certain degree of patient support and a mat using the fluid supply / discharge valve to the market. It is a further object of the present invention that when the user is lying on the air mat, the fluid supply to and discharge from the cell can be performed without the flooring phenomenon without using a pressure sensor for the cell or a complicated control system. It is to provide the market with a hollow mat that can be properly performed.

[0004]

In order to solve the above-mentioned problems, the specific invention is a plurality of cells 10 in a hollow mat 10.
b is divided into at least two systems, is attached to each cell of each section, and in the fluid supply / discharge valve A for the hollow mat for alternately expanding and contracting the cells 10b group of each system,
The fluid supply / discharge valve A is a one-way quasi-flow control valve having a large opening degree when the fluid is injected into the cell 10b group of each system and expanding, and a small opening degree when the fluid is not supplied. The small flow passage is formed as a mat which is constituted by a relief narrow passage 20 provided in the valve seat 16 to the valve body portion 17 of the fluid supply / discharge valve A.

In order to solve the above problems, the fluid supply / discharge valve A has a short cylindrical housing 13 attached to the opening of the hollow mat 10, and a valve seat detachably fitted in the housing 13. 16 and a valve body 17, and a lid 14 with a fluid supply / discharge pipe 11 for supporting the valve seat 16 in the housing 13 and closing the outer end of the housing 13, the valve seat 16, the valve body portion 17 , The valve seat 16
At least one of the mating surfaces of the valve body portion 17 and the valve body portion 17 is provided with the relief narrow passage 20 through which the fluid in the hollow mat 10 can pass, and the lid 14 is detachable from the housing 13. The valve seat 16 to the valve body portion 17 are detachably provided from the housing 13 when the lid 14 is removed.

In order to solve the above-mentioned problems, the valve body 17 in the fluid supply / discharge valve A has a stem-like valve portion 17a and a shaft which penetrates a part of the valve seat 16 from the center of the valve portion 17a. With a leg portion 17b slidable in the direction of the valve seat 16
On the other hand, the leg portion 17b is inserted into the valve seat 16 from the hollow mat 10 side, and is provided so as to be displaceable by fluid pressure within a desired range in the axial direction of the valve body 17.

In order to solve the above-mentioned problems, the escape narrow passage 20 in the fluid supply / discharge valve A has the valve body 17
There is a case where it is provided in the central portion of the through the axis.

In order to solve the above-mentioned problems, the valve seat 16 and the valve body 17 in the fluid supply / discharge valve A are integrally formed by a synthetic resin or synthetic rubber molding having elasticity, and the valve seat 16 is formed. In some cases, the valve element 17 and the valve element 17 are connected to each other by a thin film and are hinged so that the valve element 17 can be opened and closed with respect to the valve seat 16.

In order to solve the above-mentioned problems, the valve seat 16 in the fluid supply / discharge valve A has a truncated cone shape, and the outer peripheral surface has a small diameter on the hollow mat 10 side and a large diameter on the lid 14 side. The lid 14 and the housing 13 are closely fitted to each other so that they can be assembled, and by this fitting, the valve seat 16 and the valve body 17 are sandwiched and fixed between the lid 14 and the housing 13. preferable.

In order to solve the above problems, a groove is formed as the escape narrow passage 20 at least at one location along the outer peripheral surface of the truncated cone-shaped valve seat 16 in the fluid supply / discharge valve A. There is also.

In order to solve the above-mentioned problems, a small hole is formed in the central portion of the valve body 17 in the fluid supply / discharge valve A as the escape narrow passage 20 so as to penetrate in the axial direction of the valve body 17. There are cases.

In order to solve the above-mentioned problems, the escape narrow passage 20 formed in the central portion of the valve body 17 in the fluid supply / discharge valve A has a second opening / closing for opening / closing the small hole at the lower end of the small hole. The valve 27 is connected to the valve body 17 by a second thin film and hinged to open to the fluid supply side, and the second on-off valve 27 is biased in a direction to be always closed by the elasticity of the second thin film. There is also.

In order to solve the above-mentioned problems, the inner surface of the lid 14 of the fluid supply / discharge valve A can be brought into close contact with the bottom surface side of the valve seat 16, and the fluid supply / discharge which penetrates the lid 14 between them. It is desirable that the flange portion of the pipe 11 can be tightly held.

In order to solve the above-mentioned problems, a pipe-shaped connection port 23 connected to the end of the fluid supply pipe 11 is provided at the center of the bottom of the lid 14 of the fluid supply / discharge valve A so as to project outward. Preferably.

In order to solve the above problems, the mat 1
The 0 fluid supply / discharge valve A is a molded product made entirely of elastic rubber or synthetic resin, and is preferably attached to the hollow mat 10 made of synthetic resin.

In order to solve the above problems, the related invention is
Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1
A hollow mat 10 comprising a cell provided with the fluid supply / discharge valve A for a mat according to 1 or 12.

In order to solve the above-mentioned problems, among the cells 10b of the hollow mat 10, at least the cell group located at a site where the user is apt to have a bed slip can be attached to and detached from the base sheet of the hollow mat 10 by a fixing means. It is desirable that it is attached.

The operation of the invention is constructed as described above. The operation of the invention described in any one of claims 1 to 12 is described in claim 13.
The use of the invention described in claims 14 to 14 will be described below. The hollow mat 10 will be described as an air mat. Therefore, each cell 10b will be described below as an air cell 10b. A predetermined number of air cells 10b are arranged on the flat base sheet 10a of the hollow mat 10 in the transverse direction thereof, and are alternately attached to each other by alternately adjoining each other by 180 degrees, and are detachably attached by attaching means such as male and female hooks. The air cell 10 is connected to a fluid supply / discharge pipe 11 arranged along the side edge of the base sheet 10a for each series through a connecting means.
Connect the air chambers of group b. Next, the two air supply tubes 11 arranged along the side edge are connected to the common air supply source 2
5 (see FIG. 1).

When it is desired to change the posture of a patient such as a bedridden elderly person or a user by using the hollow mat 10 assembled and formed in this way, for example, one air supply pipe from a common air supply source 25. 11, air is supplied, the fluid supply / discharge valve A is opened, and the air cell 1 of each system is
When air is alternately supplied to the opposite system every two hours, for example, for each system in the 0b group, the air cell 10b of one system swells first. The fluid is gradually exhausted from the air cells 10b of the other system through the escape narrow passage 20 of the fluid supply / discharge valve A, and contracts to a flat shape due to the external pressure. At this time, due to the exhaust from the escape narrow passage 20, the exhaust amount of the fluid is significantly smaller than the supply amount thereof, the entire amount is not exhausted at once, and the air cell 10b of the other system is not completely flat, It maintains an expanded state to some extent and contracts in a form that can support the patient. In this way, the air cell 10b of one system is completely expanded, and the air cell 1 of the other system is expanded.
The patient is supported by the hollow mat 10 with the supporting force of 0b reduced. At this time, since the patient is supported by the air cell group 10b of the completely expanded system, almost no external pressure acts on the air cell group 10b of the other system, and the air cell group 10b of the other system expands to some extent. It can be maintained in the open state (see FIG. 17).

Next, the air in one of the systems to which air was supplied last time is exhausted from the air chamber of the air cell group 10b, and the air is supplied to the air chamber of the air cell group 10b group in the other system in the same manner as the previous time. The two series of air cells 10b swell into a thickness shape that is opposite to the previous one (see FIG. 18). By repeating such an operation and inflating and contracting the two groups of air cells 10b alternately, the position where the patient, user on the hollow mat 10 contacts the group of air cells 10b is changed or turned over.

When the air cells 10b of each system are tapered, when air is supplied to both air systems, all the air chambers of the air cells 10b group in all the hollow mats 10 swell, As a whole, both sides of the hollow mat 10 are thick, and the central part swells slightly thin from the bedside to the feet. Especially, the lumbar region where bed sores are likely to occur,
The air cells 10b in the buttocks and the heel contact area do not contract rapidly prior to the other areas, so-called bottoming phenomenon does not occur, the patient is not injured, and the care work is reduced. When any air cell is damaged during the use and air leakage occurs, the supply of the pressurized air to the air cells 10b group of the system is stopped, and only the damaged air cell 10b is removed from the base sheet 10a. Replace with and reuse. Further, when the fluid supply / discharge valve A is damaged, the lid 14 of the fluid supply / discharge valve A is removed from the housing 13, and a damaged part such as the valve seat 16 or the cap-shaped valve body 17 is removed. Replace with a new one.

Particularly, in the fluid supply / discharge valve A according to the present invention as defined in claims 3 and 11, the fluid supply / discharge pipe 11 connected to the valve A is opened to the atmosphere or, in the case of liquid, on the liquid recovery tank (not shown) side. When the fluid is released from the air cell 10b of the other system, the valve body 17 in the form of a cap is lowered based on the fluid pressure that accompanies the weight of the patient applied to the air cell 10b of the other system, and is brought into close contact with the valve seat 16. Then, the fluid supply / discharge valve A is closed, and the air cell 1 of another system is passed only through the relief narrow passage 20 provided at the center of the valve body 17 in the shape of a looper penetrating this axis.
The fluid is squeezed from 0b and the flow rate is limited, and the fluid is gradually exhausted from the air cells 10b of the other systems. As a result, the exhaust amount of the fluid is significantly smaller than the supply amount, and the entire amount is exhausted at one time. However, the air cell 10b of this system is not completely flattened and is maintained in an expanded state to some extent,
Contracts in a form that can support the patient. Further, when the fluid supply / discharge valve A is damaged, the fluid supply / discharge valve A is removed from the fluid supply pipe 11 and the hollow mat 10 and the damaged part, for example, the valve seat 16 or the cap-like shape. Disc 1
Replace 7 with a new one. Particularly, in the invention according to claim 11, the fluid supply / discharge pipes 11 are connected to the connection ports 23, respectively.

Particularly, in the fluid supply / discharge valve A according to the first, second, and third aspects of the invention, the air cell 10 of the system to be exhausted is used.
Based on the fluid pressure associated with the weight of the patient applied to b, the cap-shaped valve body 17 descends and comes into close contact with the valve seat 16, and the air cell of another system through the escape narrow passage 20 provided in the valve seat 16. The fluid is squeezed from 10b and is gradually exhausted from the air cell 10b of the other system while the flow rate is limited.

Particularly, in the fluid supply / discharge valve A according to the present invention as defined in claims 1, 2, 5, 6, and 7, the valve seat 16 and the valve body 17 are made of an elastic synthetic resin or synthetic rubber molded product. Since it is integrally molded, the valve seat 16
Also has excellent adhesion between the housing 13 and the lid 14,
Excellent air-tightness or liquid-tightness and does not generate solid collision noise during operation. Further, when the fluid from the air cell 10b of this system is exhausted, the valve seat 16 and the valve body 17 and the valve seat 16 are completely brought into close contact with each other based on the fluid pressure applied to the air cell 10b of the system according to the weight of the patient. The valve body 17 is closed and the air cell 10 of another system is passed through the escape narrow passage 20 formed on the peripheral surface of the truncated cone-shaped valve seat 16 or the peripheral surface and the bottom surface.
The fluid is squeezed from b and is gradually exhausted in a state where the flow rate is limited.

Particularly, in the fluid supply / discharge valve A according to the present invention as defined in claims 8 and 9, when the fluid is discharged from the air cell 10b of this system, the fluid pressure is added to the air cell 10b of this system according to the body weight of the patient. The valve body 17 is closed to prevent the fluid from flowing into the air cell 10b.
The fluid is throttled from the air cell 10b of this system through a small hole serving as the escape narrow passage 20 formed in the center of the air cell 10b of the other system, and the flow rate of the fluid is gradually reduced.
Exhausted from. Particularly, in the invention according to claim 9, when the patient leaves the bed or when the pressure applied to the air cell 10b is small, the second opening / closing valve 27 is kept closed, and the air in and out of the air cell 10b does not flow. Absent. Therefore, the air in and out of the air cell 10b at a portion where the floor sore is likely to occur is mainly performed. In the above-mentioned example, the fluid to be supplied has been described as air, but it is within the technical scope of the present invention even when hot water or the like is supplied.

[0026]

Embodiment 1 This embodiment is a representative embodiment of the invention described in claims 1 to 4, 11 and 12, and is a representative embodiment of the invention described in claims 13 and 14. A description will be given together with the embodiment.
In FIG. 1 and FIG. 2, A is a fluid supply / discharge valve, the plurality of cells 10b in the hollow mat 10 are divided into at least two systems, and each cell of each division is attached, and a group of cells 10b of each system is alternately arranged. Is expanded to support the body of the user, and when discharged, the cells 10b of each system are alternately contracted. The fluid supply / discharge valve A is provided in the hollow mat 1
It is a one-way quasi-flow rate control valve that has a large opening degree when injecting and expanding a fluid into 0 and has a small opening degree when not supplied. The valve seat 16 to the valve body portion 17 of the fluid supply / discharge valve A are When the hollow mat 10 contracts, the fluid can pass in the discharge direction, and the escape narrow passage 20 is opened so that the discharge flow rate is narrower than the flow rate at the time of the injection. The fluid supply / discharge valve A for the hollow mat 10 is a molded article made of elastic rubber or synthetic resin as a whole, and is attached to the cell 10b made of synthetic resin.

The fluid supply / discharge valve A is a short-cylindrical housing 13 attached to the opening of the hollow mat 10.
And a valve seat 16 and a valve body 17 that are detachably fitted in the housing 13, and a lid with a fluid supply / discharge pipe 11 that supports the valve seat 16 in the housing 13 and closes the outer end of the housing 13. 14 and the valve body 17 has
The escape narrow passage 20 through which the fluid in the hollow mat 10 can pass is provided, and the lid 14 serves as the housing 1.
The valve seat 16
The valve body 17 is detachably provided from the housing 13 when the lid 14 is removed (see FIGS. 4 to 6). The lid 14 and the housing 13 may be screwed with each other or may be engaged and disengaged so as not to come off unintentionally by an elastic engaging edge. In this valve seat 16,
A hole 15 for air supply is provided. In the embodiment of the invention having the pipe-shaped connection port 23, since the fluid supply / discharge pipe 11 is connected to the pipe-shaped connection port 23, when the entire fluid supply / discharge valve A is replaced, the fluid supply The drain pipe 11 can be removed.

The fluid inflow cross sectional area of the relief narrow passage 20 is 1 with respect to the fluid inflow cross sectional area formed between the valve seat 16 and the valve body 17 in the fluid supply / discharge valve A for the hollow mat 10.
It is about 1/0 to 2/10, and has a braking function to reduce the decreasing speed of the discharged fluid amount. The amount of air discharged from the hollow mat 10 through the escape narrow passage 20 is 1/2 to 3 minutes during one cycle in which the air is supplied through the hole 15 of the valve seat 16 and the escape narrow passage 20. The amount is reduced by about 1, and the cross-sectional area of the escape narrow passage 20 corresponding to this is set empirically.

The fluid supply / discharge valve A for the hollow mat 10 is attached to one end of a cell taper cone-shaped cell 10b (see FIG. 19) which is detachably attached to the base sheet 10a of the mat 10. There is.

The cell 10b is not limited to the two systems, and three systems, and those appropriately divided into more than three systems, also belong to the technical scope of the present invention. The fluid supply / discharge valve A for the hollow mat 10 of the fluid supply / discharge pipe 11 for each system and the fluid supply source 2
The switching valves 24a and 24b are independently provided at arbitrary positions between the five (see FIG. 1), and when the fluid is air, the switching valves 24a and 24b are completely closed and communicate with the fluid supply source 25 (see FIG. 1). A switch valve is provided (not shown) for switching between a position and an outside air opening position, and when the fluid is a liquid, the outside air opening position becomes the return tank position. The switching valves 24a and 24b are not limited to the three-position control valves described above.

The hollow mat 10 is a medical hollow mat. Cell 10b in the hollow mat 10
Among these, at least the cell groups located in the waist and buttocks, which are the portions where the user's bed sore easily passes, are the hollow mat 10
It is removably attached to the base sheet 10a by fixing means. Preferably, the width of the thicker end of each cell 10b is 1.5 to 4 times the width of the thinnest portion.

Embodiment 2 This embodiment is a typical embodiment of the invention described in claims 1, 2, 5, 6, 7, 11 and 12. The configuration different from that of Embodiment 1 is as follows. is there. The valve seat 16 and the valve body 1
7 is integrally formed of a synthetic resin or synthetic rubber molded product having elasticity, and the valve seat 16 and the valve body 17 are connected by a thin film 18 at a part thereof to form a hinge, and the valve body 17 is The valve seat 16 can be opened and closed freely (see FIGS. 7 to 10). A hole 15 for air supply is provided at a central portion of the valve seat 16 so as to penetrate therethrough, and the valve body 17 opens and closes the hole 15. The valve seat 16 is in the shape of a truncated cone, and the outer peripheral surface thereof has a small diameter on the hollow mat 10 side and a large diameter on the lid 14 side, and the lid 14 and the housing 13 are closely fitted and can be assembled. With this fitting, the valve seat 16 and the valve body 17 are sandwiched between the lid 14 and the housing 13, and the reliefs are provided at four positions along the outer peripheral surface of the truncated cone-shaped valve seat 16 which is fixed. A groove is formed as the narrow passage 20 (see FIG. 5). In addition, the same reference numerals as those in the first embodiment mean the same configurations and operations.

Embodiment 3 This embodiment is a typical embodiment of the invention described in claims 5, 6 and 8, and the configuration different from that of Embodiment 2 is as follows. The relief passage 20 is provided at the center of the valve body 17.
A small hole is formed so as to penetrate in the axial direction of the valve body 17 (see FIGS. 11 to 13). In addition, the second embodiment
The same reference numerals as in (1) mean the same configurations and operations.

Embodiment 4 This embodiment is a modification of Embodiment 1 and is the same as Embodiment 1.
The configuration different from is as follows. The fluid can pass in the discharge direction when the hollow mat 10 is contracted to the periphery of the valve seat 16 of the fluid supply / discharge valve A outside the hole 15, and the discharge flow rate is reduced to a smaller amount than the flow rate during the injection. The escape narrow passage 20 is opened (see FIGS. 14 and 15). In addition, the same reference numerals as those in the first embodiment mean the same configurations and operations. Embodiment 5 This embodiment is a typical embodiment of the invention described in claims 5, 6 and 9 and is a modification of Embodiment 3 and is formed as an escape narrow passage 20 in the central portion of the valve body 17. An on-off valve 27 that opens and closes the lower end of the small hole is connected to the valve body 17 with a thin film 26 and is hinged (see FIGS. 20, 21, and 22). When the air cell 10b is contracted, the second opening / closing valve 27 of the small hole is opened with the valve body 17 closed (see FIG. 2), and the air is discharged from the air cell 10b through the small hole. When the load on the air cell 10b is small and the load is a bite, the second opening / closing valve 27 maintains the closed state.
In addition, the same reference numerals as those in the third embodiment mean the same configurations and operations.

[0035]

According to the invention of claims 1 to 14, when it is desired to turn over a patient such as a bedridden elderly person or a user, the fluid supply / discharge valve is provided, for example, from a common air supply source through one air supply pipe. When A is opened and air is alternately supplied to the cells 10b group of each system, the cells 10b of one system swell first. Fluid is discharged from the cell 10b of the other system through the escape passage 20 of the fluid supply / discharge valve A,
Shrinks slightly flat. At this time, due to the exhaust from the escape narrow passage 20, the exhaust amount of the fluid is significantly smaller than the supply amount thereof, the entire amount is not exhausted at one time, and the cell 10b of the other system is not completely flattened, It can be maintained in a partially inflated state and can be deflated in a form that can support the patient. Further, it is possible to suppress abrupt cell deformation when a local force is applied to the cell 10b, and to moderate the contraction of the cell 10b, whereby the body pressure dispersion can be maintained at a low pressure. When it is desired to change the position of a patient such as a bedridden elderly person or a user, for example, one air supply pipe 11 is passed from a common air supply source, and the fluid supply / discharge valve A of the cell 10b group of each system is opened / closed, When air is alternately supplied to the cells 10b of each system, the cells of one system swell first, and the fluid is discharged from the cells 10b of the other system through the escape narrow passage 20 of the fluid supply / discharge valve A, Due to the slightly flat contraction and the exhaust from the escape narrow passage 20, the exhaust amount of the fluid is significantly smaller than the supply amount thereof, and the entire amount is not exhausted at one time.
The cell 10b of the other system does not become completely flat, but expands to some extent and can contract in a form capable of supporting the patient. In this state, the body position of the patient such as a bedridden elderly person or the user can be stably displaced. . In particular, even the cell 10b that is in contact with the waist, buttocks or heel of a patient who is strongly exposed to external pressure does not contract rapidly, does not cause a bottoming phenomenon, and requires a pressure sensor for each system and a control system associated therewith. In other words, there is an effect of preventing rapid contraction of the specific cell 10b that cannot be controlled at all by the pressure sensor control. In this way, the cell 10b of one system is completely expanded and the cell 10b of the other system is expanded.
The patient can be supported by the mat 10 in a state where the supporting force of the patient is reduced. Therefore, without causing discomfort to the patient,
Moreover, the effect which does not cause a bedsore can be exhibited.

Particularly, in the fluid supply / discharge valve A according to the present invention as set forth in claims 2, 3, 4, and 11, when the fluid is discharged from the cell 10b of another system, the fluid is discharged according to the weight of the patient who is added to the cell 10b of this system. The cap-shaped valve body 17 is displaced based on the fluid pressure, and is brought into close contact with the valve seat 16, the fluid supply / discharge valve A is closed, and the cell of this system is passed through the relief narrow passage 20 provided in the valve body 17. The fluid is squeezed from 10b and is gradually exhausted from the cell 10b of this system in a state where the fluid is squeezed at a low speed.
The exhaust amount of the fluid is smaller than the supply amount, the entire amount is not exhausted at once, and the cell 10b of this system is not completely flattened,
It can remain inflated to some extent and contract in a patient-supportable fashion. Further, when the fluid supply / discharge valve A is damaged, the lid 14 of the fluid supply / discharge valve A is removed from the housing 13, and a damaged part, for example, the valve seat 16 or the cap-shaped valve 17 is attached. It can be easily replaced with a new one, and the portion of the mat 10 and the cell 10b to be discarded can be reduced.

Particularly, in the fluid supply / discharge valve according to the invention as claimed in claims 2, 5, 6, 7, 10 and 11, when the fluid is exhausted from the cell 10b of the other system, the patient who joins the cell 10b of the system is informed. The valve body 17 is closed based on the fluid pressure accompanying the body weight, and the fluid is squeezed gradually from the cell 10b of the other system through the relief narrow passage 20 formed on the peripheral surface of the truncated cone-shaped valve seat 16 to gradually reduce the cells of this system. You can exhaust from 10b, and as a result,
A form in which the exhaust amount of the fluid is markedly smaller than the supply amount thereof, the entire amount is not exhausted at one time, the cell 10b of this system is not completely flattened, and the expanded state is maintained to some extent to support a patient. Can be contracted with. Further, when the fluid supply / discharge valve A is damaged, the lid 1 of the fluid supply / discharge valve A is
4 can be easily removed from the housing 13 and the damaged part, for example, the central valve 20 or the truncated cone-shaped valve body 21 can be replaced with a new one.
0, the portion of the cell 10b to be discarded can be reduced.

According to a tenth aspect of the invention, the lid 1 is further provided.
The inner surface of 4 is in close contact with the bottom surface side of the valve seat 16, and the fluid supply / discharge pipe 11 that penetrates the lid 14 between them.
Since the flange portion of can be closely clamped, it can be easily attached to and detached from the hollow mat, the sealability at the time of assembly can be improved, and the height of the fluid supply / discharge valve A can be reduced. Does not give the user a feeling of strangeness.

In the invention according to claim 8, since a small hole is formed as the escape narrow passage 20 in the center of the valve body 17, the effect of the invention according to claim 7 is increased. Can be demonstrated without any In the invention of claim 9, the effect of the invention of claim 7 can be exhibited without increasing the number of parts. Also, when the patient leaves the bed,
Alternatively, with a small pressure applied to the cell 10b, the second opening / closing valve 27 can be maintained in the closed state.
It is possible to stop the flow of fluid in and out of the cell b, and it is possible to mainly perform the flow of fluid in and out of the cell 10b in a portion where bed sores are likely to occur. In the invention according to claim 14, among the cells 10b in the hollow mat 10, at least the cell group located at a site where the user is likely to have a bed slip is detachable from the base sheet 10c of the hollow mat 10 by a fixing means. Since it is attached, the cell 10b in this portion does not contract rapidly, and in the state in which the user is lying down, it is possible to prevent bed sickness of the patient without requiring a complicated pressure sensor, and care It has the effect of not hindering work. When the backrest of the hollow mat 10 is lifted up and the user uses it in an angled position, the pressure sensor of each system may be used together with the fluid supply / discharge valve A. Further, when the fluid supply / discharge valve A is not provided in the cell 10b located at a position where there is no risk of bed sores, the structure of the hollow mat can be simplified.

[Brief description of drawings]

FIG. 1 is a perspective view of an actual form 1. FIG.

FIG. 2 is a longitudinal sectional end view of a main part of FIG.

FIG. 3 is a longitudinal sectional end view of a main part of the second embodiment.

FIG. 4 is a half sectional view of the fluid supply / discharge valve in FIG.

FIG. 5 is a half sectional view similar to FIG. 4 with the valve element lowered.

FIG. 6 is an exploded half sectional view of FIG.

FIG. 7 is a half sectional view of the fluid supply / discharge valve in FIG.

FIG. 8 is a half sectional view similar to FIG. 7, showing a state in which the valve body of FIG. 7 is closed.

9 is an exploded half sectional view of FIG. 7. FIG.

10 is a plan view of the valve body of FIG. 7. FIG.

FIG. 11 is a half sectional view of a liquid supply / discharge valve according to a third embodiment.

FIG. 12 is a half sectional view similar to FIG. 11, showing a state in which the valve body of FIG. 11 is closed.

13 is a plan view of the valve body of FIG. 4. FIG.

FIG. 14 is a half cross-sectional view of the liquid supply / discharge valve according to the fourth embodiment.

15 is a half cross-sectional view showing a lowered state of the valve body of FIG.

FIG. 16 is a schematic side view when an air cell is attached.

FIG. 17 is a schematic side view showing an intake / exhaust state of an air cell.

FIG. 18 is a schematic side view showing a suction / discharge state different from FIG.

FIG. 19 is a side view of the air cell.

FIG. 20 is a half cross-sectional view of the liquid supply / discharge valve of the fifth embodiment.

21 is a partially omitted cross-sectional view showing a state where the valve body in FIG. 20 is open.

22 is a partially omitted cross-sectional view showing a state where the valve body in FIG. 20 is closed.

[Explanation of symbols]

A Fluid supply / discharge valve 10 mat 10 10b air cell 13 housing 14 Lid 16 valve seat 17 valve body 18 thin film 20 escape narrow passage

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Claims (14)

[Claims] 1. A plurality of cells 10b in a hollow mat 10.
Is divided into at least two systems, and is installed in each cell of each system, and in the fluid supply / discharge valve A for the hollow mat for alternately expanding and contracting the cells 10b group of each system, the fluid supply / discharge valve A Is a one-way quasi-flow control valve having a large opening degree when injecting and expanding the fluid into the cells 10b group of each system and a small opening degree when not supplying, and the flow path having the small opening degree is the fluid supply A fluid supply / discharge valve for a mat, comprising a relief narrow passage 20 provided in the valve seat 16 to the valve body portion 17 of the discharge valve A. 2. The fluid supply / discharge valve A is a short cylindrical housing 13 attached to the opening of each cell 10b,
A valve seat 1 which is detachably fitted in the housing 13.
6 and the valve body 17, and the valve seat 16 to the housing 13
At least one of the valve seat 16, the valve body 17, and the mating surface of the valve seat 16 and the valve body 17 is constituted by a lid 14 having a fluid supply / discharge pipe 11 supported therein and closing the outer end of the housing 13. The escape narrow passage 20 through which the fluid in each cell 10b can pass is provided at one place, the lid 14 is detachable from the housing 13, and the valve seat 16 to the valve body 17 are The fluid supply / discharge valve for a hollow mat according to claim 1, wherein the fluid supply / discharge valve for a hollow mat is provided so as to be detachable from the housing 13 when the lid 14 is removed. 3. The valve body 17 has a loop-shaped valve portion 17a and a leg portion 17b axially slidable through a part of the valve seat 16 from the center of the valve portion 17a. , This valve seat 16
On the other hand, the leg portion 17b is inserted into the valve seat 16 from the side of each cell 10b, and is provided so as to be displaceable by fluid pressure within a desired range in the axial direction of the valve body 17. The fluid supply / discharge valve for a hollow mat according to 1 or 2. 4. A fluid supply / discharge valve for a hollow mat according to claim 1, 2 or 3, wherein said escape narrow passage 20 is provided in the central portion of said valve body 17 so as to penetrate this axis. 5. The valve seat 16 and the valve body 17 are integrally formed of a synthetic resin or synthetic rubber molded product having elasticity, and the valve seat 16 and the valve body 17 are partly thin films. The fluid supply / discharge valve for a hollow mat according to claim 2, wherein the valve body 17 is connected and hinged so that the valve body 17 can be opened and closed with respect to the valve seat 16. 6. The valve seat 16 is in the shape of a truncated cone, the outer peripheral surface of which has a small diameter on the hollow mat 10 side and a large diameter on the lid 14 side, and the lid 14 and the housing 13 are closely fitted together, The valve seat 16 and the valve body 17 are sandwiched between the lid 14 and the housing 13 and fixed by this fitting.
The fluid supply / discharge valve for the hollow mat described. 7. Along the outer surface of the frustoconical valve seat 16,
7. The fluid supply / discharge valve for a hollow mat according to claim 6, wherein a groove is formed as the escape narrow passage 20 in at least one location. 8. The hollow according to claim 5, wherein a small hole is formed in the central portion of the valve body 17 as the escape narrow passage 20 so as to penetrate in the axial direction of the valve body 17. Fluid supply / discharge valve for mats. 9. A second opening / closing valve 27 for opening and closing the small hole as the escape narrow passage 20 formed in the central portion of the valve body 17 is formed on the valve body 17 by a second thin film. 9. The fluid for a hollow mat according to claim 8, wherein the second on-off valve 27 is urged in a direction in which the second on-off valve 27 is connected and hinged, opens toward the fluid supply side, and is always closed by the elasticity of the second thin film. Supply and discharge valve. 10. The inner surface of the lid 14 can be brought into close contact with the bottom surface side of the valve seat 16, and the flange portion of the fluid supply / discharge pipe 11 penetrating the lid 14 can be closely sandwiched between them. The fluid supply / discharge valve for a hollow mat according to claim 5, 6, 7 or 8. 11. A pipe-shaped connection port 23 connected to an end of the fluid supply pipe 11 is provided at the center of the bottom of the lid 14 so as to project outward.
The fluid supply / discharge valve for a hollow mat according to 3, 4, 5, 6, 7, 8, 9 or 10. 12. The fluid supply / discharge valve A for the hollow mat 10 is a molded product made of elastic rubber or synthetic resin as a whole, and is attached to the cell 10b made of synthetic resin. 2, 3, 4, 5, 6, 7, 8, 9,
The fluid supply / discharge valve for a hollow mat according to 10 or 11. 13. The method according to claim 1, 2, 3, 4, 5, 6, 7,
The hollow mat 1 according to 8, 9, 10, 11 or 12
A hollow mat having a 0 fluid supply / discharge valve A and including a cell 10b. 14. A cell 10b in the hollow mat 10.
14. The hollow according to claim 13, characterized in that at least the group of cells 10b located at a site where a user's bed sore is likely to occur is detachably attached to the base sheet 10c of the hollow mat 10 by a fixing means. mat.