JPH0356057B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mat for preventing pressure sores that occur in sick people who are unable to move their bodies and remain in bed for a long period of time, particularly an air mat. The present invention relates to a mat for preventing bedsores, which is characterized in that it prevents the user from experiencing a seasickness-like condition when the chamber is periodically expanded and contracted.

[Prior art] Air mats are generally used as mats for preventing bedsores, and this type of conventional air mat E′ is
As shown in FIG. 4, tubular air bladders 1a, 1b, 2a, 2b...5a, 5b which can be expanded and contracted are arranged in parallel, and these air bladders 1a, 1 are arranged in multiple rows.
b...From 5a, 5b, air sacs 1a, 2 in every other row
Divide into two systems of air sac groups A and B: air sac group A that connects a...5a at one end, and air sac group B that connects the remaining air sacs 1b, 2b...5b at the other end. The two air bladder groups A and B connect their respective connection ports 6 and 7 to an air supply device such as a compressor or an air pump via valves 8 and 9 to supply and exhaust air. It is formed in a structure in which groups A and B are expanded and contracted alternately (for example, Japanese Patent Application Laid-Open No.
-96251).

And an air mat with the structure above
E' supplies air to air sac group A in one system and exhausts air sac group B in the other system at the same time, or sets a time difference between air supply and exhaust, for example, when air sac group A in one system is exhausted. It is common practice to alternately inflate and deflate the air bladders by various means, such as starting air supply to the air bladder group B of the other system after exhaustion is complete.

[Problem to be solved by the invention] Mat for preventing bedsores as described in the conventional technology
E' represents the air sacs 1a to 5a in every other row and the remaining air sacs 1
When supplying air to and exhausting air sac groups A and B of two systems b to 5b, for example, while supplying air to air sac A of one system, air sac group B of the other system is exhausted. When the air sacs 1a, 1b
~ 5a and 5b are formed into a tube shape and arranged in parallel, and since multiple rows are connected in series at every other row for each air sac group A and B of each system, one air sac group A is connected to the sedimentation of air. Accordingly, the air sacs 1a expand in the order of the air sacs 2a, 3a, 4a, 5a, and in the other air sac group B, the air sacs 5 expand to the air sacs 4b, 4b, 2b,
It contracts in the order of 1b, but when this kind of expansion and contraction is done alternately, it gives the person lying on the air mat E' the feeling that the air mat E' is moving up and down,
The air sacs 1a, 1b to 5a, 5b will vibrate, giving the feeling of moving undulations, and if you can periodically experience the feeling of vertical shaking and undulations moving for a long time. , it stimulates the inner ear's semicircular canal and other deep senses in the body, disrupting the sense of parallelism and resulting in conditions such as car sickness or seasickness, especially for patients with weakened bodies. Because they are sensitive to these stimuli, they tend to lose their sense of parallelism, which can lead to conditions like seasickness. In addition, if a time difference is set in the supply of air between air sac groups A and B, for example, when one air sac group A finishes exhausting, the other air sac group B
As you inflate the air sacs, you will experience the sensation of undulations moving more strongly, and therefore,
It has disadvantages such as being more likely to cause conditions such as seasickness, making it difficult to escape from discomfort, and making it unsuitable for use by sick people.

The present invention has been made in view of the problems of the prior art, and its purpose is to connect the air chambers in series in one of the first and second air chamber groups. The air chambers connected to the chamber and the side rows always expand in horizontal and vertical rows to support vertical movement and slow the supply and discharge of air to multiple air chambers to move the undulations caused by the wave motion of the air chambers. To provide a mat for preventing bedsores that does not give the user a feeling of discomfort and does not cause a condition like seasickness.

[Means for Solving the Problem] In order to achieve the above object, the bed sore prevention mat of the present invention divides a large number of air chambers that can be expanded and contracted into two systems of air chamber groups. In the mat for preventing bedsores, in which air is alternately supplied and exhausted from one end of each air chamber group, the first and second air chamber groups each have a conductive portion between a large number of air chambers that can be expanded and contracted. and a side row in which at least one air chamber is connected as a column to one side via a conductive part to each of the air chambers in the series, and the first air chamber group has air chamber and second
The air chambers of the air chamber groups are arranged in a plover shape.

The ratio of the conductive parts connecting the series air chambers to the conductive parts connecting the side rows is set to 1/3≦diameter of the conductive portion in the side row direction/diameter of the conductive portion in the series direction≦1. is preferred.

[Operation] When air is alternately supplied and exhausted to the first and second air chamber groups formed by adding side rows connected vertically to the main rows connected in series in the horizontal direction,
A large number of air chambers connected in series expand and contract alternately in every other row, and a large number of air chambers connected in side rows also expand and contract alternately in every other row, so that a large number of air chambers in one of the air chamber groups are always aligned horizontally. By expanding in a vertical line, they support the human body and prevent vertical movement and shaking. The air supply and discharge speeds of the large number of air chambers connected through the conductive portions are slow, and the expansion and contraction of the air chambers becomes very slow. In particular, the supply and discharge of air to and from the side rows of air chambers branched off from the series will be slower, and expansion and contraction will be slower.
It eliminates wave phenomena and does not cause conditions like seasickness.

Furthermore, the number of air chambers in the side rows may be increased, or the diameter of the conductive portion connecting the air chambers in series may be reduced to 1/1 of the diameter of the conductive path connecting the side rows.
By setting the size to 4, the supply and discharge of air to the air chambers in the side rows is made even slower, and the occurrence of wave phenomena and conditions such as seasickness are made more difficult.

In addition, the large number of air chambers that are connected through conductive parts and formed individually come into surface contact with the human body, so the undulations that move due to the linear contact sensation like the conventional tubular air sacs can be avoided. Since there is no sensation, not only does it not cause conditions like seasickness, but also local congestion can be avoided.

Therefore, it is possible to effectively prevent the occurrence of congestion, which is considered to be a cause of bedsores, without causing a condition such as seasickness.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, an air mat E is connected to one side of each air chamber 1 connected in series through a conduction part 3, with the main row being a series in which a large number of air chambers 1 which are freely expandable and deflated are connected in horizontal rows through a conduction part 2. at least 1 to
A first air chamber group N having a side row in which two expandable and deflated air chambers 4 are brought into contact in a column, and a series connection in which a number of similarly expandable and deflated air chambers 5 are connected as a horizontal row through a conductive portion 6 is mainly used. At least one expandable and deflated air chamber 8 corresponding to the air chamber 4 in the side row of the first air chamber group N is connected to one side of each of the air chambers 5 connected in series through the conduction portion 7. A second air chamber group M having side rows connected in tandem is arranged so that the air chambers 4 and 8 of each side row face each other to form a plover shape. and the second air chamber group M are arranged in every other row. That is, the first
In the air chamber group N, the air chambers 4 in the side row face downward, and the air chambers ₈ in the side row of the second air chamber group M face upward. M ₁ , first air chamber group N ₂ ,
Second air chamber group M ₂ , first air chamber group N ₃ , second air chamber group M ₃ ...first air chamber group N _o , second air chamber group M _o (n
are integers arranged in the order of, for example, 1 to 5), and the first
The air chambers 4 in the side row of the air chamber group N and the air chambers 8 in the side row of the second air chamber group M face each other, for example, between the first
Between the rows of air chamber group N ₁ and second air chamber group M ₁ , the air chambers 4 and 8 in the side rows of each other are arranged in a plover shape, and the second air chamber group M is arranged in series. Air chamber 5 and 1
Between directly adjacent rows of air chambers 1, which are side rows of the air chamber group N, for example, between the second air chamber group _M1 and the first air chamber group _N2 , the air chambers are in series with each other. 1 and 5 are arranged in a plover shape.

The plurality of first air chamber groups N ₁ to _{N o} are connected to an air sac 10 disposed on one side of the air mat E via a conductive portion 9 at the air chamber 1 located at the end of the series,
The plurality of second air chamber groups M ₁ to _{M o} are connected to an air chamber 12 disposed on one side of the air mat E via a conductive portion 11 at the air chamber 5 located at the end of the series, System of air chambers N ₁ to N _o and the second air chamber group
It is divided into two systems: M ₁ to M _o systems. The first and second air chamber groups N ₁ to N _o and M ₁ to _{M o} of these two systems have respective air sacs 10,
Air is supplied and exhausted from connection ports 13 and 14 provided at 12.

The air mat E is made by overlapping two sheets made of thermoplastic synthetic resin material, and connects the air chambers 1 and 4 of the first air chamber group N ₁ to _{N o} and the second air chamber group M ₁ to M _o.
The air chambers 5 and 8 are arranged in a plover shape,
Air sacs 10 and 12 are arranged on both sides, and a first air chamber group is formed.
Ultrasonic waves or high-frequency vibrations are applied so that the air chambers _{1 and} 5 at each end of the second air chamber group M ₁ to _{M o} are connected to the respective air sacs 10 and 12. Manufactured by a dressing method.

In FIG. 2, a first air chamber group N and a second air chamber group M are connected in series in which a large number of air chambers 1 and 5, each of which can be expanded and contracted, are connected in horizontal rows via conductive parts 2 and 6. Each of the air chambers 1 and 5 in series has a side row in which two freely expandable air chambers 4 and 8 are connected in tandem to one side via the conductive parts 3 and 7, and the first By arranging the two air chambers 4 forming the side rows of the air chamber group N and the two air chambers 8 forming the side rows of the second air chamber group M so as to face each other in a plover shape, the first The two air chambers 4 in the side row of the air chamber group N and the two air chambers 8 in the side row of the second air chamber group M are arranged alternately in a vertical row to form the side row air chambers 4, By increasing the number 8, the speed of supply and exhaust of the air chamber is slowed down, and the speed of expansion and contraction becomes even slower, thereby making conditions such as seasickness more likely to occur.

In FIG. 3, a first air chamber group N and a second air chamber group M are connected in series in which a large number of air chambers 1 and 5, each of which can be expanded and contracted, are connected in horizontal rows via conductive parts 2 and 6. Each of the air chambers 1 and 5 in series has a side row in which at least three inflatable air chambers 4 and 8 are connected in tandem to one side via the conductive portions 3 and 7, and the first By arranging the three air chambers 4 forming the side row of the air chamber group N and the three air chambers 8 forming the side row of the second air chamber group M so as to face each other in a plover shape, the first The three air chambers 4 in the side row of the second air chamber group N and the three air chambers 8 in the side row of the second air chamber group M are arranged alternately in a column, as in the case of FIG. , it is possible to obtain the effect of further slowing down the rate of expansion and contraction.

In addition, in FIGS. 1 to 3, the conductive parts 2 and 6 connecting the air chambers 1 and 5 in series of the first and second air chamber groups N ₁ to N _o , M ₁ to _{M o} and the side rows By appropriately setting the ratio of the sizes of the conductive parts 3 and 7 that connect the air chambers 4 and 8, the time difference between the expansion and contraction of the air chambers 4 and 8 in the side rows can be reduced to the expansion and contraction time of the air chambers 1 and 5 in the series. It is preferable to set it to be arbitrarily shifted with respect to contraction.

For example, the conductive parts 3 and 7 connecting the air chambers 4 and 8 in the side rows
If the diameter of the air chambers 1 and 5 in series is set to 1/4 of the diameter of the conductive portions 2 and 6 that connect the air chambers 1 and 5 in series, the air chambers 4 and 8 in the side row direction
The air chambers 1 and 5 expand and contract with a considerable time difference compared to the air chambers 1 and 5 in the series direction.

This ratio is (a) The diameter of the conducting part when air is introduced: 1/3 ≦ Diameter of the conducting part in the side row direction / Diameter of the conducting part in the series direction ≦ 1 (b) When two sheets are stacked In terms of the width of the conductive part when forming the air mat by welding, it is preferable to set it in the following range: 1/3≦width of the conductive part in the side row direction/width of the conductive part in the series direction≦1.

Furthermore, as one of the factors that promote bedsores,
Bacteria propagation may occur due to the temperature and humidity of the bed, but by making an appropriate number of small holes in the air chambers 1 and 5 or the conduction paths 3 and 6, the expansion and contraction of the air chambers 1 and 5 can be further slowed down. It is preferable to avoid causing a condition like seasickness by blowing fresh air into the sleeping area to suppress the growth of bacteria and prevent the development of bedsores.

[Effects of the Invention] Since the present invention has the above-described configuration, in claims 1 and 2, when air is alternately supplied and exhausted to the first and second air chamber groups, a large number of air chambers forming a horizontal row are provided. The air chambers in the air chambers expand and contract alternately in every other row, and the many air chambers in the column also expand and contract in alternate rows, and the many air chambers in one of the air chamber groups always expand in rows and columns. This supports the human body and prevents the user from feeling the vibrations of vertical movement. The air supply and discharge speeds of the large number of air chambers connected through the conductive portions are slow, and the expansion and contraction of the air chambers becomes very slow. In particular, the supply and discharge of air to and from the vertical air chambers separated from the horizontal rows is slower, and the expansion and contraction are slower, which eliminates the wave phenomenon and prevents conditions such as seasickness.

In addition, a large number of air chambers that are connected through conductive parts and formed individually come into surface contact with the human body, so that local congestion can be avoided.

Furthermore, since the method of welding two sheets of thermoplastic synthetic resin material using ultrasonic waves or high-frequency vibrations uses a mold, even if the air mat has a complicated shape, it can be manufactured very easily.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an air mat in which one vertical air chamber is connected to each horizontal air chamber of each air chamber group;
Figure 2 is a plan view showing an air mat with one vertical air chamber connected to each horizontal row of each air chamber group, and Figure 3 is a plan view showing an air mat with one vertical air chamber connected to each horizontal row of each air chamber group. Plan view showing an air mat connecting vertical air chambers, No. 4
The figure is a plan view of a conventional mat for preventing bedsores. N...first air chamber group, M...second air chamber group,
1, 4, 5, 8... air chamber, 2, 3, 6, 7, 9,
11...Conducting part, 10,12...Air sac, 13,1
4...Connection port.

Claims (1)

[Scope of Claims] 1. A large number of air chambers that can be expanded and contracted are divided into two systems of air chamber groups, and air is alternately supplied and exhausted from one end of each air chamber group. In the mat for preventing bedsores, the first and second air chamber groups each have a large number of air chambers that can be expanded and contracted in series and are connected in horizontal rows through conductive parts, and each of the air chambers in the series has a conductive part. a side row to which at least one air chamber is connected as a column through the side row;
A mat for preventing bedsores, wherein the air chambers of the first air chamber group and the air chambers of the second air chamber group are arranged in a plover shape. 2. The ratio of the conductive part connecting the series air chambers and the conductive part connecting the side row air chambers according to claim 2 is 1/3≦diameter of the conductive part in the side row direction/diameter of the conductive part in the series direction ≦1 A mat for preventing bedsores.