JP4527387B2 - Air mat - Google Patents

Description

A sick person who cannot turn over himself / herself develops pressure ulcers (bed slippage) in which the local tissue becomes necrotic because the blood circulation of the skin tissue deteriorates due to pressure on the same part. In order to prevent this, diffusion of the pressure receiving portion, movement of the position of the pressure receiving portion, and dehumidification are effective. Shiatsu and massage are effective for recovery from fatigue even for healthy people. The present invention belongs to a mat structure of an air mat apparatus that achieves the above-mentioned purpose by expanding the expansion chambers divided into a plurality of groups by expanding and contracting by exhausting.

FIG. 1-a shows an outline when a person lies down. In FIG. 1-b, b, d, f, and h have a relatively low surface pressure per unit, but a large area. c, e, g, and i have a small area but a high surface pressure (protrusion). However, since these differ greatly from person to person, a wide variety of mats are provided to deal with them. Therefore, the mat structure is often complicated and expensive. For example, FIG. 5 shows a mat in which two vinyl chloride sheets are overlapped, and a periphery of 1.5.6.7 is welded, and a through hole 2 is drilled therein and a periphery of the through hole 2 is welded. Although the air pressure is made airtight and the apex 11 is formed by bulging with the sealed air filled with pressurized air from the air vent 3, the pressure receiving area is simply diffused, but other requirements are not achieved.

Also, FIG. 6 divides the air bag into a plurality of groups (two groups in this figure) A ′ and B ′ groups, and connects the A system pipe and the B system pipe to each, and vents and exhausts air from the air unit. In this way, the air bags A ′ and B ′ are inflated and contracted to repeat the diffusion of the surface pressure of the pressure receiving portion and the movement of the position. For dehumidification, the air bags A ′ and B ′ have fine holes. Depending on the fumarole, some of them are dehumidified by controlling the fumarole from the piping of the third system (not shown). If acupressure and massage effects are added to the requirements to be provided, the structure becomes more complicated.

FIG. 7 shows another example and is an example of a mat formed by welding two vinyl chloride sheets and the like in order to simplify the air bag. Weld the peripheries 1, 5, 6 and 7 of the mat, and prevent any number of lateral lines from separating from the lines 1 and 7 around the mating lines, a, b, c, d, ... Next, the vertical partition lines α, β, γ, δ, ε are opened and welded. Next, if ventilation of high pressure and low pressure is alternately performed from the B system of the A system 4 of 3, the horizontal dividing lines in FIG. 7 , i, b, c, and d and the vertical dividing lines α, β, γ, In the frame surrounded by δ and ε , the center 11 has the highest bulging vertex 11. Accordingly, a mat function capable of dealing with the diffusion of the pressure receiving portion, the movement of the position, the finger pressure, and the massage effect by alternately repeating the ventilation of the A system B system is provided. However, in this type of mat, stress concentrates at the corner where the vertical branch line and the horizontal partition line intersect, and the portion near the center is frequently bent during use, so the intersection Air leakage due to breakage of is easy to occur.

Example shown in FIG. 8,熔mat peripheral 1,5,6, 7 those熔着by dedicated heating plate in the form shown by the solid line waveform in FIG. 8 to overcome the drawbacks of the mat shown in FIG. 7 Then, after welding with the curve of the waveform 10, this sheet is advanced by 1 pitch and welded at the dotted line portion. By repeating this procedure to produce a mat of the required length, there is no harmful effect of crossing the partition lines by welding as shown in Fig. 7, but currently there is a need for a dedicated hot platen (type). Not only is the initial equipment cost expensive, but the model change requires cost and time. A dedicated device is also required for dehumidification.

  The air mat device for preventing pressure ulcers of sick people and recovering fatigue of healthy people is the contact area with the mat user, that is, the diffusion of the pressure receiving area between the user's body and the mat (expanding the pressure receiving area) In order to repeat the movement of the part and the change of pressure, and to obtain the effects of massage and acupressure, these repetition rates are appropriate and it is necessary to dehumidify. The present invention seeks to solve these problems in a simple manner.

In the present invention , a plurality of air chambers are formed by welding wires formed by welding two sheets of thermoplastic synthetic resin, and the air chambers are expanded and contracted alternately for each system. In a repeated air mat, a plurality of through-holes are provided in the middle of the opposing welding wires that are welded in a straight line, and air can pass between the inner circumference of the through-holes and the welding wire. A nodular air chamber is formed by welding so as to leave a simple passage.

Since the present invention is configured as described above, the following effects can be obtained.

The present invention熔着a boundary between the air chamber of the neighbor system with a linear熔着line 12, the intersection of熔着by providing the through hole 14 in which a plurality of熔着between both sides of the boundary straight line dispersion and repeated bending of due to fatigue destruction relaxation without stress Ru can. (See Figure 4)

  As described above, the welding through-hole is opened, and the air chambers around the hole are alternately expanded and contracted for each system. Therefore, the welding through-hole 14 is ventilated by the pump effect by the breathing action, and a special dehumidifying device is not required. It was.

Reference Example FIG. 1-a is a figure when a person lies down and shows a contact state with the floor surface. As shown in FIG. 1B, portions where contact pressure is applied are portions a, c, e, g, and i. In order to relieve the contact pressure of these portions, b, d, e, f, It is necessary to share body pressure also in the void part of the h part .

  For the above purpose, each air chamber is not a simple cylinder in order to repeat the ventilation of high pressure and low pressure in each air system of mat (two systems in FIG. 1-C), and to improve the acupressure and massage effect. It is necessary to have a knot shape with appropriate irregularities, and it is required to have a high repetition rate of high pressure and low pressure.

  For the above reasons, the mat that repeats the expansion and contraction of multiple air chambers by stacking two sheets and fusing them is likely to damage the crossovers of the welding wire, and additional measures for dehumidification are required. Become.

Order to solve the above-mentioned requirements, as shown in FIG. 3, the熔着through hole 14 on the boundary between the adjacent air chamber is provided, it knots stress adjacent through-holes 14 and熔着lines (12, 13) Is dispersed, the impact at the time of changing the ventilation pressure is relieved by elastic deformation of the through-hole 14, and further, the inside of the through-hole 14 is ventilated by a breathing action by expansion and contraction around the through-hole 14 to perform dehumidification. In addition, as shown in FIG. 2, the mat is formed by providing welding through-holes 14 at the boundary, continuously forming adjacent through-holes 14 by welding wires 12, and cutting them to an arbitrary length. You can also.

In the figure, reference numeral 15 denotes the apex of the bulge during ventilation of the A system air chamber, and 11 denotes the apex of the bulge of the B system. The mat was prepared under the following conditions.
Matte size 60cm side 90cm side
Mat material Soft vinyl chloride
〃 Tensile strength 2600N / cm ²
伸 び Elongation 370%
〃 Brittle temperature -30 ℃
Two types of sheet thickness 0.4mm and 0.5mm
Welding conditions
Welding material High frequency welder foot type
〃 Output 4kw
〃 Maximum pressure 250kg
Welding conditions Electrode material Brass
Electrode structure Through-holes are welded and cut simultaneously
Straight line is strip-shaped (1)
Welding time 2 to 4 seconds Note that the working conditions of the mat are similar to those of Example 1 and will not be described.

Example
In FIG. 4 showing the embodiment of the present invention, the boundary welding wire 12 of each system (two systems in the figure) is a straight line, but a passage 16 capable of passing air is left in the air chamber sandwiched between the welding wires 12. by providing熔着through hole 14 as a cushioning effect of the through hole 14 with forming a crossover of熔着make nodular protrusions to the air chamber, and to perform the dehumidification by insufflation.

a A figure of a person lying on the floor. The figure which shows the relationship between the space | interval of an air chamber in a 2 system air mat, and a swelling. The top view which shows the example of the unequal division | segmentation of the air chamber of a C2 type | system | group air mat. The sketch of the example which provides a welding through-hole in a boundary and connects an adjacent through-hole with a welding wire, and makes a mat | matte continuously. The top view of the air mat of a reference example. The top view of the air mat used as the Example of this invention . The top view which shows an example of the conventional mat. The top view which shows the state which joined the air pump to the conventional mat | matte. It is a top view which shows the example of the mat which is a mat relevant to this invention but whose stress concentrates on the crossing part of a welding part. The top view of the example which is a mat | matte relevant to this invention, but does not have a welding part.

Explanation of symbols

1.5.6.7 Periphery of mat 2. Conventional through hole 3.4 Vent hole 10. 10. Corrugated boundary welding wire B system bulge top 12.13. Welding wire 14. Welding through hole 15. A system bulge top 16. A passage through which air can pass. B. C. D. Horizontal partition line α.β.γ.δ.ε. Secondary partition line 3'.4 'Spare vent for connection

Claims (1)

Air in which a plurality of air chambers are separated by a welding wire formed by fusing two sheets of thermoplastic synthetic resin, and the air chambers alternately repeat expansion and contraction for each system. In the mat
A plurality of through-holes are provided in the middle of the opposed welding wires that are welded in a straight line, and the inner circumference of the through-holes is left so as to leave a passage through which air can pass between the welding wires. An air mat, characterized in that it is worn to form a knotted air chamber.

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