JPH0327632Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an air mat, and more specifically, the present invention relates to an air mat, and more specifically, the present invention involves welding both sheet-like bodies to the front and back of the air mat to form a meandering passage inside the air mat. Regarding technology that aims to improve

[Background technology]

Conventionally, as shown in FIGS. 1 and 2, a bag-like body 2' is constituted by a sheet-like body 1' on the front side and a sheet-like body 1' on the back side, and the middle part of the bag-like body 2' is In this step, both sheet-like bodies 1', 1' are welded in a substantially linear shape from one side of the bag-like body 2' to the other side, leaving at least one side edge portion, to form the bag-like body 2. In the air mat A' which has a meandering passage 3' inside, the tip of the welded linear part 5' is as shown in FIG.
Since it was only formed into a rod shape with approximately the same diameter as the welded linear portion 5', when the meandering passage 3' was filled with air, a large load was applied to the welded linear portion 5', causing damage at this location. There was a problem that the front and back sheet-like bodies peeled off or tore.

[Purpose of invention]

The present invention was devised in view of these problems, and its purpose is to provide an air mat that can increase the strength of the tip of the welded portion through simple improvements.

[Disclosure of invention]

In the present invention, a bag-like body 2 is constituted by a sheet-like body 1 on the front side and a sheet-like body 1 on the back side, and both sheet-like bodies 1, 1 are separated from one side in the middle part of the bag-like body 2. The air mat A is welded in a substantially linear shape leaving at least one side end toward the other side to form a meandering passage 3 inside the bag-like body 2, the air mat A being welded in the substantially linear shape as described above. Welded linear part 5 at the tip of welded part 4
This air mat has a circular welded portion 6 at the tip having a larger diameter than the circular welded portion 6 at the tip, and a portion 9 that is not welded at the center of the circular welded portion 6. With this configuration, the above object can be achieved. I was able to achieve this.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The bag-like body 2 is composed of a sheet-like body 1 on the front side and a sheet-like body 1 on the back side. In the middle part of the bag-like body 2, both sheet-like bodies 1, 1 are welded in a substantially linear shape from one side end to the other side end, leaving a part of the other side end. The welded parts 4 are spaced apart at approximately equal intervals, and unwelded parts 7 are alternately formed at one end and the other end, as shown in FIG. 3 to constitute the air mat A. Reference numeral 8 denotes an air supply/discharge port, which is connected to an air supply unit such as a pump via piping so that the meandering passage 3 can be filled with air.
A circular welded portion 6 having a larger diameter than the linear welded portion 5 is formed at the tip of the welded portion 4 welded in the substantially linear shape. According to such a configuration, the tip circular welding part 6 having a larger diameter than the welding linear part 5 increases the tip welding creepage area, reducing the concentration of load at this location, and improving the welding. The strength at the tip of the linear portion 5 is increased. In such a case, as shown in FIG. 7, a non-welded part 9 is provided in the center of the circular welded part 6 at the tip, and the welded area is smaller than that of the comparative example shown in FIG. 6, and the heat distribution is good. The weldability of the circular tip welded portion 6 is improved.

FIG. 8 shows another embodiment of the air mat A.

That is, the upper sheet-like body 1 is disposed above the central sheet-like body 1, and the upper sheet-like body 1 is welded to the central sheet-like body 1 in a substantially linear shape with a gap between them. Thus, the central sheet-like body 1 and the upper sheet-like body 1 are connected in series, and both ends are closed to form an upper bag-like body 2 that can form a meandering passage 3 as a whole. It has been done. A lower sheet-like body 1 is disposed below the central sheet-like body 1, and the lower sheet-like body 1 is welded to the central sheet-like body 1 in a substantially linear shape with an interval. Thus, the central sheet-like body 1 and the lower sheet-like body 1 are connected in series, and both ends are closed, so that the lower bag-like body 2 can form a meandering lower meandering passage 3 as a whole.
has been configured. The welded parts 4 of the central sheet-like body 1 and the upper sheet-like body 1 and the welded parts 4 of the central sheet-like body 1 and the lower sheet-like body 1 are respectively positioned approximately at the center of the meandering passage 3 on the other side. There is. Then, the supply/discharge port 8 of the upper bag-like body 2 and the supply/discharge port 8 of the lower bag-like body 2
A pump 10 serving as an air supply device is connected in parallel to each of the pumps. An on-off valve 11 is provided in a piping section from the pump 10 to the upper bag-shaped body 2. The on-off valve 11 is a simple on-off valve that opens and closes an air supply path.

A large number of air outlets 12 are formed in the center of the meandering passage 3 on the upper surface of the upper bag-like body 2.

By opening and closing the opening/closing valve 11, air is supplied to the upper bag-like body 2 to inflate the upper bag-like body 2, or the supply of air is stopped and the upper bag-like body 2 is expanded. The aim is to expand and contract. In such a case, air is constantly supplied to the lower bag-like body 2 from the pump 10, and the lower bag-like body 2 is constantly inflated, and as the upper bag-like body 2 expands and contracts, the body The fulcrums that support the pine are alternately shifted by about half a pitch to create a pine surge effect. At this time, air is blown out from the air outlet 12 of the upper swollen bag-like body 2, which dries the body, and the stimulation caused by the air bulge also causes a pine surge effect. Moreover, the lower bag-like body 2 is constantly inflated, and can stably support the body and provide cushioning properties.

FIGS. 11 and 12 show other embodiments, and as shown in these figures, the form of the welded portion 4 can be modified in various ways. In FIG. 4, FIG. 8, FIG. 11, and FIG. 12, the black circle indicates the circular welded part 6 at the tip,
A white circle indicates an air outlet 12.

Note that the meandering passage 3 may be formed in a substantially comb-like shape.

[Effect of idea]

In summary, the present invention has a circular welded part with a larger diameter than the welded linear part at the tip of the welded part, so when the meandering passage of the bag is filled with air, the load is concentrated. The circular weld at the tip of the weld line has a larger diameter than the weld line, which can handle loads over a wide range, and can withstand loads sufficiently, and simple improvements can improve weld strength. It is possible to prevent the welded part from being damaged by increasing the welding temperature, and by providing a non-welded part in the center of the circular welded part at the tip, welding where the load is concentrated when air is filled in the meandering passage of the bag-like body is avoided. At the tip of the linear part, the circular welded part has a larger diameter than the welded linear part, so it can handle loads over a wide range and can withstand loads sufficiently. Since there is a part in the center of the large-diameter circular welded part that is not welded, the welding area can be reduced compared to the case where the entire large-diameter part is welded. This has the advantage of increasing welding strength.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the conventional example, Fig. 2 is a schematic sectional view of the same, Fig. 3 is an enlarged sectional view of the same, Fig. 4 is a plan view of an embodiment of the present invention, and Fig. 5 is a schematic sectional view of the same. A partially omitted schematic sectional view, FIG. 6 is an enlarged sectional view of a comparative example of the same as above, FIG. 7 is an enlarged sectional view of another embodiment of the same as above, and FIG. 8 is an overall plan view of yet another embodiment of the same as above. Figures 9a and 9b are explanatory diagrams showing the operation of the same as the above, Figure 10 is an explanatory diagram of the entire device of the same, and Figures 11 and 12 are plan views of other embodiments of the same, respectively, 1 is a sheet-like body, 2 is a bag-like body, 3 is a meandering passage, 4 is a welded portion, 5 is a welded linear portion, and 6 is a circular welded portion at the tip.

Claims (1)

[Scope of utility model registration request] The sheet-like body on the front side and the sheet-like body on the back side constitute a bag-like body, and in the middle part of the bag-like body, both sheet-like bodies are turned from one side of the bag-like body to the other side at least. An air mat that is welded in a substantially linear shape leaving either side end to form a meandering passage inside the bag-like body, and the welded linear part is attached to the tip of the welded part in the substantially linear shape. An air mat that has a circular welded tip with a diameter larger than that of the welded tip, and a part that is not welded in the center of the circular welded tip.