JPS6118777Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air mat that is placed in the seat bag of a vehicle seat and used as a lumbar support or the like.

A conventional air mat of this type is, for example, the one shown in FIGS. 1 and 2, which are substantially the same as those in British Patent No. 435,730. This air mat is constructed by stacking a first sheet material 1 and a second sheet material 2 made of plastic resin in a so-called symmetrical manner, and joining the peripheral edges 1a and 1b by high-frequency welding or the like. . In addition, 3 is an air supply pipe attached to the second sheet material with adhesive.

However, in such a conventional air mat, the peripheral edges 1a and 2a of the first sheet material 1 and the second sheet material 2 are overlapped and bonded,
There is a problem in that the joint portion 4 is easily peeled off.

That is, by supplying air from the air supply pipe 3,
As shown by the chain line in Fig. 2, when inflated, a strong tensile force acts on the joint 4 in the direction of arrow A, that is, in the thickness direction of the peripheral edges 1a and 2a, causing it to separate little by little, and eventually air is released. This will cause leakage.

This idea was devised by focusing on these conventional problems.The air mat is attached to the core plate by covering it from one side, and the joining part of the sheet material that makes up the air mat is attached to the core plate. It is an object of the present invention to solve the above-mentioned problems by adopting a configuration in which the device is restrained on the other side.

This invention will be explained below with reference to embodiments shown in FIGS. 3 to 6.

First, the structure will be explained. M is an air mat main body, and is constructed by bonding a first sheet material 5 and a second sheet material 6. In other words, the air mat main body M
is a first sheet material 5 formed in a shape that can be wrapped around the core plate P, which will be described later, from one side 7 side to the other side 8 side; The second sheet material 6 formed in the shape is
The lip portions 5b and 6b are stacked on top of each other in a so-called mating manner and joined by high frequency welding or the like. 9 is the connecting part.

10 is an air supply pipe attached to the second sheet material 6 of the air mat main body M. P is the air mat main body M
A hard resin core plate is fitted and attached. This core plate P has a hole 11 through which the air supply pipe 10 of the air mat main body M is inserted. Therefore, when attaching the air mat main body M to the core plate P, while inserting the air supply pipe 10 into the hole 11,
It can be installed by expanding and covering it.

S is a third sheet material with extremely low elongation that is adhered to the lip portion 5b of the first sheet material 5 constituting the air mat main body M. As shown in FIG. 6, when this sheet material S is inflated by supplying air to the air mat main body M, the sheet material S is arranged so that its joint portion 9 does not protrude from the other surface 8 side of the core plate P. It is for restraint. 12 is a joint portion of the third sheet material S.

Note that this third sheet material S may be adhesively fixed to the core plate P, if necessary, so as not to move.
Alternatively, it may be configured to adhere to the lip 6b of the second sheet material 6.

Next, the effect will be explained.

In Fig. 5, when air is supplied from the air introduction pipe 10, it expands as shown in Fig. 6, and the second sheet material 6 of the air mat body M tensions the third sheet material S, and at the same time, It will continue to grow from.

Therefore, the joint part 9 of the air mat main body M comes into close contact with the other surface 8 of the core plate P while being restrained by the third sheet material S, and the first sheet material 5 and the second sheet near the joint part 9 The materials 6 also overlap from the other surface 8 to the peripheral edge of the core plate P and are tightly adhered to each other.

As a result, the stretching force acting on the second sheet material 6 due to the expansion of the air mat main body M acts on the joint portion 9 of the air mat main body M as a tensile force in the direction of arrow B, that is, in the direction of the adhesive surface. At the same time, the tensile force is reduced by the frictional resistance between the first sheet material 5 and the second sheet material 6 that are in close contact with the core plate P. The more the air mat main body M expands, the greater this frictional resistance becomes, and the above-mentioned tensile force is further reduced.

As mentioned above, this invention has a structure in which the connecting part of the air mat body placed over the core plate is restrained to the surface of the core plate on the opposite side from the side on which it is covered, so that when the air mat body is inflated, In addition, the tensile force acting on the bonded portion can always be applied in the direction of the bonded surface, making it difficult for the bonded portion to peel off. This can be reduced by the frictional resistance of the second sheet material.

Therefore, unlike in the past, there is no fear that the connecting portion of the air mat will easily peel off due to expansion and air leakage will occur, and the durability of the air mat can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional air mat, Fig. 2 is a cross-sectional view taken from Fig. 1, Fig. 3 is a perspective view of an air mat according to this invention, and Fig. 4 shows the opposite side of Fig. 3. FIG. 5 is a perspective view, FIG. 5 is a cross-sectional view taken from FIG. 3, and FIG. 6 is a cross-sectional view for explaining the operation of the air mat according to this invention. M... Air mat main body, P... Core plate, S... Third sheet material, 5... First sheet material, 8... Second sheet material, 5a, 6a... Opening, 5b, 6b...
Lip part, 7...one side, 8...other side, 9...joint part, 10...air supply pipe.

Claims (1)

[Scope of utility model registration request] A first sheet material having an opening that can be wrapped over the core plate from one side to the other side, and a second sheet having an opening that can be wrapped over the first sheet material from above. the material at the lip of each opening,
An air mat main body formed by using this as a joint part is attached to cover the core plate from one side thereof, and the first sheet material is exposed on the other side;
Alternatively, a third sheet material that restrains the joint portion of the air mat main body to the other side of the core plate is coupled to the lip portion of the second sheet material, and the third sheet material, the core plate, and the first sheet material are connected to each other. 1. An air mat characterized in that the air mat is configured such that air is introduced into the air mat main body by making a hole in the air mat and inserting an air supply pipe thereinto.