JP2556213Y2 - Flex tank bonding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding structure for a flex tank for enclosing and transporting a liquid or the like, and more specifically, to reduce the number of processing steps of the bonding portion and improve the reliability of the bonding portion. The present invention relates to a flex tank bonding structure.

[0002]

2. Description of the Related Art In recent years, when transporting food-related liquids such as drinking water, milk, soy sauce, etc., conventional tank trucks have waste on return flights. A flex tank using a thermoplastic resin or the like is used for transportation.

As shown in FIG. 4, for example, the structure of a joint portion of a main body of a flex tank 1 using a thermoplastic resin or the like includes one end 2a and the other end 2b of a rubber cloth 2 as shown in FIG.
Were polymerized for a predetermined length L, and a seam tape 3 made of resin was stuck to the polymerization portion inside the tank. As shown in FIG. 5, the structure of the end portion of the flex tank 1 is such that one end 2a and the other end 2b of the rubber cloth 2 are superimposed and a predetermined range H of the end portion is bonded by high frequency fusion. I was

[0004]

However, in the structure of the joint portion of the flex tank 1 described above, since the bonding portion X has a step, the seam tape 3 is bonded by high-frequency fusion. However, there has been a problem that much labor and time are required, and there are many variations in adhesion, and reliability cannot be obtained.

On the other hand, the structure of the end portion of the above-described flex tank 1 is such that one end 2a and the other end 2b of the rubber cloth 2 are simply superimposed and a predetermined range H of the end portion is bonded by high frequency fusion. As the water-stop structure of the terminal part, the peeling force is extremely weak, and the terminal part is easy to peel off when used under conditions where the stored liquid flows greatly during transportation. In addition, there is a problem that the terminal water stopping structure of the flex tank 1 for transporting liquid lacks reliability.

The present invention has been devised in view of such a conventional problem. In particular, in the structure of the joint portion of the body of the flex tank, it is possible to reduce the number of processing steps of the bonding portion of the rubber cloth and to perform bonding. It is an object of the present invention to provide a flex tank bonding structure in which the reliability of a part is improved.

[0007]

According to the present invention, in order to achieve the above object, the ends of the rubberized cloth at the joint portion of the flex tank are joined to each other, and a seam tape is disposed on the inner surface of the joining portion on the liquid side. In addition, the gist is that a reinforcing sheet is provided on the outside, and the reinforcing sheet and the seam tape are integrally fused together with the abutting portion therebetween to form a bag-shaped flex tank. In addition, this invention is based on the rubberized cloth at the end of the flex tank.
If you have a slack around the end near the end and turn it outward
In both cases, the vicinity of the terminal portion on the other end side is the folded portion on the one end side.
Turn it over so that it wraps around the end of the rubberized cloth
By fusing the surface and the vicinity of the terminal on the other end side,
At the end of the rubberized cloth
Outside the overlapped part between the near surface and the back side of the terminal on the other end
Integrates by applying seam tape on the surface and fusing
The gist is that they have been pasted together. In addition,
The idea is rubberized cloth at the joint of the body of the flex tank
Butts on the liquid side of this butted part
Seam tape is placed on the surface and a reinforcing sheet is placed on the outside.
And the reinforcing sheet and seam
And the end of the flex tank
The slack part near the end on one end of the rubberized cloth
Hold it and turn it outward, and near the terminal on the other end,
Fold back so as to enclose the folded portion on one end side, and
The end surface of one end of the rubberized cloth and the vicinity of the end on the other end.
By fusing together, and
Between the surface near the terminal on one end and the terminal on the other end.
Overlap the seam tape on the outside surface of the overlapped part with the back side and melt.
The gist is that they are attached together by wearing
It is.

[0008]

The invention is constructed as described above, and the seam tape is flexed by joining the ends of the flexible tank with the ends of the rubberized cloth so that no step is formed on the liquid side. It can be welded simultaneously when the tanks are welded, which eliminates the need for the process of attaching seam tape with an adhesive as in the past, which can reduce costs and reduce variations in adhesion. ,
The quality can be improved. Also this
Invented the rubberized cloth at the end of the flex tank
With a slack near the end on one end
At the same time, turn the vicinity of the terminal on the other end
Folded back so as to enclose the part, and one end of the rubberized cloth
By fusing the end surface and the end near the other end
And one end of the rubberized cloth.
Of the overlapping portion between the front surface near the end and the back surface of the terminal at the other end
The seam tape is superimposed on the outer surface and fused.
By physically bonding, the body of the flex tank
Receiving by sharing the tensile stress acting on the trick portion in the fusion range L ₂
Surface of the end of the rubberized cloth and the end of the other end
The fusion range L ₁ of the neighborhood, peeled off due to the flow of the liquid
Force can be prevented from acting. Therefore, liquid
As a bonding structure for the end of the flex tank for transportation
Reliable and effective.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a sectional view of a joint portion of a main body of a flex tank 1 embodying the present invention.
1 shows a cross-sectional view of the end portion of the flex tank 1. The joint portion of the body of the flex tank 1 shown in FIG. 1 abuts the end portions 2a and 2b of the rubber cloth 2, and the inside of the abutting portion Y, that is, the liquid side. A seam tape 4 made of resin is provided on W, a reinforcing strip 5 is provided on the outside, and the seam tape 4 and the reinforcing strip 5 are fused by a predetermined width h with a butt portion Y interposed therebetween. To form a bag-shaped flex tank 1.

As described above, the joint portion of the main body of the flex tank 1 abuts the end portions 2a and 2b of the rubber cloth 2,
By avoiding a step on the liquid side W, the seam tape 4 can be simultaneously fused when the flex tank 1 is fused.
The step of attaching the adhesive with an adhesive is not required, and the cost can be reduced.
The quality can be improved.

The end portion of the flex tank 1 shown in FIG. 2 has a slack portion Q near the end portion 2a of one end side 2a of the rubber cloth 2 and is turned outwardly. 2b is folded back so as to enclose the folded portion S on the one end 2a, and the end surface of the one end 2a of the rubberized cloth 2 and the vicinity of the end on the other end 2b are separated by a predetermined length. only fusion range L ₁ by high-frequency welding with is laminated integrally, the overlapping portion Y of the rear surface side of the terminal portion of the terminal portion near the surface and the other end 2b of the one end side 2a of the rubberized fabric 2 A seam tape 4 is superimposed on the outer surface, and a predetermined length of the fusion range L
₂ are bonded together by high-frequency fusion, and the tensile stress acting on the joint of the body of the flex tank 1 is reduced by the fusion range L ₂
In receiving and sharing, and the terminal portion surface of the one end side 2a of the rubberized fabrics 2, the fusion range L ₁ between the end portion near the other end side 2b, peel force due to the flow of the liquid is prevented from acting Things.

Therefore, the flex tank 1 for transporting liquid
It is highly reliable and effective as a bonding structure of the terminal section.

[0013]

[Effect of the invention] This invention is constructed as described above.
The seam tape can be fused at the same time as the flex tank is fused without any step at the joint portion of the body of the flex tank, thereby attaching the seam tape with an adhesive as in the past. The process becomes unnecessary,
In addition to reducing costs, there is less variation in bonding and the like, and quality can be improved. In addition, the number of processing steps for the rubber-coated cloth bonding part is reduced, and the reliability of the bonding part is improved. There is an effect that can be improved. In addition, there is an effect that the liquid can be transported with peace of mind, and a transport vehicle on the return flight can be effectively used.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a joint portion of a flex tank embodying the present invention.

FIG. 2 is a sectional view of a terminal portion of a flex tank.

FIG. 3 is a perspective view of a conventional flex tank.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is a sectional view taken along the line BB of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Flex tank 2 Rubberized cloth 2a One end side terminal part 2b The other end side terminal part 4 Seam tape 5 Reinforcement strip Y Butt part W Liquid side L ₁ Fusing range L ₂ Fusing range

Claims (3)

(57) [Scope of request for utility model registration] 1. A flex tank laminating structure in which a bag for storing a liquid is formed by laminating both ends of a flex tank made of a rubber cloth, The ends of the rubber cloth are butted together, a seam tape is provided on the inner surface of the butted portion that is on the liquid side, and a reinforcing sheet is provided on the outside, and the reinforcing sheet and the seam tape are sandwiched between the butted portions. A flex tank laminating structure characterized by being integrally fused to form a bag-shaped flex tank. 2. A flex tank composed of a rubberized cloth.
To form a bag for storing liquid.
In the flex tank laminating structure, one end of a rubber cloth at the end of the flex tank
With a slack in the vicinity of the terminal on the side
In the vicinity of the terminal portion on the other end side, the folded portion on the one end side is wrapped.
Turn it back so that it fits in
Surface and the other end side near the end by fusing
Near the end of one end of the rubberized cloth.
Outside table of overlapping part between the side surface and the back side of the terminal part on the other end side
By seam tape overlapping on the surface and fusing
Flex tank lamination structure characterized by lamination
Build. 3. A flex tank made of a rubberized cloth.
To form a bag for storing liquid.
In the flex tank laminating structure comprising:
The inner surface that is the liquid side of this butt
Seam tape and a reinforcing sheet on the outside
And the reinforcing sheet and seam
And the end of the flex tank
With a slack near the end on one end of the rubberized cloth
And fold it outward.
Fold back so as to enclose the folded part on one end side, and
The surface of the terminal on one end of the drawing cloth and the vicinity of the terminal on the other end
By bonding together, the rubber
The surface near the terminal on one end of the drawing cloth and the back of the terminal on the other end
Overlay seam tape on the outer surface of the overlapping part with the surface side and fuse
Framed together
Laminate structure of box.