JPH0721333U - Welded structure of closed container - Google Patents

Abstract

(57) [Abstract] [Purpose] Water-resistant packing is attached to the inside of the welded part of the nylon (trade name) hermetic container formed by vibration welding, and the welded part is shielded from water in the hermetic container. Prevents the welded part from deteriorating due to the hydrolysis of nylon. [Structure] Rib 9 provided on the periphery of the nylon body 2
The top surface is pressed against the peripheral edge of the nylon cover 3 to form the sealed portion 1 as the welded portion 6. A waterproof rubber packing 7 is attached to the inside of the welded portion 6 and is sandwiched between the body 2 and the cover 3 so as to be liquid-tight from the inside of the closed container 1. Therefore, the welded portion 6 will not be hydrolyzed by the water inside and will not be damaged or leaked.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a welded portion protection structure for a sealed container made of nylon (trade name, the same applies hereinafter) formed by heat welding.

[0002]

[Prior art]

 Conventionally, a closed container made of nylon, for example, a reserve tank for cooling water of an internal combustion engine, has a box-shaped body having an open end and a plate-shaped cover, and their peripheral portions are thermally welded to each other. . As a method of heat welding, there is used a method such as vibration welding in which heat is generated by friction, a rib as a melting margin is provided in the welded portion as is well known, and a groove or a rising edge for preventing protrusion of melted burr is used. Is provided.

[0003]

[Problems to be solved by the device]

 When the conventional nylon sealed container as described above is filled with cooling water (LLC), for example, the welded portion is exposed inside the container and directly comes into contact with water. It deteriorates and its strength decreases. If the deterioration progresses, the welded part will be damaged by heat and pressure, resulting in an accident such as liquid leakage. Hydrolysis of nylon does not pose a practical problem on the wall surface of general containers, but the deterioration of the material at the welded part is particularly rapid.

[0004]

[Means for Solving the Problems]

 A water-resistant elastic packing is placed inside the heat-sealed portion of the body and the cover that form a nylon tight-fitting container, and it is liquid-tightly sandwiched between the body and the cover. It cuts off the flow of water.

[0005]

[Action]

 When the inside of this sealed container is filled with water, the welded part is protected by the packing and does not come into contact with water, so the deterioration of the material due to hydrolysis does not occur, and the strength of the welded part caused by water No decrease occurs.

[0006]

【Example】

 An example is shown in FIG. Nylon body 2 and cover 3 have their peripheral portions 4, 5 welded by vibration welding to form closed container 1. In this example, the closed container 1 is a reserve tank for cooling water (long life coolant, LLC) of an automobile engine. A welded portion 6 is formed at the joining portion of the peripheral edge portions 4 and 5, and a packing 7 is arranged inside thereof. The packing is an O-ring 7 made of synthetic rubber, and is elastically sandwiched between the body 2 and the cover 3 at the peripheral edges 4, 5.

As shown in FIG. 2, the O-ring 7 is compressed in the direction of the arrow 8 and is in liquid-tight contact with the body 2 and the cover 3. The shapes of the body 2, cover 3 and O-ring 7 before vibration welding are shown in FIG. The peripheral portion 4 of the body 2 is provided with a rib 9 that melts at the top to form a welded portion 6 and an inner peripheral rib 10 that serves as a guide for holding the O-ring 7 inside the O-ring 7. It An outer peripheral rib 11 for receiving a burr is provided on the outer periphery of the peripheral portion 5 of the cover 3. The cover 3 may not have a plate shape as shown in FIG. 1, but may have a box shape having an opening edge facing the body 2. When the body 2 and the peripheral portions 4 and 5 of the cover 3 are butted against each other and pressed in the direction of the arrow 12 for vibration welding, the tops of the ribs 9 are melted as burrs 13 and 14 and flow out as shown in FIG. While being formed, the melted burr 13 is prevented from protruding by the outer peripheral rib 11, and the melted burr 14 is prevented from protruding by the O-ring 7. Further, the O-ring 7 is sandwiched between the body 2 and the cover 3 by being compressed by the arrow 8.

In this way, since the means for liquid-tightly blocking the inside of the welded portion 6 forming the container wall of the closed container 1 is taken, when water is injected from the injection port 15 of the closed container 1 to fill it, Since the welded portion 6 is protected by the O-ring 7 and does not come into contact with water, the deterioration phenomenon due to hydrolysis does not occur.

[0009]

As described above, according to the present invention, the welded portion for forming the closed container is liquid-tightly protected by the packing inside so that the welded portion is not deteriorated by contact with water in the closed container. Therefore, damage or liquid leakage due to the decrease in strength does not occur.

[Brief description of drawings]

FIG. 1 is a sectional view of an example.

FIG. 2 is a sectional view of a main part of the embodiment.

FIG. 3 is a cross-sectional view showing a shape of a main part before welding in an example.

[Explanation of symbols]

 2 Body 3 Cover 4, 5 Edge 7 Packing 9 Rib

Claims (1)

[Scope of utility model registration request] 1. In a welded portion structure of a closed container for liquid, which is formed by heat-welding a peripheral portion of a body made of nylon (trade name) and a cover, an annular water-resistant / elastic packing is provided inside the welded portion. A welded part structure of a hermetically sealed container, wherein the packing is liquid-tightly sandwiched between a body and a cover to block the flow of liquid between the inside of the hermetically sealed container and the welded part.