JPH02178523A - Assembly construction of oil tank - Google Patents

Abstract

PURPOSE:To improve the sealing performance by a method wherein the edges of a bottom plate and a shell plate are overlaid with each other, a curling bend is formed by press work, and vertical raised parts and slanting parts, which are formed continuously to the raised parts, form an acute angle. CONSTITUTION:The edge of a nearly horizontal bottom plate 1 is extended in the slanting down direction to form a slanting part 1', and the end of the slanting part is vertically bent up to form a raised part 1''. The edge of a nearly vertical shell plate 2 is extended in the slanting down direction to form a slanting part 2', and the end of the slanting part is vertically bent up to form a raised part 2''. The slanting part 2' and the raised part 2'' of the shell plate 2 are tightly laid over the slanting part 1' and the raised part 1'' of the bottom plate 1, and the the raised part 1'' is longer than the raised part 2''. The long raised part 1'' is bent towards the slanting part 2' of the shell plate 2 to form a curl bend part 1''', and the end of the bottom plate 1 is located at a position lower than the end of the shell plate 2. Then, the raised parts 1'' and 2'' are pressed towards the slanting part 1' and 2' to form an approximate double seaming structure, so that the sealing performance is improved. The sealing work for the edges of the bottom and shell plate is made by using a press machine.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an assembly structure for fixing end surfaces of a top plate and a bottom plate that form an oil storage space of a tank.

[Conventional technology]

An oil storage space is formed by extending the ends of the top plate and bottom plate of the oil tank laterally and fixing the ends in a liquid-tight manner. Conventionally, as a fixing means, a structure is known in which the overlapped ends are seamed while remaining in a superposed state. (
(Refer to Utility Model Publication No. 36-12963) Also, the seaming process has the disadvantage of requiring special tools and equipment, so a seam welding machine is often used to secure the overlapped ends by seam welding. structure is known. (Refer to Utility Model Publication No. 38-17478) Instead of full-fledged seaming, apply a sealant to the end surface that overlaps with the l
A structure in which the paper is folded back into a letter shape and crimped is known. (Refer to Utility Model Publication No. 42-14300) [Problems to be solved by the invention] Full-scale seaming requires special tools and equipment, and therefore seam welding is used as a structure for easy assembly. structure became common.

However, in the case of tank bottom and top plates made of thin plates, seam welding tends to cause the entire end faces that are in close contact with each other to melt and become soft during welding, which can disrupt the dimensional accuracy of the bottom plate and top plate, making it difficult to create high-precision oil tanks. There is a problem with this.

On the other hand, as a structure that maintains oil tightness by taking advantage of recent improvements in the performance of sealants, a structure has been implemented in which one end of the top plate and bottom plate of an oil tank that are in close contact with each other is folded back into a U-shape and crimped. Although this structure can be easily manufactured using a press machine, it is difficult to press the entire circumference of the oil tank with uniform force, and due to variations in processing, it may become impossible to maintain a complete airtightness with the sealant. there were.

[Means for solving problems]

This invention relates to an assembly structure that can be implemented by a press machine as a sealing structure for the ends of a top plate and a bottom plate forming an oil storage space of an oil tank.
1# is an inclined portion extending diagonally downward from the end of the bottom plate 1, and 1# is a rising end obtained by folding back the tip of the inclined portion 1' vertically. Further, 2 is the upper plate of the oil tank having a substantially vertical portion, and 2' is the upper plate 2.
The sloping part 2'' extends diagonally downward from the end of the slanted part 2', and is the rising end obtained by folding back the tip of the sloping part 2' vertically.

The sloped end 1' of the bottom plate 1 and the sloped end 2' of the top plate 2, and the rising end 1'' of the bottom plate 1 and the rising edge 2'' of the top plate 2 are closely overlapped, and the rising ends are The rising end 1'' of the bottom plate 1 is set longer than the rising end 2' of the top plate 2.The longer rising end 1# has a curled portion 1'' toward the inclined end 2' of the top plate 2. is forming. Therefore, the tip of the bottom plate 1 (the tip of the curled part 1'') is at a lower position than the tip of the top plate 2 (the tip of the rising end 2'), and in this state, both the upper ends 1'' and 2
'' toward the inclined portions 1' and 2' and press-bond them, a pseudo seaming-like structure is created.

In this state, the tip is folded in further than in the conventional case where the end face is folded back into a U shape and crimped, so that even if there are variations in processing during crimping, the sealing performance is significantly improved. Also, if insufficient crimping is expected due to press capacity, etc.,
It can be completely sealed by applying a sealant and pressing it as before.

3 is a curved part 1'' of the tank bottom plate 1 and the tank top plate 2 in order to improve adhesion when insufficient crimping is expected.
It is a low viscosity adhesive that is filled and adhered between the inclined parts 2' of The applied low-viscosity adhesive penetrates and fills the gap between the curled portion 1'' and the inclined portion 2', and can be completely sealed.

[Explanation of action]

Since the structure is as described above, the oil tank top plate 2 and the oil tank bottom plate 1 before being curled can be formed by press working, and the curled part formed at the tip of the vertical rising end 1' can be formed by pressing. 1''' can be formed by press working with a curl bending die, and the sloped part 1'
2' and the rising ends 11 and 2' form a shallow angle, so they can be easily crushed by press working lζ. For this reason, the shape in which the tip of the end face that extends horizontally is rolled up, as in seaming, can be done entirely by press work, and many crimping surfaces can be formed between both end faces, resulting in a marked improvement in sealing performance. It is something.

Also, compared to the case where one end is folded back into a U-shape and the other end is crimped, the thickness of the curled part 1"' when crimped is the thickness of three thin plates, and the curled part 1"' and inclined part 2'
The triangular space that can be formed between the two has become larger. For this reason, if a low-viscosity adhesive 3 is applied to this space before painting, the amount of adhesive 3 that adheres is large and the viscosity is low, so the gap between the curled part 1'' and the inclined part 2' is Since it is easily filled with the resin, the sealing performance between the end faces of the top plate 2 and the bottom plate 1 is excellent, and this can be handled by post-processing.

[Explanation of effects]

As described above, instead of the conventional seaming work that requires a special dedicated tool, in this invention, the bottom plate 1 and the top plate 2 of the oil tank are formed by press working, and then the end faces are overlapped and curled. The work of forming part 1'' was performed by press working, and the inclined parts 1' and 2 were formed continuously with the vertical rising ends 1# and 2#.
Since the angle ' is formed at a shallow angle, it was possible to press the rising ends 1'' and 2'' to the inclined parts 1' and 2' using a press.

For this reason, the top plate 2 and bottom plate 1 of the oil tank can be formed by pressing even if the end faces are rolled up, such as by seaming. For example, while the oil tank material is moved by a transfer press, (ζThe top plate 2 and the bottom plate 1 are assembled into a sealed structure, making it possible to manufacture the oil tank quickly and easily.

In contrast to seaming, which requires special equipment and tools, the present invention uses a press type that can be easily manufactured, and requires very little investment in equipment during installation.

In addition, since the connection between the top plate 2 and the bottom plate 1 of the oil tank is made by making surface contact between the end faces, there is no dimensional deviation at all, and the accuracy is much higher than when manufacturing by seam explosion welding. It is a practical invention with high sealing reliability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main part of this invention, FIG. 2 is a sectional view of the main part before finishing pressing, and FIG. 3 is a sectional view of the oil tank. 1...Oil tank bottom plate 1'...-...Slanted part 1"...Rising end 1"...Curled part 2...Oil tank Upper plate 7... Inclined part 2''... Rising end 3... Adhesive

Claims (2)

[Claims] (1) An oil tank bottom plate 1 is provided, which has an inclined part 1' bent diagonally downward on the end face of the bottom plate having a substantially horizontal part, and an upright end 1'' made by folding the tip of the inclined part 1' vertically. , and an oil tank top plate 2 provided with an inclined part 2' bent diagonally downward on the end face of the side plate having a substantially dripping part, and an upright end 2'' made by folding the tip of the inclined part 2' vertically. The length of the rising end 1'' of the oil tank bottom plate 1 is set longer than the length of the rising end 2'' of the oil tank upper plate 2, and the upper ends 1'', 2'' and the inclined portion 1'
2' are tightly overlapped, and the end of the vertically extending long rising end 1'' forms a curled bending part 1'' toward the short rising end 2'', and the coexisting upper ends 1'' and 2'' are An assembly structure of an oil tank characterized in that the curled portion 1'' is crimped together with the inclined portions 1' and 2'. (2) Curled portion 1″ of tank bottom plate 1 and tank top plate 2
An assembly structure of an oil tank characterized in that a low viscosity adhesive 3 is filled and adhered between the inclined part 2' of the oil tank.