JPH034285B2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention is directed to a closed type drum can formed by winding and connecting a top plate and a base plate to a cylindrical body plate. For reuse, the previously stored chemical solution should be thoroughly cleaned to prevent it from mixing with the next stored chemical solution, and the chemical solution should be completely cleaned without any risk of affecting or deteriorating the next stored chemical solution, etc. To provide a means for sealing and adhering the body plate, the top plate, and the base plate so that they can be washed.

``Prior art'' Conventionally, drum cans for storing chemicals, etc. have been divided into open type drum cans in which the top plate is free and not integrated with the body plate, and closed type drum cans in which both the top plate and the base plate are wound and bonded to the body plate. Among all types of drum cans, open type drum cans are not sealed, but only the body plate and base plate are rolled and glued, and the top plate and body plate are not tightly attached. Since it is a type of drum, the wound adhesive part can be treated in any way from the inside without any problems, but in a closed type drum can,
Since both the top plate and the base plate are wound and bonded to the body plate in a sealed manner, it is almost impossible to process the inner surface of the area where the windings are bonded, especially the bonded area between the base plate and the body plate.
In particular, in the past, there were many drum cans made of iron plates, which had low durability, so there were few problems with reuse, but recently, durable and expensive drum cans made of stainless steel have been widely used, so the previous chemical The drum cans containing chemicals, etc. had to be cleaned and used again. In cases where the top plate or base plate is simply wound and bonded to the body plate, there is a shallow annular space 〓a between the circumference of the top plate and the upper end of the body plate. At the same time, the shallow part (a) continues upward in a wound shape to form the deep part (b) of the wound part, and once the chemical liquid etc. stored in the previous time seeps into the part (2), the drum Even if you wash the inner surface of the can by injecting cleaning liquid through the narrow opening, it will not be possible to completely clean it, and in particular, it will almost never be possible to wash out chemical liquids that have penetrated into the deep spaces. As it is,
In addition, in the winding bonded area between the main plate and the body plate, there is a continuous shallow annular space 〓a′ and downward that inevitably occurs in the bonded area between the top plate and the body plate. If the previous chemical solution, etc. intrudes into the deep space between the windings, etc., and the lower end of the winding deforms due to impact with other objects, especially in products that are frequently used,
The deep part 〓b′ tends to further expand,
Correct spaces: Chemicals that have once penetrated into a, b, a', b', etc. cannot be completely removed by simple cleaning, and no matter how carefully you clean them, they will not be able to be cleaned next time. When storing chemical liquids, etc. in the drum can, the previous chemical liquid may infiltrate and mix with the newly stored chemical liquid, damaging its performance, and most of the chemical liquids with scents are delicate. This makes it completely unsuitable for cleaning and reuse.

``Problems to be Solved by the Invention'' As mentioned above, when reusing the drum can of a closed type drum, it is necessary to completely remove the chemical liquids previously stored during cleaning. , b', etc. It is an object of the present invention to provide a means for sealing and adhering the body plate, the top plate, and the base plate such that there is no possibility that new chemical solutions or the like will leak into the body.

In addition, a method such as Japanese Patent Application Laid-open No. 57-62827 is also known, but it increases the number of windings and inserts a sealant between the windings. However, this type of sealant does not have the property of being able to withstand all the chemicals that should be stored in the drum can; in fact, many of them have poor resistance, so it is difficult to store certain types of chemicals. In such cases, the sealant will elute and contaminate the stored items, as well as create gaps between the shallow and deep parts of the winding part.
During this time, there is a risk that the stored chemicals will seep into the next stored chemicals and contaminate them, making them unsuitable for storing harsh chemicals. Next, JP-A No. 56-151655 is also known, but there is a gap between the shallow part and the deep part in the winding adhesive part.
etc., and the chemicals used last time have seeped into the space and cannot be completely washed away, and if another chemical is stored next time, there is a risk of contamination. However, there are drawbacks that make it unsuitable for use as a drum can for storing chemicals.
Furthermore, a method such as Utility Model Application Publication No. 57-200368 is also known, but this is not a container such as a drum, but a rotating body, so the object of the invention is fundamentally different, and the seaming process itself is completely unknown. This technology is merely a matter of utilizing this technology, and cannot be used as a drum can for storing multiple rotations of chemicals.

``Means for Solving the Problems'' In the present invention, there is no annular groove-shaped shallow portion 〓a, a′ between the winding joints between the body plate, the top plate, and the base plate. At the same time, due to continuous winding, the communication between the deep parts (b, b') and the inside of the drum is cut off, and there is a risk that the previous chemical solution, etc. may infiltrate into the deep parts (a, b, a', b', etc.). Make sure that there are no gaps between a, b,
This eliminates the risk of previous chemical solutions leaching out from a', b', etc., and allows for complete cleaning with simple and ordinary cleaning, so that there is no problem with reuse. The long-lasting stainless steel drum can can be reused for a long time without any problems.

"Embodiments and Effects" A detailed explanation will be given with reference to the accompanying drawings showing an example of implementing the present invention.

Reference numeral 1 denotes a body plate of a closed type drum can, which is generally a known component. 2 is a top plate and the opening of the top plate is 1
5, and its outer periphery is wound and bonded 10 to the upper end of the body plate 1 in a known manner. A is the space between the annular shallow portions between the body plate 1 and the top plate 2 formed by the winding bonding. Macroscopically, there seems to be no continuity between the interval b, which is a deep part that continues upward from a, but microscopically, there is a slight gap intermittently.
exists continuously, and between this deep
has a tendency to gradually deform and expand due to impact on other objects during use. Reference numeral 14 is used to perform overlay welding to fill and eliminate the annular shallow space 〓a created by the winding bonding between the top plate 2 and the body plate 1. The welding member can be inserted and operated easily, and it breaks the continuity between the deep gap (b) created by the winding adhesive and the drum inner cavity 4, and the inside of the drum between (a) and (b). The chemical solution stored in the container will never enter the container. Next, reference numeral 3 is a main plate, the outer periphery of which is bent downward at a substantially right angle, and the outer periphery of the bent portion 5 has a diameter that is inscribed in the inner surface of the body plate 1.
Reference numeral 11 denotes a wound bonding portion between the bent end of the main plate 3 and the lower end of the body plate 1. Reference numeral 16 denotes a portion where the base of the winding adhesive portion is seam-welded from outside the can over the bent portion 5 of the base plate and the lower end of the body plate 1, and both are welded together. The wound adhesive part 11 between the base plate 3 and the body plate 1 does not have a shallow annular recessed part 〓a' at the inner corner thereof, and has a substantially right-angled corner c without a recessed interval 〓. In addition, there is a seam 〓b' between the approximately right-angled corner c and the deep portion 〓b' in the winding adhesive part 11, but there is no seam 〓b'. Since there is an intervening part 16, there is no intervening part between the distribution lines,
Since the stored chemical solution does not penetrate into the area (b') deeper than the corner (c), there is no need to wash out the chemical solution, etc. in the area (b') during cleaning, and it is easy to use. Therefore, even if 〓b' is slightly deformed during this time, the previous chemical solution has not penetrated, so there is no risk of it getting mixed into the new stored solution.

``Effects'' The present invention has the above-described configuration, and there is no annular shallow recess space 〓a, a′ in each winding bonded portion between the body plate 1, the top plate 2, and the base plate 3. Even if the deep winding spaces b and b' exist, they are disconnected from the body cavity 4 in the drum can, so the stored liquid will infiltrate into the winding spaces b and b'. I have no concerns. Therefore, when cleaning the inside of the drum in order to use up the chemical solution stored in the drum last time and reuse it next time, it is necessary to wash the inside of the drum between the complicated shallow and deep parts (a, b, a', b', etc.). Because there is no chemical solution, even if it is simply cleaned, the previous chemical solution will not remain anywhere inside the drum, and it can be easily and completely cleaned. There is no fear of deterioration etc.
Even high-grade drum cans made of stainless steel can be easily converted and used frequently, and with the completion of this invention, high-grade stainless steel drum cans can be used repeatedly to store chemicals, including cases where high-grade stainless steel drum cans are used to store chemicals. The effect is truly remarkable as it has led to the elimination of chemical changes.

[Brief explanation of the drawing]

The attached drawings show an example of the implementation of the present invention, and FIG. 1 is a perspective view of the entire drum can, and FIG. 2 is a perspective view of the entire drum can.
3 is a sectional view of a conventional product. 1... Body plate, 2... Top plate, 3... Base plate, 4...
Inner cavity, 5... Bent part, 10, 11... Winding adhesive part, 14... Overlay welding part, 15... Mouth of top plate, 1
6... seam welding part, a, a'... between the shallow parts of the annular shape, b, b'... between the deep parts of the winding adhesive part, c... the approximately right-angled corner.

Claims (1)

[Scope of Claims] 1. A welded overlay closure part is formed in a shallow annular gap formed in the drum can at the winding joint between the upper part of the cylindrical body plate and the outer periphery of the top plate of the closed type drum can. At the winding joint between the lower part of the body plate and the outer periphery of the main plate, a substantially right-angled downward bent part is provided on the outer periphery of the main plate, and an integral seam is welded to the bonded area between the body plate and the main plate. A closed type drum can characterized by having a section. 2. The outer periphery of the top plate of a closed type drum can is wound and glued to the upper end of the body plate in a known manner, and a shallow annular space is created inside the drum case by the winding and adhesion of the body plate and the top plate. Insert a welding member from the open end of the lower end of the body plate and perform overlay welding to remove the filling, then wrap and bond the outer periphery of the base plate to the open end of the body plate, and bond the rolled and bonded part. A method for manufacturing a closed type drum can, characterized in that the outside is integrally seamed.