JPH0531064Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in a can that is provided with a ground plane that projects downward from the lower surface of the seamed portion of the bottom plate.

[Prior Art] Conventional general cans use the seamed edge of the bottom plate as a ground plane as shown in Figure 4, so
The seaming edges are prone to rust, and in order to solve this problem, as shown in Japanese Utility Model Publication No. 39-16198, a grounding surface consisting of a reinforcing ring that protrudes below the seaming part is installed around the inner wall of the seaming part of the bottom plate. There are known products that are directly fixed.

[Problem to be solved by the invention] In the can disclosed in the above publication, the ground surface is directly fixed to the seaming part as described above, so when liquid adheres to the ground surface, the liquid flows around the outer periphery of the ring. It is transmitted through the surface to the seaming part and has the potential to rust the seaming part.

Therefore, the present invention has been devised to prevent the liquid adhering to the ground surface from being transmitted to the seaming part, thereby preventing the occurrence of rust on the seaming part, which has been damaged and weakened by the seaming process. The purpose is to effectively prevent this.

[Means for Solving the Problems] To achieve the above object, the present invention includes wrapping the periphery of a bottom plate 2 having an arcuate cross section that bulges upward into the can body 1 around the lower end opening of the can body 1; In a pressure can in which the seaming part is provided with a grounding surface that protrudes downward from the lower surface of the seaming part, the means for forming the grounding surface adheres to the inner circumferential surface of the can body 1 by the seaming. the bottom plate part 3 facing upward, and the bottom plate part 3 facing the bottom plate part 3 in a spaced manner with a space 4 interposed therebetween;
A downwardly facing bottom plate part 5 connected to the top of the bottom plate part 5 via a folded part 6, and an arcuate bend projecting downward from the lower surface of the seaming part that connects the lower end of the bottom plate part 5 with the lower end periphery of the circular arc part 2a. The gist is to consist of Section 7.

[Example] Reference numeral 1 denotes a metal can body, and the periphery of a bottom plate 2 having an arcuate cross section that bulges upward into the can body 1 is wrapped around the lower opening periphery of the can body 1. In a pressure can of a type in which a ground plane is provided that protrudes downward from the lower surface of the seaming part, the ground plane includes an upwardly facing bottom plate part 3 attached to the inner circumferential surface of the can body 1 by the seaming process, and A downwardly facing bottom plate part 5 is connected to the top of the bottom plate part 3 through a folded part 6 and is opposed to the bottom plate part 3 with an isolation space 4 in between, and the lower end of the bottom plate part 5 and the lower end periphery of the arcuate part 2a. It is composed of a relatively large arc-shaped bent portion 7 that projects downward from the lower surface of the connected seaming portion.

[Effects of the invention] As described above, according to the present invention, the can is equipped with a ground plane that protrudes downward from the lower surface of the seamed portion of the bottom plate, just like conventional cans, but the ground plane of the present invention is particularly effective. According to the above, since a configuration is adopted in which a bottom plate part 5 facing upward is opposed to a bottom plate part 5 facing upward through a space 4 in an isolated manner, the space 4 serves to prevent liquid from coming into contact with the seaming part. It is possible to effectively prevent the occurrence of rust on the seam-fastened portion, which has been damaged and weakened by the seaming process.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view, FIG. 2 is a side view of essential parts of the same, FIG. 3 is an enlarged sectional view of the same, and FIG. 4 is an explanatory view of a conventional example. 1... Can body, 2... Bottom plate, 2a... Arc-shaped part,
3...Upward bottom plate part, 4...Space, 5...Downward bottom plate part, 6...Returning part, 7...Bending part.

Claims (1)

[Scope of Claim for Utility Model Registration] The periphery of the bottom plate 2, which has an arc-shaped cross section and bulges upward into the can body 1, is wrapped around the lower opening of the can body 1, and the lower surface of the wrapped portion In a pressure can provided with a ground plane that protrudes further downward, the ground plane forming means includes an upwardly facing bottom plate portion 3 attached to the inner circumferential surface of the can body 1 by the seaming process;
A downwardly facing bottom plate part 5 is connected to the top part of the bottom plate part 3 through a folded part 6 and is opposed to the bottom plate part 3 in a space 4 in a space 4, and the lower end of the bottom plate part 5 and the lower end of the arcuate part 2a. A can characterized by having an arc-shaped bent part 7 projecting downward from the lower surface of the seaming part communicating with the peripheral edge.