JPS584812Y2 - can - Google Patents

Description

[Detailed description of the invention] This invention relates to a can in which a metal end plate is wrapped around a bell body other than a metal body, such as a paper side or a synthetic resin type one body.

Conventionally, when attaching a metal end plate to a paper or synthetic resin bell body, the annular winding part formed at the periphery of the end plate was pressed against the outer wall of the bell and sealed in a recessed manner. , it was difficult to obtain sufficient airtightness.

The end of the lens barrel and the peripheral edge of the metal end plate are similar to the metal can,
- There was also known a structure in which the metal end plate was wound together, but in this case, the outer peripheral edge of the metal end plate bit into the bell body wall due to the seaming.
Since destructive phenomena such as cutting of the iron parts occur, it is necessary to strictly control the seaming pressure and force to avoid this, and there is also insufficient airtightness.

However, this idea forms an annular winding part at the tip of the peripheral edge of the metal end plate, and connects the peripheral edge of the metal end plate and the end of a bell body made of paper or synthetic resin other than metal. Since the can was constructed by seaming, it was possible to prevent the outer edge of the metal end plate from digging into the bell body wall, and it was also possible to securely tighten the seam, successfully creating a can with improved airtightness. .

That is, to explain this invention with reference to an embodiment, when fixing the metal end plate 2 to the end of the bell body 1 made of paper, the end of the bell body 1 and the peripheral edge of the metal end plate 2 are bonded to an ordinary metal. Similar to a can, they are rolled together to form an annular wrapped part 3, and an annular bent part 4 is formed at the tip of the peripheral edge of the metal end plate 2. It is interposed within the annular winding portion 3.

As shown in FIGS. 2 to 4, the metal end plate 2 has an annular collar 6 connected to the upper side of a rising wall 5 whose outer diameter is approximately equal to the inner diameter of the bell body 1. Prior to the tightening process, the tip edge of the annular flange 6 is wound downward approximately 3/4 times to form the annular bent portion 4 (Fig. 3), and then the outer edge of the annular flange 6 is bent downward. It is curved to form an annular curved portion 7 (Fig. 4),
The flange portion 8 formed at the end of the bell body 1 is inserted into the gap between the annular curved portion 7 and the rising wall 5, and the seaming process is performed.

According to the above implementation and example, the bell body 1 and the metal end plate 2 can be tightened without bringing the outer peripheral edge of the metal end plate 2 into contact with the bell body 1 sealing surface. A relatively strong seaming pressure can be applied to the annular seaming portion 3 while avoiding biting and destruction.

As a result, the metal end plate 2 is firmly fixed to the bell body 1.
In particular, the airtightness of the annular seam portion 3 is also improved.

Figure 5 (In the embodiment with three bells, similarly to the previous embodiment, the end of the synthetic resin bell body 1a and the peripheral edge of the metal end plate 2 are wound together to form an annular wrapped part 3. An annular bent portion 10 formed on the peripheral edge of the metal end plate 2 is interposed within the annular wrapped portion 3.

In this case, before the metal end plate 2 is tightened with the bell body 1a:
The annular bent portion formed on the tip edge of the annular collar 6 is compressed to form the annular bent portion 10 (Fig. 6), and then the annular bent portion 7 is formed in the same manner as described above (Fig. 7), and then the can is compressed. The flange portion 8a of the body la is wound tightly.

This embodiment also prevents the outer circumferential edge 9 of the metal end plate 2 from biting into the bell body wall and from breaking, and achieves the same effect as the previous embodiment. It also has the effect of being able to be formed thinly.

In the above example, a case was explained in which a can body made of paper or synthetic resin was used, but a □′ can body made of a material in which a synthetic resin film or metal foil is laminated on the surface of the above material can also be implemented in the same way. , and similar effects can be achieved.

That is, according to this invention, the can is constructed by forming an annular winding part at the tip of the peripheral edge of the end plate, and wrapping this end plate and the end of the can body made of paper or synthetic resin, etc. Even in cans made of paper wire, etc., the end plate and the can body can be firmly fixed together, and a highly airtight can can be obtained.

If the annular bent portion formed at the tip of the peripheral edge of the metal end plate is an annular bent portion, there is also the effect that the thickness of the tightened portion with the can body can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of an embodiment of this invention, Figs. 2 to 4 are partial sectional views showing the processing order of the metal end plate used in the embodiment of this invention, and Fig. 5 is a partial sectional view of the embodiment of this invention. FIGS. 6 and 7 are partial sectional views of other embodiments of the invention, showing the processing order (from the middle) of metal end plates used in other embodiments. 1.1a... Can body, 2... Metal end plate,
3... Annular winding part, 4... Annular winding part, 5... Standing wall, 6... Annular collar, 7
......Annular curved part, 8, 8a... Flange part, 9... Outer peripheral edge, 10... Annular bent part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a can whose bell body is made of a material other than metal, the end of the barrel and the peripheral edge of the end plate are fastened with four turns of the same number, and the tip of the peripheral edge of the end plate is tightened with four turns. A can characterized by having an annular winding portion formed at the bottom. 2. The can according to claim 1 of the utility model registration claim in which the annular winding part is a new annular part.