JPS6040942B2 - How to tighten the lid of a drum-shaped container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for tightening the lid of a drum-like container.

According to the current JIS standard, as shown in Figure 1, drum can 1
1.2 When dropped diagonally from skin height to the ground 2, the falling impact deforms the tightening part 5 between the body 3 and the lid body 4, and especially the corner parts 6, 6 loosen. However, it is required that the contents do not leak.

Furthermore, export standards that will be regulated in the future are expected to include diagonal falls from a height of three desks. By the way, as shown in FIG. 2a, as for the structure of tightening the body 3 and the lid 4 of the conventional drum 1, the terminal end 3a of the body 3 is folded outward by 180 degrees, and the inner surface of the chest 1 is Rising part 4
The flange part 4b of the lid body 4, which is iron-plated with the parts a, is connected to the terminal end part 3a.
Fold it back along, wrap the tip inside the terminal end 3a,
The rising part 4a of the lid body 4 has one layer, the flange part 4b has two layers,
The end portion 3a of the body 3 is wrapped in two layers, a total of five layers, and a sealant (rubber-containing emulsion) 7, 7 is filled in the gap at the tip of each seam.
There is a structure that is filled with

However, if this five-layer seaming structure is used, Figure 2b
As shown in FIG. 2, when the tightened portion 5 is deformed by the impact of the fall, the body 3 is separated from the rising portion 4a of the lid body 4 due to the bending, and the flange portion 4b of the lid body 4 is moved away from the body 3 due to the loosening of the outer end portion a. The sealant 7 at the tip 4c of the flange 4b becomes useless as the sealant 7 separates from the terminal end 3a, and there is a high possibility that the contents may leak.

In order to eliminate the drawbacks of such a five-layer seaming structure, for example, in Japanese Patent Publication No. 54-16958 (title of the invention ``Large capacity container having a seam joint and method D for forming a seam joint, the lid body 4, the flange part 4b of the body 3 is wound over 360 degrees, and the end part 3a of the body 3 is wound over 27 degrees, so that the rising part 4a of the lid body 4 has one layer, the flange part 4b has three layers, and the end edge part of the body 3 has one layer. Although it has been proposed to have three layers of 3a (7 layers in total), the method of tightening is very complicated.

The present invention has been made in view of the above-mentioned problems, and
The present invention provides a new 7-layer seaming method that can be tightened almost in the same way as the 5-layer seaming method, and is devised to prevent the entire seaming part from loosening due to drop impact.

In order to achieve such an object, the present invention provides a lid body in which the two-layer end portion, which is formed by folding the end portion of the body outward at an angle of 180 degrees and bringing them into close contact with each other, is curved outward and a sealant is applied to the inner surface of the flange portion. After iron-fitting the rising part of the body to the inner surface of the body, the two-layer end part of the body together with the flange part of the lid body is further folded outward by 1800 degrees, and the tip of the flange part is rolled inward to form the lid. One layer of the rising part of the body, two layers of the flange part, and four layers of the end part of the body were rolled and the applied sealant was rolled between each layer and filled into the gap at the tip of each seam, so that a total of 7 layers were seamed. A method for tightening a lid of a drum-shaped container is provided.

Embodiments of the invention will now be described in detail with reference to the accompanying drawings.

In the seaming method shown in FIGS. 5a to 5g, (1) as shown in FIG. Set for a sufficiently long time.

2) As shown in FIG. 5b, the end portion 10a of the body 10 is turned outward by 180 degrees and curled using the reciprocating first mold 11. {3' As shown in FIG. 5c, the curled end portion 10a is
are pressed from the width direction to form a two-layer end portion 10b.

(2) As shown in FIG. 5d, the two-layer end portion 10b is curved outward as it is by the reciprocating second mold 13.

[6- As shown in FIG. Apply it and let it dry.

Conventionally, sealant is applied by injection during the seaming process, but
If the amount was increased to completely fill the void, the emulsion would seep out to the outside, and if it was less, the sealing performance would deteriorate.

In this method, since pre-coating and drying is performed, it is possible to apply more eyelets than conventional methods, and it is possible to guarantee the necessary and sufficient amount for rolling between each layer and filling the voids at the ends of each seaming, which will be described later. .

Then, the rising portion 14a of the lid 14 is placed adjacent to the inner surface of the body 10. ■ As shown in FIG. 5f, the flange portion 14b of the lid body 14 is
At the same time, the two-layer end portion 10b of the body 10 is further folded outward by 180 degrees, and the tip of the flange portion 14b is rolled inward.

'71 As shown in Figure 5g, the third roller 1 is a rotating/pressing type.
7, the folded and rolled-up two-layer end portion lob and flange portion 14b are pressed from the width direction to flatten and adhere tightly.

As a result, the rising portion 14a of the lid 14 is wound in one layer, the flange portion 14b is wound in two layers, and the end portion 10a of the body 10 is wound in four layers, a total of seven layers.

In the process of this pressing and adhesion, the sealant 15 applied to the flange portion 14b is rolled between each layer and is further filled into the gaps 18a and 18b at the ends of each seaming.

Therefore, if a seaming structure as shown in Fig. 4a is formed by the above method, the fall impact and impact internal pressure will cause
The seaming portion 19 between the body 10 and the lid body 14 is such that the body 10 is separated from the rising portion 14a of the rhombus body 14, and the body 10 is further separated from the innermost end portion 10a of the body 10, as shown in FIG. 4b. However, an accident in which the fuselage 10 simply separates from the rising portion 14a of the diamond body 14 as shown in FIG.

However, the outer end a of the seaming portion 19 is
While the conventional one has a four-layer structure, the one of the present invention has a six-layer structure, so it maintains 1.5 times the coupling force and the separation remains small.

In addition, the two-layer end portion 10b of the fuselage 10 and the flange portion 14b of the rhombus body 14 are never brought into close contact with each other. this is,
In the conventional device shown in FIG. 2b, when the body 1 separates from the tip 4c of the flange portion 4b of the lid body 4, there is a large possibility that the tip 4c also separates from the terminal end 3a of the body 1. This is because, in the present invention, the tip end 14c of the flange portion 14b of the lid body 14 is held by the two-layer end portion 10b of the body 10 by being held from both sides.

Similarly, at the inner end b of the seaming portion 19,
The layer end portion 10b is held and held by the flange portion 14b of the lid body 14, and the tip portion 14c of the flange portion 14b of the lid body 14 is held by the innermost end portion 10a of the body 10, so that the above-mentioned The adhesion will not be broken by the impact force.

In this way, in the seaming portion 19, the close contact between the two-layer end portion 10b of the body 10 and the flange portion 14b of the lid body 14, and between the tip portion 14c of the flange portion 14b and the innermost end portion 10a of the body 10 is ensured. The sealant 15 rolled between each layer, the void 18a at the tip of each roll,
The sealant 15 filled in the sealant 18b can exhibit a stable sealing effect without impairing its sealing effect, and the contents will not leak.

Note that the sealant can be applied to the flange portion 14b of the lid body 14 by, in addition to the method shown in the example, (1) applying the sealant before molding and drying it, or (2) applying the sealant to the pre-dried material during the processing process. One method is to apply liquid sealant during the seaming process and dry it while heating and drying the external paint after seaming is completed. Either can be adopted.

As is clear from the above description, the present invention further includes folding the two-layer end portion formed by folding back the end portion of the fuselage together with a diamond-shaped flange portion formed by iron-plating the rising portion of the fuselage. The tip of the flange part is rolled inside, and the sealant is rolled between each layer and filled into the gap at the tip of each seam, for a total of 7
Since it is designed to be tightened in layers, it is possible to easily tighten 7 layers in almost the same way as the 5-layer tightening method, and the existing 5-layer tightening device can be used without major modifications. can.

In addition, due to the relative clamping action between the end of the two layers of the body and the flange of the lid, the tightened part will not separate or loosen even if it is subjected to a severe diagonal drop of 1.2 or more specified by JIS. Since this is less likely to occur, the sealing effect of the sealant is not impaired and leakage of contents is prevented.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the procedure and deformation state of diagonal drop, Figure 2 a
is a cross-sectional view of the conventional five-layer seaming structure, and Figure 2b is a cross-sectional view of the conventional 5-layer seaming structure.
FIG. 3 is a cross-sectional view of the seven-layer seaming structure of the foundation bolt, FIG. 4a is a cross-sectional view of the seven-layer seaming structure according to the present invention, FIGS. 4b and 4c is a sectional view of the deformed state shown in FIG. 4a, and FIGS. 5a to 5g are sectional views showing the main points of the seven-layer seaming method. 10...Body, 10a...Terminal part, 1
0b...Two-layer end portion, 14...Lid body, 14
a... Rising part, 14b... Flange part, 15... Sealant, 18a, 18b...
...Gap, 19...Tightening part. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. Fold the end of the fuselage outward by 180° and bring the two-layer end into close contact. Curve the end of the two layers outward, and fit the rising part of the lid with a sealant applied to the inner surface of the flange onto the inner surface of the fuselage. After aligning, the end portion of the second layer of the body together with the flange portion of the lid body is further folded outward by 180 degrees, and the tip of the flange portion is rolled inside, thereby forming the first layer of the rising portion of the lid body and the flange portion of the lid body. A lid for a drum-shaped container, characterized in that two layers and four layers at the end of the body are sealed by rolling a sealant applied between each layer and filling the gap at the tip of each seam to make a total of seven layers. How to wrap your body.