JPS62146149A - Can drum for three piece can - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metal can body in which two lids are secured to the upper and lower openings, or a paper can body in which the upper and lower openings are sealed. The present invention relates to can bodies of three-piece cans such as can bodies, particularly adhesive can bodies formed from one blank metal cylinder and joined together with an adhesive.

BACKGROUND OF THE INVENTION Conventionally, adhesive can bodies have been formed by forming a blank into a cylindrical shape with four corners slightly notched diagonally, and polymerizing and bonding both ends of the blank with adhesive tape.

Therefore, when the can body joint is double-sealed by adhesive,
As shown in FIG. 13, inside the lid seaming structure, there is a lid between the two body members 21 of the joint part of the can body that is folded back as a body hook and the two body members 21 on the chuck wall side. material 2
2 mesh with each other, and a total of 7 plates are folded in the water flow direction of the cross section. As a result, in the seamed structure, a step corresponding to two plate thicknesses is created between the total plate thickness T of the so-called normal parts other than the joint part and the total plate thickness LT of the joint part.

Problems to be Solved by the Invention In the conventional adhesive can, due to the step at the joint, an excessive impact load is applied to the joint when the seaming roll passes during seaming II of the can body and lid. In addition, there was a drawback that the can body was easily destroyed. Furthermore, there was also a drawback that the seaming of the normal seaming portion near the stepped portion was loose. As a result, a leakage path is created between the fractured part of the joint and the loosely fastened part, which impairs the airtightness of the can body, and there is a risk that the contents may leak out.

The present invention has been devised in view of the above-mentioned circumstances, and is capable of completely preventing the adhesion of the can seal from being destroyed in the seaming part and improving the sealing ability of the seaming part. Its purpose is to hold can bodies.

Means for Solving the Problems In cases where there are very few or no steps at the joints, such as in bath cans or squeeze cans, the above-mentioned leakage phenomenon at the closing part is almost non-existent. Therefore, the smaller the step history of the joint, the less the tightening force applied to the joint, preventing breakage, and the less loose seaming of the normally seamed part near the step, improving the sealing performance. The present invention has been made with attention to this point.

The structure of the present invention for solving the above problem a will be explained based on drawings corresponding to embodiments.

The present invention provides a can body of a three-piece can formed by adhesively bonding one blank l, at least the joining edge 2.2' located in the lid seam or sealing part of the blank 1. On one side, there is a notch 4 where the body hook BH folds over.
The structure is such that it is adhesively secured by providing a.

In addition, the hydraulic joint edge 2 located in the seaming part or sealing part
If a notch 3 is further provided at the part that becomes the body hook, when the lid is seamed or sealed, the seaming or sealing thickness L-t of the can body joint will be smaller than the normal seaming part thickness t of the pond. A notch is provided at the location that will become the body hook of one joint edge 2 located in the lid seam part or sole part of the blank 1, which can be seamed or rolled with one sheet thicker than the can body material. 3,
A notch 4 is provided at the location where the body hooks of the hydraulic joint edge 2' are folded, and when the joint edges are joined with adhesive tape to form a can body, the joint portion located at the seaming part or the sealing part In this case, an asymmetrical notch is formed at the place where the body hook becomes and where the body hook folds (second (2)).
vinegar).

When the lid f is wrapped around the can body formed in this way,
The seaming wall portion of the lid fits into the notch 3 provided at the location where the body hook is to be formed, and the end hook portion 7 of the lid fits into the notch 4 provided at the location where the body hook is folded (Fig. 5). .

As a result, the seaming thickness of the joint part is only one sheet thicker than the four rolls in the pond area, compared to the previous case where the difference in level between the joint seam part and the normal seam part was 42 sheets. Gold, the eaves can be reduced to one plate thickness.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 to 5 relate to an adhesive can which is a first practical example of the present invention. In the figure, 1 is a blank for forming the body of a three-piece can.

When the blank 1 is formed into a can body and the lid is seamed, in order to prevent the joint part of the can body from expanding at the seaming part,
As shown in Fig. 1, the joining R2,2 of the blanks to be joined is
A notch 3.4 is provided at a location located at the can lid seaming portion. The notch 3 provided in the joining edge 2, which becomes the inner overlapping part when formed into the can body, creates a body hook BH (Fig. 5) when the can lid is tightened from a position exceeding approximately 1/2 of the joining width W. The notch is vertically cut out to a height of , and inclined from this position to the end edge position of the mating edge 2 which becomes the bent part 5 (FIG. 5) of the upper part of the body hook.

That is, the section %a (21st fi) which becomes the body hook is cut out to a position approximately equal to or more than 14 of the joining width. In addition, the notch 4 provided in the joining edge 2' which becomes the overlapping part of the outer cylinder 1 leaves a part which will become the body f 7 corresponding to the size of the notch 3, and the part which will become the body hook is folded back at the bottom thereof. The body hook is provided at the point C (Fig. 2) where the body hook is folded so that it will fit when folded.

After forming the notch 3.4 as described above, the B
The f'J tape 9.9' is applied and molded onto the can body, and the joining edge 2.2' is polymerized via the adhesive tape 9.9'.

As a result, as shown in Fig. 2, the position corresponding to the notch 3.4 of the body hook part a and the part C where the body hook overlaps It is thinner than the joint part by one plate thickness. In this figure, b indicates the radius, and the shaded area indicates the adhesive molecule zr.

When a lid is double-sealed to the can body formed in this manner by ordinary means, the seaming structure of the can body mating portion becomes as shown in Section 4.5. The joint edge 2, which is on the inside of the joint, is cut out where the body hook will be, and the part where it overlaps is left.On the other hand, the joint edge 2', which is on the side where the body hook will be, is notched. Since the part where it is left and folded is a notch, when the lid f5 is closed, the lid material 6 is blown into the notch, and the thickness L-t of the entire case part is 4th.
As shown in the figure, the thickness is equivalent to six +li plates, which is one thickness less than the plate thickness L-T of the conventional joint shown in FIG. Fifth
Figures (A) and (B) show the B-B lrr top view and C-C sectional view of Figure 4, and in Figure (A), the lid material 6 is shown.
A notch 4 in the joint edge 2 where the end hook portion 7 of the joint edge 2 overlaps outwardly.
In figure (B), it can be seen that the seaming wall 8 of the lid 6 is fitted into the notch 3 of the joining edge 2 that overlaps inside.

Figures 6 to 10 show examples of ponds according to the present invention, in which the present invention is applied to a paper can that is used for storage by sealing a paper lid to a paper body in the form of a general paper pot. .

FIG. 6 is a cross-sectional view of a paper blank 100 for forming the entire body of the paper can. The blank 10, like the blank 1 in the first embodiment, is provided with a cutout 13.14 at the location of the lid seal of the joint 11.12. The notches 13 and 14 are similar to the notches 3 and 3 in the metal can.
4, but in the case of this embodiment, the joint edge located on the outside] 1 has a notch 13 at the location d that becomes the body hook, and the joint edge 12 located on the inside has a body footer folded back. A notch 14 is provided at the overlapping location e.

The blank [O] with the notches provided in this manner is molded and the joint edge +1.12 is polymerized and adsorbed to form a can body. FIG. 7 shows the bonded state of the lid sole position of the bonded portion.

When the paper can body formed as described above is sealed with the lid 15 by a well-known method, the sealing structure a of the joint portion becomes as shown in Fig. 9.10. As a result, as in the case of double seaming of metal cans, the plate thickness at the joint is thinner by one plate thickness than the normal paper can joint seal lecture shown in Figure 15.16. There is.

Further, FIGS. 11 and 12 show examples in which the bonding area of the joint inside the seaming structure is increased in four gold cans.

In this embodiment, only the notch 20 corresponding to the notch 4 of the outer joint edge 2 shown in FIG. 1 of the first embodiment is provided in the joint portion, and no cutout is provided in the inner joint edge. do not have. Therefore, the seaming structure of the joint where the lid is seamed is as shown in Fig. 12, where the part corresponding to the cross-sectional position of C-C in Fig. 4 has a thickness of 7 sheets, and the part corresponding to the cross-sectional position of B-B in Fig. The corresponding part has a thickness of 6 sheets, and the part corresponding to the normal seaming part has a thickness of 5 sheets.
The thickness of each sheet becomes step-like. In this example, since the notch is not fully used at the inner 1111+11 joint edge, there is an advantage that the sound repellent strength is higher than in the first example, but a part of the joint part is thicker than in the first example. There are drawbacks. However, since the area where the seaming thickness of the joint increases is smaller than that of the conventional joint, the impact load applied to the joint when the seaming roll passes is correspondingly small.

Effects of the Invention Since the can body of the present invention has a grooved bottom as described above,
Since the winding thickness or seal hammering of the joint of the can body is less than the conventional one by the amount of the can thickness - the thickness of the can H, it is possible to reduce the thickness of the seaming or sealing of the seal and the can body joint by that much. The height difference between the joint and the joint is smaller than the conventional one, and as a result, when the rolling roll passes during the winding process, it is possible to prevent the bond from being completely destroyed due to excessive f-equilibrium impact load being applied to the joint. In addition, since there are few steps in the tightening part, it can be tightened uniformly and tightly, and there are no defects in tightening as in the conventional case. Therefore, it is possible to prevent the airtightness from being broken at the joint portion of the tightening part, which was a problem with conventional adhesive values, and it is possible to obtain an adhesive value that ensures complete sealing.

Furthermore, since the width of the joint of the can body, which corresponds to the seaming position, is much smaller than that of the conventional can, 7-lunge machining, neck-in machining, and seaming machining can be easily performed.

As described above, the can body of the present invention has various remarkable effects compared to conventional can bodies.

[Brief explanation of drawings]

No. 1 to 5 show an actual example of the present invention, No. 11y4 is a blank M side ('4, Fig. 2 is a part of the joint part of one can, P- side view, Figure 3 is a partial front view of the can body with the lid fastened, Figure 4 is the A-A cross section of Figure 3,
Figure 5 (a) is a sectional view taken along line B-B in Figure 4, and (b) is a cross-sectional view taken along line C- in Figure 4.
C sectional view and Figures 6 to 10 show the present invention applied to a 3-piece paper can.
An example of an actual image for commercial use, Figure 6 is a blank 1,000-sided drawing,
Figure 7 shows the 1@+ side of the can body joint (A% Figure 8 is a front view of the lid sealed to the can body, and Figure 9 is the D-
D sectional view, whistle figure 10 (a) is the 91st E-EIlfr sectional view, (b) is the same CC sectional view,! Figures 11 and 12 show further embodiments of the present invention, Figure 11 is a partial cross-sectional view of the joint of the can body, and Figure 12 shows the can body in Figure 11 with the lid fully tightened. Fig. 13 is a cross-sectional view showing the seaming structure of the joint part, and Fig. 13 shows the entire conventional example. Fig. 15 is a sectional view of the seal structure of the paper can body joint;
FIG. 6 is a sectional view taken along line )1-H in FIG. 15. 1.10 Ni blank 2.2', 11.12: Joint edge
3.4.13.14.20: Notch 5: Bent part 6, ]5
．． 22: Lid material 7: End hook part 8: Seaming wall Patent applicant Toyo Seikan Shikikai caterer representative Patent attorney Fumi Sato (and 2 others)
Name) Drive 1 7 ≠ 3 Figure early - 1 Figure early 5 V (A) (B) = 6 + Near 1 Line 7 Figure 1 l Os, I Figure 11

Claims (1)

[Scope of Claims] 1) A can located within the seaming part or sealing part when the lid is seamed or sealed in a three-piece can body formed by adhesively joining one blank. Can body of a three-piece can characterized in that at least one joint edge of the body joint part is provided with a notch at a place where the body hook is folded 2) A body hook is provided on the other joint edge of the can body joint part. A can body of a three-piece can according to claim 1, wherein a notch is provided at a location where