JPH02175036A - Multiple seaming method for square can - Google Patents

Abstract

PURPOSE:To impart a sufficient reaction against external force by executing seaming in multiple at the time of seaming a flange end edge of a can drum into a peripheral edge bent part of an end plate. CONSTITUTION:A stage for inserting a flange end edge 1a of a can drum 1 into a peripheral edge bent part 2a of an end plate 2, and a stage for bending the end edge 1a to the lower part by about 90 degrees and winding up the bent part 2a by about 90 degrees are executed. Subsequently, a stage for winding an insertion part 1b and a base part of the bent part 2a into semicircles 1c, 2c, and a stage for allowing the insertion part 1b of an end plate and a bent part 2b to be opposed to each other in the upper and the lower parts are executed. Also, a stage for raising roughly vertically the insertion part 1b as an end edge part 1d, and also, curving downward the bent part 2b as an end edge part 2d and pressing a seaming part inside peripheral edge 3 indicated with an arrow 4 is executed. Next, by pressing an outside peripheral edge 5 of the seaming part as indicated with an arrow 6, the insertion part 1d and the bent part 2d are hooked as shown by 1e and 2c in a hook shape from the upper and the lower parts and brought to seaming. In such a way, working is executed smoothly and at a high speed by a winding piece, and also, a sufficient drag can be given to external force.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a squaring multiple seaming method for the purpose of wrapping the edge of a squaring piece in three layers.

(Prior art) A conventional method has been proposed in which the edge of the can body and the periphery of the end plate of a drum can are wrapped in approximately 8 layers (Utility Model Publication No. 33700/1983), or the edge of the can body and the periphery of the end plate are wrapped in approximately 7 layers. A method of tightening and making metal contact by pressurizing the tightening part from the side and making metal contact
-7056) is known.

(Problems to be Solved by the Invention) According to the drum can, a knob-shaped annular portion is provided at the tip, but the problem with normal gallon cans and the like is that the subsequent operation cannot be performed smoothly due to the knob-shaped annular portion. There was a point. In addition, the method of pressurizing and recessing the winding portion from the side requires a pressure roll, which poses a problem that cannot be achieved by ordinary machining using a winding piece or the like.

(Means for Solving the Problems) However, this invention has succeeded in efficiently producing row seedlings using winding pieces by making the processing steps multi-step.

That is, the present invention includes the step of inserting the flange edge of the can body into the peripheral bent portion of the end plate, and the step of inserting the flange edge insertion portion into the peripheral bent portion of the end plate.
A process of bending the insertion part downward at 0 degrees and rolling up the bent part, a process of rolling up the insertion part into a semicircle, a process of facing the peripheral bent part of the end plate and the insertion part, a process of bending the edge of the insertion part upward, and a process of folding the insertion part into a semicircle. and the step of applying pressure to the seaming part from the lateral direction to engage the insertion part edge and the peripheral bent part of the end plate in a hook shape from above and below. This is the Kakuda multiple seaming method.

According to the above method, since the flange edge of the can body and the peripheral bent portion of the end plate are machined sequentially, there is no unreasonable process deformation.
Smooth machining can be performed at high speed.

(Function) In other words, in this invention, the process is divided into 6 steps and processed sequentially, so 7 steps are required.
Heavy seaming can be done easily. However, since each piece is bent into a predetermined shape by the winding piece, there is no risk of local strain being caused in the processing in each step.

(Example) Next, embodiments of the present invention will be described based on the drawings.

A first step (FIG. 1) of inserting the flange edge 1a of the can body 1 into the peripheral bent portion 2a of the end plate 2, and bending the edge 1a downward by approximately 90 degrees as shown in 1b to form the bent portion. 2a to 2b by almost 90 degrees (Fig. 2), the step of rolling the insertion part 1b and the base of the bent part 2a into a semicircle 1C12C (Fig. 3), and the insertion part 1b of the end plate and the bending part. Part 2a
(Fig. 4) and inserting part 1b into 1
At the same time as lifting the bent part 2b at a substantially right angle as shown in d, bending the bent part 2b downward as shown in 2d, and aligning the inner circumferential edge 3 of the seaming part with the arrow 4.
and the step of applying pressure as shown in Figure 5.

Pressure is applied to the outer circumferential edge 5 of the seaming portion as shown by arrow 6, and the insertion portion 1d and bent portion 2d are hooked from above and below into a hook shape 1e.
, 2e, and completed this seaming.

Conventionally, contents leakage from the seamed portion occurs when the can body edge 1a and the peripheral bent portion 2a of the end plate become unlatched when an external force is applied as shown by arrow 7.8 in Fig. 6. It is for this purpose. In other words, unlatching of this part means that the end edge 1e and the bent part 2 are
This is because e is deformed and the latch becomes unlatched. However, in the seaming process shown in Fig. 6, the edge 1e and the bent portion 2e are engaged with each other, which prevents deformation, so that an external force as shown by arrow 7.8 is applied. Even if there is a problem, the resistance of the seamed portion will be large and there is no risk of disassembly.

(Effects of the Invention) That is, according to the present invention, since the winding is done seven times through six rounds, it is possible to process the winding piece smoothly and at high speed, and
It has the advantage that it can be manufactured to have a resistance of 1000 lbs. to an external force.

[Brief explanation of the drawing]

The figures show the steps of the present invention; FIG. 1 is a partial sectional view of the first step, FIG. 2 is a partial sectional view of the second step, and FIG. 3 is a partial sectional view of the third step. 4 is a partial sectional view of the fourth step, FIG. 5 is a partial sectional view of the fifth step, and FIG. 6 is a partial sectional view of the sixth step. 1... Can IIN 2... End plate 1a.
...Edge 2a...Bent part Fig.2 Closing method 3 Supplementary 1 Relationship between the person doing the mo'1 and the matter Patent applicant name: Nippon Seikan Co., Ltd. 4, agent: 160 Telephone: 03 (353) 3407 (
1) Column 5 for detailed description of the invention in the specification (2) In the drawings, Figure 6 6, Contents of amendment (1) In the 7th line of page 4 of the specification, "Bending portion 2a and -) - below"
The statement has been corrected to read "the bent portion 2b is moved up and down." (2) Line 507 of the specification says “seven layers”. Correct “7 layers to J.” No. 4 No. 5

Claims (1)

[Claims] 1. Inserting the flange edge of the can body into the peripheral bent part of the end plate, bending the flange edge insertion part approximately 90 degrees downward and rolling up the bent part, rolling the insertion part into a semicircle, the end A process of aligning the bent peripheral edge of the plate with the insertion part, a process of bending the edge of the insertion part upward and latching it to the bent peripheral edge of the end plate, applying pressure to the seaming part from the side, and pressing the end of the insertion part. A multiple seaming method for square cans characterized by combining the steps of hooking the edge and the peripheral bent portion of the end plate in a hook shape from above and below.