JPH05319433A - Metal container - Google Patents

Abstract

PURPOSE:To provide a metal container free from wedge-shaped interior space between a bottom plate member and a lid member. CONSTITUTION:In a metal container having a body plate member 1 forming a cylindrical body and a lid member 2 fixed to the end part of the body plate member, the side wall of the lid member is bent back outwardly of the container and extended upwardly parallel to the body plate member to form a short cylindrical peripheral part and a double seam joint is formed between the end part of the body plate member and the peripheral part of the lid member with the inner face of the end part of the former held into contact with the outer face of the peripheral part of the latter. An end part 1A of the body plate member 1 is made smaller in diameter than an intermediate part 1B of the container body and brought into contact with the outer face of a peripheral part 2A of the lid member 2 to form a short cylindrical joining part 1A. This joining part 1A and the peripheral part 2A of the lid member 2 are welded together from outside the container at a reduced-diameter base part of the joining part 1A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of metal containers, and more particularly to a metal container formed by fixing a tubular body plate member and a lid member by winding.

[0002]

2. Description of the Related Art In such a metal container, in order to fasten the body plate member and the lid member to each other, the peripheral portion of the lid member is bent so as to stand up to form a short cylindrical shape, and the outer surface of the peripheral portion is formed into the above-mentioned shape. It is in contact with the inner surface of the end of the body plate member. Therefore, a narrow wedge-shaped space is formed inside the container formed by winding and tightening between the curved portion and the body plate member which are generated when the peripheral portion is bent. If there is a wedge-shaped space inside the container, foreign matter and the like enter this space, which is not preferable when coating the inner surface or when using the container. Also, cleaning is difficult.

Therefore, Japanese Utility Model Publication No. 58-26896 proposes a structure for eliminating the wedge-shaped space. This container is shown in Figure 2.
As shown in FIG. 1, the peripheral portion 1 of the main plate 11 as one lid member
A narrowed portion 12A is formed on the body plate member 12 along a curved portion 11B generated when forming 1A, and a small wedge-shaped space S remaining between the narrowed portion 12A and the curved portion 11B is welded over the entire circumference. Thus, there is no wedge-shaped space in the container.

[0004]

However, in the container of Japanese Utility Model Publication No. 58-26896, in order to eliminate the wedge-shaped space, welding must be performed all around the inside of the container, which is a very troublesome work. It costs. Moreover, when tightening not only the base plate but also the top plate, the inside becomes a closed space and this method can no longer be applied.

It is an object of the present invention to solve such a problem and to provide a metal container having almost no problematic wedge-shaped space and performing welding from the outside of the container.

[0006]

According to the present invention, the above object has a body plate member forming a tubular body and a lid member fixed to an end of the body plate member. The member is formed with a short cylindrical peripheral portion that is bent so as to stand along the body plate member toward the outside of the container, and the inner surface of the end portion of the body plate member is the outer surface of the peripheral portion of the lid member. In a metal container in which the end portion of the body plate member and the peripheral portion of the lid member are wound around the peripheral edge in a state of being in contact with each other, the end portion of the body plate member is reduced in diameter from the middle portion of the body, This is achieved by forming a short tubular joint portion that contacts the outer surface of the peripheral portion, and the joint portion and the peripheral portion of the lid member are welded from the outside of the container at the reduced diameter base portion of the joint portion. It

[0007]

According to the present invention, the body plate member is in contact with the peripheral portion of the lid member at the short tubular joint formed by reducing the diameter from the middle portion of the body. Therefore, the transition portion connecting the joint portion and the intermediate portion extends radially outward from the peripheral portion of the lid member, and a wide space is formed between the peripheral portion of the lid member and the body plate member. However, the narrow wedge-shaped space is no longer formed.

The lid member and the body plate member are simply joined together by welding from the outside of the container at the base of the joint. Moreover, in the present invention, since this welding is not for filling the wedge-shaped space as in the conventional one, but for the auxiliary connection to the winding tightening, it is not necessary to perform it over the entire circumference.

[0009]

Embodiments of the present invention will be described below with reference to FIG. 1 of the accompanying drawings.

In FIG. 1, 1 is a body plate member and 2 is a lid member. In the illustrated case, the lid member 2 is shown as an example of a base plate, but if it has a vertically symmetrical form, it also serves as a top plate.

The body plate member 1 is formed in a tubular shape, in the illustrated case, a vertically elongated cylindrical shape, and its end portion (lower end portion in the illustrated case) is narrowed down to an inner diameter D1 smaller than the inner diameter D2 of the intermediate portion 1B. Forming a short tubular joint 1A. The joint 1A
The transition portion 1C from the intermediate portion 1B to the intermediate portion 1B is bent so as to spread radially outward from the joint portion 1A. In the case of the illustration, the transition portion is a curved portion 1C that can be convexly curved to the outside of the container.
Is formed as. The transition portion may be straight without having to be curved. The point is that the tangent to the joint and the tangent to each other may be discontinuous at the bent portion.

On the other hand, the lid member 2 is erected outside the container so that its peripheral portion 2A is along the joint portion 1A of the body plate member 1. The peripheral portion 2A of the lid member 2 and the joint portion 1A of the body plate member 1 are wound and fastened at their peripheral edges by a known method in a state of being fitted so as to be in contact with each other.

Further, the peripheral portion 2A and the joint portion 1A are welded from the outside of the container at the base portion of the joint portion 1A, that is, at the portion of the joint portion 1A which is close to the curved portion 1C which is the transition portion. Welding may be performed over the entire circumference or at appropriate multiple points around the circumference. The point is that it is sufficient that the joint portion 1A is connected to the peripheral portion 2A of the lid member. As for welding, various types of welding such as seam welding and laser welding are performed.

In the metal container of this embodiment, the joint portion 1A has a diameter smaller than that of the intermediate portion 1B of the body plate member 1, and the curved portion 1C sharply bends outward from the joint portion 1A. Since it is formed, no wedge-shaped space is formed between it and the lid member 2. This is because the bending of the curved portion 1C is different from the bending when the peripheral portion 2A of the lid member 2 is formed, because both the intermediate portion 1B and the joint portion 1A of the body plate member are cylindrical. This is because the part can have a square shape without roundness. The same applies even if the transition portion is linear.

An annular groove 3 is formed on the curved portion of the curved portion 1C and the lid member 2 having a rounded shape. Since the annular groove 3 has a sufficient width for cleaning and the like, it has a conventional wedge shape. There is no problem like space.

[0016]

As described above, according to the present invention, since the wedge-shaped space is not formed inside the metal container, it is possible to obtain the effect that problems such as defective coating on the inner surface due to foreign matter entering or defective cleaning after use do not occur. Further, since welding can be performed from the outside of the container, it can be applied to a container having not only a base plate but also a top plate. Moreover, since the welding is only for the purpose of holding and not for filling the wedge-shaped space, it only has to be performed at an appropriate place on the periphery and can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a metal container according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a main part of a conventional metal container.

[Explanation of symbols]

 1 Body plate member 1A End part (joint part) 1B Body middle part 1C Transition part (curved part) 2 Lid member 2A Surrounding part

Claims (2)

[Claims] 1. A body plate member forming a tubular body, and a lid member fixed to an end of the body plate member, the lid member extending toward the outside of the container along the body plate member. A short tube-shaped peripheral portion that is bent so as to stand upright is formed, and with the inner surface of the end portion of the body plate member in contact with the outer surface of the peripheral portion of the lid member, the end portion of the body plate member and the lid are closed. In a metal container in which the peripheral portion of the member is wound around the peripheral portion, the end portion of the body plate member has a diameter smaller than that of the middle portion of the body, and is a short tubular joint portion that contacts the outer surface of the peripheral portion of the lid member. And a peripheral portion of the lid member is welded from the outside of the container at a reduced diameter base portion of the joint portion. 2. The metal container according to claim 1, wherein a transitional portion from the joining portion to the middle portion of the body forms a curved portion that is convexly curved toward the outside of the container.