JPH0718589Y2 - Metal can - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure for winding and fastening a body and a bottom lid of a metal can container.

[Prior Art] There is a metal can which is formed by molding a thin metal plate such as tin plate as a simple container for packing foods and the like. Sixth
The figure is a front view of a metal canister that has been generally used conventionally. The metal can 1 includes a main body including a can body 12 and a bottom lid 15, and an upper lid 10. The main body has a can body 12 formed by forming a thin tin plate and a bottom cover 15 which are integrated by winding and tightening. FIG. 7 is a cross-sectional view of the winding-fastened portion 13 between the can body 12 and the bottom lid 15. As shown in the figure, the lower portion of the can body 12 and the outer peripheral portion of the bottom lid 15 are spirally bent and crimped so as to mesh with each other. The thickness of this winding tightening portion 13 is
When a thin tin plate of 1 mm or less is used, the outer dimensions L ₁ and L ₂ are formed to be about ₁ to ₂ mm.

FIG. 8 is a cross-sectional view showing the forming process of the can body 12 and the bottom cover 15. The can body 12 and the bottom lid 15 are press-molded into the shape shown in advance. Then, using the forming roll 16,
The bottom of 12 and the peripheral edge of the bottom lid 15 are roll-formed. By this molding process, the winding tightening portion 13 as shown in FIG. 7 is formed.

[Problems to be Solved by the Invention] Such a metal can is used as a container for groceries, sold at a store, or used as a gift. In this case, there is a demand for increasing the stability of the container and improving the appearance of the container. In response to such demands, attempts have been made to form the winding fastening portion 13 of the conventional metal can 1 shown in FIGS. 6 and 7 so as to have a large curvature. In this method, the length L ₃ of the mating surface between the lower end of the can body 12 and the outer edge of the bottom lid 15 in FIG. 8 is increased, and the curvature of the forming roll 16 is increased to perform roll forming. there were. However, in such a method, the winding tightening portion 13 is formed so as to be wound in a spiral shape with a small curvature, and the winding tightening portion 13 having a desired outer shape cannot be formed.

Therefore, the present invention has been made in order to solve the above problems, and provides a metal can having a winding structure capable of processing the outer shapes of the winding-fastened portions of the can body and the bottom cover to a large extent. The purpose is to do.

[Means for Solving the Problems] The metal can according to the present invention is formed by winding a hollow can body and a bottom lid together. The bottom lid includes a flat first portion that forms the inner bottom surface of the can, a second portion that extends from the peripheral portion of the first portion toward the outside of the bottom lid plane, and a second portion. The third part which is continuous with the peripheral part of the part and is folded back toward the inside of the bottom cover plane, and the continuous part which is continuous with the peripheral part of the third part and is sandwiched between the second part and the third part. And a fourth portion folded back into the space. Further, a first space is formed between the third portion and the fourth portion, and a second space is formed between the fourth portion and the second portion.

Further, the can body has a hollow body, and is inserted into the second space so that the tip of the lower end portion thereof is located in the second space of the bottom lid, and the hollow body located in the second space. At the lower end of the portion, a protrusion is formed that contacts the surface of the fourth portion of the bottom lid facing the second space.

Further, in a metal can according to another invention, the bottom lid includes a first portion having a flat portion that constitutes an inner bottom surface of the can and a folded portion that is obtained by folding an outer peripheral portion of the can lid to the outside of the can. A second portion extending from the periphery of the folded-back portion of the first portion toward the flat lid portion toward the outside of the bottom lid plane;
A third part which is connected to the peripheral part of the part of and which is folded back toward the inside of the bottom lid plane, and which is connected to the peripheral part of the third part,
It has the 4th part folded back in the space pinched by the 2nd part and the 3rd part. Further, in this bottom lid, a first space is formed between the third portion and the fourth portion,
A second space is formed between the portion and the second portion.

Further, the can body has a hollow body, and is inserted into the second space so that the tip of the lower end portion thereof is located in the second space of the bottom lid, and the hollow body located in the second space. The lower end of the body has a protrusion that comes into contact with the folded portion of the first portion of the bottom lid.

[Operation] In the metal can according to the present invention, the outer peripheral edge portion of the bottom lid is spirally folded back into a predetermined shape to form a space region inside the folded back portion, and the lower end portion of the can body having the protruding portion in this region. Is inserted, and the folded-back portion of the bottom lid and the protruding portion of the can body are brought into contact with each other to form a fall-out prevention structure. Therefore, the outer peripheral portion of the bottom lid can be processed to have a predetermined outer shape of the bent portion.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view of a metal can 1 according to an embodiment of the present invention. The metal can 1 has a main body in which the can body 2 and the bottom lid 5 are integrated, and an upper lid 10. The outer shape of the winding-fastened portion of the main body 2 of the main body and the bottom cover 5 is formed to have a larger curvature than that of the conventional one. Similarly, the upper lid 10 is also formed with an edge portion having a large curvature.

FIG. 2 is a cross-sectional configuration diagram of a portion where the can body 2 and the bottom cover 5 are fastened together. The bottom lid 5 is divided into four parts for convenience of description. That is, the flat portion (first
5a), a stepped portion (second portion) 5b formed in a stepped shape, a first folded portion (third portion) 5c folded back with a large curvature, and a spiral shape. It is composed of a second folded portion (fourth portion) 5d folded back to.
The second folded-back portion 5d is located between the first folded-back portion 5c and the first folded-back portion 5c.
And the second folded-back portion 5d further defines a second space 7 between itself and the stepped portion 5b.

The bottom of the can body 2 is inserted into the second space 7 of the bottom lid 5. The bottom of the can body 2 has a protrusion 3a bent outward in a U shape. The tip of the protrusion 3a is in contact with the surface of the second folded portion 5d of the bottom lid 5. Also,
The can body 2 is pinched between the surface of the stepped portion 5b of the bottom lid 5 and the surfaces of the first folded portion 5c and the second folded portion 5d.

The feature of such a structure is that the folded-back portions 5c and 5d of the bottom lid 5 and the protruding portions 3a of the can body 2 are not tightly wound in a state of being superposed and in close contact with each other. , 5d is largely folded and formed so that a space can be formed therein. As a result, the outer shape l _{1 of} this folded portion,
L ₂ can be formed to have a height of about 20 to 30 cm and a width or a diameter of about 10 to 20 cm in a can of about 4 to 6 mm. The external dimensions of the winding-fastened portion are not given by the structural restrictions, but are determined from the viewpoint of the appearance of the can. Therefore, a larger shape is possible.

FIG. 3 is a cross-sectional configuration diagram of the metal can winding portion according to the second embodiment. In this example, the lower end of the can body 2 is formed with a protruding portion 3b protruding in a V-groove shape. The protruding portion 3b and the second folded portion 5d of the bottom lid 5 are in contact with each other to prevent the can body 2 and the bottom lid 5 from being separated from each other.

FIG. 4 is a cross-sectional structural view of the tightening portion of the metal can 1 according to the embodiment of FIG. In this example, a projecting portion 3c bent inward is formed at the lower end portion of the can body 2. The bottom lid 5 also has a protrusion 5e formed by folding the end of the flat portion 5a toward the outside of the can.
The step portion 5b of the bottom lid 5 is formed so as to be continuous with the protruding portion 5e. The protrusion 5e of the bottom lid 5 and the protrusion 3c at the tip of the can body 2 are in contact with each other to prevent separation.

Further, FIG. 5 is a partial sectional structural view of the upper lid 10. Top lid
A bent portion 10a having an outer shape similar to that of the winding tightening portion of the can main body is formed on the edge portion of 10. The outer dimensions l ₃ and l ₄ of the bent portion 10a are formed to be substantially the same as the outer dimensions l ₁ and l ₂ shown in FIG. As described above, by forming the bent portion 10a similar to that of the main body on the upper lid 10, the sense of stability of the can is increased and the appearance is improved. Furthermore, when removing the upper lid 10, it is easy to grasp with the fingertips, and the upper lid 10 can be easily removed. It is desirable that the bent portion 10a of the upper lid 10 be formed in the same shape as the winding tightening portion of the main body, but a bent portion having a small diameter may be formed as in the conventional case.

The structure of the can container described above is not limited to the shape of the can main body, such as a cylindrical or hollow prismatic can as well as a hollow pyramid or a cone, and is widely applicable to various cans. can do.

[Effect of the Invention] As described above, the metal can according to the present invention forms a bent portion in which the peripheral portion of the bottom lid is spirally bent so as to form a space therein, and the space of the bent portion is formed. Since it is configured to insert the lower end of the can body that has a protruding part inside, it is possible to configure the outer shape of the tightening part between the bottom lid and the can body to any size, and the stability of the metal can And the appearance can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a metal can according to an embodiment of the present invention. FIG. 2 is a sectional structural view of a winding tightening portion of the can main body according to the first embodiment. FIG. 3 is a cross-sectional structural diagram of the winding tightening portion according to the second embodiment. FIG. 4 is a sectional structural view of a winding tightening portion according to the third embodiment. FIG. 5 shows the first
FIG. 3 is a partial cross-sectional structural view of the upper lid 10 shown in the figure. FIG. 6 is a front view of a conventional metal can. FIG. 7 is a cross-sectional structural view of a winding portion of a conventional metal can. FIG. 8 is a sectional view of the manufacturing process for the winding tightening portion in FIG. 7. In the figure, 1 is a metal can, 2 is a can body, 3a, 3b and 3c are protrusions of the can body 2, 5 is a bottom cover, 5a, 5b, 5c, 5d and 5e are flat parts and steps of the bottom cover 5, respectively. , A first folded portion, a second folded portion and a protruding portion, 6 is a first space, and 7 is a second space. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Scope of utility model registration request] 1. A metal can formed by winding and fastening a bottom edge of a hollow can body and a peripheral edge of a bottom cover, wherein the bottom cover is a flat first member forming an inner bottom surface of the can. Portion, a second portion extending in a step shape from the peripheral portion of the first portion toward the outside of the bottom lid plane, and the second portion extending to the peripheral portion of the second portion toward the inside of the bottom lid plane. A third portion folded back, and a fourth portion continuous with a peripheral portion of the third portion and folded back in a space sandwiched between the second portion and the third portion. Forming a first space between the third portion and the fourth portion and forming a second space between the fourth portion and the second portion, The can body has a hollow body, and is inserted into the second space so that a tip end of a lower end portion thereof is located in the second space of the bottom lid. At the lower end of the hollow body to position the protrusion abutting the surface facing the second space side of the fourth portion of said bottom lid is formed, the metal cans. 2. A metal can formed by winding and fastening a bottom edge of a hollow can body and a peripheral edge of a bottom lid, wherein the bottom lid includes a flat portion forming an inner bottom surface of the can. A first portion having a folded portion in which the outer peripheral portion of the flat portion is folded back to the outside of the can, and a bottom lid flat surface in a step shape from the peripheral edge of the folded portion of the first portion to the flat portion. A second portion extending outwardly is connected to a peripheral portion of the second portion, and a second portion folded back toward the inside of the bottom lid plane is connected to a peripheral portion of the third portion. , A fourth part folded back into a space sandwiched between the second part and the third part
Forming a first space between the third part and the fourth part, and a second space between the fourth part and the second part. The can body has a hollow body, and is inserted into the second space so that a tip of a lower end portion thereof is located in the second space of the bottom lid, and A metal can, wherein a protrusion that abuts the folded portion of the first portion of the bottom lid is formed at the lower end of the hollow body located in the space 2.