JP4947496B2 - Metal container and manufacturing method thereof - Google Patents

Description

  The present invention relates to a metal container that accommodates and stores food, various industrial products, and the like, and a method for manufacturing the same.

  Conventionally, after forming a bottom surface portion by the same applicant as this type and a metal shallow container having a peripheral surface portion standing around the bottom surface portion by drawing, the peripheral surface portion is vertically divided to form the bottom surface. Divided into a lower part of the peripheral surface and an upper part of the peripheral surface integral with the part, and then a lower part of the metal peripheral surface intermediate body having an annular plane and a separate body between the upper part of the lower peripheral surface and the lower part of the upper peripheral surface The upper part is connected to each other, and the mold and press machine are not for deep bottom containers that use relatively advanced technology, but for shallow bottom containers that use relatively easy technology. Have proposed a method for producing a metal deep-bottomed container (for example, Patent Document 1).

In this prior art, an overhanging portion is provided at the edge of the upper opening edge, the outer edge of the overhanging portion is bent downward, and a folded portion is formed with its tip folded back inward. Such a folded portion prevents the finger from being damaged by the end surface of the folded portion when the finger hits the folded portion when the finger is put on the edge of the folded portion.
JP 2007-284097 A

  In the prior art, adjacent folded portions are connected or close to each other, and adjacent folded portions are connected or close to each other. However, if adjacent folded portions are connected or close to each other, adjacent folded portions are connected to each other. Interferes with each other and the portion becomes thicker than other portions, and the corners between the bent portions cannot be formed accurately.

  The problem to be solved is that a metal container in which the bent portions provided on the overhanging portion are connected or close to each other and adjacent folded portions are connected or close to each other is bent without interference between the adjacent bent portions. It is the point which forms the corner of each part correctly.

The invention according to claim 1 is formed by forming a protruding portion laterally with respect to the opening edge at the opening edge of each container intersecting the longitudinal direction, bending the outer edge of each protruding portion, In the metal container in which the edge of the bent portion is folded inward to form the folded portion, the adjacent bent portions are connected or close to each other, and the adjacent folded portions are connected or close to each other, the corner of the protruding portion A concave portion cut into a rectangular shape is formed in the portion, and the adjacent bent portions can be abutted and connected by the notched concave portion, and a notched portion is formed in one of the adjacent folded portions. The length in the longitudinal direction of the notch is formed to be slightly larger than the length in the direction perpendicular to the length direction of the other folded portion between the folded portions, The height of serial notch is a metallic container, wherein the folded portion is the height equal to or slightly larger of the other folded portion of the other.

In the invention of claim 2, a protruding portion is formed laterally with respect to the opening edge of each container at which the longitudinal direction intersects, and the outer edge of each protruding portion is bent to form a bent portion. In the method of manufacturing a metallic container, the edges of the respective bent portions are folded inward to form folded portions, and the adjacent bent portions are connected or close to each other, and the adjacent bent portions are connected or close to each other. In addition, it is possible to form a rectangular recess in the corner of the overhang and connect the adjacent bent parts by abutting and connecting the folded parts to each other. Alternatively, before connecting the bent portions to each other or approaching the bent portions, a notch portion is formed in one longitudinal end of the adjacent folded portions in advance, When connecting or approaching between the return portions, the longitudinal end of the other bent portion is engaged with the notch portion, and the length in the longitudinal direction of the notch portion is the return length. Forming the same or slightly larger than the direction length perpendicular to the length direction of the other folded part of the mutual part, and the height of the notch part being slightly larger than the height of the other folded part of the folded part. It is the manufacturing method of the metal container characterized by the above-mentioned.

According to the first aspect of the present invention, the longitudinal end of the other folded portion can be engaged with the notched portion that engages the longitudinal end of the other bent portion with the notched portion. Further, the end of the folded portion can be engaged with the cutout portion in the longitudinal direction. Furthermore, the end of the folded portion can be engaged with the cutout portion in the height direction.

According to invention of Claim 2, the interference in the end side of the longitudinal direction of a bending part can be eliminated. Further, the end of the folded portion can be engaged with the cutout portion in the longitudinal direction. Furthermore, the end of the folded portion can be engaged with the cutout portion in the height direction.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  FIGS. 1 to 8 show Example 1. In the first step shown in FIG. 2, one stainless steel plate (base plate) is shallowly formed by a first female die and a first male die (not shown). The bottom container 1 is formed by drawing. The shallow container 1 includes a plate-like bottom surface portion 2 having a rectangular plane and a plate-shaped peripheral surface portion 3 standing around the four sides of the bottom surface portion 2, and an upper opening edge 4 is formed on the upper side. A plate-like projecting portion 5, which is also referred to as a flange or the like, protrudes outward from the upper edge of the peripheral surface portion 3, which is formed with a substantially inverted truncated quadrangular pyramid frame portion 3 </ b> A. Concave portions 5A are formed at the four corners of the overhang portions 5 arranged in four directions so that the overhang portions 5 are not rectangular. The notched recess 5A allows the adjacent bent portions 9 to abut each other so as to be orthogonal to each other in the longitudinal directions X and Y as described later. Further, the peripheral surface portion 3 has a peripheral surface lower portion 7 and a peripheral surface upper portion in the vertical direction through a virtual boundary 6 provided in the entire periphery at the same height position in the height direction, and in the embodiment in the substantially entire periphery of the height direction. It is divided into eight.

  3-5, the overhang | projection part 5 is bend | folded toward the downward direction with the 2nd female die and 2nd male die which are not shown in figure, and the bending part 9 is formed. In the embodiment, the bent portion 9 is formed by projecting a protruding portion 5 laterally with respect to the opening edge 4A on the opening edge 4A of the upper opening edge 4 of each shallow container 1 where the longitudinal directions X and Y intersect. The outer edge of the part 5 is formed by bending downward along the entire length in the longitudinal direction X and Y. Further, folded portions 9A and 9B are formed by turning the tip into a U shape and folding the tip inward. The folded portions 9 </ b> A and 9 </ b> B are formed so that the edge end surface of the bent portion 9 extends over the entire length in the longitudinal directions X and Y so that the edge end surface does not come into contact with the fingers gripping the bent portion 9.

  Then, the adjacent bent portions 9 are connected so as to abut against each other in the longitudinal directions X and Y, and further between the adjacent folded portions 9A and 9B so as to be orthogonal in the longitudinal directions X and Y. Connected to hit. These connections are made by appropriate connection means such as welding (not shown), brazing, or using a coupling tool such as a bolt and nut. The edge surfaces 9C of the folded portions 9A and 9B are curled and abut against the inner surface of the bent portion 9, and the edge surface 9C is connected to the bent portion 9. In this connection, welding is performed by applying heat using a burner or the like from the front side of the bent portion 9 corresponding to the edge surface 9C.

  Further, a notch portion 10 is formed in a square shape in one folded portion 9A of the adjacent folded portions 9A and 9B. The notch 10 is formed at the end in the longitudinal direction X of the folded portion 9A, that is, one of the adjacent portions of the folded portions 9A and 9B. The length A of the notched portion 10 in the longitudinal direction X is The length of the folded portion 9B is equal to or slightly larger than the direction length B perpendicular to the longitudinal direction Y (A = B, A> B). Further, the height C of the notch 10 is formed to be the same as or slightly larger than the height D of the folded portion 9B (C = D, C> D). In addition, a rectangular end 9D in the longitudinal direction Y of the folded portion 9B is engaged with the notch 10. For this reason, as shown in FIG. 2, a notch 10 has a length A in the longitudinal direction X and a depth C ′ having a height C (C ′ = C) at one edge of the corner of the overhang 5. 'Is formed so as to be connected to the recess 5A. Therefore, the notch 10 ′ shown in FIG. 2 and the notch 10 shown in FIGS. 3 to 5 have substantially the same shape.

  In the third step shown in FIGS. 1 and 6 to 7, the shallow container 1 is divided into a lower part 1 </ b> A and an upper part 1 </ b> B with the virtual boundary 6 as a boundary. The lower portion 1A is formed by integrally forming the bottom surface portion 2 and the lower peripheral surface portion 7, while the upper portion 1B is formed by a peripheral surface upper portion 8 having a rectangular frame shape. A circumferential intermediate 11 made of a stainless steel metal plate is interposed in a gap A between the upper end of the circumferential upper portion 8 and the lower end of the circumferential lower portion 7. As shown in FIG. 6A, the peripheral surface intermediate body 11 has a rectangular plane formed by, for example, a third female mold and a third male mold (not shown) made of a single stainless steel plate (base plate). It is annular and has a side surface formed into a substantially rectangular frame (FIG. 6B), and its leading edge is connected by a weld 11A as shown in FIG. 6C. The upper edge of the lower peripheral surface 7, the upper and lower edges of the upper peripheral surface 8, and the lower edge of the peripheral intermediate body 11 are formed in the same shape when viewed from the plane.

  Further, in the third step, as shown in FIG. 7 as a pretreatment for the fourth step, which will be described later, an upper portion 1B with the upper opening edge 4 facing upward as shown in FIG. 11 and the lower portion 1A with the lower peripheral surface 7 on the upper side from the bottom surface portion 2 are arranged coaxially in the vertical direction at intervals, and each end surface is held by a jig (not shown). Sharpen 12 with a blade not shown. In this shaving process, the end face 12 is formed at right angles to the side face. As shown in FIG. 7, this processing is performed in the vertical direction, with the upper portion 1 </ b> B having the upper opening edge 4 facing upward, the peripheral intermediate body 11 with the openings arranged in the vertical direction, and the lower peripheral surface 7 above the bottom surface portion 2. The lower portion 1A is processed while rotating as a whole around a central axis that is coaxial with the lower portion 1A being fixed in a state of being coaxially arranged in the vertical direction at intervals.

  In the fourth step shown in FIG. 8, the peripheral surface intermediate body 11 and the peripheral surface upper part 8 are stacked on the peripheral surface upper part 8 integrated with the bottom surface part 2. Then, the upper edge of the lower peripheral surface 7 and the lower edge of the peripheral intermediate body 11 are fixedly connected by the first welded portion 12. Further, the upper edge of the peripheral surface intermediate body 11 and the lower edge of the peripheral surface upper portion 8 are fixedly connected by the second welded portion 13. The order of these two weldings may be changed. In this way, the deep bottom container 14 having a large depth is manufactured.

  In addition, when the container with the shallow depth to be manufactured first is the shallow container 1 as the deep container 14 according to the present invention, the depth is relatively increased through the above-described process with respect to the shallow container 1. The container is referred to as a deep-bottom container 14, and the depth and squeezing rate of each of the shallow-bottom container 1 and the deep-bottom container 14 are not limited numerically.

  As described above, in the embodiment, the bottom surface portion 2, the peripheral surface lower portion 7 erected around the bottom surface portion 2, and the peripheral surface lower portion 7 are cut to form the gap A above the peripheral surface lower portion 7. A peripheral surface upper portion 8 provided and a peripheral surface lower portion 7 disposed in the gap A and a peripheral surface intermediate body 11 integrally connected to the peripheral surface upper portion 8, so that the aperture ratio is increased. Even if the base plate is not drawn, the metal deep-bottom vessel 14 can be manufactured relatively easily by using the shallow vessel 1 drawn with a drawing ratio being relatively small.

  In addition, a protruding portion 5 is formed laterally with respect to the opening edge 4 at the opening edge 4 of each container where the longitudinal directions X and Y intersect, and the bent portion 9 is formed by bending the outer edge of each protruding portion 5. And forming the folded portions 9A and 9B by folding the edges of the respective folded portions 9 inward, connecting the adjacent folded portions 9 to each other, and connecting the adjacent folded portions 9A and 9B to each other. When the notched portion 10A is formed in one folded portion 9A of the folded portions 9A and 9B and the folded portions 9A and 9B are connected to each other, the end portion in the longitudinal direction Y of the other folded portion 9B is connected to the notched portion 10B. Since 9D can be engaged, the ends of the folded portions 9A and 9B do not interfere with each other.

  Further, the length A in the longitudinal direction X of the notch 10 is formed to be equal to or larger than the length B perpendicular to the length direction Y of the other folded portion 9B. The end 9D of 9B can be engaged in the longitudinal directions X, Y.

  Further, the height C of the notch 10 is formed to be equal to or greater than the height D of the other folded part 9B between the folded parts 9A and 9B, so that the end 9D of the folded part 9B is formed in the notched part 10. Engage in the height direction.

  In addition, in the metal container manufacturing method, the folded portions 9 are connected to or close to each other, and before the bent portions 9A and 9B are connected to or close to each other, the longitudinal direction X is set to one of the adjacent bent portions 9A and 9B. A notch 10 is formed at the end, and the end 9D in the longitudinal direction Y of the other bent portion 9B is engaged with the notch 10 when the folded portions 9A and 9B are connected or close to each other. Thus, interference on the end 9D side in the longitudinal directions X and Y of the bent portions 9A and 9B can be eliminated.

  As described above, the metal container and the manufacturing method thereof according to the present invention can be applied to various uses. The material of the container is not limited to stainless steel, and various metals can be used.

It is a disassembled perspective view which shows the 3rd process which shows Example 1 of this invention. It is a perspective view which shows the 1st process. It is the perspective view which made the part which shows the 2nd process the expanded cross section. It is an expanded perspective view of the principal part which shows the 2nd process. It is an expanded sectional view of the important section showing the 2nd process. FIG. 6A is a perspective view of a metal plate, FIG. 6B is a perspective view of a bent state, and FIG. 6C is a perspective view of a frame state. Is shown. It is sectional drawing which shows the said 3rd process. It is sectional drawing which shows the said 4th process.

5 Overhang part
5A Concave part 9 Bending part 9A 9B Folding part 9D End
10 Notch A B Length C D Height XY Longitudinal direction

Claims (2)

A protruding portion is formed laterally with respect to the opening edge at the opening edge of each container whose longitudinal direction intersects, and the outer edge of each protruding portion is bent and formed, and the edge of each bent portion is formed on the inner side. In a metal container that is folded back to form a folded portion, is connected or close to the adjacent bent portions, and is connected to or close to the adjacent folded portions,
It is possible to form a recess cut out in a rectangular shape at the corner of the overhanging portion, and abut against each other between the bent portions adjacent to each other by the notched recess, and
A notch is formed in one of the adjacent folded portions, and the length in the longitudinal direction of the notched portion is the same or slightly larger than the length in the direction perpendicular to the length direction of the other folded portion between the folded portions. Further, the metal container is characterized in that the height of the cutout portion is formed to be the same as or slightly larger than the height of the other folded portion between the folded portions . A protruding portion is formed laterally with respect to the opening edge at the opening edge of each container intersecting in the longitudinal direction, and the outer edge of each protruding portion is bent to form a bent portion. In the method of manufacturing a metallic container in which an edge is folded inward to form a folded portion, the adjacent folded portions are connected or close to each other, and the adjacent folded portions are connected or close to each other.
  It is possible to form a recess cut out in a rectangular shape at the corner of the overhanging portion, and abut against each other between the bent portions adjacent to each other by the notched recess, and
  Before connecting or bringing the folded portions together, the cut portions are formed in one longitudinal end of the adjacent folded portions in advance, and the folded portions are connected. Is connected to or close to the notch, and the longitudinal end of the other bent part is engaged with the notch, and the length of the notch in the longitudinal direction is the other of the folded parts. It is characterized in that it is formed to be the same or slightly larger than the direction length orthogonal to the length direction of the folded portion, and the height of the notch portion is formed to be the same or slightly larger than the height of the other folded portion between the folded portions. A method for producing a metal container, characterized by comprising:

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