KR101177614B1 - Square can - Google Patents

Abstract

<Task>

Even if the steel sheet used as a material is made thinner, it is providing each shape can which can obtain desired durability with respect to uneven load especially in a corner part.

<Solution>

Each shape can formed by joining the end plates 20a and 20b to each of the open ends of the body portion 10, which is a substantially rectangular cylindrical body, and each corner portion 18a, 18b, 18c, 18d of the body portion 10. The pair of longitudinally reinforcing convex beads 15a and 15b extending from each of the both ends and protruding outward are formed on the top of the top portion 18top.

Steel plate, corner part, single load, durability, each shape can

Description

Each shape can {SQUARE CAN}

The present invention relates to each shape can such as a so-called 18 liter can, and more particularly, to a shape can in which reinforcing beads extending in a longitudinal direction in a corner portion are formed. will be.

In each shape can such as a so-called 18 liter can, it is proposed to form a longitudinal reinforcement bead in the cylindrical body portion in order to improve durability against the longitudinal load (for example, Patent Document 1 and Patent). See Document 2. In each of these shaped cans, reinforcement beads which extend in the vertical direction and protrude inwardly are formed on both sides with the apex portions (burst butts, etc.) at each corner of the trunk portion interposed therebetween. As such, the reinforcement beads are formed at each corner of the trunk portion, so that the durability against the longitudinal load at each corner increases, so that, for example, each of the cans stacked in multiple stages is displaced by the load collapse or the like and is uneven at the corner. Even if it is heavy, deformation and buckling at the corners can be prevented.

Patent Document 1: Japanese Utility Model Publication 1977-142063

Patent Document 2: Japanese Patent Publication No. 1977-43154

Problems to be Solved by the Invention

By the way, in each of these shape cans, it is desired to make the steel sheet used as the material thinner from the viewpoint of cost reduction and the weight reduction. Since thinning the steel sheet in such a manner adversely affects the durability of each shape can, an important problem is how to form a reinforcing bead for reinforcing the trunk portion.

This invention is made | formed in view of such a situation, Comprising: Even if it makes thin metal plate materials, such as a steel plate which becomes a material, it provides each shape can which can obtain desired durability especially in uneven load etc. in a corner part.

MEANS FOR SOLVING THE PROBLEMS [

Each shape can which concerns on this invention is each shape can formed by joining an end plate to each of the open ends of the trunk part which becomes a substantially rectangular cylinder, The crown part of each corner part of the said trunk part And at least one pair of longitudinally reinforcing convex beads extending from each of the ends and protruding outwardly.

With such a configuration, the corner portion is reinforced by at least one pair of longitudinally reinforcing convex beads formed so as to extend from each of both ends of the corner portion of the body portion.

Each of the longitudinally reinforcement convex beads may be formed so as to at least partially extend to the crown portion of the corner portion. In addition, the shape including the width and length of each longitudinally reinforcing convex bead can be determined to be optimal according to the size of each shape can, the assumed load, impact, material properties and thickness thereof, and the like.

Moreover, in each shape can which concerns on this invention, it is set as the structure in which the pair of longitudinally reinforced convex bead which extends from each of the said both ends, and protrudes outward is formed on the said crown part of each corner part of the said trunk part. There is a number.

With this configuration, the corner portion is reinforced by a pair of longitudinally reinforcing convex beads formed so as to extend from each of both ends on the corner portion of the body portion.

Moreover, in each shape can which concerns on this invention, it joins along the said crown part of each corner part of the said trunk | drum, and is comprised by the structure in which two pair of longitudinally reinforced convex beads extended from each of the said both ends, and protruded outward are formed. do.

With such a configuration, the corner portion is reinforced by two pairs of longitudinally reinforcing convex beads formed so as to be joined along the crown of each corner portion of the trunk portion and extend from each of both ends thereof.

Moreover, in each shape can which concerns on this invention, the other end plate is joined from the junction part with one end plate to the boundary part with the said corner part of the side wall surface which leads to each of both sides of each said corner part in the said trunk part. It can be set as the structure in which the longitudinal reinforcement bead of the predetermined width extended to the junction part with the is formed.

By such a configuration, it is also possible to ensure sufficient durability against unloading loads from adjacent portions of each corner portion. Therefore, it is possible to effectively prevent deformation or buckling as the corner portions collapse with the deformation in the vicinity thereof.

Moreover, each shape can which concerns on this invention superimposes and joins the both ends of the rectangular metal plate material, and connects an end plate to each of the both ends which open the trunk part which becomes a substantially rectangular cylinder formed so that the said junction part may become a corner part. Each shape can formed by joining, at least one pair of longitudinal reinforcement which extends from each of the both ends and protrudes outwardly to each corner portion except for the corner portion with the joining portion of the body portion. Convex beads are formed.

By this structure, each corner part except the corner part with the junction part of a trunk | drum is reinforced by the at least 1 pair of longitudinally reinforced convex beads formed so that it may extend over each crown part, and may extend from each of both ends of the said trunk | drum, This corner part is reinforced by the overlap of the metal plate material in the said junction part.

Moreover, in each shape can which concerns on this invention, in each corner part except the corner part with the said junction part of the said trunk | drum, a pair of pairs which extend from each of the said both ends, and protrude outward on the crown part It can be set as the structure in which the longitudinal reinforcement convex bead was formed.

With this configuration, the corner portion is reinforced by a pair of longitudinally reinforcing convex beads formed so as to extend from each of both ends on the top of each corner portion except for the corner portion where the body portion has a joining portion.

In addition, in each of the shape cans according to the present invention, only two corner portions except the corner portion with the joint portion of the trunk portion are joined along the parietal portion, and extend from each of the both ends and protrude outwards. It can be set as the structure in which a pair of longitudinally reinforced convex beads were formed.

With such a configuration, the corner portions are reinforced by two pairs of longitudinally reinforcing convex beads formed so as to be joined along the crown portion of each corner portion except for the corner portion where the body portion is joined, and extend from each of the both ends.

Moreover, in each shape can which concerns on this invention in which a pair of longitudinally reinforced convex bead was formed in each corner except the corner part with the said junction part of the said trunk | drum, it leads to each of both sides of each corner | angular part in the said trunk | drum. It can be set as the structure in which the longitudinal reinforcement bead which extends from the junction part with one end plate to the junction part with the other end plate is formed in the boundary part with the said corner part of a side wall surface.

By such a configuration, it is also possible to ensure sufficient durability against unloading loads from adjacent portions of each corner portion. Therefore, it is possible to effectively prevent deformation or buckling as the corner portions collapse with the deformation in the vicinity thereof.

EFFECTS OF THE INVENTION [

According to each shape can which concerns on this invention, the said corner part is reinforced by the at least 1 pair of longitudinally reinforced convex beads formed so that it may be extended over each corner part of the trunk part, and may extend from each of the both ends, According to each shape can which concerns on this invention in which a pair of longitudinally reinforced convex bead was formed in each corner except the corner part with the said junction part, each corner part except the corner part with the junction part of a trunk part spreads over the crown part. Each corner portion with the joining portion is reinforced by the overlap of the metal plate in the joining portion, while being reinforced by at least one pair of longitudinally reinforced convex beads formed to extend from each of both ends of the body portion. Even if the metal sheet used as the material is made thinner, particularly in the corner part, Durability can be obtained.

1: is a top view (a) and the front view (b) seen from the top of each shape can which concerns on 1st Embodiment of this invention.

It is a perspective view of each shape can which concerns on 1st Embodiment of this invention.

3 is a diagram showing manufacturing procedures (a), (b) and (c) of the trunk portion of each shape can.

FIG. 4: is A-A partial sectional drawing (a) and B-B partial sectional drawing (b) in FIG.1 (b).

FIG. 5 is a cross-sectional view showing a mold mechanism of a press apparatus for manufacturing a trunk portion. FIG.

It is sectional drawing which shows the state which press-forms a trunk part by the metal mold | die mechanism shown in FIG.

7 is a perspective view (a) and a sectional view (b) of a corner portion of each shape can according to the second embodiment of the present invention.

It is a figure which shows the evaluation result about the durability with respect to single-load and impact load in the corner part of each shape can.

FIG. 9: is a perspective view (a) and the cross section (b) of the corner part which show the structure of each shape can as a comparative example. FIG.

Fig. 10 is a plan view (a) and a front view (b) seen from above of each shape can according to the third embodiment of the present invention.

It is a perspective view of each shape can which concerns on 3rd Embodiment of this invention.

It is a figure which shows the manufacturing procedure (a), (b) of the trunk part of each shape can.

It is a perspective view which shows the cylinder of the square shape used as the base of the trunk | drum of each shape can.

14 is an enlarged detail view of the region Ec in FIG. 13.

FIG. 15 is a partial cross-sectional view taken along the line C-C in FIG.

It is sectional drawing which shows a part of the metal mold | die mechanism of the press apparatus which shape | molds the corner part which has a side seam part (joint part part) in a trunk part.

It is sectional drawing which shows the state which press-forms a trunk part by the part of the metal mold | die mechanism shown in FIG.

18 is a perspective view (a) and a sectional view (b) of a corner of each shape can according to the fourth embodiment of the present invention.

<Code description>

10 Body

12 length reinforcement bead

14 Reinforced Bead

15a, 15b Reinforced Convex Bead

15a1, 15a2, 15b1, 15b2 보강 Vertically reinforced convex beads

16 Rectangular Reinforcement

18a, 18b, 18c, 18d corner portion

18top Repair

20a Top plate (end plate)

20b bottom plate (end plate)

110 cylindrical body

120, 130 ° C

201 Corner space

210, 220, etc. mold

211, 221 Convex

230, 240mm mold

231, 241

250, 270 corner outer mold

251 Okubu

271 Concave-shaped curved surface

260, 280 Corner Inner Mold

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described using drawing.

Each shape can which concerns on 1st Embodiment of this invention is comprised as shown to FIG. 1 and FIG. 2, for example. 1 is the top view (a) and front view (b) which looked at each shape can which concerns on the 1st Embodiment of this invention from upper direction, and FIG. 2 is a perspective view of each shape can.

1 and 2, each of these shaped cans (so-called 18-liter cans) is formed of a steel plate having a predetermined thickness, and is provided with a top plate 20a on the upper end of the trunk portion 10 that becomes a substantially rectangular cylindrical body. The end plate is joined and fixed by a winding body, and the bottom plate 20b (end plate) is joined and fixed by a winding body at its lower end. On each side wall surface of the trunk portion 10, two longitudinal reinforcement beads 12, two transverse reinforcement beads 14, and a rectangular reinforcement portion 16 (commonly known as a picture frame) are press-processed. Formed. The rectangular reinforcement part 16 is located in the substantially center part of each side wall surface of the trunk part 10, and the two horizontal reinforcement beads 14 are located above and below the rectangular reinforcement part 16. As shown in FIG. Each longitudinal reinforcement bead 12 has a top plate at a boundary portion with a corresponding corner portion of the side wall surface that extends to each of both sides of the corner portions 18a, 18b, 18b, and 18c of the trunk portion 10, respectively. It is formed so that it may extend from the junction part with 20a) to the junction part with the base plate 20b.

The manufacturing method of the trunk | drum 10 of each shape can is demonstrated easily.

A rectangular metal plate (steel plate) 100 as shown in Fig. 3 (a) is formed into a cylindrical shape as shown in Fig. 3 (b), for example, and its edges are overlapped. By joining these edge parts which overlap with each other by welding, the cylindrical cylinder (circular cylinder) 110 is formed. Next, the cylindrical body 11 is formed into a substantially rectangular cylindrical body 120 by press working, as shown in FIG.3 (c). When forming the substantially rectangular cylindrical body 120, the welded joint (called a side seam portion) 19 of the metal plate 100 does not come to any corner of the substantially rectangular shape. The positioning of the cylindrical body 110 to the press working machine is performed. Moreover, as shown to Fig.4 (a) (A-A cross section in Fig.1 (b)), each longitudinal reinforcement bead 12 becomes concave shape concave inward from the outer side of the trunk part 10, and is rectangular. The reinforcement part 16 is a shape in which the edge part swelled relatively compared with the inner side. Although not shown, each of the transverse reinforcement beads 14 has a convex shape protruding from the inside of the body portion 10 to the outside.

Moreover, on the top part 18top which extends in the longitudinal direction of each of the corner parts 18a, 18b, 18c, and 18d, the longitudinal reinforcement bead 15a is formed so that it may extend from the edge part on the side of the top plate 20a, and The longitudinal reinforcement beads 15b are formed in pairs so as to extend from an end portion on the bottom plate 20b side. These pairs of longitudinal reinforcement beads 15a and 15b are convex protruding from the inside of the trunk portion 10 to the outside, as shown in Fig. 4B (B-B sectional view in Fig. 1B). It is shaped. Hereinafter, in order to distinguish these pair of longitudinal reinforcement beads 15a and 15b from the above-mentioned longitudinal reinforcement beads 12, it is called longitudinal reinforcement convex beads 15a and 15b.

The width and length of each longitudinally reinforcing convex bead 15a, 15b are determined so as to obtain the desired durability against unloading and impact load at each corner portion 18a, 18b, 18c, 18d.

The trunk | drum 10 of the structure mentioned above is manufactured by the press apparatus which has a metal mold | die mechanism shown in FIG. 5 and FIG. 6, for example. In addition, although FIG. 5 and FIG. 6 show the part which divided | divided the whole mold mechanism into one quarter, it is set as the same structure also about another division part.

In FIG. 5, the outer molds 210 and 220 which face the press surface inward are arrange | positioned on the outer side of the inner molds 230 and 240 which made the press surface facing outward. On the press surfaces of the inner molds 230 and 240, the recesses 231 and 241 for forming the longitudinal reinforcement beads 12 (see FIGS. 1, 2 and 4) or the respective beads for forming the beads Concave-convex portions (not shown) are formed, and portions corresponding to the concave portions 231 and 241 of the press surfaces of the outer molds 210 and 220 or portions corresponding to the concave-convex portions of the inner molds 230 and 240 are formed. Convex portions 211 and 221 and corresponding uneven portions (not shown) are formed. Corner spaces 201 are formed at opposing angle portions of the inner molds 230 and 240 disposed at right angles so that the ends face each other, and the corner inner molds 260 are formed in the corner spaces 201. It is arranged. The outer end of the corner inner mold 260 is a curved press surface. Moreover, the corner outer mold 250 which has the press surface facing inward is arrange | positioned outside the corner inner mold 260. As shown in FIG. In the press surface of the corner outer mold 250, a recess 251 is formed to face the outer leading portion of the corner inner mold 260.

Each inner mold (230, 240), each outer mold (210, 220), corner inner mold 260 and corner outer mold 250, the mold tightening and mold opening by the hydraulic expander (expander) mechanism It is supposed to be. At the time of tightening, the inner molds 230 and 240 move outwards, and the corner inner molds 260 obliquely move outwards, and the outer molds 210 and 220 move inwards and the corner outer molds 250 respectively. These are inclined to move inwards, respectively. When the mold is opened, the inner molds 230 and 240 move inwards and the corner inner molds 260 obliquely move inwards, and the outer molds 210 and 220 move outwards, and the corner outer molds ( 250) move obliquely outwards, respectively.

In such a mold mechanism, a steel plate cylinder 120 (see FIG. 3), which is the original shape of the trunk portion 10, is set between the inner molds 230 and 240 and the outer molds 210 and 220. )do. In this state, each inner mold (230, 240) is moved outward. As a result, when the corner space 201 is widened, the corner inner mold 260 moves outwards, and the corner outer mold 250 moves inward, so that the corner inner mold 260 and the corner outer mold 250 Mold tightening is done. Thereby, as shown in FIG. 6, by the press surface in which the outer front end of the corner inner mold 260 and the recessed part 251 of the corner outer mold 250 were formed, of the cylinder 120 (the trunk | drum 10) The crown part of the corner part is fitted, and the vertical reinforcement convex beads 15a and 15b which match the recessed part 251 of the corner outer mold 250 are formed on the corner part of the said corner part.

Thereafter, the outer molds 210 and 220 are moved inwards, and mold clamping of the inner molds 230 and 240 and the outer molds 210 and 220 is performed. As a result, as shown in FIG. 6, the cylindrical body 120 is molded so as to have a regular outer shape (approximately rectangular shape) as the trunk portion 10, and each inner mold 230, 240 and each outer mold 210, On the portion to be fitted by 220, the concave-convex shapes (for example, the recesses 231 and 241) formed on the press surfaces of the respective inner molds 230 and 240 and the press surfaces of the outer molds 210 and 230, respectively. Various reinforcement beads (e.g., vertical reinforcement beads 12) matching the formed irregularities (e.g., the convex portions 211 and 221) are formed.

When the molding is finished, the mold opening of the corner inner mold 260 and the corner outer mold 250 is made, and then the mold opening of each inner mold 230 and 240 and the outer mold 210 and 220 is made. . And the cylinder body 120 (body part 10) formed into the normal external shape as the body part 10 of each shape can, and in which the various reinforcement beads (refer FIG. 1, FIG. 2, and FIG. 4) was formed in each inside is carried out. It is taken out between the molds 230 and 240 and each outer mold 210 and 220.

In addition, in the above-mentioned press working, after the mold tightening of the corner inner mold 260 and the corner outer mold 250 is performed, the mold tightening of the inner molds 230 and 240 and the outer molds 210 and 220 is performed. Although the order of mold tightening is reverse, that is, the mold clamping of the corner inner mold 260 and the corner outer mold 250 after the mold tightening of each of the inner molds 230 and 240 and the outer molds 210 and 220 are performed. This may be done.

Each shape can which concerns on 2nd Embodiment of this invention is comprised as shown in FIG. Each shape can which concerns on this 2nd Embodiment is a figure except for the point that the number and formation position of the longitudinal reinforcement convex beads formed in each of the corner parts 18a, 18b, 18c, and 18d differ. It is the same as each shape can which concerns on 1st Embodiment shown to FIG.

In FIGS. 7A and 7B, each of the corner portions 18a, 18b, 18c, and 18d is joined along the top portion 18top of the corner portions and extends from the end portion on the top plate 20a side. The longitudinally reinforced convex beads 15a1 and 15a2 are formed, and two longitudinally reinforced convex beads 15b1 and 15b2 are formed so as to be paired with them and extend from an end portion on the bottom plate 20b side. Thereby, each of the corner portions 18a, 18b, 18c, and 18d is reinforced by two pairs (two rows) of longitudinally reinforcing convex beads 15a1, 15b1 and 15a2, 15b2. The shape including the width and length of each of the longitudinally reinforced convex beads 15a1, 15b1, 15a2, and 15b2 obtains the desired durability against the unloading and impact loads at the corner portions 18a, 18b, 18c, and 18d. Is determined to be. Further, as shown in Fig. 7 (b), the arrangement pitch P1 of the vertically reinforced convex beads 15a1 and 15a2 and 15b1 and 15b2 arranged side by side is equal to the width of the vertically reinforced convex beads. The vertical reinforcement beads 15a1 and 15a2 and 15b1 and 15b2 arranged side by side are joined along the crown 18top.

(Strength test results)

In FIG. 8, strength with respect to each shape can (NO. 1) which concerns on 1st Embodiment of this invention mentioned above, and each shape can (NO. 3) which concerns on 2nd Embodiment of this invention. The test results are shown together with the comparative examples (NO. 2, NO. 4 to NO. 6). The width | variety of the longitudinal reinforcement convex bead in each shape can which concerns on embodiment of each this invention was 8 mm, and length was set to 50 mm.

Referring to FIG. 8, each shape can NO. 1 according to the first embodiment of the present invention has become most preferable in terms of durability against its single load and impact load. This is assumed to be due to each of the corner portions 18a, 18b, 18c, 18d being reinforced by a pair of longitudinally reinforcing convex beads 15a, 15b. On the other hand, the longitudinal reinforcement is carried out to the crown part 18a of the corner part 18 so that it may extend to the whole longitudinal direction (from the beginning to the end) of the trunk | drum 10 from the edge part on the top plate 20a side to the edge part on the bottom plate 20b side. Even when convex beads (width: 8 mm) were formed, good results were not obtained regarding durability against unloading (see NO. 2). Moreover, the shape can (NO. 3) which concerns on 2nd Embodiment of this invention obtained especially favorable result regarding durability with respect to an impact load. In addition, as shown in Figs. 9A and 9B, each of the corner portions 18a, 18b, 18c, and 18d is spaced in two rows (two pairs) apart from each other with their top portions 18top interposed therebetween. Each of the shape cans (NO. 4) formed with longitudinally reinforced convex beads 15a1, 15b1 and 15a2, 15b2 (width: 8 mm, length: 50 mm, pitch P2: 24 mm) is particularly at least for durability against single load. Good results were not obtained.

Moreover, instead of the said vertical reinforcement convex bead 15a, 15b (refer FIG. 1, FIG. 2, and FIG. 4), the concave shape reinforcement bead concave inward from the outer side of the trunk | drum 10 (width: 8mm, length: 50 mm) and the longitudinal direction of the trunk portion 10 from the end portion on the top plate 20a side to the end portion on the bottom plate 20b side in the case of forming (NO. 6) and such concave reinforcement beads (width: 8 mm). Good results in terms of durability against unloading and impact loads when formed on the tops of the corners 18top of the corners 18a, 18b, 18c, and 18d so as to extend all over (from the beginning to the end) (NO. 5). Was not obtained. This is presumed that in the case of the concave reinforcement beads, when the longitudinal load is applied, the corner portion 18 cannot effectively prevent the inner bending thereof.

As described above, a pair of longitudinals formed to extend from each of an end portion on the top plate 20a side and an end portion on the bottom plate 20b side on the top portion 18top of each corner portion 18a, 18b, 18c, 18d. According to each shape can (1st embodiment, strength test result NO. 1) which reinforced the said corner part 18 by the reinforcement convex beads 15a and 15b, even if the steel plate used as a material becomes thinner, it is a corner especially. In the parts 18a, 18b, 18c, and 18d, it becomes possible to obtain desired durability against unloading and impact loads. Moreover, two longitudinally reinforced convex beads 15a1 and 15a2 are formed so that they are joined along the top part 18top of each corner part 18a, 18b, 18c, and 18d, and are extended from the edge part by the top plate 20a side, According to each shape can (second embodiment, strength test result NO. 3) in which two longitudinally reinforced convex beads 15b1 and 15b2 are formed so as to be paired with them and extend from an end portion on the bottom plate 20b side, Even if the steel sheet used as the material is made thin, it is possible to obtain desired durability against uneven load and impact load, particularly in the corner portions 18a, 18b, 18c, and 18d.

In each of the above-mentioned shape cans, in particular, the bottom plate from the end portion of the top plate 20a side at the boundary portion with the corner portion of the side wall surface which extends to both sides of each corner portion 18 (18a, 18b, 18c, 18d), respectively. Since the longitudinal reinforcement beads 12 extending to the end portion on the side of the (20b) side are formed, each corner portion 18 is effectively prevented from being deformed or buckled as it collapses with deformation from the adjacent portion. I can do it.

In addition, a third embodiment of the present invention will be described.

Each shape can which concerns on 3rd Embodiment of embodiment of this invention is comprised as shown to FIG. 10 and FIG. 10 is the top view (a) and front view (b) which looked at each shape can which concerns on 3rd Embodiment of this invention from the top, and FIG. 11 is a perspective view of each shape can. Each shape can which concerns on this 3rd Embodiment is the vertical which pairs with one corner part 18b among four corner parts 18a, 18b, 18c, and 18d as shown to FIG. 10 and FIG. Since the reinforcement convex beads 15a and 15b are not formed, it is different from each shape can which concerns on above-mentioned 1st Embodiment.

Each of these shape cans (so-called 18-liter cans) is joined to the upper end of the substantially rectangular body portion 10 by the top plate 20a (end plate) in a similar manner to the first embodiment described above by seaming. The bottom plate 20b (end plate) is joined to the lower end by a winding body. Moreover, also in each side wall (panel) of the trunk | drum 10, like the 1st Embodiment mentioned above, two longitudinal reinforcement beads 12, two horizontal reinforcement beads 14, and rectangular reinforcement. The part 16 is formed.

The trunk | drum 10 of each shape can is manufactured according to the procedure as shown to FIG. 12 and FIG. 13, for example.

A rectangular metal plate (steel plate) 100 having a portion corresponding to four side walls (panel) as shown in Fig. 12A is bent, as shown in Fig. 12B. In this bending process, the metal plate 100 is bent so that the edges of both ends may be overlapped at the corner part of a substantially rectangular shape, and the overlapping edges are joined by welding. Thereby, the substantially rectangular cylindrical body 130 as shown in FIG. 13 is formed. As shown in FIG. 14 (expanded detail of the area Ec of FIG. 13), the joint part (side seam portion) by which both edges of the metal plate 100 overlapped and welded to one corner part of the cylinder 130 is welded. 19 is formed to extend in the longitudinal direction of the cylinder 130.

10 and 11, the three corner portions 18a, 18c, and 18d of the trunk portion 10, in which the above-described cylinder 130 is originally formed, are continuously formed in a predetermined curved shape, while 1 The side core part 19 mentioned above is formed in the four corner parts 18b. On the top part 18top which extends in the longitudinal direction of each of the three corner parts 18a, 18c, and 18d in which the side core part 19 is not formed, it is the top plate 20a similarly to 1st Embodiment mentioned above. The longitudinal reinforcement convex beads 15a are formed so as to extend a predetermined length from the end portion at the side), and the longitudinal reinforcement convex beads 15b are formed in pairs with the longitudinal reinforcement convex beads 15a. Each longitudinally reinforced convex bead 15a, 15b has a convex shape projecting outward from the inside of the trunk portion 10 (see FIG. 4 (b)).

In addition, although the side core part 19 is formed in the other corner part 18b of the trunk part 10 as mentioned above, this side core part 19 is made of the metal plate 100 of FIG. It is formed by overlapping welding of both edges (see Fig. 14), and has a structure in which substantially two metal sheets are overlapped.

The trunk | drum 10 of such a structure is manufactured by the press apparatus (mold mechanism) from the cylinder 130 shown in FIG. For the three corner portions 18a, 18c, and 18d in which the pair of longitudinally reinforcing convex beads 15a and 15b are to be formed, the same mold mechanism portion as in the first embodiment described above (Fig. 5 and 6). Moreover, about the corner part 18b in which the side core part 19 was formed, it is formed by the metal mold | die mechanism part as shown in FIG.

In FIG. 16, the metal mold | die mechanism part which should form the corner part 18b in which the side core part 19 was formed is the metal mold | membrane part part which should form the corner part in which the above-mentioned side core part 19 is not formed (refer FIG. 5). Similarly, the inner mold 230 having the concave portion 231 and the outer mold 210 having the convex portion 211 are disposed to face each other, and the inner mold 240 having the concave portion 241 and the convex portion 241 are formed. The outer mold 220 in which the portion 221 is formed is disposed to face each other. Moreover, the corner space 201 is formed in the opposing angle | corner part of the inner molds 230 and 240 similarly to the metal mold | die mechanism part (refer FIG. 5) which should form the corner part in which the side core part 19 is not formed. It is formed, and the corner inner mold 280 is arrange | positioned at the corner space 201. As shown in FIG. The outer leading end of the corner inner mold 280 is a press surface curved in a convex shape based on the curvature of the corner portion having the side seam 19 to be molded. Moreover, the corner outer mold 270 which has the press surface facing inward is arrange | positioned outside the corner inner mold 280. As shown in FIG. The press surface of the corner outer mold 270 has a concave curved shape (concave curved surface 271) corresponding to the convex curved shape of the outer tip portion of the corner inner mold 280.

In the whole mold mechanism, each inner mold 230, 240, each outer mold 210, 220, corner inner mold 260 (see FIG. 5), 280 and corner outer mold 250 (see FIG. 5), 270 is mold tightening and mold opening by a hydraulic expander mechanism. At the time of tightening, the inner molds 230 and 240 move outwards, and the corner inner molds 260 (see FIG. 5) and 280 obliquely move outwards, and the outer molds 210 and 220 move inward. , Corner outer molds 250 (see Fig. 5), 270 are moved obliquely inward. When the mold is opened, the inner molds 230 and 240 move inward, the corner inner molds 260 (see FIG. 5) and 280 obliquely move inwards, and the outer molds 210 and 220 Outward, corner outer molds 250 (see FIG. 5) and 270 move obliquely outwards, respectively.

In such a metal mold | die mechanism, the steel plate body 130 (refer FIG. 13) made into the original shape of the trunk | drum 10 is set between the inner molds 230 and 240 and the outer molds 210 and 220. As shown in FIG. In this state, each of the inner molds 230 and 240 first moves outward. As a result, when the corner space 201 becomes wider, the corner inner molds 260 (see FIG. 5) and 280 move outwards, and the corner outer molds 250 (see FIG. 5) and 270 move inwards, thereby turning the corners. Mold tightening of the inner mold 260 and the corner outer mold 250 and mold tightening of the corner inner mold 280 and the corner outer mold 270 are made. Thereby, the top of the corner part of the cylinder body 130 (body part 10) by the press surface in which the outer tip part of the corner inner mold 260 and the recessed part 251 of the corner outer mold 250 was formed is The vertical reinforcement convex beads 15a and 15b which fit in and fit the recessed part 251a of the corner outer mold 250 are formed on the top part 18top of the said corner part (refer FIG. 6).

At this time, by tightening the mold of the corner inner mold 280 and the corner outer mold 270 disposed in the corner portion having the side core portion 19, the side core portion 19 of the cylinder 130 is shown in FIG. 17. The corner part to contain is tightened tightly from both sides, and the curved shape of the said corner part of the cylinder 130 is maintained.

Thereafter, the outer molds 210 and 220 are moved inwards, and mold clamping of the inner molds 230 and 240 and the outer molds 210 and 220 is performed. Thereby, as shown to FIG. 6 and FIG. 17, while the cylinder 130 is shape | molded so that it may become a normal outline shape (approximately rectangular shape) as the trunk | drum 10, each inner mold 230, 240, and each outside Concave-convex shapes (for example, recesses 231 and 241) formed in the press surfaces of the respective inner molds 230 and 240 at the portions sandwiched by the molds 210 and 220 and the outer molds 210 and 230, respectively. Various reinforcement beads (e.g., vertical reinforcement beads 12) conforming to the uneven shape (e.g., the convex portions 211 and 221) formed on the press surface thereof are formed.

When the molding is finished, the mold opening of the corner inner mold 260 and the corner outer mold 250 and the mold opening of the corner inner mold 280 and the corner outer mold 270 are made, and then each inner mold ( 230, 240 and the mold opening of each outer mold (210, 220) is made. And the cylindrical body 130 which becomes a normal external shape as the trunk | drum 10 of each shape can, and in which the various reinforcement beads (refer FIG. 10, FIG. 11, FIG. 4, and FIG. 15) was formed, each inner mold 230, It is taken out between 240 and each outer mold 210,220.

In addition, in the above-mentioned example, the cylindrical reinforcement bead 12, the horizontal reinforcement bead 14, and the rectangular reinforcement part 16 were formed from the metal plate 100 together with the vertical reinforcement convex beads 15a and 15b, respectively. 130, but the reinforcement portions other than the vertical reinforcement convex beads 15a and 15b (the vertical reinforcement beads 12, the horizontal reinforcement beads 14 and the rectangular reinforcement portion 16, etc.) are made of metal sheet 100 ) (See Fig. 12 (a)). In this case, the metal plate 100 of the state in which the reinforcement part was formed is bent (refer FIG. 12 (b)).

Each shape can which concerns on 4th Embodiment of this invention is comprised as shown in FIG. Each shape can which concerns on this 4th Embodiment is 2nd Embodiment (FIG. Mentioned above) in each of the three corner parts 18a, 18c, 18d in which the side core part 19 is not formed. 7), two pairs of longitudinally reinforced convex beads 15a1 and 15a2 are formed. In addition, each shape can which concerns on this 4th Embodiment is the point where two pairs of longitudinally reinforced convex beads 15a1 and 15a2 are formed in each of the three corner parts 18a, 18c, and 18d in this way. Except for the same, each shape can according to the third embodiment described above is the same.

(Strength test results)

Strength test with respect to each shape can (refer FIG. 10-17) concerning 3rd Embodiment of this invention mentioned above, and each shape can (refer FIG. 18) concerning 4th Embodiment of this invention. Was performed. In each of the unloading test, the test of the total load, and the test of the corner vertical impact load (observing the concaveness of the panel portion and the trace of deformation in the horizontal direction), each shape can according to the third embodiment is, It had the durability performance substantially equivalent to each shape can (NO.1 in FIG. 8) which concerns on 1st Embodiment. Moreover, each shape can which concerns on 4th Embodiment also had the durability performance substantially equivalent to each shape can (NO.3 in FIG. 8) which concerns on 2nd Embodiment.

As described above, even if one pair or two pairs of longitudinally reinforced convex beads are not formed outside the other corner portions 18a, 18c, and 18d except for one corner portion 18b, one pair or two in all four corner portions. The durability characteristic which is substantially equivalent to the case where a pair of longitudinally reinforced convex beads was formed is obtained by the corner part 18b in which the side core part 19 was formed (the longitudinal reinforced convex bead is not formed), and the side core part 19 It is guessed that it originates in what is strengthened by joining substantially two metal plate materials (steel plate).

Thereby, the edge part of the top plate 20a side, and the bottom plate 20b side on the top part 18top of each of the three corner parts 18a, 18c, and 18d except the corner part 18b which has the side core part 19 The corner portion 18b having the side core portion 19 while reinforcing the corner portions 18a, 18c, and 18d by a pair of longitudinally reinforced convex beads 15a and 15b formed to extend from each of the ends of According to each shape can (third embodiment) which can be reinforced by the side core part 19, even if the steel plate used as a material becomes thinner, it is comfortable in especially corner part 18a, 18b, 18c, 18d. It is possible to obtain the desired durability against heavy and impact loads. Moreover, it joins along the top part 18top of each of the three corner parts 18a, 18c, and 18d except the corner part 18b which has the side core part 19, and extends so that it may extend from the edge part by the top plate 20a side. Each of the shape cans (fourth) in which two longitudinally reinforced convex beads 15a1 and 15a2 are formed, and two longitudinally reinforced convex beads 15b1 and 15b2 are formed so as to pair with them and extend from an end portion on the bottom plate 20b side. Embodiment) also makes it possible to obtain the desired durability against unloading and impact loads, particularly in the corner portions 18a, 18b, 18c, and 18d, even if the steel sheet serving as the material is made thin.

In addition, the durability is approximately equivalent to the four corner portions 18a, 18b, 18c, and 18d only by forming longitudinal reinforcement convex beads in the three corner portions 18a, 18c, and 18d except for the one corner portion 18b. Since performance can be obtained, each shape can with high durability can be manufactured more easily.

Moreover, even if each shape can which the longitudinal reinforcement convex bead is not formed outside each corner part 18a, 18c, 18d except the corner part 18b with the side shim 19 is especially each corner part 18 (18a), Vertical reinforcing beads 12 extending from the end portion of the top plate 20a side to the end portion of the bottom plate 20b side at the boundary portion of the corner portion 18 of the side wall surface that extends to each of the two sides of the side surfaces 18b, 18c, and 18d. Since the corner portions 18 are formed, the corner portions 18 can be effectively prevented from being deformed or buckled as if they were collapsed due to the deformation at the adjacent portion or the like.

As described above, each shape can according to the present invention has the effect that even if the steel sheet serving as the material is made thinner, the desired durability against the unloading load can be obtained, especially at the corners, so that each can be a so-called 18 liter can. It is useful as a shape can.

Claims (8)

As each shape can formed by joining an end plate to each open | release end of each torso part which becomes a rectangular cylinder, A can of each shape, wherein a pair of longitudinally reinforcing convex beads (15a, 15b) extending from each of the both ends and protruding outward are formed on the top of each corner portion of the trunk portion. delete delete The method of claim 1, A longitudinal reinforcement bead extends from a joining portion with one end plate to a joining portion with the other end plate at a boundary portion with the corner portion of the side wall surface leading to each of both sides of the corner portion in the trunk portion. Each shape can characterized by the above-mentioned. As each shape can formed by overlapping and joining the both edges of a rectangular metal plate material, and joining an end plate to each open end of the trunk part which becomes a rectangular cylinder formed so that the said junction part may become a corner part, Each corner portion except the corner portion with the joint portion of the trunk portion has a pair of longitudinally reinforcing convex beads 15a, 15b extending from each of the both ends and protruding outward on the crown portion thereof. Each shape can characterized by the above. delete delete The method of claim 5, A longitudinal reinforcement bead extending from a joining portion with one end plate to a joining portion with the other end plate is formed at a boundary portion with the corner portion of the side wall surface that extends to each side of each corner portion in the trunk portion. Can shape each.

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