Tray-like member and manufacturing method for tray-like member

Abstract

To provide a tray-like member configured so that end portions of a wall part can be made to tightly adhere to each other; and a manufacturing method for a tray-like member.SOLUTION: A tray-like member is formed by: using metal plate material 11 formed, in a substantially cross shape, of a rectangular part 12 in a rectangular shape, four side edge parts 13 protruding outward from an outer edge 12a of the rectangular part 12 and a thick wall part 14 provided between the side edge parts 13 and 13 arranged adjacent to each other in a circumferential direction; providing four wall parts 3 each of which has a bottom top plate part 2 formed of a portion of the rectangular part 12, and each of which is formed around the bottom top plate part 2 by press-forming an outer peripheral portion of the rectangular part 12, the side edge parts 13 and the thick wall part 14: connecting the wall parts 3 and 3 arranged adjacently in the circumferential direction to each other at connection parts 4; and forming portions at the opposite side of the bottom top plate part 2 in the connection parts 4 through squeezing, and forming portions at the opposite side of the bottom top plate part 2 in the connection parts 4 through punching to cause faces 3b and 3b in the circumferential direction of the wall parts 3 to tightly adhere to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tray-shaped member and a method for manufacturing the tray-shaped member.

Background Art

[0002] Conventionally, when forming a metal tray-shaped member by pressing, the bottom plate portion of the plate material is moved and squeezed with a punch and a die to form a wall portion around the bottom plate.

[0003] However, when trying to ensure the height of the wall portion, deep drawing is performed, the wall portion becomes thinner, it becomes difficult to ensure the plate thickness and flatness of the wall portion, and there is a risk that warping or bulging may occur in the wall portion, or cracks may occur at corners or the like.

[0004] As a solution to this problem, when forming the plate material into a substantially cross shape, forming the corners into an arc shape, and raising the four sides with respect to the bottom to form four wall portions around the bottom, drawing is performed only in a certain range close to the bottom, and the opposite sides are butted against each other to narrow the drawing range to avoid thinning (see Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, since the portions other than the drawing are formed so that the ends of the wall portions are orthogonal to each other, it is difficult to bring the ends into close contact with each other without gaps, and there is a problem that large gaps are formed.

[0007] Even if they can come into contact, since the ends are in line contact with each other, there is a problem that it is difficult to ensure the airtightness of the tray-shaped member and the like.

[0008] Therefore, an object of the present invention is to provide a tray-shaped member capable of bringing the ends of the wall portions into close contact with each other and a method for manufacturing the tray-shaped member.

Means for Solving the Problems

[0009] In order to solve the above problems, the present invention uses a metal plate material formed in a substantially cross shape with a rectangular portion having a rectangular shape, four side edge portions protruding outward in the outer edge direction of the rectangular portion, and a web portion provided between the side edge portions adjacent to each other in the circumferential direction. It has a bottom and top plate portion formed from a part of the rectangular portion, and four wall portions formed by pressing and forming the outer peripheral portion of the rectangular portion, the side edge portion, and the web portion are provided around the bottom and top plate portion. Wall portions adjacent to each other in the circumferential direction are connected at a connecting portion. A tray-shaped member characterized in that the side on the bottom and top plate portion side in the connecting portion is formed by drawing, and the side opposite to the bottom and top plate portion in the connecting portion is formed by punching so that the end faces in the circumferential direction of the wall portions are in close contact with each other.

[0010] Further, the connecting portion may be formed in an arc shape by the ends of two abutting wall portions.

[0011] Further, a plate material forming step of forming a metal plate material formed in a substantially cross shape with a rectangular portion having a rectangular shape, four side edge portions protruding outward in the outer edge direction of the rectangular portion, and a web portion provided between the side edge portions adjacent to each other in the circumferential direction, After the plate material forming step, a holding step of holding a part of the rectangular portion by a support member from both sides, After the holding step, a forming member that moves relative to the support member presses the outer peripheral portion of the rectangular portion, the edge portion, and the web portion to form a bottom and top plate portion from a part of the rectangular portion, and at the same time, four wall portions and a connecting portion where the ends of the wall portions adjacent to each other in the circumferential direction are connected are formed around the bottom and top plate portion. In the connecting portion, the bottom and top plate portion side is integrally formed by drawing, and in the connecting portion, the side opposite to the bottom and top plate portion is characterized in that the end faces in the circumferential direction of the wall portions are brought into close contact with each other by punching. A method for manufacturing a tray-shaped member may be used.

[0012] Further, in the punching process, the connecting portion may be formed in an arc shape by the ends of two abutting wall portions.

[0013] Further, the support member may be fixed and the forming member may be moved.

Advantages of the Invention

[0014] The present invention uses a metal plate material formed in a substantially cross shape by a rectangular portion, four side edge portions, and a web portion provided between the side edge portions adjacent to each other in the circumferential direction. It has a bottom and top plate portion formed from a part of the rectangular portion, and four wall portions formed by pressing and forming the outer peripheral portion of the rectangular portion, the side edge portions, and the web portion around the bottom and top plate portion. The wall portions adjacent to each other in the circumferential direction are connected at the connecting portion. The bottom and top plate portion side in the connecting portion is formed by drawing, and the side opposite to the bottom and top plate portion in the connecting portion is formed by bringing the end faces in the circumferential direction of the wall portions into close contact with each other by punching. As a result, the wall thickness of the wall portion can be ensured, the occurrence of warping and bulging of the wall portion, and cracking of the connecting portion can be suppressed, and airtightness and the like can be ensured.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0016] The embodiments according to the present invention will be described based on the examples shown in the drawings. [Example 1] FIG. 1 is a perspective view of a tray-shaped member 1 according to Example 1 of the present invention, and FIG. 2 is a top view thereof.

[0017] As shown in FIGS. 1 and 2, the tray-shaped member 1 is formed in a tray shape by a rectangular bottom and top plate portion 2 and four wall portions 3 provided at each outer edge 2a of the bottom and top plate portion 2. The space between the outer edge 2a of the bottom and top plate portion 2 and the side portion of the wall portion 3 on the bottom and top plate portion 2 side is integrally formed with an arc-shaped curvature. The circumferential end portions 3a, 3a of the circumferentially adjacent wall portions 3, 3 are connected by an arc-shaped connecting portion 4.

[0018] The side of the connecting portion 4 on the bottom and top plate portion 2 side is formed by the drawing process described later, and the end portions 3a, 3a of the circumferentially adjacent wall portions 3 are integrally formed without a break. The side of the connecting portion 4 opposite to the bottom and top plate portion 2 side is formed by the punching process described later, and the end faces 3b, 3b of the circumferential end portions 3a, 3a of the circumferentially adjacent wall portions 3, 3 are in surface contact with each other.

[0019] As shown in FIG. 1, the wall portion 3 is formed such that its height is substantially the same throughout the circumferential direction.

[0020] The tray-shaped member 1 can be used for a container for accommodating contents or a lid for covering the container, etc. In this embodiment, it is used as a lid for a container for accommodating a battery. The bottom and top plate portion 2 constitutes the bottom plate of the container or the top plate of the lid, etc.

[0021] Next, the manufacturing method of the tray-shaped member 1 will be described.

[0022] First, a sheet forming step is performed to form a metal sheet 11 as shown in FIG. 3 by any forming method.

[0023] The sheet 11 has a rectangular portion 12 in a rectangular shape, and side edge portions 13 are formed protruding in the outer side direction of the rectangular portion 12 from each side which is the outer edge 12a of the rectangular portion 12. Between the side edge portions 13, 13 adjacent in the circumferential direction, there is a thin portion 14 which protrudes in the outer side direction from the outer edge 12a of the rectangular portion 12 and has a smaller protruding amount from the outer edge 12a of the rectangular portion 12 than the side edge portions 13. The outer shape of the thin portion 14 is formed in an arc shape. The size of the thin portion 14 is set arbitrarily.

[0024] The sheet 11 is formed in a substantially cross shape as shown in FIG. 3 by the rectangular portion 12, the side edge portions 13, and the thin portion 14. In FIG. 3, the shape of the tray-like member 1 is shown by a two-dot chain line.

[0025] Next, with the first support member 16 located below and the second support member 17 located above being separated from each other, as shown in FIG. 4, at least the central portion of the rectangular portion 12 of the sheet 11 is placed on the first support member 16. Then, by a first moving portion (not shown), the second support member 17 is moved downward, and a portion which is a part of the rectangular portion 12 and forms the bottom and top plate portion 2 described later is clamped and held by the first support member 16 and the second support member 17 as shown in FIG. 5 in a holding step.

[0026] Next, the positions of the first support member 16 and the second support member 17 are fixed, and as shown in FIG. 6, a forming member 18 formed around the second support member 17 is moved downward by a second moving portion (not shown). The forming member 18 and the first support member 16 press around the rectangular portion 12, the side edge portions 13, and the thin portion 14 to form the bottom and top plate portion 2 by a part of the rectangular portion 12, and a wall portion forming step is performed to form four wall portions 3 around the bottom and top plate portion 2 and a connecting portion 4 where the circumferential end portions 3a, 3a of the wall portions 3, 3 adjacent in the circumferential direction are connected.

[0027] As shown in FIGS. 4 to 6, the forming member 18 has a through hole 18a penetrating vertically in the central portion, and the first support member 16 can move vertically within the through hole 18a.

[0028] By moving the forming member 18 downward and pressing the periphery of the rectangular portion 12, the side edge portion 13, and the meat portion 14 with the forming member 18 and the first support member 16, these are subjected to drawing processing, and the top and bottom plate portions 2 of the circumferential end portions 3a, 3a of the circumferentially adjacent wall portions 3 are integrally formed without a break, and the top and bottom plate portions 2 of the connecting portion 4 formed in an arc shape are formed.

[0029] Also, by moving the forming member 18 downward and pressing the side edge portion 13 and the meat portion 14 with the forming member 18 and the first support member 16, these are subjected to punching processing, and the end faces 3b, 3b of the circumferential end portions 3a, 3a of the circumferentially adjacent wall portions 3, 3 are in surface contact and adhere to each other, and the side opposite to the top and bottom plate portions 2 of the connecting portion 4 is formed.

[0030] The second support member 17 and the forming member 18 are moved upward to obtain the tray-shaped member 1.

[0031] As described above, by forming the top and bottom plate portions 2 of the connecting portion 4 within the range of the drawing process, and taking a part of the range of the drawing process, it is possible to ensure the plate thickness of the wall portion 3, and it is possible to suppress the occurrence of warping and bulging of the wall portion 3 and cracking of the connecting portion 4.

[0032] Also, by forming the side opposite to the top and bottom plate portions 2 of the connecting portion 4 by punching, the end faces 3b, 3b of the circumferential end portions 3a, 3a of the circumferentially adjacent wall portions 3, 3 can be brought into surface contact and adhered to each other, and the airtightness, liquid tightness, etc. of the tray-shaped member 1 can be ensured.

[0033] [Example 2] In the above-described Example 1, the height of the wall portion 3 was formed to be substantially the same throughout the circumferential direction. However, for example, as shown in FIG. 7, the height of the connecting portion 4 may be made lower than the height of the surrounding wall portion 3, or the height of the wall portion may not be uniform.

[0034] Since other configurations and structures are the same as those in the above-described Example 1, the description thereof is omitted.

[0035] Also in this Example 2, the same operations and effects as those in the above-described Example 1 are achieved.

[0036] [Example 3] In the above-described Example 1, the positions of the first support member 16 and the second support member 17 were fixed and the forming member 18 was moved downward. However, the forming member 18 may be moved relative to the support members 16 and 17. For example, the forming member 18 may be fixed at a predetermined position and both the first support member 16 and the second support member 17 may be moved upward.

[0037] Since other configurations and structures are the same as those in the above-described Examples 1 and 2, the description thereof is omitted.

[0038] Also in this Example 3, the same operations and effects as those in the above-described Examples 1 and 2 are achieved.

Explanation of Reference Numerals

[0039] 1 Tray-shaped member 2 Bottom and top plate portion 3 Wall portion 4 Connecting portion 11 Plate material 12 Rectangular portion 13 Side edge portion 14 Thickness portion 16, 17 Support members 18 Forming member

Claims

1. A metal plate is used, which has a rectangular portion in a rectangular shape, four side edge portions protruding outward from the outer edge of the rectangular portion, and a meat portion provided between the side edge portions adjacent to each other in the circumferential direction and formed in a substantially cross shape. It has a bottom and top plate portion formed from a part of the rectangular portion, and four wall portions are provided around the bottom and top plate portion, which are formed by pressing and forming the outer peripheral portion of the rectangular portion, the side edge portions, and the meat portion. The wall portions adjacent to each other in the circumferential direction are connected at the connecting portion. A tray-shaped member, characterized in that the side of the bottom and top plate portion in the connecting portion is formed by drawing, and the side opposite to the bottom and top plate portion in the connecting portion is formed by punching so that the end faces in the circumferential direction of the wall portions are in close contact with each other.

2. The tray-shaped member according to Claim 1, characterized in that the connecting portion is formed in an arc shape by the ends of two abutting wall portions.

3. A sheet metal forming step of forming a metal plate having a rectangular portion in a rectangular shape, four side edge portions protruding outward from the outer edge of the rectangular portion, and a meat portion provided between the side edge portions adjacent to each other in the circumferential direction and formed in a substantially cross shape. After the sheet metal forming step, a holding step of holding a part of the rectangular portion by a support member from both sides. After the holding step, a forming member that moves relative to the support member presses the outer peripheral portion of the rectangular portion, the edge portion, and the meat portion to form a bottom and top plate portion from a part of the rectangular portion, and at the same time, forms four wall portions around the bottom and top plate portion and a connecting portion where the ends of the wall portions adjacent to each other in the circumferential direction are connected. A method for manufacturing a tray-shaped member, characterized in that in the connecting portion, the side of the bottom and top plate portion is integrally formed by drawing, and in the connecting portion, the side opposite to the bottom and top plate portion is formed by punching so that the end faces in the circumferential direction of the wall portions are in close contact with each other.

4. The method for manufacturing a tray-shaped member according to Claim 3, characterized in that in the punching process, the connecting portion is formed in an arc shape by the ends of two abutting wall portions.

5. The method for manufacturing a tray-shaped member according to Claim 3 or 4, characterized in that the support member is fixed and the forming member is moved.

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