JP6978037B2 - How to make a container - Google Patents

Description

The present invention relates to a method for manufacturing a container having a groove-shaped container base having a pair of first side walls facing each other and a pair of second side walls closing both ends of the container base.

Conventionally, as a container of this type, a reinforcing rail is fitted to the upper edge of a pair of first side walls, and the first side wall is fitted to a groove of a pair of connecting protrusions protruding from both side edges of each second side wall. It is known that the side edge portion of the above and the end portion of the reinforcing rail are fitted together. This container is provided with a through hole through which the reinforcing rail, the connecting ridge, and the first side wall are combined, and the bar member (for example, a rivet) is fixed through the through hole (for example, a patent). See Document 1).

Japanese Unexamined Patent Publication No. 2015-93706 (paragraph [0026], FIG. 3)

By the way, in the above-mentioned conventional container, for example, the through hole of the connecting side wall is formed when the connecting side wall is molded by the resin molding die, and the through hole of the first side wall is formed by piercing the bar member. To. On the other hand, the through hole of the reinforcing rail is drilled by, for example, a drilling machine of a drilling machine, and the drilling work is troublesome, so that there is a problem that the manufacturing cost is high.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a container capable of suppressing the manufacturing cost.

The invention of claim 1 made to achieve the above object is to bend a resin sheet into a groove shape and close a container base having a pair of first side walls facing each other and an end portion of the container base. A pair of second side walls, a pair of reinforcing rails of the same shape that form a groove with an open bottom surface and are fitted to the upper edge of the first side wall, and project from both side edges of each of the second side walls. Penetrates a connecting ridge having a groove in which the side edge of the first side wall and the end of the reinforcing rail are fitted, and a portion where the reinforcing rail, the connecting ridge, and the first side wall overlap. A method for manufacturing a container including a through hole and a bar member fixed so as to be passed through the through hole, which is one of the reinforcing rails when the through hole is drilled in the reinforcing rail. Between the pair of facing walls of one reinforcing rail, one facing wall of the second reinforcing rail, which is the other reinforcing rail, is received, and one facing wall of the first and second reinforcing rails is received. The first and second reinforcing rails are collectively clamped so that the facing walls overlap each other, and the through holes are collectively drilled at the center of the facing walls in the vertical direction or below the center. It is a method of manufacturing a container to be used.

In the manufacturing method of the container according to claim 1, between the opposing walls of a pair of first reinforcing rail which is one of the reinforcing rails of the pair of reinforcing rail, a second reinforcing rail which is the other of the reinforcing rail and receiving the one opposing wall, and a pair of opposing walls of the first reinforcing rail and collectively superposing the opposing walls of a pair of second reinforcing rails clamp, a pair of reinforcing rail Through holes can be formed in both of them at once. As a result, the drilling work for the reinforcing rail is reduced, and the manufacturing cost can be suppressed. In particular, if the through hole is arranged in the center of the pair of facing walls of the reinforcing rail in the vertical direction, the second reinforcing rail is placed on the inner surface between the pair of facing walls of the first reinforcing rail. The tips of one facing wall may be abutted against each other and clamped as described above, which facilitates the alignment of the two reinforcing rails.

Perspective view of the container according to the embodiment of the present invention. Disassembled perspective view of the container Perspective view of the closing member Partial enlarged perspective view of the container Perspective view of the closing member A plan sectional view of the joint portion between the first side wall and the connecting protrusion. Side sectional view of the connecting portion between the second side wall and the container base Side sectional view of the fitting portion of the connecting protrusion, the reinforcing rail, and the first side wall. Side sectional view of the reinforcing rail Perspective view of a pair of reinforcing rails clamped Perspective view of a pair of reinforcing rails stacked side by side

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 11. As shown in FIG. 1, the container 10 of the present embodiment is formed by closing both ends of a groove-shaped container base 11 with a pair of closing members 30 and 30. The container base 11 is formed by bending a resin sheet 12 made of corrugated cardboard plastic (resin foam sheet, resin cardboard, resin honeycomb board, etc.), and as shown in FIG. 2, a rectangular bottom wall 13 and a rectangular bottom wall 13. It has a pair of first side walls 14 and 14 that stand up from the long side of the bottom wall 13 and a pair of connecting pieces 15 and 15 that stand up from the short side of the bottom wall 13 and are lower than the first side wall 14. Further, both ends of the bottom wall 13 in the longitudinal direction project outward from the side edge portions of the first side wall 14, and the connecting pieces 15 and 15 stand up from the tips of the projecting portions. Further, a plurality of slits 14S and 15S are formed on both side edges of each first side wall 14 and the upper edge of each connecting piece 15.

Further, one handle hole 16 is formed in each of the pair of first side walls 14 and 14. The handle holes 16 and 16 are arranged at positions offset from each other in the longitudinal direction of the container 10. Reinforcing parts 16A and 16A are attached to the opening edges of the handle holes 16 and 16.

As shown in FIG. 3, the closing member 30 is a resin injection-molded product, and is a flat surface on which connecting protrusions 40, 40 project from both side edges of the second side wall 33 that closes the end opening of the container base 11. It has a "U" shape. Further, the lower edge portion of the second side wall 33 has a double wall structure. Specifically, the second side wall 33 is composed of a main plate wall 31 that constitutes the entire body excluding the lower edge portion thereof, and a sub-plate wall 32 that forms a horizontally long strip and forms the lower edge portion of the second side wall 33. , The sub-plate wall 32 is arranged at a position slightly displaced forward from the main plate wall 31.

Further, on both side portions of the second side wall 33, a pair of first vertical ribs 38A and 38A extending in the entire vertical direction of the second side wall 33 are provided, and the vertical ribs 38A and 38A are provided with a main plate wall 31 and a sub. Both sides of the board wall 32 are connected. Further, the groove 33M, which is a gap between the main plate wall 31 and the sub plate wall 32, is provided with a plurality of in-groove ribs 33L (see FIG. 7) connecting between the main plate wall 31 and the sub plate wall 32. .. Then, as shown in FIG. 7, the connecting piece 15 of the container substrate 11 is inserted into the groove 33M, and the plurality of in-groove ribs 33L are received by the plurality of slits 15S (see FIG. 2) of the connecting piece 15.

As shown in FIG. 6, a pair of side walls 49 (in FIG. 6, only one side wall 49 is shown) on the opposite side of the above-mentioned vertical rib 38A from both sides of the inner surface of the second side wall 33. ) Is overhanging. Further, vertical ribs 38B and 38C extending in the entire vertical direction of the second side wall 33 project from the outer surface of the side wall 49. The connecting protrusion 40 is projected from the vertical rib 38C on the side away from the second side wall 33. That is, in the container 10 of the present embodiment, the connecting protrusion 40 according to the present invention has a structure protruding from both side edges of the second side wall 33 via the side wall 49 and the vertical rib 38C.

As shown in FIG. 5, the connecting protrusion 40 has a double wall structure as a whole. That is, the connecting protrusion 40 extends in the vertical direction in a substantially band shape, and forms a substantially band shape narrower than the outer protrusion wall 41 constituting the outer surface side of the connecting protrusion 40 and in the vertical direction. It is composed of an inner protrusion 42 that extends and constitutes the inner surface side of the connecting protrusion 40, and an upper surface wall 43 that connects the outer protrusion 41 and the upper ends of the inner protrusion 42. Further, the groove portion 40M which is a gap between the outer protrusion wall 41 and the inner protrusion wall 42 is provided with a plurality of in-groove ribs 40L connecting between the outer protrusion wall 41 and the inner protrusion wall 42. .. Then, as shown in FIG. 8, the first side wall 14 of the container substrate 11 is inserted into the groove portion 40M, and the plurality of in-groove ribs 40L are received by the plurality of slits 14S of the first side wall 14.

As shown in FIG. 5, the upper portion of the connecting protrusion 40 is provided with a rail receiving portion 40A formed by bulging the upper portions of the outer protrusion 41 and the inner protrusion 42 toward the square groove side so as to be separated from each other. .. Further, the lower surface portion of the rail receiving portion 40A is inclined so as to descend toward the tip end side of the connecting protrusion 40. Further, the rail receiving portion 40A is formed with a through hole 40B that penetrates the outer protrusion 41 and the inner protrusion 42 in a straight line.

The closing member 30 and the container base 11 are fixed by vibration welding. Further, as shown in FIG. 3, a plurality of welding recesses 51 are formed in a vertical row on the outer surface of the outer protrusion wall 41 as a "marking portion" to which a welding horn (not shown) is addressed. There is. Then, the inner portion of the welding recess 51 becomes a welding portion 51Y that is vibration welded to the first side wall 14. Further, on the outer surface of the sub-plate wall 32, a plurality of welding recesses 52 having the same shape as the above-mentioned welding recess 51 are formed side by side in a horizontal row, and the inner portion of the welding recess 52 is vibration-welded to the connecting piece 15. It becomes the welded portion 52Y.

In the main plate wall 31 described above, the upper edge portion thereof is bent into a square groove shape to form a square groove portion 36, and a handle hole 37 is formed below the square groove portion 36. Further, at the corner where each connecting protrusion 40 and the second side wall 33 intersect, an L-shaped upper surface protrusion 34 protrudes from the outer edge side of the upper surface thereof, while a lower surface protrusion 35 protrudes from the inner edge side of the lower surface. ing. Then, when the containers 10 are stacked, the lower surface protrusion 35 of the upper container 10 engages with the inside of the upper surface protrusion 34 of the lower container 10.

As shown in FIG. 1, reinforcing rails 20 and 20 are attached to the upper edges of the first side walls 14 and 14. The reinforcing rail 20 is made of metal (specifically, aluminum), for example, and as shown in FIG. 9, has a groove shape having a U-shaped cross section with an open lower surface, and has a groove bottom wall 22 and a groove bottom. It has a pair of facing walls 21 and 21 orthogonal to the wall 22. Further, the total length of the reinforcing rail 20 is the same as the total length of the first side wall 14.

On the inner side surfaces 21N and 21N of the pair of facing walls 21 and 21, a lower edge protrusion 25 is formed on each lower edge portion, and an upper edge protrusion 24 and 24 are formed on each upper edge portion. ing. The upper edge protrusion 24 has an end surface 24A that projects slightly stepped with respect to the entire inner surface surface 21N and is parallel to the inner surface surface 21N. Further, the stepped surface 24D between the inner surface surface 21N and the upper edge protrusion 24 is inclined with respect to the inner surface surface 21N. On the other hand, the lower edge protrusion 25 has a triangular wave shape in cross section. In other words, the lower edge protrusion 25 is formed by arranging a plurality of triangular protrusions 25T extending in the longitudinal direction of the reinforcing rail 20 side by side. The surface including the ridgeline at the tip of the triangular ridge 25T forms the end surface 25A of the lower edge protrusion 25, and the end surface 25A is flush with the end surface 24A of the upper edge protrusion 24.

As shown in FIG. 2, through holes 23 penetrating the facing walls 21 and 21 are formed at both ends and the center of the reinforcing rail 20 in the longitudinal direction. As shown in FIG. 9, the through holes 23 are arranged at the center of the facing wall 21 in the vertical direction. Specifically, the through hole 23 has a circular cross section, and the central axis of the through hole 23 is arranged at the center between the inner surface 22K of the groove bottom wall 22 and the tip surface 21K of the facing wall 21.

This concludes the description of the configuration of the container 10 of the present embodiment. Next, the action and effect of this container 10 will be described. The container 10 of the present embodiment is manufactured by assembling the container base 11, the connecting protrusion 40, and the reinforcing rail 20 as follows.

That is, the reinforcing rails 20 are fitted to the upper ends of the pair of first side walls 14 and 14 of the container base 11 shown in FIG. 2, respectively. At that time, the upper end of the first side wall 14 is abutted against the inner surface 22K of the groove bottom wall 22 of each reinforcing rail 20 (see FIG. 8), and both end faces in the longitudinal direction of the reinforcing rail 20 and the lateral direction of the first side wall 14. Both end faces are arranged substantially flush with each other. Then, the tips of the pair of connecting pieces 15 and 15 of the container substrate 11 are inserted into the groove portions 33M of the pair of closing members 30 and 30, and the pair of first side walls 14 and 14 are in an upright posture. Each closing member 30 is raised with the connecting piece 15. In the process, the side edge portion of the first side wall 14 and the end portion of the reinforcing rail 20 are inserted into the groove portion 40M of the closing member 30 including the rail receiving portion 40A.

Next, for example, a metal rivet 80 (corresponding to the "latch member" of the present invention) is inserted into the through hole 40B from the outside of the connecting protrusion 40. As shown in FIG. 8, the rivet 80 passes through the through hole 23 of the reinforcing rail 20 in the rail receiving portion 40A, penetrates the first side wall 14, and projects to the inner side surface side of the rail receiving portion 40A. Then, the tip portion of the rivet 80 is crimped to form the caulking protrusion 82B, and the rivet 80 is fixed to the connecting protrusion 40 by the caulking protrusion 82B and the head portion 82A on the opposite side. Further, the rivet 80 is also inserted into the through hole 23 in the center in the longitudinal direction of the reinforcing rail 20 to penetrate the first side wall 14 and the reinforcing rail 20, and the tip portion thereof is caulked. Then, a welding horn (not shown) is addressed to the welding recesses 51 and 52, and a plurality of locations of the connecting protrusion 40 are vibrated and welded to the first side wall 14 and the connecting piece 15 to form a plurality of welding portions 51Y and 52Y. , The assembly of the container 10 is completed.

The outer surface of the rail receiving portion 40A located outside the container 10 is surrounded by ribs so that the head portion 82A of the rivet 80 does not protrude outward from the ribs. Further, on the inner surface of the rail receiving portion 40A located inside the container 10, the upper portion and the lower portion protrude from the portion where the through hole 40B is formed, and the rivet 80 is inside the container 10 from the protruding portion. The caulking protrusion 82B does not protrude.

By the way, the container base 11 is manufactured by punching or cutting corrugated cardboard plastic and bending it. Further, the closing member 30 is manufactured by an injection molding die. At that time, the through hole 40B (see FIG. 8) is also molded by the injection molding die. Then, the reinforcing rail 20 is manufactured by drilling through holes 23 at both ends and the center thereof with a drill 91 (see FIG. 10) such as a drilling machine after being cut to a predetermined length.

Here, in the container 10 of the present embodiment, the through hole 23 is arranged in the center of the pair of facing walls 21 and 21 of the reinforcing rail 20 in the vertical direction. As a result, the through holes 23 can be drilled in both of the pair of reinforcing rails 20 and 20 at the same time. Specifically, as shown in FIG. 10, between the pair of facing walls 21 and 21 of the first reinforcing rail 20, which is one of the pair of reinforcing rails 20 and 20, the other. The facing wall 21 of the second reinforcing rail 20 which is the reinforcing rail 20 of the above is received and abutted against the inner surface 22K of the groove bottom wall 22 of the second reinforcing rail 20. Then, the first and second reinforcements are reinforced so that the entire facing walls 21 and 21 of the first and second reinforcing rails 20 and 20 overlap each other and the entire facing walls 21 and 21 of the other facing walls 21 and 21 overlap each other. The rails 20 and 20 can be collectively clamped by the clamper 90. At this time, as shown in FIG. 11, it is possible to clamp the outer surfaces of the first and second reinforcing rails 20 and 20 so as to overlap each other, but in such a case, the facing wall 21 is bent and stabilized. Cannot clamp. On the other hand, as described above, by clamping the first and second reinforcing rails 20, 20 as shown in FIG. 10, stable clamping becomes possible. Then, by drilling a through hole 23 in the center of the facing wall 21 in the vertical direction, the through hole 23 is formed at once in both the facing walls 21 and 21 of both the first and second reinforcing rails 20 and 20. be able to. As a result, the drilling work for the reinforcing rail 20 is reduced, and the manufacturing cost can be suppressed.

Further, in the container 10 of the present embodiment, the pair of inner side surfaces 21N and 21N of the reinforcing rail 20 are not flat, and are provided with an upper edge protrusion 24 and a lower edge protrusion 25, and the lower edge protrusion 25 is provided. Since the cross section has a triangular wave shape, the locking force of the reinforcing rail 20 with respect to the first side wall 14 is increased, and the displacement of the reinforcing rail 20 with respect to the first side wall 14 is suppressed. Nevertheless, since the end faces 24A and 25A of the upper edge protrusion 24 and the lower edge protrusion 25 are flush with each other, even if the pair of inner side surfaces 21N and 21N of the reinforcing rail 20 are not flat, as described above. When the facing walls 21 and 21 of the first and second reinforcing rails 20 are overlapped with each other, the overlapping facing walls 21 and 21 can be made parallel to each other.

The pair of reinforcing rails 20 and 20 may have different shapes, but if the pair of reinforcing rails 20 and 20 have the same shape as in the container 10 of the present embodiment, both of the reinforcing rails 20 and 20 may have the same shape. 20 and 20 can be assembled without distinction, and the efficiency of the assembly work is improved.

[Other embodiments]
The present invention is not limited to the above embodiments, and for example, embodiments as described below are also included in the technical scope of the present invention, and various other than the following, as long as they do not deviate from the gist. It can be changed and implemented.

(1) In the above embodiment, the through hole 23 is arranged at the center of the facing wall 21 of the reinforcing rail 20 in the vertical direction, but it may be arranged below the center of the facing wall 21 in the vertical direction. .. Even with such a configuration, substantially the same effect as that of the first embodiment is obtained. Specifically, as shown in FIG. 10, when the first and second reinforcing rails 20 and 20 are put together facing each other, the inner surface of at least one of the groove bottom walls 22 of the first and second reinforcing rails 20 is formed. A spacer (not shown) may be stacked on the 22K, and the spacer may be clamped so that the tip surface 21K of the facing wall 21 abuts against the spacer. Then, as in the first embodiment, if a through hole is formed in the overlapping portion of the facing walls of both the first and second reinforcing rails, the pair of reinforcing rails penetrates below the center of each facing wall. Holes can be formed at once.

(2) The reinforcing rail 20 of the above embodiment is made of metal, but is not limited to metal, and may be made of resin or wood.

(3) Further, the bar member according to the present invention to be passed through the through hole of the reinforcing rail is not limited to the metal rivet 80, and may be, for example, a screw, a resin rivet to be heat-caulked, or the like. good.

10 Container 11 Container base 14 First side wall 20 Reinforcing rail 21 Opposing wall 21N Inner side surface 23 Through hole 24 Upper edge protrusion 24A, 25A End face 25 Lower edge protrusion 33 Second side wall 40 Connecting protrusion 80 Rivet (bar member)

Claims (1)

A container substrate formed by bending a resin sheet into a groove shape and having a pair of first side walls facing each other.
A pair of second side walls that close the ends of the container substrate,
A pair of reinforcing rails of the same shape that form a groove with an open bottom surface and are fitted to the upper edge of the first side wall.
A connecting ridge having a groove protruding from both side edges of each of the second side walls and into which the side edges of the first side wall and the end of the reinforcing rail are fitted.
A through hole penetrating a portion where the reinforcing rail, the connecting protrusion, and the first side wall overlap each other.
A method for manufacturing a container including a bar member fixed in a state of being passed through the through hole.
When drilling the through hole in the reinforcing rail, one of the second reinforcing rails, which is the other reinforcing rail, is between the pair of facing walls of the first reinforcing rail, which is one of the reinforcing rails. Receiving the facing wall, the first and second reinforcing rails are clamped together so that one facing wall of the first and second reinforcing rails and the other facing wall overlap each other. A method for manufacturing a container in which the through holes are collectively drilled in the center or below the center in the vertical direction of the facing walls.

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