JP5541589B2 - Case assembling method and apparatus - Google Patents

Description

  The present invention relates to a method and an apparatus for assembling a case having an octagonal cross section having chamfered portions at four corners.

  A packaging case for a flexible product such as a standing pouch (self-supporting plastic bag) filled with liquid such as liquid detergent, shampoo, body soap, etc. has chamfered portions at the four corners of a quadrangular barrel. Many cases having an octagonal cross section and high compressive strength have been adopted. This case is brought into an assembled state by bending from a flat blank and joining with an adhesive.

  Here, the blank is composed of four cylinder panels forming a quadrangular cylinder and five chamfer panels forming chamfers at four corners of the cylinder in one direction through vertical folding lines. The panel has a continuous panel, and flaps are connected to both ends of the body panel via lateral folding lines.

  As a case assembling method for assembling a case from the blank as described above, the one described in Patent Document 1 has been conventionally known. In the case assembling method, in a state where a blank is arranged between a mandrel having an octagonal cross section having inclined surfaces formed at four corners of the outer periphery and a concave plate provided therebelow, By moving in the direction, one blank panel at the center of the blank and the chamfered panels on both sides of the blank are pressed against the lower inclined surfaces on both sides of the mandrel, and then the blank is mandreled by bending the chamfered panel on the remaining trunk panel After forming an octagonal cylinder by joining the chamfered panels that overlap each other, the bottom of the cylinder is formed by bending and bonding one end of the cylinder.

Japanese Patent No. 3304991

  By the way, in the case assembling method described in the above-mentioned patent document 1, a pair of chamfered panels are bent by pressing a central barrel panel and a pair of chamfered panels on both sides thereof against a mandrel with a concave plate. Can be folded accurately and reliably, but other torso panels and other chamfered panels are bent by swinging, so they cannot be folded accurately from the fold line, and a highly accurate case can be obtained. There is a problem that can not be.

  An object of the present invention is to provide a case assembling method and a case assembling apparatus capable of obtaining a highly accurate case.

In order to solve the above-mentioned problems, in the case assembling method according to the present invention, four body panels forming a quadrangular cylinder body and five narrow panels forming chamfers at four corners of the body. A chamfered panel of the same size has a panel continuous body arranged alternately in one direction via a vertical bend line, and a flap is connected to each end of each of the four body panels via a horizontal bend line. In a case assembling method of assembling a case from a provided blank , one body panel of two body panels located in the center of the panel continuum is composed of a female mold and a male mold disposed opposite to the female mold. Positioning the blank so as to be disposed between the one body panel and the one body panel by pushing the one body panel of the blank into the female mold by relative movement of the female mold and the male mold. Connected to both sides of the panel A pair of chamfered panels and a cylinder panel connected to each of the pair of chamfered panels form a pentagonal cylinder, and the three flaps connected to one end of the cylinder are bent inward. Forming the case main body by joining, a step of filling the product into the case main body taken out from the female mold, and a molded plate having the same size as the body panel bent to the upper surface side of the product A folding guide plate provided with a pair of inclined plate portions having the same width as the chamfered panel on both sides of the molded plate portion and a panel continuous body standing from the upper opening of the pentagonal cylinder Each of the remaining three chamfered panels except the pair of chamfered panels is folded to a position where it overlaps the upper surface of the corresponding inclined plate so that both sides wrap the bent guide plate, and the three The body panel located between the two chamfered panels on one side of the panel is folded to a position where it overlaps the upper surface of the molded plate part, and a pair of chamfered panels on both sides of the panel continuum are overlapped. A step of forming an octagonal cylinder by joining, and a step of closing the both ends of the cylinder by bending and joining the remaining flaps inward after pulling out the bending guide plate. Adopted.

  In order to solve the above problems, in the case assembling apparatus according to the present invention, the case is assembled by the case assembling method having the above-described configuration.

  As described above, in the present invention, a female mold and a male mold are used for forming a pentagonal cylinder, and a bent guide plate is used for forming an octagonal cylinder from the pentagonal cylinder. Therefore, the panel continuum can be accurately folded along a plurality of vertical fold lines, and an extremely accurate octagonal case can be obtained.

(A) thru | or (h) is a flowchart which shows the state in which a case is formed from a blank in steps. Perspective view showing female mold of molding apparatus Top view of the blank positioned relative to the female mold A longitudinal front view of FIG. (A) is a longitudinal front view showing the molded state of the box body, (B) is a longitudinal side view. Perspective view of the case body filled with products Longitudinal side view with folding guide plate set on the case body Longitudinal side view showing molded state of octagonal body Blank top view

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The blank S shown in FIG. 1A is made of a sheet such as cardboard. The blank S is, as shown in detail in FIG. 9, forming a chamfered four corners of the four first cylinder panel P ₁ to fourth cylinder panel P ₄ and the cylinder to form a quadrangular cylindrical body has a panel continuum 1 provided continuously alternately in one direction width first five same magnitude of narrow chamfer panel CP ₁ to fifth chamfered panel CP ₅ via the longitudinal fold lines 2, Inner flaps F ₁ and F ₂ are connected to both ends of the second trunk panel P ₂ and the fourth trunk panel P ₄ via a lateral folding line 3, and the first trunk panel P ₁ and the third trunk panel P ₁ . Outer flaps F ₃ and F ₄ are connected to both ends of the trunk panel P ₃ via lateral folding lines 3.

  The blank S is molded by the molding apparatus 10 shown in FIGS. The molding apparatus 10 includes a female mold 11 and a vertically movable male mold 12 provided above the female mold 11.

  The female mold 11 has a rectangular bottom plate 13, and a pair of opposing side walls 14 and end walls 15 are erected from three outer peripheral sides of the bottom plate 13, and each of the intersections of the opposing pair of side walls 14 and the bottom plate 13 is inclined. A wall 16 is provided, and a flap bending guide 17 is provided at one end of the pair of side walls 14 on the end wall 15 side.

The bottom plate 13 is a third cylinder panel P ₃ the same size of the blank S, whereas, a pair of inclined walls 16, the third beveled panel CP ₃ and 4 provided continuously on both sides of the third cylinder panel P ₃ It is the same width and bevelled panel CP _4.

The height of the end wall 15 is lower than the pair of opposed side walls 14. The flap folding guide 17 is connected to one end of the second trunk panel P ₂ and the fourth trunk panel P ₄ in the positioning state of the blank S where the third trunk panel P ₃ of the blank S faces the bottom plate 13 in the vertical direction. The inner flaps F ₂ and F ₂ are provided at positions facing the upper and lower sides.

Flap folding guides 17 form a prismatic, is a mounting which its upper is at a higher than the upper surface of the opposed pair of side walls 14, when depression of the blank S, so that the folding the inner flap F ₂ upward.

Male 12 is a fittable size in the female 11, the flat lower surface 19 are substantially the same size and the third cylinder panel P _3. On both sides of the lower surface 19, the inclined surface 20 facing obliquely upward is formed, the inclined surface 20 is a third beveled panel CP ₃ and the same size as the fourth chamfered panel CP ₄ blank S .

In forming the blank S, after positioning the blank S on the female mold 11, the male mold 12 is lowered. At the time of positioning of the blank S, the third cylinder panel P ₃ facing the bottom plate 13 up and down, the flaps F ₂ among which it is provided continuously to one end of the second cylinder panel P ₂ and the fourth cylinder panel P ₄ is bent flap folding The guide 17 is supported on the upper surface.

In the positioned state as described above blank S, is lowered male 12, the blank S is pressed down, as shown in FIG. 4, provided continuously to one end of the second cylinder panel P ₂ and the fourth cylinder panel P ₄ The inner flap F ₂ thus bent is bent upward by contact with the flap bending guide 17.

When blank S is further pushed down, by abutment against the opposing pair of side walls 14 the upper surface of the female die 11, the second cylinder panel P ₂ and the fourth cylinder panel P ₄ is upwardly bent, the third cylinder panel P ₃ outer flap F ₄ provided continuously to one end of is upwardly bent.

When the male mold 12 is moved down to the lowest limit position, FIG. 5 (b), as shown in (b), the third cylinder panel P ₃ pushed into the female 11 is in close contact with the bottom plate 13 top surface, a third chamfer The panel CP ₃ and the fourth chamfer panel CP ₄ are in close contact with the inner surface of the inclined wall 16, and the second trunk panel P ₂ and the fourth trunk panel P ₄ connected to the outer sides of the pair of chamfer panels, respectively. A cylinder with a pentagonal cross section is formed, which is in close contact with the inner surface of the side wall 14 and is open at the top.

Further, the inner flap F ₂ connected to one end of the second trunk panel P ₂ and the fourth trunk panel P ₄ is bent to close one end opening of the pentagonal trunk, and the third trunk panel P ₃ outer flap F ₄ provided continuously to one end of which is a bent state overlapping the inner flap F ₂ thereof. The flap F ₂ and the outer flap F ₄ among mutually overlapping, joined by previously applied adhesive on the other hand, by the junction, as shown in FIG. 1 (c), the case body K ₁ to the top and the other end is open Is formed.

After forming of the blank S by the female 11 and male 12, the case body K ₁ which is formed is removed from the female die 11, as shown in FIG. 1 (d), the inside from the other end opening of the case body K ₁ Product A is filled.

After the product A is filled, the bending guide plate 21 shown in FIGS. 1E and 6 is set on the product A. Here, the bent guide plate 21, a pair of the first cylinder panel P ₁ and the same size as the planarity of the first chamfer panel CP ₁ and the second beveled panel CP ₂ the same width on both sides of the forming plate portion 22 The inclined plate portion 23 is provided.

As shown in FIG. 7, after the set of bent guide plate 21, the second beveled panel CP ₂ and fifth chamfer panel CP ₅ is folded to a position overlapping the upper surface of the inclined plate portion 23, the first cylinder panel P ₁ is folded to a position overlapping the upper surface of the forming plate 22, further, the first chamfer panel CP ₁ is folded to a position overlapping the fifth chamfered panel CP _5.

FIG. 8 shows a bent state of the first chamfered panel CP ₁ , the second chamfered panel CP ₂ , the fifth chamfered panel CP ₅ , and the first trunk panel P ₁ , and the first chamfered panel CP ₁ and the first chamfered panel CP ₁ overlapped with each other. The five-chamfered panel CP ₅ is bonded to one of the beveled panels with an adhesive applied in advance. An octagonal body B that encloses the product A is formed by the joining.

After molding of the octagonal cylinder B, as shown in FIG. 1 (f), to a position where the outer flaps F ₄ provided continuously to the first end of the cylinder the panel P ₁ overlaps the flap F ₂ inner folded previously It is bent and joined to the inner flap F ₂ with an adhesive applied in advance. By the junction, the bottom case with K ₂ are formed. After formation of the bottomed casing K _2, bent guide plate 21 is pulled out to the outside.

Bottoming Case K _2, as shown in FIG. 1 (g), is a standing state in which the bottom and below, the flaps F ₁ and the outer flap F ₃ among provided on the upper portion open end of the octagonal cylinder B The upper opening of the octagonal body B is sealed by inward bending and bonding. By its sealing, as shown in FIG. 1 (h), the octagonal casing K ₃ is formed.

As shown in the embodiment, when the octagonal cylinder B is formed, in the first stage, a pentagonal cylinder having an open top is formed by molding using the female mold 11 and the male mold 12, and the cylinder is formed. after formation, the second stage performs the bending of the second beveled panel CP ₂ and fifth chamfer panel CP ₅ so as to wrap the a fold guide plate is set on a commodity a that is filled into the barrel, Further, by bending the first trunk panel P ₁ and the first chamfered panel CP ₁ , the panel continuous body 1 can be accurately folded along the plurality of vertical fold lines 2, and extremely high accuracy 8 A square case can be obtained.

DESCRIPTION OF SYMBOLS 1 Panel continuous body P ₁ 1st cylinder panel P ₂ 2nd cylinder panel P ₃ 3rd cylinder panel P ₄ 4th cylinder panel CP ₁ 1st chamfer panel CP ₂ 2nd chamfer panel CP ₃ 3rd chamfer panel CP ₄ 4th Chamfer panel CP ₅ 5th chamfer panel F ₁ inner flap F ₂ inner flap F ₃ outer flap F ₄ outer flap K ₁ case body K ₂ case K ₃ case 11 female mold 12 male mold 13 bottom plate 14 side wall 15 end wall 16 inclined wall 17 Flap bending guide 18 Inclined surface 19 Lower surface 20 Inclined surface 21 Bending guide plate 22 Forming plate portion 23 Inclined plate portion

Claims (2)

Four cylinder panels forming a quadrangular cylinder and five narrow chamfer panels of the same size forming chamfers at the four corners of the cylinder are alternately arranged in one direction via vertical folding lines. In the assembling method of the case, which has a panel continuous body provided continuously, and assembles the case from a blank in which a flap is continuously connected to each end of each of the four body panels via a lateral folding line,
Positioning the blank so that one body panel of the two body panels located at the center of the panel continuum is disposed between the female mold and the male mold disposed opposite to the female mold;
A pair of chamfered panels connected to the one body panel and both sides of the one body panel by pushing the one body panel of the blank into the female mold by relative movement of the female mold and the male mold. And a cylinder panel connected to each of the pair of chamfered panels to form a cylinder having a pentagonal cross section, and inward bending and joining of three flaps connected to one end of the cylinder are performed. A step of molding the case body,
Filling the inside of the case body taken out of the female mold with products,
A bending guide plate provided with a molded plate portion having the same size as the body panel to be bent on the upper surface side of the product and a pair of inclined plate portions having the same width as the chamfered panel on both sides of the molded plate portion is set on the product. And a process of
Each of the remaining three chamfered panels excluding the pair of chamfered panels is arranged so that both sides of the panel continuous body standing up from the upper opening of the pentagonal cylinder wrap the bent guide plate . Bend to a position that overlaps the upper surface, and the body panel located between the two chamfered panels on one side of the three sheets is folded to a position that overlaps the upper surface of the molded plate part, and a pair of panels on both sides of the panel continuum Superimposing chamfered panels and forming an octagonal cylinder by joining the pair of chamfered panels;
After pulling out the bending guide plate, folding the remaining flaps inward and joining to close both ends of the barrel,
Assembling method of case consisting of.   A case assembling apparatus for assembling a case by the case assembling method according to claim 1.

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