JP4770636B2 - Container manufacturing method and container - Google Patents

Description

  The present invention relates to a container manufacturing method and a container in which embossing lines are formed in a circumferential direction of a body part.

Conventionally, as a container into which hot water is poured, there is a container provided with a stamping line indicating an appropriate amount of hot water called a perforation line or a Peter line in the circumferential direction of the trunk. This container has a cylinder part formed in a cylindrical shape by stacking and sticking both ends of a fan-shaped cylinder part forming blank to each other, and a bottom part provided on one side of the cylinder part. The embossing line is formed in the body part by relatively rotating the embossing member and the body part in a state where the body part of the container is sandwiched from the inside and outside by a pair of embossing members that are complementary to each other. (See Patent Document 1).
JP-A-11-314286

  However, the number of blanks sandwiched between the pair of embossing members is two at the pasting portion where both end portions of the blank are overlapped with each other. For this reason, when an embossing member rides on this sticking part, a big addition is added to an embossing member and a blank, and there exists a problem that the edge part of a blank cuts or changes.

  Then, this invention aims at reducing the possibility of the cutting | disconnection and deformation | transformation of a blank in the location where the stamping line of a sticking part is formed.

  The manufacturing method of the container (1) of the present invention comprises a step of forming a cylindrical body part (2) by overlapping and sticking both end parts (4a, 4b) of the body part forming blank (4) to each other. The pair of embossing members and the body are relatively rotated while the body is sandwiched from the inside and the outside by a pair of embossing members (14, 18) that are complementary to each other. Forming a stamped line (7) in the circumferential direction of the barrel part, and a method of manufacturing a container, wherein the stamped line at the end of the barrel forming blank is cut at a position ( By providing 8), the above-mentioned problem is achieved by making the overlapping width at the position where the embossing line of the sticking part of the both ends is narrower than the overlapping width at the other position of the sticking part. To solve.

  According to the container manufacturing method of the present invention, the overlapping width at the position where the embossing lines of the sticking portions at both ends are formed is narrower than the overlapping width at other positions of the sticking portion. Therefore, in the process in which the embossing member relatively moves along the circumferential direction of the body of the container, the distance between which the embossing member and the blank are subjected to a large addition is short because the blanks are doubled. Become. Therefore, the possibility of blank deformation and cutting is reduced.

  In one form of this embodiment, the direction of rotation of the pair of embossing members relative to the body portion is set so that the pair of embossing members ride on the sticking portion from the opening side of the notch. May be.

  According to this embodiment, the pair of embossing members ride on the sticking portion from the opening side of the cut. Then, at the time of riding, the stamping member collides obliquely without colliding with the cross section of the blank from the front because the end of the blank is cut. Therefore, the impact of the impact of the stamping member on the blank is alleviated, and the possibility of deformation and cutting of the blank is reduced. Further, the blank sandwiched between the embossing members does not rapidly increase to two in the entire area of the embossing member when the embossing member reaches the sticking portion. The number of nipped sheets at the cut portion remains one, and the area for nipping two sheets gradually increases according to the angle of the cut with rotation. Therefore, an additional rapid change applied to the embossing member does not occur.

  One form of this invention WHEREIN: The said trunk | drum may be formed so that the said edge part (4a) provided with the said notch | incision (8) may become an inner side of the said trunk | drum (2). According to this form, since there is a notch at the position where the inner stamping line of the manufactured container is formed, it becomes easier to recognize the position of the stamping line than in the case of only the stamping line, The discrimination effect is increased. Also, for example, when hot water is put inside the container, it becomes difficult to see the hot stamping line when the hot water reaches the stamping line. It becomes easy to specify the position. The notch may be V-shaped.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, according to the container manufacturing method and container of the present invention, the possibility of blank cutting and deformation is reduced. Therefore, defective manufacturing of the container can be reduced and manufacturing cost can be reduced.

  A container according to one embodiment of the present invention will be described. FIG. 1 is a cross-sectional view of a container 1. The container 1 is not limited to this, but is a container used for cooking instant food or the like by putting hot water inside.

  As illustrated, the container 1 is a truncated cone container having a body 2 and a bottom 3. The body part 2 is formed by rounding a blank 4 for forming a fan-shaped body part into a cylindrical shape, and bonding both ends 4a and 4b with one end 4a of the blank 4 on the inside and the other end 4b on the outside. Yes, the sticking portions 5 of the both end portions 4 a and 4 b extend in the depth direction of the body portion 2. The upper opening 2 a of the body portion 2 is curled outwardly for reinforcement of the container 1 and provided with a flange portion 6. The bottom 3 is provided slightly above the lower opening end 2 b of the body 2. The body 2 and the bottom 3, that is, the material of the container 1 is a roll-shaped raw material obtained by coating polyethylene on a cup base paper by a laminating method, has heat resistance and waterproofness, and hot water is injected into the container 1. Is possible.

  At a position about 1/3 below the upper opening 2a of the body portion 2 in the depth direction, a stepped portion 7 is provided in the circumferential direction which is an embossing line or a stamping line called a Peter line to indicate an appropriate amount of hot water. It has been. The position of the stepped portion 7 can be changed as appropriate according to the contents. At the intersection between the end 4a of the blank 4 located on the inner side of the body 2 and the stepped portion 7, the length of the two oblique sides with respect to the end 4a extends from the end 4a to the sticking portion 5 side. A V-shaped cut 8 is provided. Since the notch 8 is provided in this way, the overlapping width at the position where the stepped portion 7 of the attaching part 5 of the both ends 4a and 4b is formed is larger than the overlapping width at the other position of the attaching part 5. Is also narrower. The notch 8 is not limited to a V shape having two oblique sides having substantially the same length, and may be an oblique V shape having two oblique sides having different lengths, a U shape, or the like. The size and shape of the notch 8 are appropriately determined within a range that does not affect the seal of the sticking portion 5.

  Next, the manufacturing method of the container 1 of this form is demonstrated. First, the blank 4 for fan-shaped trunk | drum formation is punched out from the roll-shaped original fabric which coated polyethylene by the extrusion lamination method to the above-mentioned cup base paper. FIG. 2 shows the blank 4 that has been punched out. At the time of this punching, a V-shaped cut 8 is also provided at the same position of the end 4a of the blank 4 where the step 7 is formed.

  The blank 4 is rounded into a cylindrical shape, and the body 2 having the pasting portion 5 is bonded to the both ends 4a and 4b so that the one end 4a of the blank 4 is on the inner side and the other end 4b is on the outer side. It is formed. From the lower opening end 2b of the trunk | drum 2, the bottom part 3 of the shape which bent the outer periphery of the circular blank is engage | inserted by making a bending part downward. And the lower end of the trunk | drum 2 is folded up from the inner side of the trunk | drum 2, and it adhere | attaches on both sides of the bending part of a circular blank. By this step, the bottom 3 is provided slightly above the lower opening end 2b of the body 2. The upper opening 2a of the body 2 is curled outwardly to provide the flange 6. FIG. 3 is a perspective view of the container 1 formed as described above, and the stepped portion 7 is not yet provided.

  Next, the container 1 is embossed to provide the stepped portion 7. FIG. 4 is a schematic view of the embossing apparatus 10. The embossing apparatus 10 includes a support shaft 11, a container holding portion 13 that is rotatably supported by the support shaft 11 via a bearing 12, and a first embossing member that is fixed to the outer periphery of the container holding portion 13. 14. The embossing device 10 further includes a moving shaft 16 that can move horizontally in the direction of arrow X in the figure, and a second embossing member 18 that is rotatably attached to the moving shaft 16 via a bearing 17. .

  The first embossing member 14 has a thick annular shape, the inner periphery 14 a of the annular ring substantially coincides with the outer periphery of the container holding part 13, and the first embossing member 14 is the container holding part 13. And is fixed at a predetermined position. The predetermined position is a position where the stepped portion 7 is formed when the container 1 is put on the container holder 13 with the bottom 3 facing up. The outer periphery 14b of the first embossing member 14 has a tapered shape in which the diameter gradually decreases upward along the inner periphery of the container 1, and the diameter gradually decreases in the middle, and the step portion 14c. And a taper shape with a diameter gradually decreasing above the stepped portion 14c.

  The second embossing member 18 is fixed to the moving shaft 16 so as to be paired with the first embossing member 14 and to have the same height as the second processing member 18. The outer periphery 18 b of the second embossing member 18 is complementary to the outer periphery 14 b of the first embossing member 14. In other words, a stepped portion 18c having a tapered shape whose diameter gradually increases along the outer periphery of the container 1 and gradually increases in diameter is provided in the middle, and the diameter gradually increases above the stepped portion 18c. Having a tapered shape.

  The container 1 shown in FIG. 3 is put on the container holding part 13 with the bottom part 3 facing upward as shown in FIG. At that time, the inner surface of the bottom portion 3 comes into contact with the upper portion of the container holding portion 13, and the outer periphery 14 b of the first embossing member 14 comes into contact with a position where a step portion on the inner periphery of the body portion 2 is formed. In this state, the container holder 13 is rotated by a drive mechanism (not shown), and the first embossing member 14 and the container 1 are rotated. Next, the moving shaft 16 moves in the X direction, the outer periphery 18b of the second embossing member 18 is pressed against the outer periphery of the container 1, and the body 2 rotates with the first embossing member 14 while rotating. It is sandwiched between the second embossing member 18. In addition, a rotation direction is a direction of the arrow Y from which the sticking part 5 of the trunk | drum 2 enters into the clamping position A from the notch 8 side. Since the second embossing member 18 can also rotate with respect to the moving shaft 16, the second embossing member 18 also rotates in accordance with the rotation of the first embossing member 14, and The sandwiched portion is pushed out in the direction of arrow Y. And the step part 7 is continuously formed in the clamped part of the trunk | drum 2. As shown in FIG.

  Here, at the intersection of the end 4a of the blank 4 located on the inner side of the body 2 and the stepped portion 7, there is a cut 8 extending from the end 4a to the sticking portion 5 in the direction opposite to the arrow direction Y. Is provided. The sticking part 5 enters from the notch 8 side with respect to the clamping position A sandwiched between the first embossing member 14 and the second embossing member 18. At this time, since the notch 8 is provided in the end 4 a of the blank 4, the first embossing member 14 does not collide with the cross section of the end 4 a of the blank 4 from the front but obliquely. Therefore, the impact of the collision of the first embossing member 14 on the cross section of the blank 4 is mitigated, and the possibility of deformation or cutting of the cross section of the blank 4 is reduced.

  Furthermore, since the notch 8 is provided at the position where the stepped portion 7 of the end 4a of the blank 4 is formed, the overlapping width at the position where the stepped portion 7 of the pasted portion 5 of both ends 4a and 4b is formed. It is narrower than the overlapping width at other positions of the sticking part 5. For this reason, in the process in which the first embossing member 14 and the second embossing member 18 relatively move along the circumferential direction of the body portion 2 of the container 1, the blanks 4 are overlapped. As a result, the distance to which large addition is applied to the embossing members 14 and 18 and the blank 4 is shortened. Therefore, the possibility of deformation and cutting of the blank 4 is reduced.

  Further, the blank 4 sandwiched between the first embossing member 14 and the second embossing member 18 reaches the sticking portion 5 and the first embossing member 14 and the second embossing member 14. Rather than suddenly becoming two sheets in the entire region of the clamping position A between the embossing member 18, the number of clamped parts at the cut portion remains one, and gradually increases according to the angle of the cut 8. The area where the sheet is sandwiched increases. FIG. 5 is a graph showing the pressure P between the stamping members 14 and 18 necessary for providing the stepped portion 7 at the portion where the number of sandwiched sheets changes from one to two. A graph a indicated by a solid line is a graph showing a change in the pressure P when the cut 8 of the present embodiment is provided, and a graph b indicated by a dotted line is the pressure P when the conventional cut is not provided. It is the graph which showed the change. As shown in the figure, when the cut is not provided, the pressure between the embossing members 14 and 18 necessary for providing the stepped portion 7 in the sticking portion 5 is reached when the end of the sticking portion is reached. Since the number of sandwiched sheets generally increases to two, the number increases sharply from P1 to P2. However, when the notch 8 is provided as in this embodiment, the pressure between the embossing members 14 and 18 necessary for providing the stepped portion 7 gradually changes from P1 to P2 without abrupt change. To do. Therefore, the first embossing member 14 and the second embossing member 18 ride on the adhering portion 5 without causing the stepped portion 7 due to insufficient pressure at the end of the adhering portion, and the like. There is no abrupt addition to the first and second embossing members 14 and 18.

  When the container 1 is rotated several times and the step portion 7 is provided on the entire outer periphery of the container 1, the moving shaft 16 and the second embossing member 18 move horizontally along the arrow X in a direction away from the container 1, The rotation of the container 1 is completed. And container 1 is removed from container holding part 13, and container 1 in which level difference part 7 was provided is completed.

  Although not shown, the outer periphery of the container 1 can be further covered with an exterior material. By covering the outer packaging material, the container 1 can be provided with a heat insulating effect, and the heat when held by hand can be reduced. Instead of the exterior material, the outer periphery of the container 1 may be foamed, and in this case, a heat insulating effect can be obtained by the foam material, and the thickness when held by hand can be reduced.

  As described above, according to the present embodiment, as described above, when the first embossing member 14 and the second embossing member 18 ride on the pasting portion 5 of the blank 4, the cross section of the end 4 a of the blank 4 is used. The applied force is reduced, and the problem that the end portion 4a of the blank 4 is pushed and deformed or cut is less likely to occur. Accordingly, manufacturing defects of the container 1 are reduced, and manufacturing costs can be reduced. Further, since the notch 8 is provided in the stepped portion 7 inside the body portion 2, the position of the stepped portion 7 can be more easily recognized and the identification effect is enhanced as compared with the case where only the stepped portion 7 is provided. Further, when hot water reaches the stepped portion 7 when hot water is introduced into the container 1, the stepped portion 7 becomes difficult to see. It becomes easy to specify the position of.

An example of this form will be described. A base roll of 255 g / m ^{2 of} a cup base paper and polyethylene coated at 25 μm by extrusion lamination was punched into a fan-shaped 0 blank 4 by a known punching method. When punching, the right side of the blank 4 (the end on the side formed on the inner surface side after cup molding) is positioned approximately 36.5 mm from the upper end (stepped portion formation position), and one side is approximately 3.5 mm. A triangular V-shaped cut 8 was provided. Thereafter, paper cup molding was performed, and the stepped portion 7 was formed in the process of combining the exterior paper. There was no piece of paper in the pasted portion after processing the step 7.

A base roll of 255 g / m ² , polyethylene rolls coated at 25 μm by extrusion lamination, were punched into a fan-shaped blank 4 by a known punching method. At the time of punching, the opening width is 3 mm and the notch depth is about 36.5 mm from the upper end of the right end of the blank 4 (the end formed on the inner surface side after cup molding) (stepped portion forming position). A U-shaped cut 28 of 3.5 mm was provided. FIG. 6 is a cross-sectional view of the container 21 provided with a U-shaped cut 28. Thereafter, paper cup molding was performed, and the stepped portion 7 was formed in the process of combining the exterior paper. There was no piece of paper in the pasted portion after processing the step 7.

A base roll of 255 g / m ² , polyethylene rolls coated at 25 μm by extrusion lamination, were punched into a fan-shaped blank 4 by a known punching method. At the time of punching, the opening width is 3 mm and the depth of cut is 3 mm at a position (step portion forming position) about 36.5 mm from the upper end of the right end of the blank 4 (the end formed on the inner surface side after cup molding). The upper side is horizontal and the lower side is slanted, and a V-shaped cut 38 is formed, which forms a slanted shape as a whole. FIG. 7 is a cross-sectional view of the container 31 provided with an oblique V-shaped cut 38. Thereafter, paper cup molding was performed, and a stepped portion was formed in the process of combining the exterior paper. There was no piece of paper in the pasted part after processing the step part.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this. For example, the stepped portion as the embossing portion does not have to be a stepped portion with a diameter expanding upward when the opening of the container is on the top, and may be a stepped portion with a diameter narrowing on the top. Further, the embossing portion may be a ridge portion, and in that case, it may be either a ridge portion protruding outward or a ridge portion protruding inward. In addition, the cut can be provided on one side or both sides of the container when the container is molded, but it is formed on one side because it may affect the sticking failure of the sticking part. It is preferable.

Sectional drawing of the container concerning one form of this invention. The figure which showed the blank for container formation. The perspective view of the container before level | step-difference part formation. Schematic of an embossing apparatus. The graph which showed the pressure between the stamping process members in an adhesion part. Sectional drawing of the container provided with the U-shaped notch. Sectional drawing of the container provided with the diagonal-shaped V-shaped notch.

Explanation of symbols

1 Container 2 Body 3 Bottom 4 Blank (Blank Forming Blank)
4a, 4b end
5 Adhering part 7 Step part (embossing line)
8, 28, 38 Notch 14 First stamping member (a pair of stamping members)
18 Second stamping member (a pair of stamping members)
A Nipping position

Claims (5)

A process for forming and forming a cylindrical body part by overlapping and sticking both ends of the body part forming blank to each other;
The pair of embossing members that are complementary to each other are rotated in the circumferential direction by relatively rotating the pair of embossing members and the body while the body is sandwiched from the inside and the outside. Forming a stamping line on the container, and a method of manufacturing a container comprising:
By providing a notch at the position where the stamping line of the end of the body part forming blank is formed, the overlapping width at the position where the stamping line of the sticking part of the both ends is formed, A method for producing a container, characterized in that the container is narrower than the overlapping width at another position of the sticking part.   The direction of rotation of the pair of embossing members with respect to the body portion is set so that the pair of embossing members ride on the sticking portion from the opening side of the notch. The manufacturing method of the container as described.   3. The method for manufacturing a container according to claim 1, wherein the body portion is formed such that the end portion provided with the cut is located inside the body portion.   The manufacturing method according to any one of claims 1 to 3, wherein the notch is V-shaped.   The container manufactured by the method of any one of Claims 1-4.

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