JP2013056700A - Funnel part, packaging container using funnel part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a funnel part which retains strength at a low cost.SOLUTION: The funnel part fitted into a cylindrically shaped container body having an open end, a bottom section, and a sidewall, and composes a packaging container for transferring the content to a conservation container, includes: a funnel section the diameter of which increases from a narrow opening side toward a wide opening side; a tubular discharge section being connected to the end edge in the narrow opening side; and the cylindrically shaped sidewall section connected to the funnel section by surrounding the opening section on the wide opening side in the funnel side and fitted into the container body, wherein the funnel section, the discharge section, and the sidewall are integrally formed using a sheet material including paper and a sealant layer, and the opening section in the discharge section is provided with a folded-back section in which the sheet material is deposited by being folded back all around.

Description

  The present invention relates to a funnel part used in a packaging container for packaging a substance having fluidity such as powder, granule, liquid, etc., and transferring its contents to another container, etc., and a packaging container using the funnel part It is about.

  Powdered or granular foods such as instant coffee are generally sold in a state of being filled in a highly airtight packaging container such as a capped bottle so that the airtightness during storage can be maintained. In contrast to such a packaging container, Patent Document 1 proposes a packaging container for refilling that can easily refill the contents. When the contents are transferred from the packaging container to the storage container or the like, the packaging container is opened and directed to the opening of the storage container, and the contents are gradually refilled.

  FIG. 14 is a longitudinal sectional view of a packaging container 900 disclosed in Patent Document 1. As shown in FIG. The packaging container 900 includes a cylindrical container body 920, a funnel part 930, a seal lid 960, and an overcap 980. The funnel part 930 includes a funnel portion 931 and a side wall portion 932 connected to the wide-mouth end of the funnel portion 931. The side wall portion 932 is fitted inside the container body 920 and joined to the inner surface of the container body 920. The funnel portion 931 has a shape whose diameter narrows toward the outside of the opening of the container body 920. Further, the narrow edge side edge of the funnel portion 931 and the open end edge of the container body 920 constitute the same plane. The container body 920 is filled with the contents 950 and the edge of the open end of the container body 920 is sealed with a seal lid 960. The seal lid 960 is formed with a plurality of perforations (not shown) extending radially from the center. Further, an overcap 980 that covers the top of the seal lid 960 is attached during storage or distribution, and prevents the seal lid 960 from being broken.

JP 2009-26295 A

  Conventional funnel parts have been molded using resin. However, from the viewpoint of environmental issues, it is desirable to reduce the amount of plastic and aluminum foil used to save resources, and dealumination of container bodies and funnel parts, etc., and change to paper-based materials. It is demanded.

  However, when a funnel part is formed by pressing a sheet member including paper, there is a problem that strength is insufficient. In addition, there is a limit to the shape that can be formed by pressing, and it has been difficult to shape the shape of the funnel part. Or when forming a funnel part by a pulp mold manufacturing method, although strength was obtained, there existed a problem that the cost of installation of equipment was high and mass productivity was inferior.

  Therefore, it is an object of the present invention to maintain a sufficient strength that prevents deformation such as buckling due to a load at the time of storage, distribution, refilling, etc., mainly using paper, and corresponding to environmental problems. It is to provide parts at low cost.

  The present invention is a funnel part that is fitted into a cylindrical container body having an open end, a bottom portion, and a side wall, and constitutes a packaging container for transferring contents to a storage container, from a narrow mouth side to a wide mouth side A cylindrical shape that is connected to the funnel portion that surrounds the opening on the wide-mouth side of the funnel, and is fitted into the container body. And a funnel, a discharge portion, and a side wall portion are integrally formed using a sheet material including paper and a sealant layer, and the sheet material is folded over the entire circumference at the opening portion of the discharge portion. This is a funnel part provided with a welded folded part.

  ADVANTAGE OF THE INVENTION According to this invention, the funnel part which hold | maintained the intensity | strength which uses paper as a main material can be provided at low cost.

The top view and front view of the funnel part which concern on the 1st Embodiment of this invention The longitudinal cross-sectional view of the funnel part which concerns on the 1st Embodiment of this invention The top view of the blank material which concerns on the 1st Embodiment of this invention Sectional drawing of the blank material and funnel part which concern on the 1st Embodiment of this invention The longitudinal cross-sectional view of the packaging container which concerns on the 1st Embodiment of this invention Sectional drawing which shows the use condition of the packaging container shown in FIG. Longitudinal sectional view of the funnel part according to the second embodiment of the present invention Diagram showing conventional issues The top view and front view of the funnel part which concern on the 3rd Embodiment of this invention Longitudinal sectional view of a funnel part according to a third embodiment of the present invention Sectional drawing explaining the curvature of the side wall part of a funnel part Longitudinal section of container body with funnel parts joined The perspective view of the funnel part which concerns on 4th Embodiment Vertical section of a conventional packaging container

(First embodiment)
The first embodiment of the present invention will be described below. FIG. 1 is a top view (a) and a front view (b) of a funnel part 101 according to the present embodiment. 2 is a longitudinal sectional view of the funnel part 101 taken along the line AA ′ of FIG.

  The funnel part 101 is integrally formed using a sheet material including paper and a sealant layer, and includes a funnel part 102, a discharge part 103, and a side wall part 104. Examples of the material of the sheet material include those having a layer configuration of PE (polyethylene) / paper / PE. The funnel portion 102 has a truncated cone shape whose diameter decreases from the wide-mouth side to the narrow-mouth side. The wide-mouth side constitutes one opening 105 of the funnel part 101, and the discharge portion 103 is connected to the narrow-mouth side. Has been. The discharge part 103 has a cylindrical shape and constitutes the other opening part 106 of the funnel part 101. The side wall 104 has a cylindrical shape with a substantially constant diameter, surrounds the outer surface of the funnel 102, and is connected to the periphery of the opening 105.

  A folded portion 206 is formed inside the discharge portion 103 by folding a part of the sheet material inward. The folded portion 206 is welded to the other part of the sheet material constituting the discharge portion 103. Due to the folded portion 206, the strength of the opening 106 is improved. The funnel portion 102 and the discharge portion 103 are provided with a plurality of ruled lines 107. The ruled lines 107 are provided radially along the intersection line between the plane including the central axis of the funnel part 101 and the funnel part 101. As will be described later, each ruled line 107 is welded in a state of being crushed and filled with a dent. Thereby, the strength of the entire funnel part 101 is improved.

  The discharge portion 103 may be formed in a tapered shape to be rotated with respect to the central axis of the funnel part 101 as shown in a partially enlarged view of FIG. The taper angle (θ in FIG. 2) of the discharge portion 103 is preferably set in the range of 0 to 15 °, and more preferably in the range of 5 to 10 °. The larger the taper angle, the easier it is to remove the funnel part from the mold when manufacturing the funnel part described below. However, if the taper angle exceeds 15 °, the strength of the discharge portion is reduced. When the taper angle is 0 °, the buckling strength of the funnel part 101 is maximized, but as described above, the release property of the funnel part is deteriorated. Moreover, it is preferable to set the dimension of the discharge part 103 in the center axis direction of a funnel part to 7-15 mm. When the height of the discharge unit 103 is less than 7 mm, it cannot be inserted into a tank of a dedicated coffee machine described later. On the other hand, if the height of the discharge portion 103 exceeds 15 mm, the discharge portion hits a member constituting the tank.

  FIG. 3 shows a plan view of a blank material 201 for producing the funnel part 101. The blank material 201 is formed by punching a sheet material in which paper and resin are laminated with a mold. By rounding the blank material 201 and overlapping and sealing the linear side edge portions, a truncated cone-shaped intermediate is once formed. Then, each part of the funnel part 101 is formed by drawing this intermediate body. The blank material 201 is formed with a plurality of ruled lines 107 as shown in FIG. As shown in FIG. 4B, the sealant layer is welded in a state in which the irregularities of the ruled line 107 portion are crushed by heating during drawing of the intermediate. Thus, the rigidity of the funnel portion 102 is improved by crushing the unevenness of the ruled line 107 portion. This also maintains a circular cross-sectional shape. Therefore, it can be used instead of a conventional resin funnel part.

  FIG. 5 is a longitudinal sectional view of a packaging container 110 provided with such a funnel part 101. The packaging container 110 includes a cylindrical container body 120, a funnel part 101, and a seal lid 160. In the funnel part 101, the side wall portion 104 is fitted inside the container main body 120 and is joined to the inner surface of the container main body 120. Moreover, the edge of the opening part 106 of the discharge part 103 and the edge of the open end of the container main body 120 constitute the same plane. Note that the edge of the opening 106 may slightly protrude outward from the container main body 120 from a plane including the edge of the open end of the container main body 120. The container body 120 is filled with the contents 150, and the open end of the container body 120 is sealed with a seal lid 160. When filling the contents 150, the nozzle of the filling machine is inserted into the extraction unit 103. When the content 150 is powder, the gap between the nozzle and the opening 106 is closed with a lid member provided on the nozzle to prevent the content from rising, and the entire edge of the discharge unit 103 is covered with the lid member. Lightly pressed. In the present embodiment, since the strength of the discharge portion 103 against pressing is ensured by setting the taper angle of the discharge portion 103 to 15 ° or less, deformation of the funnel part 101 is prevented even when pressed by the lid member. Is done.

  Due to the above-described improvement in strength, the funnel part 101 is prevented from being deformed when attached to the container body 120, during storage after filling the contents 150, and when used (when refilling the contents into the storage container). For example, at the time of storage, the position of the edge of the opening portion 106 of the discharge portion 103 is lowered, a gap is generated in the contact portion with the seal lid 160, and the contents 150 pass through the gap and outside the funnel part 101. It can be prevented from flowing in. Further, by crushing the ruled lines 107, when the contents 150 are transferred to the storage container, the contents 150 are prevented from being caught by the ruled lines 107 and remaining. The material of the sheet material may be a sealant layer, and any one or both of the outermost layer and the re-inner layer may be a thermoplastic resin or a hot melt adhesive. Further, the sheet material does not necessarily include paper.

  6 is a cross-sectional view showing a usage state of the packaging container shown in FIG. A tank 700 shown in FIG. 6 is a tank dedicated to a coffee machine for extracting several types of coffee such as espresso and cappuccino, and is used to store powder such as instant coffee therein. In FIG. 6, illustration of parts other than the refill port of the tank 700 is omitted.

  The opening 701 of the tank 700 is covered with a sheet-like rubber material 702 having a hole in the center. Further, the rubber material 702 is formed with cuts extending radially from the central hole, and the central portion can be opened and closed by pressing from the outside. An opening member 703 for breaking the seal lid 160 is provided at the center of the tank 700. The upper part of the opening member 703 protrudes outward from the central hole of the rubber material 702.

  As shown in FIG. 6A, when refilling, the packaging container 110 is pushed inward of the tank 700 with the seal lid 160 facing the opening 701 of the tank 700.

  When the sealing lid 160 is broken by the opening member 703, the discharge part 103 of the packaging container 110 pushes the center part of the rubber material 702 and spreads inside the opening part 701 of the tank 700 as shown in FIG. Inserted into. In this state, the contents 150 flow into the tank 700 along the inner surface of the funnel part 101.

  However, when the packaging container 110 is pushed in from the state of FIG. 6A, the packaging container 110 is not necessarily pushed right below, and may be pushed obliquely downward. When the packaging container 110 is pushed obliquely downward, when the discharge unit 103 comes into contact with the rubber material 702, the discharge unit 103 has an oblique direction (for example, the arrow direction shown in FIG. 6A). A pressing force is applied. In the present embodiment, the entire funnel part 101 is not deformed by the pressing force applied to the funnel part 101, but only the discharge part 103 is deformed at the boundary A, and the deformation of the funnel part 102 is effectively suppressed. Is done.

(Second Embodiment)
The second embodiment of the present invention will be described below. In FIG. 7, the longitudinal cross-sectional view of the funnel part 301 which concerns on this embodiment is shown. The funnel part 301 is different from the funnel part 101 according to the first embodiment in that the folded portion 406 has a corrugated edge. The other parts are the same and have the same reference numerals. The difference in the shape of the folded portion is due to the difference between the shape of the blank material used for manufacturing the funnel part 301 and the shape of the blank material used for manufacturing the funnel part 101.

  In the process of forming the funnel part 301, when the narrow-mouthed portion of the truncated cone-shaped intermediate body is folded back and the taper angle is approximately 10 ° or more, the circumference of the crease portion and the vicinity of the edge of the sheet material The difference with the circumference of the sheet becomes large, and this difference cannot be absorbed by the elongation of the sheet material. Therefore, at the time of folding, the edge of the folded portion may receive a large pulling force along the circumferential direction and may be broken.

  FIG. 8 is a top view (a) and a front view (b) showing the intermediate body 203 when a breakage occurs due to folding. As shown in FIG. 8, when the folded portion 206 breaks, the opening 106 does not have a circular shape but has a polygonal shape with the tip of the broken portion serving as a vertex, stress is concentrated on the vertex, and is easily broken. The heights of these vertices are not uniform, the top surface of the opening 106 is not flat, and there is a possibility of affecting the sealing of the edge of the open end of the container body 120 with the seal lid 160. May deteriorate. In addition, if a slit is provided in the folded portion 206 in advance, it is possible to prevent a new fracture from occurring at the time of folding, but there is a possibility that similar quality deterioration may occur due to the slit itself.

  On the other hand, the folded portion 406 of the present embodiment does not receive a large tensile force at the portion that is the wavy crest (the portion that is far from the folded position that is the edge of the opening 106). Moreover, since the stress is more easily dispersed in the portion that becomes the valley of the wavy line as compared with the case of providing the slit that is an acute cut, the above-described quality deterioration can be prevented. Therefore, in the present embodiment, the step of folding and folding the folded portion 406 can be performed before the step of forming the discharge portion 103 and removing the taper.

  In addition, since the incurl mold used when folding the folding part 406 does not receive a large resistance from the edge of the folding part 406, the folding process can be performed with a small press pressure. Therefore, it is possible to reduce manufacturing defects such as buckling of the funnel part 301 by folding a portion other than the folding line without almost applying liquid paraffin that improves the slidability of the mold and the sheet material.

(Third embodiment)
FIG. 9 is a top view and a front view of a funnel part according to a third embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along line CC in FIG.

  The funnel part 501 according to the third embodiment is different from the first and second embodiments in the shapes of the funnel part and the side wall part. Hereinafter, the description of the same configuration as that of the first or second embodiment will be omitted.

  The funnel 502 is formed in a tapered shape to be rotated with respect to the central axis. The funnel 502 includes a first tapered portion 512 on the wide-mouth side and a second tapered portion 522 on the narrower side than the first tapered portion 512. Composed. The taper angle θ2 of the second taper portion 522 is larger than the taper angle θ1 of the first taper portion 512. Further, the discharge portion 503 is formed in a tapered shape to be rotated with respect to the central axis, and has a taper angle indicated by θ3. As in the first embodiment, θ3 is preferably set in the range of 0 to 15 °. Moreover, as shown in FIG. 10, the folding | returning part 606 in the discharge part 503 has a waveform edge. Further, an embossed groove 508 is formed on the outer surface of the funnel part 501 extending from the first tapered portion 512 to the discharge portion 503. The grooves 508 are provided radially along the intersecting line between the plane including the central axis of the funnel part 501 and the funnel part 501. Further, as shown in FIG. 9A, the side wall 504 is formed in a waveform in which the distance from the center axis of the funnel portion 502 increases or decreases in a cross section orthogonal to the center axis of the funnel part 501. Note that the side wall 504 is only required to have a part including the upper edge of the side wall 504 having a corrugated shape.

  The funnel part 501 produced as described above is attached to the inside of the container main body 120 as shown in FIG. The funnel part 501 is attached by heating the side wall part 504 with hot air to melt the sealant, and then inserting the funnel part 501 into the container body 120 and expanding the side wall part 504 of the funnel part 501 to expand the container body 120. This is done by crimping to the inner surface.

  In the process of forming the funnel part 501, when the side wall portion is formed by simply folding back the end portion on the wide mouth side of the truncated cone-shaped intermediate body, the bent portion (that is, the connecting portion between the side wall portion and the funnel portion), the side wall As shown in FIG. 11, the upper end edge of the side wall is warped due to the difference in circumferential length with the upper end edge of the portion. When there is such a warp, when inserting the funnel parts heated with hot air into the container body, the outer surface of the side wall part rubs against the open end or the inner surface of the container body to generate resin waste, or the side wall part and the container The adhesive strength with the main body is lowered.

  On the other hand, since the side wall part 504 of the funnel part 501 according to the third embodiment has a wavy cross-sectional shape, it can absorb the difference in the peripheral length of the side wall part 504 described above, and the upper edge of the side wall part 504 Can suppress warping. In addition, since the wavy side wall portion 504 is stretchable, the outer diameter of the side wall portion 504 is designed to be slightly smaller than the inner diameter of the container body 120, and the side wall portion 504 is pushed and widened at the time of joining. Rubbing when inserted into the main body 120 can be prevented.

  Referring to FIG. 12, the funnel part 501 according to this embodiment includes a first taper part 512 and a second taper part 522 having different taper angles. By configuring in this way, the funnel part 501 is easily deformed at the boundary A between the discharge portion 503 and the second tapered portion 522 and the boundary B between the second tapered portion 522 and the first tapered portion 512. The pressing force applied to the discharge unit 503 due to the deformation can be absorbed. For example, the container main body shown in FIG. 12 is stacked and transported or stored vertically. Moreover, the discharge part 503 may be pressed with the cover material provided in a filling nozzle at the time of content filling. In these cases, buckling of the funnel part 501 is effectively suppressed by the funnel part 501 deforming and absorbing the pressing force applied to the discharge unit 503. In the third embodiment, buckling can be prevented even when a larger external force is applied due to the cushioning property imparted to the funnel part 501.

As an example, using a sheet of polyethylene having a thickness of 30 μm on the front and back of a paper weighing 300 g / m ² (thickness 350 μm), the height is 45 mm, the outer diameter on the wide mouth side is 94 mm, and the outer diameter on the narrow mouth side is When the 64 mm funnel part 501 was produced, buckling did not occur even when the height of the funnel part 501 was deformed by 3 mm (a load of 120 N was applied to the tip of the discharge part of the funnel part).

  In addition, as shown in FIG. 12, the funnel part 501 is configured such that the open end of the discharge part 503 slightly protrudes outward from the plane including the edge of the open end of the container body 120. It is joined to the inside of the container body 120. As a result, after the opening 506 is sealed with a seal lid (not shown), the tip of the discharge portion 503 constantly presses the seal lid, so that the contents (not shown) are unlikely to go outside the funnel part 501. Become.

(Modification of the third embodiment)
In the funnel part according to the third embodiment, a side wall portion having a wavy cross section may be formed by embossing.

(Fourth embodiment)
FIG. 13 is a perspective view of a funnel part according to the fourth embodiment.

  The funnel part 701 according to the fourth embodiment includes a funnel part and a discharge part similar to the funnel part 501 according to the third embodiment, but the side wall part 704 is different from the third embodiment. The side wall portion 704 is formed by folding the edge portion of the opening on the wide-mouth side outward. The side wall portion 704 is provided with a plurality of ruled lines 707 extending in a direction parallel to the central axis of the funnel portion. Yes.

  In the step of forming the side wall portion 704, the folded portion is compressed in the circumferential direction by narrowing the folded portion on the wide-mouth side with a mold. Further, as a result of drawing, the outer diameter of the side wall 704 is designed to be smaller than the inner diameter of the container body before the funnel part 701 is attached to the container body. The side wall portion 704 is spread by a mold and welded to the inner surface of the container body after the funnel part 701 is inserted into the container body. By providing the ruled line 707 in this manner and extending or contracting the side wall portion 704, the sealant is removed from the container body when the sealant on the outer surface of the side wall portion 704 is melted and inserted into the container body, as in the third embodiment. It is possible to prevent the resin scraps from being rubbed on the inner surface and the welding strength from being lowered.

  As described above, by punching a sheet material containing paper and then pressing it, a funnel part that retains strength can be provided at low cost. Moreover, resource saving can be achieved compared with the case where the conventional resin funnel parts are provided. It should be noted that such a funnel part manufacturing method can be applied in various ways to other molded articles such as paper cups. Further, the present invention can be applied not only to a molded product having a circular cross section but also to a molded product having a polygonal cross section.

  INDUSTRIAL APPLICABILITY The present invention is useful for molded products such as funnel parts used for packaging containers and the like for transferring contents to other containers, and methods for producing these.

101, 301, 501, 701, 930, 940 Funnel part 102, 502, 931 Funnel part 103, 503, 991 Discharge part 104, 504, 704, 932, 942 Side wall part 105, 106 Funnel part opening 508 Groove 107, 707 Ruled line 110, 900, 910 Packaging container 120, 920 Container body 150, 950 Contents 160, 960 Seal lid 201 Blank material 203 Intermediate 206, 406, 606 Folded part

Claims (4)

A funnel part that is fitted into a cylindrical container body having an open end, a bottom, and a side wall, and constitutes a packaging container for transferring contents to a storage container,
A funnel portion whose diameter increases from the narrow mouth side toward the wide mouth side;
A cylindrical discharge portion connected to the narrow side edge;
A cylindrical side wall portion surrounding the opening on the wide mouth side of the funnel portion, connected to the funnel portion, and fitted into the container body;
The funnel part, the discharge part, and the side wall part are integrally formed using a sheet material including paper and a sealant layer,
A funnel part in which an opening portion of the discharge portion is provided with a folded portion in which the sheet material is folded and welded over the entire circumference. The funnel portion includes a first taper portion on the wide mouth side and a second taper portion on the narrow mouth side from the first taper portion,
The funnel part according to claim 1, wherein a taper angle of the second taper portion is larger than a taper angle of the first taper portion.   The funnel part according to claim 1 or 2, wherein the folded portion of the sheet material has a corrugated edge. A packaging container for transferring contents to a storage container,
A cylindrical container body having an open end, a bottom and a side wall;
The funnel part according to any one of claims 1 to 3, wherein the narrow mouth portion is fitted into the container body toward the open end of the container body,
A packaging container comprising: a sealing lid that seals an open end of the container body and is broken by receiving a pressing force from the outside.

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