Container with lid

Abstract

To provide a lidded container that can be improved in airtightness when sealed again.SOLUTION: A lidded container comprises a paper cup 2 which is formed of a laminate having a thermal adhesive resin layer arranged on an inner surface side of a paper layer, a flange part 10 which is an annular resin molding fitted and deposited at an upper end part of the paper cup 2, and a lid material 20 which is a resin molding threadedly engaged with the flange part 10, and the lid material 20 tightly contacts an upper surface of the flange part 10 when threadedly engaged with the flange part 10.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a container with a lid that opens and closes a paper cup with a resin-molded lid material. [Background technology]

[0002] A conventional container with a lid is disclosed in Patent Document 1. This container with a lid includes a paper cup, a resin-molded ring, and a resin-molded lid. The ring is welded to the top end of the paper cup. The lid has a protrusion that engages with the outer periphery of the ring, and is removably attached to the ring. The lid can be removed from the ring to remove the contents, and the lid can be engaged with the ring to reseal the container with the lid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 3060579 (pages 2-3, Figure 2) Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the above-mentioned conventional lidded containers, the lid is closed by engaging the protrusions, so that the airtightness is low, and there is a risk of the contents, such as liquid, leaking if the container is tipped over in a resealed state.

[0005] An object of the present invention is to provide a lidded container that can improve airtightness when resealed. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the lidded container of the present invention comprises a paper cup formed from a laminate having a heat-adhesive resin layer disposed on the inner surface of a paper layer, a flange portion of an annular resin molded product welded to the upper end of the paper cup, and a lid material of a resin molded product that screws onto the flange portion, and is characterized in that when the lid material is screwed onto the flange portion, it fits closely axially against the upper surface of the flange portion.

[0007] The present invention is also characterized in that, in the lidded container of the above configuration, the lid material has a ring-shaped protrusion facing the upper surface of the flange portion, and when the lid material is screwed onto the flange portion, the protrusion comes into close contact with the upper surface of the flange portion.

[0008] The present invention is also characterized in that, in the lidded container of the above configuration, the lid material has an annular support portion having a threaded portion that screws onto the flange portion, an opening / closing portion that is connected to the support portion via a hinge portion, and a first annular rib that protrudes axially from the inner surface of the opening / closing portion, and when the opening / closing portion is closed, the first rib is in close radial contact with the support portion.

[0009] The present invention is also characterized in that, in the lidded container of the above configuration, it has a ring-shaped second rib protruding axially from the upper surface of the support part, and when the opening / closing part is closed, the first rib is in close radial contact with the second rib.

[0010] Furthermore, in the lidded container of the present invention having the above-described configuration, the first rib is in close contact with the inner peripheral surface of the support portion when the opening / closing portion is closed.

[0011] The present invention is also characterized in that, in the lidded container of the above configuration, the flange portion has a flat portion arranged on the upper surface of the paper cup and a bent portion bent downward from the outer peripheral edge of the flat portion, and a threaded portion that screws into the support portion is provided on the outer peripheral surface of the bent portion.

[0012] The present invention is also characterized in that, in the lidded container of the above configuration, the flange portion has a flat portion arranged on the upper surface of the paper cup and an upright portion erected on the upper surface of the flat portion, and a threaded portion that screws into the support portion is provided on the outer surface of the upright portion.

[0013] Furthermore, the present invention is characterized in that in the lidded container having the above-mentioned structure, the upper surface of the flange portion is formed flat, and a sealing film is provided which is peelably welded to the upper surface. [Effects of the Invention]

[0014] According to the present invention, the lid is screwed onto the flange welded to the upper end of the paper cup and is in close axial contact with the upper surface of the flange, thereby improving the airtightness of the lidded container. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a lidded container according to a first embodiment of the present invention; [Figure 2] FIG. 1 is a perspective view showing a state in which the opening / closing part of a lidded container according to a first embodiment of the present invention is open. [Figure 3] FIG. 1 is a longitudinal cross-sectional view of a lidded container according to a first embodiment of the present invention. [Figure 4] Detailed view of part A in Figure 3 [Figure 5] Detailed view of part B in Figure 3 [Figure 6] FIG. 10 is a longitudinal cross-sectional view of a lidded container according to a second embodiment of the present invention. [Figure 7] Detailed view of part C in Figure 6 [Figure 8] FIG. 10 is a longitudinal cross-sectional view of a lidded container according to a third embodiment of the present invention. [Figure 9] Detailed view of part D in Figure 8 DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment Embodiments of the present invention will be described below with reference to the drawings. Figures 1 and 2 show perspective views of a lidded container 1 of a first embodiment with the opening / closing portion 31 of the lid member 20 in a closed state and an open state. The lidded container 1 comprises a paper cup 2, a flange portion 10, a sealing film 3 (see Figure 3), and the lid member 20. The lidded container 1 stores contents such as beverages, powdered foods, etc. The contents of the lidded container 1 may be other than liquids or powders.

[0017] The paper cup 2 is formed from a laminate of a protective layer, a paper layer, a barrier layer, and a thermally adhesive resin layer, in that order, and is formed into a cylindrical shape with a bottom and an opening 2a on the top surface. The protective layer is made of polyethylene or the like, and protects the outer surface of the paper layer. The barrier layer is made of metal foil (aluminum foil or the like), metal vapor deposition film (aluminum vapor deposition film or the like), oxide vapor deposition film (silicon oxide vapor deposition film, aluminum oxide vapor deposition film or the like), and prevents the intrusion of oxygen and water vapor. The thermally adhesive resin layer is made of a thermally adhesive resin such as polyethylene, and is arranged on the inner surface of the paper cup 2. The protective layer and barrier layer may be omitted.

[0018] The flange 10 is formed into an annular shape from a resin molded product and is welded to the upper end of the paper cup 2. The sealing film 3 (see Figure 3) is made of a resin film and is releasably welded to the upper surface of the flange 10. The lid 20 is made of a resin molded product and has an annular support part 21 that screws onto the flange 10 and an opening / closing part 31 that opens and closes the upper surface of the support part 21. The opening / closing part 31 is connected to the support part 21 by a hinge part 32.

[0019] Figure 3 shows a longitudinal cross section of the lidded container 1. Figures 4 and 5 show detailed views of part A and part B, respectively, of Figure 3. A curled part 2b formed by curling the laminated body is formed at the top end of the paper cup 2 so as to protrude radially outward.

[0020] The flange portion 10 has a fitting portion 11, a flat portion 12, and a bent portion 13, and is welded to the upper end of the paper cup 2, including the curled portion 2b, by ultrasonic welding or the like. The fitting portion 11 is formed in an annular shape and is welded to the inner surface of the paper cup 2. The flat portion 12 extends radially outward from the upper end of the fitting portion 11 and is disposed on the upper surface of the curled portion 2b. The upper surface of the flat portion 12 is formed flat, and the sealing film 3 is welded to it. The bent portion 13 is bent downward from the outer peripheral end of the flat portion 12, and a male screw portion 14 (thread portion) is formed on the outer peripheral surface.

[0021] The support portion 21 of the lid member 20 is disposed on the upper surface of the flange portion 10. An annular rib 23 and a rib 24 (second rib) are concentrically formed on the upper surface of the support portion 21. The support portion 21 is provided with an annular protrusion 28 that faces the flat portion 12 in the axial direction. The outer peripheral wall 26 of the support portion 21 faces the bent portion 13 of the flange portion 10 and has a female thread portion 27 that screws into the male thread portion 14. The male thread portion 14 and the female thread portion 27 screw into each other, so that the protrusion 28 of the support portion 21 comes into close contact with the flange portion 10 in the axial direction.

[0022] The opening / closing portion 31 of the lid member 20 rotates around a hinge portion 32 as a fulcrum to open and close the top surface of the support portion 21. The opening / closing portion 31 has an annular locking portion 35 and a rib 33 (first rib). The locking portion 35 protrudes radially from the inner surface of the outer wall 36 of the opening / closing portion 31. The rib 33 protrudes downward from the inner surface of the opening / closing portion 31. When the opening / closing portion 31 is closed, the rib 33 comes into close radial contact with the rib 24 of the support portion 21, and the locking portion 35 comes into close radial contact with the rib 23. Note that the rib 33 comes into close contact with the inner surface of the rib 24 (the inner surface of the support portion 21), but it may also come into close contact with the outer surface of the rib 24.

[0023] A latching claw 34 is provided on the outer peripheral surface of the outer peripheral wall 36 of the opening / closing part 31, protruding radially outward at a position radially opposite the hinge part 32. A recess 22 is formed on the outer peripheral surface of the outer peripheral wall 26 of the support part 21 at the same circumferential position as the latching claw 34. The opening / closing part 31 can be opened by hooking a finger on the latching claw 34.

[0024] In the lidded container 1 configured as described above, the screw portions (male screw portion 14 and female screw portion 27) are loosened to remove the lid member 20 from the flange portion 10, and the sealing film 3 is peeled off. Then, the female screw portion 27 is screwed onto the male screw portion 14, and the lid member 20 is attached to the flange portion 10. This allows the opening / closing portion 31 to be opened and the contents in the paper cup 2 to be taken out.

[0025] The opening / closing portion 31 is then closed to reseal the lidded container 1. At this time, the protrusions 28 come into close contact with the flat surface 12 of the flange portion 10 in the axial direction, and the ribs 33 come into close contact with the ribs 24 of the support portion 21 in the radial direction, so that the locking portions 35 come into close contact with the ribs 23 in the radial direction. This allows for increased airtightness when the lidded container 1 is resealed.

[0026] According to this embodiment, the lid member 20 is screwed onto the flange portion 10 welded to the upper end of the paper cup 2, and is in axially tight contact with the upper surface of the flange portion 10. This improves the airtightness of the lidded container 1.

[0027] Furthermore, the lid member 20 has an annular protrusion 28 that faces the upper surface of the flange portion 10, and when the lid member 20 is screwed onto the flange portion 10, the protrusion 28 comes into tight contact with the upper surface of the flange portion. Therefore, the protrusion 28, which has a narrow radial width, can reliably bring the lid member 20 into tight contact with the upper surface of the flange portion 10. This further improves the airtightness of the lidded container 1.

[0028] Furthermore, when the opening / closing part 31 is closed, the rib 33 (first rib) comes into close contact with the support part 21 in the radial direction, so that the airtightness of the lidded container 1 can be further improved.

[0029] At this time, the rib 33 comes into close radial contact with the annular rib 24 (second rib) that protrudes in the axial direction from the upper surface of the support portion 21 and forms the inner peripheral surface of the support portion 21. Therefore, the rib 33 and the support portion 21 can be easily brought into close radial contact with each other.

[0030] Furthermore, since the sealing film 3 is peelably welded to the upper surface of the flange portion 10, the lidded container 1 can be sealed before opening. At this time, since the upper surface of the flange portion 10 is formed flat without any protrusions such as ribs, the sealing film 3 can be easily welded.

[0031] The flange 10 has a flat portion 12 disposed on the top surface of the paper cup 2 and a bent portion 13 bent downward from the outer peripheral edge of the flat portion 12, and a male screw portion 14 (thread portion) that screws into the support portion 21 is provided on the outer peripheral surface of the bent portion 13. This makes it easy to realize the flange 10 that screws into the lid 20.

[0032] Second Embodiment Next, Fig. 6 shows a vertical cross-sectional view of a lidded container 1 of a second embodiment, and Fig. 7 shows a detailed view of part C in Fig. 6. For ease of explanation, parts similar to those of the first embodiment shown in Figs. 1 to 5 above are given the same reference numerals. The lidded container 1 of this embodiment differs from the first embodiment in the structure of the flange portion 10 and the support portion 21. Other parts are similar to those of the first embodiment.

[0033] The flange portion 10 has an upright portion 15 that stands on the upper surface of the flat portion 12 that is disposed on the curled portion 2b of the paper cup 2. A male screw portion 14 (thread portion) is provided on the outer peripheral surface of the upright portion 15. An outer peripheral wall 26 of the support portion 21 of the lid member 20 faces the upright portion 15, and a female screw portion 27 screws into the male screw portion 14. The upper surface of the upright portion 15 is formed flat, and when the lid member 20 is closed, a protrusion 28 of the support portion 21 comes into close contact with the upper surface of the upright portion 15.

[0034] An annular rib 25 is formed on the upper surface of the support part 21 of the lid member 20. A claw part 25a that protrudes radially outward is provided at the top of the rib 25. When the opening / closing part 31 is closed, the rib 33 of the opening / closing part 31 comes into close radial contact with the inner peripheral surface of the support part 21. At this time, the locking part 35 of the opening / closing part 31 engages with the claw part 25a, thereby reliably holding the opening / closing part 31 closed.

[0035] According to this embodiment, the lid member 20 is screwed onto the flange portion 10 welded to the upper end of the paper cup 2, and is in axially tight contact with the upper surface of the flange portion 10. This improves the airtightness of the lidded container 1.

[0036] Furthermore, when the opening / closing part 31 is closed, the rib 33 (first rib) comes into close contact with the support part 21 in the radial direction, thereby further improving the airtightness of the lidded container 1. At this time, the rib 33 comes into close contact with the inner peripheral surface of the support part 21, so the rib 33 and the support part 21 can be easily brought into close contact with each other in the radial direction.

[0037] <Third embodiment> Next, Fig. 8 shows a vertical cross-sectional view of a lidded container 1 of a third embodiment, and Fig. 9 shows a detailed view of part D in Fig. 8. For ease of explanation, parts similar to those of the second embodiment shown in Figs. 6 to 7 above are given the same reference numerals. The lidded container 1 of this embodiment differs from the second embodiment in the configuration of the lid member 20. Other parts are similar to those of the second embodiment.

[0038] The lid member 20 is formed in a cap shape with a closed top surface. The outer peripheral wall 20a of the lid member 20 faces the erected portion 15 of the flange portion 10 and has a female thread portion 27 that screws into the male thread portion 14. The male thread portion 14 and the female thread portion 27 screw into each other, so that the protrusion portion 28 of the support portion 21 comes into close contact with the flange portion 10 in the axial direction.

[0039] According to this embodiment, the lid material 20 is screwed onto the flange portion 10 welded to the upper end of the paper cup 2 and is in tight axial contact with the upper surface of the flange portion 10, thereby improving the airtightness of the lidded container 1.

[0040] The lid member 20 of this embodiment may be configured to be screwed onto the flange portion 10 of the lidded container 1 of the first embodiment. [Industrial Applicability]

[0041] The present invention can be used in resealable containers with lids. [Explanation of symbols]

[0042] 1 container with lid 2 paper cups 2a opening 2b Curl part 3. Sealing film 10 Flange 11 Fitting part 12 Plane part 13 Bend 14 Male thread 15 Standing section 20 Lid material 20a outer wall 21 Support part 22 recess 23, 24, 25, 33 Ribs 25a Claw part 26 Outer wall 27 Female thread 28 Protrusion 31 Opening and closing section 32 Hinge part 34 Latching claw 35 Locking part 36 Outer wall

Claims

1. The paper cup is formed of a laminate having a thermal adhesive resin layer disposed on the inner surface side of a paper layer, a flange portion of an annular resin molded product welded to the upper end of the paper cup, and a lid material of a resin molded product screwed to the flange portion, The lid member has an annular support portion having a thread portion that screws into the flange portion, an opening / closing portion that is connected to the support portion via a hinge portion, and an annular first rib that protrudes in the axial direction from an inner surface of the opening / closing portion, and when the opening / closing portion is closed, the first rib comes into close contact with the support portion in the radial direction, The flange portion has a flat portion disposed on the upper surface of the paper cup and a bent portion bent downward from the outer peripheral edge of the flat portion, and a thread portion that screws into the support portion is provided on the outer peripheral surface of the bent portion, A lidded container characterized in that when the lid material is screwed onto the flange portion, it comes into close contact with the upper surface of the flange portion in the axial direction.

2. The lidded container according to claim 1, characterized in that the lid material has an annular protrusion facing the upper surface of the flange portion, and when the lid material is screwed onto the flange portion, the protrusion is in tight contact with the upper surface of the flange portion.

3. A lidded container as described in claim 1 or claim 2, characterized in that it has a ring-shaped second rib protruding axially from the upper surface of the support portion, and when the opening / closing portion is closed, the first rib is in close radial contact with the second rib.

4. 3. The lidded container according to claim 1, wherein the first rib is in close contact with an inner peripheral surface of the support portion when the opening / closing portion is closed.

5. The upper surface of the flange portion is formed flat, and a sealing film is peelably welded to the upper surface. The container with lid according to any one of claims 1 to 4, characterized in that it comprises:

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