JP2008308228A - Container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container having a reclosable container body made primarily of paper, and containing plastics of less than 50% of the total weight of the container. <P>SOLUTION: The container 10 is made reclosable by welding an annular spout member 200 made by injection molding a thermoplastic resin on the inside face of the upper end opening section of the container body 100 comprising paper pipe or a paper cup, and a lid member 300 is engaged with the annular spout member 200. Alternatively, the container can be made reclosable by welding the annular spout member integrally connected with the lid member at a joining section in the upper section and formed by injection molding the thermoplastic resin in the inside face of the upper end opening section of the container body comprising the paper pipe or the paper cup. Moreover, a molding material made by mixing the paper not less than 50 wt.% into the thermoplastic resin may be used. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a container for storing fruit drinks, liquid foods such as liquor, confectionery such as chocolate, gum, and candy, supplements, accessories, etc., and in particular, a container body used as a substitute for conventional plastic containers and glass bottles. It relates to containers made mainly of paper.

  Recently, from the standpoint of environmental protection, paper-based containers have been developed as an alternative to plastic containers and glass bottles that have been used in the past. As a container mainly composed of this type of paper, for example, an annular mouth member injection-molded with a thermoplastic resin is welded to the upper end opening of a paper cup, and after filling the container with the contents, the upper surface of the flange portion of the annular mouth member Containers that are heat-sealed and sealed in a peelable manner are used as containers for fruit juices, liquid foods such as sake, and granular or granular confectionery.

  However, the above-described container mainly composed of a paper cup is one in which the sealing film is heat-sealed to the annular mouth member so as to be peeled off, and the container is once peeled off from the annular mouth member. When opened, the container with the remaining contents could not be reclosed (resealed).

  On the other hand, for example, a wet tissue composite container disclosed in Patent Document 1 below is known as a container mainly made of paper provided with a lid that can reclose an opening. In the container disclosed in this document, a frame member formed of synthetic resin is welded to an opening of a container main body mainly made of paper, and an extraction cap member (lid body) formed of synthetic resin is screwed to the frame member. Configured. At the time of manufacturing the container, when the frame member is welded to the opening of the container main body, the edge of the opening of the paper container main body is curled outward, and the rim portion bent at a substantially right angle is attached to the frame member. The lower surface of the annular flange portion protruding outward from the outer peripheral surface is welded.

However, in the structure disclosed in Patent Document 1 described above, in order to ensure the adhesive strength between the paper container body and the frame member, the width of the flange portion of the frame member needs to be relatively wide. The outer diameter of the container becomes unnecessarily large. At the same time, it is necessary to increase the width of the rim portion of the opening of the container main body, and there is a problem that the paper tube is difficult to process and the sealing property is lacking. In particular, when the flange portion of the frame member is welded to the rim portion, the flange portion is partially melted to perform the bonding function, and accordingly, the strength of the flange portion is lowered and the reliability is lowered. Furthermore, based on these points, it is necessary to increase the width of the flange portion and to require a certain thickness, so that the weight ratio of the frame member to the container body increases, and the extraction cap member is removed. However, the container main body with the frame member cannot be disposed of as paper, and the disposal process is very expensive.
Japanese Utility Model Publication No. 57-159673 (page 4, lines 5 to 12, line 2)

  The present invention solves the problems of the above-described conventional containers, has a container body mainly composed of paper and can be reclosed, and the amount of plastic is less than 50% of the total weight of the container. A container is provided.

  That is, according to a first aspect of the present invention, the container main body includes a paper tube having a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to another thermoplastic resin on the inner surface, and the upper end opening of the paper tube An annular mouth member injection-molded with a thermoplastic resin is welded to the inner surface of the part, and a lid member is engaged with and attached to the annular mouth member to enable reclosing.

  Next, a second invention of the present invention is the container according to the first invention, wherein the lid member is formed by injection molding of a thermoplastic resin.

  Next, a third invention of the present invention includes a paper tube in which the container main body has a weld layer made of a thermoplastic resin which is resistant to contents and can be welded to another thermoplastic resin, and the upper end of the paper tube. The container is characterized in that an annular mouth member injection-molded with a thermoplastic resin with which a lid member is integrally connected to the upper surface of the opening at the connecting portion is welded to enable reclosing.

  Next, a fourth invention of the present invention is a paper cup in which the container body has a welding layer made of a thermoplastic resin which is resistant to contents and can be welded to another thermoplastic resin on the inner surface, and an upper end opening of the paper cup. An annular mouth member injection-molded with a thermoplastic resin is welded to the inner surface, and a lid member is attached to the annular mouth member to enable reclosing.

  Next, a fifth aspect of the present invention is the container according to the fourth aspect, wherein the lid member is formed by injection molding a thermoplastic resin.

  Next, a sixth invention of the present invention is a paper cup in which the container main body has a welded layer made of a thermoplastic resin which is resistant to contents and can be welded to another thermoplastic resin, and an upper end opening of the paper cup. The container is characterized in that an annular mouth member injection-molded with a plastic resin with a lid member integrally connected to the upper surface by a connecting portion is welded to the inner surface to enable reclosing.

  Next, according to a seventh aspect of the present invention, the annular mouth member has an annular flange portion that comes into contact with the upper end opening of the paper container body, and the lid member is disposed on the outer surface of the flange portion. 1 to 2, characterized in that a mouth tube having an engaging portion is erected, and a cylindrical weld portion having an outer peripheral surface welded to the inner surface of the upper end opening portion is suspended on the lower surface of the flange portion. 6. The container according to any one of the inventions.

  Next, an eighth aspect of the present invention is the container according to the seventh aspect, wherein the outer peripheral surface of the cylindrical welded portion is inclined downward and inward.

  Next, according to a ninth aspect of the present invention, a plurality of annular protrusions that melt and function as adhesives are spaced apart from each other on the outer peripheral surface of the cylindrical welded portion and are integrally projected from the outer peripheral surface. A container according to the seventh or eighth invention, wherein

  Next, according to a tenth aspect of the present invention, the annular projection is curved or sharpened so that the surface contacting the inner surface of the upper end opening of the paper container body is small before melting. The container according to the ninth invention, which is characterized in that

  Next, according to an eleventh aspect of the present invention, an adhesive surface between the outer peripheral surface of the tubular welded portion and the inner surface of the upper end opening of the paper container body is inclined with respect to the axial direction of the paper container body. The container according to any one of the eighth to tenth inventions.

  Next, a twelfth aspect of the present invention is characterized in that the annular mouth member and / or the lid member are injection-molded with a molding material obtained by mixing more than 50% by weight of waste paper with a thermoplastic resin. The container according to 2 or 5th invention.

  The thirteenth aspect of the present invention is characterized in that the lid member, the connecting portion, and the annular mouth member are integrally injection-molded with a molding material in which a waste paper is mixed in a thermoplastic resin in an amount of more than 50% by weight. It is a container as described in 3rd or 6th invention.

  In the container of the present invention, an annular mouth member is welded to the inner surface of the upper end opening of a container body made of a paper tube or paper cup having a weld layer on the inner surface, and a lid member is engaged (screwed or occluded) with the annular mouth member. Therefore, after opening the lid member and taking out a necessary amount of the contents, the container can be closed again with the lid member.

  Alternatively, in the container of the present invention, an annular mouth member is integrally welded to the inner surface of the upper end opening portion of the container main body made of a paper tube or a paper cup having a weld layer on the inner surface. After opening the lid member and taking out the required amount of contents, the container can be reclosed with the lid member.

  In particular, in the container of the present invention, the annular mouth member is welded to the inner surface of the upper end opening of a paper container body such as a paper tube or a paper cup, so that the upper end opening of the container body is curled or widened to the annular mouth member. It is not necessary to provide the flange portion, and the weight ratio of the annular mouth member can be reduced. For this reason, according to this invention, the container main body with the annular opening member attached can be discarded as a paper container, and the disposal cost can be greatly reduced.

  In addition, the container of the present invention can be injection-molded with a molding material in which the annular mouth member, the lid member, and the joining portion are mixed with thermoplastic resin in an amount of more than 50% by weight. However, the amount of plastic can be less than 50% of the total weight of the container.

Next, embodiments of the container of the present invention will be described in detail with reference to the drawings.
1 is a cross-sectional view of the container of Embodiment 1, FIG. 2 is a partial cross-sectional view of the container of Embodiment 2, FIG. 3 is a cross-sectional view of the container of Embodiment 3, and FIG. 6 is a partial cross-sectional view of a container according to Embodiment 4. FIG. The container shown in FIG. 2 and FIG. 4 is omitted from the illustration of the bottom surface portion, but has the bottom surface portion having the same structure as the container shown in FIG. 1 and FIG.

First, the container 10 of Embodiment 1 is demonstrated.
As shown in FIG. 1, the container 10 includes a container body 100, an annular mouth member 200, and a lid member 300.

  The container body 100 is configured by attaching a substantially circular bottom surface portion 120 near the lower end in the axial direction of a substantially cylindrical paper tube 110 having no taper. The paper tube 110 is configured by rolling a substantially rectangular paper and bonding the both ends slightly overlapped. The bottom surface portion 120 is made of paper, and its peripheral edge portion is bent at a substantially right angle downward in the drawing. And the lower end side 111 of the paper tube 110 is folded inward so that the lower end of this substantially annular edge part 121 may be wound. In this manner, the lower end side 111 of the paper tube 110 folded so as to sandwich the edge 121 of the bottom surface 120 from both sides is bonded to the edge 121 by an appropriate method. Here, including the embodiment described below, a case where a substantially cylindrical paper tube 110 is employed will be described. However, the shape of the paper tube 110 is not limited to this, and a rectangular tube shape, an elliptical tube shape, or the like. It may be.

  The inner surface 112 of the paper tube 110 is coated with a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to another thermoplastic resin. In the container 10 of the present embodiment, an annular mouth member 200 injection-molded with a thermoplastic resin is welded to the inner surface 101 (see FIG. 5) of the upper end opening of the container body 100 that is continuous with the inner surface 112. The lid member 300 injection-molded with a thermoplastic resin is engaged with the lid member 300 for reclosing. The method of welding the annular mouth member 200 to the inner surface 101 of the upper end opening of the container body 100 is based on a heat sealing method, an ultrasonic sealing method, an insert injection molding method, or the like. Here, the case where the lid member 300 injection-molded with a thermoplastic resin is employed will be described. However, since the lid member 300 is disposed separately and discarded, the material of the lid member 300 is not limited to this. Absent.

  The annular mouth member 200 has a substantially annular flange portion 210 as shown in a partially enlarged view in FIG. The flange portion 210 has a slightly larger outer diameter than the upper end opening of the paper tube 110, and the upper end 113 of the paper tube 110 is abutted against the lower surface 212. In this embodiment, the upper end 113 of the paper tube 110 is not curled.

  Further, a substantially cylindrical mouth tube 220 is erected integrally on the inner peripheral edge upper surface 211 of the flange portion 210. An engaging portion 221 (male screw) (see FIG. 1) that is screwed to the lid member 300 is integrally formed on the outer peripheral surface 221 of the mouth tube 220. As described above, in the present embodiment, the configuration in which the lid member 300 is screwed into the mouth tube 220 is employed. However, the configuration is not limited thereto, and the lid member 300 may be detachable from the annular mouth member 200. Any configuration may be adopted.

  Further, a substantially cylindrical tubular welded portion 230 that is welded to the inner surface 101 of the upper end opening of the paper container body 100 is integrally suspended from the lower surface 212 of the flange portion 210 at a substantially central position. The outer peripheral surface 231 of the cylindrical welded portion 230 is inclined in a curved shape inward and downward. Thus, by inclining the outer peripheral surface 231 of the cylindrical welded portion 230 toward the lower inner side, the cylindrical welded portion 230 can be easily inserted into the inner side of the upper end opening of the container main body 100, and the annular mouth member 200 is attached. Work can be done easily and reliably.

  Two inclined projections 232 and 233 (annular projections) are provided on the inclined outer circumferential surface 231 so as to be integrally projected from the outer circumferential surface 231 while being spaced apart from each other in the vertical direction. As will be described later, these annular protrusions 232 and 233 melt and function as an adhesive when the annular mouth member 200 is welded to the inner surface 101 of the upper end opening of the container body 100. For this reason, in this embodiment, the surface shape of these annular protrusions 232 and 233 is curved in an arc shape, and the annular protrusions 232 and 233 are spaced apart from each other in the axial direction and arranged with a gap.

  That is, by curving the cross-sectional shape of the annular protrusions 232 and 233, the area where the annular protrusions 232 and 233 come into contact with the inner surface 101 of the upper end opening can be reduced at the initial stage of melting (before melting). The annular protrusions 232 and 233 can be prevented from coming into contact with the inner surface 101 of the upper end opening, and the annular protrusions 232 and 233 can be melted smoothly. In addition, by arranging the annular protrusions 232 and 233 apart from each other in the vertical direction, it is possible to secure a region where the melted material spreads, to perform a function as a double seal, and to improve sealing performance. In addition, the surface shape of the annular protrusions 232 and 233 may be sharpened in a triangular shape, for example, or three or more may be provided as necessary.

  By the way, the annular mouth member 220 having the above structure is usually manufactured by an injection molding method using a thermoplastic resin such as polyethylene. However, in order to reduce the amount of plastic with respect to the total weight of the container, as necessary. Further, it is possible to perform injection molding using a molding material obtained by mixing more than 50% by weight of paper with a thermoplastic resin. Here, “paper” includes “virgin paper” and “used paper”. Thus, by making the material of the annular mouth member 220 mainly composed of paper, the ratio of the paper can be made larger than the amount of plastic in any case where the size of the container 10 is reduced, and the lid member 300 is removed. The state container can be disposed of as paper.

  Furthermore, as shown in FIG. 1, the lid member 300 has a substantially cylindrical peripheral wall 320 integrally suspended on the lower surface of the outer edge of a substantially disk-shaped top plate 310. A substantially cylindrical inner sealing ring 311 is integrally suspended from the lower surface of the top plate 310 inside the peripheral wall 320. The inner sealing ring 311 is positioned and arranged at a position where it is pressed against the inner peripheral surface of the upper end portion of the mouth tube 220 of the annular mouth member 200 described above. The outer peripheral surface 312 of the inner sealing ring 311 is also inclined so as to be bent inwardly downward, and can be easily disposed inside the mouth tube 220 by screwing the lid member 300 into the annular mouth member 220. It has become. Further, on the inner peripheral surface of the peripheral wall 320 of the lid member 300, an engaging portion 321 (female screw) that is screwed with the engaging portion 221 of the annular mouth member 200 is integrally formed.

  The lid member 300 having the above structure is usually manufactured by an injection molding method using a thermoplastic resin such as polyethylene or polypropylene, but in order to reduce the amount of plastic relative to the total weight of the container, if necessary, You may produce by the injection molding method using the molding material which mixed more than 50 weight% of paper with the thermoplastic resin. The “paper” here also includes “virgin paper” and “used paper”. In this case, the lid member 300 can be formed of a paper-based material, and the container with the lid member 300 attached can be discarded as paper.

  As described above, according to the container 10 of the present embodiment, the cylindrical welded portion 230 of the annular mouth member 200 is welded to the inner surface 101 of the upper end opening of the paper container main body 110, so that the flange portion is formed on the upper end of the paper tube 110. And the width of the flange portion 210 of the annular mouth member 200 need not be increased more than necessary, and the outer diameter of the container 10 can be reduced. That is, according to the container 10 of this embodiment, the outer diameter of the annular mouth member 200 can be reduced, the plastic material to be used can be reduced, the weight ratio of the annular mouth member 200 to the paper tube 110 can be reduced, and paper is mainly used. A container can be realized. Specifically, the amount of plastic used can be less than 50% of the total weight of the container 10, and by clearing this condition, the container 10 can be disposed of as a paper container.

  Further, according to the container 10 of the present embodiment, by adjusting the axial length of the cylindrical welded portion 230 that is suspended from the lower surface of the annular mouth member 200, the space between the upper end opening inner surface 101 of the paper tube 110 is adjusted. The bonding area can be increased as much as necessary, sufficient bonding strength can be secured, and the sealing performance can be improved. Furthermore, according to the container 10 of the present embodiment, the annular protrusions 232 and 233 that function as adhesives for welding the annular mouth member 200 are provided on the inner surface 101 of the upper end opening of the paper tube 110, so that the cylindrical welding of the annular mouth member 200 is performed. The part 230 is not melted unnecessarily, and sufficient mechanical strength can be maintained.

  Next, the container 10 of Embodiment 2 is demonstrated with reference to FIG. The container 10 is characterized by a structure in which the lid member 300 is integrally formed with the annular mouth member 200 via the connecting portion 400, and the other structures are substantially the same as those in the first embodiment. For this reason, the same code | symbol is attached | subjected to the component which functions similarly to Embodiment 1 mentioned above, and the detailed description may be abbreviate | omitted.

  As shown in FIG. 2, the container 10 of the present embodiment is a paper tube in which the container body 100 has no taper and has a welded layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins. Yes, an annular mouth member 200 injection-molded with a thermoplastic resin with which a lid member 300 is integrally connected at the upper end opening portion of the container main body 100 with a band-like connecting portion 400 is welded to enable reclosing. It is. The method of welding the annular mouth member 200 to the inner surface 101 (FIG. 5) of the upper end opening of the container body 100 is based on a heat seal method, an ultrasonic seal method, an insert injection molding method, or the like. Further, the connecting portion 400 is not limited to a belt-like connecting portion, and may be a hinge-like connecting portion or the like.

  As shown in FIG. 2, the structure of the annular mouth member 200 includes a mouth tube 220 having an engagement portion 221 (occlusion ring) that engages with the lid member 300 on the outer periphery on the upper surface of the inner peripheral edge of the flange portion 210. A cylindrical welded portion 230 in which an outer peripheral surface that is welded to the upper end opening of the paper container body 100 is inclined downwardly in a curved shape on the lower surface of the flange portion 210 at a substantially central position.

  Further, as shown in FIG. 2, the structure of the lid member 300 connected to the annular mouth member 200 includes a top plate 310 and a peripheral wall 320, and the top plate 310 is connected to the inner periphery of the upper end portion of the mouth tube 220 of the annular mouth member 200. An inner sealing ring 311 that seals the outer peripheral surface against the surface is suspended, and an engagement portion 321 (occlusion ring) that engages with the annular mouth member 200 is provided on the inner peripheral surface of the peripheral wall 320. The annular port member 200 in which the lid member 300 is connected at the connecting portion 400 is usually manufactured by an injection molding method using a thermoplastic resin such as polyethylene, but reduces the amount of plastic relative to the total weight of the container. Therefore, if necessary, injection molding is performed using a molding material obtained by mixing more than 50% by weight of paper with thermoplastic resin.

  The container 10 of the second embodiment can achieve the same effects as the container 10 of the first embodiment described above. In particular, when the container 10 is disposed by integrating the lid member 300 with the annular mouth member 200, the entire container 10 is disposed without separating the lid member 300. By adopting the configuration of the present invention in which the annular mouth member 200 is welded to the inner surface 101 of the upper end opening portion of the paper tube 110 as described above, even a container with the lid member 300 can be discarded as paper.

  Next, the container 10 of Embodiment 3 is demonstrated with reference to FIG. The container 10 is characterized in that the container main body 100 is a tapered paper cup inclined downward inward, and the other structure is substantially the same as the container 10 of the first embodiment described above. Therefore, components that function in the same manner as in the first embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.

  As shown in FIG. 3, the container 10 of the present embodiment is a paper cup having a taper with a container body 100 having a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins on the inner surface. An annular mouth member 200 injection-molded with a thermoplastic resin is welded to the inner surface of the upper end opening of the container body 100, and a lid member 300 injection-molded with a thermoplastic resin is attached to the annular mouth member 200 so that reclosing is possible. It is what. The method of welding the annular mouth member 200 to the inner surface 101 of the upper end opening of the container body 100 is based on a heat sealing method, an ultrasonic sealing method, an insert injection molding method, or the like.

  As shown in FIG. 3, the structure of the annular mouth member 200 is such that a mouth tube 220 having an engaging portion 221 (male thread) that engages with a lid member on the outer periphery is provided on the upper surface of the inner peripheral edge of the flange portion 210. A cylindrical welded portion 230 in which an outer peripheral surface welded to the upper end opening of the paper container main body 100 is inclined downwardly in a curved shape on the lower surface of the flange portion at a substantially central position. The annular mouth member is usually produced by an injection molding method using a thermoplastic resin such as polyethylene. However, in order to reduce the amount of plastic relative to the total weight of the container, a thermoplastic resin may be used as necessary. And injection molding using a molding material mixed with more than 50% by weight of paper.

  As shown in FIG. 3, the lid member 300 has a top plate 310 and a peripheral wall 320, and the outer peripheral surface is pressed against the top plate 310 to the inner peripheral surface of the upper end portion of the mouth tube 220 of the annular mouth member 200. The inner sealing ring 311 to be sealed is suspended, and an engaging portion 321 (female screw) to be screwed with the annular port member 200 is provided on the inner peripheral surface of the peripheral wall 320. The lid member is usually produced by an injection molding method using a thermoplastic resin such as polyethylene or polypropylene. In order to reduce the amount of plastic relative to the total weight of the container, a thermoplastic member may be used as necessary. It is produced by an injection molding method using a molding material obtained by mixing more than 50% by weight of paper with resin.

  The container 10 of the third embodiment can achieve the same effects as the container 10 of the first embodiment described above. That is, the container 10 can also be reclosed with respect to the container main body 100, can be disposed of as a paper container, can improve convenience, and can reduce disposal costs. it can.

  Next, the container 10 of Embodiment 4 is demonstrated with reference to FIG. This container is characterized by a structure in which the lid member 300 is integrally formed with the annular mouth member 200 via the connecting portion 400, and other structures are substantially the same as those of the third embodiment. For this reason, the same code | symbol may be attached | subjected to the component which functions similarly to Embodiment 3 mentioned above, and the detailed description may be abbreviate | omitted.

  As shown in FIG. 4, the container 10 of the present embodiment is a paper cup having a taper with the container body 100 having a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins on the inner surface. An annular mouth member 200 injection-molded with a thermoplastic resin in which the lid member 300 is integrally connected to the upper end opening inner surface 101 of the container main body 100 with a band-like connecting portion 400 is welded to enable reclosing. It is. The method of welding the annular mouth member 200 to the inner surface 101 of the upper end opening of the container body 100 is based on a heat sealing method, an ultrasonic sealing method, an insert injection molding method, or the like. Further, the connecting portion 400 is not limited to a belt-like connecting portion, and may be a hinge-like connecting portion.

  As shown in FIG. 4, the structure of the annular mouth member 200 includes a mouth tube 220 having an engagement portion 221 (occlusion ring) that engages with the lid member 300 on the outer periphery on the upper surface of the inner peripheral edge of the flange portion 210. A cylindrical welded portion 230 in which an outer peripheral surface that is welded to the upper end opening of the paper container body 100 is inclined downwardly in a curved shape on the lower surface of the flange portion 210 at a substantially central position.

  Further, as shown in FIG. 4, the structure of the lid member 300 connected to the annular mouth member 200 includes a top plate 310 and a peripheral wall 320, and the top plate 310 is connected to the inner periphery of the upper end portion of the mouth tube 220 of the annular mouth member 200. An inner sealing ring 311 that seals the outer peripheral surface against the surface is suspended, and an engagement portion 321 (occlusion ring) that engages with the annular mouth member 200 is provided on the inner peripheral surface of the peripheral wall 320. The annular port member 200 in which the lid member 300 is connected at the connecting portion 400 is usually manufactured by an injection molding method using a thermoplastic resin such as polyethylene, but reduces the amount of plastic relative to the total weight of the container. Therefore, if necessary, injection molding is performed using a molding material obtained by mixing more than 50% by weight of paper with thermoplastic resin.

  The container 10 of the fourth embodiment can achieve the same effects as the container 10 of the second embodiment described above. That is, the container 10 can also be reclosed with respect to the container main body 100, can be disposed of as a paper container, can improve convenience, and can reduce disposal costs. it can.

  6 and 7 are partial cross-sectional views of the container 10 according to the fifth embodiment. That is, FIG. 6A shows a partial cross-sectional view of a configuration in which the annular mouth member 200 and the lid member 30 are combined, and FIG. 6B shows the annular mouth member 200 welded to the container body 100. FIG. 7 shows a partial cross-sectional view of the container 10 in which all members 100, 200, 300 are combined. In all the drawings, the left side of the figure is a cross-sectional view, and the right side of the figure from the dashed line is an external view. Since the container 10 has substantially the same structure as that of the first and second embodiments described above, the same reference numerals are given to components that function in the same manner, and detailed description thereof is omitted.

  The container 10 of Embodiment 5 is characterized by having a lid member 300 (FIG. 7) with a tamper 500. The tamper bears security functions such as falsification prevention and unauthorized tampering recognition. In the present embodiment, a strip-like tamper 500 is employed.

  The lid member 300 is fitted and attached to the outside of the mouth tube 220 of the annular mouth member 200. In other words, the lid member 300 is formed on the outer peripheral surface of the annular fixing member 322 and the outer cylinder 220 that are fitted over the annular first engaging portion 222 on the outer peripheral surface of the annular tube 220 of the annular mouth member 200. The annular fitting convex part 323, the fixed part 322 and the fitting convex part 323 that are fitted over the annular second engaging part 223 spaced apart above the first engaging part 222 are fitted at one end. The connected hinge part 324 and the tamper 500 are integrally provided.

  Thus, from the state of FIG. 7, the top plate 310 having the fitting convex portion 323 can be opened by tearing the tamper 500 along the circumferential direction of the lid member 300. Since the top plate 310 is connected to the fixing portion 322 via the hinge portion 324, it is not completely removed. A claw portion 330 for opening the top plate 310 is provided on the opposite side of the fitting convex portion 323 on the side away from the hinge portion 324.

  Also in the fifth embodiment, the tubular welded portion 230 of the annular mouth member 200 is welded to the inner surface 101 of the upper end opening of the paper tube 110 as in the above-described embodiments. The same effect can be achieved. In addition, since the container 10 according to the fifth embodiment includes the tamper 500 described above in the lid member 300, it is possible to reliably determine that the container 10 has been opened, and to prevent a crime such as mixing foreign matter into the container 10. it can.

  8 and 9 show partial cross-sectional views of the container 10 of the sixth embodiment. FIG. 8A shows a partial cross-sectional view of a configuration in which the annular mouth member 200 and the lid member 30 are combined. FIG. 8B shows a configuration in which the annular mouth member 200 is welded to the container body 100. A partial cross-sectional view is shown, and FIG. 9 shows a partial cross-sectional view of the container 10 in which all members 100, 200, 300 are combined. In all the drawings, the left side of the figure is a cross-sectional view, and the right side of the figure from the dashed line is an external view. Since the container 10 has substantially the same structure as that of the fifth embodiment described above, the same reference numerals are given to components that function in the same manner, and detailed description thereof is omitted.

  The container 10 of the sixth embodiment is greatly different from the fifth embodiment in the structure of the annular mouth member 200. That is, in the sixth embodiment, the flange portion 210 of the annular mouth member 200 is omitted, and the first engaging portion 222 has the function of the flange portion 210. That is, in the sixth embodiment, the upper end of the paper tube 110 is abutted against the lower surface of the first engaging portion 222. For this reason, in the container 10 of the sixth embodiment, the axial height of the annular mouth member 200 can be lowered, and the peripheral wall 320 of the lid member 300 covers the upper end of the paper tube 110 up to the position of the fixing portion 322. .

  Thereby, compared with the container 10 of Embodiment 5, the material of the cover member 300 can be reduced, the weight ratio of plastic can be made lower, and it can respond also to a small container. In addition, it cannot be overemphasized that the effect similar to Embodiment 5 mentioned above can be show | played also in the container 10 of this Embodiment 6. FIG.

  In FIG. 10, the principal part sectional drawing of the container 10 of Embodiment 7 is shown. The container 10 has a structure in which the peripheral wall 320 of the lid member 300 is screwed into the inside of the mouth tube 220 of the annular mouth member 200. Since the other structure is substantially the same as that of the container of the first embodiment described above, the same reference numerals are given to components that function in the same manner, and detailed description thereof is omitted. For comparison, FIG. 11 shows a modification in which the cylindrical welded portion 230 of the annular mouth member 200 of the container 10 of Embodiment 1 is elongated in the axial direction. In this container, as described above, the lid member 30 is screwed onto the outer side of the mouth tube 220 of the annular mouth member 200.

  In the container 10 according to the seventh embodiment shown in FIG. 10, the inner sealing ring 311 is omitted because the peripheral wall 320 is disposed inside the mouth tube 220. In other words, the peripheral wall 320 of the lid member 300 functions as a sealing ring. Therefore, even when compared with the modified example of FIG. 11, the material of the lid member 300 can be reduced by the amount that the inner sealing ring 311 is omitted, which is advantageous in reducing the weight ratio of the plastic material.

  FIGS. 12 and 13 show Embodiments 8 and 9 in which the plastic material of the lid member 300 and the annular mouth member 200 is relatively reduced. The container 10 according to the eighth embodiment shown in FIG. 12 has a thread for screwing the lid member 300 into the annular mouth member 20, a hinge portion connecting the lid member 300 and the annular mouth member 200, and a foreign matter for preventing the contamination. The container 10 of the ninth embodiment shown in FIG. 13 has a hinge part 400 and a claw part 330 added to the container 10 of the eighth embodiment, which has a simple structure in which a tamper and a claw part for opening the lid member 300 are omitted. It has the structure.

  In any of the embodiments, since the annular mouth member 200 is welded to the inner surface 101 of the upper end opening of the paper tube 110 as in the above-described embodiments, the same effects as those of the above-described embodiments can be achieved. . In addition, since the weight ratio of the plastic material to the paper tube 110 can be reduced, it is possible to contribute to the reduction of the container size in addition to the reduction of the material cost.

  On the contrary, FIGS. 14 and 15 show Embodiments 10 and 11 using a relatively large amount of plastic material. The container 10 of the tenth embodiment shown in FIG. 14 includes a hinge portion 324, a tamper 500, a claw portion 330, and the like, and a mouth portion of the annular mouth member 200 on the lower surface side of the top plate 310 of the lid member 300. An annular seal portion 313 that abuts the upper end of the tube 220 is added. Further, the container 10 of the eleventh embodiment shown in FIG. 15 includes two inner sealing rings 311 and 340 in addition to the hinge 400, the thread for screwing, the claw 330, and the like. Yes.

  As described above, when a necessary configuration is added according to the usage form of the container 10, it is conceivable to increase the size of the container 10 in order to suppress the weight ratio of the plastic material to the paper tube 110 to less than 50%. . That is, if the size of the container 10 is increased, a necessary configuration as in the tenth and eleventh embodiments can be added.

  Next, a method for manufacturing the container 10 of each embodiment described above will be described. In the container 10 of each embodiment described above, basically, paper is rolled and the ends are overlapped and bonded together, a bottom member is attached to the bottom of the paper tube 110, and the annular mouth member 200 is attached to the inner surface 101 of the upper end opening. The lid member 300 is assembled to the mouth tube 220 of the annular mouth member 200 by being welded or screwed together. At this time, it becomes a subject to make the adhesion between the paper tube 110 formed of paper and the plastic annular mouth member 200 reliable and strong.

  As a method of welding the inner surface 101 of the upper end opening of the paper tube 110 and the outer peripheral surface 231 of the tubular welded portion 230 of the annular mouth member 200, for example, both the annular mouth member 200 and the paper tube 110 are vibrated using ultrasonic waves. There is a method in which the annular protrusions 232 and 233 are melted by using frictional heat generated between the two. In this method, as shown in FIG. 16, a horn 600 that generates ultrasonic waves is disposed inside the annular mouth member 200, and the paper tube 110 is interposed between the outer peripheral surface 231 of the tubular welded portion 230 of the annular mouth member 200. The receiving jig 700 is arranged across the upper end of the. Then, an ultrasonic wave of about 20 [kHz] is generated through the horn 600 while pressing the upper end of the paper tube 110 and the tubular welded portion 230 of the annular mouth member 200 between the horn 600 and the receiving jig 700.

  Normally, the horn 600 vibrates in the axial direction of the container 10, that is, in the vertical direction (arrow S direction) in the figure, and causes ultrasonic waves to act on the inner surface 101 of the upper end opening of the paper tube 110 via the annular port member 200. At this time, if the bonding surface 800 between the annular mouth member 200 and the paper tube 110 is inclined with respect to the vibration direction of the horn 600 as shown in the figure, ultrasonic waves are effectively applied to the bonding surface 800. be able to. Ideally, the ultrasonic wave works most effectively when the vibration direction of the horn 600 and the adhesive surface 800 are orthogonal to each other. That is, by setting the adhesive surface 800 in a direction slightly intersecting with the vibration direction of the horn 600, frictional heat can be effectively generated on the adhesive surface 800.

  On the other hand, when the bonding surface 800 is set in a direction parallel to the vibration direction of the horn 600, the ultrasonic wave does not effectively act on the bonding surface 800, and the annular protrusions 232 of the annular mouth member 200 that are opposed to each other through the bonding surface 800. 233 and the inner surface 101 of the upper end opening of the paper tube 110 cannot obtain sufficient adhesive strength. For this reason, it is effective to incline the bonding surface 800 with respect to the vibration direction S as in this embodiment.

  In addition, by inclining the bonding surface 800 with respect to the vibration direction S of the horn 600, when the horn 600 is disposed inside the annular mouth member 200, a pressing force is applied between the annular mouth member 200 and the paper tube 110. Can be generated. For this reason, it is possible to press the annular mouth member 200 and the paper tube 110 only by inclining the bonding surface 800, and a complicated mechanism for moving the receiving jig 700 or the horn 600 in a direction to approach each other becomes unnecessary.

  In order to provide an inclination between the vibration direction S of the horn 600 and the adhesive surface 800, it is only necessary to provide the receiving jig 700 with the inclined surface 701 and the horn 600 with the inclined surface 601. Can be handled with slight changes.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above. Furthermore, you may combine the component covering different embodiment suitably.

  For example, in the above-described embodiment, the case where the annular mouth member 200 is welded to the inner surface 101 of the upper end opening portion of the paper container main body 100 has been described. However, the present invention is not limited thereto, and the annular mouth member 200 is disposed outside the paper container main body 100. It may be arranged. Even in this case, it is effective to incline the adhesive surface between the two relative to the axial direction of the paper container main body 100, and the adhesive strength between the two can be sufficiently increased, thereby improving the reliability of the adhesion. Can do. Further, the inclination direction of the adhesive surface 800 with respect to the vibration direction S of the horn 600 may be the reverse direction, and is not limited to the above-described embodiment.

FIG. 1 is a cross-sectional view of a container according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a container according to Embodiment 2 of the present invention. FIG. 3 is a cross-sectional view of a container according to Embodiment 3 of the present invention. FIG. 4 is a cross-sectional view of a container according to Embodiment 4 of the present invention. It is the partial expanded sectional view which expanded the principal part of the container of FIG. FIG. 6A is a partial cross-sectional view illustrating a configuration in which a lid member is combined with the annular mouth member of the container according to the fifth embodiment of the present invention, and FIG. 6B is an attachment of the annular mouth member to the paper container body. FIG. FIG. 7 is a partial cross-sectional view of the container of Embodiment 5 of FIG. FIG. 8A is a partial cross-sectional view showing a configuration in which a lid member is combined with the annular mouth member of the container according to the sixth embodiment of the present invention, and FIG. 8B is an attachment of the annular mouth member to the paper container body. FIG. FIG. 9 is a partial cross-sectional view of the container of the sixth embodiment shown in FIG. FIG. 10 is a partial cross-sectional view of a container according to Embodiment 7 of the present invention. FIG. 11 is a partial cross-sectional view showing a modification of the container according to Embodiment 1 of FIG. FIG. 12 is a partial cross-sectional view of a container according to Embodiment 8 of the present invention. FIG. 13 is a partial cross-sectional view of a container according to Embodiment 9 of the present invention. FIG. 14 is a partial cross-sectional view of a container according to Embodiment 10 of the present invention. FIG. 15 is a partial cross-sectional view of a container according to Embodiment 11 of the present invention. FIG. 16 is an explanatory diagram for explaining a method of welding the paper tube and the annular mouth member of the container according to each embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Container, 100 ... Paper container main body, 101 ... Upper end opening inner surface, 110 ... Paper tube, 200 ... Annular mouth member, 230 ... Cylindrical welding part, 231 ... Outer peripheral surface, 232, 233 ... Annular protrusion, 300 ... Lid Member, 600 ... horn, 700 ... receiving jig, 800 ... bonding surface.

Claims (13)

  The container body includes a paper tube having a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins on the inner surface, and the inner surface of the upper end opening of the paper tube is injection-molded with the thermoplastic resin. A container characterized in that an annular mouth member is welded, and a lid member is engaged with the annular mouth member and attached to allow reclosing.   The container according to claim 1, wherein the lid member is formed by injection molding of a thermoplastic resin.   The container body includes a paper tube having a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins on the inner surface, and a lid member is connected to the upper surface of the upper end opening of the paper tube. A container characterized in that an annular mouth member injection-molded with a thermoplastic resin that is integrally connected with each other is welded to enable reclosing.   The container body is a paper cup having an inner surface with a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins, and an annular mouth that is injection-molded with a thermoplastic resin on the inner surface of the upper end opening of the paper cup A container characterized in that a member is welded and a lid member is attached to the annular mouth member to enable reclosing.   The container according to claim 4, wherein the lid member is formed by injection molding of a thermoplastic resin.   The container body is a paper cup that has a weld layer made of a thermoplastic resin that is resistant to contents and can be welded to other thermoplastic resins on the inner surface, and a lid member is integrally connected to the inner surface of the upper end opening of the paper cup at the upper part. A container characterized in that an annular mouth member injection-molded with a plastic resin connected to the inside is welded to enable reclosing.   The annular mouth member has an annular flange portion that comes into contact with the upper end opening of the paper container body, and a mouth tube having an engaging portion with the lid member on the outer periphery is erected on the upper surface of the flange portion. The container according to any one of claims 1 to 6, wherein a cylindrical welded portion having an outer peripheral surface welded to the inner surface of the upper end opening is suspended from the lower surface of the flange portion.   The container according to claim 7, wherein an outer peripheral surface of the cylindrical welded portion is inclined downward and inward.   A plurality of annular projections that melt and function as adhesives are spaced apart from each other on the outer peripheral surface of the cylindrical welded portion, and are integrally projected from the outer peripheral surface. The container according to 8.   The surface shape of the annular protrusion is curved or sharpened so as to reduce a surface in contact with the inner surface of the upper end opening of the paper container main body before melting. Container.   The adhesive surface between the outer peripheral surface of the cylindrical welded portion and the inner surface of the upper end opening of the paper container body is inclined with respect to the axial direction of the paper container body. Item 11. The container according to any one of Items 10.   6. The container according to claim 2, wherein the annular mouth member and / or the lid member are injection-molded with a molding material obtained by mixing more than 50% by weight of paper with thermoplastic resin.   The container according to claim 3 or 6, wherein the lid member, the joint portion, and the annular mouth member are integrally injection-molded with a molding material in which waste paper is mixed in an amount of more than 50% by weight in a thermoplastic resin.

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