cap

Abstract

To provide a cap with which necessary and sufficient opening area can be secured for smooth air replacement without weakening de-energizing effect, occurrence of weld lines around the air exchange hole during injection molding can be suppressed.SOLUTION: A discharge cylinder 7 has a cylindrical part 73 consisting of an outer region 71 extending outward from the container and an inner region 72 extending inward from the container with the discharge cylinder support part 61 as the boundary in the axial direction of a cap body 4, a bottom end part 74 forming a rear end surface of the inner region 72 and a discharging port 75 opening on the bottom end part 74, a flow rate adjustment part 9 has multiple air replacement holes 94 formed around the discharging port 75 along the axis of the cap body 4 in the inner region 72 of the discharge cylinder 7 and a rib 96 that divides the opening holes 95 of the air replacement holes 94 into multiple parts in the circumferential direction of the discharge cylinder 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cap that is attached to a container, and relates to a technology for reducing the force of a liquid flow during pouring and suppressing the occurrence of weld lines during injection molding. [Background technology]

[0002] Conventionally, one example of this type of cap is described in Patent Document 1. This cap has a cap body that includes an attachment part that is attached to the mouth of a container by fitting or via screws, an inner lid wall that extends inward from the upper inner periphery of the attachment part and closes the mouth of the container, a pouring nozzle that stands from the periphery of a pouring outlet that penetrates roughly the center of the inner lid wall, and a buffer mechanism that is provided below the pouring outlet (in the internal space of the mouth of the container).

[0003] The buffer mechanism, which reduces the force of the liquid contents when the container is tilted to dispense the liquid, has an annular side wall that hangs down from the periphery of the spout and a bottom plate that closes the lower end of the side wall. The side wall has a plurality of slit-like openings formed at intervals around the periphery to allow the liquid contents to pass when the container is tilted, and the openings also function as air displacement holes when the container is tilted to dispense the liquid contents. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2019-189324 Summary of the Invention [Problem to be solved by the invention]

[0005] In the buffer mechanism described above, the flow of the liquid contents is reduced by the resistance of the bottom plate below the outlet, and is further reduced by the flow direction being changed from the axial direction of the container to the radial direction when the liquid enters the outlet nozzle through an opening in the annular side wall that hangs down from the inner lid wall.

[0006] However, when the liquid content flows from the outlet into the nozzle, it first flows in the axial direction of the container and then flows along the inner surface of the nozzle, which is parallel to the axial direction of the container, making it difficult to sufficiently reduce the energy of the flow of the liquid content.

[0007] Furthermore, since the opening in the side wall is slit-shaped, in order to ensure that the opening area in the side wall is large enough to pour out the contents and replace the air, the slit must be formed long in the axial direction of the container, which results in a larger distance between the pouring outlet and the bottom plate and a weaker energy dissipation effect.

[0008] The present invention solves the above-mentioned problems and aims to provide a cap that can ensure a sufficient opening area for smooth air replacement without weakening the energy dissipation effect, and that can suppress the occurrence of weld lines around the air replacement hole during injection molding. [Means for solving the problem]

[0009] In order to achieve the above object, the cap according to the present invention has a cap body that is attached to the mouth of a container, and the cap body is formed by integrally molding a main body portion that surrounds the mouth of the container around the axis of the container, a pouring tube provided within the main body portion, and a flow rate adjusting portion that is provided within the pouring tube, and the main body portion has a pouring tube support portion that is connected to the outer peripheral surface of the pouring tube and divides the inside of the main body portion into an outer region and an inner region, and the pouring tube has a tubular portion made up of an outer region that extends outward from the container and an inner region that extends inward from the container, with the pouring tube support portion as the boundary in the axial direction of the cap body, a bottom end portion that forms the inner end face of the inner region, and a pouring outlet that opens at the bottom end, the flow rate adjusting section comprises an energy dissipation plate disposed in front of the spout in the axial direction of the container, a plurality of support ribs extending from the periphery of the spout to the front of the spout in the axial direction of the container to hold the energy dissipation plate, a plurality of openings formed between the support ribs, and a plurality of air replacement holes formed in an inner region of the tubular section at positions spaced apart in the radial direction of the spouting tube from the openings between the support ribs; Air displacement holes are In the inner area of the cylindrical part Along the axis of the cap body Multiple support ribs Around Formation of air displacement holes The pouring tube is characterized by having a rib that divides the opening into multiple parts in the circumferential direction of the pouring tube.

[0011] In the cap according to the present invention, The ribs of the air displacement holes areThe air replacement hole is arranged at a specific position, and the specific position corresponds to the position where the molten resin that flows from the cavity at the bottom end of the pouring tube to the cavity of the cylindrical portion during injection molding bypasses the mold portion corresponding to the air replacement hole and becomes a diverged stream, and the diverged streams of the molten resin join within the cavity of the cylindrical portion. [Effects of the Invention]

[0012] As described above, with the cap according to the present invention, when the container is tilted, the liquid contents flow into the inner region of the pouring tube from the pouring outlet at the bottom end of the pouring tube, pass through the outer region of the pouring tube, and flow out of the cap through the opening of the pouring tube.

[0013] Meanwhile, the outside air flowing into the outer region of the dispensing tube from the opening of the dispensing tube above the liquid surface in the dispensing tube flows into the inner region of the dispensing tube, and flows into the container through the air replacement hole located above the liquid surface in the flow rate adjustment section, allowing the content liquid to be smoothly dispensed by air replacement between the content liquid and the outside air.

[0014] Therefore, in a structure in which a flow rate adjuster is provided inside the pouring tube, the opening area of the air replacement hole can be reduced by providing the pouring outlet for liquid passage and the air replacement hole for ventilation as separate elements in the pouring tube. In other words, a conventional structure in which only an air replacement hole is provided and the air replacement hole performs the dual functions of liquid passage and ventilation is prone to increasing the opening area of the air replacement hole. However, by providing the pouring outlet for liquid passage and the air replacement hole for ventilation as separate elements, the air replacement hole can be designed solely for the purpose of air replacement, making it possible to reduce the number of air replacement holes and their opening area.

[0015] Reducing the number of air displacement holes and their opening area reduces the cause of weld lines, which occur when molten resin bypasses the mold parts corresponding to the air displacement holes and then joins together during injection molding.

[0016] Furthermore, by providing a rib that divides the opening of the air replacement hole into multiple sections circumferentially around the pouring tube, the molten resin flows through the cavity of the rib in the mold during injection molding. As a result, the molten resin that has flowed out of the cavity of the rib flows into the meeting point where the molten resin that has bypassed the mold portion of the air replacement hole flows in opposing directions and meets, pushing the meeting point in the direction of the molten resin flow. This reduces the meeting angle when the molten resin meets at the meeting point, smoothing the merging of the molten resin, suppressing the occurrence of weld lines and reducing the depth of the weld groove. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a cross-sectional view of a cap according to an embodiment of the present invention in an open state; [Figure 2] FIG. 10 is a cross-sectional view of the cap according to the embodiment in a closed state. [Figure 3] FIG. 10 is a top perspective view of the cap according to the embodiment in an open state. [Figure 4] FIG. 10 is a plan view of the cap according to the embodiment in an open state; [Figure 5] FIG. 10 is a bottom perspective view of the cap according to the embodiment in an open state. [Figure 6] FIG. 10 is a side view of the cap according to the embodiment in an open state. [Figure 7] FIG. 10 is a side view of the cap in the closed state according to the embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of a cap according to the present invention will be described with reference to the drawings. As shown in Figures 1 to 7, cap 1 has cap body 4 that is attached to the mouth 3 of container 2, and upper lid 6 that is integrated with cap body 4 via hinge 5 and band 5a and opens and closes around the hinge. Cap 1 is made entirely of resin.

[0019] The cap body 4 is integrally molded from a main body portion 41 that surrounds the mouth 3 of the container 2 around the axis of the container 2, a dispensing tube 7 provided inside the main body portion 41, an inner seal portion 8 that is inserted into the mouth 3 of the container 2, and a flow rate adjustment portion 9 provided inside the dispensing tube 7, and a fitting groove 10 is formed between the inner seal portion 8 and the main body portion 41.

[0020] The main body portion 41 has a cap inner convex portion 12 that fits into a container outer recess 11 formed on the outer periphery of the mouth of the container 2, and a pouring tube support portion 61 that is connected to the outer surface of the pouring tube 7 and divides the inside of the main body portion 41 into an outer region and an inner region.

[0021] The dispensing tube 7 has a tubular portion 73 consisting of an outer region 71 extending toward the outside of the container and an inner region 72 extending toward the inside of the container in the axial direction of the cap body 4, with the dispensing tube support portion 61 as the boundary, a bottom end portion 74 forming the inner end face of the inner region 72, and a dispensing outlet 75 opening at the bottom end portion 74.

[0022] The flow rate adjusting section 9 comprises an energy dissipation plate 91 arranged in front of the spout 75 in the axial direction of the container 2, a plurality of support ribs 92 extending from around the spout 75 to in front of the spout 75 in the axial direction of the container 2 and holding the energy dissipation plate 91, a plurality of openings 93 formed between the support ribs 92, and an air replacement hole 94 formed in the inner region 72 of the spout tube 7.

[0023] The air replacement holes 94 are formed at multiple locations around the spout 75, circumferentially around the axis of the cap body 4. The relative positions of the air replacement holes 94 and the openings 93 can be set arbitrarily, but in this case, each air replacement hole 94 faces the openings 93 between the support ribs 92 in the radial direction of the spouting tube 7, allowing for efficient air replacement during pouring.

[0024] Each air replacement hole 94 opens from the bottom end 74 to the inner region 72 of the pouring tube 7, and has ribs 96 that divide the rectangular opening 95 of the air replacement hole 94 into multiple parts in the circumferential direction of the pouring tube 7, and the ribs 96 bridge between the opening edges of opposing openings 95 in the axial direction of the pouring tube 7.

[0025] The rib 96 is positioned at a specific position of the air replacement hole 94, and this specific position corresponds to the meeting point where the molten resin flowing from the cavity at the bottom end 74 of the pouring tube 7 to the cavity of the tubular portion 73 during injection molding bypasses the mold portion corresponding to the air replacement hole 94 and becomes a diverged stream, and the diverged streams of molten resin meet within the cavity of the tubular portion 73.

[0026] Furthermore, the cap 1 has a cylindrical outer shell 13 that forms a double wall with the cap body 4. It has a slit 14 that separates the cap body 4 and the outer shell 13, and is equipped with a thin-walled inner / outer connecting part 16 that connects the cap body 4 and the outer shell 13.

[0027] The inside plug 18 that closes the opening of the dispensing tube 7 is separate from the top lid 6 and the cap body 4 before the top lid 6 is folded at the hinge 5. With the inside plug 18 placed in the opening of the dispensing tube 7, the top lid 6 is folded at the hinge 5 to incorporate the inside plug 18 into the top lid 6.

[0028] The top cover 6 has a cylindrical inside plug holder 19 that holds the inside plug 18, and has a fitting projection 20 that is annular along the inner peripheral edge of the top cover 6 and protrudes radially inward.

[0029] The cap body 4 has an annular upper lid holding portion 21 along its outer periphery, and the upper lid holding portion 21 has a shape that expands diagonally upward radially outward of the cap body 4. The upper lid holding portion 21 has a fitting surface 22 whose outer periphery is recessed in an arc shape, and the fitting surface 22 fits into the fitting protrusion 20 of the upper lid portion 6.

[0030] The top lid 6 has a locking portion 23 at a position facing the hinge 5 in the radial direction of the mouth 3 of the container 2, and the locking portion 23 is connected to the top lid 6 via a locking portion score 24. The cap body 4 has a stopper portion 25 that engages with a locking claw 23a formed on the locking portion 23 to prevent the top lid 6 from opening, and the outer shell 13 has a guard portion 26 that surrounds the locking claw 23a and the stopper portion 25.

[0031] The operation of the above configuration will be described below. Before the top lid part 6 is folded, the inside plug 18 is placed in the opening of the dispensing tube 7, and the top lid part 6 is folded at the hinge 5 to incorporate the inside plug 18 into the top lid part 6.

[0032] As shown in Figure 1, when top lid portion 6 is folded, inner plug holding portion 19 embraces inner plug 18, and fitting protrusion 20 of top lid portion 6 fits into top lid holding portion 21 of cap body 4. In addition, locking portion 23 of top lid portion 6 enters guard portion 26, and locking claw 23a engages with stopper portion 25. (Corning) By providing a thin-walled inner / outer connecting portion 16 that connects the cap body 4 and the outer shell portion 13, the lower end of the cap body 4 is not constrained by other members.

[0033] Therefore, when the cap inner convex portion 12 slides on the outer surface of the mouth 3 of the container 2 in the axial direction of the mouth 3 and moves radially of the mouth 3 in accordance with the shape of the outer surface of the mouth 3 of the container 2 during stoppering, the lower part of the cap body 4, which is connected to the outer shell portion 13 by the thin-walled inner / outer connecting portion 16, easily expands radially without its opening being restricted by other components, allowing the stoppering operation to be carried out smoothly and reducing the force required for stoppering. (TE) When opening, the locking claw 23a engages with the stopper 25, pushing up the top lid 6 and breaking the locking score 24 of the locking part 23. Therefore, when the container 2 is on a display shelf or the like, the state in which the locking part 23 is separated from the top lid 6 indicates that the container has been tampered with, and the locking part 23 is held in the holding space 27, improving TE resistance.

[0034] Since the outer shell 13 protects the cap body 4, it is not possible to apply force directly to the cap body 4 using a tool such as a bottle opener to remove the cap 1 from the mouth 3 of the container 2. (When pouring) When the container 2 is tilted, the liquid content flows out from the outlet 75 at the bottom end 74 of the dispensing tube 7 in the axial direction of the dispensing tube 7 inside the container 2 and flows into the inner region 72 of the dispensing tube 7. At this time, the energy dissipation plate 91 acts as a resistance to suppress the flow of the liquid content and control the flow rate.

[0035] The content liquid whose flow is stopped by the energy dissipation plate 91 is redirected in the radial direction of the dispensing tube 7, passes through the opening 93 between the support ribs 92, hits the wall surface of the inner region 72 of the dispensing tube 7, passes through the outer region 71 of the dispensing tube 7, and flows out of the cap from the opening of the dispensing tube 7.

[0036] Meanwhile, the outside air flowing into the outer region 71 of the dispensing tube 7 from the opening of the dispensing tube 7 above the liquid surface inside the dispensing tube 7 flows into the inner region 72 of the dispensing tube 7, and flows into the inside of the container 2 through the air replacement hole 94 located above the liquid surface of the flow rate adjustment section 9, and the content liquid is smoothly dispensed by air replacement between the content liquid and the outside air.

[0037] Therefore, in a structure in which a flow rate adjustment section 9 is provided inside the dispensing tube 7, the opening area of the air replacement hole 94 can be reduced by providing the dispensing outlet 75 for liquid passage and the air replacement hole 94 for ventilation as independent elements in the dispensing tube 7.

[0038] That is, the conventional structure in which only the air replacement hole 94 is provided and the air replacement hole 94 has the dual functions of passing liquid and venting has the problem of increasing the opening area of the air replacement hole 94.

[0039] However, by providing the liquid outlet 75 and the air replacement hole 94 for ventilation as separate elements, the air replacement hole 94 can be designed solely for the purpose of air replacement, making it possible to reduce the number of air replacement holes 94 installed and their opening area.

[0040] Reducing the number of air replacement holes 94 and the opening area thereof reduces the cause of weld lines that occur when molten resin bypasses the mold parts corresponding to the air replacement holes 94 during injection molding and then joins together.

[0041] Furthermore, in this embodiment, molten resin flows into the cavity of the energy dissipation plate 91 from the filling gate corresponding to the gate mark 100 left on the top surface of the energy dissipation plate 91 during injection molding, passes through the cavity of the support rib 92, flows into the cavity of the bottom end 74, and then flows into the cavity of the pouring tube 7.

[0042] The molten resin that flows into the cavity of the pouring tube bypasses the area of the mold that corresponds to the air displacement hole 94, then flows in opposing directions to meet and flow from the inner region to the outer region. Weld lines are likely to form where the molten resins meet, and if a weld line forms above the air displacement hole 94 of the pouring tube 7 (≒ outer region), that is, on the inner circumferential surface of the pouring tube 7 that abuts against the inside plug 18 and provides a sealing function, it can cause leakage.

[0043] However, in this embodiment, ribs 96 are provided that divide the opening 95 of the air replacement hole 94 into multiple sections in the circumferential direction of the dispensing tube 7, so that the molten resin flows through the cavities corresponding to the ribs 96. The molten resin flowing through the cavities of these ribs 96 meets at a meeting position with the molten resin that has detoured around the mold portion corresponding to the air replacement hole 94, and the meeting position of the molten resin is pushed out in the direction of the flow of the molten resin. As a result, the meeting angle when the molten resins meet at the meeting position becomes shallower, the molten resins meet smoothly, the occurrence of weld lines is suppressed, and the depth of the weld groove can be reduced. [Explanation of symbols]

[0044] 1 cap 2 containers 3 Mouth 4 Cap body 5 Hinge 5a band 6 Top lid 7 Pour tube 8 Inner seal 9 Flow rate adjustment section 10. Fitting groove 11. Container outer recess 12 Cap inner convex part 13 Outer wall 14 Slit 16 Internal and external connection 18 Inner stopper 19 Inner stopper holding part 20 Fitting protrusion 21 Top lid holder 22 Mating surface 23 Rock Club 23a locking claw 24 Rock Club Score 25 Stopper part 26 Guard section 41 Main body 61 Spout tube support part 71 Outer area 72 Inner Area 73 Cylindrical part 74 Bottom end 75 Spout 91 Energy reducing plate 92 Support rib 93 Aperture 94 Air Displacement Vent 95 Open hole 96 Ribs 100 Gate Marks

Claims

1. A cap body is attached to the opening of the container, The cap body is formed by integrally molding a main body portion that surrounds the mouth of the container around the axis of the container, a pouring tube provided in the main body portion, and a flow rate adjusting portion provided in the pouring tube, the main body portion has a pouring tube support portion that is connected to the outer peripheral surface of the pouring tube and divides the inside of the main body portion into an outer region and an inner region; the pouring tube has a cylindrical portion including an outer region extending outward from the container and an inner region extending inward from the container, with the pouring tube support portion as a boundary in the axial direction of the cap body, a bottom end portion forming the inner end face of the inner region, and a pouring outlet opening at the bottom end portion; the flow rate adjusting section comprises an energy dissipation plate disposed in front of the spout in the axial direction of the container, a plurality of support ribs extending from the periphery of the spout to the front of the spout in the axial direction of the container to hold the energy dissipation plate, a plurality of openings formed between the support ribs, and a plurality of air replacement holes formed in an inner region of the tubular section at positions spaced apart in the radial direction of the spouting tube from the openings between the support ribs; A cap characterized in that the air replacement hole is formed around a plurality of support ribs in the inner region of the cylindrical portion along the axis of the cap body, and has ribs that divide the opening of the air replacement hole into multiple sections in the circumferential direction of the pouring tube.

2. A cap as described in claim 1, characterized in that the rib of the air replacement hole is arranged at a specific position of the air replacement hole, and said specific position corresponds to the position where the molten resin flowing from the cavity at the bottom end of the injection tube to the cavity of the tubular part during injection molding bypasses the mold part corresponding to the air replacement hole and becomes a diverged stream, and the diverged streams of molten resin join within the cavity of the tubular part.

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