Synthetic resin container lid

Abstract

To provide a novel synthetic resin container lid by which a content is prevented from adhering to an upper surface wall 14 as much as possible.SOLUTION: In plan view in an upper end part of an inner peripheral surface of a suspended wall 26 and / or a lower end part of an outer peripheral surface of seal means 36, a notch 48 is formed on the opposite side to a side where hinge means 8 is provided.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a synthetic resin container lid. [Background technology]

[0002] An example of a synthetic resin container lid for use in a container containing a relatively viscous liquid such as edible oil is disclosed in Patent Document 1 below. This container lid includes a lid body and a top cover connected to the lid body via hinge means and rotatable between a closed position that covers the top surface of the lid body and an open position that exposes the top surface of the lid body. The lid body includes a cylindrical mounting wall, and an annular top wall extending radially inward from the inner circumferential surface of the mounting wall, a discharge tube extending upward from the upper surface of the top wall, an annular connecting wall extending radially inward from the inner circumferential surface of the discharge tube, a cylindrical hanging wall hanging downward from the inner circumferential edge of the connecting wall, and a bottom wall extending radially inside the hanging wall, each with a communicating opening formed in the bottom wall. The top lid includes a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a sealing means extending continuously in the circumferential direction is provided on the underside of the top wall. When the top lid is pivoted toward the closed position, the outer surface of the sealing means provided on the top lid tightly contacts the inner surface of the depending wall provided on the lid body, and then tightly contacts the inner surface of the discharge tube, thereby closing the communication opening formed in the bottom wall. To discharge liquid contents from a container equipped with the container lid, the top lid is positioned in the open position and the container is then tilted appropriately. In this way, the contents pass through the communication opening, then travel along the upper surface of the bottom wall, the inner surface of the depending wall, the upper surface of the connecting wall, and the inner surface of the discharge tube, in that order, before being discharged from the upper edge of the discharge tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-55008 Summary of the Invention [Problem to be solved by the invention]

[0004] It has been found that with the synthetic resin container lid disclosed in Patent Document 1, if the lid is repeatedly used, that is, if the lid is repeatedly rotated from the closed position to the open position to discharge the contents and then rotated from the open position to the closed position, the contents tend to adhere to the top wall. This is undesirable from the standpoints of hygiene and aesthetics.

[0005] The inventors have considered the cause of the contents adhering to the upper wall as follows: Because the connecting wall extends radially inward from the inner peripheral surface of the discharge tube, there is a significant possibility that the contents may remain on the upper surface of the connecting wall even after the contents have been discharged. Furthermore, when the top cover is rotated toward the closed position, the outer peripheral surface of the sealing means provided on the top cover comes into close contact with the inner peripheral surface of the hanging wall located radially inward before coming into close contact with the inner peripheral surface of the discharge tube located radially outward. Therefore, in the final stage of the rotational closing movement, even though the outer peripheral surface of the sealing means and the inner peripheral surface of the hanging wall are in close contact over the entire circumferential direction, a gap is formed between the outer peripheral surface of the sealing means and the inner peripheral surface of the discharge tube. In a plan view, this gap is formed on the side opposite to the side where the hinge means is provided, and it gradually narrows as the rotational closing movement progresses. Therefore, in the final stage of the above-mentioned pivotal closing movement, the pressure in the closed space surrounded on three sides by the upper surface of the connecting wall, the outer surface of the sealing means, and the inner surface of the discharge tube rises rapidly, and the contents remaining on the upper surface of the connecting wall fly outward and upward in the radial direction through the above-mentioned gap, and fall after or without adhering to the underside of the top wall, and then adhere to the top wall.

[0006] The present invention was made in consideration of the above facts, and its main technical objective is to provide a new and improved synthetic resin container lid that prevents the contents from adhering to the top wall as much as possible. [Means for solving the problem]

[0007] After extensive research, the inventors have discovered that the above-mentioned main technical problem can be solved by forming a notch on the upper end of the inner surface of the hanging wall and / or the lower end of the outer surface of the sealing means, on the side opposite to the side on which the hinge means is provided, when viewed in a plane.

[0008] That is, according to the present invention, a synthetic resin container lid that solves the above-mentioned main technical problem comprises a lid body, and a top lid that is connected to the lid body via hinge means and can be rotated between a closed position that covers the top surface of the lid body and an open position that exposes the top surface of the lid body, The lid main body includes a cylindrical mounting wall, an annular upper wall extending radially inward from the inner peripheral surface of the mounting wall, a discharge tube extending upward from the upper surface of the upper wall, an annular connecting wall extending radially inward from the inner peripheral surface of the discharge tube, a cylindrical hanging wall hanging downward from the inner peripheral edge from the lower surface of the connecting wall, and a bottom wall extending radially inside the hanging wall, and a communication opening is formed in the bottom wall, the top cover includes a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a sealing means is provided on the lower surface of the top wall and extends continuously in the circumferential direction; When the top lid is rotated toward the closed position, the outer peripheral surface of the sealing means provided on the top lid tightly contacts the inner peripheral surface of the hanging wall provided on the lid body and then tightly contacts the inner peripheral surface of the discharge tube, The synthetic resin container lid is characterized in that a notch is formed in the upper end of the inner peripheral surface of the hanging wall and / or the lower end of the outer peripheral surface of the sealing means.

[0009] Preferably, the notch is formed on the side opposite to the side where the hinge means is provided in a plan view. The sealing means is preferably composed of a cylindrical inner sealing wall that is relatively long in the vertical direction and a cylindrical outer sealing wall that is relatively short. The sealing means may be composed of a single cylindrical wall having a tip end with a relatively small outer diameter and a base end with a relatively large outer diameter. [Effects of the Invention]

[0010] In the synthetic resin container lid of the present invention, a notch is formed in the upper end of the inner peripheral surface of the hanging wall and / or the lower end of the outer peripheral surface of the sealing means. Therefore, even if the top lid is rotated toward the closed position and the outer peripheral surface of the sealing means comes into close contact with the inner peripheral surface of the hanging wall and then the inner peripheral surface of the discharge tube, air in the closed space surrounded on three sides by the upper surface of the connecting wall, the outer peripheral surface of the sealing means, and the inner peripheral surface of the discharge tube can move into the container through the notch, thereby preventing an increase in pressure in the closed space. Therefore, with the synthetic resin container lid of the present invention, even if contents remain on the upper surface of the connecting wall, the remaining contents are minimized from flying outward and upward in the radial direction when the top lid is rotated toward the closed position, thereby preventing the contents from adhering to the top wall. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a plan view of a preferred embodiment of a synthetic resin container lid constructed in accordance with the present invention, with the top lid in an open position; [Figure 2] FIG. 2 is a central vertical cross-sectional view of the container lid shown in FIG. [Figure 3] 2 is a central vertical cross-sectional view of the container lid shown in FIG. 1 when the top cover is at a required intermediate opening position between the open position and the closed position. [Figure 4] 2 is a central vertical cross-sectional view of the container lid shown in FIG. 1 when the top lid is in a closed position. [Figure 5] 10 is a central vertical cross-sectional view of another embodiment of a synthetic resin container lid configured according to the present invention, with the top lid in a closed position. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in more detail with reference to the accompanying drawings showing preferred embodiments of a synthetic resin container lid constructed according to the present invention.

[0013] 1 and 2, a container lid generally designated by the numeral 2 comprises a lid body 4 and a top lid 6. The top lid 6 is connected to the lid body 4 via hinge means 8 and can freely pivot between a closed position (as shown in FIG. 4) in which it covers the top surface of the lid body 4 and an open position (as shown in FIG. 1) in which it exposes the top surface of the lid body 4. Such a container lid 2 is integrally formed by compression molding or injection molding an appropriate synthetic resin.

[0014] The lid body 4 includes a cylindrical mounting wall 10. A locking rib 12 protruding radially inward is formed at the lower end of the inner circumferential surface of the mounting wall 10. A ring-shaped top wall 14 extending radially inward is provided at the upper end of the inner circumferential surface of the mounting wall 10. A cylindrical seal piece 16 is formed downwardly on the lower surface of the top wall 14. A ring-shaped locking wall 18 extending upward is formed on the upper surface of the top wall 14. A ring-shaped locking rib 20 protruding radially outward is formed at the upper end of the outer circumferential surface of the locking wall 18. An upwardly extending discharge tube 22 is provided on the inner peripheral edge of the upper surface of the top wall 14. The discharge tube 22 is cylindrical except for its upper end, which is curled radially outward. A ring-shaped connecting wall 24 extending radially inward is provided at the vertical middle portion of the inner circumferential surface of the discharge tube 22. A cylindrical hanging wall 26 is provided on the lower surface of connecting wall 24, hanging downward from the inner peripheral edge. A cylindrical gap space exists between the outer peripheral surface of hanging wall 26 and the inner peripheral surface of discharge tube 22. A circular bottom wall 28 extending in the radial direction is provided on the inside of the lower end of hanging wall 26. Bottom wall 28 is located below top wall 14 when viewed in the vertical direction, and bottom wall 28 has communication openings 30 formed therethrough in the vertical direction. As can be clearly understood by referring to FIG. 1 , four communication openings 30 are generally fan-shaped, and are formed at equal angular intervals in the circumferential direction.

[0015] The top cover 6 includes a circular top wall 32 and a cylindrical skirt wall 34 that hangs down from the outer periphery of the top wall 32. The lower end of the outer periphery of the skirt wall 34 is connected to the upper end of the outer periphery of the mounting wall 10 of the cover body 4 via a hinge 8. A sealing means 36 is provided on the lower surface of the top wall 32, extending continuously in the circumferential direction. In the illustrated embodiment, the sealing means 36 is composed of a cylindrical inner sealing wall 38 that is relatively long in the vertical direction and a cylindrical outer sealing wall 40 that is relatively short. A ring-shaped engagement ridge 42 that protrudes radially inward is formed at the lower end of the inner periphery of the skirt wall 34. A ring-shaped abutment shoulder surface 44 that faces downward above the engagement ridge 42 is further formed on the inner periphery of the skirt wall 34. A flange 46 that protrudes radially outward is formed at the lower end of the outer periphery of the skirt wall 34, on the side opposite the side where the hinge 8 is provided, in a plan view. A user can easily swing the top cover 6 relative to the cover body 4 to open or close it by hooking his / her finger on the flange 46 .

[0016] Here, it is important that in a synthetic resin container lid constructed according to the present invention, a notch 48 is formed in the upper end of the inner circumferential surface of the hanging wall 26 and / or the lower end of the outer circumferential surface of the sealing means 36. In the illustrated embodiment, the notch 48 is formed on the side opposite to the side on which the hinge means 8 is provided in a plan view. Although the notch 48 is formed only in the upper end of the inner circumferential surface of the hanging wall 26, it may also be formed in the lower end of the outer circumferential surface of the inner sealing wall 38 or in both this and the upper end of the inner circumferential surface of the hanging wall 26.

[0017] Next, the process of pivoting the top cover 6 from the open position to the closed position will be described with reference to Figures 2 to 4. Figure 2 shows the top cover 6 in the open position. When the top cover 6 is pivoted from the open position to the closed position, the outer peripheral surface of the sealing means 36 provided on the top cover 6 comes into close contact with the inner peripheral surface of the hanging wall 26 provided on the cover body 4, and then comes into close contact with the inner peripheral surface of the discharge tube 22. In the illustrated embodiment, the sealing means 36 is composed of the inner sealing wall 38 and the outer sealing wall 40. Therefore, the outer peripheral surface of the inner sealing wall 38, which is relatively long in the vertical direction, comes into close contact with the inner peripheral surface of the hanging wall 26, and then, while maintaining this close contact, the outer peripheral surface of the relatively short outer sealing wall 40 comes into close contact with the inner peripheral surface of the discharge tube 22. Furthermore, because the top cover 6 pivots about the hinge means 8, during the pivoting closing movement, the outer peripheral surfaces of the inner seal wall 38 and the outer seal wall 40 are successively brought into tight contact with the inner peripheral surface of the hanging wall 26 and the inner peripheral surface of the discharge tube 22, respectively, in a plan view from the side where the hinge means 8 is provided toward the opposite side. Figure 3 shows a state in which, in a plan view, the lower end of the outer peripheral surface of the inner seal wall 38 on the side opposite the side where the hinge means 8 is provided abuts or is brought into tight contact with the upper end of the inner peripheral surface of the hanging wall 26. In this state, as shown in the enlarged view of portion X in Figure 3, a gap G remains between the outer seal wall 40 and the discharge tube 22 on the side opposite the side where the hinge means 8 is provided. When the top cover 6 is further pivoted closed from the state shown in Figure 3, the engaging ribs 42 of the top cover 6 elastically move downward over the engaging ribs 20 of the cover body 4, and the abutment shoulder surfaces 44 abut against the upper surfaces of the engaging walls 18, thereby holding the top cover 6 in the closed position. Figure 4 shows the state in which the top cover 6 is held in the closed position. When the top cover 6 is held in the closed position, the outer peripheral surface of the inner sealing wall 38 is in close contact with the inner peripheral surface of the hanging wall 26 over the entire circumferential direction except for the portions where the notches 48 are formed, and the outer peripheral surface of the outer sealing wall 40 is in close contact with the inner peripheral surface of the discharge tube 22 over the entire circumferential direction. Therefore, the gap G is eliminated.

[0018] 2 shows, by a two-dot chain line, a container lid 2 constructed according to the present invention as well as the neck of a container to which the container lid 2 is applied. The neck 100 of the container, which can be formed from an appropriate synthetic resin or glass, is cylindrical with an open top, and has a locking ridge 102 formed at the upper end of its outer periphery. The outer periphery of the neck 100 also has a support ring 104 (used when transporting the container) located below the locking ridge 102.

[0019] When the container lid 2 is attached to the mouth and neck portion 100 to seal the mouth and neck portion 100 after the contents have been placed in the container, the container lid 2, more specifically, the container lid 2 with the top lid 6 in the closed position relative to the lid body 4, is fitted onto the mouth and neck portion 100 and forced downward, elastically deforming the mounting wall 10 of the lid body 4 so that the locking ridges 12 formed on the inner peripheral surface of the mounting wall 10 are locked below the locked ridges 102 of the mouth and neck portion 100. In this way, the outer peripheral surface of the seal piece 16 of the lid body 4 is brought into close contact with the upper end of the inner peripheral surface of the mouth and neck portion 100.

[0020] When the contents of the container are consumed, a finger is placed under the flange 46 of the top lid 6 and an upward force is applied to the flange 46 around the hinge means 8. This upward force causes the engaging projection 42 to resiliently overcome the engaging projection 20, causing the top lid 6 to pivot from the closed position toward the open position, i.e., to pivot open. After the top lid 6 is positioned in the open position, the container is tilted appropriately. In this manner, if the contents are a relatively viscous liquid such as cooking oil, the contents pass through the communication opening 30, then travel along the upper surface of the bottom wall 28, the inner surface of the hanging wall 26, the upper surface of the connecting wall 24, and the inner surface of the discharge tube 22, before being discharged from the upper edge of the discharge tube 22. After the container is turned upright and the contents have been discharged, the top lid 6 is pivoted back to the closed position and reattached to the lid body 4.

[0021] Here, the container lid 2 is provided with a connecting wall 24 extending radially inward from the inner peripheral surface of the discharge tube 22, and the contents are discharged along the upper surface of the connecting wall 24, so that the contents may remain on the upper surface of the connecting wall 24 even after the contents have been discharged. Furthermore, when the top lid 6 is further rotated to close from the state shown in Figure 3, i.e., a state in which the outer peripheral surface of the outer seal wall 40 and the inner peripheral surface of the hanging wall 26 are in continuous, tight contact in the circumferential direction except for the notch 48, the pressure in the closed space S surrounded on three sides by the upper surface of the connecting wall 24, the outer peripheral surface of the inner seal wall 38, and the inner peripheral surface of the discharge tube 22 increases, and it is thought that the contents remaining on the upper surface of the connecting wall 24 may fly out radially outward and upward through the gap G and fall, either after adhering to the lower surface of the top wall 32 or without adhering thereto, and may then adhere to the top wall 14. However, in the container lid constructed according to the present invention, due to the formation of notches 48 at the upper end of the inner peripheral surface of the hanging wall 26 and / or the lower end of the outer peripheral surface of the sealing means 36, air in the closed space S can move into the container through the notches 48, thereby preventing an increase in pressure in the closed space S. Therefore, with the synthetic resin container lid of the present invention, even if contents remain on the upper surface of the connecting wall 24, the contents remaining on the upper surface of the connecting wall 24 are prevented from flying outward and upward in the radial direction during the pivoting closing movement of the top lid 6 toward the closed position, thereby preventing the contents from adhering to the top wall 14. In the illustrated embodiment, the notches 48 are formed on the side opposite the side on which the hinge means 8 is provided in a plan view, and this opposite side is the portion of the top lid 6 that remains open until the end of the pivoting closing movement, thereby more effectively preventing an increase in pressure in the closed space S.

[0022] Although the synthetic resin container closure constructed according to the present invention has been described in detail above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiment, and appropriate modifications and changes can be made without departing from the scope of the present invention. For example, in the illustrated embodiment, the sealing means 36 is composed of a relatively long cylindrical inner sealing wall 38 and a relatively short cylindrical outer sealing wall 40 in the vertical direction, but as shown in Figure 5, the sealing means 36' may be composed of a single cylindrical wall having a tip end 38' with a relatively small outer diameter and a base end 40' with a relatively large outer diameter. [Explanation of symbols]

[0023] 2: Container lid 4: Lid body 6:Top lid 8: Hinge means 10: Mounting wall 14:Top wall 22: Discharge tube 24: Connecting wall 26: Hanging wall 28: Bottom wall 30: Communication opening 32: Top wall 34: Skirt Wall 36: Sealing means 48:Notch

Claims

1. The container comprises a lid body, and a top lid connected to the lid body via a hinge means and rotatable between a closed position that covers an upper surface of the lid body and an open position that exposes the upper surface of the lid body, The lid main body includes a cylindrical mounting wall, an annular upper wall extending radially inward from the inner peripheral surface of the mounting wall, a discharge tube extending upward from the upper surface of the upper wall, an annular connecting wall extending radially inward from the inner peripheral surface of the discharge tube, a cylindrical hanging wall hanging downward from the inner peripheral edge from the lower surface of the connecting wall, and a bottom wall extending radially inside the hanging wall, and a communication opening is formed in the bottom wall, the top cover includes a top wall and a cylindrical skirt wall depending from the periphery of the top wall, and a sealing means is provided on the lower surface of the top wall and extends continuously in the circumferential direction; When the top lid is pivoted toward the closed position, the outer peripheral surface of the sealing means provided on the top lid comes into close contact with the inner peripheral surface of the hanging wall provided on the lid body, and then comes into close contact with the inner peripheral surface of the discharge tube, A synthetic resin container lid, characterized in that a notch is formed in the upper end of the inner peripheral surface of the hanging wall and / or the lower end of the outer peripheral surface of the sealing means.

2. 2. The synthetic resin container lid according to claim 1, wherein the notch is formed on the side opposite to the side on which the hinge means is provided in a plan view.

3. 2. A synthetic resin container lid according to claim 1, wherein said sealing means comprises a relatively long cylindrical inner sealing wall and a relatively short cylindrical outer sealing wall in the vertical direction.

4. 2. The synthetic resin container closure according to claim 1, wherein said sealing means is formed of a single cylindrical wall having a tip end with a relatively small outer diameter and a base end with a relatively large outer diameter.

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