Synthetic resin container lid

Abstract

To provide a new synthetic resin container lid which does not increase production cost caused by the increase in the material use amount, and in which an upper lid is held at an intermediate opening position sufficiently and surely.SOLUTION: A concave part 29 is formed on the side which is further on the outside than a locking wall 24 on an outer peripheral edge part on an upper surface of a closing wall 10 of a lid body 4 and to which hinge means 8 is connected, and an extension piece 52 is formed extending downward on the side to which the hinge means 8 is connected on a lower surface of a skirt wall 42 of an upper lid 6 respectively. In the middle of the upper lid 6 being turned in the closing direction toward the closing position, a lower end of the extension piece 52 is brought into contact with a locking projection piece 26 of the lid body 4, and when the upper lid 6 is positioned at the closing position, the extension piece 52 is inserted in the concave part 29.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container lid comprising a lid body and an upper lid connected to the lid body via a hinge means and rotatable from a closed position covering the top surface of the lid body to an open direction exposing the top surface of the lid body, and from a closed position covering the top surface of the lid body to a closed position in an open direction. [Background technology]

[0002] A typical example of a synthetic resin container lid, a so-called hinge cap, is shown in Patent Document 1 below. The lid body includes a lid body and an upper lid connected to the lid body via hinge means. The lid body is rotatable from a closed position covering the upper surface of the lid body to an open position exposing the upper surface of the lid body, and from a closed position covering the upper surface of the lid body to a closed position covering the upper surface of the lid body. The lid body includes a closing wall and a cylindrical mounting wall hanging down from the periphery of the closing wall. A cylindrical locking wall is disposed on the outer peripheral edge of the upper surface of the closing wall, and a locking rib is formed on the upper end of the outer peripheral surface of the locking wall. The upper lid includes a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall. A lockable rib is formed on the lower end of the inner peripheral surface of the skirt wall. The hinge means is composed of a flexible strip and cannot alone hold the upper lid at a predetermined angular position relative to the lid body.

[0003] The container lid disclosed in Patent Document 1 below further has a protrusion formed on the upper end or upper surface of the outer peripheral surface of the skirt wall of the lid body. Due to this, when a user tilts the container with the top lid of the container lid open to drain the contents from the container, even if the top lid tries to rotate toward the closed position due to its own weight, the lower end of the skirt wall abuts on the protrusion, and the top lid is temporarily held in an intermediate open position. This prevents the top lid from obstructing the drainage and further prevents the contents from adhering to the inner surface of the top lid. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-173698 Summary of the Invention [Problem to be solved by the invention]

[0005] In the synthetic resin container lid disclosed in Patent Document 1, the protrusion is formed on the upper end or upper surface of the outer peripheral surface of the skirt wall of the lid body and is always exposed to the outside. Therefore, when the container lid alone or the container lid attached to the neck of a container is transported, the protrusion may collide with other container lids or containers and be damaged. If the protrusion is damaged, when a user tilts the container with the top lid open to drain the contents from the container, the top lid will rotate toward the closed position due to its own weight, hindering the drainage. Furthermore, the contents may adhere to the inner surface of the top lid, which is unhygienic. Furthermore, forming the protrusion increases the amount of material used, increasing manufacturing costs.

[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 will hold the top lid securely in an intermediate opening position without increasing the amount of material used and increasing manufacturing costs. [Means for solving the problem]

[0007] After careful consideration, the inventors discovered that the above-mentioned main technical problem can be solved by forming a recess on the upper surface of the closing wall of the lid body, outside the locking wall and on the side where the hinge means is connected, and an extension piece extending downward on the underside of the skirt wall of the upper lid, on the side where the hinge means is connected; the lower end of the extension piece abuts against the locking protrusion on the lid body as the upper lid is rotated in the closing direction towards the closed position; and when the upper lid is positioned in the closed position, the extension piece is inserted into the recess.

[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 that can be rotated from a closed position that covers the top surface of the lid body in an open direction that exposes the top surface of the lid body, and in a closed direction that covers the top surface of the lid body toward the closed position, The lid body includes a closing wall and a cylindrical mounting wall hanging down from the periphery of the closing wall, a cylindrical locking wall is disposed on the outer peripheral edge of the upper surface of the closing wall, and a locking protrusion is formed on the upper end of the outer peripheral surface of the locking wall, The upper lid is made of synthetic resin and has a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, and a locking projection is formed on the lower end of the inner peripheral surface of the skirt wall. a recess is formed on the upper surface of the closing wall of the lid body, on the side where the hinge means is connected, outside the locking wall, and an extension piece extending downward is formed on the lower surface of the skirt wall of the upper lid, on the side where the hinge means is connected, When the upper cover is rotated in the closing direction toward the closed position, the lower end of the extension piece abuts against the locking protrusion of the cover body, When the top lid is placed in the closed position, the extension piece is inserted into the recess.

[0009] Preferably, a cylindrical pouring wall is disposed on the upper surface of the closing wall of the lid body, and a cylindrical sealing wall is disposed on the lower surface of the top wall of the upper lid, and when the lid body is positioned in the closed position, the outer peripheral surface of the sealing wall is in close contact with the inner peripheral surface of the pouring wall. In this case, an extension extending radially outward and inclined upward is provided on the upper end of the pouring wall on the side where the hinge means is connected, and a tongue portion extending downward is provided on the seal wall on the side where the hinge means is connected, and when the lower end of the extension piece abuts the locking protrusion of the lid body, the lower end of the tongue portion is located above and radially inward of the outer end of the extension piece. The hinge means is preferably a flexible strip. [Effects of the Invention]

[0010] In the container lid constructed according to the present invention, a recess is formed on the upper surface of the closing wall of the lid body, outside the locking wall and on the side where the hinge means is connected, and an extension piece is formed on the lower surface of the skirt wall of the top lid, on the side where the hinge means is connected, and the lower end of the extension piece abuts against the locking protrusion of the lid body as the top lid is pivoted toward the closed position, temporarily holding the top lid in an intermediate-open position. As a result, when a user tilts the container with the top lid open to drain the contents from the container, the top lid is prevented from pivoting beyond the intermediate-open position due to its own weight, preventing the top lid from interfering with the drainage and preventing the contents from adhering to the inner surface of the top lid. Furthermore, when the top lid is positioned in the closed position, the extension piece is inserted into the recess and is not exposed to the outside. Therefore, when the container lid alone or the container lid attached to the neck of the container is transported, the extension piece is prevented from colliding with other container lids or containers and being damaged. Furthermore, when the top lid is positioned in the closed position, the extension piece is inserted into the recess. In other words, the shape of the extension piece corresponds to the shape of the recess, and more specifically, the volume of the extension piece is equal to or less than the volume of the recess. Therefore, the amount of material added to form the extension piece is less than the amount of material reduced to form the recess, and as a result, the amount of material used to mold the entire container lid is reduced. Therefore, with the synthetic resin container lid constructed according to the present invention, the top lid can be held in the intermediate open position sufficiently and reliably without increasing the amount of material used and increasing manufacturing costs. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a preferred embodiment of a synthetic resin container lid constructed according to the present invention in a molded state; [Figure 2] FIG. 2 is a plan view of the state shown in FIG. [Figure 3] FIG. 2 is a side view of the state shown in FIG. 1; [Figure 4] FIG. 2 is a bottom view of the state shown in FIG. 1. [Figure 5] FIG. 2 is a central longitudinal cross-sectional view of the state shown in FIG. 1. [Figure 6]2 is a central vertical cross-sectional view of the container lid shown in FIG. 1 in a state where the top cover is in a required intermediate angle position. [Figure 7] 2 is a central vertical cross-sectional view of the container lid shown in FIG. 1 in a state where the top lid is in a closed position. DETAILED DESCRIPTION OF THE INVENTION

[0012] A preferred embodiment of a synthetic resin container lid constructed according to the present invention will be described in more detail below with reference to the accompanying drawings. Unless otherwise specified, the up-down direction in this specification is based on the state in which the top lid is in the closed position (described later). Therefore, when the top surface of the lid body is exposed, i.e., in the state shown in Figures 1 to 5, the up-down direction of the top lid is reversed.

[0013] 1 to 5, a synthetic resin container lid generally designated by the numeral 2 comprises a lid body 4 and an upper lid 6, and the lid body 4 and the upper lid 6 are connected via hinge means 8. The container lid 2 is integrally molded in the state shown in FIGS.

[0014] Referring mainly to Figure 5, the lid body 4 has a closing wall 10 and a cylindrical mounting wall 12 hanging down from the periphery of the closing wall 10. The closing wall 10 is circular in plan view, i.e., in Figure 2, and is divided into a removal area 16 surrounded by an annular breakable thin-wall line 14 and a remaining area 18 outside the breakable thin-wall line 14. The breakable thin-wall line 14 is formed by a groove formed in the underside of the closing wall 10. A well-known pull ring 20 is formed on the upper surface of the removal area 16.

[0015] A generally cylindrical pouring wall 22 extending upward is disposed on the inner peripheral edge of the upper surface of the remaining area 18. The upper end of the pouring wall 22 is curved radially outward. An extension 23 extending radially outward at a slight upward incline is provided on the side of the upper end of the pouring wall 22 where the hinge means 8 is connected. A cylindrical locking wall 24 is disposed on the outer peripheral edge of the upper surface of the remaining area 18, i.e., on the upper surface of the closing wall 10 outside the pouring wall 22. An annular locking protrusion 26 is formed at the upper end of the outer peripheral surface of the locking wall 24. A cylindrical sealing tube 28 hanging downward is formed on the inner peripheral edge of the lower surface of the remaining area 18. A recess 29 is formed on the upper surface of the remaining area 18 (i.e., on the upper surface of the closing wall 10 of the lid body 4) outside the locking wall 24 and on the side where the hinge means 8 is connected.

[0016] A locking means 30 is disposed at the lower end of the inner circumferential surface of the mounting wall 12, protruding radially inward. In the illustrated embodiment, the locking means 30 is configured as a continuous annular ridge extending circumferentially. If desired, the locking means 30 may be configured as a plurality of arcuate ridges spaced circumferentially. In the illustrated embodiment, the inner circumferential surface of the mounting wall 12 further includes a reduced-diameter portion 32 at the upper end, which is annular and has a reduced inner diameter. The upper end of the reduced-diameter portion 32 also includes an annular ridge 34 protruding radially inward. A number of rectangular-shaped depending pieces 36 are formed at equal angular intervals around the circumferential line on the lower surface of the reduced-diameter portion 32, extending radially downward. The radially outer ends of all depending pieces 36 are connected to the inner circumferential surface of the mounting wall 12, and their radially inner surfaces are vertically continuous with the inner surface of the reduced-diameter portion 32. An arc-shaped notch 38 is formed on the upper end of the outer peripheral surface of the mounting wall 12 on the side opposite to the hinge means 8 .

[0017] 1 to 5 as well as FIGS. 6 and 7, the top lid 6 includes a top wall 40 and a cylindrical skirt wall 42 that hangs down from the periphery of the top wall 40. The lower end of the outer periphery of the skirt wall 42 is connected to the upper end of the outer periphery of the mounting wall 12 of the lid body 4 via hinge means 8. As described above, the container lid 2 is integrally formed with the container lid 2 in the state shown in FIGS. 1 to 5, i.e., in a state in which the top lid 6 is opened 180 degrees relative to the lid body 4. The top lid 6 can be rotated in a closing direction toward a closed position (shown in FIG. 7) that covers the top surface of the lid body 4, and in an opening direction from the closed position to expose the top surface of the lid body 4. In the illustrated embodiment, the top wall 40 is a circle extending substantially horizontally, and the skirt wall 42 is cylindrical. A cylindrical sealing wall 44 that hangs down is formed in the center of the lower surface of the top wall 40. When the top lid 6 is positioned in the closed position, the outer peripheral surface of the sealing wall 44 is in close contact with the inner peripheral surface of the pouring wall 22 formed on the lid body 4. A downwardly extending tongue 46 is provided on the side of the sealing wall 44 where the hinge means 8 is connected. When viewed in the vertical direction, the tongue 46 extends downward beyond the lower edge of the skirt wall 42. When the top lid 6 is positioned in the closed position, the outer surface of the tongue 46 faces the inner peripheral surface of the pouring wall 22 at a distance. Four approximately triangular reinforcing ribs 48 are arranged at equal angular intervals in the circumferential direction on the outer peripheral edge of the lower surface of the top wall 40 or the upper end of the inner peripheral surface of the skirt wall 42. A flange 50 protruding radially outward is provided at the diametrically opposite side of the hinge means 8 at the lower end of the outer peripheral surface of the skirt wall 42, and can be hooked with a finger when pivoting the top lid 6 open or closed. An extension piece 52 extending downward is formed on the underside of the skirt wall 42 on the side where the hinge means 8 is connected. As shown in Figure 6, while the top cover 6 is being pivoted in the closing direction toward the closed position, the lower end of the extension piece 52 abuts against the locking rib 26 of the cover body 4, more specifically, against its upper surface or outer periphery. Then, when the top cover 6 is positioned at the closed position, as shown in Figure 7, the extension piece 52 is inserted into the recess 29 formed on the upper surface of the closing wall 10 of the cover body 4. Because the lower end of the extension piece 52 only abuts against the locking rib 26 of the cover body 4, the lower end of the extension piece 52 can elastically overcome the locking rib 26 by applying a certain amount of force to the top cover 6.A circular engaging rib 54 is disposed at the lower end of the inner peripheral surface of the skirt wall 42. When the top cover 6 is positioned in the closed position, the engaging rib 54 is elastically engaged with the engaging rib 26 of the cover body 4, and the top cover 6 is held in the closed position.

[0018] The hinge means 8 is a flexible strip and cannot alone hold the top lid 6 at a predetermined angular position relative to the lid body 4. Therefore, although the container lid 2 is molded in the state shown in Figures 1 to 5, i.e., with the top lid 6 open 180 degrees relative to the lid body 4, the top lid 6 is not held in the open position at a 180 degree open position relative to the lid body 4.

[0019] 5 to 7, a container lid 2 constructed according to the present invention is shown by a two-dot chain line, along with the mouth and neck portion of a container to which the container lid 2 is applied. The container mouth and neck portion 100, which can be formed from an appropriate synthetic resin or glass, is cylindrical with an open top, and has an engaging protrusion 102 formed at the upper end of its outer periphery. When the container lid 2 is attached to the mouth and neck portion 100 to seal it after the contents have been placed in the container, the container lid 2, with the top lid 6 in the closed position, is fitted over the mouth and neck portion 100 and forced downward. As a result, as shown in Figure 7, the upper end of the mouth and neck portion 100 is fitted between the inner surface of the reduced diameter portion 32 formed at the upper end of the inner surface of the mounting wall 12 and the outer surface of the sealing tube 28, so that the annular protrusion 34 comes into close contact with the outer edge of the top surface of the mouth and neck portion 100, and the locking means 30 formed at the lower end of the inner surface of the mounting wall 12 elastically climbs downward over the fitting protrusion 102 of the mouth and neck portion 100 and is locked thereto.

[0020] Continuing the explanation with reference to Figure 7, when discharging the contents of the container, first, a finger is placed under the flange 50 of the top lid 6, and an upward force is applied to the flange 50 around the hinge means 8, causing the top lid 6 to pivot from the closed position to the open position, exposing the top surface of the lid body 4. Next, a finger is placed on the pull ring 20 of the lid body 4 and forced upward, breaking the breakable thin-wall line 14 and removing the removal area 16 from the closing wall 10. In this way, a discharge opening (not shown) is created in the closing wall 10. Thereafter, by tilting the container appropriately, the contents of the container can be discharged through the discharge opening.

[0021] At this time, as described above, the hinge means 8 cannot alone hold the top lid 6 at a predetermined angular position relative to the lid body 4. Therefore, when a user tilts the container with the top lid 6 of the container lid 2 open, the top lid 6 will tend to swing in the closing direction toward the closed position due to its own weight. However, in the container lid constructed according to the present invention, as shown in FIG. 6 , when the top lid 6 swings in the closing direction toward the closed position, the lower end of the extension piece 52 abuts against the locking protrusion 26 of the lid body 4, so that the top lid 6 is temporarily held in the intermediate opening position. Therefore, when a user tilts the container with the top lid 6 of the container lid 2 open, the top lid 6 swings in the closing direction toward the closed position due to its own weight, but is prevented from swinging in the closing direction beyond the intermediate opening position, preventing the top lid 6 from obstructing the discharge and further preventing the contents from adhering to the inner surface of the top lid 6.

[0022] To finish discharging the contents, the container is turned upright. As shown in FIG. 6 , in the illustrated embodiment, when the lower end of the extension piece 52 abuts against the locking ridge 26, the lower end of the tongue 46 formed on the top lid 6 is positioned above and radially inward of the outer end of the extension 23 formed on the pouring wall 22 of the lid body 4. Therefore, when the container is turned upright, the contents adhering to the lower surface of the top wall 40 of the top lid 6 are guided from the inner circumferential surface of the sealing wall 44, through the inner surface of the tongue 46, to the upper surface of the extension 23 of the pouring wall 22, and are collected into the container without dripping onto the upper surface of the remaining area 18 of the closure wall 10. After the container is turned upright, the top lid 6 is rotated in the closing direction to the closed position around the hinge means 8. As described above, the lower end of the extension piece 52 merely abuts against the locking protrusion 26 of the lid body 4, so that by applying a small amount of force to the upper lid 6, the lower end of the extension piece 52 can elastically overcome the locking protrusion 26.

[0023] In the container lid constructed according to the present invention, a recess 29 is formed on the upper surface of the closing wall 10 of the lid body 4, outside the locking wall 24 and on the side where the hinge means 8 is connected, and an extension piece 52 is formed on the lower surface of the skirt wall 42 of the top lid 6, on the side where the hinge means 8 is connected, and as the top lid 6 is rotated toward the closed position, the lower end of the extension piece 52 abuts against the locking protrusion 26 of the lid body 4, and the top lid 6 is temporarily held in the intermediate open position. As a result, when a user tilts the container with the top lid 6 of the container lid 2 open to discharge the contents from the container, the top lid 6 is prevented from rotating in the closing direction beyond the intermediate open position due to its own weight, which prevents the top lid 6 from obstructing the discharge and further prevents the contents from adhering to the inner surface of the top lid 6. Furthermore, when the top lid 6 is positioned in the closed position, the extension piece 52 is inserted into the recess 29 and is not exposed to the outside. Therefore, when the container lid 2 alone or the container lid 2 attached to the container neck portion 100 is transported, the extension piece 52 is prevented from colliding with other container lids or containers and being damaged. Furthermore, when the top lid 6 is positioned in the closed position, the extension piece 52 is inserted into the recess 29. In other words, the shape of the extension piece 52 corresponds to the shape of the recess 29, and more specifically, the volume of the extension piece 52 is equal to or less than the volume of the recess 29. Therefore, the increase in material usage in forming the extension piece 52 is less than the reduction in material usage in forming the recess 29, and as a result, the amount of material required to mold the entire container lid is reduced. Therefore, with the synthetic resin container lid constructed according to the present invention, the top lid can be held securely in the intermediate open position without increasing the amount of material usage and the manufacturing cost.

[0024] 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 are possible within the scope of the present invention. The synthetic resin container closure constructed according to the present invention is not limited to the neck portion of the container shown in the drawings, but can be applied to the neck portion of any container. In other words, the shape of the neck portion of the container to which the synthetic resin container closure constructed according to the present invention is applied may be any shape. [Explanation of symbols]

[0025] 2: Container lid 4: Lid body 6:Top lid 8: Hinge means 10:Occluded wall 12: Mounting wall 22: Pour wall 23: Extension part 24: Retaining wall 26: Locking ridge 28: Seal tube 29: Recess 40: Top wall 42: Skirt Wall 44: Seal wall 46: Tongue 52: Extension piece 54: Locked protrusion

Claims

1. The container comprises a lid body, and an upper lid connected to the lid body via a hinge means and rotatable from a closed position covering the upper surface of the lid body to an open direction exposing the upper surface of the lid body, and from a closed position covering the upper surface of the lid body to the closed position in an open direction, The lid body includes a closing wall and a cylindrical mounting wall hanging down from the periphery of the closing wall, a cylindrical locking wall is disposed on the outer peripheral edge of the upper surface of the closing wall, and a locking protrusion is formed on the upper end of the outer peripheral surface of the locking wall, The upper lid is made of synthetic resin and has a top wall and a cylindrical skirt wall hanging down from the periphery of the top wall, and a locking projection is formed on the lower end of the inner peripheral surface of the skirt wall. a recess is formed on the upper surface of the closing wall of the lid body, on the side where the hinge means is connected, outside the locking wall, and an extension piece extending downward is formed on the lower surface of the skirt wall of the upper lid, on the side where the hinge means is connected, When the upper cover is rotated in the closing direction toward the closed position, the lower end of the extension piece abuts against the locking protrusion of the cover body, When the top lid is in the closed position, the extension piece is inserted into the recess.

2. 2. A synthetic resin container lid as claimed in claim 1, wherein a cylindrical pouring wall is disposed on the upper surface of the closing wall of the lid body and a cylindrical sealing wall is disposed on the lower surface of the top wall of the upper lid, and when the lid body is positioned in the closed position, the outer surface of the sealing wall is brought into tight contact with the inner surface of the pouring wall.

3. A synthetic resin container lid as described in claim 2, wherein an extension portion extending radially outward and inclined upward is provided on the side of the upper end of the pouring wall where the hinge means is connected, and a tongue portion extending downward is provided on the side of the sealing wall where the hinge means is connected, and when the lower end of the extension piece abuts against the locking protrusion of the lid body, the lower end of the tongue portion is positioned above and radially inward of the outer end of the extension portion.

4. 2. The synthetic resin container lid according to claim 1, wherein said hinge means is a flexible strip.

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