Screw-capped container

Abstract

To provide a screw-capped container to be opened / closed at a small angle of rotation and less apt to be unscrewed even if the internal pressure of a container body increases.SOLUTION: A screw-capped container comprises a container body A and a screw cap B. The container body has, on an outer periphery of a cylindrical mouth 1, a sloped thread 2 and an abutment protrusion 9 below the sloped thread. The sloped thread has upper threaded protrusions 6 provided in a plurality of positions equally spaced circumferentially, lower threaded protrusions 8 provided in parallel at predetermined spacing below the upper threaded protrusions, and inclined threaded protrusions 7 continuing between the lower threaded protrusion and the upper threaded protrusion. The screw cap has a top wall 10 and an outer peripheral wall 11 vertically extending from an outer edge of the top wall. The outer peripheral wall has, on an inner periphery, upper cap threaded protrusions 15 provided equally spaced at an equal height in a plurality of positions, lower cap threaded protrusions 16 provided in parallel at predetermined spacing below the upper cap threaded protrusions, and a vibration projection 22 provided protruding below the lower cap threaded protrusion and to get over the abutment protrusion of the cylindrical mouth.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a screw cap container having a screw cap that screws onto the mouth of the container body, and in particular to a screw cap container that can be easily opened and closed with a small rotation angle and that can prevent the screw cap from coming off due to internal pressure. [Background technology]

[0002] BACKGROUND ART Screw cap containers have been widely used in the past, in which a female thread provided on a screw cap is screwed onto a male thread provided on the mouth of a container body to open and close the container. In particular, screw cap containers have been known for some time, which have a container body with multiple threads on the outer surface of the nozzle and a screw cap with an engaging portion on the inner surface that engages with the threads, and which can be opened and closed with a rotation angle smaller than one turn, and which cannot be easily released after closing (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-136745 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the screw cap container described in Patent Document 1 above has the problem that when the screw cap is placed over the container body during closure, the lid may become slanted. This is particularly true for wide-mouth containers, and when this occurs, it is necessary to apply force to forcibly return the container to a horizontal position. In some cases, this force may not be enough to prevent the slanted position from being corrected, resulting in poor closure.

[0005] Furthermore, in the screw cap container described in Patent Document 1, due to its structure, the lid must be rotated approximately 240° to open it from a closed state. Furthermore, when the internal pressure inside the container body increases due to a rise in temperature during storage after the contents have been filled, the screw cap is pushed up by the internal pressure, causing the screw cap to become unscrewed.

[0006] The present invention aims to solve the above problems and to provide a screw cap container that can be opened and closed with a small rotation angle and that is difficult to unscrew even if the internal pressure of the container body increases due to a rise in temperature during storage after filling with contents. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention provides a screw cap container comprising a container body and a screw cap that screws onto the neck portion of the container body, wherein the container body has a sloping threaded portion protruding from the outer periphery of the neck portion and a contact protrusion protruding below the sloping threaded portion, the sloping threaded portion having upper threaded protrusions arranged at multiple locations equally spaced circumferentially, lower threaded protrusions parallel to and spaced a predetermined distance below the upper threaded protrusions, and an inclined threaded protrusion connected between the lower and upper threaded protrusions, and the screw cap has a top wall and an outer peripheral wall extending down from the outer edge of the top wall, and the outer peripheral wall has upper cap threaded protrusions arranged at multiple locations equally spaced and at the same height on the inner periphery, lower cap threaded protrusions parallel to and spaced a predetermined distance below the upper cap threaded protrusions, and a vibration protrusion protruding below the lower cap threaded protrusion that overcomes the contact protrusion of the neck portion when the lid is closed.

[0008] In one embodiment of the screw cap container, the upper screw protrusion has an upper flat surface portion that is flat at the top and a lower inclined surface portion that is inclined at a predetermined angle toward the direction of rotation when the lid is closed, and the lower screw protrusion has an upper surface portion at the top and a lower inclined surface portion that is inclined at a predetermined angle toward the direction of rotation when the lid is closed, and the upper cap screw protrusion and the lower cap screw protrusion have an inclined upper portion that is inclined downward toward the direction of rotation when the lid is closed and a flat lower portion that is flat at the bottom.Furthermore, the container body has a locking protrusion that protrudes below the abutting protrusion of the spout portion, and the screw cap has a sealing ring that is connected to the lower end of the outer wall via a breakable weakened piece and fits onto the locking protrusion. [Effects of the Invention]

[0009] By adopting the above-mentioned configuration, the screw cap container of the present invention keeps the screw cap horizontal to the container body when it is placed over the mouth of the container body during closure, preventing it from being placed at an angle, and allows the container to be easily sealed with a small rotation angle.When opening the lid, the lid can be easily opened with a small rotation angle, and a clicking sensation is given to the user when opening and closing, informing them of the opening and closing status. Furthermore, after filling the contents, the internal pressure of the container body can increase due to a rise in temperature during storage, preventing the screw cap from being pushed upward and coming off, thereby maintaining a safe closed state. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are explanatory views of a screw cap container according to a first embodiment of the present invention when the lid is closed, in which (a) is a cross-sectional view taken along the line XX in (b), and (b) is a partially transparent side view. [Figure 2] 1A and 1B are explanatory views of a container body of a screw cap container according to a first embodiment of the present invention, in which (a) is a top view and (b) is a side view. [Figure 3] 1A and 1B are explanatory views of a screw cap of a screw cap container according to a first embodiment of the present invention, in which (a) is a side cross-sectional view and (b) is a bottom view. [Figure 4] 1 is a diagram illustrating the operation of the sloped thread portion of the container body and the cap screw protrusion of the screw cap in the first embodiment of the present invention. (a) is the unthreaded state during opening and closing operations, (b) is the initial stage of threading or before the threads come loose, (c) is the middle stage of threading, and (d) is the completed state of threading. [Figure 5] 10A and 10B are explanatory views of a screw cap container according to a second embodiment of the present invention when the lid is closed, in which (a) is a cross-sectional view taken along line YY in (b), and (b) is a partially perspective side view. [Figure 6] FIG. 10 is a partially perspective side view of the screw cap and the container body of the screw cap container according to the second embodiment of the present invention when the lid is open. DETAILED DESCRIPTION OF THE INVENTION

[0011] Next, the screw cap container of the present invention will be described by way of examples with reference to the drawings. In the following description, for convenience, sections a, b, c, and d are set at 90° intervals clockwise from the right side of FIG. 1(a) as 0° (starting point).

[0012] Example 1 In FIG. 1, A is the container body and B is the screw cap. As shown in Figures 1 and 2, the container body A has a four-thread sloped thread portion 2 (2a, 2b, 2c, 2d) that screws onto the screw cap B on the outer periphery of the nozzle portion 1, a bead ring 3 located below the sloped thread portion 2, and a neck ring 4 located below the bead ring 3 protruding from the outer periphery of the nozzle portion 1. The neck ring 4 has a diameter equal to or slightly larger than the outer diameter of the screw cap B and is formed so as to close the lower inside of the screw cap B.

[0013] As shown in Figure 2(b), the sloped screw portion 2 is formed with a width of dimension α and is arranged in four locations at 90° intervals (equally spaced) around the circumference and at the same height. Each of these is composed of a horizontal upper screw protrusion 6 with a circumferential length (angular range) of approximately 30° facing the direction of rotation when the lid is closed, an inclined screw protrusion 7 that has a circumferential length (angular range) of approximately 30° from the end of the upper screw protrusion 6 and slopes downward at a predetermined interval β (an interval at least equal to or greater than dimension α), and a lower screw protrusion 8 that is parallel to the upper screw protrusion 6 and has a circumferential length (angular range) of approximately 30° from the end of the inclined screw protrusion 7. The sloped threaded portion 2 is formed such that the ratio of the circumferential lengths of the upper screw protrusion 6, the inclined screw protrusion 7, and the lower screw protrusion 8 is 1:1:1, and the end position of each lower screw protrusion 8 is located below the start end of the upper screw protrusion 6 of the next sloped threaded portion 2.

[0014] The upper screw protrusion 6 has an upper flat surface portion 6a that is flat at the top and a lower inclined surface portion 6b that is inclined at a gentle angle θ toward the direction of rotation when the lid is closed, and is protruded from the outer periphery of the nozzle portion 1. The inclined screw projection 7 has an upper inclined portion 7a at its upper end and a lower inclined portion 7b at its lower end, which are provided on the outer periphery of the nozzle tube 1 between the upper screw projection 6 and the lower screw projection 8. The lower screw projection 8 has an upper surface 8a at the top and a lower inclined surface 8b at the bottom that is inclined at a gentle angle θ toward the direction of rotation when the lid is closed, and is protruded from the outer periphery of the nozzle 1.

[0015] The bead ring 3 is formed to have a larger diameter than the outer diameter of the slope thread portion 2, and has a contact projection 9 projecting from the outer periphery. The contact protrusions 9 may be formed continuously or intermittently at intervals.

[0016] As shown in Figures 1 and 3, screw cap B consists of a disk-shaped top wall 10 and a cylindrical outer wall 11 that hangs down from the outer edge of top wall 10. An inner sealing cylinder 12 hangs down from the back of top wall 10, and its outer periphery is inserted into and tightly fits into the inner periphery of mouth 1 of container body A when the lid is closed. A contact ring 13 that protrudes from the outside of inner sealing cylinder 12 and tightly fits into the top surface of mouth 1. The outer periphery of the outer wall 11 is provided with finger grips such as knurling 14 to provide a good grip when gripped with fingers or the like.

[0017] The inner periphery of the outer wall 11 is formed with a width of dimension γ (at least equal to or smaller than the spacing β of the sloped thread portion 2 of the container body A), and as shown in Figure 3, is arranged at four locations at 90° intervals (equally spaced) and the same height in the circumferential direction, with upper cap screw protrusions 15 (15a, 15b, 15c, 15d) each having a circumferential length of approximately 30°, and lower cap screw protrusions 16 (16a, 16b, 16c, 16d) parallel to and spaced downward from the upper cap screw protrusions 15 by a predetermined spacing δ (at least equal to or larger than the width α), and below the lower cap screw protrusions 16 are protruding vibration protrusions 22 that climb over the abutment protrusions 9 of the bead ring 3 and vibrate slightly when the lid is closed.

[0018] As shown in FIG. 3, the lower cap screw protrusions 16 are arranged in the circumferential direction such that the starting end positions of the respective lower cap screw protrusions 16 are located below the terminal ends of the upper cap screw protrusions 15 . The upper cap screw protrusion 15 and the lower cap screw protrusion 16 are respectively formed so that their widths taper from an inclined upper portion 17 and an inclined upper portion 19, which are inclined downward in the direction of rotation when the lid is closed, and a flat lower portion 18 and a flat lower portion 20, which are flat at the bottom.

[0019] The inclined upper portions 17 and 19 are formed with upper inclined surfaces 17a and 19a that are inclined at a gentle angle θ toward the direction of rotation when the lid is closed, and engage with the lower inclined surface portions 6b and 8b of the upper screw protrusion 6 and the lower screw protrusion 8, and upper inclined end portions 17b and 19b at the end toward the direction of rotation that engage with the lower inclined portion 7b of the inclined screw protrusion 7. The angle of the upper inclined surfaces 17a and 19a is the same as the angle of the lower inclined surface portions 6b and 8b, and the angle of the upper inclined end portions 17b and 19b is the same as the angle of the lower inclined portion 7b. The flat lower parts 18 and 20 have lower flat surface parts 18a and 20a that engage with the upper flat surface parts 6a and 8a of the upper screw protrusions 6 and lower screw protrusions 8 when the lid is closed, and lower inclined end parts 18b and 20b that engage with the upper inclined part 7a of the inclined screw protrusion 7 at the opposite end in the direction of rotation, and the angle of the upper inclined part 7a and the angle of the lower inclined end parts 18b and 20b are approximately the same.

[0020] The vibrating protrusions 22 need only vibrate slightly and give a clicking sensation when they come into contact with the contact protrusions 9 of the bead ring 3, deform, overcome and restore their original shape, and may be formed continuously or may be formed intermittently at intervals that are at least larger than the spacing between the contact protrusions 9 and do not allow them to slip through. Note that the vibrating protrusions 22 may be configured to emit a sound when they come into contact with and overcome the contact protrusions 9.

[0021] Next, the manner of use and the effects of the screw cap container of this embodiment will be described. As shown in Figure 4(a), the nozzle 1 of the container body A filled with the contents is placed from above by aligning the lower surface areas of the lower cap screw protrusions 16a, 16b, 16c, and 16d of the screw cap B with the upper surface areas of the lower screw protrusions 8 of the sloped screw portions 2a, 2b, 2c, and 2d, and then the screw cap B is placed on the nozzle 1 and set in the state before closing.

[0022] For example, when the lower surface area of ​​the lower cap screw protrusions 16a, 16b, 16c, and 16d of the screw cap B is located in the upper surface area of ​​each of the upper screw protrusions 6 of the sloped screw portions 2a, 2b, 2c, and 2d, the lower flat surface portions 20a of the flat lower portions 20 of the lower cap screw protrusions 16a, 16b, 16c, and 16d come into contact with the upper flat surface portions 6a of the upper screw protrusions 6 of each of the sloped screw portions 2a, 2b, 2c, and 2d, engaging with each other at the flat surface, allowing for horizontal rotation but keeping the screw cap B horizontal and preventing it from descending.

[0023] Furthermore, when the lower surface areas of the lower cap screw protrusions 16a, 16b, 16c, and 16d of the screw cap B are positioned in the upper surface areas of the inclined screw protrusions 7 of the sloped screw portions 2a, 2b, 2c, and 2d, the lower inclined end portions 20b of the flat lower portions 20 of the lower cap screw protrusions 16a, 16b, 16c, and 16d come into contact with the upper inclined portions 7a of the inclined screw protrusions 7 of the sloped screw portions 2a, 2b, 2c, and 2d, respectively, and are guided according to the inclination. Therefore, the screw cap B is rotated in the closing direction while being kept horizontal against the downward movement of the lower cap screw protrusions 16a, 16b, 16c, and 16d, and finally, as shown in FIG. 4(a), the screw cap B is set in a state where the lower surface areas of the lower cap screw protrusions 16a, 16b, 16c, and 16d of the screw cap B are aligned with the upper surface areas of the lower screw protrusions 8 of the sloped screw portions 2a, 2b, 2c, and 2d, respectively.

[0024] When the outer wall 11 of the screw cap B is aligned with the mouth 1 of the container body A and placed over it, the lower flat surface 20a of the flat lower part 20 of each of the lower cap screw protrusions 16a, 16b, 16c, 16d abuts against the upper surface 8a of each of the lower screw protrusions 8 of the sloping screw parts 2a, 2b, 2c, 2d, and the lower flat surface 18a of each of the flat lower parts 18 of the upper cap screw protrusions 15a, 15b, 15c, 15d abuts against the upper flat surface 6a of each of the upper screw protrusions 6 of the sloping screw parts 2a, 2b, 2c, 2d, so that the screw cap B is placed horizontally over the mouth 1 of the container body A before closing.

[0025] When the screw cap B is aligned with and placed over the nozzle 1 of the container body A as shown in Figure 4(a), and then rotated in the closing direction, the flat lower parts 20 and 18 of the lower cap screw protrusions 16a, 16b, 16c, 16d and the upper cap screw protrusions 15a, 15b, 15c, 15d come into contact with the upper surface parts 8a and upper flat surface parts 6a of the lower screw protrusions 8 and upper screw protrusions 6 of the sloped screw parts 2a, 2b, 2c, 2d, respectively, and rotate horizontally in the closing direction.

[0026] Next, when the screw cap B is rotated approximately 30° from the start of rotation in the closing direction, as shown in Figure 4(b), the upper inclined end portions 19b of the inclined upper portions 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c move to a position where they abut against the upper portions of the lower inclined portions 7b of the inclined screw protrusions 7 of the sloped screw portions 2a, 2b, 2c, and 2d, respectively, and the lower inclined end portions 18b of the flat lower portions 18 of the upper cap screw protrusions 15a, 15b, 15c, and 15d move to a position where they abut against the upper portions of the upper inclined portions 7a of the inclined screw protrusions 7 of the sloped screw portions 2a, 2b, 2c, and 2d, respectively.

[0027] Furthermore, when the screw cap B is rotated in the closing direction, the screw cap B is lowered as it rotates according to the inclination at which the upper inclined end portion 19b of each inclined upper portion 19 abuts against the lower inclined portion 7b of each inclined screw protrusion 7. Furthermore, the lower inclined end portion 18b of each flat lower portion 18 rotates while abutting against the upper inclined portion 7a of each inclined screw protrusion 7, so that it descends while being kept horizontal in accordance with the inclination.

[0028] Next, when the screw cap B is rotated approximately 60° from the start of rotation in the closing direction, as shown in Figure 4(c), the upper inclined end portion 19b of each inclined upper portion 19 of the lower cap screw protrusions 16d, 16a, 16b, 16c moves to a position where it exceeds the lower part of the lower inclined portion 7b of each inclined screw protrusion 7 of the sloped screw portions 2a, 2b, 2c, 2d, and the lower flat surface portion 18a of each flat lower portion 18 of the upper cap screw protrusions 15a, 15b, 15c, 15d moves to a position where it abuts the upper surface portion 8a of each lower screw protrusion 8 of the sloped screw portions 2a, 2b, 2c, 2d. In this state, the screw cap B is maintained horizontally because the lower flat surface portion 18a of each flat lower portion 18 abuts against the upper surface portion 8a of each lower screw protrusion 8.

[0029] Furthermore, when the screw cap B is rotated in the closing direction, the upper inclined surfaces 19a of the inclined upper parts 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c come into contact with the lower inclined surfaces 8b of the lower screw protrusions 8 of the sloped screw parts 2a, 2b, 2c, and 2d from their ends, and the upper inclined surfaces 17a of the inclined upper parts 17 of the upper cap screw protrusions 15d, 15a, 15b, and 15c come into contact with the lower inclined surfaces 6b of the upper screw protrusions 6 of the sloped screw parts 2a, 2b, 2c, and 2d from their ends, sliding with the rotation, causing the screw cap B to descend slightly.

[0030] As the screw cap B is rotated and slightly lowered, the vibration projection 22 on the lower inner periphery of the outer peripheral wall 11 of the screw cap B comes into contact with the upper outer periphery of the contact projection 9 of the bead ring 3 of the container body A. Finally, the vibration projection 22 overcomes the contact projection 9, and as shown in FIG. 4(d), at a position where the screw cap B is rotated about 90° from the start of rotation in the closing direction, the contact ring 13 on the back surface of the top wall 10 of the screw cap B comes into contact with the upper surface of the nozzle 1, and the bottom of the screw cap B The lowering is stopped, and furthermore, the upper inclined surfaces 19a of the inclined upper parts 19 of the lower cap screw protrusions 16d, 16a, 16b, 16c engage with the lower inclined surface parts 8b of the lower screw protrusions 8 of the sloped thread parts 2a, 2b, 2c, 2d, respectively, and the upper inclined surfaces 17a of the inclined upper parts 17 of the upper cap screw protrusions 15d, 15a, 15b, 15c engage with the lower inclined surface parts 6b of the upper screw protrusions 6 of the sloped thread parts 2a, 2b, 2c, 2d, respectively, thereby closing the lid.

[0031] When the lid is closed, the vibration projection 22 of the screw cap B overcomes the contact projection 9 of the container body A and vibrates, giving the user of the container a clicking sensation and letting them know that the lid is closed.

[0032] When the screw cap B is closed, the contact ring 13 on the back surface of the top wall 10 of the screw cap B abuts against the upper surface of the nozzle 1, causing the screw cap B to stop descending and reach the terminal position. The upper inclined surfaces 19a and 17a of the inclined upper parts 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c and the upper cap screw protrusions 15d, 15a, 15b, and 15c engage with the lower inclined surfaces 8b and 6b of the lower screw protrusions 8 and upper screw protrusions 6 of the container body A, stopping the screw cap B from rotating in the closing direction and completely closing the container. At the terminal position, the upper inclined end 17b of the upper cap screw protrusion 15 is engaged with the lower inclined portion 7b of the sloped screw portion 2. Furthermore, the contact ring 13 on the back surface of the top wall 10 of the screw cap B is in close contact with the upper surface of the cylindrical mouth portion 1, and the inner sealing cylinder portion 12 is inserted into the inner periphery of the cylindrical mouth portion 1 to form a tight seal.

[0033] When the lid is closed, the lower surface or part of either the lower cap screw protrusions 16a, 16b, 16c, 16d or the upper cap screw protrusions 15a, 15b, 15c, 15d on the outer wall 11 of the screw cap B comes into even contact with the upper surface of the four sloped screw portions 2a, 2b, 2c, 2d formed at 90° intervals on the mouth 1 of the container body A, so that the screw cap B can always be placed horizontally on the mouth 1 of the container body A, preventing the screw cap B from being placed at an angle on the mouth 1 and allowing the lid to be closed stably. Furthermore, when the screw cap B is aligned with the container body A and placed on top, it can be closed simply by rotating it approximately 90° in the closing direction.

[0034] In the screw cap container of this embodiment, after filling the contents, if the internal pressure of container body A increases due to a rise in temperature during storage, etc., screw cap B is pushed upward. However, the sloping upper portions 19 of each of lower cap screw protrusions 16d, 16a, 16b, 16c of screw cap B and the sloping upper portions 17 of each of upper cap screw protrusions 15d, 15a, 15b, 15c are firmly engaged doubly, vertically, with the lower screw protrusions 8 and upper screw protrusions 6 on the upper surfaces of sloped screw portions 2a, 2b, 2c, 2d, respectively, so that the screw cap B is prevented from rising and from coming off upward.

[0035] When opening the screw cap B, first rotate the screw cap B in the opening direction, and the upper inclined surfaces 19a and 17a of the inclined upper parts 19 of the lower cap screw protrusions 16d, 16a, 16b, 16c and the upper cap screw protrusions 15d, 15a, 15b, 15c engage with the lower inclined surface portions 8b and 6b of the lower screw protrusions 8 and upper screw protrusions 6 of the container body A, respectively, and slide against each other, lifting the screw cap B slightly, and causing the vibration protrusions 22 on the lower inner periphery of the outer wall 11 to climb over the abutment protrusions 9 from bottom to top. The vibrating projection 22 moves upward over the contact projection 9 and vibrates, giving the user of the container a clicking sensation, thereby informing them that the lid is about to be opened.

[0036] When the screw cap B is rotated approximately 30° in the opening direction, as shown in Figure 4(c), the engagement between the inclined upper parts 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c and the lower inclined surface parts 8b of each lower screw protrusion 8, and the engagement between the inclined upper parts 17 of the upper cap screw protrusions 15d, 15a, 15b, and 15c and the lower inclined surface parts 6b of each upper screw protrusion 6 are completely released. Furthermore, when rotated in the opening direction, the upper inclined end portions 19b of the inclined upper portions 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c come into contact with the lower inclined portions 7b of the respective inclined screw protrusions 7, and the lower inclined end portions 18b of the flat lower portions 18 of the upper cap screw protrusions 15d, 15a, 15b, and 15c come into contact with the upper inclined portions 7a of the respective inclined screw protrusions 7, thereby lifting the screw cap B according to the respective inclinations.

[0037] When the screw cap B is rotated approximately 60° in the opening direction, the inclined upper portions 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c engage with the lower inclined surface portions 6b of the respective upper screw protrusions 6, as shown in Figure 4(b). With further rotation, the screw cap B is caused to slowly rise while sliding horizontally. When the screw cap B is rotated approximately 90° in the opening direction, the inclined upper portions 19 of the lower cap screw protrusions 16d, 16a, 16b, and 16c are disengaged from the lower inclined surface portions 6b of the respective upper screw protrusions 6, as shown in Figure 4(a). This disengages all the engagements that prevent the screw cap B from rising relative to the container body A, and the container body A is opened. Furthermore, when the screw cap B is rotated 90° or more in the opening direction, the lower inclined end portions 20b of the flat lower portions 20 of the lower cap screw protrusions 16a, 16b, 16c, and 16d of the screw cap B come into contact with the upper inclined portions 7a of the respective inclined screw protrusions 7, and the screw cap B is lifted as it is rotated, allowing it to be easily opened.

[0038] In the screw cap container of this embodiment, after filling the contents, if the internal pressure of the container body A increases due to a rise in temperature during storage, etc., the screw cap B will be pushed upward. However, when the container body is in the state between Figure 4(d) and Figure 4(b), where the container body is rotated less than 90° in the opening direction, the inclined upper portion 19 of the lower cap screw protrusions 16d, 16a, 16b, 16c of the screw cap B will abut against one of the undersides of the sloped screw portions 2a, 2b, 2c, 2d of the container body A, keeping the screw cap B horizontal and preventing it from rising, thereby preventing the screw cap B from slipping out upward.

[0039] The screw cap container of this embodiment can be opened and closed by rotating the screw cap B to the container body A by a minimum of approximately 90 degrees when opening and closing. Compared to conventional screw cap containers, this requires a smaller rotation angle and can be opened and closed more easily. Furthermore, when closing is completed or opening begins, the vibration protrusion 22 on the lower inner periphery of the outer wall 11 of the screw cap B overcomes the abutment protrusion 9 of the bead ring 3 of the mouth portion 1 of the container body A from above or below and vibrates, giving the user of the container a clicking sensation and informing them that closing is completed or opening has begun. Furthermore, even if the internal pressure of the container body A increases due to a rise in temperature during storage after the contents are filled and the screw cap B is pushed upward, the inclined upper portions 19 of the lower cap screw protrusions 16d, 16a, 16b, 16c of the screw cap B will abut evenly against any of the undersides of the sloped screw portions 2a, 2b, 2c, 2d of the container body A, preventing the screw cap B from slipping out upward.

[0040] In the above embodiment, the opening 1 of the container body A has four sloped threads 2 formed by an upper screw protrusion 6, an inclined screw protrusion 7, and a lower screw protrusion 8, each of which has an angular range of approximately 30° in the circumferential direction, protruding continuously at 90° intervals. The inner periphery of the outer wall 11 of the screw cap B has four upper cap screw protrusions 15 and four lower cap screw protrusions 16, each of which is also arranged at 90° intervals. However, even if two sloped threads 2 formed by an upper screw protrusion 6, an inclined screw protrusion 7, and a lower screw protrusion 8, each of which has an angular range of approximately 30° in the circumferential direction, protrude intermittently at 180° intervals, one of the two sloped threads 2 can engage with one of the upper cap screw protrusions 15 or the lower cap screw protrusions 16, each of which is arranged at four locations on the screw cap B at 90° intervals, allowing the screw cap B to be opened and closed with a small rotation angle.

[0041] Furthermore, even if four sloped thread portions 2 formed by inclined thread protrusions 7 and lower thread protrusions 8, each having the same circumferential angular range of approximately 30°, are protruded at 90° intervals, and two upper thread protrusions 6, each having a circumferential angular range of approximately 30°, are formed intermittently at 180° intervals from the upper end of the inclined thread protrusion 7, one of the two upper thread protrusions 6, each having a circumferential angular range of approximately 30°, engages with one of the upper cap thread protrusions 15 and lower cap thread protrusions 16, which are arranged at four locations on the screw cap B at 90° intervals, during opening and closing, the cap can be opened and closed with a small rotation angle.

[0042] As described above, in the screw cap of the present invention, the number of slope thread portion 2 on the nozzle portion 1 of container body A and the number of upper screw protrusions 6 constituting the slope thread portion 2 may be plural, and the intervals at which the slope thread portions 2 are arranged may be continuous or intermittent. Furthermore, the numbers of upper cap screw protrusions 15 and lower cap screw protrusions 16 on the inner circumference of the outer wall 11 of screw cap B may be set according to the number of threads and shape of the slope thread portion 2. Therefore, the number of slope thread portion 2 and the upper screw protrusions 6 constituting the slope thread portion 2, the intervals at which the slope thread portions 2 are arranged, and the numbers of upper cap screw protrusions 15 and lower cap screw protrusions 16 are not limited to those in the above embodiment.

[0043] Example 2 Next, a second embodiment in which a sealing function is added to the screw cap container of the first embodiment will be described. In the following, the same components as those in the first embodiment are given the same reference numerals, and new reference numerals are given to changed components, and the explanation will focus on the differences.

[0044] In FIG. 5, Aa is the container body and Ba is the screw cap. As shown in Figure 5, the container body Aa has a four-thread sloped screw portion 2 (2a, 2b, 2c, 2d) that screws onto the screw cap Ba, a bead ring 3 located below the sloped screw portion 2, a locking protrusion 30 located below the bead ring 3, and a neck ring 4 located below the locking protrusion 30 protruding from the outer periphery of the nozzle portion 1. The locking projection 30 is formed with a diameter larger than the outer diameter of the bead ring 3 and smaller than the diameter of the neck ring 4.

[0045] The screw cap Ba comprises a disk-shaped top wall 10 and a cylindrical outer wall 11 extending vertically from the outer edge of the top wall 10, and a vibration projection 22 is provided on the lower inner periphery of the outer wall 11. Furthermore, a sealing ring 35 is connected to the lower end of the outer peripheral wall 11 via a plurality of breakable weakened pieces 36 .

[0046] The inner circumference of the sealing ring 35 is larger than the outer diameter of the locking protrusion 30 of the container body Aa, and a locking protrusion 37 is protruded from the upper part of the inner circumference toward the inside, the inner diameter of which is smaller than the outer diameter of the locking protrusion 30 and which can be overcome.

[0047] Next, the manner of use and the effects of the screw cap container of this embodiment will be described. When the screw cap Ba is first closed, the screw cap Ba descends relative to the container body Aa, causing the locking protrusion 37 of the sealing ring 35 of the screw cap Ba to climb over the locking projection 30 of the container body Aa and be set below the locking projection 30, as shown in Figure 5(b), and the sealing ring 35 is attached covering the locking projection 30 of the container body Aa.

[0048] When the screw cap Ba is rotated during the initial opening of the screw cap Ba, the screw cap Ba rises relative to the container body Aa, causing the upper part of the locking protrusion 37 of the sealing ring 35 of the screw cap Ba to abut against the lower part of the locking protrusion 30 of the container body Aa, preventing the sealing ring 35 from rising relative to the container body Aa. Therefore, when the screw cap Ba rises, the weakened piece 36 between the sealing ring 35 and the outer wall 11 is broken, and as shown in Figure 6, the sealing ring 35 remains between the locking protrusion 30 of the container body Aa and the neck ring 4, and only the outer wall 11 of the screw cap Ba rises.

[0049] Once the lid is opened, even if the lid is closed again, whether or not the lid has been tampered with can be confirmed by observing from the outside the height of the sealing ring 35 and the state of the weakened piece 36 between the sealing ring 35 and the outer peripheral wall 11. Other functions and effects are the same as those of the first embodiment. [Industrial Applicability]

[0050] The screw cap container of the present invention, when closing the lid, keeps the screw cap horizontal to the container body when it is placed over the mouth of the container body, preventing it from being tilted, and allows the container to be easily sealed with a small rotation angle.When opening the lid, it can be easily opened with a small rotation angle, and gives the user a clicking sensation when opening and closing, letting them know the opening and closing status.Furthermore, after filling the contents, it can prevent the internal pressure of the container body from increasing due to a rise in temperature during storage, etc., which would push the screw cap upward and cause it to come off, and can be widely used as a screw cap container that can maintain a safely closed state. [Explanation of symbols]

[0051] A, Aa container body B, Ba screw cap Sections a, b, c, d α, γ width β, δ interval θ angle 1 Mouth barrel part 2(2a, 2b, 2c, 2d) Slope thread section 3 bead rings 4 neck rings 6 Upper screw protrusion 6a Upper flat surface part 6b, 8b Downward slope section 7 Inclined screw protrusion 7a Upper slope 7b Downward slope 8 Lower screw protrusion 8a Top part 9 Contact protrusion 10 Top wall 11 Peripheral wall 12 Inner sealed envelope section 13 Contact Ring 14 Knurling 15(15a, 15b, 15c, 15d) Upper cap screw protrusion 16(16a, 16b, 16c, 16d) Lower cap screw protrusion 17, 19 Sloped top 17a, 19a Upper slope 17b, 19b Upward sloped end 18, 20 flat bottom 18a, 20a Lower flat surface part 18b, 20b Downward slope end 22 Vibration protrusion 30 Locking protrusion 35 Sealing Ring 36 Weakening piece 37 Locking protrusion

Claims

1. A screw cap container comprising a container body and a screw cap that is screwed onto the mouth of the container body, The container body has a sloped threaded portion protruding from the outer periphery of the nozzle, and a contact protrusion protruding below the sloped threaded portion, The sloped threaded portion includes upper threaded protrusions arranged at a plurality of locations at equal intervals in the circumferential direction, lower threaded protrusions arranged parallel to and spaced a predetermined distance below the upper threaded protrusions, and an inclined threaded protrusion connected between the lower threaded protrusions and the upper threaded protrusions, The screw cap has a top wall and an outer peripheral wall depending from the outer edge of the top wall, The screw cap container is characterized in that the outer wall has upper cap screw protrusions arranged at multiple locations on the inner circumference at equal intervals and at the same height, lower cap screw protrusions arranged parallel to and below the upper cap screw protrusions at a predetermined distance, and vibration protrusions protruding below the lower cap screw protrusions and which overcome the abutting protrusions on the nozzle when the lid is closed.

2. The upper screw protrusion has an upper flat surface portion that is flat at the top and a lower inclined surface portion that is inclined at a predetermined angle toward the direction in which the lid rotates when closed, The lower screw protrusion has an upper surface portion at its upper part and a lower inclined surface portion at its lower part that is inclined at a predetermined angle toward the direction in which the lid rotates when closed, 2. The screw cap container according to claim 1, wherein the upper cap screw protrusion and the lower cap screw protrusion have an inclined upper portion that slopes downward in the direction of rotation when the lid is closed, and a flat lower portion that is flat.

3. The container body includes a locking projection that projects downward from the contact projection of the nozzle portion, 3. The screw cap container according to claim 1, wherein the screw cap has a sealing ring connected to the lower end of the outer peripheral wall via a breakable weakened piece and fitted onto the locking protrusion.

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