Container with cap

Abstract

To provide a container with a cap capable of enhancing the fastening torque of a cap with respect to a mouth part.SOLUTION: A container 1 with a cap includes: a container body 10 having a cylindrical mouth part 11 including a male screw 13 on an outer peripheral surface; and a cap 20 including a female screw 23 on an inner peripheral surface, and mounted on the mouth part 11 by screw-coupling the female screw 23 to the male screw 13. The container 1 with a cap includes: a stopper protrusion 15 provided extending downward from a terminal end 13b of the male screw 13, on the outer peripheral surface of the mouth part 11; and a support protrusion 16 provided extending in the circumferential direction from the stopper protrusion 15 on the outer peripheral surface of the mouth part 11, and arranged below the male screw 13. When the cap 20 is screwed in the mouth part 11 to a predetermined rotation position, a starting end 23a of the female screw 23 comes into contact with the stopper protrusion 15, and is held between the male screw 13 and the support protrusion 16.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a capped container having a cap attached to the mouth of a container body. [Background technology]

[0002] For example, as a container for storing contents such as cosmetics or liquid detergent, a capped container is known which has a container body with a cylindrical mouth portion with a male thread on the outer peripheral surface, and a cap with a female thread on the inner peripheral surface which is attached to the mouth portion by threading the female thread onto the male thread.

[0003] A known example of such a capped container is one in which a stopper protrusion extending downward from the end of the male thread is provided on the outer peripheral surface of the mouth, and when the cap is screwed into the mouth to a predetermined rotational position, the starting end of the female thread abuts against the stopper protrusion, thereby allowing the cap screwed into the mouth to be stopped at a predetermined rotational position relative to the mouth (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 53-025848 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional capped containers, for example, when the tightening torque of the cap on the mouth is increased to ensure a tight seal, the start of the female thread abutting the stopper protrusion may not be able to withstand the tightening torque and may deform downward along the stopper protrusion, overriding the stopper protrusion. In particular, in containers made of polyethylene terephthalate and with softer caps made of polyethylene or polypropylene, the female thread is more likely to deform and overridden the stopper protrusion. Therefore, conventional capped containers have the problem that the tightening torque of the cap on the mouth of the container body may not be sufficiently increased.

[0006] The present invention was developed to solve these problems, and its object is to provide a capped container that allows for an increased tightening torque of the cap relative to the opening. [Means for solving the problem]

[0007] The capped container of the present invention is a capped container comprising: a container body having a cylindrical mouth portion with a male thread on its outer peripheral surface; and a cap having a female thread on its inner peripheral surface and attached to the mouth portion by threadingly engaging the female thread with the male thread, wherein the cap has a stopper protrusion provided on the outer peripheral surface of the mouth portion and extending downward from the end of the male thread, and a support protrusion provided on the outer peripheral surface of the mouth portion and extending circumferentially from the stopper protrusion and positioned below the male thread, and is configured so that when the cap is screwed into the mouth portion to a predetermined rotational position, the starting end of the female thread abuts against the stopper protrusion and is sandwiched between the male thread and the support protrusion. The support projection extends in the circumferential direction at a lead angle smaller than that of the male screw. It is characterized by the presence of

[0010] In the capped container of the present invention, in the above configuration, it is preferable that the starting end of the female thread is a plane perpendicular to the circumferential direction of the inner surface, and the portion of the stopper protrusion that abuts against the starting end of the female thread is a plane perpendicular to the circumferential direction of the outer surface.

[0011] In the capped container of the present invention having the above-described configuration, it is preferable that the cap is formed of a material that is softer than the material forming the container body. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a capped container that allows for an increased tightening torque of the cap relative to the opening. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view of a capped container according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view of the container body shown in FIG. [Figure 3] 2 is an enlarged cross-sectional view of the engaging portion between the mouth and the cap of the capped container shown in FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A capped container 1 according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[0015] As shown in FIG. 1, the capped container 1 has a container body 10 and a cap 20.

[0016] In this specification and claims, "upper" means upper when the capped container 1 is in the upright position shown in Figure 1 (the position in which the cap 20 is positioned above the container body 10), and "lower" means the opposite.

[0017] 2, the container body 10 is bottle-shaped and has a cylindrical mouth 11 and a body 12 that is integrally connected to the lower end of the mouth 11. The body 12 can be formed, for example, in the shape of a cylinder with a bottom, but the shape can be modified in various ways.

[0018] A male thread 13 is integrally formed on the outer peripheral surface of the mouth portion 11. The male thread 13 extends continuously in a spiral shape with a predetermined lead angle on the outer peripheral surface of the mouth portion 11 between a starting point 13a on the upper side (the side where screwing begins) and a terminal point 13b on the lower side (the side where screwing ends).

[0019] In this embodiment, the male thread 13 is a buttress thread in which the flank angle of the flank facing upward is larger than the flank angle of the flank facing downward, but the shape thereof can be modified in various ways.

[0020] A configuration may be adopted in which an annular neck ring 14 is provided on the outer peripheral surface of the mouth portion 11 and positioned below the male thread 13.

[0021] The container body 10 having the above-described structure can be formed by, for example, blow molding or injection molding of a synthetic resin material.

[0022] As shown in FIG. 1, the cap 20 is cylindrical and has a cylindrical side wall 21 with a diameter larger than that of the mouth 11 and a top wall 22 that is integrally connected to the upper end of the side wall 21.

[0023] 3, a female thread 23 is integrally formed on the inner peripheral surface of the side wall 21. The female thread 23 extends continuously in a spiral shape on the inner peripheral surface of the side wall 21 between a starting point 23a on the lower side and a terminal point (not shown) on the upper side, with the same lead angle as the male thread 13. The female thread 23 can be threadably coupled to the male thread 13, and the cap 20 is attached to the mouth portion 11 by threading the female thread 23 to the male thread 13.

[0024] In this embodiment, the female thread 23 is a sawtooth thread in which the flank angle of the flank facing downward is larger than the flank angle of the flank facing upward, corresponding to the male thread 13, but its shape can be modified in various ways.

[0025] A cylindrical seal portion 24 that fits into the inner peripheral surface of the mouth portion 11 may be integrally formed on the lower surface of the top wall 22 .

[0026] The cap 20 having the above-described structure can be formed by, for example, injection molding a synthetic resin material.

[0027] As shown in FIGS. 2 and 3, a stopper projection 15 and a support projection 16 are provided on the outer peripheral surface of the mouth portion 11.

[0028] The stopper protrusion 15 is a rectangular block-like member that protrudes radially outward from the outer peripheral surface of the mouth portion 11, and is continuous with and extends downward from the terminal end 13b of the male thread 13. The stopper protrusion 15 is located on the path of movement in the screwing direction of the female thread 23 that is screwed onto the male thread 13. Therefore, when the female thread 23 is screwed onto the male thread 13 and the cap 20 is screwed into the mouth portion 11 to a predetermined rotational position, the starting end 23a of the female thread 23 abuts against the locking surface 15a of the stopper protrusion 15 (see FIG. 2). When the starting end 23a of the female thread 23 abuts against the locking surface 15a of the stopper protrusion 15, rotation of the cap 20 relative to the mouth portion 11 is prevented, and the cap 20 stops at the predetermined rotational position relative to the mouth portion 11. In this way, when the cap 20 is screwed into the mouth portion 11 to a predetermined rotational position, the starting end 23a of the female thread 23 abuts against the stopper protrusion 15, thereby stopping the cap 20 at a predetermined rotational position relative to the mouth portion 11.

[0029] The support protrusion 16 protrudes radially outward from the outer peripheral surface of the mouth portion 11, and extends circumferentially from the stopper protrusion 15. The direction in which the support protrusion 16 extends relative to the stopper protrusion 15 is the same as the direction in which the male thread 13 extends relative to the stopper protrusion 15, and the support protrusion 16 is disposed below the portion of the male thread 13 on the side of the terminal end 13b.

[0030] In this embodiment, the support protrusion 16 is formed in the shape of a buttress thread, similar to the male thread 13. The circumferential length of the support protrusion 16 is equal to or shorter than the circumferential length of the outer peripheral surface of the mouth portion 11.

[0031] The vertical distance between the male screw 13 and the support protrusion 16 is such that the female screw 23 can be disposed therein. Furthermore, the vertical distance between the male screw 13 and the support protrusion 16 at the connection portion with the stopper protrusion 15 is equal to the vertical width of the start end 23a of the female screw 23. As a result, when the cap 20 is screwed into the opening 11 to a predetermined rotation position and the start end 23a of the female screw 23 abuts against the stopper protrusion 15, the start end 23a of the female screw 23 is sandwiched between the male screw 13 and the support protrusion 16, as shown in FIG. 3 .

[0032] As described above, in the capped container 1 of this embodiment, the outer peripheral surface of the mouth 11 is provided with a stopper protrusion 15 extending downward from the terminal end 13b of the male thread 13, so that the cap 20 screwed onto the mouth 11 can be stopped at a predetermined rotational position relative to the mouth 11. Furthermore, the outer peripheral surface of the mouth 11 is provided with a support protrusion 16 extending circumferentially from the stopper protrusion 15 and positioned below the male thread 13, so that when the cap 20 is screwed onto the mouth 11 to a predetermined rotational position, the start end 23a of the female thread 23 abuts against the stopper protrusion 15 and is sandwiched between the male thread 13 and the support protrusion 16. Therefore, even if a tightening torque is further applied to the cap 20 after the start end 23a of the female thread 23 abuts against the stopper protrusion 15, the start end 23a of the female thread 23 to which the tightening torque has been applied is sandwiched between the male thread 13 and the support protrusion 16, preventing deformation. This prevents the female thread 23 from climbing over the stopper protrusion 15, thereby increasing the tightening torque of the cap 20 relative to the mouth 11. That is, the stopper protrusion 15 and the support protrusion 16 form a U-shaped stopper at the end 13b of the male thread 13 that supports the starting end 23a of the female thread 23, thereby reliably preventing the female thread 23 from climbing over the stopper protrusion 15. In this way, the capped container 1 of this embodiment can provide a capped container 1 that can increase the tightening torque of the cap 20 relative to the mouth 11.

[0033] The support protrusions 16 can be configured to extend in the circumferential direction at a lead angle smaller than that of the male thread 13. In this case, for example, the lead angle of the male thread 13 can be set to 3 degrees and the lead angle of the support protrusions 16 can be set to 2 degrees, but these lead angles can be changed in various ways depending on the required tightening torque, etc. By configuring the support protrusions 16 to extend in the circumferential direction at a lead angle smaller than that of the male thread 13 in this way, it is possible to configure the vertical distance between the male thread 13 and the support protrusions 16 to be smallest at the connection portion with the stopper protrusion 15 and to increase as the distance from the stopper protrusion 15 increases. This prevents the start end 23a of the female thread 23 from getting caught on the circumferential end of the support protrusion 16 when the cap 20 is screwed into the mouth portion 11 to a predetermined rotation position, and prevents the start end 23a of the female thread 23 from being pinched between the male thread 13 and the support protrusion 16 until the cap 20 reaches the predetermined rotation position of the mouth portion 11, thereby preventing large sliding resistance from occurring in the female thread 23 between the male thread 13 and the support protrusion 16 during the tightening operation. This makes it possible to easily tighten the cap 20 onto the mouth portion 11.

[0034] The support protrusions 16 can also be configured to extend circumferentially at the same lead angle as the male thread 13. With this configuration, when the cap 20 is screwed into the mouth portion 11 to a predetermined rotational position and the start end 23a of the female thread 23 abuts against the stopper protrusion 15, a portion of the female thread 23 from the start end 23a to a predetermined length corresponding to the circumferential length of the support protrusions 16 is clamped between the male thread 13 and the support protrusions 16, more reliably suppressing deformation of the portion of the female thread 23 on the start end 23a side. This makes it possible to further increase the tightening torque of the cap 20 to the mouth portion 11.

[0035] The capped container 1 can be configured such that the start end 23a of the female thread 23 is a plane perpendicular to the circumferential direction of the inner peripheral surface of the side wall 21, and the locking surface 15a of the stopper protrusion 15 that abuts against the start end 23a of the female thread 23 is a plane perpendicular to the circumferential direction of the outer peripheral surface of the mouth portion 11. With this configuration, when the cap 20 is screwed into the mouth portion 11 to a predetermined rotational position, the start end 23a of the female thread 23 and the locking surface 15a of the stopper protrusion 15 come into surface contact with each other. Therefore, when the cap 20 is screwed into the mouth portion 11 to a predetermined rotational position and the start end 23a of the female thread 23 abuts against the locking surface 15a of the stopper protrusion 15, application of force from the locking surface 15a of the stopper protrusion 15 to the start end 23a of the female thread 23 in a radially outward or vertical direction is suppressed, and the start end 23a of the female thread 23 can be more reliably supported by the stopper protrusion 15. This more effectively prevents the female thread 23 from being unable to withstand the tightening torque and becoming deformed, causing it to overcome the stopper protrusion 15, thereby further increasing the tightening torque of the cap 20 relative to the mouth 11 of the container body 10.

[0036] The capped container 1 may be configured such that the cap 20 is made of a material softer than the material forming the container body 10. For example, in this embodiment, the container body 10 is made of polyethylene terephthalate, and the cap 20 is made of polypropylene, a material softer than the polyethylene terephthalate forming the container body 10. By using a cap 20 made of a material softer than the material forming the container body 10 in this manner, the sealing performance of the cap 20 around the mouth 11, such as in the cylindrical seal portion 24, can be improved. Furthermore, according to the capped container 1 of this embodiment, even in this configuration, the internal thread 23, which is made of a material softer than the container body 10, is prevented from climbing over the stopper protrusion 15, thereby increasing the tightening torque of the cap 20 against the mouth 11 of the container body 10.

[0037] The present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit and scope of the present invention.

[0038] For example, in the above embodiment, the stopper protrusion 15 is in the shape of a rectangular block, but this is not limited to this, and the shape can be modified in various ways as long as it is a shape that can engage the starting end 23a of the female thread 23 and prevent rotation of the cap 20.

[0039] In the above embodiment, the container body 10 is made of polyethylene terephthalate and the cap 20 is made of polypropylene, but the materials from which the container body 10 and the cap 20 are made can be changed in various ways.

[0040] Furthermore, in the above embodiment, the support protrusions 16 are configured to extend at an inclination in the circumferential direction with a lead angle along the outer peripheral surface of the mouth portion 11, but they may also be configured to extend in the circumferential direction along the outer peripheral surface of the mouth portion 11 without a lead angle. The shape of the support protrusions 16 is not limited to the shape of a buttress thread and can be modified in various ways. [Explanation of symbols]

[0041] 1 container with cap 10 Container body 11 Mouth 12 Torso 13 Male thread 13a Beginning 13b Termination 14 Neck Ring 15 Stopper protrusion 15a Locking surface 16 Support protrusion 20 Caps 21 Side wall 22 Top wall 23 Internal thread 23a Beginning 24 Seal cylinder

Claims

1. a container body having a cylindrical mouth portion provided with a male thread on its outer circumferential surface; A cap having a female thread on an inner circumferential surface, the female thread being threadably coupled to the male thread and attached to the opening, a stopper projection provided on the outer peripheral surface of the mouth portion and extending downward from the end of the male screw; a support projection provided on an outer peripheral surface of the mouth portion, extending circumferentially from the stopper projection, and positioned below the male screw; When the cap is screwed onto the opening portion to a predetermined rotational position, the start end of the female screw abuts against the stopper projection and is sandwiched between the male screw and the support projection, A capped container, wherein the support projection extends in the circumferential direction at a lead angle smaller than that of the male thread.

2. The starting end of the female thread is a plane perpendicular to the circumferential direction of the inner circumferential surface, 2. The capped container according to claim 1, wherein a portion of the stopper projection that abuts against the starting end of the female screw is a flat surface that is perpendicular to the circumferential direction of the outer circumferential surface.

3. 3. The capped container according to claim 1, wherein the cap is made of a material softer than a material forming the container body.

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