Screw ring and aerosol device

Abstract

To provide an easily detachable screw ring 13, which is difficult to rotate when a screw cap 15 is screwed onto a main body 11 of the metal container and to provide an aerosol device that makes it easy to separate the screw ring 13 or a valve 14 using the metal container body 11.SOLUTION: An aerosol device 10 includes: a synthetic resin screw ring 13 that is mounted on the outer circumference of a neck portion 12 of a container body 11, which has a male thread 13b formed on the outer surface and is equipped with a stop rib (a rib 13c) on the inner surface; the metal container body 11 with the neck portion 12 and a bead portion 11e; a valve 14 contained in the neck portion 12, which engages with the bead portion 11e of the container body 11 via a gasket 21; the screw ring 13; and a screw cap 15 that has a pressing portion 15f that presses against the periphery of a mounting cup 20, with a stop (a rib 13e, a groove 11f) provided between the screw ring 13 and the neck portion 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a screw ring that can be detachably attached to the neck of a metal container body to turn it into a threaded container, and to an aerosol device that uses the screw ring.In particular, the present invention relates to an aerosol device that can be disposed of after use by the consumer by removing the screw ring and valve and separating it from the metal container. [Background technology]

[0002] Patent Document 1 discloses a discharge container that includes a container body, a valve screwed onto the outer periphery of the mouth of the container body, and an inner container filled with concentrate, the inner container being connected so as to rotate together with the valve. Patent Document 2 also discloses a discharge container that includes a container body, a valve detachably attached to the mouth of the container body, and a pouch attached to the lower end of the housing of the valve, with a neck formed near the upper end of the pouch and shoulders extending diagonally downward to the left and right from the lower end of the neck.

[0003] In the discharge containers of Patent Documents 1 and 2, the valve is screwed onto the container body with a threaded cap, and when discarded after use, the valve can be removed from the container body by turning the cap, and the valve can be separated. Furthermore, the inner container integrated with the valve housing can also be removed and separated.

[0004] Patent Document 3 discloses a liquid filling container comprising a metal can having a body, a shoulder, and a narrow-diameter neck, and a screw ring fixed to the neck of the can. The screw ring is a hollow cylinder made of synthetic resin or the like, with a male thread formed on its outer periphery. This screw ring is fitted around the neck before the formation of the curl (bead), and is fixed to the can by bending the upper end of the neck radially outward to form the curl. Use of this screw ring provides the desired screwing strength.

[0005] Patent Document 4 discloses a test bottle for pressure-accumulating filling products, in which a valve is detachably attached, with the female threads of a cup-shaped lid screwed onto the male threads of the mouth of a pressure-resistant glass bottle or the like. Fig. 4 also discloses a configuration in which an annular support member (auxiliary member) with male threads on its outer periphery is fitted onto the neck of the bottle, a mounting cup is attached via an annular gasket, and the support member is fixed to the bottle with a female-threaded lid. The support member is an annular member with male threads on its outer wall, and one end on one diameter line is cut out (a slit), and the other end is hinged (a resin hinge).

[0006] Therefore, the support member can be attached and detached between the flange and shoulder of the upper end of the bottle by elastically expanding. The outer surface of the bottle is coated with a protective synthetic resin, which creates a large frictional force with the support member, eliminating the problem of free rotation when screwing the lid on. The lower end of the support member protrudes outward from the lower end of the lid, so this part can be gripped to stop the rotation of the support member. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2023-20727 [Patent Document 2] Japanese Patent Publication No. 2023-20728 [Patent Document 3] Japanese Patent Application Publication No. 9-118345 [Patent Document 4] Japanese Utility Model Application Publication No. 2-20955 Summary of the Invention [Problem to be solved by the invention]

[0008] The discharge containers of Patent Documents 1 and 2 allow the valve to be separated simply by removing the screw cap. Furthermore, because the container body is made of a synthetic resin such as polyethylene terephthalate and the threaded portion is formed by injection molding, the threaded portion can be easily formed as designed and can be made to have a threaded strength that will not loosen under the pressure (0.2 to 1.0 MPa) inside the discharge container. However, when the container body is made of metal, the threaded portion is formed by pressing a mold against the neck to deform it, resulting in a gently convex shape. Furthermore, if the container is screwed in too tightly, it will go over the threads, making it difficult to achieve the desired threaded strength.

[0009] The liquid-filled container of Patent Document 3, which combines a metal container with a synthetic resin screw ring, is difficult to separate because the two are integrated. The test bottle for pressure-accumulating filling products of Figure 4 of Patent Document 4 allows for the valve and support member to be separated, but if a protective coating is not provided, the support member rotates when the lid (cap) is removed, making separation cumbersome, such as by gripping the bottom end of the lid.

[0010] The technical objective of the present invention is to provide a screw ring that is easy to remove from a metal container and that does not easily rotate when a threaded fastener is screwed onto a male screw, and an aerosol device that allows the screw ring and valve to be easily separated from the metal container body. [Means for solving the problem]

[0011] The screw ring of the present invention is a screw ring 13 that can be detachably attached to the outer periphery of the neck 12 of a metal container body 11, and is characterized in that it has a male thread 13b formed on its outer periphery and a rotation stop (rib 13c, rough surface) on its inner periphery to prevent slippage in the rotational direction relative to the container body 11.

[0012] In such a screw ring 13, it is preferable that the anti-rotation feature (rib 13c) allows axial sliding relative to the container body 11. In this case, it is even more preferable that the anti-rotation feature is a rib 13c extending in the axial direction. The anti-rotation feature can also be configured with a roughened surface. Furthermore, it is preferable that a break portion 13e that is cut from the upper end face to the lower end is provided at one location in the circumferential direction, and that a bendable connecting portion 13f is provided on the opposite side of the break portion 13e.

[0013] The aerosol device 10, 10A of the present invention comprises a metal container body 11 having a cylindrical neck 12 and a bead portion 11e formed at the upper end of the neck 12, a valve 14 that is housed in the upper opening of the neck 12 and covers the bead portion 11e of the container body 11 via a gasket 21, a screw ring 13 made of synthetic resin that is removably attached to the neck 12 and has a male thread 13b on its outer surface, and a screw cap 15 that has a pressing portion 15f that presses the valve 14 and has a female thread 15a that screws into the male thread 13b of the screw ring 13, and is characterized in that a rotation stopper (groove 11f, rib 13c, rough surface) is provided between the inner surface of the screw ring 13 and the outer surface of the neck 12.

[0014] In such aerosol devices 10 and 10A, the anti-rotation device preferably comprises an axially extending uneven portion (groove 11f) formed on the outer peripheral surface of the neck and an axially extending rib 13c provided on the inner peripheral surface 13d of the screw ring 13. The anti-rotation device may also be constituted by a rough surface formed on either or both of the inner peripheral surface 13d of the screw ring 13 and the outer peripheral surface of the neck 12 of the container body 11. Furthermore, it is preferable that the screw ring 13 has a break portion 13e cut from the upper end face to the lower end at one location in the circumferential direction, and that a bendable connecting portion 13f is provided on the opposite side of the break portion 13e. It is also preferable that the container body 11 has a shoulder portion 11c below the neck 12, and that the vertical dimension H of the screw ring 13 is shorter than the length L of the neck 12. [Effects of the Invention]

[0015] The screw ring of the present invention can be detachably attached to the neck of a metal container body, making it easy to separate from the container body. Furthermore, since it is equipped with a rotation stopper to prevent slippage in the rotational direction, the screw ring does not spin freely when screwing in or out a threaded part such as a cap onto the male thread of the screw ring, making it easy to handle.

[0016] If the anti-rotation device allows axial sliding relative to the container body, the screw ring can be easily moved up and down along the neck, making it easy to attach and detach. If the anti-rotation device is a rib extending in the axial direction, it prevents slippage in the rotational direction while allowing axial movement. If the anti-rotation device has a rough surface, it is easy to process. If the screw ring has a break section cut from the top end face to the bottom end at one point around the circumference, and a bendable connecting section is provided on the opposite side of the break section, the screw ring can easily be expanded by external force. Therefore, it is easy to attach and detach even to necks that have a bead section at the top end.

[0017] In the aerosol device of the present invention, the screw ring is detachable from the neck of the container body, allowing the metal container body and the composite valve to be separated for easy recycling. Furthermore, the screw ring has a stopper, which prevents it from spinning freely when attaching or detaching the screw cap to or from the screw ring, making it easy to handle.

[0018] If the anti-rotation device consists of an axially extending uneven portion formed on the outer surface of the neck and an axially extending rib provided on the inner surface of the screw ring, the screw ring can be easily attached and detached, and the anti-rotation effect is reliable. If the anti-rotation device consists of a rough surface formed on either or both the inner surface of the screw ring and the outer surface of the neck of the container, processing is easy.

[0019] When a screw ring has a break portion cut from the top to the bottom at one location along its circumference and a flexible connecting portion on the opposite side, the screw ring easily expands when attached to a metal container body with a bead portion whose outer diameter is larger than the inner diameter of the screw ring, making it easier to attach. Furthermore, when a screw cap is screwed on, the gap between the break portions of the screw ring narrows, narrowing the inner diameter and tightening the neck. This further reduces free rotation of the screw ring. Furthermore, the screw ring is easy to remove after use and when sorting.

[0020] If the container body has a shoulder below the neck and the height of the screw ring is shorter than the neck, the lower end of the screw ring is not expanded by the shoulder of the container body. This prevents the screw ring from expanding and spinning freely when the screw cap is attached. Furthermore, because the screw ring moves up and down somewhat along the neck, a straight axial force is applied when the screw cap is screwed onto the screw ring and the rim and bead of the mounting cup are tightened. This allows the valve to be attached to the bead more airtightly. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view of a main part showing one embodiment of an aerosol device of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the container body of FIG. 1 with a portion thereof omitted. [Figure 3] 3A is a front view of the neck portion and its surroundings of the container body, and FIG. 3B is a cross-sectional view taken along line III-III in FIG. 3A. [Figure 4] 4A is a plan view of the screw ring, FIG. 4B is a cross-sectional view taken along line IV-IV in FIG. 4A, and FIG. 4C is a cross-sectional plan view showing the attachment state of the screw ring to the neck of the container body. [Figure 5] 5A and 5B are side views of the threaded ring as seen from the arrows Va and Vb in FIG. 4A. [Figure 6] 6A and 6B are a partial cutaway side view and a partial cutaway top view of the screw cap. [Figure 7]FIG. 7A is a cross-sectional view of a main part showing another embodiment of the aerosol device of the present invention, and FIG. 7B is an enlarged cross-sectional view taken along line VIII-VIII in FIG. 7A. DETAILED DESCRIPTION OF THE INVENTION

[0022] The aerosol device 10 in Fig. 1 comprises a cylindrical container body 11 with a bottom, a cylindrical screw ring 13 detachably attached to a neck 12 of the container body 11, a valve 14 housed in an upper end opening 12a of the neck 12, and a screw cap 15 screwed onto the screw ring 13. That is, in this aerosol device 10, a male thread is not directly formed on the neck 12 of the container body 11, but rather the male thread is indirectly formed on the neck 12 by attaching the screw ring 13, which has a male thread 13b formed on its outer periphery, to the neck 12. In Fig. 1, an ejection member 17 is attached to the stem 16 of the valve 14, and an overcap 18 that protects the ejection member 17 is attached to the screw cap 15.

[0023] Container body 11 is made of a thin metal plate such as aluminum or tinplate, and as shown in Fig. 2, it has a bottom 11a, a cylindrical body 11b, a tapered shoulder 11c continuing from the top of the bottom 11a, and a cylindrical neck 12 extending upward from the upper end of shoulder 11c. A bead 11e that curves outward is formed at the upper end of neck 12. The cross-sectional shape of bead 11e (longitudinal cross section of the container) is approximately circular.

[0024] The bead portion 11e has a substantially circular planar shape, and as shown in Fig. 3A, the outer diameter D1 of the bead portion 11e is larger than the outer diameter D2 of the neck portion 12. In other words, the bead portion 11e protrudes somewhat outward from the surface of the neck portion 12, and this step s is the portion with which the upper end surface of the thread ring 13 (reference numeral 13a in Fig. 2) engages.

[0025] As shown in Figure 2, the bead portion 11e protrudes somewhat inward from the inner surface of the neck portion 12. Such a bead portion 11e can be obtained by curling the upper portion of the neck portion 12 outward after forming the shoulder portion 11c and the cylindrical neck portion 12. Note that the upper portion of the cylindrical neck portion 12 may be drawn to a slightly smaller diameter before being curled. Furthermore, it is sufficient for the shoulder portion 11c to be able to hold the thread ring 13 so that it does not fall off when attached to the outer periphery of the neck 12.

[0026] As shown in Figures 2 and 3A, the neck portion 12 has a cylindrical small-diameter portion 12b immediately below the bead portion 11e and a large-diameter portion 12c below it. A smoothly continuous tapered portion 12d is formed between the small-diameter portion 12b and the large-diameter portion 12c. The small-diameter portion 12b is provided to smoothly form the bead portion 11e. A plurality of longitudinally (axially) extending grooves 11f are formed on the surface of the large-diameter portion 12c at equal intervals around the circumference. The grooves 11f extend from the large-diameter portion 12c to near the upper end of the shoulder portion 11c. As shown in Figure 3B, the area between adjacent grooves 11f can be considered as a convex portion, and the grooves 11f and the convex portions between them can also be interpreted as an uneven portion. The inner surface of the neck portion 12 corresponds to the grooves 11f and protrudes inward. In this embodiment, the bottoms of the grooves 11f are approximately flush with the surface of the small-diameter portion 12b (see Figure 2).

[0027] The grooves 11f are portions that engage with the ribs 13c of the screw ring 13, and therefore preferably have a rectangular or substantially trapezoidal cross section. However, they may also be arc-shaped. The grooves 11f are provided at equal intervals in the circumferential direction. The number of grooves 11f is approximately 2 to 12, preferably 4 to 8. These grooves 11f can be formed by placing an annular mold having rotors such as protrusions or balls on its inner surface around the neck portion 12, moving it downward along the neck portion 12, and then moving it upward to remove it. Therefore, the upper ends of the grooves 11f are open, allowing for easy installation of the screw ring 13. Since the grooves 11f extend inward from the outer circumferential surface of the bead portion 11e in a plan view, the bead portion 11e is formed after the grooves 11f are formed.

[0028] As shown in FIG. 4, the screw ring 13 is generally cylindrical, with a male thread 13b formed on its outer periphery and a rib 13c extending in the axial direction formed on its inner periphery. The rib 13c is the portion that engages with the groove 11f of the neck portion 12. The male thread 13b extends to the upper end of the screw ring 13. However, the upper end surface 13a of the screw ring 13 is flat and perpendicular to the central axis so as to evenly abut the bead portion 11e. The inner periphery 13d of the screw ring 13 has a larger diameter than the outer periphery of the neck portion 12 of the container body 11. Therefore, a gap is formed between the inner periphery 13d of the screw ring 13 and the outer periphery of the neck portion 12 except for the rib 13c (see FIG. 4C). In other words, the height of the rib 13c is greater than the depth of the groove 11f. This ensures reliable engagement between the rib 13c and the groove 11f. The vertical dimension H of the screw ring 13 is slightly shorter than the length of the neck 12, i.e., the dimension from the underside of the bead 11e to the upper end of the shoulder 11c (reference symbol L in Fig. 3A). Therefore, when the screw ring 13 is attached to the outer periphery of the neck 12, it is not pressed against the upper part of the shoulder 11c and does not expand.

[0029] As can be seen from Figures 4A, 5A, and 5B, a break portion 13e is formed at one location in the circumferential direction of the screw ring 13, cutting from the upper end surface 13a to the lower end. Furthermore, on the opposite side of the diameter from the break portion 13e, a notch 13g is formed, cutting from the upper surface halfway, leaving the connecting portion 13f. The notch 13g is formed so that the screw ring 13 can be easily bent at the connecting portion 13f, i.e., so that the connecting portion 13f acts as a hinge. The notch 13g can be formed at a location other than the opposite side of the break portion 13e, or can be formed in multiple locations. Instead of the notch 13g, a thin-walled portion, a groove, or a resin hinge can be formed from the upper end surface 13a to the lower end to facilitate bending.

[0030] The thread height h1 of the male screw 13b is preferably about 1 to 3 mm, and the thread pitch is preferably about 2 to 3 mm. The number of turns of the thread is preferably about 2 to 4 turns. The depth of the notch 13g is about 50 to 80% of the vertical dimension H of the screw ring 13. The bottom portion 13h of the screw ring 13 is thickened, and a tapered surface 13i is formed on the inside of the lower end. The tapered surface 13i is formed continuously to the lower end of the rib 13c.

[0031] When the screw ring 13 moves over the bead portion 11e, it elastically contracts and returns to its original shape. At this time, the rib 13c engages with the recessed groove 11f of the neck portion 12. Furthermore, since the vertical dimension of the screw ring 13 is shorter than that of the neck portion 12, when the screw ring 13 is attached to the outer surface of the neck, the screw ring 13 is not pressed against the upper part of the shoulder portion 11c and does not expand, maintaining the engagement between the rib 13c and the recessed groove 11f. Furthermore, when the valve 14 is placed over the bead portion 11e and the screw cap 15 is screwed onto the screw ring 13, the screw ring 13 is movable up and down. As the screw cap 15 is screwed, the screw ring 13 rises and securely engages with the underside of the bead portion 11e, uniformly compressing the gasket 21 and sealing the gap between the container body 11 and the valve 14. The male thread 13b of the screw ring 13 and the female thread 15a of the screw cap 15 may be tapered, with the upper portion being somewhat smaller in diameter. In this case, when the screw cap 15 is screwed onto the screw ring 13, the screw ring 13 contracts, and the engagement between the recessed groove 11f of the neck portion 12 and the rib 13c of the screw ring 13 becomes more secure.

[0032] 4B, the rib 13c does not extend all the way to the top end of the screw ring 13. This is to make it easier to remove the screw ring 13 from the container body 11. The screw ring 13 is made of a synthetic resin such as polyethylene terephthalate, polybutylene terephthalate, polyacetal, nylon, or polypropylene.

[0033] As shown in Figure 1, the valve 14 consists of a mounting cup 20 with a U-shaped cross-section covering portion 20a, a gasket 21 placed on the inner surface of the covering portion 20a, a cylindrical housing 22 with a bottom held by a housing holding portion 20b in the center of the mounting cup 20, a stem 16 accommodated within the housing 22 so as to be able to move freely up and down, a stem rubber 23 sandwiched between the housing 22 and the mounting cup 20, a spring 24 that urges the stem 16 upward, and a dip tube 25 connected to the lower end of the housing 22.

[0034] The mounting cup 20 is made of a thin metal plate such as aluminum, while the stem 16, housing 22, and dip tube 25 are made of synthetic resin. The spring 24 is made of a metal such as steel wire, and the gasket 21 and stem rubber 23 are made of synthetic rubber. This type of valve 14 is made of a composite material such as synthetic resin, metal, and rubber, and is known as an aerosol valve that is attached to a metal can. However, unlike typical aerosol valves, the mounting cup 20 is not crimped to the underside of the bead portion 11e, but extends straight downward. This allows the valve 14 to be freely attached and detached to the upper end of the neck of the container body 11.

[0035] As shown in FIG. 6, the screw cap 15 is cylindrical and has a bottom. It includes a peripheral wall 15b with an internal thread 15a that threadably engages with the external thread 13b of the screw ring 13, an upper cylindrical portion 15c provided on the upper portion of the peripheral wall 15b, and a shoulder 15d that connects the peripheral wall 15b and the upper cylindrical portion 15c. The inner peripheral surface of the upper cylindrical portion 15c is provided with a plurality of ribs 15e. The lower surfaces of the ribs 15e form pressing portions 15f that engage with the upper surface of the cover portion 20a of the valve 14 and press the gasket 21 when the screws are tightened. The lower inner peripheral surface of the shoulder 15d is formed with a recess 15g that fits with the outer peripheral surface of the cover portion 20a of the valve 14. The upper surface of the recess 15g is continuous with the pressing portion 15f.

[0036] The outer periphery of the lower end of the upper cylindrical portion 15c is provided with a circumferential groove 15h that engages with an engaging protrusion 18a at the lower end of the overcap 18. A thin ring portion 15i extends inward from the upper end of the upper cylindrical portion 15c to hide the mounting cup 20 of the valve 14 to improve appearance and to cover the gap between the injection member 17 and the screw cap 15 to protect the user's fingers, etc. The outer periphery of the peripheral wall portion 15b is formed with fine vertical grooves (knurling) to prevent slipping when turning with fingers.

[0037] 1 includes a stem mounting portion 17a attached to the stem 16, a nozzle 17b extending forward from the upper end of the stem mounting portion 17a, and a finger-pressing portion 17c provided at the upper end of the stem mounting portion 17a. An injection passage 17d is provided from the stem mounting portion 17a to the nozzle 17b.

[0038] Next, the assembly procedure for the aerosol device 10 of Fig. 1 will be described. First, as shown in Fig. 2, the screw ring 13 is placed above the container body 11, and the screw ring 13 is pushed into the neck portion 12 of the container body 11. At this time, the tapered surface 13i at the lower end of the screw ring abuts against the outer periphery of the upper surface of the bead portion 11e, causing the screw ring 13 to elastically expand. This allows the screw ring 13 to climb over the bead portion 11e.

[0039] When the screw ring 13 moves over the bead portion 11e, the screw ring 13 elastically contracts, and the upper end surface 13a of the screw ring 13 comes below the bead portion 11e. At this point, the rib 13c of the screw ring 13 fits into the recessed groove 11f in the neck portion 12 of the container body 11 (see imaginary lines in Figure 2 and Figure 4C). Because the vertical dimension H of the screw ring 13 is shorter than the vertical dimension L of the neck portion 12, the screw ring 13 can move up and down to some extent.

[0040] Next, the container body 11 is filled with the concentrate. The valve 14 is then placed in the top opening 12a of the container body 11, and the peripheral cover portion 20a of the mounting cup 20 is placed over the bead portion 11e of the container body 11 (see Figures 5A and 5B). In this state, the gasket 21 is not sufficiently pressed, and the sealing action is insufficient. The concentrate is not particularly limited, and may be an aqueous solvent such as water or alcohol, or an oily solvent such as hydrocarbon oil or ester oil, to which an active ingredient has been added depending on the application or purpose.

[0041] Next, the screw cap 15 is screwed onto the screw ring 13. At this time, the rib 13c of the screw ring 13 is engaged with the groove 11f of the neck 12, preventing the screw ring 13 from spinning freely. Then, before the pressing portion 15f of the screw cap 15 firmly abuts against the upper end of the cap portion 20a, or while the valve 14 is slightly raised, the propellant (pressurized agent) is filled into the container body 11. The filler abuts against the shoulder portion 11c of the container body 11, filling the interior with propellant, passing it through gaps in the threads and through the gap between the bead portion 11e and the cap portion 20a. The upper opening of the screw cap 15 is left closed. The propellant can also be filled through the stem 16 after the aerosol device 10 has been assembled.

[0042] The propellant may be a compressed gas such as nitrogen, carbon dioxide, nitrous oxide, compressed air, or argon, or a liquefied gas such as liquefied petroleum gas, dimethyl ether, or hydrofluoroolefin. Compressed gas is preferably used because it can be safely discharged when the screw cap 15 is opened.

[0043] After the propellant is completely filled, the screw cap 15 is fully screwed onto the screw ring 13. As the screwing progresses, the screw ring 13 is pulled up, and its upper end surface 13a abuts against the lower part of the bead portion 11e, fixing the position of the screw ring 13. Further screwing of the screw cap 15 causes the pressing portion 15f, which is the lower end of the rib 15e on the inner surface of the screw cap 15, to press downward on the cover portion 20a of the mounting cup 20, compressing the gasket 21 and achieving a sealing effect. Since the rib 13c of the screw ring 13 and the recessed groove 11f of the container body 11 are engaged, the screw ring 13 does not tilt, and the gasket 21 is compressed evenly around the circumference. Furthermore, because the vertical dimension H of the screw ring 13 is shorter than the length L of the neck portion 12, the screw ring 13 is free to move up and down. This also contributes to the even compression of the gasket 21.

[0044] After filling with propellant and attaching the screw cap 15, the assembly process is completed by attaching an appropriate spray member 17 corresponding to the spray mode to the stem 16 of the valve 14 and then attaching the overcap 18. The consumer can spray the concentrate and propellant from the nozzle 17b by removing the overcap 18 and pushing in the spray member 17.

[0045] When disposing of the aerosol device 10 after use, the consumer removes the overcap 18 and the spray member 17, and then unscrews and removes the screw cap 15. When removing the screw cap 15, the compression of the gasket 21 is released while the threads remain engaged. Therefore, even if any propellant (pressurizing agent) remains, the propellant is released to the outside. This allows the consumer to safely remove the screw cap.

[0046] After removing the screw cap 15, the valve 14 is removed, and then the screw ring 13 is pulled out from the container body 11. This allows the metal container body 11, the synthetic resin screw cap 15, the composite material valve 14, and the screw ring 13 to be separated, making recycling easy.

[0047] The aerosol device 10A shown in Fig. 7A accommodates a pouch 26 in which the concentrate (contents) is filled within the container body 11. A propellant (pressurizing agent) is filled in the space between the pouch 26 and the container body 11. The pouch 26 is made up of a pouch body 27 formed by heat-welding the peripheries of two sheets of synthetic resin or metal layers or a laminate of these layers, and a tubular connecting member 28 welded to the upper end of the pouch body 27. The upper part of the connecting member 28 is connected to the tubular portion at the lower end of the housing 22 of the valve 14, and the lower part is welded between the two sheets of the pouch body 27.

[0048] Because pouch body 27 is generally rectangular, when it is placed in container body 11, which has shoulder 11c, the vicinity of upper corner 27a comes into contact with shoulder 11c and bends. Therefore, when screw cap 15 is screwed onto screw ring 13, valve 14 rotates along with screw cap 15, causing pouch 26 to twist and placing a load on welded portion 27b between connecting member 28 and pouch body 27. For this reason, in this aerosol device 10A, as shown in FIG. 7B, multiple, preferably 4 to 12, retaining ribs 30 are provided at the points where screw cap 15 abuts against the outer circumferential surface of cover portion 20a (see FIG. 7B). The thickness t of retaining ribs 30 is approximately 0.5 to 2 mm, the inward protruding height h is approximately 0.5 to 1.5 mm, and the vertical height is approximately 1 / 2 to 2 / 3 of the diameter of bead portion 11e.

[0049] This reduces friction between the retaining rib 30 and the covering portion 20a when the screw cap 15 is rotated, allowing it to slide and making it difficult for rotational force to be transmitted to the mounting cup 20. This prevents rotation while maintaining the posture of the mounting cup 20, allowing the gasket 21 to be compressed evenly. Co-rotation of the pouch 26 is also prevented, preventing excessive load from being applied to the welded portion 27b between the pouch body 27 and the connecting member 28. Other parts are the same as those of the aerosol device 10 in Figure 1, so the same reference numerals are used in the drawing and their description is omitted.

[0050] While the above describes preferred embodiments of the screw ring and aerosol device of the present invention, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the screw ring 13 is prevented from turning by the rib 13c on its inner surface and the groove 11f in the neck 12 of the container body 11, but a rough surface may be provided on either or both surfaces.

[0051] 7 employs a pouch 26 having a pouch body 27 formed of a single layer of two synthetic resin or metal layers or a laminated sheet of these as the inner container for filling the concentrate, but it is also possible to employ a thin-walled container made of synthetic resin formed into a predetermined shape by blow molding, etc. Such a thin-walled container can be held within the container body 11 by providing a flange at the upper end and sandwiching the flange between the bead portion 11e and the gasket 21. [Explanation of symbols]

[0052] 10, 10A Aerosol Device 11 Container body 11a bottom 11b Torso 11c Shoulder 11e Bead part 11f Concave groove 12 Neck L Neck length 12a Top opening 12b Small diameter section 12c large diameter section 12d tapered section 13 Retaining ring 13a Upper end surface of retaining ring 13b Male thread 13c Rib 13d Inner surface 13e Breaking part 13f Connecting part 13g notch 13h hem 13i Tapered surface H Vertical dimension of the screw ring (height) h1 Thread height 14 Valves 15 screw cap 15a female thread 15b Peripheral wall part 15c Upper cylinder part 15d Shoulder 15e Rib 15f Pressing part 15g recess 15h circumferential groove 15i ring part 16 Stem 17 Injection member 17a Stem mounting part 17b nozzle 17c Finger press 17d injection passage 18 Overcap 18a Engaging protrusion D1 Outer diameter of flat shape of bead part D2 Neck outer diameter s Step 20 Mounting Cup 20a Cover 20b Housing holding part 21 Gasket 22 Housing 23 Stem Rubber 24 Spring 25 Dip Tube 26 pouches 27 Pouch body 27a Near the top corner of the pouch body 27b Welded part 28 Connecting member 30 Retaining rib t Retaining rib thickness h Protruding height of the retaining rib

Claims

1. A synthetic resin screw ring that can be detachably attached to the outer periphery of the neck of a metal container body, A male thread is formed on the outer surface, The inner circumferential surface is provided with a rotation stopper to prevent slippage in the rotation direction relative to the container body. Screw ring.

2. 2. The threaded ring of claim 1, wherein the detent allows axial sliding relative to the container body.

3. 3. The threaded ring according to claim 2, wherein the anti-rotation device is a rib extending in the axial direction.

4. 2. The threaded ring according to claim 1, wherein the anti-rotation surface is roughened.

5. 2. The threaded ring according to claim 1, wherein a break portion extending from the upper end face to the lower end is provided at one location in the circumferential direction, and a bendable connecting portion is provided on the opposite side of the break portion.

6. a metal container body having a cylindrical neck and a bead portion formed on the upper end of the neck; a valve that is accommodated in the upper end opening of the neck portion and that covers the bead portion of the container body via a gasket; a synthetic resin screw ring that is detachably attached to the neck portion and has a male thread on its outer circumferential surface; a screw cap having a pressing portion that presses the valve and an internal thread that screws into the external thread of the screw ring; A stopper is provided between the inner peripheral surface of the screw ring and the outer peripheral surface of the neck. Aerosol device.

7. The rotation stopper comprises an axially extending uneven portion formed on the outer peripheral surface of the neck portion and an axially extending rib provided on the inner peripheral surface of the screw ring.

7. The aerosol device according to claim 6.

8. The rotation stopper is configured by a rough surface formed on either or both of the inner peripheral surface of the screw ring and the outer peripheral surface of the neck portion of the container body.

7. The aerosol device according to claim 6.

9. a breaking portion cut from the upper end face to the lower end is provided at one location in the circumferential direction of the screw ring, and a bendable connecting portion is provided on the opposite side of the breaking portion; 7. The aerosol device according to claim 6.

10. The container body has a shoulder below the neck, and the vertical dimension of the screw ring is shorter than the length of the neck.

7. The aerosol device according to claim 6.

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