JP2018188180A - Discharge container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge container in which flying-away of a screw cap can be suppressed even in a case of being kept for a long time at high temperature.SOLUTION: Provided is a discharge container 1 which comprises a container body 11 for filling undiluted solution C and a pressurizing agent P and a valve assembly 12. At the mouth part 11e outer periphery of the container body 11, formed are a screw part 11f, and an O-ring holding part 11g which holds an O-ring 13 below the screw part 11f. The valve assembly 12 comprises a screw cap 15, the screw cap 15 comprises a tubular part 15a in which formed is a screw part 15d engaging with the screw part 11f of the container body 11, and, at the tubular part 15a, a seal surface 15e for pressing the an O-ring 13 in the horizontal direction is formed below the screw part 15d, and the screw thread width W1 of the screw cap 15 is made as 50 to 90% against the distance W2 between screw threads of the container body 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a discharge container for filling a stock solution and a pressurizing agent, and particularly to a discharge container in which a mouth of a container body is closed with a screw cap.

  Patent Document 1 discloses that in an aerosol product in which a container body is filled with an undiluted solution and a pressurizing agent, the mouth portion of the container body is closed with a cap with a screw (screw cap). The screw cap is fixed to the container main body by screwing a screw portion provided on the inner periphery of its own skirt portion with a screw portion provided on the outer periphery of the neck portion of the container main body. In addition, an O-ring held on the outer periphery of the neck portion of the container body is pressed in the horizontal direction by a vertical inner surface provided below the threaded portion to form a seal with the container body.

JP 2017-013796 A

  By the way, if the container main body and the screw cap are made of a synthetic resin as in the multilayer bottle product of Patent Document 1, the material strength is remarkably lowered as the temperature rises. Therefore, when stored at a high temperature for a long period of time, there is a possibility that the tip of the thread will bend and deform, and the threads will be disengaged and the valve assembly will come off.

  Accordingly, an object of the present invention is to provide a discharge container that can prevent the screw cap from coming off even when stored at high temperature.

  In order to solve the above problems, the discharge container of the present application is a discharge container including container bodies 11 and 22 for filling the stock solution C and the pressurizing agent P, and valve assemblies 12 and 25 attached to the container bodies 11 and 22. The container is formed with a screw part 11f and an O-ring holding part 11g for holding the O-ring 13 below the screw part 11f on the outer periphery of the neck part 11d of the container main bodies 11 and 22, and the valve assemblies 12 and 25 are The valve mechanism 14 and the screw cap 15 are provided, and the screw cap 15 includes a cylindrical portion 15a in which a screw portion 15d that engages with the screw portion 11f of the container main bodies 11 and 22 is formed. A seal surface 15e for pressing the O-ring 13 held by the O-ring holding portion 11g in the horizontal direction is formed below the screw portion 15d on the screw cap 15a. Width W1 of the thread of the 5, characterized in that for the distance W2 between the threads of the container body 11 and 22 is 50 to 90%.

  The thread of the screw cap 15 is preferably engaged with the thread of the threaded portion 11f of the container body 11, 22 by 50 to 90% of the thread height H2 of the threaded portion 11f of the container body 11, 22. .

  The cross section of the screw portion 15d of the screw cap 15 is preferably substantially trapezoidal.

  The interval S1 between the seal surface 15e and the outermost part of the O-ring holding portion 11g is the same as or larger than the interval S2 between the seal surface 15e and the top of the thread of the screw portion 11f of the container body 11, 22. It is preferable.

  The container body 22 is a double bottle comprising an inner bottle 24 filled with the stock solution C and an outer bottle 23 filled with the pressurizing agent P between the inner bottles 24, and the inner surface of the mouth 24 e of the inner bottle 24 An inner O-ring 30 is preferably provided between the valve mechanism 14 and the valve mechanism 14.

  The container body 22 is a double bottle comprising an inner bottle 24 filled with the pressurizing agent P and an outer bottle 23 filled with the stock solution C between the inner bottle 24, the top surface of the inner bottle 24 and the valve It is preferable to provide a sealing material 32 between the mechanism 14.

  In the discharge container of the present invention, the width of the screw cap thread is sufficiently secured to be 50 to 90% with respect to the distance between the screw threads of the container body. The bending of the thread can be suppressed, and the engagement between the threads can be maintained. On the other hand, the width of the screw cap thread is set so that a gap is formed between the screw cap screw thread and the container body screw thread. When raised, the screw cap can be tilted with respect to the container body, and the horizontal compression of the O-ring by the sealing surface is made uneven, that is, the force pressing the seal is varied in the circumferential direction, specifically Can weaken the seal pressing force on the side opposite to the inclined side of the screw cap, and can release the pressurizing agent. Accordingly, the screw cap can be prevented from coming off even when stored at a high temperature.

  If the thread of the screw cap is engaged by 50 to 90% with respect to the height of the thread of the container body, the frictional force at the engaging portion between the threads will be increased, and the screw cap will be moved early ( Inclination can be suppressed by a slight decrease in strength or a slight increase in pressure of the threaded portion. On the other hand, since the full length of the thread is not engaged and “play” is provided, the pressure cap can be released by tilting the screw cap before the screw cap comes off.

  If the cross section of the screw portion of the screw cap is substantially trapezoidal, it is easy to ensure a gap for tilting the screw cap between the screw portion of the container body.

  When the gap between the sealing surface and the outermost part of the O-ring holding part is the same as or larger than the gap between the sealing surface and the top of the thread of the threaded part of the container body, the screw cap is inclined. The contact between the sealing surface of the container and the container body can be delayed or not required, and the screw cap can be easily tilted.

  The container body is a double bottle comprising an inner bottle filled with a stock solution and an outer bottle filled with a pressurizing agent between the inner bottle and the inner side between the inner surface of the mouth of the inner bottle and the valve mechanism. If the O-ring is provided, the seal between the inner bottle and the valve mechanism can be maintained even when the screw cap is tilted and the pressurizing agent is released to the outside, and the stock solution in the inner bottle leaks out. There is nothing.

  The container body is a double bottle comprising an inner bottle filled with a pressurizing agent and an outer bottle filled with a stock solution between the inner bottle, and a sealing material between the top surface of the inner bottle and the valve mechanism When the screw cap is tilted, the compression of the sealing material in the vertical direction becomes non-uniform, that is, the force for pressing the seal varies in the circumferential direction, specifically, the screw cap is tilted. The seal pressing force on the side opposite to the side can be weakened, and the pressurizing agent can be released from the inner bottle.

FIG. 1 a is a cross-sectional view of a discharge container according to an embodiment of the present invention, and FIG. 1 b is an enlarged view of the vicinity of a screw portion. It is a side view which shows the state in which a screw cap inclines. It is sectional drawing which shows the state change in the screw part vicinity when a screw cap inclines. It is sectional drawing which shows the state change in the screw part vicinity when a screw cap inclines. It is sectional drawing of the discharge container which concerns on different embodiment of this invention. It is sectional drawing of the discharge container which concerns on further different embodiment of this invention.

  Next, an embodiment of the discharge container of the present invention will be described in detail based on the drawings. The discharge container 1 shown in FIGS. 1 and 2 includes a container body 11, a valve assembly 12 attached to the mouth portion 11e of the container body 11, and an O-ring 13 that seals between the container body 11 and the valve assembly 12. Consists of.

  The container body 11 is formed by blow molding or the like from a synthetic resin (thermoplastic resin) such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), or polyamide (PA). It consists of a part 11b, a shoulder part 11c and a cylindrical neck part 11d. The vicinity of the upper end of the neck portion 11d is the aforementioned mouth portion 11e. The top surface of the mouth portion 11e is flat and the inner peripheral surface is a smooth cylindrical surface. A threaded portion 11f made of a spiral protrusion is formed on the outer peripheral surface of the neck portion 11d. An O-ring holding portion 11g that holds the O-ring 13 is formed below the screw portion 11f. The O-ring holding portion 11g is a square groove that is continuous in the circumferential direction, and includes a bottom surface 11h (vertical surface) parallel to a seal surface 15e of a screw cap 15 described later, and two side walls 11i and 11i (horizontal plane) parallel to each other. It is composed of A flange portion 11j extends in the horizontal direction below the O-ring holding portion 11g.

  The valve assembly 12 includes a valve mechanism 14 and a screw cap 15. The valve mechanism 14 includes a valve housing 16, a stem 17 accommodated therein so as to be movable up and down, an elastic body 18 that urges the stem 17 upward, and a stem rubber 19 that opens and closes the stem hole 17a.

  The valve housing 16 is substantially cup-shaped and has an upper end opened. And the stem 17 and the elastic body 18 are accommodated in the inside from this opening. Further, the diameter near the upper end of the valve housing 16 is enlarged, and a ring-shaped stem rubber 19 is supported. Moreover, a hole is formed in the bottom surface and communicates with the inside of the container body 11. A dip tube 20 is connected to the lower end of the valve housing 16.

  The screw cap 15 is formed by molding a synthetic resin (thermoplastic resin) such as polypropylene (PP) or polyacetal (POM), and includes a cylindrical portion 15a covering the outer periphery of the mouth portion 11e and the neck portion 11d of the container body 11, It consists of a substantially cup-shaped valve holding portion 15b that holds the valve mechanism 14, and a ring portion 15c that connects the upper end of the cylindrical portion 15a and the lower end of the valve holding portion 15b. A screw portion 15d made of a spiral protrusion is formed on the inner surface of the tube portion 15a. The screw portion 15d corresponds to the screw portion 11f on the outer periphery of the neck portion 11e. Below the screw portion 15d, a seal surface 15e that is parallel to and perpendicular to the bottom surface 11h of the O-ring holding portion 11g is provided toward the lower end of the cylindrical portion 15a. The O-ring 13 is pressed in the horizontal direction by the sealing surface 15e and seals between the screw cap 15 and the neck portion 11d of the container main body 11. As described above, when the seal surface 15e is formed of a vertical surface (a smooth surface without a step), the O-ring 13 is not twisted when the screw cap 15 is screwed to the container body 11. An engagement protrusion 15f for locking the valve housing 16 is provided on the inner peripheral surface of the valve holding portion 15b. An opening for projecting the stem 17 to the outside is provided at the center of the upper surface of the valve holding portion 15b.

  The discharge container 1 having the above configuration is filled with the stock solution C and the pressurizing agent P, and the discharge member 21 is attached to the valve assembly 12 to obtain a discharge product.

  The stock solution C is not particularly limited as long as it is a fluid. It may be a low viscosity liquid or a high viscosity fluid such as cream or gel. As stock solutions, liquids for space spraying such as fragrances, deodorants, pesticides, daily preparations such as shampoos, rinses, shavings, antiperspirants, astringents, moisturizers, skin care such as sunscreens, hair sprays , Hair care such as hair cream and hair oil, antiphlogistic analgesics, chemicals such as anti-itch, and foodstuffs such as olive oil.

  Examples of the pressurizing agent P include compressed gases such as nitrogen, compressed air, carbon dioxide, and nitrous oxide, and liquefied gases such as liquefied petroleum gas, dimethyl ether, and hydrofluoroolefin. The pressure after filling is, for example, about 0.3 to 1.0 MPa at 25 ° C. The pressurizing agent P can be filled from the stem 17.

  The discharge member 21 is a so-called push button, and includes a mounting portion 21a for mounting on the stem 17, a spray mechanism 21b for discharging the contents in the form of a mist, and a communication path 21c extending from the mounting portion 21a to the spray mechanism 21b. And. When the push button 21 is pushed down, the stem 17 is pushed down, the stem hole 17a closed by the stem rubber 19 is opened, and the contents (stock solution C and pressurizing agent P) are transferred from the container body 11 to the valve mechanism 14, It is discharged to the outside through the discharge member 21. In addition, as the discharge member 21, it can replace with a well-known thing suitably according to the content. For example, the spray mechanism 21b may not be provided.

By the way, the screw part 11f of the container main body 11 and the screw part 15d of the screw cap 15 satisfy the following conditions (1) to (3).
(1) Thread width W1 of the screw portion 15d of the screw cap 15 (the line connecting the vertices of the screw portions 15f of the container body 11 is defined as a reference line SL, and the reference line SL when the screw cap 15 is attached) The width of the thread at the position (height) is a distance W2 between the threads of the screw portion 11f of the container body 11 (the distance between the threads at the position (height) of the reference line SL). It is 50 to 90% with respect to it, Preferably it is 60 to 85%.
0.5 ≦ W1 / W2 ≦ 0.9 (Expression 1)
0.6 ≦ W1 / W2 ≦ 0.85 (Formula 2)
(2) The thread of the screw part 15d of the screw cap 15 is 50 to 90% of the thread height H2 of the screw part 11f of the container main body 11 with respect to the screw thread of the screw part 11f of the container main body 11, preferably 60-85% engaged.
0.5 ≦ H3 / H2 ≦ 0.9 (Equation 3)
0.6 ≦ H3 / H2 ≦ 0.85 (Formula 4)
(H3: engagement length between the screw thread of the screw part 15d of the screw cap 15 and the screw thread of the screw part 11f of the container body 11)
(3) The cross section (thread cross section) of the screw portion 15d of the screw cap 15 is substantially trapezoidal.

  The reason is that if W1 / W2 <0.5, the screw cap 15 is likely to come off, and if W1 / W2> 0.9, the screw cap 15 is difficult to tilt, and the O-ring 13 is horizontal due to the seal surface 15e. The compression in the direction is maintained, the sealing performance of the O-ring is not deteriorated, and further, it is difficult to form a gap through which the O-ring 13 can pass between the outer periphery of the mouth portion 11e of the container body 11 and the sealing surface 15e. It is. Further, if H3 / H2 <0.5, the screw cap 15 is likely to come off, and if H3 / H2> 0.9, when the screw cap 15 is screwed into the neck portion 11d, the thread of one screw portion is threaded. The top of the contact with the vicinity of the valley bottom of the screw groove of the other screw part, the hem of the screw cap 15 (below the cylinder part 15a) expands, the O-ring 13 can not be sufficiently pressed by the seal surface 15e, This is because airtightness in a normal storage state is lowered. This is because if the cross section of the screw portion 15d of the screw cap 15 is substantially trapezoidal, it is easy to ensure a gap for tilting the screw cap 15 between the screw portion 11f of the container body 11. In addition, although the cross-sectional shape of the screw part 11f of the container main body 11 is a substantially triangular shape with rounded vertices, it may be substantially trapezoidal like the screw part 15d of the screw cap 15.

  In addition to the above conditions, the thread angle α of the threaded portions 11f and 15d of the container body 11 and the screw cap 15 is preferably set to 30 to 70 degrees. In addition, in order to engage the screw parts 11f and 15e with each other, the thread angle α of the container body 11 and the screw cap 15 is set to the same value. In addition, it is preferable that the number of threads to be engaged be 2 to 3 turns. Moreover, it is preferable that the outer diameter of the neck part 11d (part in which the screw is not formed) is 20 to 35 mm.

  In the discharge container 1 having the above-described configuration, the screw cap 15 is removed even after the container body 11 is filled with the stock solution C and the pressurizing agent P and stored for a long period of time (for example, stored at 50 ° C. for one month). Never fly. When stored at a high temperature, the pressure P tends to expand, the amount of pressure P dissolved in the stock solution C decreases, the vapor pressure of the stock solution C increases, and the internal pressure tends to increase. Further, the strength of the screw cap 15 and the container body 11 made of thermoplastic resin is reduced. However, since the width W1 of the screw portion 15d of the screw cap 15 is in a specific range with respect to the distance W2 between the screw portions 11f of the container body 11, the screw bends and slides on the other screw. In addition, the engagement between the screw portions 11f and 15d can be maintained.

  However, since the gap between the thread of the screw cap 15 and the thread of the container body 11 is created while maintaining the engagement between the threads, the screw cap 15 that receives the pressure of the pressurizing agent P is generated. However, as the volume of the space filled with the pressurizing agent P is increased as much as possible, the space moves in the gap, and as a result, the screw cap 15 is inclined with respect to the container body 11 (see FIG. 2). When the screw cap 15 is inclined, the compression of the O-ring 13 in the horizontal direction by the seal surface 11f becomes uneven, and the pressurizing agent P is likely to leak. Specifically, as shown in FIG. 3, on the side opposite to the inclined side of the screw cap 15, the seal surface 15e and the outermost portion of the O-ring holding portion 11g (the horizontal portion 11i below the O-ring holding portion 11g). The outermost end: the gap S1 between the seal surface 15e and the outer peripheral surface of the neck portion 11d facing the surface widens, and the force pressing the O-ring 13 becomes weak, and the pressurizing agent P is likely to leak. When the increase in the internal pressure and the decrease in the cap strength are greater than the speed at which the pressurizing agent P leaks, the gap S1 further expands. Eventually, the O-ring 13 that receives the internal pressure moves from the O-ring holding portion 11g, and when the width of the gap S1 becomes a width that allows the O-ring 13 to pass through, a part of the O-ring 13 passes through the gap S1 and the screw cap 15. Protrude outside. At this time, the seal is largely released and the pressurizing agent P is released to the outside.

  FIG. 3 shows the side on which the gap S1 is widened (the side opposite to the side on which the screw cap 15 is inclined). FIG. 4 is the opposite side on the side on which the gap S1 is narrowed (the screw cap is inclined). Side). As shown in FIG. 4, as the screw cap 15 is tilted, the gap S1 between the seal surface 15e and the outermost portion of the O-ring holding portion 11g becomes narrower, and eventually both come into contact with each other. When it comes into contact, the further inclination of the screw cap 15 is restricted. However, since the gap S1 is the same as or larger than the interval (gap) S2 between the seal surface 15e and the top of the thread portion 11f of the container body 11, the screw cap 15 can be tilted sufficiently. On the side where the gap S1 is widened, a gap that allows the O-ring 13 to pass through can be formed without difficulty between the seal surface 15e and the outermost part of the O-ring holding portion 11g.

  In addition, since the internal pressure is lost when the entire amount of the pressurizing agent P is released, the discharged product cannot be used thereafter. However, the screw thread of the screw part 15d of the screw cap 15 is 50% (particularly 60%) or more of the thread height H1 of the screw part 11f of the container main body 11 with respect to the screw thread of the screw part 11f of the container main body 11. If engaged, since the occurrence of an early tilt of the screw cap 15 is suppressed, the pressurizing agent P is not released early, which is hindered by normal use (for example, stored at 50 ° C. for one month). Will not come out.

  In the discharge container 1 </ b> A shown in FIG. 5, the container body 22 is a double bottle composed of an inner bottle 24 filled with the stock solution C and an outer bottle 23 filled with the pressure agent P between the inner bottle 24. Yes. In addition, since the outer bottle 23 is substantially the same as the container main body 11 of the said embodiment except the bottom part being hemispherical, the same code | symbol is attached | subjected and specific description is abbreviate | omitted.

  The inner bottle 24 is formed by blow molding or the like from a synthetic resin (thermoplastic resin) such as polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polyamide (PA). 24a, the trunk | drum 24b, the shoulder part 24c, and the cylindrical neck part 24d. A mouth 24e is provided near the upper end of the neck 24d. The inner peripheral surface of the mouth 24e is a smooth cylindrical surface. The mouth portion 24e has a flange portion 24f that extends outward in the radial direction. And the top surface of the inner bottle 24 is comprised by the upper surface of the opening part 24e containing the flange part 24f. This top surface is flat. The flange portion 24 f is engaged with the top surface of the mouth portion 11 e of the outer bottle 23. A groove 24g is formed from the lower surface of the flange 24f to the outer periphery of the neck 24d. The groove 24g is used as a filling path for filling the pressurizing agent P between the outer bottle 23 and the inner bottle 24. The inner bottle 24 having the above-described configuration is flexible enough to be easily crushed by the pressure of the pressurizing agent P.

  In the valve assembly 25, the valve mechanism 14 corresponds to a double bottle. Specifically, the stem 26 is a double stem having an outer stem 26a communicating with the inside of the outer bottle 23 and an inner stem 26b communicating with the inside of the inner bottle 24, and corresponds to each of the stems 26a, 26b. Two stem rubbers 27 and 28 are provided. The discharge member 21A blocks the upper end opening of the outer stem 26a in order to prevent the pressurizing agent P from being discharged while discharging the stock solution C.

  The valve housing 29 includes a flange portion 29 a and is engaged with the top surface of the mouth portion 24 e of the inner bottle 24. A groove portion 29b is formed on the upper surface of the flange portion 29a. The groove 29 b is used as a filling path for filling the pressurizing agent P between the outer bottle 23 and the inner bottle 24. Further, the valve housing 29 includes a cylindrical portion 29 c that is inserted into the mouth portion 24 e of the inner bottle 24. An O-ring holding portion 29d that holds an O-ring (inner O-ring) 30 is formed on the outer peripheral surface of the cylindrical portion 29c. The O-ring holding portion 29d is a rectangular groove that is continuous in the circumferential direction, and includes a bottom surface 29e (vertical surface) parallel to the inner peripheral surface of the inner bottle 24 and two side walls 29f and 29f (horizontal plane) parallel to each other. Has been. The inner O-ring 30 held by the O-ring holding portion 29d is pressed horizontally between the inner peripheral surface of the mouth portion 24e of the inner bottle 24, and the valve mechanism 14 (valve housing 29) and the inner bottle 24 are The gap is sealed.

  A flow path member 31 is attached to the lower part of the valve housing 29. The flow path member 31 has a columnar shape that is substantially the same diameter as the inner diameter of the mouth portion 24 e of the inner bottle 24, and fills the mouth portion 24 e of the inner bottle 24. The lower end of the flow path member 31 has a dome shape. A groove 31a is formed from the lower end to the upper end. The groove 31a functions as a flow path of the stock solution C filled in the inner bottle 24 to the valve housing 29 side.

  Also in the discharge container 1A configured as described above, the valve assembly 25 is attached to the outer bottle 23 by screwing the screw portion 15d of the screw cap 15 to the screw portion 11f of the outer bottle 23. Each thread part 11f and 15d is formed so that the conditions of (1)-(3) may be satisfy | filled similarly to the said discharge container 1. FIG. Therefore, the screw cap 15 will not come off even if the container body 11 is filled with the stock solution C and the pressurizing agent P and then stored for a long time at a high temperature (for example, stored at 50 ° C. for one month). Further, even if the screw cap 15 is inclined due to strength reduction or internal pressure, the inner bottle 24 remains sealed by the inner O-ring, so that only the pressurizing agent P is discharged to the outside without discharging the stock solution C. be able to.

  In the discharge container 1 </ b> B shown in FIG. 6, the container body 22 is a double bottle including an inner bottle 24 filled with the pressurizing agent P and an outer bottle 23 filled with the stock solution C between the inner bottle 24. Yes. That is, the place where the pressurizing agent P and the stock solution C are filled is opposite to that of the discharge container 1A. Therefore, the stock solution C is discharged from the discharge member 21 to the outside through the groove portion 24g of the inner bottle 24, the inner peripheral surface of the screw cap 15 and the flange portions 24f and 29a, the groove portion 29b of the valve housing 29, and the outer stem 26a. Is done. The inner bottle 24 gradually swells as the remaining amount of the stock solution C decreases, and finally comes into contact with the inner surface of the outer bottle 23.

  In this discharge container 1B, in order to prevent leakage of the pressurizing agent P filled in the inner bottle 24, the top surface of the inner bottle 24 (the upper surface of the mouth portion 24e of the inner bottle 24) and the flange portion 29a of the valve housing 29 A flat ring-shaped sealing material 32 is interposed between the lower surface and the lower surface. The sealing material 32 is compressed in the vertical direction between the top surface of the inner bottle 24 and the flange portion 29a by screwing the screw cap 15 into the screw portion 11f of the outer bottle 23, and the inner bottle 24 and the valve mechanism. 14 (valve housing 29).

  By the way, also in this discharge container 1B, the screw parts 11f and 15d are formed so as to satisfy the conditions (1) to (3). Therefore, the screw cap 15 will not come off even if the container body 11 is filled with the stock solution C and the pressurizing agent P and then stored for a long time at a high temperature (for example, stored at 50 ° C. for one month). Further, when the screw cap 15 is tilted due to strength reduction or internal pressure, the distance between the top surface of the inner bottle 24 and the flange portion 29a becomes narrower on the side on which the screw cap 15 is tilted, whereas on the other hand, on the side on which the screw cap 15 is tilted. It spreads on the opposite side and the degree of compression of the sealing material 32 becomes non-uniform. Therefore, the pressurizing agent P leaks from the side where the interval is particularly wide. The pressurizing agent P leaked from the inner bottle 24 flows between the inner surface of the screw cap 15 and the outer surface of the neck 11 d of the outer bottle 23, but between the screw cap 15 by the O-ring 13 and the outer bottle 23. Since the degree of compression of the seal is uneven due to the inclination of the screw cap 15, and the degree of compression is weak particularly on the side opposite to the side where the screw cap 15 is inclined, the pressure of the pressure agent P If it wins, it breaks the seal and is released to the outside. At this time, if the screw cap 15 is largely inclined and a sufficient space is formed between the seal surface 15e and the O-ring holding portion 11g, a part of the O-ring 13 is partly screwed by the pressure of the pressurizing agent P. It will stick out (refer FIG.2 and FIG.3).

  In addition, about another structure, since it is substantially the same as the said discharge container 1A, the same code | symbol is attached | subjected and specific description is abbreviate | omitted. However, in the discharge container 1B, since the pressure agent P is filled in the inner bottle 24, the flow path member 31 is installed for the purpose of reducing the remaining amount of the stock solution C at the neck portion 24d of the inner bottle 24. Is unnecessary. In order to prevent the pressurizing agent P from being discharged while discharging the stock solution C, the discharge member 21B closes the upper end opening of the inner stem 26b while opening the outer stem 26a. Further, since the seal between the inner bottle 24 and the valve mechanism 14 is formed by the sealing material 32, the inner O-ring 30 and the O-ring holding portion 29d for holding the inner O-ring 30 are unnecessary. .

  As mentioned above, although typical embodiment of this invention was described, this invention is not limited to the said embodiment, It can be implemented in various changes within the scope of this invention. For example, in the above embodiment, the conditions (1) to (3) of the screw portions 11f and 15d are all satisfied, but for example, only the conditions (1) may be satisfied. Further, it may satisfy (1) and (2) or (1) and (3).

1, 1A, 1B Discharge container 11 Container body 11a Bottom part 11b Body part 11c Shoulder part 11d Neck part 11e Mouth part 11f Screw part 11g O-ring holding part 11h Bottom face 11i Side wall 11j Flange part 12 Valve assembly 13 O-ring 14 Valve mechanism 15 Screw cap 15a Tube portion 15b Valve holding portion 15c Ring portion 15d Screw portion 15e Sealing surface 15f Engagement protrusion 16 Valve housing 16a Diameter expansion portion 16b Support step portion 16c Ring protrusion 16d Communication hole 16e Lower tube portion 17 Stem 17a Stem hole 18 Elastic body 19 Stem rubber 20 Dip tube 21, 21A, 21B Discharge member (push button)
21a Mounting part 21b Spray mechanism 21c Communication path 22 Container body 23 Outer bottle 24 Inner bottle 24a Bottom part 24b Body part 24c Shoulder part 24d Neck part 24e Mouth part 24f Flange part 24g Groove part 25 Valve assembly 26 Stem 26a Outer stem 26b Inner stems 27, 28 Stem rubber 29 Valve housing 29a Flange portion 29b Groove portion 29c Tube portion 29d O-ring holding portion 29e Bottom surface 29f Side wall 30 Inner O-ring 31 Channel member 31a Groove portion 32 Seal material C Stock solution P Pressurizing agent W1 Screw thread of screw cap Width W2 The distance between the threads of the threaded part of the container body H1 The height of the threaded part of the threaded part of the screw cap H2 The height of the threaded part of the threaded part of the container body H3 The thread of the threaded cap of the container body Engagement length with screw thread α Thread angle S1 Distance between the outside (gap)
S2 Spacing (gap) between the seal surface and the top of the thread of the threaded portion of the container body
SL reference line

Claims (6)

A container body for filling a stock solution and a pressurizing agent;
A discharge container comprising a valve assembly attached to the container body,
A screw part and an O-ring holding part for holding an O-ring below the screw part are formed on the outer periphery of the neck part of the container body,
The valve assembly includes a valve mechanism and a screw cap;
The screw cap includes a cylindrical portion formed with a screw portion that engages with the screw portion of the container body,
A sealing surface for pressing the O-ring held in the O-ring holding portion in the horizontal direction is formed below the screw portion in the cylinder portion,
The discharge container, wherein a thread width of the screw cap is 50 to 90% with respect to a distance between the threads of the container body. The discharge container according to claim 1, wherein the screw cap of the screw cap engages with the screw thread of the screw portion of the container main body by 50 to 90% of the height of the screw thread of the screw main portion of the container main body. The discharge container according to claim 1 or 2, wherein the screw cap has a substantially trapezoidal cross section. The distance between the seal surface and the outermost part of the O-ring holding part is the same as or larger than the distance between the seal surface and the top of the thread of the threaded portion of the container body. 4. The discharge container according to any one of 3. The container body is a double bottle comprising an inner bottle filled with a stock solution and an outer bottle filled with a pressure agent between the inner bottles,
The discharge container according to any one of claims 1 to 4, further comprising an inner O-ring between the inner surface of the mouth portion of the inner bottle and the valve mechanism. The container body is a double bottle comprising an inner bottle filled with a pressurizing agent, and an outer bottle filled with a stock solution between the inner bottle,
The discharge container in any one of Claims 1-4 provided with the sealing material between the top | upper surface of an inner bottle, and a valve mechanism.

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