JP5848181B2 - Foam dispenser - Google Patents

Description

  The present invention relates to a foam dispenser.

  As this kind of discharger, as shown in FIG. 8, a cylinder member B that is mounted on a container body A and hangs a small-diameter liquid cylinder portion from a large-diameter air cylinder portion, and a liquid piston that slides in the liquid cylinder portion And an actuating member D having a push-down head attached to the upper end of the stem S standing up from above, and a tubular body (cylindrical valve portion) C fitted to the outer surface of the lower half of the stem so as to be movable up and down. And an air piston E that is in sliding contact with the cylinder portion for use, and the liquid in the liquid cylinder portion and the air in the air cylinder portion are mixed by pushing down the push-down head, foamed, and discharged as bubbles. (Patent Document 1).

Specifically, fitting the lower half and the upper half of the stem S of the actuating member D as the cylindrical portion of the separate, the stem destination half S ₁ airtightly to the outer surface the upper end portion of the stem Motohan portion S ₂ At the same time, the lower end portion of the stem tip half is used as the large inner diameter portion, and the upper portion of the cylindrical valve portion C is slidably fitted into the space F in the large inner diameter portion. using an air passage P _a formed between the _second outer peripheral surface and the cylindrical valve portion C and the inner peripheral surface of the stem destination halves S _1, it leads to the air in the air cylinder portion therein stem, for liquid It mixes with the liquid supplied from the cylinder part.

JP2009-240853

In the foam discharger with the pressing head, there is a risk that the foam may drip from the tip of the nozzle and wet the surroundings.
In addition, since the nozzle tip is in contact with air, there is a current situation in which bubbles tend to solidify. In order to prevent this, it is advantageous to have a back sucking function for sucking bubbles in the nozzle back to the cylinder side after discharging the bubbles.

  An object of the present invention is to propose a foam dispenser that exhibits a backsuction function by utilizing the movement of an air piston with respect to a stem.

The first means is
A liquid container 2 standing up the mouthpiece part 4,
A mounting member 10 that projects an inwardly flanged top wall portion 14 from the top of the mounting tube 12 fitted to the outer surface of the mouth tube portion 4, and
A small-diameter liquid cylinder portion 26 is suspended from the lower end of the large-diameter air cylinder portion 22, and the flange portion 23 attached to the upper portion of the air cylinder portion 22 is inward with the upper end surface of the mouth tube portion 4. A cylinder member 20 that is sandwiched between the rear surface side of the flange-like top wall portion 14 and suspended in the liquid container 2, and
The liquid cylinder portion 26 from the vertically movable cylindrical liquid piston 42 upwardly biased state, the lower end of the stem destination half 60 to the upper end internal surface of the stem Motohan portion 52 internally provided with a liquid discharge valve V _2L The stem 50 formed by fitting the parts, the actuating member 40 provided with the foaming part 70 in the stem tip half 60,
A poppet valve body 76 that is inserted into the liquid piston 42 and the liquid cylinder portion 26 so as to be movable up and down, and forms a liquid suction valve V _{1 L} between the lower portion of the inner surface of the liquid cylinder portion;
A sliding portion 86 projecting from a cylindrical valve portion 82 capable of moving up and down the outer peripheral surface of the stem base half portion 52 via a ring-shaped wall portion 84 is brought into sliding contact with the inner surface of the air cylinder portion 22 to thereby form the ring-shaped wall. An air piston 80 having an air suction valve V _1A formed in a part of the portion 84, and
An air chamber R ₂ for discharging air is formed in the air cylinder portion below the air piston 80, and a gas-liquid mixing chamber R ₁ is formed in the liquid flow path portion between the liquid discharge valve V 2 _L and the foaming portion 70. from the chamber R _2, the air passage for opening via a gap between the outer peripheral surface and the inner peripheral surface of the tubular valve portion 82 and the stem destination half 60 of the stem Motohan portion 52 into the gas-liquid mixing chamber R ₁ opened the P _a, the dispenser provided with air discharge valve V _2A the end portions of the air chamber R ₂ side of the air passage,
Between the facing surfaces of the outer peripheral surface and the pressing head of the stem destination halves 60, forming a back sack Deployment passage Ps than stem destination halves 60 return from the downstream of the flow path portion into said air passage P _A while, at the confluence portion between the back suck Deployment passage Ps and the air passage P _a, back sacks Deployment open during the ascent of the pressing head 72 is closed during the descent of the pressing head 72 in conjunction with the air piston 80 It was formed use suction valve V _4.

This means, as shown in FIG. 1, the back-sack Deployment flow path Ps between the facing surfaces of the outer peripheral surface of the stem destination halves 60 and pressing head 72 provided with the flow passage and the air passage P _A proposes a forming a back sack Deployment for suction valve V ₄ in conjunction with an air piston 80 to the connection point. As a result, after the push-down head 72 has been pushed down to the lower limit position, when the push-down head ascends (see FIG. 7), the suction valve V ₄ for back suction and the back suck are reduced by the negative pressure in the air chamber R ₂ . Bubbles can be sucked from the nozzle side via the flow path Ps for the operation.

The second means includes the first means, and the tubular valve portion 82 is extended to the vicinity of the upper end portion of the stem base half portion 52 and formed at the upper end portion of the tubular valve portion 82. and body 82a, with a second annular valve seat portion 60a to be formed on the outer peripheral surface lower portion of the stem destination half 60 to form a suction valve V ₄ for the back sacks Deployment.

Formed in the present means, as shown in FIG. 2, the back sack Deployment for suction valve V _4, and annular valve body 82a having a cylindrical valve portion 82, a second annular valve seat portion 60a of the stem destination halves 60 doing.

According to the invention according to the first means, the back sack Deployment flow path Ps between the facing surfaces of the outer peripheral surface of the stem destination halves 60 and pressing head 72 is provided, the flow path and the air passage P _A of from the formation of the suction valve V ₄ for back sacks Deployment in conjunction with an air piston 80 to the connecting portion can be realized back sack Deployment function after bubble discharge.
According to the invention according to the second means, the back-sac Deployment for suction valve V _4, and the annular valve body 82a of the tubular valve portion 82 the upper end, the outer peripheral surface lower portion of the stem destination half 60 2 Since it is formed with the annular valve seat portion 60a, a back suction function can be realized with a simple structure.

It is a semi-longitudinal sectional view of the foam dispenser concerning a 1st embodiment of the present invention. It is a principal part enlarged view of the foam discharger of FIG. It is a cross-sectional view of the AA direction of the foam discharger of FIG. It is explanatory drawing of the step which started depressing the pressing head of the foam discharger of FIG. It is explanatory drawing of the stage which further pushed down the said pressing head from the floor of FIG. FIG. 6 is a partially enlarged view of the foam discharger in the state of FIG. 5. FIG. 6 is an explanatory diagram of a stage in the middle of the pressing head returning from FIG. 5 to the original position. It is sectional drawing of a conventional container.

  1 to 8 show a foam dispenser according to a first embodiment of the present invention. This foam discharger includes a liquid container 2, a mounting member 10, a cylinder member 20, an operating member 40, a poppet valve body 76, an air piston 80, and an overcap 96. Each of these members can be formed of a synthetic resin unless otherwise specified. For the convenience of explanation, first, a conventionally known matter will be explained.

  The liquid container 2 has a mouth tube portion 4 having an upper end opening. In the illustrated example, the mouth-and-neck portion that stands up from the body portion of the container body is the mouth-tube portion 4, but for example, a connecting tube that is fitted to the mouth-and-neck portion of the container body may be used as the mouth-tube portion.

  The mounting member 10 has an inward flange-like top wall portion 14 protruding from the upper end of the mounting tube 12, and the lower half of the mounting tube 12 is screwed to the outer surface of the mouth tube portion 4. A double cylindrical holding cylinder 16 is formed on the inner edge of the inward flange-shaped top wall 14.

  The cylinder member 20 has a small-diameter liquid cylinder portion 26 suspended from the lower end of the large-diameter air cylinder portion 22 via a step portion 25, and a flange portion 23 attached to the upper outer surface of the air cylinder portion 22. It is placed on the upper end surface of the mouth tube part 4 via the packing 24 and inserted into the liquid container 2. The flange portion 23 is sandwiched between the mouth tube portion 4 and the inward flange-like top wall portion 14. The inner surface of the lower end portion of the liquid cylinder portion 26 is formed in the funnel-shaped valve seat 28, and the pipe fitting cylinder portion 30 extends downward from the lower end portion. A suction pipe is fitted into the pipe fitting cylinder portion 30. A plurality of locking ribs 32 are provided vertically at the bottom of the cylinder wall of the liquid cylinder portion 26. A spring receiving portion 32a that is an upward stepped portion is provided on the inner end side of each locking rib.

  The operating member 40 includes a liquid piston 42, a stem 50, a foaming portion 70, and a pressing head 72.

  The liquid piston 42 has a long cylindrical wall at the top and bottom, and a lower portion of the cylindrical wall is slidably fitted into the inner peripheral surface of the liquid cylinder portion 26, and the remaining cylindrical wall portion protrudes upward. Yes. Further, a ring-shaped portion 44 having a small inner diameter is provided around the liquid piston 42. A skirt-like portion that is in sliding contact with the liquid piston 42 is formed on the outer surface of the lower end of the cylindrical wall of the liquid piston 42, and a coil is provided between the lower end of the cylindrical wall of the liquid piston 42 and the spring receiving portion 32a. A spring 46 is interposed.

  The stem 50 protrudes upward from the outer surface of the liquid piston 42 through the inside of the holding cylinder portion 16. The stem 50 includes a stem base half 52 and a stem tip half 60.

The stem Motohan unit 52 has its cylindrical wall which incorporates a liquid discharge valve V _2L, and the Tsutsukabe bottom is fitted in a liquid tight manner to the upper outer surface of the liquid piston 42. An outward rib is provided around the outer surface of the intermediate portion of the illustrated stem base half 52, and the upper surface of the outward rib is formed in the first annular valve seat portion 54.

Further, in the illustrated example, an annular protrusion 57 is projected inward and upward from the inner peripheral surface of the intermediate portion in the vertical direction of the stem base half 52, and a ball valve is placed on the annular protrusion 57, whereby the liquid discharge valve V _2L is formed.

A cylindrical member 58 that restricts the movement of the ball valve is provided above the ball valve. In the illustrated example, this cylindrical member 58 is fitted with a mounting cylinder 58b on the outer periphery of the annular projection 57 of the stem base half 52, and a plurality of connecting pieces 58c protruding from the inner surface of the mounting cylinder 58b. A cylindrical body 58a having a top is supported. The cylindrical body 58a is located directly above the liquid discharge valve V _2L, it has a gap between the cylindrical body 58a and a cylindrical mounting portion 58b in toward the gas-liquid mixing chamber R ₁ is flowing liquid. A plurality of notches 59 are formed at the lower end of the cylinder 58a.

The stem tip half 60 has a lower portion of the cylindrical wall as a small diameter cylindrical portion 64 fitted to the inner surface of the upper end portion (fitting cylindrical portion 62) of the stem base half 52. And the space between the small diameter cylinder portion 64 and the liquid discharge valve V _2L and gas-liquid mixing chamber R _1. Further, the first communication groove G ₁ is formed between the inner surface of the fitting tube portion 62 and the outer surface of the small diameter tube portion 64 and between the upper end surface of the fitting tube portion 62 and the opposing surface of the stem tip half portion 60. Form. The first communication groove is to form a part of the air passage P _A which communicates with the gas-liquid mixing chamber R ₁ air chamber R ₂ to be described later.

  The foaming portion 70 is fitted in the upper portion of the cylindrical wall of the stem tip half 60 in the illustrated example. The foaming portion 70 is formed by arranging an appropriate number of foam nets on the inner surface of the cylindrical body.

  The pressing head 72 hangs down the inner peripheral wall 73a and the outer peripheral wall 73b from the top plate. The inner peripheral wall portion 73a is fitted to the outer surface of the upper portion of the cylindrical wall of the stem tip half 60, and the outer peripheral wall portion 73b is fitted into the holding cylindrical portion 16. A nozzle 74 projects from the outer peripheral wall.

The poppet valve body 76 has a plurality of locking projections 78 projecting outward on the lower outer peripheral surface of the valve stem, and these locking projections 78 engage with the lower surface of the coil spring 46 (see FIG. 1) and the state where the lower end surface of the poppet valve body 76 is in contact with the funnel-shaped valve seat 28 (see FIG. 4). The lower end surface of the poppet valve body 76 and the funnel-shaped valve seat 28 form a liquid suction valve _V1L . Further, the upper end portion of the poppet valve body 76 is mounted on the ring-shaped portion 44 as an expanded cylindrical portion 77 having a large upper end, and the non-return valve is formed by the expanded cylindrical portion 77 and the ring-shaped portion 44. to form a V _3.

  The air piston 80 has a skirt-like sliding portion 86 on the outer peripheral portion of a ring-shaped wall portion 84 extending outward from the outer surface of an appropriate position of the vertical cylindrical valve portion 82 (vertical intermediate portion in the illustrated example). The cylindrical valve portion 82 is fitted to the outer surface of the stem base half portion 52 so as to be movable up and down, and the sliding portion 86 is brought into contact with the air cylinder portion.

An air suction valve V _1A is formed in a part of the ring-shaped wall portion 84. In the illustrated example, a valve body 94 is provided by projecting an elastic valve plate obliquely upward from an attachment cylinder portion fitted to the lower half portion of the cylindrical valve portion 82, and the elastic valve plate opens to the ring-shaped wall portion. The valve hole 85 can be opened and closed. Further to form the second communicating groove G ₂ is a part of the air passage P _A between the inner peripheral surface and outer peripheral surface of the stem base half portion of the cylindrical valve portion 82, the cylindrical valve portion 82 The lower end surface is brought into contact with the first annular valve seat portion 54, and the lower end surface of the cylindrical valve portion 82 and the first annular valve seat portion 54 form an air discharge valve _V2A .

  The overcap 96 is fitted to the upper portion of the holding cylinder portion 16.

In the present invention, a back sack Deployment for suction valve V ₄ which is arranged in (the vicinity of the upper end of the stem Motohan portion 52 in the illustrated example) the middle portion of the air passage P _A, downstream from the stem destination half 60 ( forming a back sack Deployment passage Ps to Return from the channel portion of the nozzle side) through the outer stem destination halves to back suck Deployment for suction valve V _4.

  First, the back suction channel Ps is formed between the outer peripheral surface of the stem tip half 60 and the opposing surface of the pressing head 72. As shown in FIG. 3, it is desirable that the upper end portion of the back suction channel is provided so as to open over the entire upper end portion of the stem tip half. In the preferred illustrated example, a plurality of vertical ribs 75 are provided vertically on the inner surface of the inner peripheral wall portion 73a of the pressing head, and the stem tip half 60 is fitted to the inner surfaces of these vertical ribs 75. Thus, a back suction flow path Ps is formed between the inner peripheral wall portion 73a and the stem tip half portion 60. Further, the vertical rib 75 is omitted in the lower half portion of the back suction channel Ps. However, these structures can be changed as appropriate.

The suction valve V ₄ for back suction is provided so as to close when the air piston 80 rises with respect to the stem 50 in conjunction with the air piston 80 and to open more when the air piston 80 descends with respect to the stem 50. This movement of the back sack Deployment for suction valve V ₄ is the same opposite the air discharge valve V _2A. This lowers the pressing head 72, since the back sacks Deployment for suction valve V ₄ is closed (see FIG. 4) when opening air discharge valve V _2A, back sacks Deployment passage Ps air passage P _A It is isolated from the air in the air chamber R ₂ enters into the gas-liquid mixing chamber R ₁ through the air passage P _a. Also when the pressing head 72 is raised, back sacks Deployment for suction valve V ₄ is opened with an air discharge valve V _2A is closed (see FIG. 7). Thus, the sucking bubbles to back suck Deployment flow path Ps, prevents that the bubbles entering to the inside air chamber R _2. These actions will be described later.

In the illustrated example, a second annular valve seat portion 60a that is inclined upward and outward is provided at the lower end portion of the outer peripheral surface of the upper portion of the cylindrical wall that is the large diameter portion of the stem tip half portion 60. Further, the tubular valve portion 82 of the air piston 80 is extended to the upper end of the stem tip half 60, and the upper end portion of the tubular valve portion 82 is an annular valve body 82a that expands upward and outward. Then form a back sack Deployment for suction valve V ₄ between these second annular valve seat portion 60a and the annular valve body 82a. However, this structure may be appropriately modified in a range that can achieve the effect of the back-sac Deployment for suction valve V _4.

In the above configuration, when the overcap 96 is removed from the state shown in FIG. 1 and the push-down head 72 is pushed down, the poppet valve body 76 first descends together with the operating member 40, but the lower end portion of the poppet valve body 76 is a funnel-shaped valve. It stops by hitting the seat 28, and the liquid suction valve _V1L is closed (see FIG. 4). Continuing further down the pressing head 72, relative to the poppet valve body 76 has been stopped, the actuating member 40 which includes a liquid piston 42 continues to descend, with this the check valve V ₃ opened, the liquid cylinder portion 26 liquid inner rises through the stem Motohan unit 52, pushes and opens the liquid discharge valve V _2L, enters the gas-liquid mixing chamber R ₁ (see FIG. 5).

On the other hand, the air piston 80 first descends following the stem base half 52 by the depression of the depression head 72. However, since the air discharge valve _V2A is closed in the initial state, the air chamber R ₂ is closed. The inside becomes high pressure. Thus lowering the middle of the air piston 80 is relatively increased as indicated by the white arrows in FIG. 5 for the actuating member 40, it opens the air discharge valve V _2A, air air in the air chamber R ₂ and it flows into the gas-liquid mixing chamber R ₁ via a passage P _a.

In the gas-liquid mixing chamber R ₁ , the liquid and air mix and enter the foaming portion 70 through the small diameter cylindrical portion 64. And it is foamed by this foaming part 70, and is discharged from the nozzle 74 as foam.

When the pressing of the pressing head is released, the operating member 40 is lifted by the elastic restoring force of the coil spring 46. Since there is a gap ΔH between the first annular valve seat portion 54 of the operating member and the lower end of the cylindrical valve portion 82 of the air piston 80 at the very early stage of the ascending process of the operating member 40 (see FIG. 6). Even if the actuating member 40 is raised, the air piston 80 does not rise due to frictional resistance with the air cylinder portion 22. In other words, the air piston 80 descends with respect to the operating member 40 as shown by the white arrow in FIG. This opens closes the air discharge valve V _2A is back sacks Deployment for suction valve V _4, to suck the bubbles from the nozzle 74 side to the back sack Deployment flow path Ps. Air piston 80 is thereafter increased with actuation member 40, thereby the outside air from the air intake valve V _1A is sucked into the air chamber R _2.

On the other hand, the poppet valve body 76 is pulled up by the negative pressure in the liquid cylinder part due to the rise of the liquid piston 42 of the operating member 40. As a result, the liquid suction valve _V1L is opened and the liquid in the liquid container 2 is sucked into the liquid cylinder portion. The poppet valve body 76 stops when the locking projection 78 contacts the lower end of the coil spring 46. However, the actuating member 40 including the liquid piston 42 continues to rise and stops when the ring-shaped portion 44 abuts against the lower surface of the expanded cylindrical portion 77 on the upper end side of the poppet valve body 76 at the upper limit position. This check valve _{V 3} is closed.

2 ... Liquid container 4 ... Mouth tube
10 ... Mounting member 12 ... Mounting cylinder 14 ... Inward flange-shaped top wall
16 ... Holding cylinder 16a ... Vertical groove
20 ... Cylinder member 22 ... Air cylinder part 23 ... Ring part 24 ... Packing 25 ... Step part
26 ... Liquid cylinder 28 ... Funnel-shaped valve seat 30 ... Pipe fitting cylinder
32 ... Ring rib 32a ... Spring receiving part
40 ... Actuating member 42 ... Liquid piston 44 ... Ring-shaped part 46 ... Coil spring
50 ... Stem 52 ... Stem base half 54 ... First annular valve seat 56 ... Drooping cylinder
57 ... annular projection 58 ... cylindrical member 58a ... cylinder 58b ... mounting cylinder 58c ... connecting piece 59 ... notch
60 ... Stem tip half 60a ... Second annular valve seat 62 ... Fitting cylinder 64 ... Small diameter cylinder
70 ... Foaming part 72 ... Pushing head 73a ... Inner peripheral wall part 73b ... Outer peripheral wall part
74 ... Nozzle 75 ... Vertical rib
76 ... Poppet valve body 77 ... Expanded cylinder part 78 ... Locking protrusion
80 ... Air piston 82 ... Cylindrical valve part 82a ... Annular valve body
84 ... Ring-shaped wall 85 ... Valve hole 86 ... Sliding part
94 ... valve body 96 ... overcap A ... container body B ... cylinder member C ... cylindrical valve portion D ... actuating member E ... air piston F ... space G 1 _... first communication groove G 2 _... second communication groove [Delta] H ... Gap P _A ... Air passage P _S ... Back-suction channel R ₁ ... Gas-liquid mixing chamber R ₂ ... Air chamber
S ... Stem S ₁ ... Stem tip half S ₂ ... Stem base half V _1L ... Liquid suction valve V _2L ... Liquid discharge valve V _1A ... Air suction valve V _2A ... Air discharge valve V ₃ ... Check valve V ₄ ... Suction valve for back suction

Claims (2)

A liquid container (2) that stands up the mouthpiece (4);
A mounting member (10) formed by projecting an inward flange-like top wall (14) from the upper part of the mounting cylinder (12) fitted to the outer surface of the mouth tube part (4),
A small-diameter liquid cylinder portion (26) is suspended from the lower end of the large-diameter air cylinder portion (22), and the flange portion (23) attached to the upper portion of the air cylinder portion (22) is A cylinder member (20) suspended between the upper end surface of the portion (4) and the back surface side of the inward flange-like top wall portion (14) and suspended in the liquid container (2);
The liquid cylinder portion from (26) the possible lifting of the above biasing state cylindrical liquid piston (42), inner surface of the upper end of the liquid discharge valve (V _2L) and internally provided with stem Motohan portion (52) The stem (50) is formed by fitting the lower end of the stem tip half (60) to the working member (40) provided with the foaming portion (70) in the stem tip half (60). ,
A poppet valve body that is inserted into the liquid piston (42) and the liquid cylinder part (26) so as to be movable up and down, and forms a liquid suction valve ( _V1L ) between the lower part of the inner surface of the liquid cylinder part. (76)
The sliding part (86) protruding through the ring-shaped wall part (84) from the cylindrical valve part (82) capable of moving up and down the outer peripheral surface of the stem base half part (52), the air cylinder part (22) An air piston (80) which is in sliding contact with the inner surface and has an air suction valve (V _1A ) formed on a part of the ring-shaped wall (84).
An air cylinder (R ₂ ) for air discharge is provided in the air cylinder portion below the air piston (80), and a gas-liquid mixing chamber is provided in the liquid flow path portion between the liquid discharge valve (V _2L ) and the foaming portion (70). (R ₁ ) is formed, and from the air chamber (R ₂ ), the outer peripheral surface of the stem base half (52) and the inner peripheral surfaces of the tubular valve portion (82) and the stem tip half (60) The air passage (P _A ) that opens to the gas-liquid mixing chamber (R ₁ ) via the gap is opened, and the air discharge valve (V _2A ) is connected to the end of the air passage on the air chamber (R ₂ ) side. In the dispenser provided with
Between the outer peripheral surface and the opposing surface of the depression head of the stem destination half (60), back sacks Deployment returning from the downstream of the flow passage portion than the stem destination half (60) into the air passage (P _A) and forming use flow path (Ps), to the junction point of the back sack Deployment passage and (Ps) and an air passage (P _a), pressing the head in conjunction with the air piston (80) (72) A foam dispenser characterized by forming a suction valve (V ₄ ) for back suction that closes when lowered and opens while the pressing head (72) is raised. The tubular valve portion (82) is extended to the vicinity of the upper end portion of the stem base half portion (52), the annular valve body (82a) formed at the upper end portion of the tubular valve portion (82), and the stem tip The suction valve for backsuction (V ₄ ) is formed by the second annular valve seat portion (60a) formed at the lower end portion of the outer peripheral surface of the half portion (60). Foam dispenser.