JP6993279B2 - Foam ejector - Google Patents

Description

The present invention relates to a foam ejector.

As this kind of foam ejector,
A mounting member with an inward flange attached to the upper end of the mounting cylinder,
A cylinder member that is mounted inside the mounting member and consists of a large-diameter air cylinder and a small-diameter liquid cylinder that are concentrically connected up and down.
A liquid piston that slides in the liquid cylinder is projected from the lower part of the outer circumference of the piston guide, and an air piston that slides in the air cylinder is linked to the upper part of the outer circumference of the piston guide, and a discharge head is fitted to the upper end of the piston guide. It is equipped with an operating member that can be moved up and down in an upwardly urged state, and the liquid in the liquid cylinder and the air in the air cylinder are merged in the gas-liquid mixing chamber by the vertical movement of the operating member to form a foaming member. There is known a structure in which foam is generated through a discharge head and discharged from a discharge port of a discharge head (Patent Document 1).

JP-A-2004-121889

In Patent Document 1, after the air inside the air cylinder is pressure-fed to the gas-liquid mixing chamber by the lowering of the operating member, the gap between the inner edge of the inward flange and the operating member is included as the operating member rises. It was configured to introduce outside air into the inside of the air cylinder through the air introduction path. Therefore, if water droplets adhere to the vicinity of the inlet of the air introduction path, the water may be drawn into the air chamber formed between the air piston and the bottom of the air cylinder as the outside air is sucked.
When water accumulates in the air chamber in this way, the effective volume in the air cylinder is reduced, which reduces the amount of air sent from the air cylinder to the gas-liquid mixing chamber, so that the air-liquid mixing ratio is increased. May change. Further, if the amount of water accumulated in the air chamber increases, the fluid sent from the air cylinder to the gas-liquid mixing chamber may be mixed with water.

A first object of the present invention is to propose a foam ejector capable of reducing the above-mentioned inconvenience and suppressing the infiltration of liquid into the air chamber from the outside through the air introduction path.
A second object of the present invention is to provide a foam discharger capable of discharging a liquid that has entered the air cylinder from the outside through an air introduction path to the container body side.

The first means is a mounting member 2 having a mounting cylinder portion 4 that can be fitted to the mouth and neck of the container body, and having an inward flange 8 protruding inward from the upper portion of the mounting cylinder portion 4.
A cylinder member 14 suspended below the mounting member 2 and
The cylinder member 14 is provided with an actuating member 20 having a lower portion fitted into the cylinder member 14 so as to be able to move up and down in an upwardly urged state.
The cylinder member 14 is formed by vertically suspending a small-diameter liquid cylinder 14b from a large-diameter air cylinder 14a, and the operating member 20 is formed on a vertical tubular body 21 having a liquid piston 22 at the lower end. An air piston 32 provided so as to be able to move up and down the outer surface of the intermediate portion of the tubular body is linked, and a discharge head 37 is provided at the upper end portion of the tubular body 21, and the liquid cylinder 14b is provided with the liquid piston. The air piston 32 is fitted into the air cylinder 14a, and the air piston 32 is inserted into the air cylinder 14a, and the air pumped from the air cylinder 14a and the liquid pumped from the liquid cylinder 14b are mixed by lowering the operating member 20. In the foam discharger provided so as to be able to be discharged from the discharge head 37 as bubbles through the foaming unit 30.
An air introduction path A is formed along the inner surface of the mounting member 2.
The air piston 32 has an outside air introduction hole I opened in a part of a main partition wall 34 formed from the outer surface of the tubular body 21 to the inner surface of the air cylinder 14a.
Further, the air piston 32 is positioned above the elevating range of the air piston 32 so as to protrude from the outer surface of the tubular body 21 and to partition the space between the main partition wall 34 and the inward flange 8 vertically. A communication hole J is opened in a part of the partition wall 26, and the communication hole J is opened.
The outside air introduction hole I can be communicated to the outside through the communication hole J and the air introduction path A, and a part of the upper surface of the auxiliary partition wall 26 is recessed so that the communication hole J and the air can be communicated to the outside. A liquid reservoir 28 was formed so as to be located between the introduction paths A.

In this means, as shown in FIG. 1, an air introduction path A is formed along the inner surface of the mounting member 2, and the air piston 32 extends from the outer surface of the cylindrical body 21 to the inner surface of the air cylinder 14a. In a type of foam discharger in which an outside air introduction hole I is opened in a part of the formed main partition wall 34, the air piston 32 is first positioned above the elevating range of the air piston 32 and protrudes from the outer surface of the cylindrical body 21. At the same time, it is proposed to open a communication hole J in a part of the auxiliary partition wall 26 provided so as to partition the space between the main partition wall 34 and the inward flange 8 vertically.
As a result, when water or foreign matter enters the air cylinder 14a from the air introduction path A, the water or foreign matter enters the space (air chamber K) between the air piston 32 and the bottom of the air cylinder 14a from the outside air introduction hole I. You can regulate entry.
As the installation location of the air introduction path A, it is conceivable to first use the gap B between the guide cylinder portion 9 of the mounting member 2 and the operating member 20 as shown in FIG. 7. In this case, even when the foam discharge container equipped with the foam discharger is allowed to stand upright in a bathroom or the like, water from a shower or the like may flow down from the gap B and reach the outside air introduction hole I. ..
Further, as shown in FIG. 1, the guide cylinder portion 9 and the operating member are sealed by an appropriate sealing means (seal piece 10 in the illustrated example), and air is introduced along the inner surface of the mounting cylinder portion 4 of the mounting member 2. It is also conceivable to form a road A. In this case, water or foreign matter that has entered the air introduction path A while the foam discharge container is in the upright state does not directly enter the outside air introduction hole, but once in the low portion (outer peripheral portion 34c) of the main partition wall 34. The accumulated water or the like may reach the outside air introduction hole I by turning the foam discharge container upside down in the used state and returning it to the upright state.
By providing the auxiliary partition wall 26, the risk of water or the like entering the outside air introduction hole I can be reduced.
Further, in this means, it is proposed that a part of the upper surface of the auxiliary partition wall 26 is recessed to form a liquid reservoir 28 located between the communication hole J and the air introduction path A. As a result, since water and the like that have entered the liquid reservoir 28 are captured, the risk of water entering the outside air introduction hole I can be further reduced.

The "engagement strip" as used herein refers to a portion extending in the circumferential direction on the facing surface of the auxiliary partition wall and the main partition wall, which can abut on each other and block communication from the outside to the inside. do. In the illustrated example, the combination of the engaging concave groove and the engaging convex portion is illustrated, but for example, it is a combination of two annular engaging convex portions having slightly different diameters and has a large diameter engaging convex portion. The inner peripheral surface of the above and the outer peripheral surface of the small-diameter engaging convex portion may be provided so as to be in airtight contact with each other.
The "liquid reservoir" may have a function of storing liquid such as water flowing in from the outside air introduction path.
What is "air introduction path formed along the inner surface of the mounting member"?
(B) An air introduction path formed between the facing surfaces of the mounting member and the operating member, or
(B) Any of the air introduction paths formed between the mounting member and the facing surfaces of the container body and the cylinder member may be used.
It should be noted that the technical scope of the present invention also includes a configuration in which the seal piece 10 of the present application is omitted and outside air can be sucked from both air introduction paths.
The "outside air introduction hole" is an inlet for outside air to the air chamber. As a means of regulating the inflow of outside air according to the operation of the operating member,
(C) A blocking means including the first engaging strip and the second engaging strip shown in FIG. 1 and
(D) It is preferable to provide one or both of the check valves shown in FIG. 7.
The above-mentioned (a) and (b) and (c) and (d) can be appropriately combined.

The second means has the first means, and the liquid reservoir 28 is formed in the outer peripheral portion of the auxiliary partition wall 26 as an annular groove adjacent to the inner surface of the peripheral wall of the air cylinder 14a. The concave groove is formed between the outer side wall portion 26c and the inner side wall portion 26b which are a part of the auxiliary partition wall 26, and the first edge portion m1 which is the upper edge of the outer side wall portion 26c is formed on the inner side wall. It is arranged lower than the second edge m2, which is the upper edge of the portion 26b.
The upper edge m1 of the outer side wall portion 26c is in sliding contact with the inner surface of the peripheral wall of the air cylinder 14a.
A through hole 15 is opened in a part of the peripheral wall forming the air cylinder 14a so as to be located below the liquid reservoir 28, and the operating member 20 is pushed down to make the liquid reservoir 28 at least a through hole. The first edge portion m1 is provided so as to be able to descend to the forming portion of 15 and to be lower than the upper end of the through hole 15 in this descending state.

In this means, as shown in FIG. 2, the liquid reservoir 28 is formed in the outer peripheral portion of the auxiliary partition wall 26 as an annular groove adjacent to the inner surface of the peripheral wall of the air cylinder 14a, and the annular groove is an auxiliary groove. It is formed between the outer side wall portion 26c and the inner side wall portion 26b which are a part of the partition wall 26, and the first edge portion m1 which is the upper edge of the outer side wall portion 26c is above the inner side wall portion 26b. It is arranged lower than the second edge m2, which is the edge.
Further, a through hole 15 is opened in a part of the peripheral wall forming the air cylinder 14a so as to be located below the liquid reservoir 28. Thereby, when the excess liquid enters the liquid reservoir portion, the excess liquid exceeding the level of the first edge portion m1 can be discharged to the container body side (see FIG. 6). By making the through hole 15 a long hole in the vertical direction, it is possible to add a function as an air / liquid replacement hole in which liquid is discharged from the lower part of the long hole and air enters from the upper part of the long hole. The liquid can be discharged more smoothly.

The third means has an annular second engaging strip 36, which has a first means or a second means and is provided around the main partition wall 34 so as to surround the tubular body 21, and the auxiliary. The first engaging strip 27 provided around the lower surface of the partition wall 26 is formed so as to be in close contact with each other when the operating member 20 is pushed down, and the communication hole J is formed with the first engaging strip 27. By arranging the outside air introduction hole I on the outside and inside the second engaging strip 36, the communication hole J is in contact with the first engaging strip 27 and the second engaging strip 36. A blocking means V for blocking communication from the outside air introduction hole I to the outside air introduction hole I was provided.

In this means, instead of arranging the outside air introduction valve body in the outside air introduction hole I, the annular second engaging strip 36 around the main partition wall 34 so as to surround the tubular body 21 and the auxiliary partition wall. The first engaging strips 27 and the second engaging strips 27 are formed so that the first engaging strips 27 provided around the lower surface of the 26 are in close contact with each other when the operating member 20 is pushed down. A blocking means V for blocking communication from the communication hole J to the outside air introduction hole I in the contact state of the strip 36 is provided. However, the communication hole J is arranged outside the first engaging article 27, and the outside air introduction hole I is arranged inside the second engaging article 36.

The fourth means has any one of the first to third means, and the hole tube portion j is erected from the hole edge of the communication hole J.

In this means, the hole tube portion j stands up from the hole edge of the communication hole J. This makes it possible to regulate the flow of water from the communication hole.

The fifth means has any of the first to fourth means, and the outside air introduction valve body is attached to the outside air introduction hole I to form the first air check valve body VA1.

In this means, the outside air introduction valve body is attached to the outside air introduction hole I to form the first air check valve body VA1. Thereby, the inflow of outside air can be suitably controlled.

According to the invention according to the first means, the air introduction path A is formed along the inner surface of the mounting member 2, and the air piston 32 is formed from the outer surface of the cylindrical body 21 of the operating member to the inner surface of the air cylinder 14a. An outside air introduction hole I is opened in a part of the main partition wall 34 formed over the entire surface, and the outside air introduction hole I is positioned above the elevating range of the air piston 32 so as to protrude from the outer surface of the cylindrical body 21 and the main partition wall 34. A communication hole J is opened in a part of an auxiliary partition wall 26 provided so as to partition the space between the inward facing flange 8 and the outside air introduction hole I vertically, and the outside air introduction hole I is formed through the communication hole J and the air introduction path. Since it is possible to communicate to the outside through A, it is difficult for the water infiltrated from the air introduction path A to reach the outside air introduction hole I immediately as compared with the case without the auxiliary partition 26, and the auxiliary partition 26 By recessing a part of the upper surface, a liquid reservoir 28 is formed so as to be located between the communication hole J and the air introduction path A, so that water or liquid foreign matter flowing into the air introduction path A can be removed. Since the one that has entered the liquid reservoir 28 is captured, the risk of inundation from the outside flowing into the outside air introduction hole I can be further reduced.
According to the invention according to the second means, the liquid reservoir 28 is formed in the outer peripheral portion of the auxiliary partition wall 26 as an annular groove adjacent to the inner surface of the peripheral wall of the air cylinder 14a, and the annular groove is an auxiliary groove. A first edge portion m1 which is an upper edge of the outer side wall portion 26c is formed above the inner side wall portion 26b while being formed between the outer side wall portion 26c and the inner side wall portion 26b which are a part of the partition wall 26. Since it is placed lower than the second edge portion m2, which is the edge, when the liquid reservoir 28 is lowered to at least the formation location of the through hole 15 by pushing down the operating member 20, it accumulates in the liquid reservoir 28 formation location. The excess water can be discharged to the container body 100 side through the through hole 15.
According to the invention according to the third means, the annular second engaging strip 36 is provided around the main partition 34 so as to surround the tubular body 21, and the auxiliary partition 26 is provided around the lower surface of the auxiliary partition 26. The first engaging strip 27 is formed so as to be in close contact with each other when the operating member 20 is pushed down, and the communication hole J is provided on the outside of the first engaging strip 27 and the outside air introduction hole. By arranging I inside the second engaging strip 36, communication from the communication hole J to the outside air introduction hole I in the contact state of the first engaging strip 27 and the second engaging strip 36 can be achieved. Since the shutoff means V for shutting off is provided, the inflow of outside air can be controlled without attaching the outside air introduction valve body to the outside air introduction port.
In the fourth means, since the hole tube portion j is erected from the hole edge of the communication hole J, the flow of water from the communication hole can be restricted.
In the fifth means, since the outside air introduction valve body is attached to the outside air introduction hole I to form the first air check valve body VA1, the inflow of outside air can be suitably controlled.

It is a vertical sectional view of the foam discharger which concerns on embodiment of this invention. It is an enlarged view of the main part of the foam discharger of FIG. It is explanatory drawing which shows the 1st stage of the use state of the foam discharger of FIG. It is explanatory drawing which enlarges and shows a part of the stage shown in FIG. It is explanatory drawing which shows the 2nd stage of the use state of the foam discharger of FIG. It is explanatory drawing which shows the 3rd stage of the use state of the foam discharger of FIG. It is a vertical sectional view which shows the modification of the foam discharger which concerns on embodiment of this invention.

1 to 7 show a foam ejector according to an embodiment of the present invention.
This foam discharger includes a mounting member 2, a cylinder member 14, an operating member 20, and a poppet valve body 38. Each of these members can be formed of, for example, a synthetic resin or a metal.

The mounting member 2 has a mounting cylinder portion 4 for fitting the container body 100 to the mouth and neck portion 101, and an inward flange 8 extends from the upper end edge of the mounting cylinder portion 4. On the inner surface of the illustrated mounting cylinder portion 4, a screw portion 6 for screwing to the outer surface of the mouth neck portion 101 is formed. Further, in the present embodiment, the guide cylinder portion 9 stands up from the inner peripheral portion of the inward flange 8.
In the present embodiment, the gap B between the guide cylinder portion 9 and the outer peripheral surface of the operating member 20 is airtightly closed, and an air introduction path A extending along the inner surface of the mounting member 2 is formed.
First, as shown in FIG. 2, the guide cylinder portion 9 is formed with an annular cut groove 9a at a constant depth from the upper end surface of the cylinder wall at a certain distance from the inner edge of the guide cylinder portion. The upper end of the guide cylinder 9 has a double cylinder shape. Then, the inner cylinder wall portion of the cut groove 9a is formed in a tapered seal piece 10 having a small diameter at the upper end, and the upper end portion of the seal piece 10 is slidable and airtight on the outer peripheral surface of the operating member 20. It is pressure-tightened. This makes it possible to prevent water and foreign matter from entering through the gap B. These structures can be adapted as appropriate.
As shown in FIG. 2, the air introduction path A includes a vertical passage A1 formed on the inner surface of the mounting cylinder portion 4 and a horizontal passage A2 formed on the outer periphery of the lower surface of the inward flange. As shown in FIG. 2, the vertical passage A1 linearly cuts off a part of the threaded portion in the circumferential direction, and the vertical groove portion 7 is formed on the inner surface of the cylinder wall of the mounting cylinder portion 4 so as to be aligned with the cutout portion 6a. It is made by drilling. However, this structure may be changed as appropriate, and for example, a cutout portion may be provided in the threaded portion on the outer surface of the mouth and neck portion 101 of the container body 100. The side passage A2 will be described later.

The cylinder member 14 has a large-diameter air cylinder 14a having an upper end portion fixed to the outer peripheral portion of the back surface of the mounting member 2, and a small-diameter liquid cylinder 14b extends from the lower portion of the air cylinder 14a. In a preferred illustrated example, as shown in FIG. 2, a flange portion 14c attached to the upper end of the air cylinder 14a is sandwiched between the mouth neck portion 101 and the inward flange 8 via a packing 18. A tubular spacer 14d is erected from the flange portion 14c of the illustrated example, and the flange portion with the tubular spacer is sandwiched between the mouth neck and the inward flange together with the packing. A ventilation hole (not shown) forming the lateral passage A2 may be provided in a part of the tubular spacer in the circumferential direction.
A through hole 15 is opened in the upper portion of the peripheral wall of the air cylinder 14a. This through hole will be described later.
The liquid cylinder 14b has a tapered bottom portion having a small diameter at the lower end continuous with the upper straight cylinder portion, and the upper surface of this bottom portion is used as the first liquid valve seat 16. Further, a pipe fitting cylinder 14e for attaching the suction pipe 19 is integrally hung from the bottom portion.
From the tapered portion to the lower end portion of the straight cylinder portion, a plurality of locking ribs 17 having an upward step portion for spring locking are provided inwardly from the inner peripheral surface of the liquid cylinder 14b.

In the present embodiment, the actuating member 20 includes a tubular body 21, an air piston 32, and a discharge head 37.

In the present specification, the tubular body 21 is a vertical tubular member that protrudes outward from an auxiliary partition wall described later from the outer peripheral surface. In the present embodiment, as shown in FIG. 2, the tubular body 21 is formed of a liquid piston 22, a piston guide 23, a stem 24, and a holding cylinder 29, but these structures are appropriately changed. It is also possible to include the mounting cylinder portion of the discharge head, which will be described later.

The liquid piston 22 has a sliding cylinder portion 22b that expands in a skirt shape from the lower end of the vertically oriented fitting cylinder portion 22a, and from the upper end of the fitting cylinder portion 22a, the third liquid valve seat 22c. The small-diameter cylinder part is projected upward. A coil spring c is interposed between the small-diameter cylinder portion and the upward step portion of the locking rib 17. Further, the sliding cylinder portion 22b is slidably fitted to the inner surface of the liquid cylinder 14b.

The piston guide 23 is a cylinder having upper and lower ends open, and the lower half of the cylinder is fitted with the liquid piston 22 on the outer surface of the fitting cylinder 22a so that the sliding cylinder 22b protrudes below the cylinder wall. An air piston 32, which will be described later, which slides on the inner surface of the air cylinder 14, is linked to the upper half of the cylinder so that the inside of the cylinder member 4 can move up and down.
An annular valve seat 23b is formed in the upper half of the cylinder wall 23a of the piston guide 23, and a check valve VL2 for the second liquid is formed by placing a ball valve b on the valve seat.
Further, a plurality of first vertical ridges 23c are vertically provided on the inner surface of the piston guide between the annular valve seat 23b and the third liquid valve seat 22c. Further, the air valve seat 23e is projected from the middle portion in the vertical direction of the outer surface in the shape of an outward flange. Further, on the upper side of the air valve seat 23e, a plurality of second vertical ridges 23d are formed on the outer periphery of the piston guide 23, and as shown in FIG. 2, with the tubular valve portion 33 of the air piston 32 described later. It is provided so that a gap g1 is formed between them.

The stem 24 has a vertical cylinder portion 25 that connects the piston guide 23 and the discharge head 37. In the illustrated example, the vertical cylinder portion 25 is formed so as to hang down the lower cylinder portion 25c having a large inner diameter from the upper cylinder portion 25a having a small inner diameter through the intermediate cylinder portion 25b, and the cylinder wall 23a of the piston guide 23. The upper part of the above is fitted to the inner surface of the intermediate cylinder portion 25b, and the upper cylinder portion 25a of the vertical cylinder portion 25 is fitted to the inner surface of the mounting cylinder portion 37b of the discharge head 37 described later. Further, the lower tubular portion 25c is fitted to the outer surface of the upper portion of the tubular valve portion 33, which will be described later, so as to be able to move up and down. The step e between the intermediate tubular portion 25b and the lower tubular portion 25c limits the sliding range of the tubular valve portion 33 described later.
A plurality of vertical grooves g2 extending upward are formed on the inner peripheral surface of the intermediate cylinder portion 25b. The lower end of the vertical groove g2 communicates with the upper end of the gap g1, and the vertical groove g2 and the gap g1 form a ventilation flow path G. Further, the upper end portion of the vertical groove g2 opens inward in the radial direction and communicates with the gas-liquid mixing chamber R formed in the upper portion of the piston guide 23. This will be described later.
The upper half cylinder portion 29b of the holding cylinder 29, which will be described later, is fitted to the lower portion of the upper cylinder portion 25a. Above the upper half cylinder portion, a plurality of vertical ribs r are vertically provided on the inner surface of the upper cylinder portion 25a to prevent the foaming portion 30 from coming out upward.
An auxiliary partition wall 26 is projected outward from the lower end of the vertical cylinder portion 25, which will be described later.

In the holding cylinder 29, the lower half cylinder portion 29a is fitted in the upper end portion of the piston guide 23, and the upper half cylinder portion 29b is projected upward above the piston guide.
In the upper half cylinder portion 29b, a foaming portion 30 made of a single or a plurality of cylinders having a mesh stretched on the cylinder mouth is mounted.
The lower half cylinder portion 29a is close to the ball valve b as a valve body pressing means. A flow path groove u communicating with the ventilation flow path G is formed on the outer surface of the lower half cylinder portion 29a.

The air piston 32 has a tubular valve portion 33 surrounding the piston guide 23, and the tubular piston 35 extends from the outer periphery of the tubular valve portion 33 via a stepped main partition wall 34. The tubular piston 32 is slidably fitted to the inner circumference of the air cylinder 14a so that the air chamber K is formed between the air piston 32 and the bottom of the air cylinder 14a.
The main partition wall 34 in the illustrated example is configured to be sequentially lowered from the inner peripheral portion 34a to the outer peripheral portion 34c via the intermediate portion 34b. An outside air introduction hole I is opened in the inner peripheral portion 34a. In the existing foam discharger including Patent Document 1, an outside air introduction valve body that opens and closes the outside air introduction hole is attached to the lower surface of the inner peripheral portion, but in the present invention, the provision of the valve body is omitted. Instead, a blocking means V, which will be described later, is provided.
The tubular valve portion 33 is provided so as to move up and down with a relatively small width between the air valve seat 23e and the step e of the vertical tubular portion 25 on the outer peripheral surface of the piston guide 23.
The lower end of the tubular valve portion 33 is in contact with the air valve seat 23e, and the tubular valve portion 33 and the air valve seat 23e form a check valve VA for air. On the downstream side of the air check valve VA, a gap g1 which is a part of the ventilation flow path G is formed between the tubular valve portion 33 and the cylindrical wall 23a of the piston guide 23.

The discharge head 37 has a mounting cylinder portion 37b suspended from the center of the back surface of the top plate 37a, and the mounting cylinder portion 37b is fitted to the outer peripheral portion of the stem 24 and the mounting cylinder portion 37b is fitted to the outer peripheral portion of the stem 24. The nozzle 37c is projected laterally from the upper part of the 37b.
A vertical rib-shaped stopper 37d is provided so as to project from the outer surface of the upper end portion of the mounting cylinder portion 37b so that the stopper 37d abuts on the upper end of the guide cylinder portion 9 at the lower limit position of the operating member 20.
In a preferred illustrated example, the stopper member T shown by the imaginary line in FIG. 1 may be detachably provided with respect to the mounting cylinder portion 37b between the guide cylinder portion 9 and the back surface side of the discharge head 37.

The poppet valve body 38 has a plurality of locking protrusions 38a provided at the lower end thereof and a tapered valve body 38b formed on the upper end side thereof.
Each of the locking protrusions 38a is projected between the locking ribs 17 of the liquid cylinder 14b to a position where it can come into contact with the lower surface of the coil spring C. As a result, the poppet valve body 38 can move up and down between the position where the locking protrusion abuts on the coil spring and the position where the lower surface of the poppet valve body 38 abuts on the first liquid valve seat 16. Is. A check valve VL1 for the first liquid is formed by the lower end portion of the poppet valve body 38 and the valve seat 16 for the first liquid.
The tapered valve body 38b is locked to the third liquid valve seat 22c. A check valve VL3 for the third liquid is formed by the tapered valve body 38b and the valve seat 22c for the third liquid.

When the discharge head 37 is pushed down from the state shown in FIG. 1, the piston guide 23 and the liquid piston 22 are lowered. Therefore, the poppet valve body 38 is also lowered and seated on the first liquid valve seat 16 to reverse the first liquid. The check valve VL1 closes. Further, the liquid piston 22 descends with respect to the poppet valve body 38 to open the third liquid check valve VL3 and the second liquid check valve VL2. Then, the high-pressure liquid in the liquid cylinder flows into the gas-liquid mixing chamber R. Further, when the discharge head 37 is pushed down, the piston guide 23 descends relative to the air piston 32, so that the air check valve VA opens and the air in the air cylinder 14a is aired through the ventilation flow path G. It flows into the liquid mixing chamber R. Then, after the air and the liquid are mixed in the gas-liquid mixing chamber R, the air and the liquid pass through the foaming portion 30 and the bubbles are discharged from the nozzle 37c.
When the push-down of the discharge head 37 is released, the operating member 20 rises due to the upward urging force of the coil spring C, and the hydraulic pressure drops, so that the check valve VL2 for the second liquid closes and the coil spring C closes. The poppet valve body 38 in contact with the upwardly urged liquid piston 22 is pulled up, the first liquid check valve VL1 opens, the inside of the liquid cylinder 14b becomes negative pressure, and the liquid in the container body 100 is sucked. .. Further, the piston guide 23 assembled to the liquid piston 22 rises in advance of the air piston 32 to close the air check valve VA, and then the air piston 32 rises together with the piston guide 23 to cause air. The inside of the cylinder 14a is made negative pressure, and outside air is introduced. The mechanism for introducing outside air will be described later.

In the present invention, the auxiliary partition wall 26 protrudes outward from the lower part of the vertical cylinder portion 25 of the stem 24. However, this configuration can be changed as appropriate. For example, instead of omitting the stem, the mounting cylinder portion is hung long as a part of the tubular body 21 from the main body of the discharge head 37, and the lower portion of the mounting cylinder portion is lowered. It is connected to the upper part of the piston guide, and a separate fitting cylinder part (not shown) is inserted between the mounting cylinder part and the guide cylinder part to fit it to the lower part of the mounting cylinder part. The auxiliary wall portion may be projected outward from the lower end of the fitting cylinder portion. In this case, the fitting cylinder portion also becomes a part of the tubular body. However, the auxiliary partition wall 26 shall be installed so as to be located above the elevating range of the air piston 32.

The auxiliary partition wall 26 extends from the outer surface of the tubular body 21 of the operating member 20 to the inner surface of the peripheral wall of the air cylinder 14a so as to further partition the space between the main partition wall 34 and the inward flange 8 in the vertical direction. It extends, and the outer peripheral end of the auxiliary partition wall 26 is airtightly brought into contact with the inner surface of the air cylinder 14a. The auxiliary partition wall 26 has a communication hole J for allowing the air introduction path A to communicate with the outside air introduction hole I, and further has a first engagement strip 27 and a liquid reservoir 28.

The liquid storage portion 28 is formed by recessing a part of the auxiliary partition wall 26 so that even if a liquid such as water flows in from the air introduction path A or the like, the liquid storage portion 28 can be stored.
The shape of the liquid reservoir 28 is arbitrary, but if it is formed in a loop shape extending in the circumferential direction of the auxiliary partition wall 26 when viewed from above, it is easy to design the water reservoir volume of the liquid reservoir 28 to be sufficiently large.
The position of the liquid reservoir 28 is also arbitrary, but if the liquid reservoir 28 is arranged near the outer periphery of the auxiliary partition wall 26, it is easy to design a large depth of the liquid reservoir 28. This is because, as described above, the outer peripheral portion 34c of the main partition wall 34 is provided lower than the inner peripheral portion 34a and the intermediate portion 34b, so that even if the liquid reservoir portion 28 is made deeper to some extent, the main partition wall 34 This is because it does not touch the outer peripheral portion 34c.
The liquid reservoir 28 of the present embodiment is formed as an annular groove adjacent to the inner surface of the peripheral wall of the air cylinder 14a. This annular groove can be formed between the inner side wall portion 26b (leg tube portion) and the outer side wall portion 26c (folded wall portion) that are a part of the auxiliary partition wall 26.
The illustrated auxiliary partition wall 26 has an outward flange-shaped wall portion 26a extending outward from the inner peripheral portion 34a and the intermediate portion 34b of the main partition wall 34 from the outer periphery of the tubular body 21, and the outward flange-shaped wall portion 26a. The leg cylinder portion 26b corresponding to the inner side wall portion is vertically hung from the outer peripheral end of the above, and the folded wall portion 26c corresponding to the outer side wall portion is projected diagonally upward from the lower end side of the leg cylinder portion 26b. The tip of the folded wall portion 26c is slidably contacted with the inner surface of the peripheral wall of the air cylinder 14a. The first edge portion m1 which is the upper edge of the folded wall portion 26c is provided lower than the second edge portion m2 which is the upper edge of the leg tube portion 26b. This is to enable the excess liquid to be discharged into the container body 100 from the through hole 15 of the air cylinder 14a. This will be described later.
In the present embodiment, the liquid reservoir portion 28 is located above the tubular piston 35.
Although not shown, a plurality of slits formed by cutting downward from the upper end of the folded wall portion 26c in the circumferential direction may be formed in the upper portion of the folded wall portion 26c. By doing so, the sliding contact point between the folded wall portion 26c and the inner surface of the air cylinder 14a is shortened, and the sliding resistance can be reduced.

The communication hole J is opened in a part of the auxiliary partition wall 26, in the illustrated example, near the outer periphery of the outward flange-shaped wall portion 26a.
The position of the communication hole J is arbitrary, but when the first engagement strip 27 and the second engagement strip 36, which will be described later, are provided, the communication hole J is provided on one of both sides of both engaging strips, and the outside air is on the other. Arrange so that the introduction hole I is located. This is to prevent communication from the communication hole J to the outside air introduction hole I when the two engaging strips are in airtight contact with each other.
In the case of the present embodiment, since the outside air introduction hole I is arranged inside the first engaging strip 27 and the second engaging strip 36 (inner peripheral portion 34a of the main partition wall 34), the communication hole J is It is arranged outside the first engaging strip 27 and the second engaging strip 36. In a preferred illustrated example, the communication hole J is arranged near the outer peripheral end of the outward flange-shaped wall portion 26a.
Further, in a suitable illustrated example, a cylindrical hole tube portion j is erected from the hole edge of the communication hole J. This is to prevent water from flowing into the communication hole J when water adheres to the upper surface of the outward flange-shaped wall portion 26a.

The first engaging strip 27, together with the second engaging strip 36 of the main partition wall 34, provides a blocking means V that opens and closes the passage from the communication hole J to the outside air introduction hole I as the operating member 20 moves up and down. Form.
In the present embodiment, the second engaging strip 36 is attached to the intermediate portion 34b of the main partition wall 34, and the first engaging strip 27 is attached to a portion of the auxiliary partition wall 26 facing the intermediate portion due to the lowering of the actuating member 20. It is provided so as to be in close contact with each other.
Further, in the present embodiment, the first engaging strip 27 is formed in the annular engaging convex portion P hanging from the auxiliary partition wall 26, and the second engaging strip 36 is formed in the annular engaging concave groove D. However, even if the first engaging strip 27 is formed as an engaging concave groove recessed in the lower surface of the auxiliary partition wall 26 and the second engaging strip 36 is formed in the engaging convex portion protruding upward from the upper surface of the main partition wall 34. I do not care.
In a preferred illustrated example, the stepped wall portion S between the intermediate portion 34b and the outer peripheral portion 34c of the main partition wall 34 is extended upward, and the side surface of the extension portion s is referred to the outer peripheral surface d1 of the engaging concave groove D. At the same time, the side surface of the step between the intermediate portion 34b and the inner peripheral portion 34a is designated as the inner peripheral surface d2 of the engaging concave groove D.
Then, when the operating member 20 is lowered, the engaging convex portion P, which is the first engaging strip 27, abuts on the outer peripheral surface d1 of the engaging concave groove D and is formed so as to engage with the outer peripheral surface d1. As a result, an airtight close contact state is realized over the entire circumference of the first engaging article 27 and the second engaging article 36, and the communication from the air introduction path A to the outside air introduction hole I is cut off.
The outer peripheral surface d1 of the engaging groove D in the figure is an inclined surface that inclines upward and outward, so that even if there is some error in molding the first engaging strip 27 and the second engaging strip 36, , The function of blocking communication to the outside air introduction hole I is not impaired.
In the illustrated example, as shown in FIG. 4, the design is such that a distance is taken between the engaging convex portion P and the inner peripheral surface d2 of the engaging concave groove D in the inserted state of the engaging convex portion P. .. Further, a vertical rib d3 is provided around the inner peripheral surface d2 of the engaging concave groove D.
The engaging convex portion P may be provided so as to engage with the inner peripheral surface d2 of the engaging concave groove D instead of the outer peripheral surface d1 of the engaging concave groove D. In this case, the vertical rib d3 shall be omitted. Further, the engaging convex portion P may be provided so as to mesh with both the outer peripheral surface d1 of the engaging concave groove D and the inner peripheral surface d2 of the engaging concave groove D.
Since the blocking means V for blocking the communication from the air introduction path A to the outside air introduction hole I is provided by the combination of the first engagement section 27 and the second engagement section 36, the outside air introduction hole I is provided as in the prior art. It is not necessary to install the outside air introduction valve body, which saves the trouble of installation work and eliminates the inconvenience that the valve function is impaired due to the outside air introduction valve body falling off. Further, since the first engaging strip 27 is integrally molded as a part of the auxiliary partition wall 26 and the second engaging strip 36 is integrally molded as a part of the main partition wall 34, it is compared with the case where the outside air introduction valve body is attached as a separate part. Therefore, the number of parts can be reduced.

In order to realize the above-mentioned liquid discharge function, the through hole 15 is provided in a range in which the liquid reservoir portion moves up and down in the ascending / descending stroke of the operating member 20. The normal through-hole 15 provided in the air cylinder 14a allows air to enter and exit, but the through-hole 15 according to the embodiment of the present embodiment also has a function of discharging a liquid, and therefore has a relatively large area. There is a need to. The through hole 15 is preferably an elongated hole in the vertical direction as a replacement hole for air and liquid, but may be a round hole or the like.

In the above configuration, in the state shown in FIG. 1, the first engaging strip 27 and the second engaging strip 36 are separated, and the air introduction path A and the outside air introduction hole I communicate with each other through the communication hole J. .. In this state, even if water enters the upper side of the main partition wall 34 through the air introduction path A, the auxiliary partition wall 26 covers the upper part of the main partition wall 34, so that it is difficult for water to enter the outside air introduction hole I.
In the present embodiment, the air introduction path A is formed so as to open from between the inward flange 8 and the upper end of the peripheral wall of the air cylinder 14a into the upper part of the air cylinder along the inner surface of the mounting cylinder portion 4. Even if water enters from the air introduction path A, the water flows down along the inner surface of the peripheral wall of the air cylinder and collects in the liquid reservoir 28. As shown in FIG. 4, even if the water level L of the stored water exceeds the first edge portion m1 of the liquid reservoir portion 28, the upper end of the folded wall portion 26c is in close contact with the inner surface of the peripheral wall of the air cylinder 14a, so that the folded wall portion 26c is folded back. Liquid does not enter the air chamber K from between the wall portion and the air cylinder 14a.
When the discharge head 37 is pushed down from the state shown in FIG. 1, the cylindrical body 21 descends more greatly with respect to the air piston 32. Therefore, as described above, the air check valve VA opens and the first engagement strip 27 The second engaging strip 36 abuts against each other, and the communication from the air introduction path A to the outside air introduction hole I is cut off (see FIG. 3). When the discharge head 37 is further pushed down in this state, the pressure inside the air chamber K becomes high, so that the air in the air chamber K is the air check valve VA and the ventilation flow path G as shown in FIG. It enters the gas-liquid mixing chamber R through the air-liquid mixing chamber R.
When the push-down of the discharge head 37 is released, as shown in FIG. 6, the tubular body 21 rises with respect to the air piston 32, so that the air check valve VA closes and the first engagement strip 27 and the first engagement strip 27 and the second. 2 The engaging strip 36 separates. Then, due to the negative pressure in the air chamber K, the outside air is sucked into the outside air introduction hole I from the air introduction path A through between the main partition wall 34 and the auxiliary partition wall 26.
In the lowering process and the ascending process of the operating member 20, when the liquid reservoir 28 passes through the through hole 15 forming portion of the air cylinder 14a, the water level L of the stored water passes through the first edge portion m1 of the liquid reservoir 28. When it exceeds, the excess liquid exceeding the level of the first edge m1 is discharged into the container body 100 through the through hole 15. The situation at this time is shown in FIG. When the inside of the container is in a negative pressure state, the liquid in the liquid reservoir enters the inside of the container along with the drawing of air from the inside of the air cylinder into the inside of the container. By making the through hole 15 a long hole, the liquid can be smoothly discharged.

FIG. 7 shows a modified example of the present embodiment.
In this example, an outside air introduction valve body, which is a separate body, is provided on the lower surface side of the outside air introduction hole I, thereby forming the first air check valve VA1. In this example, the air check valve in the first embodiment is referred to as a second air check valve VA2.
Further, in this example, instead of the guide cylinder portion 9 with the seal piece in FIG. 1, a guide cylinder portion 9 having no seal piece is provided, and the inner surface of the guide cylinder portion 9 and a part of the operating member 20 (illustration example). The gap B between the vertical cylinder portion 25 of the stem and the outer surface of the mounting cylinder portion 37b of the discharge head) is defined as the air introduction path A. Therefore, in the configuration of the first embodiment, the structure of the vertical flow path (removal portion 6a and the vertical groove portion 7) formed on the inner surface of the mounting cylinder portion 4 is omitted, and a normal screw structure is used. The structure of the horizontal groove portion continuous with the vertical flow path is also omitted.
In the embodiment in which the gap between the outer surface of the actuating member 20 and the inner surface of the guide cylinder portion 9 is the air introduction path A, when the outside air introduction hole I is opened in the inner peripheral portion 34a of the main partition wall 34 of the air piston 32 described above. , Liquid easily enters the air chamber from this outside air introduction hole.
In order to solve this, in the present invention, the auxiliary partition wall 26 protrudes outward from the lower portion of the vertical cylinder portion 25 of the stem to the outside from the intermediate portion 34 b of the main partition wall 34, whereby the outer surface of the operating member and the outer surface thereof are formed. The flowing water can be guided from the gap with the guide cylinder portion to the outer peripheral portion 34c of the main partition wall 34 via the upper surface of the outward flange-shaped wall portion 26a . Since the outer peripheral portion 34c is formed lower than the inner peripheral portion 34a and the intermediate portion 34b of the main partition wall 34, the water that has fallen into the outer peripheral portion 34c can be kept away from the outside air introduction hole I, and therefore the outside air introduction hole I. The possibility of flooding can be reduced.
In the present embodiment, by making the upper surface of the outward flange-shaped wall portion 26a an inclined surface downward and outward, the liquid flowing from the air introduction path A in the guide cylinder portion 9 is transmitted through the inclined surface. It is possible to facilitate the flow to the liquid reservoir 28.

2 ... Mounting member 4 ... Mounting cylinder
6 ... Screw part 6a ... Missing part 7 ... Vertical groove part 8 ... Inward flange
9 ... Guide tube 9a ... Cut groove 10 ... Seal piece
14 ... Cylinder member 14a ... Air cylinder 14b ... Liquid cylinder 14c ... Flange 14d ... Cylindrical spacer 14e ... Pipe fitting cylinder 15 ... Through hole 16 ... First liquid valve seat 17 ... Locking rib 18 ... Packing 19 ... Suction pipe 20 ... Acting member 21 ... Cylindrical body 22 ... Liquid piston 22a ... Fitting cylinder part 22b ... Sliding cylinder part 22c ... Third liquid valve seat 23 ... Piston guide 23a ... Cylinder wall 23b ... Circular valve Seat 23c ... 1st vertical ridge 23d ... 2nd vertical ridge 23e ... Air valve seat 24 ... Stem 25 ... Vertical cylinder 25a ... Upper cylinder 25b ... Intermediate cylinder 25c ... Lower cylinder 26 ... Auxiliary partition 26a ... Outward flange-shaped wall part 26b ... Leg cylinder part (inner side wall part)
26c ... Folded wall part (outer side wall part)
27 ... First engaging strip 28 ... Liquid reservoir 29 ... Holding cylinder 29a ... Lower half cylinder 29b ... Upper half cylinder 30 ... Foaming part 32 ... Air piston 33 ... Cylindrical valve 34 ... Main partition 34a ... Inside Peripheral part 34b ... Intermediate part 34c ... Outer peripheral part 35 ... Cylindrical piston 36 ... Second engagement strip 37 ... Discharge head 37a ... Top plate 37b ... Mounting cylinder part 37c ... Nozzle 37d ... Stopper
38 ... Poppet valve body 38a ... Locking protrusion, 38b ... Tapered valve body 100 ... Container body 101 ... Mouth neck 101a ... Vertical groove 102 ... Second screw part 102a ... Missing part A ... Air introduction path A1 ... Vertical Passage A2 ... Horizontal passage B ... Gap b ... Ball valve c ... Coil spring D ... Engagement concave groove d1 ... Outer peripheral surface d2 ... Inner peripheral surface d3 ... Vertical rib e ... Step G ... Ventilation flow path g1 ... Gap g2 ... Vertical Groove K ... Air chamber I ... Outside air introduction hole J ... Communication hole j ... Hole tube part m1 ... First edge part m2 ... Second edge part P ... Engagement convex part R ... Gas-liquid mixing chamber r ... Vertical rib S ... Step Wall part s ... Extension part T ... Stopper member u ... Flow path groove V ... Shutoff means VA ... Check valve for air VA1 ... Check valve for first air VA2 ... Check valve for second air VL1 ... For first liquid Check valve VL2 ... Check valve for 2nd liquid VL3 ... Check valve for 3rd liquid

Claims (5)

A mounting member (2) having a mounting cylinder portion (4) that can be fitted to the mouth and neck of the container body, and having an inward flange (8) protruding inward from the upper portion of the mounting cylinder portion (4).
The cylinder member (14) suspended below the mounting member (2) and
A cylinder member (14) is provided with an operating member (20) having a lower portion fitted into the cylinder member (14) so as to be able to move up and down in an upwardly urged state.
The cylinder member (14) is formed by vertically suspending a small-diameter liquid cylinder (14b) from a large-diameter air cylinder (14a), and the operating member (20) has a liquid piston (22) at the lower end. An air piston (32) provided so as to be able to move up and down the outer surface of the intermediate portion of the tubular body is linked to the vertical tubular body (21), and a discharge head is provided at the upper end of the tubular body (21). (37) is provided, and the liquid piston (22) is fitted into the liquid cylinder (14b), and the air piston (32) is fitted into the air cylinder (14a). By the descent of (20), the air pressure-fed from the air cylinder (14a) and the liquid pressure-fed from the liquid cylinder (14b) are mixed, and the discharge head ( 37 ) is made into bubbles through the foaming portion (30). ) In the foam ejector provided so that it can be ejected from
An air introduction path (A) is formed along the inner surface of the mounting member (2).
The air piston (32) opens an outside air introduction hole (I) in a part of a main partition wall (34) formed from the outer surface of the tubular body (21) to the inner surface of the air cylinder (14a). Cylinder,
Further, it is positioned above the elevating range of the air piston (32) and protrudes from the outer surface of the tubular body (21), and at the same time , a space between the main partition wall (34) and the inward flange (8) is provided. A communication hole (J) is opened in a part of the auxiliary partition wall (26) provided so as to partition the upper and lower parts.
The outside air introduction hole (I) can be communicated to the outside through the communication hole (J) and the air introduction path (A), and a part of the upper surface of the auxiliary partition wall (26) is recessed . A foam discharger having a liquid reservoir (28) formed between the communication hole (J) and the air introduction path (A) . The liquid reservoir (28) is formed in the outer peripheral portion of the auxiliary partition wall (26) as an annular groove adjacent to the inner surface of the peripheral wall of the air cylinder (14a), and the annular groove is formed in the auxiliary partition wall (26). A first edge portion (m1) which is an upper edge of the outer side wall portion (26c) is formed between the outer side wall portion (26c) and the inner side wall portion (26b) which are a part thereof. It is arranged lower than the second edge portion (m2) which is the upper edge of the side wall portion (26b).
The upper edge (m1) of the outer side wall portion (26c) is slidably contacted with the inner surface of the peripheral wall of the air cylinder (14a).
A part of the peripheral wall forming the air cylinder (14a) is positioned below the liquid reservoir (28) to open a through hole (15) and push down the operating member (20). The liquid reservoir (28) can be lowered to at least the position where the through hole (15) is formed, and the first edge portion (m1) is provided so as to be lower than the upper end of the through hole (15) in this lowered state. The foam ejector according to claim 1, wherein the foam discharger is characterized in that. An annular second engaging strip (36) is provided around the main partition (34) so as to surround the tubular body (21), and a first engagement is provided around the lower surface of the auxiliary partition (26). The joint (27) is formed so as to be in airtight contact with each other when the operating member (20) is pushed down, and the communication hole (J) is formed on the outside of the first engaging row (27). Further, by arranging the outside air introduction holes (I) inside the second engaging strip (36), the first engaging strip (27) and the second engaging strip (36) are in contact with each other. The foam discharger according to claim 1 or 2, wherein a blocking means (V) for blocking communication from the communication hole (J) to the outside air introduction hole (I) is provided. The foam ejector according to any one of claims 1 to 3, wherein the hole tube portion (j) is erected from the hole edge of the communication hole (J).
The foam discharge according to any one of claims 1 to 4, wherein an outside air introduction valve body is attached to the outside air introduction hole (I) to form a first air check valve body (VA1). vessel.

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