JP7014667B2 - 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 controlling the introduction of outside air without attaching an outside air introduction valve body to the outside air introduction hole of the air cylinder.

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. The piston 22 and the air piston 32 are fitted into the air cylinder 14a, respectively, and the air pumped from the air cylinder 14a and the liquid pumped from the liquid cylinder 14b are pumped by the lowering of the operating member 20. In a foam discharger provided so as to be mixed and discharged from the discharge head 37 as bubbles through the foaming unit 30.
The air piston 32 includes a partition wall 34 that vertically divides the space between the outer surface of the tubular body 21 of the operating member 20 and the inner surface of the air cylinder 14a.
An outside air introduction hole I is opened in the inner peripheral portion 34a of the partition wall 34 so that the outside air introduction hole I can communicate with the outside air introduction hole I from the outside through the air introduction path A formed along the inner surface of the mounting member 2.
An outward flange-shaped wall portion 26 facing the upper surface of the partition wall 34 is projected from the outer peripheral surface of the tubular body 21 so as to be located above the elevating range of the air piston 32.
An annular second engaging strip 36 around the partition wall 34 so as to surround the tubular body 21 and a first engaging strip 27 around the lower surface of the outward flange-shaped wall portion 26. The shutoff means V is provided so as to be in close contact with each other when the actuating member 20 is pushed down and to cut off the communication from the air introduction path A to the outside air introduction hole I.
The partition wall 34 has an outer peripheral portion 34c lower than the inner peripheral portion 34a that opens the outside air introduction hole I and the intermediate portion 34b around which the second engaging strip 36 is provided.
The outward flange-shaped wall portion 26 extends outward from the intermediate portion 34b of the partition wall 34, and the surrounding cylinder portion 28 surrounding the blocking means V hangs down from the outer peripheral end of the outward flange-shaped wall portion 26. I did .

As shown in FIG. 1, this means provides an outside air introduction hole I in the inner peripheral portion 34a of the partition wall 34 of the air piston 32, and also has an outward flange-shaped wall portion facing the partition wall 34 from the cylindrical body 21 of the operating member 20. 26 is projected outward. 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 in the upright state of the foam discharge container does not directly enter the outside air introduction hole, but once collects in the lower portion (outer peripheral portion 34c) of the partition wall 34. There is a possibility that the 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 outward flange-shaped wall portion 26, the risk of water or the like entering the outside air introduction hole I can be reduced.
Further, in this means, instead of arranging the outside air introduction valve body in the outside air introduction hole I, the first engaging strip 27 provided around the outward flange-shaped wall portion 26 and the second engagement line provided around the partition wall 34. A blocking means V is provided so as to block the communication from the air introduction path A to the outside air introduction hole I by contacting the joint 36 with each other. Thereby, the inflow of the outside air can be controlled without providing the outside air introduction valve body.
Further, in this means, as shown in FIG. 2, the partition wall 34 is compared with the inner peripheral portion 34a that opens the outside air introduction hole I and the intermediate portion 34b around which the second engaging strip 36 is provided. In the configuration in which the outer peripheral portion 34c is provided low, the outward flange-shaped wall portion 26 extends outward from the intermediate portion 34b of the partition wall 34, and the surrounding cylinder portion is provided from the outer peripheral end of the outward flange-shaped wall portion 26. 28 is hanging down. This makes it more difficult for water or the like that has entered from the air introduction path A to reach the outside air introduction hole I.

The "engagement strip" as used herein is a portion extending in the circumferential direction on the facing surface of the outward flange-shaped wall portion and the partition wall, which can abut on each other and block communication from the outside to the inside. It shall be said. 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 "air introduction path formed along the inner surface of the mounting member" is an air introduction path formed between the facing surfaces of the mounting member and the operating member, or the facing of the mounting member and the container body and the cylinder member. It may be any of the air introduction paths formed between the surfaces. 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 second means has the first means, and one of the first engaging strip 27 and the second engaging strip 36 is in the annular engaging recess D, and the first engaging strip 27 and the second means. The other side of the second engaging strip 36 is formed in the annular engaging convex portion P that fits into the engaging concave groove D when the operating member 20 is lowered, and is inserted into the engaging concave groove D. In this state, the engaging convex portion P is provided so as to engage with one or both of the inner peripheral surface d2 and the outer peripheral surface d1 of the engaging concave groove D.

In this means, as shown in FIG. 1, one of the first engaging strip 27 and the second engaging strip 36 is in the annular engaging groove D, and the first engaging strip 27 and the second engaging strip are engaged. The other side of the strip 36 is formed in the annular engaging convex portion P that fits into the engaging concave groove D when the operating member 20 is lowered. Since the engaging convex portion P meshes with both the inner peripheral surface d2 and the outer peripheral surface d1 of the engaging concave groove D in a state of being inserted into the engaging concave groove D, the air introduction path A to the outside air introduction hole I Communication can be cut off more reliably.

According to the invention according to the first means, it is positioned above the elevating range of the air piston 32 from the outer peripheral surface of the tubular body 21 of the operating member 20 and faces outward facing the upper surface of the partition wall 34 of the air piston 32. Since the flange-shaped wall portion 26 is projected, the inflow of water or foreign matter from the outside air introduction hole I opened in the inner peripheral portion of the partition wall of the air piston 32 can be restricted, and the tubular body is formed in the partition wall 34. When the annular second engaging strip 36 around the 21 and the first engaging strip 27 around the lower surface of the outward flange-shaped wall portion 26 push down the actuating member 20. Since the blocking means V is provided so as to airtightly contact each other and block the communication from the air introduction path A to the outside air introduction hole I, the outside air can be introduced without installing the outside air introduction valve body in the outside air introduction hole I. The inflow can be controlled.
Further, according to the invention according to the first means, the partition wall 34 is compared with the inner peripheral portion 34a that opens the outside air introduction hole I and the intermediate portion 34b around which the second engaging strip 36 is provided. The outer peripheral portion 34c is provided low, the outward flange-shaped wall portion 26 extends outward from the intermediate portion 34b of the partition wall 34, and the blocking means V extends from the outer peripheral end of the outward flange-shaped wall portion 26. Since the surrounding cylinder portion 28 is hung down, it is difficult for water to reach the engaging portion between the first engaging strip 27 and the second engaging strip 36 in the depressed state of the operating member 20, and the outside air introduction hole. The effect of preventing inundation from I can be further ensured.
According to the invention according to the second means, one of the first engaging strip 27 and the second engaging strip 36 is in the annular engaging groove D, and the first engaging strip 27 and the second engaging strip 36. The other side of the strip 36 is formed in the annular engaging convex portion P that is fitted into the engaging concave groove D when the operating member 20 is lowered, and is engaged in the engaging concave groove D in the inserted state. Since the engaging convex portion P is provided so as to engage with one or both of the inner peripheral surface d2 and the outer peripheral surface d1 of the concave groove D, air is provided over the entire circumference of the first engaging strip 27 and the second engaging strip 36. Communication from the introduction path A to the outside air introduction hole I can be more reliably cut off.

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 ejector 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. 1, 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.
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 outward flange-shaped wall portion 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 outward flange-shaped wall portion 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 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 partition wall 34 in the illustrated example is configured to be gradually 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 cylindrical valve portion 33 and the cylinder 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 outward flange-shaped wall portion 26 projects outward from the lower portion 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 outward flange-shaped 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. The outward flange-shaped wall portion 26 shall be installed so as to be located above the elevating range of the air piston 32.
The outward flange-shaped wall portion 26 extends outward from the inner peripheral portion 34a and the intermediate portion 34b of the partition wall 34, and the surrounding cylinder portion 28 is vertically provided from the outer periphery of the outward flange-shaped wall portion.
A second engaging strip 36 is attached to the intermediate portion 34b of the partition wall 34, and a first engaging strip 27 is provided at a portion of the outward flange-shaped wall portion 26 facing the intermediate portion due to the lowering of the actuating member 20. It is provided so as to be in airtight contact with the.
In the present embodiment, the first engaging strip 27 is formed in the annular engaging convex portion P hanging from the outward flange-shaped wall portion 26, and the second engaging strip 36 is formed in the annular engaging concave groove D. There is. However, the first engaging strip 27 is formed as an engaging concave groove recessed in the lower surface of the outward flange-shaped wall portion 26, and the second engaging strip 36 is formed in the engaging convex portion protruding upward from the upper surface of the partition wall 34. It doesn't matter.
In a preferred illustrated example, the stepped wall portion S between the intermediate portion 34b and the outer peripheral portion 34c of the partition wall 34 is extended upward, and the side surface of the extension portion s is designated as 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 outward flange-shaped wall portion 26 and the second engaging strip 36 is integrally molded as a part of the partition wall 34, the outside air introduction valve body is attached as a separate part. Compared with the case, the number of parts can be reduced.

The surrounding cylinder portion 28 has a function of surrounding the blocking means V, and as shown in FIG. 2, extends downward from the extension portion s of the step wall portion S. By providing the siege cylinder portion 28, it is difficult for water to enter the intermediate portion 34b side of the partition wall 34 from the side, but on the other hand, air bypasses the lower side of the siege cylinder portion 28 as indicated by the dotted line in FIG. It is easy to flow into the outside air introduction hole I, and the infiltration of water can be suppressed without hindering the introduction of the outside air.

In the above configuration, in the state shown in FIG. 1, the first engaging strip 27 and the second engaging strip 36 are separated from each other, and the air introduction path A and the outside air introduction hole I communicate with each other. In this state, even if water enters the upper side of the partition wall 34 through the air introduction path A, the outward flange-shaped wall portion 26 covers the upper part of the inner peripheral portion 34a and the intermediate portion 34b of the partition wall 34. It is difficult for water to enter the outside air introduction hole I.
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 is separated. Then, due to the negative pressure in the air chamber K, the outside air is sucked from the air introduction path A into the outside air introduction hole I through the partition wall 34 and the outward flange-shaped wall portion 26.

FIG. 7 shows a modified example of the present embodiment. 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 (in the illustrated 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 partition wall 34 of the air piston 32 described above, the outside air introduction hole I is opened. Liquid easily enters the air chamber through the outside air introduction hole.
In order to solve this problem, in the present invention, the outward flange-shaped wall portion 26 is projected outward from the lower portion of the vertical cylinder portion 25 of the stem to the outside from the intermediate portion 34b of the partition wall 34, whereby the actuating member Flowing water can be guided from the gap between the outer surface and the guide cylinder portion to the outer peripheral portion 34c of the partition wall 34 via the upper surface of the outward flange-shaped top wall portion 26. Since the outer peripheral portion 34c is formed lower than the inner peripheral portion 34a and the intermediate portion 34b of the 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, from 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 26 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 outer peripheral portion 34c of the partition wall 34.

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 ... Actuating 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 ... Outward flange shape Wall part 27 ... First engaging strip 28 ... Surrounding cylinder part 29 ... Holding cylinder 29a ... Lower half cylinder part 29b ... Upper half cylinder part 30 ... Foaming part 32 ... Air piston 33 ... Cylindrical valve part 34 ... Partition 34a ... Inner 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 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 ... Blocking means VA ... Check valve for air
VL1 ... Check valve for 1st liquid VL2 ... Check valve for 2nd liquid VL3 ... Check valve for 3rd liquid

Claims (2)

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 in the liquid cylinder (14b), and the air piston (32) is fitted in the air cylinder (14a), and the operation is performed. By lowering the member (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 (30) is used as bubbles through the foaming portion (30). In the foam ejector provided so that it can be ejected from 37),
The air piston (32) includes a partition wall (34) that vertically divides the space between the outer surface of the tubular body (21) of the actuating member (20) and the inner surface of the air cylinder (14a).
The outside air introduction hole (I) is opened in the inner peripheral portion (34a) of the partition wall (34), and the outside air is introduced from the outside through the air introduction path (A) formed along the inner surface of the mounting member (2). It enables communication to the introduction hole (I) and also enables communication.
An outward flange-shaped wall portion (26) facing the upper surface of the partition wall (34) is projected from the outer peripheral surface of the tubular body (21) so as to be located above the elevating range of the air piston (32). ,
An annular second engaging strip (36) is provided around the partition wall (34) so as to surround the tubular body (21), and is provided around the lower surface of the outward flange-shaped wall portion (26). The first engaging strip (27) and the actuating member (20) are in close contact with each other when the actuating member (20) is pushed down, and the blocking means for blocking the communication from the air introduction path (A) to the outside air introduction hole (I). (V) is provided ,
The partition wall (34) has an outer peripheral portion as compared with an inner peripheral portion (34a) that opens the outside air introduction hole (I) and an intermediate portion (34b) around which the second engaging strip (36) is provided. (34c) is set low,
The outward flange-shaped wall portion (26) extends outward from the intermediate portion (34b) of the partition wall (34), and the blocking means ( A foam ejector, characterized in that the surrounding cylinder portion (28) surrounding V) is hung down . One of the first engaging strip (27) and the second engaging strip (36) is in the annular engaging recess (D), and the first engaging strip (27) and the second engaging strip (36). The other of) is formed in the annular engaging convex portion (P) that is fitted into the engaging concave groove (D) when the operating member (20) is lowered, and is formed in the engaging concave groove (D). It is characterized in that the engaging convex portion (P) is provided so as to mesh with one or both of the inner peripheral surface (d2) and the outer peripheral surface (d1) of the engaging concave groove (D) in the inserted state. The foam ejector according to claim 1.

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