JP3215641B2 - Foam squirt pump container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam ejection pump container which mixes foaming liquids such as detergents and shampoos with air, foams them, and ejects them.

[0002]

2. Description of the Related Art A large number of foam pump pump containers of this type have been proposed and are well known, and as a relatively recent one, Japanese Patent Application No. 2-515082 (International Publication No. WO 92/08657).
There is.

In this conventional example, a foam ejection pump attached to an opening of a container body containing a liquid is a double type of a liquid cylinder and an air cylinder, and a liquid piston and an air piston are integrated with these cylinders. 2 channels and air channels
A mixing chamber for generating bubbles by combining these flow paths and rising upward in a double tubular shape is formed, and the mixing chamber is connected to a jetting nozzle at the top through a porous sheet-like body for uniformizing the foam, and is connected to the liquid. The system is provided with a suction valve and a discharge valve, the air system is provided with an exhaust valve and an intake valve, and the liquid cylinder is equipped with a return spring that pushes up the movable part. The liquid and air pistons are pressed down to pressurize the liquid and air, and these are introduced into the mixing chamber by opening the discharge valve and exhaust valve to form a foam, and then the foam is made uniform through the porous sheet. And ejects it from the ejection nozzle to the outside.

When the depression is stopped after the foam is ejected, the liquid piston and the air piston return to the upper original position by the return spring, and the liquid cylinder and the air cylinder return to a negative pressure by this return, so that the suction valve is opened. Then, the liquid is sucked from the container body into the liquid cylinder, and the intake valve is opened to introduce outside air into the air cylinder to prepare for the next ejection.

[0005]

In the above-mentioned prior art, when bubbles are ejected, there is a possibility that the remaining bubbles adhering to the inside of the nozzle tube are dried and solidified to cause clogging. It was necessary to take care that the nozzle tube was not closed with a stopper plug or the like so that the residual foam did not solidify, and maintenance was required.

[0006] In addition, bubbles are produced by mixing gas and liquid in a mixing chamber. However, since the liquid flow fed from the liquid cylinder is a so-called rod-like flow of one flow, there is a portion where sufficient mixing with pressurized air is not performed. There was room for improvement in terms of foam quality and foaming efficiency.

According to the present invention, when the blowing of bubbles is completed, the remaining bubbles in the nozzle tube are automatically back-flowed to prevent clogging of the nozzle tube, and the gas and liquid are reduced to several small flows in the introduction portion of the mixing chamber. The object of the present invention is to obtain a reliable bubble jet pump container which is divided so that gas-liquid mixing and thus foaming can be performed effectively.

[0008]

A foam ejection pump container according to the present invention comprises a container body 1 and a screw cap 2 screwed into the mouth and neck 12 of the container body 1 by opening a hole 11 in the center of the top wall. The upper half is formed into a large-diameter air cylinder 13 and the lower shaft half is formed into a small-diameter liquid cylinder 15 in which a bottom opening is connected to a suction pipe 14 that hangs down into the container body 1. The cylinder member 3 vertically extended from the upper part of the container body 2 to the upper part of the container body 1 and the rod body 16 which rises to the middle of the inner axis of the cylinder 15 at the bottom opening part of the liquid cylinder 15 and stands up and down by a small distance. The suction valve 4 is disposed so as to be capable of contacting and separating from the inner surface of the bottom of the liquid cylinder 15 and has a valve body 17 at the lower end surface. The inner surface of the lower end portion slides against the outer surface of the rod 16 and a discharge hole 18 is opened at the lower portion. Rises from the liquid cylinder 15 to the outside via the air core 13 The drainage pipe 5 whose volume is reduced by increasing the insertion amount of the rod body 16 at the time of descent, and a cylindrical, which is in sliding contact with the outer surface of the drainage pipe 5 and the inner surface of the liquid cylinder 15 to slide the discharge hole 18 A followable liquid piston 6 also serving as a discharge valve to be closed, an air piston 7 which is mounted inside a donut-shaped air chamber of the air cylinder 13 so as to be vertically slidable and partially provided with an intake valve 19, The outer periphery of the drainage pipe 5 rises from the peripheral edge, and the upper part is formed in a mixing chamber 21 in which a foam uniforming net 20 is stretched at least at an outlet opening. An exhaust pipe 8 which is formed to hang down on the pipe 22 to divide the introduced gas and liquid into a fine stream, a press-down head 9 which projects a nozzle pipe 23 to one side and is connected to the upper part of the exhaust pipe 8 and is connected to the liquid cylinder 15. Returning to push up and urge the movable part upward through the drain pipe 5 It comprises a spring 10.

FIG. 1 shows a normal state in which the movable part is pushed up to the upper limit.
Closes the discharge hole 18 and closes the discharge valve, and the air cylinder 13 is filled with air and the liquid cylinder 15 is filled with liquid.

When the bubbles are to be ejected, the integral part of the air piston 7 and the exhaust pipe 8, the drainage pipe 5, and the movable part of the liquid piston 6 are pushed down through the push-down head 9 against the return spring 10.

Then, the air in the air cylinder 13 is pressurized, and the intake valve 19 closes, so that the pressurized air is pumped from the exhaust pipe 8 to the inlet of the mixing chamber 21, while the liquid system is initially liquid First, the drainage pipe 5 is first pushed down into the same body while the piston 6 is kept as it is, so that a gap is formed between the lower end of the drainage pipe 5 and the liquid piston 6, and thus the gap and the discharge in the liquid cylinder 15 are formed. The hole 18 communicates with the inside of the drain pipe 5.
That is, the discharge valve opens, and in this open state, the liquid piston 6
Is pressed down by the drainage pipe 5 and descends following it, thereby pressurizing the liquid in the liquid cylinder 15, and this pressurized liquid is sent from the drainage pipe 5 to the introduction portion of the mixing chamber 21.

Since windows 22 are provided at the introduction portion of the mixing chamber 21 in the circumferential direction, the liquid flow and the air flow are divided into several flows like a shower and introduced into the mixing chamber 21. The liquid is mixed easily and sufficiently to form bubbles, and thereafter, the liquid is homogenized by the foam uniforming net 20 and is ejected from the nozzle tube 23 to the outside.

When the bubble ejection ends and the pressing is stopped, the movable portion is pushed up by the return spring 10 and returns to the original position.
With this return, the air chamber in the air cylinder 13 becomes negative pressure,
Accordingly, the intake valve 19 opens, and the outside air is drawn into the air chamber from the intake valve 19 through the gap between the exhaust pipe 8 and the opening 11 of the screw cap 2.

On the other hand, in the liquid cylinder 15, the lower end of the drain pipe 5 comes into contact with the lower surface of the liquid piston 6 with a delay of the gap, that is, the discharge valve is closed, and thereafter the liquid piston 6 is pushed up to the same body, so that the pressure becomes negative. Further, the suction valve 4 is pulled up via the rod 16 when the drainage pipe 5 rises, and is opened, so that the liquid is sucked up from the inside of the container body 1 through the suction pipe 14 to prepare for the next ejection.

In this case, the rising drain pipe 5 is connected to the suction valve 4.
Since the insertion amount of the rod body 16 is reduced and the volume is increased by that amount, the pressure is reduced, so that the residual bubbles in the nozzle tube 23 are sucked. That is, since no bubbles remain in the nozzle tube 23, clogging due to solidification of the bubbles does not occur even when the nozzle tube 23 is left.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. A foam ejection pump container according to the present invention comprises a container 1, a screw cap 2, a cylinder member 3, a suction valve 4, a drain pipe 5, It comprises the main members of a liquid piston 6, an air piston 7, an exhaust pipe 8, a pressing head 9, and a return spring 10.

The container body 1 may have any desired shape, but the mouth and neck portion 12 is formed with a large diameter.

The screw cap 2 has a mounting peripheral wall 24 provided with an inward flange at the upper end and screwed to the mouth and neck portion 12 and a top plate 26 having a screw tube 25 suspended from the central opening 11 as a separate member. Formed and combined.

The cylinder member 3 is a small-diameter liquid cylinder in which an upper half is connected to a large-diameter air cylinder 13, and a lower half of the shaft is connected to a suction pipe 14 that extends downward from the bottom of the container body 1. The container has a so-called double-cylinder shape formed at 15 and has an outward flange at the upper end thereof hung on the neck of the container 1 and the outward flange is pressed down and fixed by an inward flange at the upper end of the mounting peripheral wall 24 to form a container. It is suspended from the upper part of the body 1.

An auxiliary peripheral wall 27 is erected from the upper surface of the outward flange at the top, and the top plate 26 is engaged and fixed to the peripheral wall 27.

Reference numeral 28 denotes a cylindrical elastic valve provided with a packing at the top, which is opened when the liquid is sucked up by the liquid cylinder 15 and the inside of the container 1 becomes negative pressure after the bubble is jetted out. The outside air is sucked into the container body 1 to prevent the container body 1 from becoming negative pressure.

The suction valve 4 has a lower half as a cylindrical body, a lower end surface of the cylindrical body as a valve body 17, and an upper half as a liquid cylinder 15. The valve body 17 is disposed so as to be able to move up and down at the bottom opening inside the liquid cylinder 15, and the valve body 17 comes in contact with and separates from the valve seat which is the inner wall surface of the bottom opening to open and close. The suction valve 4 has a protrusion 30 protruding from the lower outer surface, and the protrusion 30 is provided so as to be engaged with an inward stopper 31 from the inner surface of the liquid cylinder 15 and to move up and down a small distance.

The drain pipe 5 is formed by integrally fitting the upper member and the lower member, and the lower end portion of the drain pipe 5 passes through the core of the air cylinder 13 as a sliding contact portion 32 that slides on the inner surface of the liquid cylinder 15. It is set up outside. Partial cross section of the sliding contact portion 32 is H
In the shape of the shape, the outer peripheral edge is notched with a liquid passage groove in the circumferential direction, and the upper and lower sides are communicated with each other, the discharge holes 18 are opened on both sides immediately above the sliding contact portion 32, and the outer surface of the middle abdomen is downward. The engagement cylinder 33 having a large diameter that depends on the engagement cylinder 33 is branched. Sliding contact part 32
Is provided with an elastic peripheral wall on its inner periphery, and this elastic peripheral wall is slidably pressed against the outer surface of the rod body 16.

The liquid piston 6 has a cylindrical shape, and has an H-shaped cross section with its inner and outer peripheral edges being elastic peripheral walls. The liquid piston 6 slides up and down at the discharge hole 18 on the outer surface of the drain pipe 5 and the inner surface of the liquid cylinder 15. It is slidably disposed so as to always close the discharge hole 18 and also serves as a discharge valve.

The liquid piston 6 is free and moves up and down following the drain pipe 5 with a delay of one tempo. That is, FIG.
Is always in a closed state, but the drainage pipe 5
First, the liquid piston 6 does not descend, and therefore enters the engaging cylinder 33 of the drain pipe 5, whereby a gap is formed between the liquid piston 6 and the sliding contact portion 32 at the lower end of the drain pipe 5. As a result, the liquid cylinder 15 communicates with the drain pipe 5 through the discharge hole 18, that is, the discharge valve opens, and thereafter the liquid piston 6 is pushed down by the engagement cylinder 33.

The air piston 7 is connected to the air cylinder 13
A doughnut-shaped one conforming to the air chamber is provided, and an intake valve 19 formed by a ball valve is provided in a part thereof, and the elastic peripheral wall of the outer peripheral edge is slidably contacted with the inner wall of the air cylinder 13 so as to be vertically movable.

The exhaust pipe 8 rises from the inner peripheral edge of the air piston 7 to the outer periphery of the drain pipe 5 to the upper part of the drain pipe 5, and forms an upper part that has passed through the drain pipe 5 in the mixing chamber 21. As shown in the enlarged view of FIG. 2, the introduction portion of the mixing chamber 21 is provided with an inverted pot-shaped hanging portion from the inner peripheral edge of the inward flange 34, and is provided on the sloped peripheral wall of the hanging portion in a circumferential direction. An introduction window 22 is provided on all sides, and the hanging part is inserted and locked with a part left in the upper end opening of the drainage pipe 5, and an air introduction path 35 is provided between the lower end and the upper end of the drainage pipe 5. . Therefore, both the air flow and the liquid flow are divided into a shower shape by the introduction window 22 and introduced into the mixing chamber 21.

The mixing chamber 21 is formed by fitting a separate cylindrical member, and the foam uniforming net 20 is stretched at both the inlet and the outlet. The inner surface of the exhaust pipe 8 has a downward step, and the upward step of the drainage pipe 5 is engaged with the downward step, so that the drain pipe 5 can move up and down substantially integrally.

The press-down head 9 projects the nozzle tube 23 from one side, and a connecting cylinder 36 on the lower surface is externally fitted and fixed to the upper portion of the exhaust pipe 8 to communicate therewith. In addition, a screw 37 is cut on the outer surface of the coupling cylinder 36, and during distribution, the movable part is pushed down as shown in FIG.
The screw 37 is screwed into the screw cylinder 25 to prevent the movable part from being inadvertently pushed down, so that the bubble is not ejected. At this time, the outer peripheral edge of the sliding contact portion 32 at the lower end of the drainage pipe 5 is pressed against the inner surface of the small diameter portion below the liquid cylinder 15 to close the bottom opening of the cylinder 15.

The return spring 10 has a coil shape, is inserted between the stopper 31 and the sliding contact portion 32 at the lower end of the drainage pipe 5, and is housed in the liquid cylinder 15. Pushing up.

According to this embodiment, the suction valve 4 provided at the bottom opening in the liquid cylinder 15 is
A rod 16 that rises at the shaft core and enters the lower part of the drainage pipe 5
When the movable part is pushed down when the bubbles are ejected, the amount of the rod 16 inserted into the descending drain pipe 5 is increased to reduce the volume of the drain pipe 5 and rises when returning after the foam ejection. Bar body 16 of drain pipe 5
Since the amount of insertion is reduced to increase the volume by that amount, thereby reducing the pressure, the remaining bubbles of the nozzle tube 23 are sucked into the inside, so that the remaining bubbles can be prevented from adhering to the nozzle tube 23, Therefore, it is possible to prevent solidification of the residual bubbles to cause clogging.

Further, the introduction section of the mixing chamber 21 is formed in several introduction windows 22 in the circumferential direction, and the introduced air flow and liquid flow are divided into small flows in the form of a shower. It becomes easy and sufficient, and it is possible to increase the foam quality and foaming efficiency.

[0033]

As described above, in the foam ejection pump container according to the present invention, the suction valve 4 is provided with the rod 16 which rises up the axis of the liquid cylinder 15 and whose leading end enters the lower part of the drainage pipe 5 to push the foam at the time of foam ejection. Lower the drain pipe 5 that goes down by lowering and rises when returning.
The internal volume is increased or decreased by increasing or decreasing the insertion amount of the nozzle 16, and at the time of return, a negative pressure is applied to suck the residual bubbles in the jet nozzle tube 23 into the inside. This eliminates the need to attach a stopper or the like every time bubbles are blown out, which makes handling easier.

Further, since the air flow and the liquid flow are divided into small streams and introduced into the mixing chamber 21 by passing through several introduction windows 22, the gas-liquid mixing becomes easy and sufficient, and the foam quality,
Foaming efficiency is increased, and reliability is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment.

FIG. 2 is an enlarged view of a main part of the embodiment.

FIG. 3 is a vertical cross-sectional view of the embodiment at a distribution stage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container body 2 Screw cap 3 Cylinder member 4 Suction valve 5 Drain pipe 6 Liquid piston 7 Air piston 8 Exhaust pipe 9 Push-down head 10 Return spring 16 Rod body 22 Introducing window

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-293568 (JP, A) JP-A-2-1269 (JP, U) JP-A-3-15366 (JP, U) JP-A-3,366 7963 (JP, U) WO 92/8657 (WO, A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 47/06 B05B 11/00-11/06 B65D 47/34

Claims (1)

(57) [Claims] 1. A container body 1, a screw cap 2 screwed to the container body 1 neck 12 by opening a hole 11 in a central part of a top wall, and a large-diameter air cylinder 13 in an upper half part. The lower half of the shaft core is formed in a small-diameter liquid cylinder 15 in which a suction pipe 14 hanging down into the container body 1 is communicatively connected to the bottom opening.
A cylinder member 3 suspended from the upper part in the container body 1,
At the bottom opening of the liquid cylinder 15, this cylinder 15
A suction valve 4 having a valve body 17 having a lower end face 17 which is vertically movable up and down by a short distance by raising a rod body 16 which raises the inner shaft core partway; The inner surface of the rod slides on the outer surface of the rod 16 and a discharge hole 18 is formed in the lower part to rise upward from the liquid cylinder 15 via the air core 13 to the outside.
A drain pipe 5 whose volume is reduced by increasing the amount of insertion of the drain pipe 16; and a discharge valve 5 which is cylindrical and serves as a discharge valve that slides on the outer surface of the drain pipe 5 and the inner surface of the liquid cylinder 15 to close the discharge hole 18. A liquid piston 6, an air piston 7, which is mounted inside a donut-shaped air chamber of the air cylinder 13 so as to be vertically slidable and partially provided with an intake valve 19. (5) The outer periphery is raised, and the upper part is formed in a mixing chamber 21 in which a foam uniforming net 20 is stretched at least at an outlet opening.
Exhaust pipe 8 hanging down from 22 to split the introduced gas and liquid into a small stream
And a push-down head 9 projecting from one side to the nozzle pipe 23 and communicating with the upper part of the exhaust pipe 8, and a push-up head which is housed in the liquid cylinder 15 and pushes up the movable part upward through the drain pipe 5. And a return spring 10 for discharging the foam.