JPH0657843U - Foam jet pump container - Google Patents

Abstract

(57) [Summary] [Purpose] The opening and closing of the air valve is immediate and reliable,
Also, a highly reliable foam jet pump container capable of reliably preventing liquid leakage even if the container falls or the like is obtained. [Structure] A liquid system having a liquid cylinder 13 and a liquid passage pipe 5 with a liquid piston 15 and an air system having an air cylinder 10, an air piston 6 and an air passage pipe 7 are provided together to form a mouth portion of the container body 1. The liquid jet and the air flow are mixed in the mixing chamber 24 by the foam jet pump attached to the bubble to make the foam.
In the foam jet pump container which makes the air flow uniform and jets it from the nozzle tube 25 of the pressing head 8 at the top, the air piston 6 is pushed down and is free from being delayed by one tempo from the moving part at the time of return, and is elastic from the inner peripheral edge of this air piston 6. The reverse skirt-shaped air valve 20 is installed upright, and this air valve 20 is connected to the air passage pipe 7.
The air intake hole 22 is inscribed in the opened lower part and the opening / closing of the air valve 20 is pushed down to operate by a unique mechanical operation of the return, and the liquid cylinder 13 has a shaft part with an upper part having a thick shaft. The body 4 is installed vertically, and the inner surface of the lower portion of the liquid passage pipe 5 is always joined to the thick portion of the upper portion of the rod body 4 in a liquid-tight manner to seal the inside of the liquid cylinder 13.
Structure that prevents liquid leakage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a foam jet pump container that mixes foamable liquid such as detergent or shampoo with air to foam and eject the foamed liquid.

[0002]

[Prior art]

 Many seed bubble ejection pump containers have been proposed and are well known, and a relatively recent one is Japanese Patent Application No. 2-515082 (International Publication No. WO 92/08657).

In this conventional example, a bubble jet pump attached to the mouth of a container containing a liquid is a double type of a liquid cylinder and an air cylinder, and a liquid piston and an air piston in which these cylinders are integrated. From the above, the liquid flow path and the air flow path are raised upward in a double-tube shape to join the flow paths to form a mixing chamber for generating bubbles, and the mixing chamber is formed into a porous sheet-like body for uniformizing bubbles. It is connected to the jet nozzle at the top via the inlet and outlet valves in the liquid system, the exhaust valve and the intake valve in the air system, and the return spring for pushing up the moving part is installed in the liquid cylinder. During ejection, the liquid piston and air piston are pushed down against the return spring through the ejection nozzle to pressurize the liquid and air, and these are introduced into the mixing chamber by the opening of the discharge valve and exhaust valve to form a foam. After this, pass through the porous sheet to make the bubbles uniform. It is to be ejected from the ejection nozzle to the outside.

When the pushing down is stopped after the bubbles are ejected, the liquid piston and the air piston are returned to their original positions by the return spring, and the liquid cylinder and the air cylinder are negatively pressured by this return, so that the suction valve Is opened and liquid is sucked up into the liquid cylinder from the container body, and the intake valve is opened and outside air is introduced into the air cylinder to prepare for the next jet.

[0005]

[Problems to be solved by the device]

 In the above-mentioned conventional example, a ball-shaped valve is used as an air valve of the air system that rises and falls when air reaches the required pressure and opens and closes. There is a lack of responsiveness and certainty due to the delay in the operation.

Further, even in a liquid system, a ball valve is used as a discharge valve. Therefore, if the container is inadvertently laid sideways, the ball discharge valve rolls and opens, so that the liquid leaks to the outside. There is a risk.

The present invention is to obtain a highly reliable bubble jet pump container in which the opening and closing of the air valve is prompt and reliable, and liquid leakage can be reliably prevented even if the container falls.

[0008]

[Means for Solving the Problems]

 The foam jet pump container of the present invention comprises a container body 1, a screw cap 2 which is opened at the central portion of the top wall and is screwed into the neck portion 9 of the container body 1, and a large-diameter air cylinder with a closed bottom portion. A double cylinder having a small diameter liquid cylinder 13 in which a suction valve 11 is arranged at the bottom opening and a suction pipe 12 that hangs downward is connected to the shaft core of 10 to form a double type. A cylinder member 3 vertically provided in an upper portion of the container body 1; and a rod body 4 vertically fixed to an axial core portion of the liquid cylinder 13 by forming a slanted outer lower engaging slant surface 14 with a thick upper portion. A skirt-shaped elastic liquid piston 15 whose lower end is slidably contacted with the inner surface of the liquid cylinder 13 is formed. Stand up and install the discharge valve 17 in the upper part. An external pipe 18 that hangs down from the liquid pipe 5 is branched from the liquid pipe 5 and is urged upward by a return spring 19 via the external pipe 18, the air cylinder 10 and the outside of the liquid pipe 5 A donut-shaped air chamber between the pipes 18 is formed of a follower type that is slidably arranged with an inner skirt-shaped upper part formed with a reverse skirt-shaped elastic air valve 20 and a ventilation gap provided between the pipe 18 and the outer pipe 18. An air passage 21 is formed between the air piston 6 and the outer surface of the liquid passage pipe 5 by forming an air passage 21 between the air piston 6 and the outer surface of the liquid passage pipe 5, and the air valve 20 is circumscribed. The air intake pipe 22 is formed in the lower expanded portion located at the upper part of the liquid passage pipe 5, and the upper portion above the liquid passage pipe 5 is formed in the mixing chamber 24 with the bubble homogenizing net 23. The nozzle tube 25 is configured to project and the press-down head 8 which is fitted in communication with the air passage tube 7.

[0009]

[Action]

 As described above, the movable parts of the liquid passage pipe 5 with the liquid piston 15, the air piston 6, the air passage pipe 7, and the pressing head 8 are normally pushed up by the return spring 19 to the upper limit position as shown in FIG. At this position, the intake hole 22 is open from the air valve 20, and there is a proper gap between the air piston 6 and the lower end of the air passage pipe 7 above it, and the air cylinder 10 The air chamber is filled with air and the liquid cylinder 13 is filled with the sucked liquid.

Further, at this normal position, the engaging slope 16 on the lower inner part of the liquid passage pipe 5 is joined to the engaging slope 14 on the lower outer part of the upper part of the rod body 4 to make the liquid cylinder 13 liquid-tight. Since the container is closed, even if the container is overturned or the ball-shaped discharge valve 17 rolls to open the valve, the liquid does not flow out to the outside.

Here, when ejecting bubbles, as shown in FIG. 2, the movable portion may be pushed downward against the return spring 19 via the pushing head 8.

Then, the liquid piston 15 is pushed into the same body to pressurize the liquid in the liquid cylinder 13, and at the same time, the air passage pipe 7 descends ahead of the air piston 6 which is free from the gap in the same body, so that the intake hole 22 is filled with air. The valve 20 is closed, and after the valve is closed, the lower end of the air passage pipe 7 reaches the air piston 6, and then the air piston 6 is pushed down by the air passage pipe 7 to pressurize the air in the air chamber. In other words, the air valve 20 is pressed down to operate immediately without any time delay, and is reliable.

Therefore, the pressurized liquid in the liquid cylinder 13 passes through the liquid passage pipe 5 and the discharge valve 17 which is opened by pushing up to the mixing chamber 24, and the pressurized air in the air cylinder 10 is the inner peripheral edge of the air piston 6. It is introduced into the mixing chamber 24 through the air passage 21 from the gap between the outer pipe 18 and the outer pipe 18, and in the mixing chamber 24 gas-liquid mixture is formed into a foam, which is homogenized by the foam homogenizing net 23 and then from the nozzle pipe 25. Erupted to the outside.

When the bubble ejection ends and the pushing down is stopped, the movable portion is pushed up by the return spring 19 and returns to the original state as shown in FIG. As a result, the liquid cylinder 13 has a negative pressure, and the negative pressure causes the suction valve 11 to open and suck the liquid in the container body 1 through the suction pipe 12.

On the other hand, in the air cylinder 10, the air passage pipe 7 is moved upward in the same body, whereby the intake valve 22 is separated from the air valve 20 and the air valve is opened. Since the air cylinder 10 rises following the pipe 5, a negative pressure is generated in the air cylinder 10. Therefore, the air piston 10 passes through an intake hole 22 opened through a gap between the opening of the top plate of the screw cap 2 and the lower connecting pipe of the pressing head 8. The outside air is sucked into the air chamber of the air cylinder 10 through the gap between the inner peripheral edge 6 and the outer tube 18 and returns to the original state, and prepares for the next bubble ejection.

At the time of this return, since the liquid passage pipe 5 comes out of the rod body 4, its volume increases and a negative pressure is produced. By this negative pressure, the residual bubbles in the nozzle pipe 25 are sucked into the inside of the nozzle pipe 25. It is possible to prevent clogging due to the solidification of residual bubbles inside 25.

[0017]

【Example】

 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment will be described below. The foam jet pump container of the present invention comprises a container body 1, a screw cap 2, a cylinder member 3, a rod body 4, a liquid pipe 5, an air piston 6, and an air pipe. 7 and the pressing head 8 are the main members.

Although the container body 1 may have any suitable shape, the mouth / neck portion 9 has a large diameter.

The screw cap 2 has a mounting peripheral wall 26 and a top wall 27, which are screwed together with the mouth / neck portion 9, formed as separate members, and a screw cylinder 28 is hung from an opening portion at the center of the top wall 27. Further, the top of the air cylinder 10 of the cylinder member 3 is fitted and attached by the outer peripheral edge and the inner and outer peripheral walls 29, 30 which are hung from the inner side thereof in a double peripheral wall shape. The lower end of the inner peripheral wall 29 also serves to lock the air piston 6 and to define the upper limit position of the movable part.

The cylinder member 3 is of a double type in which a small diameter liquid cylinder 13 having an open bottom is erected from the bottom to the shaft core of a large-diameter air cylinder 10 having a reduced diameter at the bottom and a closed bottom. An outer flange 31 on the outer surface of the upper part of the air cylinder 10 is hung on the top of the mouth of the container body 1 and hung vertically inside the container body 1.

A ball-shaped suction valve 11 is provided inside the reduced-diameter bottom opening of the liquid cylinder 13, and a suction pipe 12 that hangs downward in the container body 1 is communicatively coupled to the coupling cylinder at the bottom. There is.

The lower part of the rod body 4 has a cylindrical shape, and through holes 32 are formed in the cylindrical portion in a circumferentially discrete manner, and a protruding edge is provided on the outer peripheral edge of the lower end of the cylindrical portion. This cylinder 13 shaft core is erected upward by fitting it in the inner surface of the lower part, and the upper part of the neck out of the liquid cylinder 13 is made into a thick cylindrical part with a large diameter in the middle. The outer surface of the lower half of the section is an engaging slanting surface 14 in the diagonally outer downward direction.

The liquid passage pipe 5 is formed with a skirt-shaped elastic liquid piston 15 whose lower end is in sliding contact with the inner peripheral surface of the cylinder 13, and the upper portion of the piston 15 is slightly squeezed inward, and this portion is described above. The engaging slope 16 that is liquid-tightly joined to the engaging slope 14 is formed on the obliquely inside engagement slope 16 and rises upward and outward, and a ball-shaped discharge valve 17 is provided on the upper part, and an outward flange is provided from the upper outer surface. The outer cylinder 18 is branched and hung so as to reach the outer circumference of the upper part of the liquid cylinder 13 through a double tube.

The lower end of the outer pipe 18 is expanded in diameter to provide a downward step, and a coil-shaped return spring 19 is interposed between the downward step and the bottom of the air cylinder 10 so that the return spring 19 always moves upward. It is being pushed up. An upward projecting edge 33 is provided in the circumferential direction so as to extend from the outer peripheral edge of the enlarged diameter portion of the lower step of the lower end. This upward projecting edge serves to push up the air piston 6 upward through the inner peripheral portion when returning.

The air piston 6 has a shape in which an elastic peripheral wall having an arcuate cross section is provided on the outer peripheral edge of a donut-shaped base plate, and an elastic air valve 20 having a reverse skirt shape is provided upright from the inner peripheral edge. It is internally slidable in a donut-shaped air between the inner peripheral surface of the cylinder wall of the linder 10 and the outer surface of the outer pipe 18 of the liquid passage pipe 5. A ventilation gap is provided between the inner peripheral edge and the outer surface of the outer pipe 18, the elastic peripheral wall of the outer peripheral edge is locked to the inner peripheral wall 29 for defining the upper limit position, and the lower surface of the inner peripheral wall is the upward protruding edge. Therefore, the air piston 6 defines the upper limit position of the movable part and is pulled up by the outer pipe 18 when returning.

The ventilation gap at the inner peripheral edge may be formed by an assembling means, or may be formed by providing a large number of grooves in the inner peripheral edge of the inner peripheral edge.

The air passage pipe 7 has a stepped shape corresponding to the outer shape of the liquid passage pipe 5, is fitted and fixed to the outer surface of the liquid passage pipe 5, and the upper portion of the upper portion of the liquid passage pipe 5 protruding above is mixed with the mixing chamber. 24, and a valve cylinder 34 that is fitted into the upper part of the liquid passage pipe 5 from directly below the mixing chamber 24 and stores the discharge valve 17 is branched and hung inward, and the lower part is circumscribed to the air valve 20. In this way, several intake holes 22 are opened at the bottom of the expanded diameter.

The air passage tube 7 is provided with a large number of grooves for the air passage 21 in a circumferentially dispersed manner on the inner surface thereof, and the air passage of the air cylinder 10 communicates with the mixing chamber 24. A net 23 for equalizing bubbles is stretched at the entrance and exit of the mixing chamber 24.

The push-down head 8 projects a nozzle pipe 25 from one side, and vertically pierces a communication pipe 35 and a coupling pipe 36 from the lower surface, and the communication pipe 35 is an upper portion of the air passage pipe 7. The fitting pipe 36 is fitted onto the small diameter portion of the air passage pipe 7 and is firmly connected to the middle diameter portion of the air passage pipe 7.

The screw 37 on the outer surface of the upper portion of the coupling cylinder 36 is for screwing the movable part into the lower limit position during circulation and screwed into the above-mentioned screw cylinder 28 to prevent inadvertent ejection. Further, 38 is a cylindrical elastic valve having a packing at the top, which opens when the liquid is sucked up by the liquid cylinder 13 after the bubbles are ejected and the inside of the container body 1 becomes a negative pressure, and the outside air is sucked from the intake hole 39 to the container body. 1 to prevent negative pressure in the container body 1.

According to the above-described embodiment, since the air valve 20 is an elastic valve, the structure is not only simple, but the opening / closing is uniquely determined by the mechanical operation of the push-down regardless of the pressure of the air, so the operation is performed. Is immediate and reliable.

Further, at all times, the inner surface of the lower portion of the liquid passage pipe 5 is liquid-tightly joined to the thick portion of the upper portion of the rod body 4 provided inside the axial portion of the liquid cylinder 13, and the inside of the liquid cylinder 13 is sealed at this portion. Therefore, even when the existing ball-shaped discharge valve 17 is opened by rolling or the like by overturning the container, it is possible to prevent the liquid from leaking to the outside.

[0033]

[Effect of device]

 As described above, in the foam jet pump container of the present invention, the elastic valve which is erected from the inner peripheral edge of the free air piston 6 which follows the moving part with a delay of one tempo from the moving part at the time of pushing down and at the time of returning is an air valve. 20, the air valve 20 is inscribed in the lower part of the intake port 22 of the air passage pipe 7 which is a movable part, and the valve opening / closing is pushed down to perform a unique mechanical operation of the return. Therefore, the opening / closing operation is immediate and reliable.

Further, the inner surface of the lower portion of the liquid passage pipe 5 in which the ball-shaped discharge valve 17 is provided in the upper portion is always formed by the thick shaft portion of the upper portion of the rod body 4 provided in the axial center portion of the liquid body cylinder 13. Since the structure that seals the inside of the liquid cylinder 13 by liquid-tightly joining to the outer lower engagement slope 14 is provided, liquid leakage can be reliably prevented even if the container falls and the discharge valve 17 rolls. Reliability can be improved.

[Submission date] August 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Delete

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment.

FIG. 2 is a vertical cross-sectional view of the same embodiment during a pressing operation.

[Explanation of symbols]

 1 container body 2 screw cap 3 cylinder member 4 rod member 5 liquid path pipe 6 air piston 7 air path pipe 8 push-down head

Claims (1)

[Scope of utility model registration request] 1. A container body 1, a screw cap 2 having an opening at the center of the top wall and screwed into the mouth / neck portion of the container body 1, and an axial center of a large-diameter air cylinder 10 having a closed bottom portion. , A suction valve 11 is provided at the bottom opening and the suction pipe 12 hangs downward.
A cylinder member 3 is formed in a double shape in which a small-diameter liquid cylinder 13 is formed by connecting and communicating with each other. The cylinder member 3 is hung vertically from the inside of the container body 1 by the screw cap 2, and the upper part has a thick shaft. A rod body 4 which is vertically fixed to the axial center of the liquid cylinder 13 and a skirt-shaped elastic liquid piston 15 whose lower end slides in contact with the inner surface of the liquid cylinder 13 has an inner surface directly above the piston 15. The engaging slope 16 that can be joined to the engaging slope 14 in a liquid-tight manner is formed so as to rise to the upper outside, the discharge valve 17 is internally provided in the upper portion, and the liquid cylinder is provided from the outer surface of the upper portion.
13 An external pipe 18 that hangs down from the outer circumference is hung vertically.
Liquid path pipe 5 that is pushed upward by a return spring 19 via
A doughnut-shaped air chamber between the outer wall of the air cylinder 10 and the outer pipe 18 of the liquid passage pipe 5, an inner peripheral upper part of which is formed as an elastic air valve 20 of a reverse skirt shape, and between the outer pipe 18 and the outer pipe 18. A follow-up type air piston 6 slidably provided with a ventilation gap in the outer surface of the liquid passage pipe 5 and a ventilation passage between the outer surface and the outer surface.
21 is externally fitted and circumscribes the air valve 20, and a lower end is always provided with an intake hole 22 in a lower expanded portion whose position is slightly above the air piston 6, and further the liquid passage pipe 5 An air passage pipe 7 having an upper upper portion formed in a mixing chamber 24 having a bubble homogenizing net 23, and a push-down head 8 protruding from a nozzle pipe 25 on one side and fitted in communication with the air passage pipe 7. Foam jet pump container consisting of.