JPH07315463A - Foam-discharging-pump container - Google Patents

Abstract

PURPOSE:To form foam in an appropriate mixing ratio from the start of the pumping by making the inflow of air earlier than that of the liquid in charging a mixing chamber with air and the liquid. CONSTITUTION:When a working member 30 is positioned at the upper limit, a larger space is formed between a valve seat 10 at the bottom inside a smaller- diameter cylinder 7 and a valve disc 61 at the lower end of a rod-shaped member 60 which is held upright from inside the bottom part of the smaller-diameter cylinder 7 and whose upper part is fitted in a stem 32 of the working member by frictional engagement than between the lower ends of fitting cylinders 35 extending vertically down from a head 36 and a flange-shaped outward wall 53 of a larger-diameter piston 50. As a result, when the head 36 is pressed down, the larger-diameter piston 50 is pressed down by the fitting cylinders 35 earlier than a pressure valve is closed by the valve disc 61 and a valve seat 10, so that air flows into a mixing chamber 45, formed between a discharge valve 36 and a foaming member 37 inside the fitting cylinders, earlier than liquid flows into the mixing chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam discharge pump container.

[0002]

2. Description of the Related Art For example, a foam discharge pump container of International Publication No. W092 / 08657 is known. The container has a cylinder member having an air cylinder having a large diameter at the upper portion and a liquid cylinder having a small diameter at the lower portion, and an air supply valve to the inside of the container provided at the upper portion of the air cylinder. The valve is sealed with the valve and vertically fixed in the container body, and the large and small diameter stems are fitted from the large and small diameter pistons fitted in the cylinders, and the upper part of the small diameter stem is fitted into the large diameter stem. Standing up by penetrating the lid, a push-down head with a nozzle is attached to the upper end of the large diameter stem, and an actuating member biased upward is provided. A part of the push-down head is pushed down against the bias. Is provided so as to be screwed onto a part of the cover plate. Since the screwing makes the packaging bulky during transportation when the operating member stands up, the operating member is pushed down to the lower limit to downsize the packaging. Liquid flows into the liquid cylinders and outside air into the air cylinders through the suction valves provided in each cylinder, and liquid and air in both cylinders flow through the discharge valve at the upper end of the small diameter stem. In addition, the air is mixed by passing through a passage provided between the large and small stems and further passing through a foaming member fitted into the discharge passage portion above the upper end of the large diameter stem, foaming and discharging from the nozzle. It is provided as follows. The negative pressure due to the decrease of the liquid in the container is eliminated by the air that has flowed in through the air supply valve above the air cylinder.

[0003]

The above-mentioned conventional container passes between the liquid passing through the small diameter stem and the large and small stems into the mixing chamber formed between the discharge valve and the foaming member at substantially the same time as the head is pushed down. Although air flows in, the air that initially enters the mixing chamber is not sufficiently compressed, so the amount of air is insufficient compared to the amount of liquid that enters the mixing chamber. There was a drawback that became.

According to the first aspect of the present invention, air is first introduced before the liquid is introduced into the mixing chamber by pushing down the head.
When the liquid flows in, the sufficiently compressed air flows into the mixing chamber so that foaming having an air amount commensurate with the liquid amount can be obtained from the beginning of pressing the head. And an outside air intake valve capable of effectively and quickly performing pressurization in the air cylinder. Further, the invention of claim 3 provides the invention of claim 1 or claim 2. In addition to the purpose, by forcing the discharge valve to be closed, the stem below the discharge valve and the small-diameter cylinder part are made to be filled with the liquid in the container at all times, so that the pressurized air flows into the mixing chamber. After that, the discharge valve is subsequently opened, and at the same time, the liquid is introduced into the mixing chamber to mix the pressurized air to start proper foam discharge by passing through the foaming member.

[0005]

[Means for Solving the Problem] As a first means, a cylinder member 3 having a large diameter in the upper half and a small diameter in the lower half is fixed in a container body 1 by being fixed by a mounting cylinder 15 fitted in a neck portion of the container body. Hanging down to
On the outer surface of the upper end of the stem 32, which is urged upward from the inside of the small-diameter cylinder portion 7 and stands up, and whose lower end is the small-diameter cylindrical piston 31,
A large inner diameter portion provided at the lower part of the fitting cylinder by fitting the fitting cylinder 35 hanging from the head 34 with the nozzle 33 to form the operating member 30.
35a The outer surface of the upper part is airtightly fitted to the inner surface of the 35a, and the stem 32
An outward flanged wall with a through hole 55 that protrudes from the sliding cylinder 52 that is fitted to the outer surface of the upper portion of the stem 32 in a vertically movable manner by engaging the lower end of the seat 32a attached to the outer surface in an airtight manner. A large-diameter cylindrical piston 51 that fits on the inner surface of the large-diameter cylinder portion is attached to the outer periphery of 53 to form the large-diameter piston 50, and the upper portion from the bottom of the small-diameter cylinder portion 7 is fitted into the stem 32, A rod-shaped member 60 having a lower end serving as a valve body 61 is erected so as to be vertically movable in a small stroke by frictional engagement with the stem, and further the stem 32
The discharge valve 36 is provided on the inner surface of the upper portion of the fitting cylinder 35, and the foam member 37 is fitted on the inner surface of the upper portion of the fitting cylinder 35 to form a large diameter inside the mixing chamber 45 formed between the foam member and the discharge valve and a large diameter piston. The inside of the cylinder portion is communicated with the air passage 47 provided between the stem 32 and the fitting cylinder 35 and the sliding cylinder 52, and the liquid between the rod member 60 and the inner surface of the small diameter cylinder portion 7 and the inner surface of the stem 32 is provided. A rod is provided for the small-diameter cylinder portion 7 by providing a passage.
Large diameter cylindrical piston for 60 and large diameter cylinder part 5
By each frictional engagement of 51, the actuating member 30 is pushed up by the urging force, and it is larger than the gap between the valve seat 10 formed on the inner surface of the bottom of the small diameter cylinder portion and the valve body 61 for opening and closing the valve seat. The gap between the outward flange wall 53 of the large-diameter piston and the lower end surface of the fitting cylinder 35 is made small.

As a second means, the elastic cylinder is equipped with the above-mentioned first means, and the elastic cylinder is airtightly fitted to the outer surface of the sliding cylinder 52 portion below the outward flange wall 53 of the large-diameter piston 50. The through hole 55 was sealed with an elastic thin plate 56 protruding outward to form an outside air intake valve 57 into the large diameter cylinder portion.

As a third means, the discharge valve 36 is provided with the above-mentioned first or second means, the lower small-diameter tapered valve seat 42 provided on the inner surface of the upper part of the stem, and the lower surface of the fitting plate 38 with the through hole. A plurality of elastic pieces 39 vertically hung from the valve member 41 with a valve body 40 having a lower small diameter attached to the lower end of the elastic member 39, the valve body 40 is pressed against the valve seat 42, and the fitting plate 38 is fitted to the inner surface of the upper end of the stem. It was fixed and formed.

[0008]

In the state shown in FIG. 1, the small diameter cylinder portion 7
Between the valve seat 10 formed on the inner surface of the bottom of the rod and the valve body 61 at the lower end of the rod-shaped member 60 that stands up from the bottom and fits the upper part into the stem 32, and into the large-diameter cylinder part 5. Large and small gaps are formed between the outward flange-shaped wall 53 of the large-diameter piston 50 and the lower end of the fitting cylinder 35 hanging from the head 34. When the head 34 is pushed down from this state, the large-diameter piston 50, the head 34, the stem 32,
Since the rod-shaped member 60 descends and the lower end of the fitting cylinder 35 contacts the outward flange-shaped wall 53, the large-diameter piston 50 also descends with respect to the cylinder member 3, and then the valve body 61 with respect to the valve seat 10. The valve closes. When the head or the like is lowered, the air passage 47 is opened, and when the large-diameter piston 50 descends, the air in the large-diameter cylinder portion is pressurized and enters the mixing chamber 45, and subsequently, the valve seat 10 and the valve body 61.
The valve formed by and is closed, and the lower end is a small diameter cylindrical piston.
By lowering the stem 32, which is 31 to the rod-shaped member 60, the liquid in the small diameter cylinder portion 7 and the stem 32 is pressurized,
The discharge valve 36 opens, the liquid enters the mixed air, mixes with the air, and communicates with the foaming member 37, and is discharged as bubbles from the nozzle 33.

When the head 34 is released after being pushed down, the rod member 60 and the actuating member 30 are both raised with respect to the cylinder member 3 and the large-diameter piston 50, and the seat 32a of the stem 32 is brought to the lower end surface of the sliding cylinder 52. Pushes up the large-diameter piston in contact with the rod-shaped member 60
The engaging element 62 that projects radially from the lower outer surface of the
25 By contacting the lower end surface, the rod member 60 becomes the cylinder member 3
And the actuating member 30 moves to the upper limit.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the first embodiment shown in FIGS. 1 and 2 will be described. 1 is a container body in which a mouth / neck portion 2 is erected via a shoulder portion.

Reference numeral 3 denotes a cylinder member, and an outward flange 4 attached to the outer surface of the upper portion is engaged with the upper end surface of the neck portion of the container body to hang it down into the container body.
In addition, the lower half that hangs from the lower end thereof via the inward flange-shaped portion 6 is the small diameter cylinder portion 7. The large-diameter cylinder portion stands upright above the outward flange 4, and the base end portion of the outward flange is provided with an outside air supply hole 8 into the container body. On the inner surface of the lower end of the small-diameter cylinder portion 7, a lower small-diameter valve seat 10 is provided via an upward step 9, and a fitting cylinder 11 is hung so as to communicate with the valve hole and an upper end portion is inserted into the fitting cylinder. A suction pipe 12 is hung down to fit into the bottom of the container body, and a plurality of supporting pieces 13 are erected at equal intervals from the upward step 9.

In the cylinder member, the outward flange 4 is fixed by a mounting cylinder 15 screwed to the neck of the container body. The mounting cylinder has an outer cylinder portion 18 which holds the outward flange between the upper neck surface of the mouth and neck with an inward flange 17 at the upper end of the cylinder 16 which is screwed onto the outer surface of the mouth neck, and which stands upright from the inner circumference of the inward flange. A top plate 19 is provided so as to project inward from the upper end, and a head guide cylinder 20 is hung from the inner circumference of the top plate. An outside air inflow groove 21 may be provided vertically on the inner surface of the inner cylinder. An annular valve member 22 is fitted on the inner surface of the guide cylinder. The member projects an elastic plate that expands upward and outward from the lower end of the fitting cylinder to the guide cylinder 20 and presses the outer surface of the upper end of the elastic plate against the inner surface of the upper end cylinder portion of the cylinder member 3 to reduce the liquid inside the container. When the negative pressure is applied, the elastic plate upper end portion is expanded, and the space between the upper end surface of the cylinder member 3 upper end cylinder portion and the top plate 19, and between the cylinder member upper end cylinder portion and the outer cylinder portion 18 is increased.
In the meantime, the negative pressure state is eliminated by further entering the container body through the outside air supply hole 8.

From inside the small-diameter cylinder portion 7, the lower end is placed on the above-mentioned plurality of support pieces 13 and is biased upward by the coil spring 25 housed in the small-diameter cylinder portion to actuate the operating member 30.
Stand up. The member is one in which the inner surface of the fitting cylinder 35 hanging from the head 34 with the nozzle 33 is fitted to the upper end of the stem 32 with the lower end having a small diameter cylindrical piston 31, and the discharge valve 36 is provided on the upper inner surface of the stem 32. A short cylinder on the inner surface of the fitting cylinder above the discharge valve
The upper and lower end surfaces of 37a are fitted with foam members 37 that are closed by foam nets 37b. The discharge valve 36 is a valve member in which a lower small-diameter taper valve seat 42 provided on the inner surface of the upper part of the stem and a plurality of elastic pieces 39 suspended from the lower surface of the fitting plate 38 with a through hole are provided with a lower small-diameter valve body 40 at the lower end. With 41, the fitting plate 38 is formed by being fitted and fixed to the inner surface of the upper end portion of the stem 32 so that the elastic piece presses the valve body against the valve seat. A plurality of grooves 43 are vertically provided on the inner surface of the stem portion below the valve seat 42.

The fitting cylinder 35 hanging from the head 34 has a double cylinder shape in the illustrated example to prevent the fitting cylinder 35 from being thickened. The lower end of the fitting cylinder 35 in which the upper part of the stem is fitted has a large inner diameter portion 35a, and a vertical groove 44 is formed on the inner surface of the fitting cylinder from the upper end of the large diameter inner portion to the fitting portion of the short cylinder 37a, and the vertical groove and the valve. Member fitting plate 38 and short tube 37
A vertical groove 46 communicating with the inside of the mixing chamber 45 formed between a and a is provided on the outer surface of the short cylinder 37a, and the upper ends of both vertical grooves are connected to form a part of an air passage 47 described later.

On the outer surface of the intermediate portion of the stem 32, there is provided a seat 32a for projecting a cylindrical portion obliquely upward from the outer end of the outward projecting plate portion, and the seat 32a is fitted into the large diameter cylinder portion. It can be engaged with the large-diameter piston 50 that has been combined. The large-diameter piston 50
Is a large-diameter cylindrical piston 51 fitted in the large-diameter cylinder part.
The sliding cylinder fitted to the outer surface of the stem above the seat.
It is formed by connecting outward flange-shaped walls 53 projecting from 52, and the sliding cylinder 52 is formed with a groove 54 in the inner surface of the sliding cylinder 52 so as to form an outer surface of the stem portion into which the sliding cylinder is fitted. A passage is provided therebetween, and the upper end of the sliding cylinder is expanded upward and outward so that the outer edge of the upper end is airtightly fitted to the inner wall surface of the large inner diameter portion 35a. Further, the outward flange-shaped wall 53 is provided with a through hole 55, and the through hole is
An elastic thin plate 56 is fitted to the outer surface of the sliding cylinder below the outward flange-shaped wall 53 in an airtight manner, and protrudes outward from the elastic cylinder 56.
The through hole 55 and the elastic thin plate 56 form an outside air intake valve 57 into the large diameter cylinder portion. However, the outside air intake valve can be made unnecessary by providing the through hole 55 so that the lower end surface of the fitting cylinder 35 is closed when the head 34 is pushed down.

The large-diameter piston 50 is movable up and down by a small stroke with respect to the actuating member 30, and when the actuating member 30 descends with respect to the large-diameter piston 50 by pushing down the head 34, the large-diameter piston 50 slides on the receiving seat 32a. An air passage 47 formed by the groove 54, the vertical groove 44, etc., which opens the lower end of the moving cylinder 52 and communicates the inside of the large-diameter cylinder portion 5 with the mixing chamber 45, and opens the lower end surface of the fitting cylinder 35 outward. The large-diameter piston 50 is pushed down by contacting the upper surface of the flange-shaped wall 53. Further, when the head 34 is released after the operating member 30 descends, the seat 32a of the operating member comes into contact with the lower end surface of the sliding cylinder 52 so that the air passage
When 47 is closed and the large-diameter piston 50 is pushed up together with the operating member, the outside air flows into the large-diameter cylinder portion 5 through the through hole 55 between the head guide cylinder 20 and the fitting cylinder 35 described above. To do.

From the bottom of the small-diameter cylinder portion 7, the upper part is fitted into the stem 32, and a small stroke can be vertically moved by frictional engagement with the stem 32, and the lower end serves as a valve body 61.
Stand up. The member has a plurality of engaging elements radially from the lower outer surface.
By projecting 62, the engaging elements are fitted between the supporting pieces 13 at the bottom of the small-diameter cylinder part so as to be vertically movable, and by engaging with the lower end of the coil spring 25 mounted on the upper end of the supporting piece. The upper limit of the rod-shaped member 60 is determined, and the lower limit is determined by the valve body 61 coming into contact with the valve seat 10 and closing the valve when the operating member descends. A groove 63 is vertically provided in the rod-shaped member, and a taper portion 64 that expands obliquely outward is attached to the upper end portion so that the outer surface of the upper end of the taper portion is engaged with the inner surface of the stem 32 by a frictional force. ing.
In the illustrated example, the leg cylinder portion 31a standing upright from the small diameter cylindrical piston 31.
Although it is fitted into the lower part of the stem, it may be integrally molded.

FIG. 3 shows a second embodiment. The embodiment is the first
It is almost the same as the embodiment, but the structure is partially different.

Explaining the main differences, the cylinder member 3 has a short cylinder 4a standing upright from the outer circumference of the outward flange 4, and the short cylinder is attached to the inner surface of the upper part of the threaded cylinder 16 of the mounting cylinder 15 and the inner circumference of the inward flange. The entire pump device is integrally removable by fitting the fitting cylinder 15 into the engagement cylinder 17a that hangs down from the section and removing the mounting cylinder 15 from the neck portion of the container body.

Further, the upper end of the large-diameter cylinder portion is slightly projected above the outward flange 4, so that the fitting cylinder of the annular valve member 22 is hung vertically below the head guide cylinder 20 and elastically extends from the lower end through the flange. The plate is projected outward and its upper end is pressed against the inner surface of the upper end of the large-diameter cylinder portion 5.

Next, the leg cylinder 31a which is erected from the small-diameter cylindrical piston 31 and fitted into the lower part of the stem is bent upward inward, and the tapered portion 64 at the upper end of the rod member 60 is elastically deformable. The upper end surface of the leg cylinder is brought into pressure-contact with the outer surface of the intermediate portion of the portion in a watertight manner to form a seal valve 65. The valve is provided so as to close the inside of the stem intermediate portion when the actuating member is lifted up so that the discharge valve can be opened even if the container falls down.

The discharge valve 36 is formed of a ball valve, and a mixing chamber forming cylinder 70 is fitted between the discharge valve 36 and the foaming member 37 above the discharge valve. The upper part of the cylinder has a large outer diameter, the lower half of the foam member 37 is fitted in the large outer diameter part 71, and the lower part is fitted in the upper end part of the stem 32 as the small outer diameter part 72. From the bottom surface of the diameter part,
Plural leg pieces 73 are suspended so that the ball valve 36a does not block the lower end of the cylindrical hole by pushing up by the liquid passing through the discharge valve hole. Therefore, the air passage 47 is formed by the vertical groove 44 on the inner surface of the fitting cylinder 35 into which the upper part of the stem is fitted, the lateral groove 74 provided on the lower end surface of the large outer diameter portion, and the groove 75 provided vertically on the outer surface of the small outer diameter portion. ing.

Further, the through hole 55 of the large-diameter piston 50 is bored at the end of the outward flange wall 53 on the side of the sliding cylinder 52, and the elastic thin plate 56 as the valve for opening and closing the through hole is The outer end thereof is pressed against the inner surface of the intermediate portion of the tubular portion 53a provided in the intermediate portion of the outward flange-shaped wall.

[0024]

According to the present invention having the above-described structure, the valve seat 10 formed on the inner surface of the bottom portion of the small diameter cylinder portion 7 and the upper portion of the valve seat 10 standing up from the bottom portion of the small diameter cylinder portion are fitted into the stem 32. Then, the outward flange-shaped wall 53 of the large-diameter piston 50 and the head 34 are larger than the gap between the rod-shaped member 60 standing up and down by a small stroke up and down by frictional engagement with the stem and the valve body 61.
Since the gap between the lower end surface of the fitting cylinder 35 that hangs down from the above is made small, when the head 34 is pushed down, first, the air passage 47 that communicates between the inside of the large diameter cylinder portion 5 and the inside of the mixing chamber 45 is opened. After the pressurized air starts to flow into the mixing chamber 45, the valve body 61 of the rod-shaped member 60 closes the valve seat 10 at the inner bottom of the small diameter cylinder portion 7, and thus the small diameter cylinder between the valve and the discharge valve 36. Since the inside of the portion 7 and the inside of the stem 32 are pressurized, the discharge valve 36 is opened, and after the inflow of the pressurized air is started, the liquid enters the mixing chamber 45. The mixing ratio between the amount of liquid and the amount of liquid can be made appropriate, and the foaming does not become incomplete due to the lack of the amount of air with respect to the amount of liquid as in the conventional case.

In the case of the second aspect of the present invention, in addition to the above effects, the elastic cylinder of the annular valve member 22 is airtightly fitted to the outer surface of the sliding cylinder 5 portion below the outward flange wall 53 of the large-diameter piston 50. Then, the through hole 55 formed in the outward flange-like wall is sealed by the elastic thin plate 56 projecting outward from the elastic cylinder to form the outside air intake valve 57 into the large diameter cylinder portion. At the time of lowering, the air in the large-diameter cylinder portion 5 does not leak through the through hole, so that the air in the large-diameter cylinder portion 5 can be reliably sent to the mixing chamber 45 through the air passage 47. I can.

In the case of the invention of claim 3, in addition to having the effect of the invention of claim 1 or 2, the discharge valve 36 is elastically closed by urging, so that the inside of the stem 32 below the discharge valve and the small diameter cylinder. The liquid is constantly filled in the portion 7 and the like, so that the liquid in the stem and the like flows into the mixing chamber 45 at the same time as the discharge valve is released by pressing down the head. It is possible to emit bubbles that mix air and liquid.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a container of the present invention.

FIG. 2 is an end view of a section taken along the line II-II of FIG.

FIG. 3 is a vertical cross-sectional view of a second embodiment container.

[Explanation of symbols]

 3 ... Cylinder member 15 ... Fitting cylinder 30 ... Actuating member 47 ... Air passage 50 ... Large diameter piston 60 ... Rod-shaped member

Claims (3)

[Claims] 1. A cylinder member 3 having a large diameter in an upper half portion and a small diameter in a lower half portion is fixed into a container body 1 by being fixed by a mounting cylinder 15 fitted in a neck portion of a container body, and inside a small diameter cylinder portion 7. From the upper end outer surface of the stem 32 whose lower end is a small-diameter cylindrical piston 31, which is urged upward from the head, the fitting cylinder 35 hanging from the head 34 with the nozzle 33 is fitted to form the operating member 30. The upper outer surface is airtightly fitted to the inner surface of the large inner diameter portion 35a provided in the lower part of the coupling tube, and the lower end is airtightly engaged with the seat 32a attached to the outer surface of the stem 32 to make a small stroke to the outer surface of the upper portion of the stem 32. A large-diameter cylindrical piston 51 that fits on the inner surface of the large-diameter cylinder portion is attached to the outer periphery of the outward flange-shaped wall 53 with a through hole 55 that projects from the sliding cylinder 52 that is vertically movable. No diameter piston 50, and by fitting the inside of the small diameter cylinder portion 7 from the bottom to the top into the stem 32, A rod-like member 60 having a lower end serving as a valve body 61 is erected by a frictional engagement with a small stroke up and down, a discharge valve 36 is further provided on an upper inner surface of the stem 32, and a foaming member is provided on an upper inner surface of the fitting cylinder 35. Fit the 37,
The mixing chamber 45 formed between the foaming member and the discharge valve and the large-diameter cylinder portion below the large-diameter piston are connected to the stem 32 and a fitting cylinder.
35 and the air passage 47 provided between the sliding cylinder 52,
Also, the rod-shaped member 60, the inner surface of the small diameter cylinder portion 7 and the stem 32
A liquid passage is provided between the rod member 60 and the inner surface, and the rod member 60 is frictionally engaged with the small cylinder portion 7 and the large cylindrical piston 51 is engaged with the large cylinder portion 5.
With 30 being pushed up by the urging force, the outward flange shape of the large-diameter piston is larger than the gap between the valve seat 10 formed on the inner surface of the bottom of the small-diameter cylinder portion and the valve body 61 for opening and closing the valve seat. A foam discharging pump container characterized in that a gap between the wall 53 and the lower end surface of the fitting cylinder 35 is made small. 2. An outward flange-shaped wall 53 of the large-diameter piston 50.
An elastic cylinder is airtightly fitted to the outer surface of the lower sliding cylinder 52, and the through hole 55 is sealed by an elastic thin plate 56 projecting outward from the elastic cylinder to form an outside air intake valve 57 into the large diameter cylinder part. The foam discharge pump container according to claim 1, wherein the pump container is a foam discharge pump container. 3. A discharge valve 36 is provided with a lower-diameter taper valve seat 42 provided on the inner surface of the upper portion of the stem, and a plurality of elastic pieces 39 vertically extending from the lower surface of the fitting plate 38 with a through hole, and a valve body having a lower-small diameter. A valve member (41) provided with a valve member (40) attached to the valve seat (42) in pressure contact with the valve plate (40), and a fitting plate (38) fitted and fixed to the inner surface of the upper end portion of the stem. The pump container for foam discharge described.